System File Chooser: (PR #988)

- fixed missing filter in combobox if only `setFileFilter(myFilter)` is used, but not `addChoosableFileFilter(myFilter)`
- fallback Swing file chooser did ignore `isAcceptAllFileFilterUsed()`
- check for supported filter types in `setFileFilter()`

.editorconfig

@@ -7,6 +7,11 @@ charset = latin1
 indent_style = tab
 indent_size = 4
 
+[{*.yaml,*.yml}]
+end_of_line = lf
+indent_style = space
+indent_size = 2
+
 [*.java]
 indent_style = tab
 ij_continuation_indent_size = 4

.github/actions/cache-gradle/action.yml

@@ -0,0 +1,32 @@
+# https://docs.github.com/en/actions/tutorials/create-actions/create-a-composite-action#creating-a-composite-action-within-the-same-repository
+
+# cache uses two files:
+#
+#   - gradle-wrapper-<os>-<arch>-<hash>:
+#       contains the Gradle wrapper/distribution (~/.gradle/wrapper)
+#       and is updated when the Gradle version changed
+#   - gradle-caches-<os>-<arch>-<hash>:
+#       contains the Gradle caches (~/.gradle/caches), buildSrc/build and buildSrc/.gradle
+#       and is updated when Gradle related files were changed
+#       buildSrc/.gradle is needed so that buildSrc tasks are UP-TO-DATE
+
+name: 'Cache Gradle'
+runs:
+  using: "composite"
+  steps:
+
+    - name: Cache '.gradle/wrapper'
+      uses: actions/cache@v4
+      with:
+        key: gradle-wrapper-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles( 'gradle/wrapper/gradle-wrapper.properties' ) }}
+        path: |
+          ~/.gradle/wrapper
+
+    - name: Cache '.gradle/caches' and 'buildSrc/build'
+      uses: actions/cache@v4
+      with:
+        key: gradle-caches-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles( '**/*.gradle*', 'gradle/**', 'gradle.properties', 'buildSrc/src/**' ) }}
+        path: |
+          ~/.gradle/caches
+          buildSrc/build
+          buildSrc/.gradle

.github/workflows/ci.yml

@@ -9,46 +9,64 @@ on:
       - '*'
     tags:
       - '[0-9]*'
+    paths-ignore:
+      - '**.md'
+      - '.*'
+      - '**/.settings/**'
+      - 'flatlaf-core/svg/**'
+      - 'flatlaf-natives/**'
+      - 'flatlaf-testing/dumps/**'
+      - 'flatlaf-testing/misc/**'
+      - 'images/**'
 
 jobs:
   build:
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: gradle/actions/wrapper-validation@v4
+
+      - name: Setup Java 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: temurin  # pre-installed on ubuntu-latest
+
+      - name: Cache Gradle
+        uses: ./.github/actions/cache-gradle
+
+
         # test against
         # - Java 8 (minimum requirement)
         # - Java LTS versions (11, 17, ...)
-        # - lastest Java version(s)
-        java:
-          - 8
-          - 11  # LTS
-          - 17  # LTS
-          - 19
-        toolchain: [""]
-#        include:
-#          - java: 17
-#            toolchain: 19  # latest
+        # - latest Java version(s)
 
-    steps:
-      - uses: actions/checkout@v3
+      - name: Build with Java 11 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=11
 
-      - uses: gradle/wrapper-validation-action@v1
-        if: matrix.java == '8'
+      - name: Build with Java 17 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=17
 
-      - name: Setup Java ${{ matrix.java }}
-        uses: actions/setup-java@v3
-        with:
-          java-version: ${{ matrix.java }}
-          distribution: adopt  # Java 8 and 11 are pre-installed on ubuntu-latest
-          cache: gradle
+      - name: Build with Java 21 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=21
 
-      - name: Build with Gradle
-        run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
+      - name: Build with Java 25 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=25
 
-      - name: Upload artifacts
-        uses: actions/upload-artifact@v3
-        if: matrix.java == '11'
+
+        # build with Java 8 for snapshot
+
+      - name: Build with Java 8
+        run: ./gradlew build
+
+      - name: Upload artifacts to GitHub Actions
+        uses: actions/upload-artifact@v4
         with:
           name: FlatLaf-build-artifacts
           path: |
@@ -58,40 +76,15 @@ jobs:
             !**/*-sources.jar
 
 
-  snapshot:
-    runs-on: ubuntu-latest
-    needs: build
-    if: |
-      github.event_name == 'push' &&
-      (github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' )) &&
-      github.repository == 'JFormDesigner/FlatLaf'
-
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Setup Java 11
-        uses: actions/setup-java@v3
-        with:
-          java-version: 11
-          distribution: adopt  # pre-installed on ubuntu-latest
-          cache: gradle
-
-      - name: Publish snapshot to oss.sonatype.org
-        run: ./gradlew publish :flatlaf-theme-editor:build -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true
+      - name: Publish snapshot to Sonatype Central
+        if: |
+          github.repository == 'JFormDesigner/FlatLaf' &&
+          github.event_name == 'push' &&
+          (github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' ))
+        run: ./gradlew publish -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
         env:
-          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
-          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
-
-      - name: Upload theme editor
-        uses: sebastianpopp/ftp-action@releases/v2
-        with:
-          host: ${{ secrets.FTP_SERVER }}
-          user: ${{ secrets.FTP_USERNAME }}
-          password: ${{ secrets.FTP_PASSWORD }}
-          forceSsl: true
-          localDir: "flatlaf-theme-editor/build/libs"
-          remoteDir: "snapshots"
-          options: "--only-newer --no-recursion --verbose=1"
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
 
 
   release:
@@ -103,41 +96,31 @@ jobs:
       github.repository == 'JFormDesigner/FlatLaf'
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - name: Setup Java 11
-        uses: actions/setup-java@v3
+      - name: Setup Java 21
+        uses: actions/setup-java@v4
         with:
-          java-version: 11
-          distribution: adopt  # pre-installed on ubuntu-latest
-          cache: gradle
+          java-version: 21
+          distribution: temurin  # pre-installed on ubuntu-latest
 
-      - name: Release a new stable version to Maven Central
-        run: ./gradlew publish :flatlaf-demo:build :flatlaf-theme-editor:build -PskipFonts -Prelease
+      - name: Cache Gradle
+        uses: ./.github/actions/cache-gradle
+
+      - name: Release a new stable version to Maven Central and build demo and theme editor
+        run: ./gradlew publishToSonatype closeSonatypeStagingRepository :flatlaf-demo:build :flatlaf-theme-editor:build -PskipFonts -Prelease -Dorg.gradle.parallel=false
         env:
-          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
-          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
           SIGNING_KEY:      ${{ secrets.SIGNING_KEY }}
           SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
 
-      - name: Upload demo
-        uses: sebastianpopp/ftp-action@releases/v2
-        with:
-          host: ${{ secrets.FTP_SERVER }}
-          user: ${{ secrets.FTP_USERNAME }}
-          password: ${{ secrets.FTP_PASSWORD }}
-          forceSsl: true
-          localDir: "flatlaf-demo/build/libs"
-          remoteDir: "."
-          options: "--only-newer --no-recursion --verbose=1"
+      - name: Install lftp
+        run: sudo apt-get -y install lftp
 
-      - name: Upload theme editor
-        uses: sebastianpopp/ftp-action@releases/v2
-        with:
-          host: ${{ secrets.FTP_SERVER }}
-          user: ${{ secrets.FTP_USERNAME }}
-          password: ${{ secrets.FTP_PASSWORD }}
-          forceSsl: true
-          localDir: "flatlaf-theme-editor/build/libs"
-          remoteDir: "."
-          options: "--only-newer --no-recursion --verbose=1"
+      - name: Upload demo and theme editor
+        run: >
+          lftp -c "set ftp:ssl-force true;
+            open -u ${{ secrets.FTP_USERNAME }},${{ secrets.FTP_PASSWORD }} ${{ secrets.FTP_SERVER }};
+            mput flatlaf-demo/build/libs/flatlaf-demo-*.jar;
+            mput flatlaf-theme-editor/build/libs/flatlaf-theme-editor-*.jar"

.github/workflows/error-prone.yml

@@ -0,0 +1,40 @@
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+# https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-gradle
+
+name: Error Prone
+
+on:
+  push:
+    branches:
+      - '*'
+    tags:
+      - '[0-9]*'
+    paths-ignore:
+      - '**.md'
+      - '.*'
+      - '**/.settings/**'
+      - 'flatlaf-core/svg/**'
+      - 'flatlaf-natives/**'
+      - 'flatlaf-testing/dumps/**'
+      - 'flatlaf-testing/misc/**'
+      - 'images/**'
+
+jobs:
+  error-prone:
+    runs-on: ubuntu-latest
+    if: github.repository == 'JFormDesigner/FlatLaf'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Java 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: temurin  # pre-installed on ubuntu-latest
+
+      - name: Cache Gradle
+        uses: ./.github/actions/cache-gradle
+
+      - name: Check with Error Prone
+        run: ./gradlew errorprone

.github/workflows/fonts.yml

@@ -13,6 +13,8 @@ on:
             - 'flatlaf-fonts/**'
             - '.github/workflows/fonts.yml'
             - 'gradle/wrapper/gradle-wrapper.properties'
+            - '!**.md'
+            - '!**/.settings/**'
 
 jobs:
     Fonts:
@@ -30,31 +32,33 @@ jobs:
             github.repository == 'JFormDesigner/FlatLaf'
 
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
 
-            - name: Setup Java 11
-              uses: actions/setup-java@v3
+            - name: Setup Java 21
+              uses: actions/setup-java@v4
               with:
-                  java-version: 11
-                  distribution: adopt  # pre-installed on ubuntu-latest
-                  cache: gradle
+                  java-version: 21
+                  distribution: temurin  # pre-installed on ubuntu-latest
+
+            - name: Cache Gradle
+              uses: ./.github/actions/cache-gradle
 
             - name: Build with Gradle
               run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:build
               if: startsWith( github.ref, format( 'refs/tags/fonts/{0}-', matrix.font ) ) != true
 
-            - name: Publish snapshot to oss.sonatype.org
+            - name: Publish snapshot to Sonatype Central
               run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:publish -Dorg.gradle.internal.publish.checksums.insecure=true
               env:
-                  OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
-                  OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+                  SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+                  SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
               if: github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' )
 
             - name: Release a new stable version to Maven Central
               run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:build :flatlaf-fonts-${{ matrix.font }}:publish -Prelease
               env:
-                  OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
-                  OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+                  SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+                  SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
                   SIGNING_KEY:      ${{ secrets.SIGNING_KEY }}
                   SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
               if: startsWith( github.ref, format( 'refs/tags/fonts/{0}-', matrix.font ) )

.github/workflows/natives.yml

@@ -13,38 +13,119 @@ on:
             - 'flatlaf-natives/**'
             - '.github/workflows/natives.yml'
             - 'gradle/wrapper/gradle-wrapper.properties'
+            - '!**.md'
+            - '!**/.settings/**'
 
 jobs:
     Natives:
         strategy:
             matrix:
                 os:
-                    - windows
-                    - ubuntu
+                    - windows-latest
+                    - macos-latest
+                    - ubuntu-latest
+                    - ubuntu-24.04-arm
 
-        runs-on: ${{ matrix.os }}-latest
+        runs-on: ${{ matrix.os }}
 
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
 
-            - uses: gradle/wrapper-validation-action@v1
+            - uses: gradle/actions/wrapper-validation@v4
 
-            - name: Setup Java 11
-              uses: actions/setup-java@v3
+            - name: apt update (Linux)
+              if: matrix.os == 'ubuntu-latest' || matrix.os == 'ubuntu-24.04-arm'
+              run: sudo apt-get update
+
+            - name: install libxt-dev and libgtk-3-dev (Linux)
+              if: matrix.os == 'ubuntu-latest' || matrix.os == 'ubuntu-24.04-arm'
+              run: sudo apt-get install libxt-dev libgtk-3-dev
+
+#           - name: Download libgtk-3.so for arm64 (Linux)
+#             if: matrix.os == 'ubuntu-latest'
+#             working-directory: flatlaf-natives/flatlaf-natives-linux/lib/aarch64
+#             run: |
+#               pwd
+#               ls -l /usr/lib/x86_64-linux-gnu/libgtk*
+#               wget --no-verbose https://ports.ubuntu.com/pool/main/g/gtk%2b3.0/libgtk-3-0_3.24.18-1ubuntu1_arm64.deb
+#               ls -l
+#               ar -x libgtk-3-0_3.24.18-1ubuntu1_arm64.deb data.tar.xz
+#               tar -xvf data.tar.xz --wildcards --to-stdout "./usr/lib/aarch64-linux-gnu/libgtk-3.so.0.*" > libgtk-3.so
+#               rm libgtk-3-0_3.24.18-1ubuntu1_arm64.deb data.tar.xz
+#               ls -l
+
+#           - name: install g++-aarch64-linux-gnu (Linux)
+#             if: matrix.os == 'ubuntu-latest'
+#             run: sudo apt-get install g++-aarch64-linux-gnu
+
+            - name: Setup Java 21
+              uses: actions/setup-java@v4
               with:
-                  java-version: 11
-                  distribution: adopt
-                  cache: gradle
+                  java-version: 21
+                  distribution: temurin
+
+            - name: Cache Gradle
+              uses: ./.github/actions/cache-gradle
 
             - name: Build with Gradle
               # --no-daemon is necessary on Windows otherwise caching Gradle would fail with:
               #   tar.exe: Couldn't open ~/.gradle/caches/modules-2/modules-2.lock: Permission denied
               run: ./gradlew build-natives --no-daemon
 
+            - name: Sign Windows DLLs
+              if: matrix.os == 'windows-latest'
+              uses: skymatic/code-sign-action@v3
+              with:
+                certificate: '${{ secrets.CODE_SIGN_CERT_BASE64 }}'
+                password: '${{ secrets.CODE_SIGN_CERT_PASSWORD }}'
+                certificatesha1: '${{ secrets.CODE_SIGN_CERT_SHA1 }}'
+                folder: 'flatlaf-core/src/main/resources/com/formdev/flatlaf/natives'
+
+            - name: Sign macOS natives
+              if: matrix.os == 'DISABLED--macos-latest'
+              env:
+                CERT_BASE64: ${{ secrets.CODE_SIGN_CERT_BASE64 }}
+                CERT_PASSWORD: ${{ secrets.CODE_SIGN_CERT_PASSWORD }}
+                CERT_IDENTITY: ${{ secrets.CODE_SIGN_CERT_IDENTITY }}
+              run: |
+                # https://docs.github.com/en/actions/use-cases-and-examples/deploying/installing-an-apple-certificate-on-macos-runners-for-xcode-development
+                # create variables
+                CERTIFICATE_PATH=$RUNNER_TEMP/cert.p12
+                KEYCHAIN_PATH=$RUNNER_TEMP/signing.keychain-db
+                KEYCHAIN_PASSWORD=$CERT_PASSWORD
+                # decode certificate
+                printenv CERT_BASE64 | base64 --decode > $CERTIFICATE_PATH
+                # create temporary keychain
+                security create-keychain -p "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
+                security set-keychain-settings -lut 21600 $KEYCHAIN_PATH
+                security unlock-keychain -p "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
+                # import certificate to keychain
+                security import $CERTIFICATE_PATH -P "$CERT_PASSWORD" -A -t cert -f pkcs12 -k $KEYCHAIN_PATH
+                # set partition list (required for codesign)
+                security set-key-partition-list -S apple-tool:,apple: -k "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
+                # add keychain to keychain search list
+                security list-keychains -d user -s $KEYCHAIN_PATH
+                # sign code
+                codesign --sign "$CERT_IDENTITY" --force --verbose=4 --timestamp \
+                  flatlaf-core/src/main/resources/com/formdev/flatlaf/natives/libflatlaf-macos-*.dylib
+                codesign --display --verbose=4 flatlaf-core/src/main/resources/com/formdev/flatlaf/natives/libflatlaf-macos-*.dylib
+                # cleanup
+                security delete-keychain $KEYCHAIN_PATH
+
+            - name: Set artifacts pattern
+              shell: bash
+              run: |
+                case ${{ matrix.os }} in
+                    windows-latest)    echo "artifactPattern=flatlaf-windows-*.dll"      >> $GITHUB_ENV ;;
+                    macos-latest)      echo "artifactPattern=libflatlaf-macos-*.dylib"   >> $GITHUB_ENV ;;
+                    ubuntu-latest)     echo "artifactPattern=libflatlaf-linux-x86_64.so" >> $GITHUB_ENV ;;
+                    ubuntu-24.04-arm)  echo "artifactPattern=libflatlaf-linux-arm64.so"  >> $GITHUB_ENV ;;
+                esac
+
             - name: Upload artifacts
-              uses: actions/upload-artifact@v3
+              uses: actions/upload-artifact@v4
               with:
                   name: FlatLaf-natives-build-artifacts-${{ matrix.os }}
                   path: |
-                      flatlaf-core/src/main/resources/com/formdev/flatlaf/natives
+                      flatlaf-core/src/main/resources/com/formdev/flatlaf/natives/${{ env.artifactPattern }}
                       flatlaf-natives/flatlaf-natives-*/build

.github/workflows/pr-snapshots.yml

@@ -0,0 +1,39 @@
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+
+name: PR Snapshots
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'
+      - '.*'
+      - '**/.settings/**'
+      - 'flatlaf-core/svg/**'
+      - 'flatlaf-testing/dumps/**'
+      - 'flatlaf-testing/misc/**'
+      - 'images/**'
+
+jobs:
+  snapshot:
+    runs-on: ubuntu-latest
+    if: github.repository == 'JFormDesigner/FlatLaf'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Java 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: temurin  # pre-installed on ubuntu-latest
+
+      - name: Cache Gradle
+        uses: ./.github/actions/cache-gradle
+
+      - name: Publish PR snapshot to Sonatype Central
+        run: >
+          ./gradlew publish -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
+          -Pgithub.event.pull_request.number=${{ github.event.pull_request.number }}
+        env:
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}

.gitignore

@@ -5,6 +5,7 @@ build/
 .project
 .settings/
 .idea/
+.consulo/
 out/
 *.iml
 *.ipr

CHANGELOG.md

@@ -1,6 +1,598 @@
 FlatLaf Change Log
 ==================
 
+## 3.7-SNAPSHOT
+
+#### New features and improvements
+
+- System File Chooser allows using **operating system file dialogs** in Java
+  Swing applications. (PR #988)
+- Zooming API. (PR #1051)
+- TabbedPane: Added icon-only tab mode, which shows tab icons but hides tab
+  titles. Tab titles are used in "Show Hidden Tabs" popup menu. (set client
+  property `JTabbedPane.tabWidthMode` to `"iconOnly"`)
+- TabbedPane: In scroll tab layout, propagate mouse wheel events to ancestors.
+  This allows mouse wheel scrolling if JTabbedPane is inside a JScrollPane. (PR
+  #1030)
+
+#### Fixed bugs
+
+- CheckBox and RadioButton: Fixed styling of custom icon. Also fixed focus width
+  (and preferred size) if using custom icon. (PR #1060)
+- TabbedPane: In "Show Hidden Tabs" popup menu, do not show text "x. Tab" if tab
+  has icon but no title. (issue #1062)
+- TextField: Fixed wrong leading/trailing icon placement if border is set to
+  `null`. (issue #1047)
+- Extras: UI defaults inspector: Exclude inspector window from being blocked by
+  modal dialogs. (issue #1048)
+- JideButton, JideToggleButton, JideSplitButton and JideToggleSplitButton: Paint
+  border in button style `TOOLBAR_STYLE` if in selected state. (issue #1045)
+
+
+## 3.6.2
+
+#### New features and improvements
+
+- If using `FlatLaf.registerCustomDefaultsSource( "com.myapp.themes" )` and
+  named Java modules, it is no longer necessary to add `opens com.myapp.themes;`
+  to `module-info.java`. (issue #1026)
+- Extras: Made animated theme change (class `FlatAnimatedLafChange`) smoother.
+
+#### Fixed bugs
+
+- Tree and List: Fixed painting of rounded drop backgrounds. (issue #1023)
+- Popup: Showing tooltip in inactive window brought that window to front (made
+  it active) and potentially hid the previously active window. (issue #1037)
+- Popup: No longer reuse popup windows for menus to avoid immediately closing
+  dialogs on ChromeOS. (issue #1029)
+- macOS: Fixed window "flashing" when switching from a light to a dark theme (or
+  vice versa). Especially when using animated theme changer (see
+  [FlatLaf Extras](flatlaf-extras)).
+
+#### Incompatibilities
+
+- FlatLaf properties files are now loaded using the UTF-8 character encoding
+  instead of ISO 8859-1. In usual properties files you will not notice any
+  difference because they use only ASCII characters, but if you've put localized
+  (non-English) texts (e.g. German umlauts) into your properties files, you need
+  to convert them to UTF-8. Properties files created with the FlatLaf Theme
+  Editor already use UTF-8, including in older versions. (issue #1031)
+
+
+## 3.6.1
+
+- Extras: Support JSVG 2.0.0. Minimum JSVG version is now 1.6.0. (issue #997)
+- FlatLaf window decorations (Windows 10/11 only): Improved diagonal window
+  resizing on top-left and top-right window corners. Top window resize area now
+  also covers iconify/maximize/close buttons. (issue #1015)
+- ToggleButton: Styling `selectedForeground` did not work if `foreground` is
+  also styled. (issue #1017)
+- JideSplitButton: Fixed updating popup when switching theme. (issue #1000)
+- IntelliJ Themes: Fixed logging false errors when loading 3rd party
+  `.theme.json` files. (issue #990)
+- Linux: Popups appeared in wrong position on multi-screen setup if primary
+  display is located below or right to secondary display. (see
+  [NetBeans issue #8532](https://github.com/apache/netbeans/issues/8532))
+- macOS: Fixed popup flickering after theme change. (issue #1009)
+- macOS with JetBrains Runtime: Fixed sometimes empty popups. (issue #1019)
+
+
+## 3.6
+
+#### New features and improvements
+
+- macOS: Re-enabled rounded popup border (see PR #772) on macOS 14.4+ (was
+  disabled in 3.5.x).
+- Increased contrast of text for better readability: (PR #972; issue #762)
+  - In **FlatLaf Dark**, **FlatLaf Darcula** and many dark IntelliJ themes, made
+    all text colors brighter.
+  - In **FlatLaf Light**, **FlatLaf IntelliJ** and many light IntelliJ themes,
+    made disabled text colors slightly darker.
+  - In **FlatLaf macOS Light**, made disabled text colors darker.
+  - In **FlatLaf macOS Dark**, made text colors of "default" button and selected
+    ToggleButton lighter.
+- CheckBox: Support styling indeterminate state of
+  [tri-state check boxes](https://www.javadoc.io/doc/com.formdev/flatlaf-extras/latest/com/formdev/flatlaf/extras/components/FlatTriStateCheckBox.html).
+  (PR #936; issue #919)
+- List: Support for alternate row highlighting. (PR #939)
+- Tree: Support for alternate row highlighting. (PR #903)
+- Tree: Support wide cell renderer. (issue #922)
+- ScrollBar: Use rounded thumb also on Windows (as on macOS and Linux) and made
+  thumb slightly darker/lighter. (issue #918)
+- Extras: `FlatSVGIcon` color filters now can access painting component to
+  implement component state based color mappings. (issue #906)
+- Linux:
+  - Rounded iconify/maximize/close buttons if using FlatLaf window decorations.
+    (PR #971)
+  - Added `libflatlaf-linux-arm64.so` for Linux on ARM64. (issue #899)
+  - Use X11 window manager events to resize window, if FlatLaf window
+    decorations are enabled. This gives FlatLaf windows a more "native" feeling.
+    (issue #866)
+- IntelliJ Themes:
+  - Updated to latest versions and fixed various issues.
+  - Support customizing through properties files. (issue #824)
+- SwingX: Support `JXTipOfTheDay` component. (issue #980)
+- Support key prefixes for Linux desktop environments (e.g. `[gnome]`, `[kde]`
+  or `[xfce]`) in properties files. (issue #974)
+- Support custom key prefixes (e.g. `[win10]` or `[test]`) in properties files.
+  (issue #649)
+- Support multi-prefixed keys (e.g. `[dark][gnome]TitlePane.buttonBackground`).
+  The value is only used if all prefixes match current platform/theme.
+- Support new component border color to indicate success state (set client
+  property `JComponent.outline` to `success`). (PR #982, issue #945)
+- Fonts: Updated **Inter** to
+  [v4.1](https://github.com/rsms/inter/releases/tag/v4.1).
+
+#### Fixed bugs
+
+- Button: Fixed background and foreground colors for `borderless` and
+  `toolBarButton` style default buttons (`JButton.isDefaultButton()` is `true`).
+  (issue #947)
+- FileChooser: Improved performance when navigating to large directories with
+  thousands of files. (issue #953)
+- PopupFactory: Fixed NPE on Windows 10 when `owner` is `null`. (issue #952)
+- Popup: On Windows 10, drop shadow of heavy-weight popup was not updated if
+  popup moved/resized. (issue #942)
+- FlatLaf window decorations:
+  - Minimize and maximize icons were not shown for custom scale factors less
+    than 100% (e.g. `-Dflatlaf.uiScale=75%`). (issue #951)
+  - Linux: Fixed occasional maximizing of window when single-clicking the
+    window's title bar. (issue #637)
+- Styling: MigLayout visual padding was not updated after applying style to
+  Button, ComboBox, Spinner, TextField (and subclasses) and ToggleButton. (issue
+  #965)
+- Linux: Popups (menus and combobox lists) were not hidden when window is moved,
+  resized, maximized, restored, iconified or switched to another window. (issue
+  #962)
+- Fixed loading FlatLaf UI delegate classes when using FlatLaf in special
+  application where multiple class loaders are involved. E.g. in Eclipse plugin
+  or in LibreOffice extension. (issues #955 and #851)
+- HTML: Fixed rendering of `<hr noshade>` in dark themes. (issue #932)
+- TextComponents: `selectAllOnFocusPolicy` related changes:
+  - No longer select all text if selection (or caret position) was changed by
+    application and `selectAllOnFocusPolicy` is `once` (the default). (issue
+    #983)
+  - FormattedTextField and Spinner: `selectAllOnFocusPolicy = once` behaves now
+    as `always` (was `never` before), which means that all text is selected when
+    component gains focus. This is because of special behavior of
+    `JFormattedTextField` that did not allow implementation of `once`.
+  - Client property `JTextField.selectAllOnFocusPolicy` now also works on
+    (editable) `JComboBox` and on `JSpinner`.
+  - Added client property `JTextField.selectAllOnMouseClick` to override UI
+    property `TextComponent.selectAllOnMouseClick`. (issue #961)
+  - For `selectAllOnMouseClick = true`, clicking with the mouse into the text
+    field, to focus it, now always selects all text, even if
+    `selectAllOnFocusPolicy` is `once`.
+
+#### Incompatibilities
+
+- IntelliJ Themes:
+  - Theme prefix in `IntelliJTheme$ThemeLaf.properties` changed from
+    `[theme-name]` to `{theme-name}`.
+  - Renamed classes in package
+    `com.formdev.flatlaf.intellijthemes.materialthemeuilite` from `Flat<theme>`
+    to `FlatMT<theme>`.
+  - Removed `Gruvbox Dark Medium` and `Gruvbox Dark Soft` themes.
+- Prefixed keys in properties files (e.g. `[dark]Button.background` or
+  `[win]Button.arc`) are now handled earlier than before. In previous versions,
+  prefixed keys always had higher priority than unprefixed keys and did always
+  overwrite unprefixed keys. Now prefixed keys are handled in same order as
+  unprefixed keys, which means that if a key is prefixed and unprefixed (e.g.
+  `[win]Button.arc` and `Button.arc`), the one which is last specified in
+  properties file is used.\
+  Following worked in previous versions, but now `Button.arc` is always `6`:
+  ~~~properties
+  [win]Button.arc = 12
+  Button.arc = 6
+  ~~~
+  This works in new (and old) versions:
+  ~~~properties
+  Button.arc = 6
+  [win]Button.arc = 12
+  ~~~
+
+
+## 3.5.4
+
+#### Fixed bugs
+
+- HTML: Fixed NPE when using HTML text on a component with `null` font. (issue
+  #930; PR #931; regression in 3.5)
+- Linux: Fixed NPE when using FlatLaf window decorations and switching theme.
+  (issue #933; regression in 3.5.3)
+
+
+## 3.5.3
+
+#### Fixed bugs
+
+- HTML: Fixed wrong rendering if HTML text contains `<style>` tag with
+  attributes (e.g. `<style type='text/css'>`). (issue #905; regression in 3.5.1)
+- FlatLaf window decorations:
+  - Windows: Fixed possible deadlock with TabbedPane in window title area in
+    "full window content" mode. (issue #909)
+  - Windows: Fixed wrong layout in maximized frame after changing screen scale
+    factor. (issue #904)
+  - Linux: Fixed continuous cursor toggling between resize and standard cursor
+    when resizing window. (issue #907)
+  - Fixed sometimes broken window moving with SplitPane in window title area in
+    "full window content" mode. (issue #926)
+- Popup: On Windows 10, fixed misplaced popup drop shadow. (issue #911;
+  regression in 3.5)
+- Popup: Fixed NPE if `GraphicsConfiguration` is `null` on Windows. (issue #921)
+- Theme Editor: Fixed using color picker on secondary screen.
+- Fixed detection of Windows 11 if custom exe launcher does not specify Windows
+  10+ compatibility in application manifest. (issue #916)
+- Linux: Fixed slightly different font size (or letter width) used to paint HTML
+  text when default font family is _Cantarell_ (e.g. on Fedora). (issue #912)
+
+#### Other Changes
+
+- Class `FlatPropertiesLaf` now supports FlatLaf macOS themes as base themes.
+
+
+## 3.5.2
+
+#### Fixed bugs
+
+- Windows: Fixed repaint issues (ghosting) on some systems (probably depending
+  on graphics card/driver). This is done by setting Java system property
+  `sun.java2d.d3d.onscreen` to `false` (but only if `sun.java2d.d3d.onscreen`,
+  `sun.java2d.d3d` and `sun.java2d.noddraw` are not yet set), which disables
+  usage of Windows Direct3D (DirectX) onscreen surfaces. Component rendering
+  still uses Direct3D. (issue #887)
+- FlatLaf window decorations:
+  - Iconify/maximize/close buttons did not fill whole title bar height, if some
+    custom component in menu bar increases title bar height. (issue #897)
+  - Windows: Fixed possible application freeze when using custom component that
+    overrides `Component.contains(int x, int y)` and invokes
+    `SwingUtilities.convertPoint()` (or similar) from the overridden method.
+    (issue #878)
+- TextComponents: Fixed too fast scrolling in multi-line text components when
+  using touchpads (e.g. on macOS). (issue #892)
+- ToolBar: Fixed endless loop if button in Toolbar has focus and is made
+  invisible. (issue #884)
+
+#### Other Changes
+
+- FlatLaf window decorations: Added client property `JRootPane.titleBarHeight`
+  to allow specifying a (larger) preferred height for the title bar. (issue
+  #897)
+- Added system property `flatlaf.useRoundedPopupBorder` to allow disabling
+  native rounded popup borders on Windows 11 and macOS. On macOS 14.4+, where
+  rounded popup borders are disabled since FlatLaf 3.5 because of occasional
+  problems, you can use this to enable rounded popup borders (at your risk).
+
+
+## 3.5.1
+
+#### Fixed bugs
+
+- HTML: Fixed occasional cutoff wrapped text when using multi-line text in HTML
+  tags `<h1>`...`<h6>`, `<code>`, `<kbd>`, `<big>`, `<small>` or `<samp>`.
+  (issue #873; regression in 3.5)
+- Popup: Fixed `UnsupportedOperationException: PERPIXEL_TRANSLUCENT translucency
+  is not supported` exception on Haiku OS when showing popup (partly) outside of
+  window. (issue #869)
+- HiDPI: Fixed occasional wrong repaint areas when using
+  `HiDPIUtils.installHiDPIRepaintManager()`. (see PR #864)
+- Added system property `flatlaf.useSubMenuSafeTriangle` to allow disabling
+  submenu safe triangle (PR #490) for
+  [SWTSwing](https://github.com/Chrriis/SWTSwing). (issue #870)
+
+
+## 3.5
+
+#### New features and improvements
+
+- Table: Support rounded selection. (PR #856)
+- Button and ToggleButton: Added border colors for pressed and selected states.
+  (issue #848)
+- Label: Support painting background with rounded corners. (issue #842)
+- Popup: Fixed flicker of popups (e.g. tooltips) while they are moving (e.g.
+  following mouse pointer). (issues #832 and #672)
+- FileChooser: Wrap shortcuts in scroll pane. (issue #828)
+- Theme Editor: On macOS, use larger window title bar. (PR #779)
+
+#### Fixed bugs
+
+- macOS: Disabled rounded popup border (see PR #772) on macOS 14.4+ because it
+  may freeze the application and crash the macOS WindowServer process (reports
+  vary from Finder restarts to OS restarts). This is a temporary change until a
+  solution is found. See NetBeans issues
+  [apache/netbeans#7560](https://github.com/apache/netbeans/issues/7560#issuecomment-2226439215)
+  and
+  [apache/netbeans#6647](https://github.com/apache/netbeans/issues/6647#issuecomment-2070124442).
+- FlatLaf window decorations: Window top border on Windows 10 in "full window
+  content" mode was not fully repainted when activating or deactivating window.
+  (issue #809)
+- Button and ToggleButton: UI properties `[Toggle]Button.selectedForeground` and
+  `[Toggle]Button.pressedForeground` did not work for HTML text. (issue #848)
+- HTML: Fixed font sizes for HTML tags `<h1>`...`<h6>`, `<code>`, `<kbd>`,
+  `<big>`, `<small>` and `<samp>` in HTML text for components Button, CheckBox,
+  RadioButton, MenuItem (and subclasses), JideLabel, JideButton, JXBusyLabel and
+  JXHyperlink. Also fixed for Label and ToolTip if using Java 11+.
+- ScrollPane: Fixed/improved border painting at 125% - 175% scaling to avoid
+  different border thicknesses. (issue #743)
+- Table: Fixed painting of alternating rows below table if auto-resize mode is
+  `JTable.AUTO_RESIZE_OFF` and table width is smaller than scroll pane (was not
+  updated when table width changed and was painted on wrong side in
+  right-to-left component orientation).
+- Theme Editor: Fixed occasional empty window on startup on macOS.
+- FlatLaf window decorations: Fixed black line sometimes painted on top of
+  (native) window border on Windows 11. (issue #852)
+- HiDPI: Fixed incomplete component paintings at 125% or 175% scaling on Windows
+  where sometimes a 1px wide area at the right or bottom component edge is not
+  repainted. E.g. ScrollPane focus indicator border. (issues #860 and #582)
+
+#### Incompatibilities
+
+- ProgressBar: Log warning (including stack trace) when uninstalling
+  indeterminate progress bar UI or using `JProgressBar.setIndeterminate(false)`
+  not on AWT thread, because this may throw NPE in `FlatProgressBarUI.paint()`.
+  (issues #841 and #830)
+- Panel: Rounded background of panel with rounded corners is now painted even if
+  panel is not opaque. (issue #840)
+
+
+## 3.4.1
+
+#### Fixed bugs
+
+- SplitPane: Update divider when client property `JSplitPane.expandableSide`
+  changed.
+- TabbedPane: Fixed swapped back and forward scroll buttons when using
+  `TabbedPane.scrollButtonsPlacement = trailing` (regression in FlatLaf 3.3).
+- Fixed missing window top border on Windows 10 in "full window content" mode.
+  (issue #809)
+- Extras:
+  - `FlatSVGIcon` color filters now support linear gradients. (PR #817)
+  - `FlatSVGIcon`: Use log level `CONFIG` instead of `SEVERE` and allow
+    disabling logging. (issue #823)
+  - Added support for `JSplitPane.expandableSide` client property to
+    `FlatSplitPane`.
+- Native libraries: Added API version check to test whether native library
+  matches the JAR (bad builds could e.g. ship a newer JAR with an older
+  incompatible native library) and to test whether native methods can be invoked
+  (some security software allows loading native library but blocks method
+  invocation).
+- macOS: Fixed crash when running in WebSwing. (issue #826; regression in 3.4)
+
+#### Incompatibilities
+
+- File names of custom properties files for nested Laf classes now must include
+  name of enclosing class name. E.g. nested Laf class `IntelliJTheme.ThemeLaf`
+  used `ThemeLaf.properties` in previous versions, but now needs to be named
+  `IntelliJTheme$ThemeLaf.properties`.
+
+
+## 3.4
+
+#### New features and improvements
+
+- FlatLaf window decorations (Windows 10/11 and Linux): Support "full window
+  content" mode, which allows you to extend the content into the window title
+  bar. (PR #801)
+- macOS: Support larger window title bar close/minimize/zoom buttons spacing in
+  [full window content](https://www.formdev.com/flatlaf/macos/#full_window_content)
+  mode and introduced "buttons placeholder". (PR #779)
+- Native libraries:
+  - System property `flatlaf.nativeLibraryPath` now supports loading native
+    libraries named the same as on Maven central.
+  - Published `flatlaf-<version>-no-natives.jar` to Maven Central. This JAR is
+    equal to `flatlaf-<version>.jar`, except that it does not contain the
+    FlatLaf native libraries. The Maven "classifier" to use this JAR is
+    `no-natives`. You need to distribute the FlatLaf native libraries with your
+    application.
+    See https://www.formdev.com/flatlaf/native-libraries/ for more details.
+  - Improved log messages for loading fails.
+- Fonts: Updated **Inter** to
+  [v4.0](https://github.com/rsms/inter/releases/tag/v4.0).
+- Table: Select all text in cell editor when starting editing using `F2` key on
+  Windows or Linux. (issue #652)
+
+#### Fixed bugs
+
+- macOS: Setting window background (of undecorated window) to translucent color
+  (alpha < 255) did not show the window translucent. (issue #705)
+- JIDE CommandMenuBar: Fixed `ClassCastException` when JIDE command bar displays
+  `JideMenu` in popup. (PR #794)
+
+
+## 3.3
+
+#### New features and improvements
+
+- macOS (10.14+): Popups (`JPopupMenu`, `JComboBox`, `JToolTip`, etc.) now use
+  native macOS rounded borders. (PR #772; issue #715)
+- Native libraries: Added `libflatlaf-macos-arm64.dylib` and
+  `libflatlaf-macos-x86_64.dylib`. See also
+  https://www.formdev.com/flatlaf/native-libraries/.
+- ScrollPane: Support rounded border. (PR #713)
+- SplitPane: Support divider hover and pressed background colors. (PR #788)
+- TabbedPane: Support vertical tabs. (PR #758, issue #633)
+- TabbedPane: Paint rounded tab area background for rounded cards. (issue #717)
+- ToolBar: Added styling properties `separatorWidth` and `separatorColor`.
+
+#### Fixed bugs
+
+- Button and ToggleButton: Selected buttons did not use explicitly set
+  foreground color. (issue #756)
+- FileChooser: Catch NPE in Java 21 when getting icon for `.exe` files that use
+  default Windows exe icon. (see
+  [JDK-8320692](https://bugs.openjdk.org/browse/JDK-8320692))
+- OptionPane: Fixed styling custom panel background in `JOptionPane`. (issue
+  #761)
+- ScrollPane: Styling ScrollPane border properties did not work if view
+  component is a Table.
+- Table:
+  - Switching theme looses table grid and intercell spacing. (issues #733 and
+    #750)
+  - Fixed background of `boolean` columns when using alternating row colors.
+    (issue #780)
+  - Fixed border arc of components in complex table cell editors. (issue #786)
+- TableHeader:
+  - No longer temporary replace header cell renderer while painting. This avoids
+    a `StackOverflowError` in case that custom renderer does this too. (see
+    [NetBeans issue #6835](https://github.com/apache/netbeans/issues/6835)) This
+    also improves compatibility with custom table header implementations.
+  - Header cell renderer background/foreground colors were not restored after
+    hover if renderer uses `null` for background/foreground. (PR #790)
+- TabbedPane:
+  - Avoid unnecessary repainting whole tabbed pane content area when layouting
+    leading/trailing components.
+  - Avoid unnecessary repainting of selected tab on temporary changes.
+  - Fixed "endless" layouting and repainting when using nested tabbed panes (top
+    and bottom tab placement) and RSyntaxTextArea (with enabled line-wrapping)
+    as tab content. (see
+    [jadx issue #2030](https://github.com/skylot/jadx/issues/2030))
+- Fixed broken rendering after resizing window to minimum size and then
+  increasing size again. (issue #767)
+
+#### Incompatibilities
+
+- Removed support for JetBrains custom decorations, which required
+  [JetBrains Runtime](https://github.com/JetBrains/JetBrainsRuntime/wiki) (JBR)
+  8 or 11. It did not work for JBR 17. System property
+  `flatlaf.useJetBrainsCustomDecorations` is now ignored. **Note**: FlatLaf
+  window decorations continue to work with JBR.
+
+
+## 3.2.5
+
+#### Fixed bugs
+
+- Popup: Fixed NPE if popup invoker is `null` on Windows 10. (issue #753;
+  regression in 3.2.1 in fix for #626)
+
+
+## 3.2.4
+
+#### Fixed bugs
+
+- Popup: Fixed NPE if popup invoker is `null` on Linux with Wayland and Java 21.
+  (issue #752; regression in 3.2.3)
+
+
+## 3.2.3
+
+#### Fixed bugs
+
+- Popup: Popups that request focus were not shown on Linux with Wayland and Java 21.
+  (issue #752)
+
+
+## 3.2.2
+
+#### Fixed bugs
+
+- Button: Fixed painting icon and text at wrong location when using HTML text,
+  left/right vertical alignment and running in Java 19+. (issue #746)
+- CheckBox and RadioButton: Fixed cut off right side when border is removed and
+  horizontal alignment is set to `right`. (issue #734)
+- TabbedPane: Fixed NPE when using focusable component as tab component and
+  switching theme. (issue #745)
+
+
+## 3.2.1
+
+#### Fixed bugs
+
+- Fixed memory leak in
+  `MultiResolutionImageSupport.create(int,Dimension[],Function<Dimension,Image>)`,
+  which caches images created by the producer function. Used by
+  `FlatSVGIcon.getImage()` and `FlatSVGUtils.createWindowIconImages()`. If you
+  use one of these methods, it is **strongly recommended** to upgrade to this
+  version, because if the returned image is larger and painted very often it may
+  result in an out-of-memory situation. (issue #726)
+- FileChooser: Fixed occasional NPE in `FlatShortcutsPanel` on Windows. (issue
+  #718)
+- TextField: Fixed placeholder text painting, which did not respect horizontal
+  alignment property of `JTextField`. (issue #721)
+- Popup: Fixed drop shadow if popup overlaps a heavyweight component. (Windows
+  10 only; issue #626)
+
+
+## 3.2
+
+#### New features and improvements
+
+- TabbedPane: Support rounded underline selection and rounded card tabs. (PR
+  #703)
+- FlatLaf window decorations:
+  - Support for Windows on ARM 64-bit. (issue #443, PR #707)
+  - Support toolbox-style "small" window title bar. (issue #659, PR #702)
+- Extras: Class `FlatSVGIcon` now uses [JSVG](https://github.com/weisJ/jsvg)
+  library (instead of svgSalamander) for rendering. JSVG provides improved SVG
+  rendering and uses less memory compared to svgSalamander. (PR #684)
+- ComboBox: Improved location of selected item in popup if list is large and
+  scrollable.
+- FileChooser: Show localized text for all locales supported by Java's Metal
+  look and feel. (issue #680)
+- Added system property `flatlaf.useNativeLibrary` to allow disabling loading of
+  FlatLaf native library. (issue #674)
+- IntelliJ Themes:
+  - Reduced memory footprint by releasing Json data and ignoring IntelliJ UI
+    properties that are not used in FlatLaf.
+  - Updated "Hiberbee Dark" and "Gradianto" themes.
+
+#### Fixed bugs
+
+- Styling: Fixed scaling of some styling properties (`rowHeight` for Table and
+  Tree; `iconTextGap` for Button, CheckBox and RadioButton). (issue #682)
+- Fixed `IllegalComponentStateException` when invoker is not showing in
+  `SubMenuUsabilityHelper`. (issue #692)
+- macOS themes: Changing `@accentColor` variable in FlatLaf properties files did
+  not change all accent related colors for all components.
+- IntelliJ Themes:
+  - "Light Owl" theme: Fixed wrong (unreadable) text color in selected menu
+    items, selected text in text components, and selection in ComboBox popup
+    list. (issue #687)
+  - "Gradianto Midnight Blue" theme: Fixed color of ScrollBar track, which was
+    not visible. (issue #686)
+  - "Monocai" theme: Fixed unreadable text color of default buttons. (issue
+    #693)
+  - "Vuesion" theme: Fixed foreground colors of disabled text.
+  - "Material UI Lite" themes: Fixed non-editable ComboBox button background.
+  - CheckBox and RadioButton: Fixed unselected icon colors for themes "Atom One
+    Light", "Cyan Light", "GitHub", "Light Owl", "Material Lighter" and
+    "Solarized Light".
+  - TabbedPane: Fixed focused tab background color for themes "Arc *", "Material
+    Design Dark", "Monocai", "One Dark", "Spacegray" and "Xcode-Dark". (issue
+    #697)
+  - TextComponents, ComboBox and Spinner: Fixed background colors of enabled
+    text components, to distinguish from disabled, for themes "Carbon", "Cobalt
+    2", "Gradianto *", "Gruvbox *", "Monocai", "Spacegray", "Vuesion",
+    "Xcode-Dark", "GitHub", and "Light Owl". (issue #528)
+  - Fixed wrong disabled text colors in "Dark Flat", "Hiberbee Dark", "Light
+    Flat", "Nord", "Solarized Dark" and "Solarized Light" themes.
+  - Fixed colors for selection background/foreground, Separator, Slider track
+    and ProgressBar background in various themes.
+- Native Windows libraries: Fixed crash when running in Java 8 and newer Java
+  version is installed in `PATH` environment variable and using class
+  `SystemInfo` before AWT initialization. (issue #673)
+- ComboBox: Fixed search in item list for text with spaces. (issue #691)
+- FormattedTextField: On Linux, fixed `IllegalArgumentException: Invalid
+  location` if `JFormattedTextField.setDocument()` is invoked in a focus gained
+  listener on that formatted text field. (issue #698)
+- PopupMenu: Make sure that popup menu does not overlap any operating system
+  task bar. (issue #701)
+- FileChooser: Use system icons on Windows with Java 17.0.3 (and later) 32-bit.
+  Only Java 17 - 17.0.2 32-bit do not use system icons because of a bug in Java
+  32-bit that crashes the application. (PR #709)
+- FileChooser: Fixed crash on Windows with Java 17 to 17.0.2 32-bit. Java 17
+  64-bit is not affected. (regression since FlatLaf 2.3; PR #522, see also issue
+  #403)
+
+#### Incompatibilities
+
+- Extras: Class `FlatSVGIcon` now uses [JSVG](https://github.com/weisJ/jsvg)
+  library for SVG rendering. You need to replace svgSalamander with JSVG in your
+  build scripts and distribute `jsvg.jar` with your application. Also replace
+  `com.kitfox.svg` with `com.github.weisj.jsvg` in `module-info.java` files.
+- IntelliJ Themes: Removed all "Contrast" themes from "Material UI Lite".
+
+
 ## 3.1.1
 
 - IntelliJ Themes:
@@ -43,7 +635,6 @@ FlatLaf Change Log
   - Windows DLLs are now digitally signed with FormDev Software GmbH
     certificate.
 
-
 #### Fixed bugs
 
 - FlatLaf window decorations:
@@ -579,7 +1170,7 @@ FlatLaf Change Log
 - Native window decorations (Windows 10 only):
   - Fixed occasional application crash in `flatlaf-windows.dll`. (issue #357)
   - When window is initially shown, fill background with window background color
-    (instead of white), which avoids flickering in dark themes. (issue 339)
+    (instead of white), which avoids flickering in dark themes. (issue #339)
   - When resizing a window at the right/bottom edge, then first fill the new
     space with the window background color (instead of black) before the layout
     is updated.

README.md

@@ -6,7 +6,7 @@ Swing desktop applications.
 
 It looks almost flat (no shadows or gradients), clean, simple and elegant.
 FlatLaf comes with **Light**, **Dark**, **IntelliJ** and **Darcula** themes,
-scales on **HiDPI** displays and runs on Java 8 or newer.
+scales on **HiDPI** displays and runs on Java 8 or newer (LTS and latest).
 
 The look is heavily inspired by **Darcula** and **IntelliJ** themes from
 IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.
@@ -33,14 +33,24 @@ FlatLaf can use 3rd party themes created for IntelliJ Platform (see
 Sponsors
 --------
 
+### Current Sponsors
+
+<a href="https://www.soptim.de/"><img src="https://www.formdev.com/flatlaf/sponsor/soptim.svg" width="200" alt="SOPTIM" title="SOPTIM - your expert in software solutions for the energy industry"></a>
+&nbsp; &nbsp; &nbsp; &nbsp;
+<a href="https://exocharts.com/"><img src="https://www.formdev.com/flatlaf/sponsor/Exocharts.png" width="200" alt="Exocharts" title="Exocharts - Professional Grade OrderFlow"></a>
+
+<!-- [![None Sponsors](images/none-sponsors.png)](https://www.formdev.com/flatlaf/sponsor/) -->
+
+[Become a Sponsor](https://www.formdev.com/flatlaf/sponsor/)
+
+### Previous Sponsors
+
 <a href="https://www.ej-technologies.com/"><img src="https://www.formdev.com/flatlaf/sponsor/ej-technologies.png" width="200" alt="ej-technologies" title="ej-technologies - Java APM, Java Profiler, Java Installer Builder"></a>
 &nbsp; &nbsp; &nbsp; &nbsp;
 <a href="https://www.dbvis.com/"><img src="https://www.formdev.com/flatlaf/sponsor/dbvisualizer.svg" width="200" alt="DbVisualizer" title="DbVisualizer - SQL Client and Editor"></a>
 &nbsp; &nbsp; &nbsp; &nbsp;
 <a href="https://www.dscsag.com/"><img src="https://www.formdev.com/flatlaf/sponsor/DSC.png" height="48" alt="DSC Software AG" title="DSC Software AG - Your Companion for Integrative PLM"></a>
 
-[Become a Sponsor](https://www.formdev.com/flatlaf/sponsor/)
-
 Demo
 ----
 
@@ -62,9 +72,9 @@ build script:
     artifactId:  flatlaf
     version:     (see button below)
 
-Otherwise download `flatlaf-<version>.jar` here:
+Otherwise, download `flatlaf-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf)
 
 See also
 [Native Libraries distribution](https://www.formdev.com/flatlaf/native-libraries/)
@@ -75,10 +85,10 @@ application.
 ### Snapshots
 
 FlatLaf snapshot binaries are available on
-[Sonatype OSSRH](https://oss.sonatype.org/content/repositories/snapshots/com/formdev/flatlaf/).
+[Sonatype Central](https://central.sonatype.com/service/rest/repository/browse/maven-snapshots/com/formdev/flatlaf/).
 To access the latest snapshot, change the FlatLaf version in your dependencies
-to `<version>-SNAPSHOT` (e.g. `0.27-SNAPSHOT`) and add the repository
-`https://oss.sonatype.org/content/repositories/snapshots/` to your build (see
+to `<version>-SNAPSHOT` (e.g. `3.7-SNAPSHOT`) and add the repository
+`https://central.sonatype.com/repository/maven-snapshots/` to your build (see
 [Maven](https://maven.apache.org/guides/mini/guide-multiple-repositories.html)
 and
 [Gradle](https://docs.gradle.org/current/userguide/declaring_repositories.html#sec:declaring_custom_repository)
@@ -141,7 +151,7 @@ details and downloads.
 Buzz
 ----
 
-- [What others say about FlatLaf on Twitter](https://twitter.com/search?f=live&q=flatlaf)
+- [FlatLaf 3.1 (and 3.0) announcement on Reddit](https://www.reddit.com/r/java/comments/12xgrsu/flatlaf_31_and_30_swing_look_and_feel/)
 - [FlatLaf 1.0 announcement on Reddit](https://www.reddit.com/r/java/comments/lsbcwe/flatlaf_10_swing_look_and_feel/)
 - [FlatLaf announcement on Reddit](https://www.reddit.com/r/java/comments/dl0hu3/flatlaf_flat_look_and_feel/)
 
@@ -149,121 +159,231 @@ Buzz
 Applications using FlatLaf
 --------------------------
 
-- ![New](images/new.svg)
+### Featured
+
+- ![Sponsor](images/sponsor.svg) [JFormDesigner](https://www.formdev.com/)
+  (**commercial**) - Java/Swing GUI Designer (from the FlatLaf creators)
+- ![Sponsor](images/sponsor.svg)
   [JProfiler](https://www.ej-technologies.com/products/jprofiler/overview.html)
-  12 (**commercial**) - the award-winning all-in-one Java profiler
-- ![New](images/new.svg) [JFormDesigner](https://www.formdev.com/) 8
-  (**commercial**) - Java/Swing GUI Designer
-- ![New](images/new.svg) [Jeyla Studio](https://www.jeylastudio.com/) - Salon
-  Software
-- ![New](images/new.svg) [Fanurio](https://www.fanuriotimetracking.com/) 3.3.2
-  (**commercial**) - time tracking and billing for freelancers and teams
-- ![New](images/new.svg) [Antares](https://www.antarescircuit.io/) - a free,
-  powerful platform for designing, simulating and explaining digital circuits
-- ![New](images/new.svg)
-  [Logisim-evolution](https://github.com/logisim-evolution/logisim-evolution)
-  3.6 - Digital logic design tool and simulator
-- ![New](images/new.svg) [Cinecred](https://loadingbyte.com/cinecred/) - create
-  beautiful film credit sequences
-- ![New](images/new.svg) [tinyMediaManager](https://www.tinymediamanager.org/)
-  v4 (**commercial**) - a media management tool
-- ![New](images/new.svg) [Weasis](https://nroduit.github.io/) - medical DICOM
-  viewer used in healthcare by hospitals, health networks, etc
-- ![New](images/new.svg)
-  [Makelangelo Software](https://github.com/MarginallyClever/Makelangelo-software)
-  7.3.0 - for plotters, especially the wall-hanging polargraph
-- ![Hot](images/hot.svg) [Ultorg](https://www.ultorg.com/) (**commercial**) - a
-  visual query system for relational databases
-- [MooInfo](https://github.com/rememberber/MooInfo) - visual implementation of
-  OSHI, to view information about the system and hardware
-- [Jailer](https://github.com/Wisser/Jailer) 11.2 - database subsetting and
-  relational data browsing tool
-- ![Hot](images/hot.svg) [Apache NetBeans](https://netbeans.apache.org/) 11.3 -
-  IDE for Java, PHP, HTML and much more
-- [jclasslib bytecode viewer](https://github.com/ingokegel/jclasslib) 5.5
-- [KeyStore Explorer](https://keystore-explorer.org/) 5.4.3
-- ![Hot](images/hot.svg)
+  (**commercial**) - the award-winning all-in-one Java profiler
+- ![Sponsor](images/sponsor.svg)
   [install4j](https://www.ej-technologies.com/products/install4j/overview.html)
-  9.0 (**commercial**) - the powerful multi-platform Java installer builder
-- ![Hot](images/hot.svg) [DbVisualizer](https://www.dbvis.com/) 12.0
+  (**commercial**) - the powerful multi-platform Java installer builder
+- ![Sponsor](images/sponsor.svg) [DbVisualizer](https://www.dbvis.com/)
   (**commercial**) - the universal database tool for developers, analysts and
   DBAs
-- ![Hot](images/hot.svg) [MagicPlot](https://magicplot.com/) 3.0
-  (**commercial**) - Software for nonlinear fitting, plotting and data analysis
-- ![Hot](images/hot.svg)
-  [Thermo-Calc](https://thermocalc.com/products/thermo-calc/) 2021a
-  (**commercial**) - Thermodynamics and Properties Software
-- ![Hot](images/hot.svg) [OWASP ZAP](https://www.zaproxy.org/) 2.10 - the worlds
-  most widely used web app scanner
+- ![Hot](images/hot.svg) [Apache NetBeans](https://netbeans.apache.org/) - IDE
+  for Java, PHP, HTML and much more
+- ![Sponsor](images/sponsor.svg)
+  [Thermo-Calc](https://thermocalc.com/products/thermo-calc/) (**commercial**) -
+  Thermodynamics and Properties Software
+
+### Data
+
+- ![Hot](images/hot.svg) [Ultorg](https://www.ultorg.com/) (**commercial**) - a
+  visual query system for relational databases
+- [Jailer](https://github.com/Wisser/Jailer) - database subsetting and
+  relational data browsing tool
+- ![Hot](images/hot.svg) [MagicPlot](https://magicplot.com/) (**commercial**) -
+  Software for nonlinear fitting, plotting and data analysis
+- [Constellation](https://www.constellation-app.com/) - Data Visualization and
+  Analytics (based on NetBeans platform)
+- [Kafka Visualizer](https://github.com/kumait/kafkavisualizer) - Kafka GUI
+  client
+- ![New](images/new.svg)
+  [RedisFront](https://github.com/dromara/RedisFront/blob/master/README_EN.md) -
+  Cross-platform redis GUI
+- ![New](images/new.svg)
+  [Zettelkasten](https://github.com/Zettelkasten-Team/Zettelkasten) - knowledge
+  management tool
+- ![New](images/new.svg) [QStudio](https://www.timestored.com/qstudio/) - free
+  SQL editor
+
+### Security
+
+- ![Hot](images/hot.svg) [ZAP](https://www.zaproxy.org/) - the world's most
+  widely used web app scanner
 - ![Hot](images/hot.svg)
   [Burp Suite Professional and Community Edition](https://portswigger.net/burp/pro)
-  2020.11.2 (**commercial**) - the leading software for web security testing
+  (**commercial**) - the leading software for web security testing
+- [Ghidra](https://github.com/NationalSecurityAgency/ghidra) - a software
+  reverse engineering (SRE) framework
+- [jadx](https://github.com/skylot/jadx) - Dex to Java decompiler
 - [BurpCustomizer](https://github.com/CoreyD97/BurpCustomizer) - adds more
   FlatLaf themes to Burp Suite
+- [Total Validator](https://www.totalvalidator.com/) (**commercial**) - checks
+  your website
+- [JPass](https://github.com/gaborbata/jpass) - password manager with strong
+  encryption
+
+### Software Development
+
+- [jclasslib bytecode viewer](https://github.com/ingokegel/jclasslib)
+- [KeyStore Explorer](https://keystore-explorer.org/)
+- [muCommander](https://github.com/mucommander/mucommander) - lightweight
+  cross-platform file manager
+- [Guiffy](https://www.guiffy.com/) (**commercial**) - advanced cross-platform
+  Diff/Merge
+- [HashGarten](https://github.com/jonelo/HashGarten) - cross-platform Swing GUI
+  for Jacksum
+- [Pseudo Assembler IDE](https://github.com/tomasz-herman/PseudoAssemblerIDE) -
+  IDE for Pseudo-Assembler
+- [Linotte](https://github.com/cpc6128/LangageLinotte) - French programming
+  language created to learn programming
+- [lsfusion platform](https://github.com/lsfusion/platform) - information
+  systems development platform
+- ![New](images/new.svg) [Consulo](https://github.com/consulo/consulo) - open
+  source cross-platform multi-language IDE (Java, .NET, JS, etc)
+- [Convertigo](https://github.com/convertigo/convertigo) - low code & no code
+  mobile & web platform
+- ![New](images/new.svg) [EduMIPS64](https://github.com/EduMIPS64/edumips64) -
+  visual MIPS64 CPU simulator
+- ![New](images/new.svg) [Launch4j](https://launch4j.sourceforge.net/) -
+  cross-platform Java executable wrapper
+
+### Electrical
+
+- [Antares](https://www.antarescircuit.io/) - a free, powerful platform for
+  designing, simulating and explaining digital circuits
+- [Logisim-evolution](https://github.com/logisim-evolution/logisim-evolution) -
+  Digital logic design tool and simulator
+- ![New](images/new.svg) [OpenPnP](https://github.com/openpnp/openpnp) - SMT
+  Pick and Place Hardware and Software
+- ![New](images/new.svg)
+  [TrainControl](https://github.com/bob123456678/TrainControl) - control Marklin
+  / Trix / DCC digital model train layout
+- [Makelangelo Software](https://github.com/MarginallyClever/Makelangelo-software) -
+  for plotters, especially the wall-hanging polargraph
+- [GUIslice Builder](https://github.com/ImpulseAdventure/GUIslice-Builder) - GUI
+  builder for [GUIslice](https://github.com/ImpulseAdventure/GUIslice), a
+  lightweight GUI framework for embedded displays
+- [ThunderFocus](https://github.com/marcocipriani01/ThunderFocus) -
+  Arduino-based telescope focuser
+- [RemoteLight](https://github.com/Drumber/RemoteLight) - multifunctional LED
+  control software
+
+### Media
+
+- ![Hot](images/hot.svg) [jAlbum](https://jalbum.net/) (**commercial**) -
+  creates photo album websites
+- [MediathekView](https://mediathekview.de/) - search in media libraries of
+  various German broadcasters
+- ![New](images/new.svg) [Pixelitor](https://github.com/lbalazscs/Pixelitor) -
+  image editor
+- [Cinecred](https://loadingbyte.com/cinecred/) - create beautiful film credit
+  sequences
+- [tinyMediaManager](https://www.tinymediamanager.org/) (**commercial**) - a
+  media management tool
+- [Weasis](https://nroduit.github.io/) - medical DICOM viewer used in healthcare
+  by hospitals, health networks, etc
+- [Shutter Encoder](https://www.shutterencoder.com/)
+  ([source code](https://github.com/paulpacifico/shutter-encoder)) -
+  professional video converter and compression tool
+- [Sound Analysis](https://github.com/tomasz-herman/SoundAnalysis) - analyze
+  sound files in time or frequency domain
+- [Novel-Grabber](https://github.com/Flameish/Novel-Grabber) - download novels
+  from any webnovel and lightnovel site
+- [lectureStudio](https://www.lecturestudio.org/) - digitize your lectures with
+  ease
+- ![New](images/new.svg) [Nortantis](https://jandjheydorn.com/nortantis) -
+  fantasy map generator and editor
+
+### Modelling / Planning
+
+- ![New](images/new.svg) [OpenRocket](https://github.com/openrocket/openrocket) -
+  model-rocketry aerodynamics and trajectory simulation software
+- ![New](images/new.svg)
+  [Warteschlangensimulator](https://github.com/A-Herzog/Warteschlangensimulator) -
+  discrete-event stochastic simulator
+- ![New](images/new.svg) [Gephi](https://github.com/gephi/gephi) - the Open
+  Graph Viz Platform
+- [Astah](https://astah.net/) (**commercial**) - create UML, ER Diagram,
+  Flowchart, Data Flow Diagram, Requirement Diagram, SysML diagrams and more
+- [IGMAS+](https://www.gfz-potsdam.de/igmas) - Interactive Gravity and Magnetic
+  Application System
+- ![New](images/new.svg) [StarPlan](https://www.progotec.de/) (**commercial**) -
+  die Stundenplan Software für Bildungseinrichtungen
+- ![New](images/new.svg) [SSPlot](https://github.com/babaissarkar/ssplot) -
+  plotting utility for plotting CSV data
+
+### Documents
+
+- [Big Faceless (BFO) PDF Viewer](https://bfo.com/) (**commercial**) - Swing PDF
+  Viewer
+- [PDF Studio](https://www.qoppa.com/pdfstudio/) (**commercial**) - create,
+  review and edit PDF documents
+- [XMLmind XML Editor](https://www.xmlmind.com/xmleditor/) (**commercial**)
+
+### Geo
+
 - ![Hot](images/hot.svg) [JOSM](https://josm.openstreetmap.de/) - an extensible
   editor for [OpenStreetMap](https://www.openstreetmap.org/) (requires FlatLaf
   JOSM plugin)
-- ![Hot](images/hot.svg) [jAlbum](https://jalbum.net/) 21 (**commercial**) -
-  creates photo album websites
-- [PDF Studio](https://www.qoppa.com/pdfstudio/) 2021 (**commercial**) - create,
-  review and edit PDF documents
-- [XMLmind XML Editor](https://www.xmlmind.com/xmleditor/) 9.3 (**commercial**)
-- [Total Validator](https://www.totalvalidator.com/) 15 (**commercial**) -
-  checks your website
-- [j-lawyer](https://github.com/jlawyerorg/j-lawyer-org) - Kanzleisoftware
-- [MegaMek](https://github.com/MegaMek/megamek),
-  [MegaMekLab](https://github.com/MegaMek/megameklab) and
-  [MekHQ](https://github.com/MegaMek/mekhq) v0.47.5+ - a sci-fi tabletop
-  BattleTech simulator suite handling battles, unit building, and campaigns
-- [GUIslice Builder](https://github.com/ImpulseAdventure/GUIslice-Builder)
-  0.13.b024 - GUI builder for
-  [GUIslice](https://github.com/ImpulseAdventure/GUIslice), a lightweight GUI
-  framework for embedded displays
-- [Rest Suite](https://github.com/supanadit/restsuite) - Rest API testing
-- [ControllerBuddy](https://github.com/bwRavencl/ControllerBuddy) - advanced
-  gamepad mapping software
-- [SpringRemote](https://github.com/HaleyWang/SpringRemote) - remote Linux SSH
-  connections manager
-- [jEnTunnel](https://github.com/ggrandes/jentunnel) - manage SSH Tunnels made
-  easy
+- [Mapton](https://mapton.org/)
+  ([source code](https://github.com/trixon/mapton)) - some kind of map
+  application (based on NetBeans platform)
+- [MeteoInfo](https://github.com/meteoinfo/MeteoInfo) - GIS and scientific
+  computation environment for meteorological community
+
+### Business / Legal
+
+- ![New](images/new.svg) ![Sponsor](images/sponsor.svg)
+  [Lisheane ERP](https://www.lisheane.ch/) (**commercial**) - backoffice
+  applikation
+- ![Sponsor](images/sponsor.svg)
+  [j-lawyer](https://github.com/jlawyerorg/j-lawyer-org) - Kanzleisoftware
+- ![Sponsor](images/sponsor.svg) [Jeyla Studio](https://www.jeylastudio.com/) -
+  Salon Software
+- [Fanurio](https://www.fanuriotimetracking.com/) (**commercial**) - time
+  tracking and billing for freelancers and teams
+- [Jes](https://www.jes-eur.de) - Die Java-EÜR
 - [mendelson AS2](https://sourceforge.net/projects/mec-as2/),
   [AS4](https://sourceforge.net/projects/mendelson-as4/) and
   [OFTP2](https://sourceforge.net/projects/mendelson-oftp2/) (open-source) and
   [mendelson AS2](https://mendelson-e-c.com/as2/),
   [AS4](https://mendelson-e-c.com/as4/) and
   [OFTP2](https://mendelson-e-c.com/oftp2) (**commercial**)
-- [IGMAS+](https://www.gfz-potsdam.de/igmas) - Interactive Gravity and Magnetic
-  Application System
-- [MeteoInfo](https://github.com/meteoinfo/MeteoInfo) 2.2 - GIS and scientific
-  computation environment for meteorological community
-- [lsfusion platform](https://github.com/lsfusion/platform) 4 - information
-  systems development platform
-- [JPass](https://github.com/gaborbata/jpass) - password manager with strong
-  encryption
-- [Jes - Die Java-EÜR](https://www.jes-eur.de)
-- [Mapton](https://mapton.org/) 2.0
-  ([source code](https://github.com/trixon/mapton)) - some kind of map
-  application (based on NetBeans platform)
-- [Pseudo Assembler IDE](https://github.com/tomasz-herman/PseudoAssemblerIDE) -
-  IDE for Pseudo-Assembler
-- [Linotte](https://github.com/cpc6128/LangageLinotte) 3.1 - French programming
-  language created to learn programming
-- [MEKA](https://github.com/Waikato/meka) 1.9.3 - multi-label classifiers and
-  evaluation procedures using the Weka machine learning framework
-- [Shutter Encoder](https://www.shutterencoder.com/) 14.2
-  ([source code](https://github.com/paulpacifico/shutter-encoder)) -
-  professional video converter and compression tool (screenshots show **old**
-  look)
-- [Sound Analysis](https://github.com/tomasz-herman/SoundAnalysis) - analyze
-  sound files in time or frequency domain
-- [RemoteLight](https://github.com/Drumber/RemoteLight) - multifunctional LED
-  control software
-- [ThunderFocus](https://github.com/marcocipriani01/ThunderFocus) -
-  Arduino-based telescope focuser
-- [Novel-Grabber](https://github.com/Flameish/Novel-Grabber) - download novels
-  from any webnovel and lightnovel site
-- [lectureStudio](https://www.lecturestudio.org/) 4.3.1060 - digitize your
-  lectures with ease
+
+### Messaging
+
+- [Spark](https://github.com/igniterealtime/Spark) - cross-platform IM client
+  optimized for businesses and organizations
+- [Chatty](https://github.com/chatty/chatty) - Twitch Chat Client
+
+### Gaming
+
+- ![Sponsor](images/sponsor.svg) [BGBlitz](https://www.bgblitz.com/)
+  (**commercial**) - professional Backgammon
+- ![New](images/new.svg) [josé](https://peteschaefer.github.io/jose/) - a
+  graphical chess tool
+- ![New](images/new.svg) [MCreator](https://github.com/MCreator/MCreator) - make
+  Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons, and data packs
+- [MapTool](https://github.com/RPTools/maptool) - virtual Tabletop for playing
+  role-playing games
+- [MegaMek](https://github.com/MegaMek/megamek),
+  [MegaMekLab](https://github.com/MegaMek/megameklab) and
+  [MekHQ](https://github.com/MegaMek/mekhq) - a sci-fi tabletop BattleTech
+  simulator suite handling battles, unit building, and campaigns
+- [ControllerBuddy](https://github.com/bwRavencl/ControllerBuddy) - advanced
+  gamepad mapping software
+
+### Utilities
+
+- [MooInfo](https://github.com/rememberber/MooInfo) - visual implementation of
+  OSHI, to view information about the system and hardware
+- [Linux Task Manager (LTM)](https://github.com/ajee10x/LTM-LinuxTaskManager) -
+  GUI for monitoring and managing various aspects of a Linux system
+- [Rest Suite](https://github.com/supanadit/restsuite) - Rest API testing
+- [SpringRemote](https://github.com/HaleyWang/SpringRemote) - remote Linux SSH
+  connections manager
+- [jEnTunnel](https://github.com/ggrandes/jentunnel) - manage SSH Tunnels made
+  easy
 - [Android Tool](https://github.com/fast-geek/Android-Tool) - makes popular adb
   and fastboot commands easier to use
-- and more...
+- ![New](images/new.svg) [Termora](https://github.com/TermoraDev/termora) -
+  Terminal emulator and SSH client
+
+### Miscellaneous
+
+- [MEKA](https://github.com/Waikato/meka) - multi-label classifiers and
+  evaluation procedures using the Weka machine learning framework

build.gradle.kts

@@ -14,22 +14,30 @@
  * limitations under the License.
  */
 
-val releaseVersion = "3.1.1"
-val developmentVersion = "3.2-SNAPSHOT"
+import io.github.gradlenexus.publishplugin.CloseNexusStagingRepository
+import net.ltgt.gradle.errorprone.errorprone
+import org.gradle.kotlin.dsl.withType
 
-version = if( rootProject.hasProperty( "release" ) ) releaseVersion else developmentVersion
 
-allprojects {
+// initialize version
+group = "com.formdev"
+version = property( if( hasProperty( "release" ) ) "flatlaf.releaseVersion" else "flatlaf.developmentVersion" ) as String
+
+// for PR snapshots change version to 'PR-<pr_number>-SNAPSHOT'
+val pullRequestNumber = findProperty( "github.event.pull_request.number" )
+if( pullRequestNumber != null )
+	version = "PR-${pullRequestNumber}-SNAPSHOT"
+
+// apply version to all subprojects
+subprojects {
 	version = rootProject.version
-
-	repositories {
-		mavenCentral()
-	}
 }
 
-// check required Java version
-if( JavaVersion.current() < JavaVersion.VERSION_1_8 )
-	throw RuntimeException( "Java 8 or later required (running ${System.getProperty( "java.version" )})" )
+
+// initialize toolchain version (default is Java 8)
+val toolchainJavaVersion: String by extra {
+	System.getProperty( "toolchain", "8" )
+}
 
 // log version, Gradle and Java versions
 println()
@@ -37,13 +45,20 @@ println( "----------------------------------------------------------------------
 println( "FlatLaf Version: ${version}" )
 println( "Gradle ${gradle.gradleVersion} at ${gradle.gradleHomeDir}" )
 println( "Java ${System.getProperty( "java.version" )}" )
-val toolchainJavaVersion = System.getProperty( "toolchain" )
-if( !toolchainJavaVersion.isNullOrEmpty() )
-	println( "Java toolchain ${toolchainJavaVersion}" )
+println( "Java toolchain ${toolchainJavaVersion}" )
 println()
 
 
+plugins {
+	alias( libs.plugins.gradle.nexus.publish.plugin )
+	alias( libs.plugins.errorprone ) apply false
+}
+
 allprojects {
+	repositories {
+		mavenCentral()
+	}
+
 	tasks {
 		withType<JavaCompile>().configureEach {
 			sourceCompatibility = "1.8"
@@ -67,6 +82,10 @@ allprojects {
 			}
 		}
 
+		withType<AbstractArchiveTask>().configureEach {
+			isPreserveFileTimestamps = true
+		}
+
 		withType<Javadoc>().configureEach {
 			options {
 				this as StandardJavadocDocletOptions
@@ -79,6 +98,101 @@ allprojects {
 				links( "https://docs.oracle.com/en/java/javase/11/docs/api/" )
 			}
 			isFailOnError = false
+
+			// use Java 25 to generate javadoc
+			val javaToolchains = (project as ExtensionAware).extensions.getByName("javaToolchains") as JavaToolchainService
+			javadocTool.set( javaToolchains.javadocToolFor {
+				languageVersion.set( JavaLanguageVersion.of( 25 ) )
+			} )
+		}
+
+		// mark some publishing related tasks as not compatible with configuration cache
+		withType<Sign>().configureEach {
+			notCompatibleWithConfigurationCache( "not compatible" )
+		}
+		withType<PublishToMavenRepository>().configureEach {
+			notCompatibleWithConfigurationCache( "not compatible" )
+		}
+		withType<CloseNexusStagingRepository>().configureEach {
+			notCompatibleWithConfigurationCache( "not compatible" )
+		}
+	}
+
+
+	//---- Error Prone ----
+
+	tasks.register( "errorprone" ) {
+		group = "verification"
+		tasks.withType<JavaCompile>().forEach {
+			dependsOn( it )
+		}
+	}
+
+	val useErrorProne = gradle.startParameter.taskNames.contains( "errorprone" )
+	if( useErrorProne ) {
+		plugins.withType<JavaPlugin> {
+			apply( plugin = libs.plugins.errorprone.get().pluginId )
+
+			dependencies {
+				"errorprone"( libs.errorprone )
+			}
+
+			tasks.withType<JavaCompile>().configureEach {
+				options.compilerArgs.add( "-Werror" )
+				options.errorprone {
+					disable(
+						"ReferenceEquality",	// reports usage of '==' for objects
+						"StringSplitter",		// reports String.split()
+						"JavaTimeDefaultTimeZone",	// reports Year.now()
+						"MissingSummary",		// reports `/** @since 2 */`
+						"InvalidBlockTag",		// reports @uiDefault in javadoc
+						"AlreadyChecked",		// reports false positives
+						"InlineMeSuggester",	// suggests using Error Prone annotations for deprecated methods
+						"TypeParameterUnusedInFormals",
+						"UnsynchronizedOverridesSynchronized",
+						"NonApiType",			// reports ArrayList/HashSet in parameter or return type
+					)
+					when( project.name ) {
+						"flatlaf-intellij-themes" -> disable(
+							"MutablePublicArray",	// reports FlatAllIJThemes.INFOS
+						)
+						"flatlaf-theme-editor" -> disable(
+							"CatchAndPrintStackTrace",
+						)
+						"flatlaf-testing" -> disable(
+							"CatchAndPrintStackTrace",
+							"JdkObsolete",			// reports Hashtable used for JSlider.setLabelTable()
+							"JavaUtilDate",			// reports usage of class Date
+						)
+					}
+				}
+
+				// Error Prone requires at lease Java 11
+				val java = (project as ExtensionAware).extensions.getByName("java") as JavaPluginExtension
+				val javaToolchains = (project as ExtensionAware).extensions.getByName("javaToolchains") as JavaToolchainService
+				if( java.toolchain.languageVersion.get().asInt() < 11 ) {
+					javaCompiler.set( javaToolchains.compilerFor {
+						languageVersion.set( JavaLanguageVersion.of( 11 ) )
+					} )
+				}
+			}
+		}
+	}
+}
+
+nexusPublishing {
+	repositories {
+		sonatype {
+			// see https://central.sonatype.org/publish/publish-portal-ossrh-staging-api/
+			nexusUrl = uri( "https://ossrh-staging-api.central.sonatype.com/service/local/" )
+			snapshotRepositoryUrl = uri( "https://central.sonatype.com/repository/maven-snapshots/" )
+
+			// get from gradle.properties
+			val sonatypeUsername: String? by project
+			val sonatypePassword: String? by project
+
+			username = System.getenv( "SONATYPE_USERNAME" ) ?: sonatypeUsername
+			password = System.getenv( "SONATYPE_PASSWORD" ) ?: sonatypePassword
 		}
 	}
 }

buildSrc/src/main/java/ReorderJarEntries.java

@@ -45,7 +45,7 @@ public class ReorderJarEntries
 			// 1st pass: copy .properties files
 			copyFiles( zipOutStream, jarFile, name -> name.endsWith( ".properties" ) );
 
-			// 2st pass: copy other files
+			// 2nd pass: copy other files
 			copyFiles( zipOutStream, jarFile, name -> !name.endsWith( ".properties" ) );
 		}
 

buildSrc/src/main/kotlin/flatlaf-cpp-library.gradle.kts

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+import org.gradle.kotlin.dsl.support.serviceOf
+
 plugins {
 	`cpp-library`
 }
@@ -27,7 +29,7 @@ library {
 		}
 		with( linkTask.get() ) {
 			if( name.contains( "Release" ) )
-				debuggable.set( false )
+				debuggable = false
 		}
 	}
 }
@@ -37,9 +39,14 @@ tasks {
 		doFirst {
 			println( "Used Tool Chain:" )
 			println( "  - ${toolChain.get()}" )
-			println( "Available Tool Chains:" )
-			toolChains.forEach {
-				println( "  - $it" )
+		}
+
+		if( !project.gradle.serviceOf<BuildFeatures>().configurationCache.active.get() ) {
+			doFirst {
+				println( "Available Tool Chains:" )
+				toolChains.forEach {
+					println( "  - $it" )
+				}
 			}
 		}
 	}

buildSrc/src/main/kotlin/flatlaf-java9.gradle.kts

@@ -18,7 +18,14 @@ plugins {
 	java
 }
 
-if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
+// for Eclipse IDE project import, exclude if:
+// - plugin "eclipse" is applied; e.g. if running in Eclipse IDE with buildship plugin
+// - no taskNames specified at command line; e.g. if buildship synchronizes projects
+val exclude =
+	rootProject.plugins.hasPlugin( "eclipse" ) &&
+	gradle.startParameter.taskNames.isEmpty()
+
+if( !exclude ) {
 	sourceSets {
 		create( "java9" ) {
 			java {
@@ -35,6 +42,13 @@ if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
 		named<JavaCompile>( "compileJava9Java" ) {
 			sourceCompatibility = "9"
 			targetCompatibility = "9"
+
+			// if global toolchain is Java 8, then use Java 11 to build
+			if( java.toolchain.languageVersion.get().asInt() < 9 ) {
+				javaCompiler.set( javaToolchains.compilerFor {
+					languageVersion.set( JavaLanguageVersion.of( 11 ) )
+				} )
+			}
 		}
 
 		jar {

buildSrc/src/main/kotlin/flatlaf-jni-headers.gradle.kts

@@ -26,7 +26,7 @@ tasks {
 		// depend on :flatlaf-core:compileJava because it generates the JNI headers
 		dependsOn( ":flatlaf-core:compileJava" )
 
-		from( project( ":flatlaf-core" ).buildDir.resolve( "generated/jni-headers" ) )
+		from( project( ":flatlaf-core" ).layout.buildDirectory.dir( "generated/jni-headers" ) )
 		into( "src/main/headers" )
 		include( extension.headers )
 		filter<org.apache.tools.ant.filters.FixCrLfFilter>(

buildSrc/src/main/kotlin/flatlaf-module-info.gradle.kts

@@ -29,7 +29,14 @@ plugins {
 	java
 }
 
-if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
+// for Eclipse IDE project import, exclude if:
+// - plugin "eclipse" is applied; e.g. if running in Eclipse IDE with buildship plugin
+// - no taskNames specified at command line; e.g. if buildship synchronizes projects
+val exclude =
+	rootProject.plugins.hasPlugin( "eclipse" ) &&
+	gradle.startParameter.taskNames.isEmpty()
+
+if( !exclude ) {
 	sourceSets {
 		create( "module-info" ) {
 			java {
@@ -38,10 +45,11 @@ if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
 				setSrcDirs( listOf( "src/main/module-info", "src/main/java", "src/main/java9" ) )
 
 				// exclude Java 8 source file if an equally named Java 9+ source file exists
+				val projectDir = projectDir // necessary for configuration cache
 				exclude {
 					if( it.isDirectory )
 						return@exclude false
-					val java9file = file( "${projectDir}/src/main/java9/${it.path}" )
+					val java9file = File( "${projectDir}/src/main/java9/${it.path}" )
 					java9file.exists() && java9file != it.file
 				}
 			}
@@ -58,6 +66,13 @@ if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
 			options.compilerArgs.add( "--module-path" )
 			options.compilerArgs.add( configurations.runtimeClasspath.get().asPath
 				+ File.pathSeparator + configurations.compileClasspath.get().asPath )
+
+			// if global toolchain is Java 8, then use Java 11 to build
+			if( java.toolchain.languageVersion.get().asInt() < 9 ) {
+				javaCompiler.set( javaToolchains.compilerFor {
+					languageVersion.set( JavaLanguageVersion.of( 11 ) )
+				} )
+			}
 		}
 
 		jar {

buildSrc/src/main/kotlin/flatlaf-publish.gradle.kts

@@ -15,7 +15,7 @@
  */
 
 
-open class NativeArtifact( val fileName: String, val classifier: String, val type: String ) {}
+open class NativeArtifact( val fileName: String, val classifier: String, val extension: String ) {}
 
 open class PublishExtension {
 	var artifactId: String? = null
@@ -44,66 +44,47 @@ publishing {
 
 			pom {
 				afterEvaluate {
-					this@pom.name.set( extension.name )
-					this@pom.description.set( extension.description )
+					this@pom.name = extension.name
+					this@pom.description = extension.description
 				}
-				url.set( "https://github.com/JFormDesigner/FlatLaf" )
+				url = "https://github.com/JFormDesigner/FlatLaf"
 
 				licenses {
 					license {
-						name.set( "The Apache License, Version 2.0" )
-						url.set( "https://www.apache.org/licenses/LICENSE-2.0.txt" )
+						name = "The Apache License, Version 2.0"
+						url = "https://www.apache.org/licenses/LICENSE-2.0.txt"
 					}
 				}
 
 				developers {
 					developer {
-						name.set( "Karl Tauber" )
-						organization.set( "FormDev Software GmbH" )
-						organizationUrl.set( "https://www.formdev.com/" )
+						name = "Karl Tauber"
+						organization = "FormDev Software GmbH"
+						organizationUrl = "https://www.formdev.com/"
 					}
 				}
 
 				scm {
-					connection.set( "scm:git:git://github.com/JFormDesigner/FlatLaf.git" )
-					url.set( "https://github.com/JFormDesigner/FlatLaf" )
+					connection = "scm:git:git://github.com/JFormDesigner/FlatLaf.git"
+					url = "https://github.com/JFormDesigner/FlatLaf"
 				}
 
 				issueManagement {
-					system.set( "GitHub" )
-					url.set( "https://github.com/JFormDesigner/FlatLaf/issues" )
+					system = "GitHub"
+					url = "https://github.com/JFormDesigner/FlatLaf/issues"
 				}
 			}
 
 			afterEvaluate {
 				extension.nativeArtifacts?.forEach {
-					artifact( artifacts.add( "archives", file( it.fileName ) ) {
+					artifact( file( it.fileName ) ) {
 						classifier = it.classifier
-						type = it.type
-					} )
+						extension = it.extension
+					}
 				}
 			}
 		}
 	}
-
-	repositories {
-		maven {
-			name = "OSSRH"
-
-			val releasesRepoUrl = "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
-			val snapshotsRepoUrl = "https://oss.sonatype.org/content/repositories/snapshots/"
-			url = uri( if( rootProject.hasProperty( "release" ) ) releasesRepoUrl else snapshotsRepoUrl )
-
-			credentials {
-				// get from gradle.properties
-				val ossrhUsername: String? by project
-				val ossrhPassword: String? by project
-
-				username = System.getenv( "OSSRH_USERNAME" ) ?: ossrhUsername
-				password = System.getenv( "OSSRH_PASSWORD" ) ?: ossrhPassword
-			}
-		}
-	}
 }
 
 signing {
@@ -122,3 +103,23 @@ signing {
 tasks.withType<Sign>().configureEach {
 	onlyIf { rootProject.hasProperty( "release" ) }
 }
+
+tasks {
+	// check whether parallel build is enabled
+	withType<AbstractPublishToMaven>().configureEach {
+		doFirst {
+			if( System.getProperty( "org.gradle.parallel" ) == "true" )
+				throw RuntimeException( "Publishing does not work correctly with enabled parallel build. Disable parallel build with VM option '-Dorg.gradle.parallel=false'." )
+		}
+	}
+
+	register( "publishToSonatypeAndCloseStagingRepo" ) {
+		group = "publishing"
+		description = "Publish to Sonatype Maven Central and close staging repository"
+
+		dependsOn(
+			"publishToSonatype",
+			":closeSonatypeStagingRepository"
+		)
+	}
+}

buildSrc/src/main/kotlin/flatlaf-toolchain.gradle.kts

@@ -18,9 +18,8 @@ plugins {
 	java
 }
 
-val toolchainJavaVersion = System.getProperty( "toolchain" )
-if( !toolchainJavaVersion.isNullOrEmpty() ) {
-	java.toolchain {
-		languageVersion.set( JavaLanguageVersion.of( toolchainJavaVersion ) )
-	}
+val toolchainJavaVersion: String by rootProject.extra
+
+java.toolchain {
+	languageVersion = JavaLanguageVersion.of( toolchainJavaVersion )
 }

flatlaf-core/.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=ISO-8859-1

flatlaf-core/.settings/org.eclipse.jdt.core.prefs

@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false

flatlaf-core/build.gradle.kts

@@ -27,12 +27,11 @@ plugins {
 val sigtest = configurations.create( "sigtest" )
 
 dependencies {
-	testImplementation( "org.junit.jupiter:junit-jupiter-api:5.7.2" )
-	testImplementation( "org.junit.jupiter:junit-jupiter-params" )
-	testRuntimeOnly( "org.junit.jupiter:junit-jupiter-engine" )
+	testImplementation( libs.junit )
+	testRuntimeOnly( libs.junit.launcher )
 
 	// https://github.com/jtulach/netbeans-apitest
-	sigtest( "org.netbeans.tools:sigtest-maven-plugin:1.7" )
+	sigtest( libs.sigtest )
 }
 
 java {
@@ -43,11 +42,11 @@ java {
 tasks {
 	compileJava {
 		// generate JNI headers
-		options.headerOutputDirectory.set( buildDir.resolve( "generated/jni-headers" ) )
+		options.headerOutputDirectory = layout.buildDirectory.dir( "generated/jni-headers" )
 	}
 
 	jar {
-		archiveBaseName.set( "flatlaf" )
+		archiveBaseName = "flatlaf"
 
 		doLast {
 			ReorderJarEntries.reorderJarEntries( outputs.files.singleFile );
@@ -55,11 +54,32 @@ tasks {
 	}
 
 	named<Jar>( "sourcesJar" ) {
-		archiveBaseName.set( "flatlaf" )
+		archiveBaseName = "flatlaf"
 	}
 
 	named<Jar>( "javadocJar" ) {
-		archiveBaseName.set( "flatlaf" )
+		archiveBaseName = "flatlaf"
+	}
+
+	register<Zip>( "jarNoNatives" ) {
+		group = "build"
+		dependsOn( "jar" )
+
+		archiveBaseName = "flatlaf"
+		archiveClassifier = "no-natives"
+		archiveExtension = "jar"
+		destinationDirectory = layout.buildDirectory.dir( "libs" )
+
+		from( zipTree( jar.get().archiveFile.get().asFile ) )
+		exclude( "com/formdev/flatlaf/natives/**" )
+	}
+
+	withType<AbstractPublishToMaven>().configureEach {
+		dependsOn( "jarNoNatives" )
+	}
+
+	withType<Sign>().configureEach {
+		dependsOn( "jarNoNatives" )
 	}
 
 	check {
@@ -70,7 +90,7 @@ tasks {
 		useJUnitPlatform()
 		testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
 
-		if( JavaVersion.current() >= JavaVersion.VERSION_1_9 )
+		if( java.toolchain.languageVersion.get().asInt() >= 9 )
 			jvmArgs( listOf( "--add-opens", "java.desktop/javax.swing.plaf.basic=ALL-UNNAMED" ) )
 	}
 
@@ -78,21 +98,31 @@ tasks {
 		group = "verification"
 		dependsOn( "jar" )
 
+		// necessary for configuration cache
+		val classpath = sigtest.asPath
+		val signatureFile = "${project.name}-sigtest.txt"
+		val jarPath = jar.get().outputs.files.asPath
+		val version = version
+
 		doLast {
 			ant.withGroovyBuilder {
 				"taskdef"(
 					"name" to "sigtest",
 					"classname" to "org.netbeans.apitest.Sigtest",
-					"classpath" to sigtest.asPath )
+					"classpath" to classpath )
 
 				"sigtest"(
 					"action" to "generate",
-					"fileName" to "${project.name}-sigtest.txt",
-					"classpath" to jar.get().outputs.files.asPath,
+					"fileName" to signatureFile,
+					"classpath" to jarPath,
 					"packages" to "com.formdev.flatlaf,com.formdev.flatlaf.themes,com.formdev.flatlaf.util",
 					"version" to version,
 					"release" to "1.8", // Java version
 					"failonerror" to "true" )
+
+				"fixcrlf"(
+					"file" to signatureFile,
+					"eol" to "lf" )
 			}
 		}
 	}
@@ -101,17 +131,23 @@ tasks {
 		group = "verification"
 		dependsOn( "jar" )
 
+		// necessary for configuration cache
+		val classpath = sigtest.asPath
+		val signatureFile = "${project.name}-sigtest.txt"
+		val jarPath = jar.get().outputs.files.asPath
+		val version = version
+
 		doLast {
 			ant.withGroovyBuilder {
 				"taskdef"(
 					"name" to "sigtest",
 					"classname" to "org.netbeans.apitest.Sigtest",
-					"classpath" to sigtest.asPath )
+					"classpath" to classpath )
 
 				"sigtest"(
 					"action" to "check",
-					"fileName" to "${project.name}-sigtest.txt",
-					"classpath" to jar.get().outputs.files.asPath,
+					"fileName" to signatureFile,
+					"classpath" to jarPath,
 					"packages" to "com.formdev.flatlaf,com.formdev.flatlaf.util",
 					"version" to version,
 					"release" to "1.8", // Java version
@@ -128,8 +164,14 @@ flatlafPublish {
 
 	val natives = "src/main/resources/com/formdev/flatlaf/natives"
 	nativeArtifacts = listOf(
-		NativeArtifact( "${natives}/flatlaf-windows-x86.dll",    "windows-x86",    "dll" ),
-		NativeArtifact( "${natives}/flatlaf-windows-x86_64.dll", "windows-x86_64", "dll" ),
-		NativeArtifact( "${natives}/libflatlaf-linux-x86_64.so", "linux-x86_64",   "so" ),
+		NativeArtifact( tasks.getByName( "jarNoNatives" ).outputs.files.asPath, "no-natives", "jar" ),
+
+		NativeArtifact( "${natives}/flatlaf-windows-x86.dll",       "windows-x86",    "dll" ),
+		NativeArtifact( "${natives}/flatlaf-windows-x86_64.dll",    "windows-x86_64", "dll" ),
+		NativeArtifact( "${natives}/flatlaf-windows-arm64.dll",     "windows-arm64",  "dll" ),
+		NativeArtifact( "${natives}/libflatlaf-macos-arm64.dylib",  "macos-arm64",    "dylib" ),
+		NativeArtifact( "${natives}/libflatlaf-macos-x86_64.dylib", "macos-x86_64",   "dylib" ),
+		NativeArtifact( "${natives}/libflatlaf-linux-x86_64.so",    "linux-x86_64",   "so" ),
+		NativeArtifact( "${natives}/libflatlaf-linux-arm64.so",     "linux-arm64",    "so" ),
 	)
 }

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 3.1
+#Version 3.6.2
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -12,17 +12,25 @@ fld public final static java.lang.String BUTTON_TYPE_TOOLBAR_BUTTON = "toolBarBu
 fld public final static java.lang.String COMPONENT_FOCUS_OWNER = "JComponent.focusOwner"
 fld public final static java.lang.String COMPONENT_ROUND_RECT = "JComponent.roundRect"
 fld public final static java.lang.String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption"
+fld public final static java.lang.String FULL_WINDOW_CONTENT = "FlatLaf.fullWindowContent"
+fld public final static java.lang.String FULL_WINDOW_CONTENT_BUTTONS_BOUNDS = "FlatLaf.fullWindowContent.buttonsBounds"
+fld public final static java.lang.String FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER = "FlatLaf.fullWindowContent.buttonsPlaceholder"
 fld public final static java.lang.String GLASS_PANE_FULL_HEIGHT = "JRootPane.glassPaneFullHeight"
+fld public final static java.lang.String MACOS_WINDOW_BUTTONS_SPACING = "FlatLaf.macOS.windowButtonsSpacing"
+fld public final static java.lang.String MACOS_WINDOW_BUTTONS_SPACING_LARGE = "large"
+fld public final static java.lang.String MACOS_WINDOW_BUTTONS_SPACING_MEDIUM = "medium"
 fld public final static java.lang.String MENU_BAR_EMBEDDED = "JRootPane.menuBarEmbedded"
 fld public final static java.lang.String MINIMUM_HEIGHT = "JComponent.minimumHeight"
 fld public final static java.lang.String MINIMUM_WIDTH = "JComponent.minimumWidth"
 fld public final static java.lang.String OUTLINE = "JComponent.outline"
 fld public final static java.lang.String OUTLINE_ERROR = "error"
+fld public final static java.lang.String OUTLINE_SUCCESS = "success"
 fld public final static java.lang.String OUTLINE_WARNING = "warning"
 fld public final static java.lang.String PLACEHOLDER_TEXT = "JTextField.placeholderText"
 fld public final static java.lang.String POPUP_BORDER_CORNER_RADIUS = "Popup.borderCornerRadius"
 fld public final static java.lang.String POPUP_DROP_SHADOW_PAINTED = "Popup.dropShadowPainted"
 fld public final static java.lang.String POPUP_FORCE_HEAVY_WEIGHT = "Popup.forceHeavyWeight"
+fld public final static java.lang.String POPUP_ROUNDED_BORDER_WIDTH = "Popup.roundedBorderWidth"
 fld public final static java.lang.String PROGRESS_BAR_LARGE_HEIGHT = "JProgressBar.largeHeight"
 fld public final static java.lang.String PROGRESS_BAR_SQUARE = "JProgressBar.square"
 fld public final static java.lang.String SCROLL_BAR_SHOW_BUTTONS = "JScrollBar.showButtons"
@@ -33,6 +41,7 @@ fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY = "JTextFiel
 fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY_ALWAYS = "always"
 fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY_NEVER = "never"
 fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY_ONCE = "once"
+fld public final static java.lang.String SELECT_ALL_ON_MOUSE_CLICK = "JTextField.selectAllOnMouseClick"
 fld public final static java.lang.String SPLIT_PANE_EXPANDABLE_SIDE = "JSplitPane.expandableSide"
 fld public final static java.lang.String SPLIT_PANE_EXPANDABLE_SIDE_LEFT = "left"
 fld public final static java.lang.String SPLIT_PANE_EXPANDABLE_SIDE_RIGHT = "right"
@@ -67,6 +76,11 @@ fld public final static java.lang.String TABBED_PANE_TAB_CLOSE_TOOLTIPTEXT = "JT
 fld public final static java.lang.String TABBED_PANE_TAB_HEIGHT = "JTabbedPane.tabHeight"
 fld public final static java.lang.String TABBED_PANE_TAB_ICON_PLACEMENT = "JTabbedPane.tabIconPlacement"
 fld public final static java.lang.String TABBED_PANE_TAB_INSETS = "JTabbedPane.tabInsets"
+fld public final static java.lang.String TABBED_PANE_TAB_ROTATION = "JTabbedPane.tabRotation"
+fld public final static java.lang.String TABBED_PANE_TAB_ROTATION_AUTO = "auto"
+fld public final static java.lang.String TABBED_PANE_TAB_ROTATION_LEFT = "left"
+fld public final static java.lang.String TABBED_PANE_TAB_ROTATION_NONE = "none"
+fld public final static java.lang.String TABBED_PANE_TAB_ROTATION_RIGHT = "right"
 fld public final static java.lang.String TABBED_PANE_TAB_TYPE = "JTabbedPane.tabType"
 fld public final static java.lang.String TABBED_PANE_TAB_TYPE_CARD = "card"
 fld public final static java.lang.String TABBED_PANE_TAB_TYPE_UNDERLINED = "underlined"
@@ -88,14 +102,18 @@ fld public final static java.lang.String TEXT_FIELD_TRAILING_COMPONENT = "JTextF
 fld public final static java.lang.String TEXT_FIELD_TRAILING_ICON = "JTextField.trailingIcon"
 fld public final static java.lang.String TITLE_BAR_BACKGROUND = "JRootPane.titleBarBackground"
 fld public final static java.lang.String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground"
+fld public final static java.lang.String TITLE_BAR_HEIGHT = "JRootPane.titleBarHeight"
 fld public final static java.lang.String TITLE_BAR_SHOW_CLOSE = "JRootPane.titleBarShowClose"
 fld public final static java.lang.String TITLE_BAR_SHOW_ICON = "JRootPane.titleBarShowIcon"
 fld public final static java.lang.String TITLE_BAR_SHOW_ICONIFFY = "JRootPane.titleBarShowIconify"
 fld public final static java.lang.String TITLE_BAR_SHOW_MAXIMIZE = "JRootPane.titleBarShowMaximize"
 fld public final static java.lang.String TITLE_BAR_SHOW_TITLE = "JRootPane.titleBarShowTitle"
 fld public final static java.lang.String TREE_PAINT_SELECTION = "JTree.paintSelection"
+fld public final static java.lang.String TREE_WIDE_CELL_RENDERER = "JTree.wideCellRenderer"
 fld public final static java.lang.String TREE_WIDE_SELECTION = "JTree.wideSelection"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "JRootPane.useWindowDecorations"
+fld public final static java.lang.String WINDOW_STYLE = "Window.style"
+fld public final static java.lang.String WINDOW_STYLE_SMALL = "small"
 meth public static <%0 extends java.lang.Object> {%%0} clientProperty(javax.swing.JComponent,java.lang.String,{%%0},java.lang.Class<{%%0}>)
 meth public static boolean clientPropertyBoolean(javax.swing.JComponent,java.lang.String,boolean)
 meth public static boolean clientPropertyEquals(javax.swing.JComponent,java.lang.String,java.lang.Object)
@@ -205,10 +223,14 @@ meth public static java.lang.String getPreferredFontFamily()
 meth public static java.lang.String getPreferredLightFontFamily()
 meth public static java.lang.String getPreferredMonospacedFontFamily()
 meth public static java.lang.String getPreferredSemiboldFontFamily()
+meth public static java.lang.String getUIKeyLightOrDarkPrefix(boolean)
 meth public static java.util.Map<java.lang.String,java.lang.Class<?>> getStyleableInfos(javax.swing.JComponent)
 meth public static java.util.Map<java.lang.String,java.lang.String> getGlobalExtraDefaults()
+meth public static java.util.Set<java.lang.String> getUIKeyPlatformPrefixes()
+meth public static java.util.Set<java.lang.String> getUIKeySpecialPrefixes()
 meth public static java.util.function.Function<java.lang.String,java.awt.Color> getSystemColorGetter()
 meth public static javax.swing.UIDefaults$ActiveValue createActiveFontValue(float)
+meth public static void disableWindowsD3Donscreen()
 meth public static void hideMnemonics()
 meth public static void initIconColors(javax.swing.UIDefaults,boolean)
 meth public static void installLafInfo(java.lang.String,java.lang.Class<? extends javax.swing.LookAndFeel>)
@@ -239,7 +261,7 @@ meth public void setExtraDefaults(java.util.Map<java.lang.String,java.lang.Strin
 meth public void uninitialize()
 meth public void unregisterUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object>)
 supr javax.swing.plaf.basic.BasicLookAndFeel
-hfds DESKTOPFONTHINTS,aquaLoaded,customDefaultsSources,desktopPropertyListener,desktopPropertyName,desktopPropertyName2,extraDefaults,getUIMethod,getUIMethodInitialized,globalExtraDefaults,mnemonicHandler,oldPopupFactory,postInitialization,preferredFontFamily,preferredLightFontFamily,preferredMonospacedFontFamily,preferredSemiboldFontFamily,subMenuUsabilityHelperInstalled,systemColorGetter,uiDefaultsGetters,updateUIPending
+hfds DESKTOPFONTHINTS,aquaLoaded,customDefaultsSources,desktopPropertyListener,desktopPropertyName,desktopPropertyName2,extraDefaults,globalExtraDefaults,linuxPopupMenuCanceler,mnemonicHandler,oldPopupFactory,postInitialization,preferredFontFamily,preferredLightFontFamily,preferredMonospacedFontFamily,preferredSemiboldFontFamily,subMenuUsabilityHelperInstalled,systemColorGetter,uiDefaultsGetters,uiKeyPlatformPrefixes,uiKeySpecialPrefixes,updateUIPending
 hcls ActiveFont,FlatUIDefaults,ImageIconUIResource
 
 CLSS public abstract interface static com.formdev.flatlaf.FlatLaf$DisabledIconProvider
@@ -275,11 +297,16 @@ CLSS public abstract interface com.formdev.flatlaf.FlatSystemProperties
 fld public final static java.lang.String ANIMATION = "flatlaf.animation"
 fld public final static java.lang.String MENUBAR_EMBEDDED = "flatlaf.menuBarEmbedded"
 fld public final static java.lang.String NATIVE_LIBRARY_PATH = "flatlaf.nativeLibraryPath"
+fld public final static java.lang.String REUSE_VISIBLE_POPUP_WINDOW = "flatlaf.reuseVisiblePopupWindow"
 fld public final static java.lang.String UI_SCALE = "flatlaf.uiScale"
 fld public final static java.lang.String UI_SCALE_ALLOW_SCALE_DOWN = "flatlaf.uiScale.allowScaleDown"
 fld public final static java.lang.String UI_SCALE_ENABLED = "flatlaf.uiScale.enabled"
 fld public final static java.lang.String UPDATE_UI_ON_SYSTEM_FONT_CHANGE = "flatlaf.updateUIOnSystemFontChange"
 fld public final static java.lang.String USE_JETBRAINS_CUSTOM_DECORATIONS = "flatlaf.useJetBrainsCustomDecorations"
+ anno 0 java.lang.Deprecated()
+fld public final static java.lang.String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary"
+fld public final static java.lang.String USE_ROUNDED_POPUP_BORDER = "flatlaf.useRoundedPopupBorder"
+fld public final static java.lang.String USE_SUB_MENU_SAFE_TRIANGLE = "flatlaf.useSubMenuSafeTriangle"
 fld public final static java.lang.String USE_TEXT_Y_CORRECTION = "flatlaf.useTextYCorrection"
 fld public final static java.lang.String USE_UBUNTU_FONT = "flatlaf.useUbuntuFont"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "flatlaf.useWindowDecorations"
@@ -298,7 +325,7 @@ meth public static boolean setup(java.io.InputStream)
 meth public static com.formdev.flatlaf.FlatLaf createLaf(com.formdev.flatlaf.IntelliJTheme)
 meth public static com.formdev.flatlaf.FlatLaf createLaf(java.io.InputStream) throws java.io.IOException
 supr java.lang.Object
-hfds checkboxDuplicateColors,checkboxKeyMapping,colors,icons,isMaterialUILite,namedColors,ui,uiKeyCopying,uiKeyInverseMapping,uiKeyMapping
+hfds checkboxDuplicateColors,checkboxKeyMapping,jsonColors,jsonIcons,jsonUI,namedColors,uiKeyCopying,uiKeyDoNotOverride,uiKeyExcludesContains,uiKeyExcludesStartsWith,uiKeyInverseMapping,uiKeyMapping
 
 CLSS public static com.formdev.flatlaf.IntelliJTheme$ThemeLaf
  outer com.formdev.flatlaf.IntelliJTheme
@@ -393,6 +420,7 @@ innr public static Fade
 innr public static HSLChange
 innr public static HSLIncreaseDecrease
 innr public static Mix
+innr public static Mix2
 meth public !varargs static java.awt.Color applyFunctions(java.awt.Color,com.formdev.flatlaf.util.ColorFunctions$ColorFunction[])
 meth public static float clamp(float)
 meth public static float luma(java.awt.Color)
@@ -454,6 +482,16 @@ meth public java.lang.String toString()
 meth public void apply(float[])
 supr java.lang.Object
 
+CLSS public static com.formdev.flatlaf.util.ColorFunctions$Mix2
+ outer com.formdev.flatlaf.util.ColorFunctions
+cons public init(java.awt.Color,float)
+fld public final float weight
+fld public final java.awt.Color color1
+intf com.formdev.flatlaf.util.ColorFunctions$ColorFunction
+meth public java.lang.String toString()
+meth public void apply(float[])
+supr java.lang.Object
+
 CLSS public com.formdev.flatlaf.util.CubicBezierEasing
 cons public init(float,float,float,float)
 fld public final static com.formdev.flatlaf.util.CubicBezierEasing EASE
@@ -613,16 +651,33 @@ hfds alpha,hsl,rgb
 
 CLSS public com.formdev.flatlaf.util.HiDPIUtils
 cons public init()
+innr public abstract interface static DirtyRegionCallback
 innr public abstract interface static Painter
+innr public static HiDPIRepaintManager
 meth public static float computeTextYCorrection(java.awt.Graphics2D)
 meth public static java.awt.Graphics2D createGraphicsTextYCorrection(java.awt.Graphics2D)
+meth public static void addDirtyRegion(javax.swing.JComponent,int,int,int,int,com.formdev.flatlaf.util.HiDPIUtils$DirtyRegionCallback)
 meth public static void drawStringUnderlineCharAtWithYCorrection(javax.swing.JComponent,java.awt.Graphics2D,java.lang.String,int,int,int)
 meth public static void drawStringWithYCorrection(javax.swing.JComponent,java.awt.Graphics2D,java.lang.String,int,int)
+meth public static void installHiDPIRepaintManager()
 meth public static void paintAtScale1x(java.awt.Graphics2D,int,int,int,int,com.formdev.flatlaf.util.HiDPIUtils$Painter)
 meth public static void paintAtScale1x(java.awt.Graphics2D,javax.swing.JComponent,com.formdev.flatlaf.util.HiDPIUtils$Painter)
+meth public static void repaint(java.awt.Component)
+meth public static void repaint(java.awt.Component,int,int,int,int)
+meth public static void repaint(java.awt.Component,java.awt.Rectangle)
 supr java.lang.Object
 hfds CORRECTION_INTER,CORRECTION_OPEN_SANS,CORRECTION_SEGOE_UI,CORRECTION_TAHOMA,SCALE_FACTORS,useDebugScaleFactor,useTextYCorrection
 
+CLSS public abstract interface static com.formdev.flatlaf.util.HiDPIUtils$DirtyRegionCallback
+ outer com.formdev.flatlaf.util.HiDPIUtils
+meth public abstract void addDirtyRegion(javax.swing.JComponent,int,int,int,int)
+
+CLSS public static com.formdev.flatlaf.util.HiDPIUtils$HiDPIRepaintManager
+ outer com.formdev.flatlaf.util.HiDPIUtils
+cons public init()
+meth public void addDirtyRegion(javax.swing.JComponent,int,int,int,int)
+supr javax.swing.RepaintManager
+
 CLSS public abstract interface static com.formdev.flatlaf.util.HiDPIUtils$Painter
  outer com.formdev.flatlaf.util.HiDPIUtils
 meth public abstract void paint(java.awt.Graphics2D,int,int,int,int,double)
@@ -718,6 +773,7 @@ supr java.lang.Object
 CLSS public com.formdev.flatlaf.util.SystemInfo
 cons public init()
 fld public final static boolean isAARCH64
+fld public final static boolean isGNOME
 fld public final static boolean isJava_11_orLater
 fld public final static boolean isJava_12_orLater
 fld public final static boolean isJava_15_orLater
@@ -734,6 +790,7 @@ fld public final static boolean isMacOS_10_11_ElCapitan_orLater
 fld public final static boolean isMacOS_10_14_Mojave_orLater
 fld public final static boolean isMacOS_10_15_Catalina_orLater
 fld public final static boolean isProjector
+fld public final static boolean isUnknownOS
 fld public final static boolean isWebswing
 fld public final static boolean isWinPE
 fld public final static boolean isWindows
@@ -1121,6 +1178,31 @@ meth public void provideErrorFeedback(java.awt.Component)
 meth public void uninitialize()
 supr java.lang.Object
 
+CLSS public javax.swing.RepaintManager
+cons public init()
+meth public boolean isCompletelyDirty(javax.swing.JComponent)
+meth public boolean isDoubleBufferingEnabled()
+meth public java.awt.Dimension getDoubleBufferMaximumSize()
+meth public java.awt.Image getOffscreenBuffer(java.awt.Component,int,int)
+meth public java.awt.Image getVolatileOffscreenBuffer(java.awt.Component,int,int)
+meth public java.awt.Rectangle getDirtyRegion(javax.swing.JComponent)
+meth public java.lang.String toString()
+meth public static javax.swing.RepaintManager currentManager(java.awt.Component)
+meth public static javax.swing.RepaintManager currentManager(javax.swing.JComponent)
+meth public static void setCurrentManager(javax.swing.RepaintManager)
+meth public void addDirtyRegion(java.applet.Applet,int,int,int,int)
+meth public void addDirtyRegion(java.awt.Window,int,int,int,int)
+meth public void addDirtyRegion(javax.swing.JComponent,int,int,int,int)
+meth public void addInvalidComponent(javax.swing.JComponent)
+meth public void markCompletelyClean(javax.swing.JComponent)
+meth public void markCompletelyDirty(javax.swing.JComponent)
+meth public void paintDirtyRegions()
+meth public void removeInvalidComponent(javax.swing.JComponent)
+meth public void setDoubleBufferMaximumSize(java.awt.Dimension)
+meth public void setDoubleBufferingEnabled(boolean)
+meth public void validateInvalidComponents()
+supr java.lang.Object
+
 CLSS public abstract javax.swing.border.AbstractBorder
 cons public init()
 intf java.io.Serializable

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatClientProperties.java

@@ -17,8 +17,12 @@
 package com.formdev.flatlaf;
 
 import java.awt.Color;
+import java.awt.IllegalComponentStateException;
+import java.awt.Window;
 import java.util.Objects;
 import javax.swing.JComponent;
+import javax.swing.JFormattedTextField;
+import javax.swing.JSpinner;
 import javax.swing.SwingConstants;
 
 /**
@@ -31,7 +35,7 @@ public interface FlatClientProperties
 	//---- JButton ------------------------------------------------------------
 
 	/**
-	 * Specifies type of a button.
+	 * Specifies type of button.
 	 * <p>
 	 * <strong>Components</strong> {@link javax.swing.JButton} and {@link javax.swing.JToggleButton}<br>
 	 * <strong>Value type</strong> {@link java.lang.String}<br>
@@ -100,6 +104,17 @@ public interface FlatClientProperties
 	 */
 	String BUTTON_TYPE_BORDERLESS = "borderless";
 
+	/**
+	 * Specifies whether the button preferred size will be made square (quadratically).
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.JButton} and {@link javax.swing.JToggleButton}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 */
+	String SQUARE_SIZE = "JButton.squareSize";
+
+
+	//---- JCheckBox ----------------------------------------------------------
+
 	/**
 	 * Specifies selected state of a checkbox.
 	 * <p>
@@ -116,13 +131,6 @@ public interface FlatClientProperties
 	 */
 	String SELECTED_STATE_INDETERMINATE = "indeterminate";
 
-	/**
-	 * Specifies whether the button preferred size will be made square (quadratically).
-	 * <p>
-	 * <strong>Components</strong> {@link javax.swing.JButton} and {@link javax.swing.JToggleButton}<br>
-	 * <strong>Value type</strong> {@link java.lang.Boolean}
-	 */
-	String SQUARE_SIZE = "JButton.squareSize";
 
 	//---- JComponent ---------------------------------------------------------
 
@@ -214,6 +222,7 @@ public interface FlatClientProperties
 	 * <strong>Allowed Values</strong>
 	 *     {@link #OUTLINE_ERROR},
 	 *     {@link #OUTLINE_WARNING},
+	 *     {@link #OUTLINE_SUCCESS},
 	 *     any color (type {@link java.awt.Color}) or
 	 *     an array of two colors (type {@link java.awt.Color}[2]) where the first color
 	 *     is for focused state and the second for unfocused state
@@ -234,6 +243,14 @@ public interface FlatClientProperties
 	 */
 	String OUTLINE_WARNING = "warning";
 
+	/**
+	 * Paint the component border in another color (usually greenish) to indicate a success.
+	 *
+	 * @see #OUTLINE
+	 * @since 3.6
+	 */
+	String OUTLINE_SUCCESS = "success";
+
 	/**
 	 * Specifies a callback that is invoked to check whether a component is permanent focus owner.
 	 * Used to paint focus indicators.
@@ -254,18 +271,116 @@ public interface FlatClientProperties
 	String COMPONENT_FOCUS_OWNER = "JComponent.focusOwner";
 
 	/**
-	 * Specifies whether a component in an embedded menu bar should behave as caption
+	 * Specifies whether a component shown in a window title bar area should behave as caption
 	 * (left-click allows moving window, right-click shows window system menu).
-	 * The component does not receive mouse pressed/released/clicked/dragged events,
+	 * The caption component does not receive mouse pressed/released/clicked/dragged events,
 	 * but it gets mouse entered/exited/moved events.
 	 * <p>
+	 * Since 3.4, this client property also supports using a function that can check
+	 * whether a given location in the component should behave as caption.
+	 * Useful for components that do not use mouse input on whole component bounds.
+	 *
+	 * <pre>{@code
+	 * myComponent.putClientProperty( "JComponent.titleBarCaption",
+	 *     (Function<Point, Boolean>) pt -> {
+	 *         // parameter pt contains mouse location (in myComponent coordinates)
+	 *         // return true if the component is not interested in mouse input at the given location
+	 *         // return false if the component wants process mouse input at the given location
+	 *         // return null if the component children should be checked
+	 *         return ...; // check here
+	 *     } );
+	 * }</pre>
+	 * <b>Warning</b>:
+	 * <ul>
+	 *   <li>This function is invoked often when mouse is moved over window title bar area
+	 *       and should therefore return quickly.
+	 *   <li>This function is invoked on 'AWT-Windows' thread (not 'AWT-EventQueue' thread)
+	 *       while processing Windows messages.
+	 *       It <b>must not</b> change any component property or layout because this could cause a dead lock.
+	 * </ul>
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
-	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 * <strong>Value type</strong> {@link java.lang.Boolean} or {@link java.util.function.Function}&lt;Point, Boolean&gt;
 	 *
 	 * @since 2.5
 	 */
 	String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption";
 
+
+	//---- Panel --------------------------------------------------------------
+
+	/**
+	 * Marks the panel as placeholder for the iconfify/maximize/close buttons
+	 * in fullWindowContent mode. See {@link #FULL_WINDOW_CONTENT}.
+	 * <p>
+	 * If fullWindowContent mode is enabled, the preferred size of the panel is equal
+	 * to the size of the iconfify/maximize/close buttons. Otherwise is is {@code 0,0}.
+	 * <p>
+	 * You're responsible to layout that panel at the top-left or top-right corner,
+	 * depending on platform, where the iconfify/maximize/close buttons are located.
+	 * <p>
+	 * Syntax of the value string is: {@code "win|mac [horizontal|vertical] [zeroInFullScreen] [leftToRight|rightToLeft]"}.
+	 * <p>
+	 * The string must start with {@code "win"} (for Windows or Linux) or
+	 * with {@code "mac"} (for macOS) and specifies the platform where the placeholder
+	 * should be used. On macOS, you need the placeholder in the top-left corner,
+	 * but on Windows/Linux you need it in the top-right corner. So if your application supports
+	 * fullWindowContent mode on both platforms, you can add two placeholders to your layout
+	 * and FlatLaf automatically uses only one of them. The other gets size {@code 0,0}.
+	 * <p>
+	 * Optionally, you can append following options to the value string (separated by space characters):
+	 * <ul>
+	 *   <li>{@code "horizontal"} - preferred height is zero
+	 *   <li>{@code "vertical"} - preferred width is zero
+	 *   <li>{@code "zeroInFullScreen"} - in full-screen mode on macOS, preferred size is {@code 0,0}
+	 *   <li>{@code "leftToRight"} - in right-to-left component orientation, preferred size is {@code 0,0}
+	 *   <li>{@code "rightToLeft"} - in left-to-right component orientation, preferred size is {@code 0,0}
+	 * </ul>
+	 *
+	 * Example for adding placeholder to top-left corner on macOS:
+	 * <pre>{@code
+	 * JPanel placeholder = new JPanel();
+	 * placeholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac" );
+     *
+     * JToolBar toolBar = new JToolBar();
+     * // add tool bar items
+     *
+	 * JPanel toolBarPanel = new JPanel( new BorderLayout() );
+	 * toolBarPanel.add( placeholder, BorderLayout.WEST );
+	 * toolBarPanel.add( toolBar, BorderLayout.CENTER );
+	 *
+	 * frame.getContentPane().add( toolBarPanel, BorderLayout.NORTH );
+	 * }</pre>
+	 *
+	 * Or add placeholder as first item to the tool bar:
+	 * <pre>{@code
+	 * JPanel placeholder = new JPanel();
+	 * placeholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac" );
+	 *
+	 * JToolBar toolBar = new JToolBar();
+	 * toolBar.add( placeholder );
+	 * // add tool bar items
+	 *
+	 * frame.getContentPane().add( toolBar, BorderLayout.NORTH );
+	 * }</pre>
+	 *
+	 * If a tabbed pane is located at the top, you can add the placeholder
+	 * as leading component to that tabbed pane:
+	 * <pre>{@code
+	 * JPanel placeholder = new JPanel();
+	 * placeholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac" );
+	 *
+	 * tabbedPane.putClientProperty( FlatClientProperties.TABBED_PANE_LEADING_COMPONENT, placeholder );
+	 * }</pre>
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JPanel}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}
+	 *
+	 * @since 3.4
+	 */
+	String FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER = "FlatLaf.fullWindowContent.buttonsPlaceholder";
+
+
 	//---- Popup --------------------------------------------------------------
 
 	/**
@@ -274,12 +389,13 @@ public interface FlatClientProperties
 	 * <p>
 	 * Note that this is not available on all platforms since it requires special support.
 	 * Supported platforms:
-	 * <p>
-	 * <strong>Windows 11</strong> (x86 or x86_64): Only two corner radiuses are supported
-	 * by the OS: {@code DWMWCP_ROUND} is 8px and {@code DWMWCP_ROUNDSMALL} is 4px.
-	 * If this value is {@code 1 - 4}, then {@code DWMWCP_ROUNDSMALL} is used.
-	 * If it is {@code >= 5}, then {@code DWMWCP_ROUND} is used.
-	 * <p>
+	 * <ul>
+	 * <li><strong>Windows 11</strong>: Only two corner radiuses are supported
+	 *     by the OS: {@code DWMWCP_ROUND} is 8px and {@code DWMWCP_ROUNDSMALL} is 4px.
+	 *     If this value is {@code 1 - 4}, then {@code DWMWCP_ROUNDSMALL} is used.
+	 *     If it is {@code >= 5}, then {@code DWMWCP_ROUND} is used.
+	 * <li><strong>macOS</strong> (10.14 and later): Any corner radius is supported.
+	 * </ul>
 	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
 	 * <strong>Value type</strong> {@link java.lang.Integer}<br>
 	 *
@@ -287,6 +403,24 @@ public interface FlatClientProperties
 	 */
 	String POPUP_BORDER_CORNER_RADIUS = "Popup.borderCornerRadius";
 
+	/**
+	 * Specifies the popup rounded border width if the component is shown in a popup
+	 * or if the component is the owner of another component that is shown in a popup.
+	 * <p>
+	 * Only used if popup uses rounded border.
+	 * <p>
+	 * Note that this is not available on all platforms since it requires special support.
+	 * Supported platforms:
+	 * <ul>
+	 * <li><strong>macOS</strong> (10.14 and later)
+	 * </ul>
+	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
+	 * <strong>Value type</strong> {@link java.lang.Integer} or {@link java.lang.Float}<br>
+	 *
+	 * @since 3.3
+	 */
+	String POPUP_ROUNDED_BORDER_WIDTH = "Popup.roundedBorderWidth";
+
 	/**
 	 * Specifies whether a drop shadow is painted if the component is shown in a popup
 	 * or if the component is the owner of another component that is shown in a popup.
@@ -305,6 +439,7 @@ public interface FlatClientProperties
 	 */
 	String POPUP_FORCE_HEAVY_WEIGHT = "Popup.forceHeavyWeight";
 
+
 	//---- JProgressBar -------------------------------------------------------
 
 	/**
@@ -323,6 +458,7 @@ public interface FlatClientProperties
 	 */
 	String PROGRESS_BAR_SQUARE = "JProgressBar.square";
 
+
 	//---- JRootPane ----------------------------------------------------------
 
 	/**
@@ -336,7 +472,7 @@ public interface FlatClientProperties
 	 * {@link FlatSystemProperties#USE_WINDOW_DECORATIONS}, but higher priority
 	 * than UI default {@code TitlePane.useWindowDecorations}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -356,13 +492,55 @@ public interface FlatClientProperties
 	 * {@link FlatSystemProperties#MENUBAR_EMBEDDED}, but higher priority
 	 * than UI default {@code TitlePane.menuBarEmbedded}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 */
 	String MENU_BAR_EMBEDDED = "JRootPane.menuBarEmbedded";
 
+	/**
+	 * Specifies whether the content pane (and the glass pane) should be extended
+	 * into the window title bar area
+	 * (requires enabled window decorations). Default is {@code false}.
+	 * <p>
+	 * On macOS, use client property {@code apple.awt.fullWindowContent}
+	 * (see <a href="https://www.formdev.com/flatlaf/macos/#full_window_content">macOS Full window content</a>).
+	 * <p>
+	 * Setting this enables/disables full window content
+	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
+	 * <p>
+	 * If {@code true}, the content pane (and the glass pane) is extended into
+	 * the title bar area. The window icon and title are hidden.
+	 * Only the iconfify/maximize/close buttons stay visible in the upper right corner
+	 * (and overlap the content pane).
+	 * <p>
+	 * The user can left-click-and-drag on the title bar area to move the window,
+	 * except when clicking on a component that processes mouse events (e.g. buttons or menus).
+	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3.4
+	 */
+	String FULL_WINDOW_CONTENT = "FlatLaf.fullWindowContent";
+
+	/**
+	 * Contains the current bounds of the iconfify/maximize/close buttons
+	 * (in root pane coordinates) if fullWindowContent mode is enabled.
+	 * Otherwise its value is {@code null}.
+	 * <p>
+	 * <b>Note</b>: Do not set this client property. It is set by FlatLaf.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.awt.Rectangle}
+	 *
+	 * @since 3.4
+	 */
+	String FULL_WINDOW_CONTENT_BUTTONS_BOUNDS = "FlatLaf.fullWindowContent.buttonsBounds";
+
 	/**
 	 * Specifies whether the window icon should be shown in the window title bar
 	 * (requires enabled window decorations). Default is UI property {@code TitlePane.showIcon}.
@@ -372,7 +550,7 @@ public interface FlatClientProperties
 	 * <p>
 	 * This client property has higher priority than UI default {@code TitlePane.showIcon}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -388,6 +566,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the windows title
 	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -396,12 +576,14 @@ public interface FlatClientProperties
 	String TITLE_BAR_SHOW_TITLE = "JRootPane.titleBarShowTitle";
 
 	/**
-	 * Specifies whether the "iconfify" button should be shown in the window title bar
+	 * Specifies whether the "iconify" button should be shown in the window title bar
 	 * (requires enabled window decorations). Default is {@code true}.
 	 * <p>
-	 * Setting this shows/hides the "iconfify" button
+	 * Setting this shows/hides the "iconify" button
 	 * for the {@code JFrame} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -416,6 +598,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "maximize/restore" button
 	 * for the {@code JFrame} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -430,6 +614,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "close" button
 	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -440,7 +626,7 @@ public interface FlatClientProperties
 	/**
 	 * Background color of window title bar (requires enabled window decorations).
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.awt.Color}
@@ -452,7 +638,7 @@ public interface FlatClientProperties
 	/**
 	 * Foreground color of window title bar (requires enabled window decorations).
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.awt.Color}
@@ -461,10 +647,24 @@ public interface FlatClientProperties
 	 */
 	String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground";
 
+	/**
+	 * Specifies the preferred height of title bar (requires enabled window decorations).
+	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Integer}
+	 *
+	 * @since 3.5.2
+	 */
+	String TITLE_BAR_HEIGHT = "JRootPane.titleBarHeight";
+
 	/**
 	 * Specifies whether the glass pane should have full height and overlap the title bar,
 	 * if FlatLaf window decorations are enabled. Default is {@code false}.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -472,6 +672,37 @@ public interface FlatClientProperties
 	 */
 	String GLASS_PANE_FULL_HEIGHT = "JRootPane.glassPaneFullHeight";
 
+	/**
+	 * Specifies the style of the window title bar.
+	 * Besides the default title bar style, you can use a Utility-style title bar,
+	 * which is smaller than the default title bar.
+	 * <p>
+	 * On Windows 10/11, this requires FlatLaf window decorations.
+	 * On macOS, Java supports this out of the box.
+	 * <p>
+	 * Note that this client property must be set before the window becomes displayable.
+	 * Otherwise, an {@link IllegalComponentStateException} is thrown.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}<br>
+	 * <strong>Allowed Values</strong>
+	 *     {@link #WINDOW_STYLE_SMALL}
+	 *
+	 * @since 3.2
+	 */
+	String WINDOW_STYLE = "Window.style";
+
+	/**
+	 * The window has Utility-style title bar, which is smaller than default title bar.
+	 * <p>
+	 * This is the same as using {@link Window#setType}( {@link Window.Type#UTILITY} ).
+	 *
+	 * @see #WINDOW_STYLE
+	 * @since 3.2
+	 */
+	String WINDOW_STYLE_SMALL = "small";
+
+
 	//---- JScrollBar / JScrollPane -------------------------------------------
 
 	/**
@@ -490,6 +721,7 @@ public interface FlatClientProperties
 	 */
 	String SCROLL_PANE_SMOOTH_SCROLLING = "JScrollPane.smoothScrolling";
 
+
 	//---- JSplitPane ---------------------------------------------------------
 
 	/**
@@ -524,6 +756,7 @@ public interface FlatClientProperties
 	 */
 	String SPLIT_PANE_EXPANDABLE_SIDE_RIGHT = "right";
 
+
 	//---- JTabbedPane --------------------------------------------------------
 
 	/**
@@ -789,7 +1022,7 @@ public interface FlatClientProperties
 	 * <strong>Component</strong> {@link javax.swing.JTabbedPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Integer} or {@link java.lang.String}<br>
 	 * <strong>Allowed Values</strong>
-	 *     {@link SwingConstants#LEADING} (default)
+	 *     {@link SwingConstants#LEADING} (default),
 	 *     {@link SwingConstants#TRAILING},
 	 *     {@link SwingConstants#CENTER},
 	 *     {@link #TABBED_PANE_ALIGN_LEADING} (default),
@@ -853,8 +1086,9 @@ public interface FlatClientProperties
 	 * <strong>Value type</strong> {@link java.lang.String}<br>
 	 * <strong>Allowed Values</strong>
 	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_PREFERRED} (default),
-	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_EQUAL} or
-	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_COMPACT}
+	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_EQUAL},
+	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_COMPACT} or
+	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY}
 	 */
 	String TABBED_PANE_TAB_WIDTH_MODE = "JTabbedPane.tabWidthMode";
 
@@ -880,6 +1114,14 @@ public interface FlatClientProperties
 	 */
 	String TABBED_PANE_TAB_WIDTH_MODE_COMPACT = "compact";
 
+	/**
+	 * All tabs are smaller because they show only the tab icon, but no tab title.
+	 *
+	 * @see #TABBED_PANE_TAB_WIDTH_MODE
+	 * @since 3.7
+	 */
+	String TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY = "iconOnly";
+
 	/**
 	 * Specifies the tab icon placement (relative to tab title).
 	 * <p>
@@ -893,6 +1135,59 @@ public interface FlatClientProperties
 	 */
 	String TABBED_PANE_TAB_ICON_PLACEMENT = "JTabbedPane.tabIconPlacement";
 
+	/**
+	 * Specifies the rotation of the tabs (title, icon, etc.).
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JTabbedPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Integer} or {@link java.lang.String}<br>
+	 * <strong>Allowed Values</strong>
+	 *     {@link SwingConstants#LEFT},
+	 *     {@link SwingConstants#RIGHT},
+	 *     {@link #TABBED_PANE_TAB_ROTATION_NONE} (default),
+	 *     {@link #TABBED_PANE_TAB_ROTATION_AUTO},
+	 *     {@link #TABBED_PANE_TAB_ROTATION_LEFT} or
+	 *     {@link #TABBED_PANE_TAB_ROTATION_RIGHT}
+	 *
+	 * @since 3.3
+	 */
+	String TABBED_PANE_TAB_ROTATION = "JTabbedPane.tabRotation";
+
+	/**
+	 * Tabs are not rotated.
+	 *
+	 * @see #TABBED_PANE_TAB_ROTATION
+	 * @since 3.3
+	 */
+	String TABBED_PANE_TAB_ROTATION_NONE = "none";
+
+	/**
+	 * Tabs are rotated depending on tab placement.
+	 * <p>
+	 * For top and bottom tab placement, the tabs are not rotated.<br>
+	 * For left tab placement, the tabs are rotated counter-clockwise.<br>
+	 * For right tab placement, the tabs are rotated clockwise.
+	 *
+	 * @see #TABBED_PANE_TAB_ROTATION
+	 * @since 3.3
+	 */
+	String TABBED_PANE_TAB_ROTATION_AUTO = "auto";
+
+	/**
+	 * Tabs are rotated counter-clockwise.
+	 *
+	 * @see #TABBED_PANE_TAB_ROTATION
+	 * @since 3.3
+	 */
+	String TABBED_PANE_TAB_ROTATION_LEFT = "left";
+
+	/**
+	 * Tabs are rotated clockwise.
+	 *
+	 * @see #TABBED_PANE_TAB_ROTATION
+	 * @since 3.3
+	 */
+	String TABBED_PANE_TAB_ROTATION_RIGHT = "right";
+
 	/**
 	 * Specifies a component that will be placed at the leading edge of the tabs area.
 	 * <p>
@@ -919,17 +1214,21 @@ public interface FlatClientProperties
 	 */
 	String TABBED_PANE_TRAILING_COMPONENT = "JTabbedPane.trailingComponent";
 
+
 	//---- JTextField ---------------------------------------------------------
 
 	/**
 	 * Specifies whether all text is selected when the text component gains focus.
 	 * <p>
-	 * <strong>Component</strong> {@link javax.swing.JTextField} (and subclasses)<br>
+	 * <strong>Components</strong> {@link javax.swing.text.JTextComponent} (and subclasses),
+	 * {@link javax.swing.JComboBox} (since 3.6) and {@link javax.swing.JSpinner} (since 3.6)<br>
 	 * <strong>Value type</strong> {@link java.lang.String}<br>
 	 * <strong>Allowed Values</strong>
 	 *     {@link #SELECT_ALL_ON_FOCUS_POLICY_NEVER},
 	 *     {@link #SELECT_ALL_ON_FOCUS_POLICY_ONCE} (default) or
 	 *     {@link #SELECT_ALL_ON_FOCUS_POLICY_ALWAYS}
+	 *
+	 * @see #SELECT_ALL_ON_MOUSE_CLICK
 	 */
 	String SELECT_ALL_ON_FOCUS_POLICY = "JTextField.selectAllOnFocusPolicy";
 
@@ -944,6 +1243,12 @@ public interface FlatClientProperties
 	 * Select all text when the text component gains focus for the first time
 	 * and selection was not modified (is at end of text).
 	 * This is the default.
+	 * <p>
+	 * <b>Limitations:</b>
+	 * For {@link JFormattedTextField} and {@link JSpinner} this behaves
+	 * as {@link #SELECT_ALL_ON_FOCUS_POLICY_ALWAYS}.
+     * This is because of special behavior of {@link JFormattedTextField}
+     * that did not allow implementation of {@code "once"}.
 	 *
 	 * @see #SELECT_ALL_ON_FOCUS_POLICY
 	 */
@@ -956,6 +1261,19 @@ public interface FlatClientProperties
 	 */
 	String SELECT_ALL_ON_FOCUS_POLICY_ALWAYS = "always";
 
+	/**
+	 * Specifies whether all text is selected when when clicking with the mouse
+	 * into the text field (and if "select all on focus" policy is enabled).
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.text.JTextComponent} (and subclasses),
+	 * {@link javax.swing.JComboBox} and {@link javax.swing.JSpinner}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @see #SELECT_ALL_ON_FOCUS_POLICY
+	 * @since 3.6
+	 */
+	String SELECT_ALL_ON_MOUSE_CLICK = "JTextField.selectAllOnMouseClick";
+
 	/**
 	 * Placeholder text that is only painted if the text field is empty.
 	 * <p>
@@ -1088,6 +1406,7 @@ public interface FlatClientProperties
 	 */
 	String TEXT_FIELD_CLEAR_CALLBACK = "JTextField.clearCallback";
 
+
 	//---- JToggleButton ------------------------------------------------------
 
 	/**
@@ -1095,8 +1414,8 @@ public interface FlatClientProperties
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JToggleButton}<br>
 	 * <strong>Value type</strong> {@link java.lang.Integer}<br>
-	 * <strong>SupportedValues:</strong>
-	 *     {@link SwingConstants#BOTTOM} (default)
+	 * <strong>Allowed Values</strong>
+	 *     {@link SwingConstants#BOTTOM} (default),
 	 *     {@link SwingConstants#TOP},
 	 *     {@link SwingConstants#LEFT} or
 	 *     {@link SwingConstants#RIGHT}
@@ -1129,16 +1448,27 @@ public interface FlatClientProperties
 	 */
 	String TAB_BUTTON_SELECTED_BACKGROUND = "JToggleButton.tab.selectedBackground";
 
+
 	//---- JTree --------------------------------------------------------------
 
 	/**
-	 * Override if a tree shows a wide selection. Default is {@code true}.
+	 * Specifies whether tree shows a wide selection. Default is {@code true}.
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JTree}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 */
 	String TREE_WIDE_SELECTION = "JTree.wideSelection";
 
+	/**
+	 * Specifies whether tree uses a wide cell renderer. Default is {@code false}.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JTree}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3.6
+	 */
+	String TREE_WIDE_CELL_RENDERER = "JTree.wideCellRenderer";
+
 	/**
 	 * Specifies whether tree item selection is painted. Default is {@code true}.
 	 * If set to {@code false}, then the tree cell renderer is responsible for painting selection.
@@ -1148,6 +1478,45 @@ public interface FlatClientProperties
 	 */
 	String TREE_PAINT_SELECTION = "JTree.paintSelection";
 
+
+	//---- macOS --------------------------------------------------------------
+
+	/**
+	 * Specifies the spacing around the macOS window close/minimize/zoom buttons.
+	 * Useful if <a href="https://www.formdev.com/flatlaf/macos/#full_window_content">full window content</a>
+	 * is enabled.
+	 * <p>
+	 * (requires macOS 10.14+ for "medium" spacing and macOS 11+ for "large" spacing, requires Java 17+)
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}<br>
+	 * <strong>Allowed Values</strong>
+	 *     {@link #MACOS_WINDOW_BUTTONS_SPACING_MEDIUM} or
+	 *     {@link #MACOS_WINDOW_BUTTONS_SPACING_LARGE} (requires macOS 11+)
+	 *
+	 * @since 3.4
+	 */
+	String MACOS_WINDOW_BUTTONS_SPACING = "FlatLaf.macOS.windowButtonsSpacing";
+
+	/**
+	 * Add medium spacing around the macOS window close/minimize/zoom buttons.
+	 *
+	 * @see #MACOS_WINDOW_BUTTONS_SPACING
+	 * @since 3.4
+	 */
+	String MACOS_WINDOW_BUTTONS_SPACING_MEDIUM = "medium";
+
+	/**
+	 * Add large spacing around the macOS window close/minimize/zoom buttons.
+	 * <p>
+	 * (requires macOS 11+; "medium" is used on older systems)
+	 *
+	 * @see #MACOS_WINDOW_BUTTONS_SPACING
+	 * @since 3.4
+	 */
+	String MACOS_WINDOW_BUTTONS_SPACING_LARGE = "large";
+
+
 	//---- helper methods -----------------------------------------------------
 
 	/**

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatDefaultsAddon.java

@@ -48,7 +48,7 @@ public abstract class FlatDefaultsAddon
 	public InputStream getDefaults( Class<?> lafClass ) {
 		Class<?> addonClass = this.getClass();
 		String propertiesName = '/' + addonClass.getPackage().getName().replace( '.', '/' )
-			+ '/' + lafClass.getSimpleName() + ".properties";
+			+ '/' + UIDefaultsLoader.simpleClassName( lafClass ) + ".properties";
 		return addonClass.getResourceAsStream( propertiesName );
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatInputMaps.java

@@ -50,7 +50,8 @@ class FlatInputMaps
 		}
 
 		modifyInputMap( defaults, "ComboBox.ancestorInputMap",
-			"SPACE", "spacePopup",
+// Space key still shows popup, but from FlatComboBoxUI.FlatKeySelectionManager
+//			"SPACE", "spacePopup",
 
 			"UP", mac( "selectPrevious2", "selectPrevious" ),
 			"DOWN", mac( "selectNext2", "selectNext" ),
@@ -70,7 +71,7 @@ class FlatInputMaps
 			);
 		}
 
-		// join ltr and rtl bindings to fix up/down/etc keys in right-to-left component orientation
+		// join ltr and rtl bindings to fix up/down/etc. keys in right-to-left component orientation
 		Object[] bindings = (Object[]) defaults.get( "PopupMenu.selectedWindowInputMapBindings" );
 		Object[] rtlBindings = (Object[]) defaults.get( "PopupMenu.selectedWindowInputMapBindings.RightToLeft" );
 		if( bindings != null && rtlBindings != null ) {

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatLaf.java

@@ -20,6 +20,7 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.EventQueue;
 import java.awt.Font;
+import java.awt.GraphicsEnvironment;
 import java.awt.Image;
 import java.awt.RenderingHints;
 import java.awt.Toolkit;
@@ -30,15 +31,13 @@ import java.awt.image.ImageProducer;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.io.File;
-import java.lang.invoke.MethodHandle;
-import java.lang.invoke.MethodHandles;
-import java.lang.invoke.MethodType;
 import java.lang.reflect.Method;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -46,6 +45,7 @@ import java.util.MissingResourceException;
 import java.util.Properties;
 import java.util.ResourceBundle;
 import java.util.ServiceLoader;
+import java.util.Set;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.IntUnaryOperator;
@@ -71,12 +71,14 @@ import javax.swing.plaf.FontUIResource;
 import javax.swing.plaf.IconUIResource;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicLookAndFeel;
+import javax.swing.plaf.metal.MetalLookAndFeel;
 import javax.swing.text.StyleContext;
 import javax.swing.text.html.HTMLEditorKit;
 import com.formdev.flatlaf.ui.FlatNativeWindowBorder;
 import com.formdev.flatlaf.ui.FlatPopupFactory;
 import com.formdev.flatlaf.ui.FlatRootPaneUI;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.ui.JavaCompatibility2;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.FontUtils;
 import com.formdev.flatlaf.util.GrayFilter;
@@ -100,6 +102,8 @@ public abstract class FlatLaf
 	private static Map<String, String> globalExtraDefaults;
 	private Map<String, String> extraDefaults;
 	private static Function<String, Color> systemColorGetter;
+	private static Set<String> uiKeyPlatformPrefixes;
+	private static Set<String> uiKeySpecialPrefixes;
 
 	private String desktopPropertyName;
 	private String desktopPropertyName2;
@@ -111,6 +115,7 @@ public abstract class FlatLaf
 	private PopupFactory oldPopupFactory;
 	private MnemonicHandler mnemonicHandler;
 	private boolean subMenuUsabilityHelperInstalled;
+	private LinuxPopupMenuCanceler linuxPopupMenuCanceler;
 
 	private Consumer<UIDefaults> postInitialization;
 	private List<Function<Object, Object>> uiDefaultsGetters;
@@ -120,6 +125,46 @@ public abstract class FlatLaf
 	private static String preferredSemiboldFontFamily;
 	private static String preferredMonospacedFontFamily;
 
+	static {
+		// see disableWindowsD3Donscreen() for details
+		// https://github.com/JFormDesigner/FlatLaf/issues/887
+		if( SystemInfo.isWindows &&
+			System.getProperty( "sun.java2d.d3d.onscreen" ) == null &&
+			System.getProperty( "sun.java2d.d3d" ) == null &&
+			System.getProperty( "sun.java2d.noddraw" ) == null )
+		  System.setProperty( "sun.java2d.d3d.onscreen", "false" );
+	}
+
+	/**
+	 * Disable usage of Windows Direct3D (DirectX) onscreen surfaces because this may lead to
+	 * repaint issues (ghosting) on some systems (probably depending on graphics card/driver).
+	 * Problem occurs usually when a small heavy-weight popup window (menu, combobox, tooltip) is shown.
+	 * <p>
+	 * Sets system property {@code sun.java2d.d3d.onscreen} to {@code false},
+	 * but only if {@code sun.java2d.d3d.onscreen}, {@code sun.java2d.d3d}
+	 * and {@code sun.java2d.noddraw} are not yet set.
+	 * <p>
+	 * <strong>Note</strong>: Must be invoked very early before the graphics environment is created.
+	 * <p>
+	 * This method is automatically invoked when loading this class,
+	 * which is usually before the graphics environment is created.
+	 * E.g. when doing {@code FlatLightLaf.setup()} or
+	 * {@code UIManager.setLookAndFeel( "com.formdev.flatlaf.FlatLightLaf" )}.
+	 * <p>
+	 * However, it may be invoked too late if you use some methods from {@link UIManager}
+	 * of {@link GraphicsEnvironment} before setting look and feel.
+	 * E.g. {@link UIManager#put(Object, Object)}.
+	 * In that case invoke this method yourself very early.
+	 * <p>
+	 * <strong>Tip</strong>: How to find out when the graphics environment is created?
+	 * Set a breakpoint at constructor of class {@link GraphicsEnvironment} and look at the stack.
+	 *
+	 * @since 3.5.2
+	 */
+	public static void disableWindowsD3Donscreen() {
+		// dummy method used to trigger invocation of "static {...}" block
+	}
+
 	/**
 	 * Sets the application look and feel to the given LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
@@ -182,17 +227,11 @@ public abstract class FlatLaf
 	 * This depends on the operating system and on the used Java runtime.
 	 * <p>
 	 * This method returns {@code true} on Windows 10/11 (see exception below)
-	 * and on Linux, {@code false} otherwise.
+	 * and on Linux, otherwise returns {@code false}.
+	 * <p>
+	 * Returns also {@code false} on Windows 10/11 if
+	 * FlatLaf native window border support is available (requires Windows 10/11).
 	 * <p>
-	 * Returns also {@code false} on Windows 10/11 if:
-	 * <ul>
-	 * <li>FlatLaf native window border support is available (requires Windows 10/11)</li>
-	 * <li>running in
-	 * <a href="https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime">JetBrains Runtime 11 (or later)</a>
-	 * (<a href="https://github.com/JetBrains/JetBrainsRuntime">source code on github</a>)
-	 * and JBR supports custom window decorations
-	 * </li>
-	 * </ul>
 	 * In these cases, custom decorations are enabled by the root pane.
 	 * Usage of {@link JFrame#setDefaultLookAndFeelDecorated(boolean)} or
 	 * {@link JDialog#setDefaultLookAndFeelDecorated(boolean)} is not necessary.
@@ -271,6 +310,10 @@ public abstract class FlatLaf
 		// install submenu usability helper
 		subMenuUsabilityHelperInstalled = SubMenuUsabilityHelper.install();
 
+		// install Linux popup menu canceler
+		if( SystemInfo.isLinux )
+			linuxPopupMenuCanceler = new LinuxPopupMenuCanceler();
+
 		// listen to desktop property changes to update UI if system font or scaling changes
 		if( SystemInfo.isWindows ) {
 			// Windows 10 allows increasing font size independent of scaling:
@@ -325,6 +368,22 @@ public abstract class FlatLaf
 					String.format( "a, address { color: #%06x; }", linkColor.getRGB() & 0xffffff ) );
 			}
 		};
+
+		// Initialize UIScale user scale factor immediately after FlatLaf was activated,
+		// which is necessary to ensure that UIScale.setZoomFactor(float)
+		// scales FlatLaf defaultDont correctly even if UIScale.scale() was not yet used.
+		// In other words: Without this, UIScale.setZoomFactor(float) would
+		// not work correctly if invoked between FlatLaf.setup() and crating UI.
+		PropertyChangeListener listener = new PropertyChangeListener() {
+			@Override
+			public void propertyChange( PropertyChangeEvent e ) {
+				if( "lookAndFeel".equals( e.getPropertyName() ) ) {
+					UIManager.removePropertyChangeListener( this );
+					UIScale.getUserScaleFactor();
+				}
+			}
+		};
+		UIManager.addPropertyChangeListener( listener );
 	}
 
 	@Override
@@ -363,6 +422,12 @@ public abstract class FlatLaf
 			subMenuUsabilityHelperInstalled = false;
 		}
 
+		// uninstall Linux popup menu canceler
+		if( linuxPopupMenuCanceler != null ) {
+			linuxPopupMenuCanceler.uninstall();
+			linuxPopupMenuCanceler = null;
+		}
+
 		// restore default link color
 		new HTMLEditorKit().getStyleSheet().addRule( "a, address { color: blue; }" );
 		postInitialization = null;
@@ -391,7 +456,7 @@ public abstract class FlatLaf
 				Method m = UIManager.class.getMethod( "createLookAndFeel", String.class );
 				aquaLaf = (BasicLookAndFeel) m.invoke( null, "Mac OS X" );
 			} else
-				aquaLaf = (BasicLookAndFeel) Class.forName( aquaLafClassName ).getDeclaredConstructor().newInstance();
+				aquaLaf = Class.forName( aquaLafClassName ).asSubclass( BasicLookAndFeel.class ).getDeclaredConstructor().newInstance();
 		} catch( Exception ex ) {
 			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to initialize Aqua look and feel '" + aquaLafClassName + "'.", ex );
 			throw new IllegalStateException();
@@ -476,10 +541,10 @@ public abstract class FlatLaf
 
 		// load defaults from properties
 		List<Class<?>> lafClassesForDefaultsLoading = getLafClassesForDefaultsLoading();
-		if( lafClassesForDefaultsLoading != null )
-			UIDefaultsLoader.loadDefaultsFromProperties( lafClassesForDefaultsLoading, addons, getAdditionalDefaults(), isDark(), defaults );
-		else
-			UIDefaultsLoader.loadDefaultsFromProperties( getClass(), addons, getAdditionalDefaults(), isDark(), defaults );
+		if( lafClassesForDefaultsLoading == null )
+			lafClassesForDefaultsLoading = UIDefaultsLoader.getLafClassesForDefaultsLoading( getClass() );
+		UIDefaultsLoader.loadDefaultsFromProperties( lafClassesForDefaultsLoading, addons,
+			this::applyAdditionalProperties, getAdditionalDefaults(), isDark(), defaults );
 
 		// setup default font after loading defaults from properties
 		// to allow defining "defaultFont" in properties
@@ -496,9 +561,6 @@ public abstract class FlatLaf
 		// initialize text antialiasing
 		putAATextInfo( defaults );
 
-		// apply additional defaults (e.g. from IntelliJ themes)
-		applyAdditionalDefaults( defaults );
-
 		// allow addons modifying UI defaults
 		for( FlatDefaultsAddon addon : addons )
 			addon.afterDefaultsLoading( this, defaults );
@@ -508,6 +570,9 @@ public abstract class FlatLaf
 			return UIScale.getUserScaleFactor();
 		} );
 
+		// add lazy UI delegate class loading (if necessary)
+		addLazyUIdelegateClassLoading( defaults );
+
 		if( postInitialization != null ) {
 			postInitialization.accept( defaults );
 			postInitialization = null;
@@ -516,7 +581,8 @@ public abstract class FlatLaf
 		return defaults;
 	}
 
-	void applyAdditionalDefaults( UIDefaults defaults ) {
+	// apply additional properties (e.g. from IntelliJ themes)
+	void applyAdditionalProperties( Properties properties ) {
 	}
 
 	protected List<Class<?>> getLafClassesForDefaultsLoading() {
@@ -543,7 +609,7 @@ public abstract class FlatLaf
 		// which can happen in applications that use some plugin system
 		// and load FlatLaf in a plugin that uses its own classloader.
 		// (e.g. Apache NetBeans)
-		if( defaults.get( "FileChooser.fileNameHeaderText" ) != null )
+		if( defaults.get( "TabbedPane.moreTabsButtonToolTipText" ) != null )
 			return;
 
 		// load FlatLaf resource bundle and add content to defaults
@@ -581,10 +647,13 @@ public abstract class FlatLaf
 		Object activeFont = new ActiveFont( null, null, -1, 0, 0, 0, 0 );
 
 		// override fonts
+		List<String> fontKeys = new ArrayList<>( 50 );
 		for( Object key : defaults.keySet() ) {
 			if( key instanceof String && (((String)key).endsWith( ".font" ) || ((String)key).endsWith( "Font" )) )
-				defaults.put( key, activeFont );
+				fontKeys.add( (String) key );
 		}
+		for( String key : fontKeys )
+			defaults.put( key, activeFont );
 
 		// add fonts that are not set in BasicLookAndFeel
 		defaults.put( "RootPane.font", activeFont );
@@ -654,11 +723,22 @@ public abstract class FlatLaf
 			uiFont = ((ActiveFont)defaultFont).derive( baseFont, fontSize -> {
 				return Math.round( fontSize * UIScale.computeFontScaleFactor( baseFont ) );
 			} );
-		}
+		} else if( defaultFont instanceof LazyValue )
+			uiFont = ActiveFont.toUIResource( (Font) ((LazyValue)defaultFont).createValue( defaults ) );
 
 		// increase font size if system property "flatlaf.uiScale" is set
 		uiFont = UIScale.applyCustomScaleFactor( uiFont );
 
+		// apply zoom factor to font size
+		float zoomFactor = UIScale.getZoomFactor();
+		if( zoomFactor != 1 ) {
+			// see also UIScale.setZoomFactor()
+			int unzoomedFontSize = uiFont.getSize();
+			defaults.put( "defaultFont.unzoomedSize", unzoomedFontSize );
+			int newFontSize = Math.max( Math.round( unzoomedFontSize * zoomFactor ), 1 );
+			uiFont = new FontUIResource( uiFont.deriveFont( (float) newFontSize ) );
+		}
+
 		// set default font
 		defaults.put( "defaultFont", uiFont );
 	}
@@ -702,6 +782,53 @@ public abstract class FlatLaf
 		}
 	}
 
+	/**
+	 * Handle UI delegate classes if running in special application where multiple class loaders are involved.
+	 * E.g. in Eclipse plugin or in LibreOffice extension.
+	 * <p>
+	 * Problem: Swing runs in Java's system classloader and FlatLaf is loaded in plugin classloader.
+	 * When Swing tries to load UI delegate class in {@link UIDefaults#getUIClass(String, ClassLoader)},
+	 * invoked from {@link UIDefaults#getUI(JComponent)}, it uses the component's classloader,
+	 * which is Java's system classloader for core Swing components,
+	 * and can not find FlatLaf UI delegates.
+	 * <p>
+	 * Solution: Add lazy values for UI delegate class names.
+	 * Those lazy values use FlatLaf classloader to load UI delegate class.
+	 * This is similar to what {@link UIDefaults#getUIClass(String, ClassLoader)} does.
+	 * <p>
+	 * Not using {@code defaults.put( "ClassLoader", FlatLaf.class.getClassLoader() )},
+	 * which would work for FlatLaf UI delegates, but it would break custom
+	 * UI delegates used in other classloaders.
+	 */
+	private static void addLazyUIdelegateClassLoading( UIDefaults defaults ) {
+		if( FlatLaf.class.getClassLoader() == ClassLoader.getSystemClassLoader() )
+			return; // not necessary
+
+		Map<String, LazyValue> map = new HashMap<>();
+		for( Map.Entry<Object, Object> e : defaults.entrySet() ) {
+			Object key = e.getKey();
+			Object value = e.getValue();
+			if( key instanceof String && ((String)key).endsWith( "UI" ) &&
+				value instanceof String && !defaults.containsKey( value ) )
+			{
+				String className = (String) value;
+				map.put( className, (LazyValue) t -> {
+					try {
+						Class<?> uiClass = FlatLaf.class.getClassLoader().loadClass( className );
+						if( ComponentUI.class.isAssignableFrom( uiClass ) )
+							return uiClass;
+					} catch( ClassNotFoundException ex ) {
+						// ignore
+					}
+
+					// let UIDefaults.getUIClass() try to load UI delegate class
+					return null;
+				} );
+			}
+		}
+		defaults.putAll( map );
+	}
+
 	private void putAATextInfo( UIDefaults defaults ) {
 		if ( SystemInfo.isMacOS && SystemInfo.isJetBrainsJVM ) {
 			// The awt.font.desktophints property suggests sub-pixel anti-aliasing
@@ -811,8 +938,7 @@ public abstract class FlatLaf
 	 * <p>
 	 * Invoke this method before setting the look and feel.
 	 * <p>
-	 * If using Java modules, the package must be opened in {@code module-info.java}.
-	 * Otherwise, use {@link #registerCustomDefaultsSource(URL)}.
+	 * If using Java modules, it is not necessary to open the package in {@code module-info.java}.
 	 *
 	 * @param packageName a package name (e.g. "com.myapp.resources")
 	 */
@@ -859,9 +985,9 @@ public abstract class FlatLaf
 	 * <p>
 	 * See {@link #registerCustomDefaultsSource(String)} for details.
 	 * <p>
-	 * This method is useful if using Java modules and the package containing the properties files
-	 * is not opened in {@code module-info.java}.
 	 * E.g. {@code FlatLaf.registerCustomDefaultsSource( MyApp.class.getResource( "/com/myapp/themes/" ) )}.
+	 * <p>
+	 * If using Java modules, it is not necessary to open the package in {@code module-info.java}.
 	 *
 	 * @param packageUrl a package URL
 	 * @since 2
@@ -1026,6 +1152,92 @@ public abstract class FlatLaf
 		FlatLaf.systemColorGetter = systemColorGetter;
 	}
 
+	/**
+	 * Returns UI key prefix, used in FlatLaf properties files, for light or dark themes.
+	 * Return value is either {@code [light]} or {@code [dark]}.
+	 *
+	 * @since 3.6
+	 */
+	public static String getUIKeyLightOrDarkPrefix( boolean dark ) {
+		return dark ? "[dark]" : "[light]";
+	}
+
+	/**
+	 * Returns set of UI key prefixes, used in FlatLaf properties files, for current platform.
+	 * If UI keys in properties files start with a prefix (e.g. {@code [someprefix]Button.background}),
+	 * then they are only used if that prefix is contained in this set
+	 * (or is one of {@code [light]} or {@code [dark]} depending on current theme).
+	 * <p>
+	 * By default, the set contains one or more of following prefixes:
+	 * <ul>
+	 *   <li>{@code [win]} on Windows
+	 *   <li>{@code [mac]} on macOS
+	 *   <li>{@code [linux]} on Linux
+	 *   <li>{@code [unknown]} on other platforms
+	 *   <li>{@code [gnome]} on Linux with GNOME desktop environment
+	 *   <li>{@code [kde]} on Linux with KDE desktop environment
+	 *   <li>on Linux, the value of the environment variable {@code XDG_CURRENT_DESKTOP},
+	 *       split at colons and converted to lower case (e.g. if value of  {@code XDG_CURRENT_DESKTOP}
+	 *       is {@code ubuntu:GNOME}, then {@code [ubuntu]} and {@code [gnome]})
+	 * </ul>
+	 * <p>
+	 * You can add own prefixes to the set.
+	 * The prefixes must start with '[' and end with ']' characters, otherwise they will be ignored.
+	 *
+	 * @since 3.6
+	 */
+	public static Set<String> getUIKeyPlatformPrefixes() {
+		if( uiKeyPlatformPrefixes == null ) {
+			uiKeyPlatformPrefixes = new HashSet<>();
+			uiKeyPlatformPrefixes.add(
+				SystemInfo.isWindows ? "[win]" :
+				SystemInfo.isMacOS ? "[mac]" :
+				SystemInfo.isLinux ? "[linux]" : "[unknown]" );
+
+			// Linux
+			if( SystemInfo.isLinux ) {
+				if( SystemInfo.isGNOME )
+					uiKeyPlatformPrefixes.add( "[gnome]" );
+				else if( SystemInfo.isKDE )
+					uiKeyPlatformPrefixes.add( "[kde]" );
+
+				// add values from XDG_CURRENT_DESKTOP for other desktops
+				String desktop = System.getenv( "XDG_CURRENT_DESKTOP" );
+				if( desktop != null ) {
+					// XDG_CURRENT_DESKTOP is a colon-separated list of strings
+					// https://specifications.freedesktop.org/desktop-entry-spec/latest/recognized-keys.html#key-onlyshowin
+					// e.g. "ubuntu:GNOME" on Ubuntu 24.10 or "GNOME-Classic:GNOME" on CentOS 7
+					for( String desk : StringUtils.split( desktop.toLowerCase( Locale.ENGLISH ), ':', true, true ) )
+						uiKeyPlatformPrefixes.add( '[' + desk + ']' );
+				}
+			}
+		}
+		return uiKeyPlatformPrefixes;
+	}
+
+	/**
+	 * Returns set of special UI key prefixes, used in FlatLaf properties files.
+	 * Unlike other prefixes, properties with special prefixes are preserved.
+	 * You can access them using `UIManager`. E.g. `UIManager.get( "[someSpecialPrefix]someKey" )`.
+	 * <p>
+	 * By default, the set contains following special prefixes:
+	 * <ul>
+	 *   <li>{@code [style]}
+	 * </ul>
+	 * <p>
+	 * You can add own prefixes to the set.
+	 * The prefixes must start with '[' and end with ']' characters, otherwise they will be ignored.
+	 *
+	 * @since 3.6
+	 */
+	public static Set<String> getUIKeySpecialPrefixes() {
+		if( uiKeySpecialPrefixes == null ) {
+			uiKeySpecialPrefixes = new HashSet<>();
+			uiKeySpecialPrefixes.add( "[style]" );
+		}
+		return uiKeySpecialPrefixes;
+	}
+
 	private static void reSetLookAndFeel() {
 		EventQueue.invokeLater( () -> {
 			LookAndFeel lookAndFeel = UIManager.getLookAndFeel();
@@ -1291,8 +1503,8 @@ public abstract class FlatLaf
 	 * @since 2.5
 	 */
 	public static Map<String, Class<?>> getStyleableInfos( JComponent c ) {
-		StyleableUI ui = getStyleableUI( c );
-		return (ui != null) ? ui.getStyleableInfos( c ) : null;
+		ComponentUI ui = JavaCompatibility2.getUI( c );
+		return (ui instanceof StyleableUI) ? ((StyleableUI)ui).getStyleableInfos( c ) : null;
 	}
 
 	/**
@@ -1304,41 +1516,10 @@ public abstract class FlatLaf
 	 */
 	@SuppressWarnings( "unchecked" )
 	public static <T> T getStyleableValue( JComponent c, String key ) {
-		StyleableUI ui = getStyleableUI( c );
-		return (ui != null) ? (T) ui.getStyleableValue( c, key ) : null;
+		ComponentUI ui = JavaCompatibility2.getUI( c );
+		return (ui instanceof StyleableUI) ? (T) ((StyleableUI)ui).getStyleableValue( c, key ) : null;
 	}
 
-	private static StyleableUI getStyleableUI( JComponent c ) {
-		if( !getUIMethodInitialized ) {
-			getUIMethodInitialized = true;
-
-			if( SystemInfo.isJava_9_orLater ) {
-				try {
-					// JComponent.getUI() is available since Java 9
-					getUIMethod = MethodHandles.lookup().findVirtual( JComponent.class, "getUI",
-						MethodType.methodType( ComponentUI.class ) );
-				} catch( Exception ex ) {
-					// ignore
-				}
-			}
-		}
-
-		try {
-			Object ui;
-			if( getUIMethod != null )
-				ui = getUIMethod.invoke( c );
-			else
-				ui = c.getClass().getMethod( "getUI" ).invoke( c );
-			return (ui instanceof StyleableUI) ? (StyleableUI) ui : null;
-		} catch( Throwable ex ) {
-			// ignore
-			return null;
-		}
-	}
-
-	private static boolean getUIMethodInitialized;
-	private static MethodHandle getUIMethod;
-
 	/**
 	 * Returns the preferred font family to be used for (nearly) all fonts; or {@code null}.
 	 *
@@ -1428,26 +1609,36 @@ public abstract class FlatLaf
 	private class FlatUIDefaults
 		extends UIDefaults
 	{
+		private UIDefaults metalDefaults;
+
 		FlatUIDefaults( int initialCapacity, float loadFactor ) {
 			super( initialCapacity, loadFactor );
 		}
 
 		@Override
 		public Object get( Object key ) {
-			Object value = getValue( key );
-			return (value != null) ? (value != NULL_VALUE ? value : null) : super.get( key );
+			return get( key, null );
 		}
 
 		@Override
 		public Object get( Object key, Locale l ) {
-			Object value = getValue( key );
-			return (value != null) ? (value != NULL_VALUE ? value : null) : super.get( key, l );
+			Object value = getFromUIDefaultsGetters( key );
+			if( value != null )
+				return (value != NULL_VALUE) ? value : null;
+
+			value = super.get( key, l );
+			if( value != null )
+				return value;
+
+			// get file chooser texts from Metal
+			return (key instanceof String && ((String)key).startsWith( "FileChooser." ))
+				? getFromMetal( (String) key, l )
+				: null;
 		}
 
-		private Object getValue( Object key ) {
+		private Object getFromUIDefaultsGetters( Object key ) {
 			// use local variable for getters to avoid potential multi-threading issues
 			List<Function<Object, Object>> uiDefaultsGetters = FlatLaf.this.uiDefaultsGetters;
-
 			if( uiDefaultsGetters == null )
 				return null;
 
@@ -1459,6 +1650,22 @@ public abstract class FlatLaf
 
 			return null;
 		}
+
+		private synchronized Object getFromMetal( String key, Locale l ) {
+			if( metalDefaults == null ) {
+				metalDefaults = new MetalLookAndFeel() {
+					// avoid unnecessary initialization
+					@Override protected void initClassDefaults( UIDefaults table ) {}
+					@Override protected void initSystemColorDefaults( UIDefaults table ) {}
+				}.getDefaults();
+
+				// empty not needed defaults (to save memory) because we're only interested
+				// in resource bundle strings, which are stored in another internal map
+				metalDefaults.clear();
+			}
+
+			return metalDefaults.get( key, l );
+		}
 	}
 
 	//---- class ActiveFont ---------------------------------------------------
@@ -1541,7 +1748,7 @@ public abstract class FlatLaf
 			int newStyle = (style != -1)
 				? style
 				: (styleChange != 0)
-					? baseStyle & ~((styleChange >> 16) & 0xffff) | (styleChange & 0xffff)
+					? (baseStyle & ~((styleChange >> 16) & 0xffff)) | (styleChange & 0xffff)
 					: baseStyle;
 
 			// new size
@@ -1588,7 +1795,7 @@ public abstract class FlatLaf
 				return toUIResource( baseFont );
 		}
 
-		private FontUIResource toUIResource( Font font ) {
+		private static FontUIResource toUIResource( Font font ) {
 			// make sure that font is a UIResource for LaF switching
 			return (font instanceof FontUIResource)
 				? (FontUIResource) font

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatPropertiesLaf.java

@@ -20,15 +20,21 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
+import java.util.Locale;
 import java.util.Properties;
+import com.formdev.flatlaf.themes.FlatMacDarkLaf;
+import com.formdev.flatlaf.themes.FlatMacLightLaf;
 
 /**
  * A Flat LaF that is able to load UI defaults from properties passed to the constructor.
  * <p>
  * Specify the base theme in the properties with {@code @baseTheme=<baseTheme>}.
  * Allowed values for {@code <baseTheme>} are {@code light} (the default), {@code dark},
- * {@code intellij} or {@code darcula}.
+ * {@code intellij}, {@code darcula}, {@code maclight} or {@code macdark}.
  * <p>
  * The properties are applied after loading the base theme and may overwrite base properties.
  * All features of FlatLaf properties files are available.
@@ -59,8 +65,8 @@ public class FlatPropertiesLaf
 		throws IOException
 	{
 		Properties properties = new Properties();
-		try( InputStream in2 = in ) {
-			properties.load( in2 );
+		try( Reader reader = new InputStreamReader( in, StandardCharsets.UTF_8 )) {
+			properties.load( reader );
 		}
 		return properties;
 	}
@@ -70,7 +76,8 @@ public class FlatPropertiesLaf
 		this.properties = properties;
 
 		baseTheme = properties.getProperty( "@baseTheme", "light" );
-		dark = "dark".equalsIgnoreCase( baseTheme ) || "darcula".equalsIgnoreCase( baseTheme );
+		dark = "dark".equalsIgnoreCase( baseTheme ) || "darcula".equalsIgnoreCase( baseTheme ) ||
+			"macdark".equalsIgnoreCase( baseTheme );
 	}
 
 	@Override
@@ -96,7 +103,7 @@ public class FlatPropertiesLaf
 	protected ArrayList<Class<?>> getLafClassesForDefaultsLoading() {
 		ArrayList<Class<?>> lafClasses = new ArrayList<>();
 		lafClasses.add( FlatLaf.class );
-		switch( baseTheme.toLowerCase() ) {
+		switch( baseTheme.toLowerCase( Locale.ENGLISH ) ) {
 			default:
 			case "light":
 				lafClasses.add( FlatLightLaf.class );
@@ -115,6 +122,16 @@ public class FlatPropertiesLaf
 				lafClasses.add( FlatDarkLaf.class );
 				lafClasses.add( FlatDarculaLaf.class );
 				break;
+
+			case "maclight":
+				lafClasses.add( FlatLightLaf.class );
+				lafClasses.add( FlatMacLightLaf.class );
+				break;
+
+			case "macdark":
+				lafClasses.add( FlatDarkLaf.class );
+				lafClasses.add( FlatMacDarkLaf.class );
+				break;
 		}
 		return lafClasses;
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatSystemProperties.java

@@ -16,7 +16,10 @@
 
 package com.formdev.flatlaf;
 
+import javax.swing.JFileChooser;
+import javax.swing.JPopupMenu;
 import javax.swing.SwingUtilities;
+import com.formdev.flatlaf.util.SystemFileChooser;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -82,7 +85,7 @@ public interface FlatSystemProperties
 	 * {@link FlatClientProperties#USE_WINDOW_DECORATIONS} and
 	 * UI default {@code TitlePane.useWindowDecorations}.
 	 * <p>
-	 * (requires Window 10/11)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> none
@@ -99,11 +102,14 @@ public interface FlatSystemProperties
 	 * Setting this to {@code false} disables using JetBrains Runtime custom window decorations.
 	 * Then FlatLaf native window decorations are used.
 	 * <p>
-	 * (requires Window 10/11)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> {@code false} (since v2; was {@code true} in v1)
+	 *
+	 * @deprecated No longer used since FlatLaf 3.3. Retained for API compatibility.
 	 */
+	@Deprecated
 	String USE_JETBRAINS_CUSTOM_DECORATIONS = "flatlaf.useJetBrainsCustomDecorations";
 
 	/**
@@ -117,7 +123,7 @@ public interface FlatSystemProperties
 	 * {@link FlatClientProperties#MENU_BAR_EMBEDDED} and
 	 * UI default {@code TitlePane.menuBarEmbedded}.
 	 * <p>
-	 * (requires Window 10/11)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> none
@@ -132,6 +138,37 @@ public interface FlatSystemProperties
 	 */
 	String ANIMATION = "flatlaf.animation";
 
+	/**
+	 * Specifies whether native rounded popup borders should be used (if supported by operating system).
+	 * <p>
+	 * (requires Windows 11 or macOS)
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}; except in FlatLaf 3.5.x on macOS 14.4+ where it was {@code false}
+	 *
+	 * @since 3.5.2
+	 */
+	String USE_ROUNDED_POPUP_BORDER = "flatlaf.useRoundedPopupBorder";
+
+	/**
+	 * Species whether popup windows may be reused without (temporary) hiding them.
+	 * E.g. if "moving" a tooltip to follow the mouse pointer, normally it is necessary
+	 * to hide the tooltip and show it again at the new location, which causes some
+	 * flicker with heavy-weight popup windows that FlatLaf uses on all platforms.
+	 * <p>
+	 * If {@code true}, hiding popup window is deferred for an event cycle,
+	 * which allows reusing still visible popup window and avoids flicker when "moving" the popup.
+	 * <p>
+	 * Note that {@link JPopupMenu} popup windows (menus and combobox lists) are newer reused.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 *
+	 * @since 3.6.2
+	 */
+	String REUSE_VISIBLE_POPUP_WINDOW = "flatlaf.reuseVisiblePopupWindow";
+
+
 	/**
 	 * Specifies whether vertical text position is corrected when UI is scaled on HiDPI screens.
 	 * <p>
@@ -150,29 +187,78 @@ public interface FlatSystemProperties
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> {@code true}
+	 *
 	 * @since 2.5
 	 */
 	String UPDATE_UI_ON_SYSTEM_FONT_CHANGE = "flatlaf.updateUIOnSystemFontChange";
 
 	/**
-	 * Specifies a directory in which the native FlatLaf libraries have been extracted.
+	 * Specifies whether FlatLaf native library should be used.
+	 * <p>
+	 * Setting this to {@code false} disables loading native library,
+	 * which also disables some features that depend on the native library.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 *
+	 * @since 3.2
+	 */
+	String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary";
+
+	/**
+	 * Specifies a directory in which the FlatLaf native libraries are searched for.
 	 * The path can be absolute or relative to current application working directory.
 	 * This can be used to avoid extraction of the native libraries to the temporary directory at runtime.
 	 * <p>
-	 * If the value is {@code "system"}, then {@link System#loadLibrary(String)} is
-	 * used to load the native library.
-	 * Searches for the native library in classloader of caller
+	 * If the value is {@code "system"} (supported since FlatLaf 2.6),
+	 * then {@link System#loadLibrary(String)} is used to load the native library.
+	 * This searches for the native library in classloader of caller
 	 * (using {@link ClassLoader#findLibrary(String)}) and in paths specified
 	 * in system properties {@code sun.boot.library.path} and {@code java.library.path}.
-	 * (supported since FlatLaf 2.6)
 	 * <p>
-	 * If the native library can not loaded from the given path (or via {@link System#loadLibrary(String)}),
+	 * If the native library can not be loaded from the given path (or via {@link System#loadLibrary(String)}),
 	 * then the embedded native library is extracted to the temporary directory and loaded from there.
+	 * <p>
+	 * The file names of the native libraries must be either:
+	 * <ul>
+	 *   <li>the same as in flatlaf.jar in package 'com/formdev/flatlaf/natives' (required for "system") or
+	 *   <li>when downloaded from Maven central then as described here:
+	 *     <a href="https://www.formdev.com/flatlaf/native-libraries/">https://www.formdev.com/flatlaf/native-libraries/</a>
+	 *     (requires FlatLaf 3.4)
+	 * </ul>
+	 * <p>
+	 * <strong>Note</strong>: Since FlatLaf 3.1 it is recommended to download the
+	 * FlatLaf native libraries from Maven central and distribute them with your
+	 * application in the same directory as flatlaf.jar.
+	 * Then it is <strong>not necessary</strong> to set this system property.
+	 * See <a href="https://www.formdev.com/flatlaf/native-libraries/">https://www.formdev.com/flatlaf/native-libraries/</a>
+	 * for details.
 	 *
 	 * @since 2
 	 */
 	String NATIVE_LIBRARY_PATH = "flatlaf.nativeLibraryPath";
 
+	/**
+	 * Specifies whether safe triangle is used to improve usability of submenus.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 *
+	 * @since 3.5.1
+	 */
+	String USE_SUB_MENU_SAFE_TRIANGLE = "flatlaf.useSubMenuSafeTriangle";
+
+	/**
+	 * Specifies whether {@link SystemFileChooser} uses operating system file dialogs.
+	 * If set to {@code false}, the {@link JFileChooser} is used instead.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 *
+	 * @since 3.7
+	 */
+	String USE_SYSTEM_FILE_CHOOSER = "flatlaf.useSystemFileChooser";
+
 	/**
 	 * Checks whether a system property is set and returns {@code true} if its value
 	 * is {@code "true"} (case-insensitive), otherwise it returns {@code false}.

flatlaf-core/src/main/java/com/formdev/flatlaf/IntelliJTheme.java

@@ -16,25 +16,24 @@
 
 package com.formdev.flatlaf;
 
-import java.awt.Color;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
-import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Properties;
 import java.util.Set;
-import javax.swing.UIDefaults;
-import javax.swing.plaf.ColorUIResource;
 import com.formdev.flatlaf.json.Json;
 import com.formdev.flatlaf.json.ParseException;
-import com.formdev.flatlaf.util.ColorFunctions;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.StringUtils;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -59,13 +58,11 @@ public class IntelliJTheme
 	public final boolean dark;
 	public final String author;
 
-	private final boolean isMaterialUILite;
+	private Map<String, String> jsonColors;
+	private Map<String, Object> jsonUI;
+	private Map<String, Object> jsonIcons;
 
-	private final Map<String, String> colors;
-	private final Map<String, Object> ui;
-	private final Map<String, Object> icons;
-
-	private Map<String, ColorUIResource> namedColors = Collections.emptyMap();
+	private Map<String, String> namedColors = Collections.emptyMap();
 
 	/**
 	 * Loads a IntelliJ .theme.json file from the given input stream,
@@ -80,7 +77,7 @@ public class IntelliJTheme
 		try {
 		    return FlatLaf.setup( createLaf( in ) );
 		} catch( Exception ex ) {
-			LoggingFacade.INSTANCE.logSevere(  "FlatLaf: Failed to load IntelliJ theme", ex );
+			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to load IntelliJ theme", ex );
 		    return false;
 		}
 	}
@@ -134,179 +131,252 @@ public class IntelliJTheme
 	    dark = Boolean.parseBoolean( (String) json.get( "dark" ) );
 	    author = (String) json.get( "author" );
 
-		isMaterialUILite = author.equals( "Mallowigi" );
-
-	    colors = (Map<String, String>) json.get( "colors" );
-	    ui = (Map<String, Object>) json.get( "ui" );
-	    icons = (Map<String, Object>) json.get( "icons" );
+	    jsonColors = (Map<String, String>) json.get( "colors" );
+	    jsonUI = (Map<String, Object>) json.get( "ui" );
+	    jsonIcons = (Map<String, Object>) json.get( "icons" );
 	}
 
-	private void applyProperties( UIDefaults defaults ) {
-		if( ui == null )
+	private void applyProperties( Properties properties ) {
+		if( jsonUI == null )
 			return;
 
-		defaults.put( "Component.isIntelliJTheme", true );
+		put( properties, "Component.isIntelliJTheme", "true" );
 
 		// enable button shadows
-		defaults.put( "Button.paintShadow", true );
-		defaults.put( "Button.shadowWidth", dark ? 2 : 1 );
+		put( properties, "Button.paintShadow", "true" );
+		put( properties, "Button.shadowWidth", dark ? "2" : "1" );
 
-		Map<Object, Object> themeSpecificDefaults = removeThemeSpecificDefaults( defaults );
+		Map<String, String> themeSpecificProps = removeThemeSpecificProps( properties );
+		Set<String> jsonUIKeys = new HashSet<>();
 
-		loadNamedColors( defaults );
+		// Json node "colors"
+		loadNamedColors( properties, jsonUIKeys );
 
-		// convert Json "ui" structure to UI defaults
-		ArrayList<Object> defaultsKeysCache = new ArrayList<>();
-		Set<String> uiKeys = new HashSet<>();
-		for( Map.Entry<String, Object> e : ui.entrySet() )
-			apply( e.getKey(), e.getValue(), defaults, defaultsKeysCache, uiKeys );
+		// convert Json "ui" structure to UI properties
+		for( Map.Entry<String, Object> e : jsonUI.entrySet() )
+			apply( e.getKey(), e.getValue(), properties, jsonUIKeys );
 
-		applyColorPalette( defaults );
-		applyCheckBoxColors( defaults );
+		// set FlatLaf variables
+		copyIfSetInJson( properties, jsonUIKeys, "@background", "Panel.background", "*.background" );
+		copyIfSetInJson( properties, jsonUIKeys, "@foreground", "CheckBox.foreground", "*.foreground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@accentBaseColor",
+			"ColorPalette.accent", // Material UI Lite, Hiberbee
+			"ColorPalette.accentColor", // Dracula, One Dark
+			"ProgressBar.foreground",
+			"*.selectionBackground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@accentUnderlineColor", "*.underlineColor", "TabbedPane.underlineColor" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionBackground", "*.selectionBackground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionForeground", "*.selectionForeground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionInactiveBackground", "*.selectionInactiveBackground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionInactiveForeground", "*.selectionInactiveForeground" );
+
+		// Json node "icons/ColorPalette"
+		applyIconsColorPalette( properties );
+
+		// apply "CheckBox.icon." colors
+		applyCheckBoxColors( properties );
 
 		// copy values
 		for( Map.Entry<String, String> e : uiKeyCopying.entrySet() ) {
-			Object value = defaults.get( e.getValue() );
+			Object value = properties.get( e.getValue() );
 			if( value != null )
-				defaults.put( e.getKey(), value );
+				put( properties, e.getKey(), value );
 		}
 
 		// IDEA does not paint button background if disabled, but FlatLaf does
-		Object panelBackground = defaults.get( "Panel.background" );
-		defaults.put( "Button.disabledBackground", panelBackground );
-		defaults.put( "ToggleButton.disabledBackground", panelBackground );
+		put( properties, "Button.disabledBackground", "@disabledBackground" );
+		put( properties, "ToggleButton.disabledBackground", "@disabledBackground" );
 
-		// fix Button borders
-		copyIfNotSet( defaults, "Button.focusedBorderColor", "Component.focusedBorderColor", uiKeys );
-		defaults.put( "Button.hoverBorderColor", defaults.get( "Button.focusedBorderColor" ) );
-		defaults.put( "HelpButton.hoverBorderColor", defaults.get( "Button.focusedBorderColor" ) );
-
-		// IDEA uses an SVG icon for the help button, but paints the background with Button.startBackground and Button.endBackground
-		Object helpButtonBackground = defaults.get( "Button.startBackground" );
-		Object helpButtonBorderColor = defaults.get( "Button.startBorderColor" );
-		if( helpButtonBackground == null )
-			helpButtonBackground = defaults.get( "Button.background" );
-		if( helpButtonBorderColor == null )
-			helpButtonBorderColor = defaults.get( "Button.borderColor" );
-		defaults.put( "HelpButton.background", helpButtonBackground );
-		defaults.put( "HelpButton.borderColor", helpButtonBorderColor );
-		defaults.put( "HelpButton.disabledBackground", panelBackground );
-		defaults.put( "HelpButton.disabledBorderColor", defaults.get( "Button.disabledBorderColor" ) );
-		defaults.put( "HelpButton.focusedBorderColor", defaults.get( "Button.focusedBorderColor" ) );
-		defaults.put( "HelpButton.focusedBackground", defaults.get( "Button.focusedBackground" ) );
+		// fix Button
+		fixStartEnd( properties, jsonUIKeys, "Button.startBackground", "Button.endBackground", "Button.background" );
+		fixStartEnd( properties, jsonUIKeys, "Button.startBorderColor", "Button.endBorderColor", "Button.borderColor" );
+		fixStartEnd( properties, jsonUIKeys, "Button.default.startBackground", "Button.default.endBackground", "Button.default.background" );
+		fixStartEnd( properties, jsonUIKeys, "Button.default.startBorderColor", "Button.default.endBorderColor", "Button.default.borderColor" );
 
 		// IDEA uses TextField.background for editable ComboBox and Spinner
-		defaults.put( "ComboBox.editableBackground", defaults.get( "TextField.background" ) );
-		defaults.put( "Spinner.background", defaults.get( "TextField.background" ) );
-
-		// Spinner arrow button always has same colors as ComboBox arrow button
-		defaults.put( "Spinner.buttonBackground", defaults.get( "ComboBox.buttonEditableBackground" ) );
-		defaults.put( "Spinner.buttonArrowColor", defaults.get( "ComboBox.buttonArrowColor" ) );
-		defaults.put( "Spinner.buttonDisabledArrowColor", defaults.get( "ComboBox.buttonDisabledArrowColor" ) );
+		Object textFieldBackground = get( properties, themeSpecificProps, "TextField.background" );
+		put( properties, "ComboBox.editableBackground", textFieldBackground );
+		put( properties, "Spinner.background", textFieldBackground );
 
 		// some themes specify colors for TextField.background, but forget to specify it for other components
-		// (probably because those components are not used in IntelliJ)
-		if( uiKeys.contains( "TextField.background" ) ) {
-			Object textFieldBackground = defaults.get( "TextField.background" );
-			if( !uiKeys.contains( "FormattedTextField.background" ) )
-				defaults.put( "FormattedTextField.background", textFieldBackground );
-			if( !uiKeys.contains( "PasswordField.background" ) )
-				defaults.put( "PasswordField.background", textFieldBackground );
-			if( !uiKeys.contains( "EditorPane.background" ) )
-				defaults.put( "EditorPane.background", textFieldBackground );
-			if( !uiKeys.contains( "TextArea.background" ) )
-				defaults.put( "TextArea.background", textFieldBackground );
-			if( !uiKeys.contains( "TextPane.background" ) )
-				defaults.put( "TextPane.background", textFieldBackground );
-			if( !uiKeys.contains( "Spinner.background" ) )
-				defaults.put( "Spinner.background", textFieldBackground );
-		}
+		// (probably because those components are not used in IntelliJ IDEA)
+		putAll( properties, textFieldBackground,
+			"EditorPane.background",
+			"FormattedTextField.background",
+			"PasswordField.background",
+			"TextArea.background",
+			"TextPane.background"
+		);
+		putAll( properties, get( properties, themeSpecificProps, "TextField.selectionBackground" ),
+			"EditorPane.selectionBackground",
+			"FormattedTextField.selectionBackground",
+			"PasswordField.selectionBackground",
+			"TextArea.selectionBackground",
+			"TextPane.selectionBackground"
+		);
+		putAll( properties, get( properties, themeSpecificProps, "TextField.selectionForeground" ),
+			"EditorPane.selectionForeground",
+			"FormattedTextField.selectionForeground",
+			"PasswordField.selectionForeground",
+			"TextArea.selectionForeground",
+			"TextPane.selectionForeground"
+		);
 
-		// fix ToggleButton
-		if( !uiKeys.contains( "ToggleButton.startBackground" ) && !uiKeys.contains( "*.startBackground" ) )
-			defaults.put( "ToggleButton.startBackground", defaults.get( "Button.startBackground" ) );
-		if( !uiKeys.contains( "ToggleButton.endBackground" ) && !uiKeys.contains( "*.endBackground" ) )
-			defaults.put( "ToggleButton.endBackground", defaults.get( "Button.endBackground" ) );
-		if( !uiKeys.contains( "ToggleButton.foreground" ) && uiKeys.contains( "Button.foreground" ) )
-			defaults.put( "ToggleButton.foreground", defaults.get( "Button.foreground" ) );
+		// fix disabled and not-editable backgrounds for text components, combobox and spinner
+		// (IntelliJ IDEA does not use those colors; instead it used background color of parent)
+		putAll( properties, "@disabledBackground",
+			"ComboBox.disabledBackground",
+			"EditorPane.disabledBackground", "EditorPane.inactiveBackground",
+			"FormattedTextField.disabledBackground", "FormattedTextField.inactiveBackground",
+			"PasswordField.disabledBackground", "PasswordField.inactiveBackground",
+			"Spinner.disabledBackground",
+			"TextArea.disabledBackground", "TextArea.inactiveBackground",
+			"TextField.disabledBackground", "TextField.inactiveBackground",
+			"TextPane.disabledBackground", "TextPane.inactiveBackground"
+		);
 
 		// fix DesktopPane background (use Panel.background and make it 5% darker/lighter)
-		Color desktopBackgroundBase = defaults.getColor( "Panel.background" );
-		Color desktopBackground = ColorFunctions.applyFunctions( desktopBackgroundBase,
-			new ColorFunctions.HSLIncreaseDecrease( 2, dark, 5, false, true ) );
-		defaults.put( "Desktop.background", new ColorUIResource( desktopBackground ) );
-
-		// fix List and Table background colors in Material UI Lite themes
-		if( isMaterialUILite ) {
-			defaults.put( "List.background", defaults.get( "Tree.background" ) );
-			defaults.put( "Table.background", defaults.get( "Tree.background" ) );
-		}
+		put( properties, "Desktop.background", dark ? "lighten($Panel.background,5%)" : "darken($Panel.background,5%)" );
 
 		// limit tree row height
-		int rowHeight = defaults.getInt( "Tree.rowHeight" );
+		String rowHeightStr = (String) properties.get( "Tree.rowHeight" );
+		int rowHeight = (rowHeightStr != null) ? Integer.parseInt( rowHeightStr ) : 0;
 		if( rowHeight > 22 )
-			defaults.put( "Tree.rowHeight", 22 );
+			put( properties, "Tree.rowHeight", "22" );
 
-		// apply theme specific UI defaults at the end to allow overwriting
-		for( Map.Entry<Object, Object> e : themeSpecificDefaults.entrySet() ) {
-			Object key = e.getKey();
-			Object value = e.getValue();
+		// get (and remove) theme specific wildcard replacements, which override all other properties that end with same suffix
+		HashMap<String, String> wildcardProps = new HashMap<>();
+		Iterator<Map.Entry<String, String>> it = themeSpecificProps.entrySet().iterator();
+		while( it.hasNext() ) {
+			Map.Entry<String, String> e = it.next();
+			String key = e.getKey();
+			if( key.startsWith( "*." ) ) {
+				wildcardProps.put( key, e.getValue() );
+				it.remove();
+			}
+		}
+
+		// override properties with theme specific wildcard replacements
+		if( !wildcardProps.isEmpty() ) {
+			for( Map.Entry<String, String> e : wildcardProps.entrySet() )
+				applyWildcard( properties, e.getKey(), e.getValue() );
+		}
+
+		// apply theme specific properties at the end to allow overwriting
+		for( Map.Entry<String, String> e : themeSpecificProps.entrySet() ) {
+			String key = e.getKey();
+			String value = e.getValue();
 
 			// append styles to existing styles
-			if( key instanceof String && ((String)key).startsWith( "[style]" ) ) {
-				Object oldValue = defaults.get( key );
+			if( key.startsWith( "[style]" ) ) {
+				String oldValue = (String) properties.get( key );
 				if( oldValue != null )
 					value = oldValue + "; " + value;
 			}
 
-			defaults.put( key, value );
+			put( properties, key, value );
+		}
+
+		// let Java release memory
+		jsonColors = null;
+		jsonUI = null;
+		jsonIcons = null;
+	}
+
+	private String get( Properties properties, Map<String, String> themeSpecificProps, String key ) {
+		return themeSpecificProps.getOrDefault( key, (String) properties.get( key ) );
+	}
+
+	private void put( Properties properties, Object key, Object value ) {
+		if( value != null )
+			properties.put( key, value );
+		else
+			properties.remove( key );
+	}
+
+	private void putAll( Properties properties, Object value, String... keys ) {
+		for( String key : keys )
+			put( properties, key, value );
+	}
+
+	private void copyIfSetInJson( Properties properties, Set<String> jsonUIKeys, String destKey, String... srcKeys ) {
+		for( String srcKey : srcKeys ) {
+			if( jsonUIKeys.contains( srcKey ) ) {
+				Object value = properties.get( srcKey );
+				if( value != null ) {
+					put( properties, destKey, value );
+					break;
+				}
+			}
 		}
 	}
 
-	private Map<Object, Object> removeThemeSpecificDefaults( UIDefaults defaults ) {
-		// search for theme specific UI defaults keys
+	private void fixStartEnd( Properties properties, Set<String> jsonUIKeys, String startKey, String endKey, String key ) {
+		if( jsonUIKeys.contains( startKey ) && jsonUIKeys.contains( endKey ) )
+			put( properties, key, "$" + startKey );
+	}
+
+	private Map<String, String> removeThemeSpecificProps( Properties properties ) {
+		// search for theme specific properties keys
 		ArrayList<String> themeSpecificKeys = new ArrayList<>();
-		for( Object key : defaults.keySet() ) {
-			if( key instanceof String && ((String)key).startsWith( "[" ) && !((String)key).startsWith( "[style]" ) )
+		for( Object key : properties.keySet() ) {
+			if( ((String)key).startsWith( "{" ) )
 				themeSpecificKeys.add( (String) key );
 		}
 
-		// remove theme specific UI defaults and remember only those for current theme
-		Map<Object, Object> themeSpecificDefaults = new HashMap<>();
-		String currentThemePrefix = '[' + name.replace( ' ', '_' ) + ']';
-		String currentThemeAndAuthorPrefix = '[' + name.replace( ' ', '_' ) + "---" + author.replace( ' ', '_' ) + ']';
-		String currentAuthorPrefix = "[author-" + author.replace( ' ', '_' ) + ']';
-		String allThemesPrefix = "[*]";
-		String[] prefixes = { currentThemePrefix, currentThemeAndAuthorPrefix, currentAuthorPrefix, allThemesPrefix };
+		// special prefixes (priority from highest to lowest)
+		String currentThemePrefix = '{' + name.replace( ' ', '_' ) + '}';
+		String currentThemeAndAuthorPrefix = '{' + name.replace( ' ', '_' ) + "---" + author.replace( ' ', '_' ) + '}';
+		String currentAuthorPrefix = "{author-" + author.replace( ' ', '_' ) + '}';
+		String lightOrDarkPrefix = dark ? "{*-dark}" : "{*-light}";
+		String allThemesPrefix = "{*}";
+		String[] prefixes = { currentThemePrefix, currentThemeAndAuthorPrefix, currentAuthorPrefix, lightOrDarkPrefix, allThemesPrefix };
+
+		// collect values for special prefixes in its own maps
+		@SuppressWarnings( "unchecked" )
+		Map<String, String>[] maps = new Map[prefixes.length];
+		for( int i = 0; i < maps.length; i++ )
+			maps[i] = new HashMap<>();
+
+		// remove theme specific properties and remember only those for current theme
 		for( String key : themeSpecificKeys ) {
-			Object value = defaults.remove( key );
-			for( String prefix : prefixes ) {
+			String value = (String) properties.remove( key );
+			for( int i = 0; i < prefixes.length; i++ ) {
+				String prefix = prefixes[i];
 				if( key.startsWith( prefix ) ) {
-					themeSpecificDefaults.put( key.substring( prefix.length() ), value );
+					maps[i].put( key.substring( prefix.length() ), value );
 					break;
 				}
 			}
 		}
 
-		return themeSpecificDefaults;
+		// copy values into single map (from lowest to highest priority)
+		Map<String, String> themeSpecificProps = new HashMap<>();
+		for( int i = maps.length - 1; i >= 0; i-- )
+			themeSpecificProps.putAll( maps[i] );
+		return themeSpecificProps;
 	}
 
 	/**
 	 * http://www.jetbrains.org/intellij/sdk/docs/reference_guide/ui_themes/themes_customize.html#defining-named-colors
 	 */
-	private void loadNamedColors( UIDefaults defaults ) {
-		if( colors == null )
+	private void loadNamedColors( Properties properties, Set<String> jsonUIKeys ) {
+		if( jsonColors == null )
 			return;
 
 		namedColors = new HashMap<>();
 
-		for( Map.Entry<String, String> e : colors.entrySet() ) {
+		for( Map.Entry<String, String> e : jsonColors.entrySet() ) {
 			String value = e.getValue();
-			ColorUIResource color = parseColor( value );
-			if( color != null ) {
+			if( canParseColor( value ) ) {
 				String key = e.getKey();
-				namedColors.put( key, color );
-				defaults.put( "ColorPalette." + key, color );
+				namedColors.put( key, value );
+
+				String uiKey = "ColorPalette." + key;
+				put( properties, uiKey, value );
+
+				// this is only necessary for copyIfSetInJson() (used for accent color)
+				jsonUIKeys.add( uiKey );
 			}
 		}
 	}
@@ -315,7 +385,7 @@ public class IntelliJTheme
 	 * http://www.jetbrains.org/intellij/sdk/docs/reference_guide/ui_themes/themes_customize.html#custom-ui-control-colors
 	 */
 	@SuppressWarnings( "unchecked" )
-	private void apply( String key, Object value, UIDefaults defaults, ArrayList<Object> defaultsKeysCache, Set<String> uiKeys ) {
+	private void apply( String key, Object value, Properties properties, Set<String> jsonUIKeys ) {
 		if( value instanceof Map ) {
 			Map<String, Object> map = (Map<String, Object>)value;
 			if( map.containsKey( "os.default" ) || map.containsKey( "os.windows" ) || map.containsKey( "os.mac" ) || map.containsKey( "os.linux" ) ) {
@@ -323,19 +393,17 @@ public class IntelliJTheme
 					: SystemInfo.isMacOS ? "os.mac"
 					: SystemInfo.isLinux ? "os.linux" : null;
 				if( osKey != null && map.containsKey( osKey ) )
-					apply( key, map.get( osKey ), defaults, defaultsKeysCache, uiKeys );
+					apply( key, map.get( osKey ), properties, jsonUIKeys );
 				else if( map.containsKey( "os.default" ) )
-					apply( key, map.get( "os.default" ), defaults, defaultsKeysCache, uiKeys );
+					apply( key, map.get( "os.default" ), properties, jsonUIKeys );
 			} else {
 				for( Map.Entry<String, Object> e : map.entrySet() )
-					apply( key + '.' + e.getKey(), e.getValue(), defaults, defaultsKeysCache, uiKeys );
+					apply( key + '.' + e.getKey(), e.getValue(), properties, jsonUIKeys );
 			}
 		} else {
 			if( "".equals( value ) )
 				return; // ignore empty value
 
-			uiKeys.add( key );
-
 			// ignore some properties that affect sizes
 			if( key.endsWith( ".border" ) ||
 				key.endsWith( ".rowHeight" ) ||
@@ -345,15 +413,40 @@ public class IntelliJTheme
 				key.equals( "Tree.rightChildIndent" ) )
 			  return; // ignore
 
+			// ignore icons
+			if( key.endsWith( "Icon" ) )
+				return; // ignore
+
 			// map keys
 			key = uiKeyMapping.getOrDefault( key, key );
 			if( key.isEmpty() )
 				return; // ignore key
 
-			String valueStr = value.toString();
+			// exclude properties (1st level)
+			int dot = key.indexOf( '.' );
+			if( dot > 0 && uiKeyExcludesStartsWith.contains( key.substring( 0, dot + 1 ) ) )
+				return;
+
+			// exclude properties (2st level)
+			int dot2 = (dot > 0) ? key.indexOf( '.', dot + 1 ) : -1;
+			if( dot2 > 0 && uiKeyExcludesStartsWith.contains( key.substring( 0, dot2 + 1 ) ) )
+				return;
+
+			// exclude properties (contains)
+			for( String s : uiKeyExcludesContains ) {
+				if( key.contains( s ) )
+					return;
+			}
+
+			if( uiKeyDoNotOverride.contains( key ) && jsonUIKeys.contains( key ) )
+				return;
+
+			jsonUIKeys.add( key );
+
+			String valueStr = value.toString().trim();
 
 			// map named colors
-			Object uiValue = namedColors.get( valueStr );
+			String uiValue = namedColors.get( valueStr );
 
 			// parse value
 			if( uiValue == null ) {
@@ -372,46 +465,64 @@ public class IntelliJTheme
 
 				// parse value
 				try {
-					uiValue = UIDefaultsLoader.parseValue( key, valueStr, null );
+					UIDefaultsLoader.parseValue( key, valueStr, null );
+					uiValue = valueStr;
 				} catch( RuntimeException ex ) {
-					UIDefaultsLoader.logParseError( key, valueStr, ex, false );
+					UIDefaultsLoader.logParseError( key, valueStr, ex, true );
 					return; // ignore invalid value
 				}
 			}
 
-			if( key.startsWith( "*." ) ) {
-				// wildcard
-				String tail = key.substring( 1 );
+			// wildcards
+			if( applyWildcard( properties, key, uiValue ) )
+				return;
 
-				// because we can not iterate over the UI defaults keys while
-				// modifying UI defaults in the same loop, we have to copy the keys
-				if( defaultsKeysCache.size() != defaults.size() ) {
-					defaultsKeysCache.clear();
-					Enumeration<Object> e = defaults.keys();
-					while( e.hasMoreElements() )
-						defaultsKeysCache.add( e.nextElement() );
-				}
-
-				// replace all values in UI defaults that match the wildcard key
-				for( Object k : defaultsKeysCache ) {
-					if( k.equals( "Desktop.background" ) ||
-						k.equals( "DesktopIcon.background" ) )
-					  continue;
-
-					if( k instanceof String ) {
-						// support replacing of mapped keys
-						// (e.g. set ComboBox.buttonEditableBackground to *.background
-						// because it is mapped from ComboBox.ArrowButton.background)
-						String km = uiKeyInverseMapping.getOrDefault( k, (String) k );
-						if( km.endsWith( tail ) && !((String)k).startsWith( "CheckBox.icon." ) )
-							defaults.put( k, uiValue );
-					}
-				}
-			} else
-				defaults.put( key, uiValue );
+			put( properties, key, uiValue );
 		}
 	}
 
+	private boolean applyWildcard( Properties properties, String key, String value ) {
+		if( !key.startsWith( "*." ) )
+			return false;
+
+		String tail = key.substring( 1 );
+
+		// because we can not iterate over the properties keys while
+		// modifying properties in the same loop, we have to copy the keys
+		String[] keys = properties.keySet().toArray( new String[properties.size()] );
+
+		// replace all values in properties that match the wildcard key
+		for( String k : keys ) {
+			if( k.startsWith( "*" ) ||
+				k.startsWith( "@" ) ||
+				k.startsWith( "HelpButton." ) ||
+				k.startsWith( "JX" ) ||
+				k.startsWith( "Jide" ) ||
+				k.startsWith( "ProgressBar.selection" ) ||
+				k.startsWith( "TitlePane." ) ||
+				k.startsWith( "ToggleButton.tab." ) ||
+				k.equals( "Desktop.background" ) ||
+				k.equals( "DesktopIcon.background" ) ||
+				k.equals( "TabbedPane.focusColor" ) ||
+				k.endsWith( ".hoverBackground" ) ||
+				k.endsWith( ".pressedBackground" ) )
+			  continue;
+
+			// support replacing of mapped keys
+			// (e.g. set ComboBox.buttonEditableBackground to *.background
+			// because it is mapped from ComboBox.ArrowButton.background)
+			String km = uiKeyInverseMapping.getOrDefault( k, k );
+			if( km.endsWith( tail ) && !k.startsWith( "CheckBox.icon." ) )
+				put( properties, k, value );
+		}
+
+		// Note: also add wildcards to properties and let UIDefaultsLoader
+		//       process it on BasicLookAndFeel UI defaults
+		put( properties, key, value );
+
+		return true;
+	}
+
 	private String fixColorIfValid( String newColorStr, String colorStr ) {
 		try {
 			// check whether it is valid
@@ -423,11 +534,11 @@ public class IntelliJTheme
 		}
 	}
 
-	private void applyColorPalette( UIDefaults defaults ) {
-		if( icons == null )
+	private void applyIconsColorPalette( Properties properties ) {
+		if( jsonIcons == null )
 			return;
 
-		Object palette = icons.get( "ColorPalette" );
+		Object palette = jsonIcons.get( "ColorPalette" );
 		if( !(palette instanceof Map) )
 			return;
 
@@ -436,44 +547,48 @@ public class IntelliJTheme
 		for( Map.Entry<String, Object> e : colorPalette.entrySet() ) {
 			String key = e.getKey();
 			Object value = e.getValue();
-			if( key.startsWith( "Checkbox." ) || !(value instanceof String) )
+			if( key.startsWith( "Checkbox." ) || key.startsWith( "#" ) || !(value instanceof String) )
 				continue;
 
 			if( dark )
 				key = StringUtils.removeTrailing( key, ".Dark" );
 
-			ColorUIResource color = toColor( (String) value );
+			String color = toColor( (String) value );
 			if( color != null )
-				defaults.put( key, color );
+				put( properties, key, color );
 		}
 	}
 
-	private ColorUIResource toColor( String value ) {
+	private String toColor( String value ) {
+		if( value.startsWith( "##" ) )
+			value = fixColorIfValid( value.substring( 1 ), value );
+
 		// map named colors
-		ColorUIResource color = namedColors.get( value );
+		String color = namedColors.get( value );
 
 		// parse color
-		return (color != null) ? color : parseColor( value );
+		return (color != null) ? color : (canParseColor( value ) ? value : null);
 	}
 
-	private ColorUIResource parseColor( String value ) {
+	private boolean canParseColor( String value ) {
 		try {
-			return UIDefaultsLoader.parseColor( value );
+			return UIDefaultsLoader.parseColor( value ) != null;
 		} catch( IllegalArgumentException ex ) {
-			return null;
+			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to parse color: '" + value + '\'', ex );
+			return false;
 		}
 	}
 
 	/**
 	 * Because IDEA uses SVGs for check boxes and radio buttons, the colors for
-	 * this two components are specified in "icons > ColorPalette".
-	 * FlatLaf uses vector icons and expects colors for the two components in UI defaults.
+	 * these two components are specified in "icons > ColorPalette".
+	 * FlatLaf uses vector icons and expects colors for the two components in properties.
 	 */
-	private void applyCheckBoxColors( UIDefaults defaults ) {
-		if( icons == null )
+	private void applyCheckBoxColors( Properties properties ) {
+		if( jsonIcons == null )
 			return;
 
-		Object palette = icons.get( "ColorPalette" );
+		Object palette = jsonIcons.get( "ColorPalette" );
 		if( !(palette instanceof Map) )
 			return;
 
@@ -486,18 +601,6 @@ public class IntelliJTheme
 			if( !key.startsWith( "Checkbox." ) || !(value instanceof String) )
 				continue;
 
-			if( key.equals( "Checkbox.Background.Default" ) ||
-				key.equals( "Checkbox.Foreground.Selected" ) )
-			{
-				// This two keys do not work correctly in IDEA because they
-				// map SVG color "#ffffff" to another color, but checkBox.svg and
-				// radio.svg (in package com.intellij.ide.ui.laf.icons.intellij)
-				// use "#fff". So use white to get same appearance as in IDEA.
-				value = "#ffffff";
-			}
-
-			String key2 = checkboxDuplicateColors.get( key );
-
 			if( dark )
 				key = StringUtils.removeTrailing( key, ".Dark" );
 
@@ -507,10 +610,11 @@ public class IntelliJTheme
 				if( !dark && newKey.startsWith( checkBoxIconPrefix ) )
 					newKey = "CheckBox.icon[filled].".concat( newKey.substring( checkBoxIconPrefix.length() ) );
 
-				ColorUIResource color = toColor( (String) value );
+				String color = toColor( (String) value );
 				if( color != null ) {
-					defaults.put( newKey, color );
+					put( properties, newKey, color );
 
+					String key2 = checkboxDuplicateColors.get( key + ".Dark");
 					if( key2 != null ) {
 						// When IDEA replaces colors in SVGs it uses color values and not the keys
 						// from com.intellij.ide.ui.UITheme.colorPalette, but there are some keys that
@@ -529,7 +633,7 @@ public class IntelliJTheme
 
 						String newKey2 = checkboxKeyMapping.get( key2 );
 						if( newKey2 != null )
-							defaults.put( newKey2, color );
+							put( properties, newKey2, color );
 					}
 				}
 
@@ -540,13 +644,13 @@ public class IntelliJTheme
 		// update hover, pressed and focused colors
 		if( checkboxModified ) {
 			// for non-filled checkbox/radiobutton used in dark themes
-			defaults.remove( "CheckBox.icon.focusWidth" );
-			defaults.put( "CheckBox.icon.hoverBorderColor", defaults.get( "CheckBox.icon.focusedBorderColor" ) );
+			properties.remove( "CheckBox.icon.focusWidth" );
+			put( properties, "CheckBox.icon.hoverBorderColor", properties.get( "CheckBox.icon.focusedBorderColor" ) );
 
 			// for filled checkbox/radiobutton used in light themes
-			defaults.remove( "CheckBox.icon[filled].focusWidth" );
-			defaults.put( "CheckBox.icon[filled].hoverBorderColor", defaults.get( "CheckBox.icon[filled].focusedBorderColor" ) );
-			defaults.put( "CheckBox.icon[filled].focusedSelectedBackground", defaults.get( "CheckBox.icon[filled].selectedBackground" ) );
+			properties.remove( "CheckBox.icon[filled].focusWidth" );
+			put( properties, "CheckBox.icon[filled].hoverBorderColor", properties.get( "CheckBox.icon[filled].focusedBorderColor" ) );
+			put( properties, "CheckBox.icon[filled].focusedSelectedBackground", properties.get( "CheckBox.icon[filled].selectedBackground" ) );
 
 			if( dark ) {
 				// IDEA Darcula checkBoxFocused.svg, checkBoxSelectedFocused.svg,
@@ -560,45 +664,98 @@ public class IntelliJTheme
 					"CheckBox.icon[filled].focusedSelectedBorderColor",
 				};
 				for( String key : focusedBorderColorKeys ) {
-					Color color = defaults.getColor( key );
-					if( color != null ) {
-						defaults.put( key, new ColorUIResource( new Color(
-							(color.getRGB() & 0xffffff) | 0xa6000000, true ) ) );
-					}
+					Object color = properties.get( key );
+					if( color != null )
+						put( properties, key, "fade(" + color + ", 65%)" );
 				}
 			}
 		}
 	}
 
-	private void copyIfNotSet( UIDefaults defaults, String destKey, String srcKey, Set<String> uiKeys ) {
-		if( !uiKeys.contains( destKey ) )
-			defaults.put( destKey, defaults.get( srcKey ) );
-	}
-
+	private static final Set<String> uiKeyExcludesStartsWith;
+	private static final String[] uiKeyExcludesContains;
+	private static final Set<String> uiKeyDoNotOverride;
 	/** Rename UI default keys (key --> value). */
 	private static final Map<String, String> uiKeyMapping = new HashMap<>();
 	/** Copy UI default keys (value --> key). */
-	private static final Map<String, String> uiKeyCopying = new HashMap<>();
+	private static final Map<String, String> uiKeyCopying = new LinkedHashMap<>();
 	private static final Map<String, String> uiKeyInverseMapping = new HashMap<>();
 	private static final Map<String, String> checkboxKeyMapping = new HashMap<>();
 	private static final Map<String, String> checkboxDuplicateColors = new HashMap<>();
 
 	static {
+		// IntelliJ UI properties that are not used in FlatLaf
+		uiKeyExcludesStartsWith = new HashSet<>( Arrays.asList(
+			"ActionButton.", "ActionToolbar.", "ActionsList.", "AppInspector.", "AssignedMnemonic.", "Autocomplete.",
+			"AvailableMnemonic.",
+			"Badge.", "Banner.", "BigSpinner.", "Bookmark.", "BookmarkIcon.", "BookmarkMnemonicAssigned.", "BookmarkMnemonicAvailable.",
+			"BookmarkMnemonicCurrent.", "BookmarkMnemonicIcon.", "Borders.", "Breakpoint.",
+			"Canvas.", "CellEditor.", "Code.", "CodeWithMe.", "ColumnControlButton.", "CombinedDiff.", "ComboBoxButton.",
+			"CompilationCharts.", "CompletionPopup.", "ComplexPopup.", "Content.", "ContextHelp.", "CurrentMnemonic.", "Counter.",
+			"Debugger.", "DebuggerPopup.", "DebuggerTabs.", "DefaultTabs.", "Dialog.", "DialogWrapper.",
+			"DisclosureButton.", "DragAndDrop.",
+			"Editor.", "EditorGroupsTabs.", "EditorTabs.",
+			"FileColor.", "FindPopup.", "FlameGraph.", "Focus.",
+			"Git.", "Github.", "GotItTooltip.", "Group.", "Gutter.", "GutterTooltip.",
+			"HeaderColor.", "HelpTooltip.", "Hg.",
+			"IconBadge.", "InformationHint.", "InlineBanner.", "InplaceRefactoringPopup.",
+			"Lesson.", "LineProfiler.", "Link.", "LiveIndicator.",
+			"MainMenu.", "MainToolbar.", "MainWindow.", "MemoryIndicator.", "MlModelBinding.", "MnemonicIcon.",
+			"NavBar.", "NewClass.", "NewPSD.", "Notification.", "Notifications.", "NotificationsToolwindow.",
+			"OnePixelDivider.", "OptionButton.", "Outline.",
+			"ParameterInfo.", "PresentationAssistant.", "Plugins.", "Profiler.", "ProgressIcon.", "PsiViewer.",
+			"Resizable.", "Review.", "ReviewList.", "RunToolbar.", "RunWidget.",
+			"ScreenView.", "SearchEverywhere.", "SearchFieldWithExtension.", "SearchMatch.", "SearchOption.",
+			"SearchResults.", "SegmentedButton.", "Settings.", "SidePanel.", "Space.", "SpeedSearch.", "StateWidget.",
+			"StatusBar.", "StripeToolbar.",
+			"Tag.", "TipOfTheDay.", "ToolbarComboWidget.", "ToolWindow.", "TrialWidget.",
+			"UIDesigner.", "UnattendedHostStatus.",
+			"ValidationTooltip.", "VersionControl.",
+			"WelcomeScreen.",
+
+			// lower case
+			"darcula.", "dropArea.", "icons.", "intellijlaf.", "macOSWindow.", "material.", "tooltips.",
+
+			// possible typos in .theme.json files
+			"Checkbox.", "Toolbar.", "Tooltip.", "UiDesigner.", "link."
+		) );
+		uiKeyExcludesContains = new String[] {
+			".darcula."
+		};
+
+		uiKeyDoNotOverride = new HashSet<>( Arrays.asList(
+			"TabbedPane.selectedForeground"
+		) );
+
+		// "*."
+		uiKeyMapping.put( "*.fontFace", "" ); // ignore (used in OnePauintxi themes)
+		uiKeyMapping.put( "*.fontSize", "" ); // ignore (used in OnePauintxi themes)
+
+		// Button
+		uiKeyMapping.put( "Button.minimumSize", "" ); // ignore (used in Material Theme UI Lite)
+
+		// CheckBox.iconSize
+		uiKeyMapping.put( "CheckBox.iconSize", "" ); // ignore (used in Rider themes)
+
 		// ComboBox
 		uiKeyMapping.put( "ComboBox.background",                        "" ); // ignore
+		uiKeyMapping.put( "ComboBox.buttonBackground",                  "" ); // ignore
 		uiKeyMapping.put( "ComboBox.nonEditableBackground",             "ComboBox.background" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.background",            "ComboBox.buttonEditableBackground" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.disabledIconColor",     "ComboBox.buttonDisabledArrowColor" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.iconColor",             "ComboBox.buttonArrowColor" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.nonEditableBackground", "ComboBox.buttonBackground" );
-		uiKeyCopying.put( "ComboBox.buttonSeparatorColor",              "Component.borderColor" );
-		uiKeyCopying.put( "ComboBox.buttonDisabledSeparatorColor",      "Component.disabledBorderColor" );
 
 		// Component
 		uiKeyMapping.put( "Component.inactiveErrorFocusColor",   "Component.error.borderColor" );
 		uiKeyMapping.put( "Component.errorFocusColor",           "Component.error.focusedBorderColor" );
 		uiKeyMapping.put( "Component.inactiveWarningFocusColor", "Component.warning.borderColor" );
 		uiKeyMapping.put( "Component.warningFocusColor",         "Component.warning.focusedBorderColor" );
+		uiKeyMapping.put( "Component.inactiveSuccessFocusColor", "Component.success.borderColor" );
+		uiKeyMapping.put( "Component.successFocusColor",         "Component.success.focusedBorderColor" );
+
+		// Label
+		uiKeyMapping.put( "Label.disabledForegroundColor", "" ); // ignore (used in Material Theme UI Lite)
 
 		// Link
 		uiKeyMapping.put( "Link.activeForeground", "Component.linkColor" );
@@ -606,10 +763,7 @@ public class IntelliJTheme
 		// Menu
 		uiKeyMapping.put( "Menu.border",                "Menu.margin" );
 		uiKeyMapping.put( "MenuItem.border",            "MenuItem.margin" );
-		uiKeyCopying.put( "CheckBoxMenuItem.margin",    "MenuItem.margin" );
-		uiKeyCopying.put( "RadioButtonMenuItem.margin", "MenuItem.margin" );
 		uiKeyMapping.put( "PopupMenu.border",           "PopupMenu.borderInsets" );
-		uiKeyCopying.put( "MenuItem.underlineSelectionColor", "TabbedPane.underlineColor" );
 
 		// IDEA uses List.selectionBackground also for menu selection
 		uiKeyCopying.put( "Menu.selectionBackground",                "List.selectionBackground" );
@@ -617,13 +771,14 @@ public class IntelliJTheme
 		uiKeyCopying.put( "CheckBoxMenuItem.selectionBackground",    "List.selectionBackground" );
 		uiKeyCopying.put( "RadioButtonMenuItem.selectionBackground", "List.selectionBackground" );
 
-		// ProgressBar
+		// ProgressBar: IDEA uses ProgressBar.trackColor and ProgressBar.progressColor
 		uiKeyMapping.put( "ProgressBar.background",    "" ); // ignore
 		uiKeyMapping.put( "ProgressBar.foreground",    "" ); // ignore
 		uiKeyMapping.put( "ProgressBar.trackColor",    "ProgressBar.background" );
 		uiKeyMapping.put( "ProgressBar.progressColor", "ProgressBar.foreground" );
-		uiKeyCopying.put( "ProgressBar.selectionForeground", "ProgressBar.background" );
-		uiKeyCopying.put( "ProgressBar.selectionBackground", "ProgressBar.foreground" );
+
+		// RadioButton
+		uiKeyMapping.put( "RadioButton.iconSize", "" ); // ignore (used in Rider themes)
 
 		// ScrollBar
 		uiKeyMapping.put( "ScrollBar.trackColor", "ScrollBar.track" );
@@ -633,34 +788,30 @@ public class IntelliJTheme
 		uiKeyMapping.put( "Separator.separatorColor", "Separator.foreground" );
 
 		// Slider
+		uiKeyMapping.put( "Slider.buttonColor", "Slider.thumbColor" );
+		uiKeyMapping.put( "Slider.buttonBorderColor", "" ); // ignore
+		uiKeyMapping.put( "Slider.thumb", "" ); // ignore (used in Material Theme UI Lite)
+		uiKeyMapping.put( "Slider.track", "" ); // ignore (used in Material Theme UI Lite)
+		uiKeyMapping.put( "Slider.trackDisabled", "" ); // ignore (used in Material Theme UI Lite)
 		uiKeyMapping.put( "Slider.trackWidth", "" ); // ignore (used in Material Theme UI Lite)
-		uiKeyCopying.put( "Slider.trackValueColor", "ProgressBar.foreground" );
-		uiKeyCopying.put( "Slider.thumbColor", "ProgressBar.foreground" );
-		uiKeyCopying.put( "Slider.trackColor", "ProgressBar.background" );
-
-		// Spinner
-		uiKeyCopying.put( "Spinner.buttonSeparatorColor",         "Component.borderColor" );
-		uiKeyCopying.put( "Spinner.buttonDisabledSeparatorColor", "Component.disabledBorderColor" );
 
 		// TabbedPane
-		uiKeyCopying.put( "TabbedPane.selectedBackground",     "DefaultTabs.underlinedTabBackground" );
-		uiKeyCopying.put( "TabbedPane.selectedForeground",     "DefaultTabs.underlinedTabForeground" );
-		uiKeyCopying.put( "TabbedPane.inactiveUnderlineColor", "DefaultTabs.inactiveUnderlineColor" );
+		uiKeyMapping.put( "DefaultTabs.underlinedTabBackground", "TabbedPane.selectedBackground" );
+		uiKeyMapping.put( "DefaultTabs.underlinedTabForeground", "TabbedPane.selectedForeground" );
+		uiKeyMapping.put( "DefaultTabs.inactiveUnderlineColor",  "TabbedPane.inactiveUnderlineColor" );
+		uiKeyMapping.put( "TabbedPane.tabAreaInsets", "" ); // ignore (used in Material Theme UI Lite)
+
+		// TableHeader
+		uiKeyMapping.put( "TableHeader.cellBorder", "" ); // ignore (used in Material Theme UI Lite)
+		uiKeyMapping.put( "TableHeader.height", "" ); // ignore (used in Material Theme UI Lite)
 
 		// TitlePane
-		uiKeyCopying.put( "TitlePane.inactiveBackground",     "TitlePane.background" );
 		uiKeyMapping.put( "TitlePane.infoForeground",         "TitlePane.foreground" );
 		uiKeyMapping.put( "TitlePane.inactiveInfoForeground", "TitlePane.inactiveForeground" );
 
 		for( Map.Entry<String, String> e : uiKeyMapping.entrySet() )
 			uiKeyInverseMapping.put( e.getValue(), e.getKey() );
 
-		uiKeyCopying.put( "ToggleButton.tab.underlineColor",         "TabbedPane.underlineColor" );
-		uiKeyCopying.put( "ToggleButton.tab.disabledUnderlineColor", "TabbedPane.disabledUnderlineColor" );
-		uiKeyCopying.put( "ToggleButton.tab.selectedBackground",     "TabbedPane.selectedBackground" );
-		uiKeyCopying.put( "ToggleButton.tab.hoverBackground",        "TabbedPane.hoverColor" );
-		uiKeyCopying.put( "ToggleButton.tab.focusBackground",        "TabbedPane.focusColor" );
-
 		checkboxKeyMapping.put( "Checkbox.Background.Default",  "CheckBox.icon.background" );
 		checkboxKeyMapping.put( "Checkbox.Background.Disabled", "CheckBox.icon.disabledBackground" );
 		checkboxKeyMapping.put( "Checkbox.Border.Default",      "CheckBox.icon.borderColor" );
@@ -713,17 +864,15 @@ public class IntelliJTheme
 		}
 
 		@Override
-		void applyAdditionalDefaults( UIDefaults defaults ) {
-			theme.applyProperties( defaults );
+		void applyAdditionalProperties( Properties properties ) {
+			theme.applyProperties( properties );
 		}
 
 		@Override
 		protected ArrayList<Class<?>> getLafClassesForDefaultsLoading() {
-			ArrayList<Class<?>> lafClasses = new ArrayList<>();
-			lafClasses.add( FlatLaf.class );
-			lafClasses.add( theme.dark ? FlatDarkLaf.class : FlatLightLaf.class );
-			lafClasses.add( theme.dark ? FlatDarculaLaf.class : FlatIntelliJLaf.class );
-			lafClasses.add( ThemeLaf.class );
+			ArrayList<Class<?>> lafClasses = UIDefaultsLoader.getLafClassesForDefaultsLoading( getClass() );
+			lafClasses.add( 1, theme.dark ? FlatDarkLaf.class : FlatLightLaf.class );
+			lafClasses.add( 2, theme.dark ? FlatDarculaLaf.class : FlatIntelliJLaf.class );
 			return lafClasses;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxFontPolicy.java

@@ -23,11 +23,14 @@ import java.awt.GraphicsEnvironment;
 import java.awt.Toolkit;
 import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileReader;
+import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.StringTokenizer;
 import javax.swing.text.StyleContext;
 import com.formdev.flatlaf.util.LoggingFacade;
@@ -68,7 +71,7 @@ class LinuxFontPolicy
 			if( word.endsWith( "," ) )
 				word = word.substring( 0, word.length() - 1 ).trim();
 
-			String lword = word.toLowerCase();
+			String lword = word.toLowerCase( Locale.ENGLISH );
 			if( lword.equals( "italic" ) || lword.equals( "oblique" ) )
 				style |= Font.ITALIC;
 			else if( lword.equals( "bold" ) )
@@ -104,11 +107,11 @@ class LinuxFontPolicy
 			size = 1;
 
 		// handle logical font names
-		String logicalFamily = mapFcName( family.toLowerCase() );
+		String logicalFamily = mapFcName( family.toLowerCase( Locale.ENGLISH ) );
 		if( logicalFamily != null )
 			family = logicalFamily;
 
-		return createFontEx( family, style, size, dsize );
+		return createFontEx( family, style, size );
 	}
 
 	/**
@@ -118,9 +121,9 @@ class LinuxFontPolicy
 	 * E.g. family 'URW Bookman Light' is not found, but 'URW Bookman' is found.
 	 * If still not found, then font of family 'Dialog' is returned.
 	 */
-	private static Font createFontEx( String family, int style, int size, double dsize ) {
+	private static Font createFontEx( String family, int style, int size ) {
 		for(;;) {
-			Font font = createFont( family, style, size, dsize );
+			Font font = FlatLaf.createCompositeFont( family, style, size );
 
 			if( Font.DIALOG.equals( family ) )
 				return font;
@@ -132,7 +135,7 @@ class LinuxFontPolicy
 				// - character width is zero (e.g. font Cantarell; Fedora; Oracle Java 8)
 				FontMetrics fm = StyleContext.getDefaultStyleContext().getFontMetrics( font );
 				if( fm.getHeight() > size * 2 || fm.stringWidth( "a" ) == 0 )
-					return createFont( Font.DIALOG, style, size, dsize );
+					return FlatLaf.createCompositeFont( Font.DIALOG, style, size );
 
 				return font;
 			}
@@ -140,10 +143,10 @@ class LinuxFontPolicy
 			// find last word in family
 			int index = family.lastIndexOf( ' ' );
 			if( index < 0 )
-				return createFont( Font.DIALOG, style, size, dsize );
+				return FlatLaf.createCompositeFont( Font.DIALOG, style, size );
 
 			// check whether last work contains some font weight (e.g. Ultra-Bold or Heavy)
-			String lastWord = family.substring( index + 1 ).toLowerCase();
+			String lastWord = family.substring( index + 1 ).toLowerCase( Locale.ENGLISH );
 			if( lastWord.contains( "bold" ) || lastWord.contains( "heavy" ) || lastWord.contains( "black" ) )
 				style |= Font.BOLD;
 
@@ -152,15 +155,6 @@ class LinuxFontPolicy
 		}
 	}
 
-	private static Font createFont( String family, int style, int size, double dsize ) {
-		Font font = FlatLaf.createCompositeFont( family, style, size );
-
-		// set font size in floating points
-		font = font.deriveFont( style, (float) dsize );
-
-		return font;
-	}
-
 	private static double getGnomeFontScale() {
 		// do not scale font here if JRE scales
 		if( isSystemScaling() )
@@ -200,7 +194,7 @@ class LinuxFontPolicy
 	 * Gets the default font for KDE from KDE configuration files.
 	 *
 	 * The Swing fonts are not updated when the user changes system font size
-	 * (System Settings > Fonts > Force Font DPI). A application restart is necessary.
+	 * (System Settings > Fonts > Force Font DPI). An application restart is necessary.
 	 * This is the same behavior as in native KDE applications.
 	 *
 	 * The "display scale factor" (kdeglobals: [KScreen] > ScaleFactor) is not used
@@ -254,9 +248,10 @@ class LinuxFontPolicy
 		if( size < 1 )
 			size = 1;
 
-		return createFont( family, style, size, dsize );
+		return FlatLaf.createCompositeFont( family, style, size );
 	}
 
+	@SuppressWarnings( "MixedMutabilityReturnType" ) // Error Prone
 	private static List<String> readConfig( String filename ) {
 		File userHome = new File( System.getProperty( "user.home" ) );
 
@@ -277,7 +272,9 @@ class LinuxFontPolicy
 
 		// read config file
 		ArrayList<String> lines = new ArrayList<>( 200 );
-		try( BufferedReader reader = new BufferedReader( new FileReader( file ) ) ) {
+		try( BufferedReader reader = new BufferedReader( new InputStreamReader(
+			new FileInputStream( file ), StandardCharsets.US_ASCII ) ) )
+		{
 			String line;
 			while( (line = reader.readLine()) != null )
 				lines.add( line );

flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxPopupMenuCanceler.java

@@ -0,0 +1,166 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf;
+
+import java.awt.Component;
+import java.awt.Window;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import javax.swing.JPopupMenu;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.SwingUtilities;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+
+/**
+ * Cancels (hides) popup menus on Linux.
+ * <p>
+ * On Linux, popups are not hidden under following conditions, which results in
+ * misplaced popups:
+ * <ul>
+ *   <li>window moved or resized
+ *   <li>window maximized or restored
+ *   <li>window iconified
+ *   <li>window deactivated (e.g. activated other application)
+ * </ul>
+ *
+ * On Windows and macOS, popups are automatically hidden.
+ * <p>
+ * The implementation is similar to what's done in
+ * {@code javax.swing.plaf.basic.BasicPopupMenuUI.MouseGrabber},
+ * but only hides popup in some conditions.
+ *
+ * @author Karl Tauber
+ */
+class LinuxPopupMenuCanceler
+	extends WindowAdapter
+	implements ChangeListener, ComponentListener
+{
+	private MenuElement[] lastPathSelectedPath;
+	private Window window;
+
+	LinuxPopupMenuCanceler() {
+		MenuSelectionManager msm = MenuSelectionManager.defaultManager();
+		msm.addChangeListener( this );
+
+		lastPathSelectedPath = msm.getSelectedPath();
+		if( lastPathSelectedPath.length > 0 )
+			addWindowListeners( lastPathSelectedPath[0] );
+	}
+
+	void uninstall() {
+		MenuSelectionManager.defaultManager().removeChangeListener( this );
+	}
+
+	private void addWindowListeners( MenuElement selected ) {
+		removeWindowListeners();
+
+		// see BasicPopupMenuUI.MouseGrabber.grabWindow()
+		Component invoker = selected.getComponent();
+		if( invoker instanceof JPopupMenu )
+			invoker = ((JPopupMenu)invoker).getInvoker();
+		window = (invoker instanceof Window)
+			? (Window) invoker
+			: SwingUtilities.windowForComponent( invoker );
+
+		if( window != null ) {
+			window.addWindowListener( this );
+			window.addComponentListener( this );
+		}
+	}
+
+	private void removeWindowListeners() {
+		if( window != null ) {
+			window.removeWindowListener( this );
+			window.removeComponentListener( this );
+			window = null;
+		}
+	}
+
+	private void cancelPopupMenu() {
+		try {
+			MenuSelectionManager msm = MenuSelectionManager.defaultManager();
+			MenuElement[] selectedPath = msm.getSelectedPath();
+			for( MenuElement e : selectedPath ) {
+				if( e instanceof JPopupMenu )
+					((JPopupMenu)e).putClientProperty( "JPopupMenu.firePopupMenuCanceled", true );
+			}
+			msm.clearSelectedPath();
+		} catch( RuntimeException ex ) {
+			removeWindowListeners();
+			throw ex;
+		} catch( Error ex ) {
+			removeWindowListeners();
+			throw ex;
+		}
+	}
+
+	//---- ChangeListener ----
+
+	@Override
+	public void stateChanged( ChangeEvent e ) {
+		MenuElement[] selectedPath = MenuSelectionManager.defaultManager().getSelectedPath();
+
+		if( selectedPath.length == 0 )
+			removeWindowListeners();
+		else if( lastPathSelectedPath.length == 0 )
+			addWindowListeners( selectedPath[0] );
+
+		lastPathSelectedPath = selectedPath;
+	}
+
+	//---- WindowListener ----
+
+	@Override
+	public void windowIconified( WindowEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void windowDeactivated( WindowEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void windowClosing( WindowEvent e ) {
+		cancelPopupMenu();
+	}
+
+	//---- ComponentListener ----
+
+	@Override
+	public void componentResized( ComponentEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void componentMoved( ComponentEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void componentShown( ComponentEvent e ) {
+	}
+
+	@Override
+	public void componentHidden( ComponentEvent e ) {
+		cancelPopupMenu();
+	}
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/SubMenuUsabilityHelper.java

@@ -45,6 +45,7 @@ import javax.swing.UIManager;
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
  * Improves usability of submenus by using a
@@ -64,6 +65,7 @@ class SubMenuUsabilityHelper
 	// https://github.com/apache/netbeans/issues/4231#issuecomment-1179616607
 	private static SubMenuUsabilityHelper instance;
 
+	private boolean eventQueuePushNotSupported;
 	private SubMenuEventQueue subMenuEventQueue;
 	private SafeTrianglePainter safeTrianglePainter;
 	private boolean changePending;
@@ -83,6 +85,9 @@ class SubMenuUsabilityHelper
 		if( instance != null )
 			return false;
 
+		if( !FlatSystemProperties.getBoolean( FlatSystemProperties.USE_SUB_MENU_SAFE_TRIANGLE, true ) )
+			return false;
+
 		instance = new SubMenuUsabilityHelper();
 		MenuSelectionManager.defaultManager().addChangeListener( instance );
 		return true;
@@ -99,7 +104,7 @@ class SubMenuUsabilityHelper
 
 	@Override
 	public void stateChanged( ChangeEvent e ) {
-		if( !FlatUIUtils.getUIBoolean( KEY_USE_SAFE_TRIANGLE, true ))
+		if( eventQueuePushNotSupported || !FlatUIUtils.getUIBoolean( KEY_USE_SAFE_TRIANGLE, true ))
 			return;
 
 		// handle menu selection change later, but only once in case of temporary changes
@@ -153,7 +158,7 @@ debug*/
 
 		// get invoker screen bounds
 		Component invoker = popup.getInvoker();
-		invokerBounds = (invoker != null)
+		invokerBounds = (invoker != null && invoker.isShowing())
 			? new Rectangle( invoker.getLocationOnScreen(), invoker.getSize() )
 			: null;
 
@@ -172,9 +177,30 @@ debug*/
 		targetTopY = popupLocation.y;
 		targetBottomY = popupLocation.y + popupSize.height;
 
-		// install own event queue to supress mouse events when mouse is moved within safe triangle
-		if( subMenuEventQueue == null )
-			subMenuEventQueue = new SubMenuEventQueue();
+		// install own event queue to suppress mouse events when mouse is moved within safe triangle
+		if( subMenuEventQueue == null ) {
+			SubMenuEventQueue queue = new SubMenuEventQueue();
+
+			try {
+				Toolkit toolkit = Toolkit.getDefaultToolkit();
+				toolkit.getSystemEventQueue().push( queue );
+
+				// check whether push() worked
+				// (e.g. SWTSwing uses own event queue that does not support push())
+				if( toolkit.getSystemEventQueue() != queue ) {
+					eventQueuePushNotSupported = true;
+					LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to push submenu event queue. Disabling submenu safe triangle.", null );
+					return;
+				}
+
+				subMenuEventQueue = queue;
+			} catch( RuntimeException ex ) {
+				// catch runtime exception from EventQueue.push()
+				eventQueuePushNotSupported = true;
+				LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to push submenu event queue. Disabling submenu safe triangle.", ex );
+				return;
+			}
+		}
 
 		// create safe triangle painter
 		if( safeTrianglePainter == null && UIManager.getBoolean( KEY_SHOW_SAFE_TRIANGLE ) )
@@ -247,8 +273,6 @@ debug*/
 				}
 			} );
 			timeoutTimer.setRepeats( false );
-
-			Toolkit.getDefaultToolkit().getSystemEventQueue().push( this );
 		}
 
 		void uninstall() {

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatAbstractIcon.java

@@ -57,6 +57,8 @@ public abstract class FlatAbstractIcon
 //			g2.setColor( Color.blue );
 //			g2.drawRect( x, y, getIconWidth() - 1, getIconHeight() - 1 );
 
+			paintBackground( c, g2, x, y );
+
 			g2.translate( x, y );
 			UIScale.scaleGraphics( g2 );
 
@@ -69,7 +71,11 @@ public abstract class FlatAbstractIcon
 		}
 	}
 
-	protected abstract void paintIcon( Component c, Graphics2D g2 );
+	/** @since 3.5.2 */
+	protected void paintBackground( Component c, Graphics2D g, int x, int y ) {
+	}
+
+	protected abstract void paintIcon( Component c, Graphics2D g );
 
 	@Override
 	public int getIconWidth() {

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatCapsLockIcon.java

@@ -25,7 +25,10 @@ import java.awt.geom.Area;
 import java.awt.geom.Path2D;
 import java.awt.geom.Rectangle2D;
 import java.awt.geom.RoundRectangle2D;
+import java.util.Collections;
+import java.util.Map;
 import javax.swing.UIManager;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
@@ -38,6 +41,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  */
 public class FlatCapsLockIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	private Path2D path;
 
@@ -46,6 +50,7 @@ public class FlatCapsLockIcon
 	}
 
 	/** @since 2 */
+	@Override
 	public Object applyStyleProperty( String key, Object value ) {
 		Object oldValue;
 		switch( key ) {
@@ -54,7 +59,14 @@ public class FlatCapsLockIcon
 		}
 	}
 
+	/** @since 3.7 */
+	@Override
+	public Map<String, Class<?>> getStyleableInfos() throws IllegalArgumentException {
+		return Collections.singletonMap( "capsLockIconColor", Color.class );
+	}
+
 	/** @since 2.5 */
+	@Override
 	public Object getStyleableValue( String key ) {
 		switch( key ) {
 			case "capsLockIconColor": return color;

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatCheckBoxIcon.java

@@ -17,19 +17,19 @@
 package com.formdev.flatlaf.icons;
 
 import static com.formdev.flatlaf.FlatClientProperties.*;
+import static com.formdev.flatlaf.ui.FlatUIUtils.stateColor;
 import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
 import java.awt.geom.RoundRectangle2D;
-import java.util.Map;
 import javax.swing.AbstractButton;
 import javax.swing.JComponent;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -48,6 +48,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  * @uiDefault CheckBox.icon.borderWidth					int or float	optional; defaults to Component.borderWidth
  * @uiDefault CheckBox.icon.selectedBorderWidth			int or float	optional; defaults to CheckBox.icon.borderWidth
  * @uiDefault CheckBox.icon.disabledSelectedBorderWidth	int or float	optional; defaults to CheckBox.icon.selectedBorderWidth
+ * @uiDefault CheckBox.icon.indeterminateBorderWidth			int or float	optional; defaults to CheckBox.icon.selectedBorderWidth
+ * @uiDefault CheckBox.icon.disabledIndeterminateBorderWidth	int or float	optional; defaults to CheckBox.icon.disabledSelectedBorderWidth
  * @uiDefault CheckBox.arc								int
  *
  * @uiDefault CheckBox.icon.focusColor					Color	optional; defaults to Component.focusColor
@@ -56,35 +58,51 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  * @uiDefault CheckBox.icon.selectedBorderColor			Color
  * @uiDefault CheckBox.icon.selectedBackground			Color
  * @uiDefault CheckBox.icon.checkmarkColor				Color
+ * @uiDefault CheckBox.icon.indeterminateBorderColor	Color	optional; defaults to CheckBox.icon.selectedBorderColor
+ * @uiDefault CheckBox.icon.indeterminateBackground		Color	optional; defaults to CheckBox.icon.selectedBackground
+ * @uiDefault CheckBox.icon.indeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.checkmarkColor
  *
- * @uiDefault CheckBox.icon.disabledBorderColor			Color
- * @uiDefault CheckBox.icon.disabledBackground			Color
- * @uiDefault CheckBox.icon.disabledSelectedBorderColor	Color	optional; CheckBox.icon.disabledBorderColor is used if not specified
- * @uiDefault CheckBox.icon.disabledSelectedBackground	Color	optional; CheckBox.icon.disabledBackground is used if not specified
- * @uiDefault CheckBox.icon.disabledCheckmarkColor		Color
+ * @uiDefault CheckBox.icon.disabledBorderColor					Color
+ * @uiDefault CheckBox.icon.disabledBackground					Color
+ * @uiDefault CheckBox.icon.disabledSelectedBorderColor			Color	optional; defaults to CheckBox.icon.disabledBorderColor
+ * @uiDefault CheckBox.icon.disabledSelectedBackground			Color	optional; defaults to CheckBox.icon.disabledBackground
+ * @uiDefault CheckBox.icon.disabledCheckmarkColor				Color
+ * @uiDefault CheckBox.icon.disabledIndeterminateBorderColor	Color	optional; defaults to CheckBox.icon.disabledSelectedBorderColor
+ * @uiDefault CheckBox.icon.disabledIndeterminateBackground		Color	optional; defaults to CheckBox.icon.disabledSelectedBackground
+ * @uiDefault CheckBox.icon.disabledIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.disabledCheckmarkColor
  *
- * @uiDefault CheckBox.icon.focusedBorderColor			Color	optional
- * @uiDefault CheckBox.icon.focusedBackground			Color	optional
- * @uiDefault CheckBox.icon.focusedSelectedBorderColor	Color	optional; CheckBox.icon.focusedBorderColor is used if not specified
- * @uiDefault CheckBox.icon.focusedSelectedBackground	Color	optional; CheckBox.icon.focusedBackground is used if not specified
- * @uiDefault CheckBox.icon.focusedCheckmarkColor		Color	optional; CheckBox.icon.checkmarkColor is used if not specified
+ * @uiDefault CheckBox.icon.focusedBorderColor					Color	optional
+ * @uiDefault CheckBox.icon.focusedBackground					Color	optional
+ * @uiDefault CheckBox.icon.focusedSelectedBorderColor			Color	optional; defaults to CheckBox.icon.focusedBorderColor
+ * @uiDefault CheckBox.icon.focusedSelectedBackground			Color	optional; defaults to CheckBox.icon.focusedBackground
+ * @uiDefault CheckBox.icon.focusedCheckmarkColor				Color	optional; defaults to CheckBox.icon.checkmarkColor
+ * @uiDefault CheckBox.icon.focusedIndeterminateBorderColor		Color	optional; defaults to CheckBox.icon.focusedSelectedBorderColor
+ * @uiDefault CheckBox.icon.focusedIndeterminateBackground		Color	optional; defaults to CheckBox.icon.focusedSelectedBackground
+ * @uiDefault CheckBox.icon.focusedIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.focusedCheckmarkColor
  *
- * @uiDefault CheckBox.icon.hoverBorderColor			Color	optional
- * @uiDefault CheckBox.icon.hoverBackground				Color	optional
- * @uiDefault CheckBox.icon.hoverSelectedBorderColor	Color	optional; CheckBox.icon.hoverBorderColor is used if not specified
- * @uiDefault CheckBox.icon.hoverSelectedBackground		Color	optional; CheckBox.icon.hoverBackground is used if not specified
- * @uiDefault CheckBox.icon.hoverCheckmarkColor			Color	optional; CheckBox.icon.checkmarkColor is used if not specified
+ * @uiDefault CheckBox.icon.hoverBorderColor					Color	optional
+ * @uiDefault CheckBox.icon.hoverBackground						Color	optional
+ * @uiDefault CheckBox.icon.hoverSelectedBorderColor			Color	optional; defaults to CheckBox.icon.hoverBorderColor
+ * @uiDefault CheckBox.icon.hoverSelectedBackground				Color	optional; defaults to CheckBox.icon.hoverBackground
+ * @uiDefault CheckBox.icon.hoverCheckmarkColor					Color	optional; defaults to CheckBox.icon.checkmarkColor
+ * @uiDefault CheckBox.icon.hoverIndeterminateBorderColor		Color	optional; defaults to CheckBox.icon.hoverSelectedBorderColor
+ * @uiDefault CheckBox.icon.hoverIndeterminateBackground		Color	optional; defaults to CheckBox.icon.hoverSelectedBackground
+ * @uiDefault CheckBox.icon.hoverIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.hoverCheckmarkColor
  *
- * @uiDefault CheckBox.icon.pressedBorderColor			Color	optional
- * @uiDefault CheckBox.icon.pressedBackground			Color	optional
- * @uiDefault CheckBox.icon.pressedSelectedBorderColor	Color	optional; CheckBox.icon.pressedBorderColor is used if not specified
- * @uiDefault CheckBox.icon.pressedSelectedBackground	Color	optional; CheckBox.icon.pressedBackground is used if not specified
- * @uiDefault CheckBox.icon.pressedCheckmarkColor		Color	optional; CheckBox.icon.checkmarkColor is used if not specified
+ * @uiDefault CheckBox.icon.pressedBorderColor					Color	optional
+ * @uiDefault CheckBox.icon.pressedBackground					Color	optional
+ * @uiDefault CheckBox.icon.pressedSelectedBorderColor			Color	optional; defaults to CheckBox.icon.pressedBorderColor
+ * @uiDefault CheckBox.icon.pressedSelectedBackground			Color	optional; defaults to CheckBox.icon.pressedBackground
+ * @uiDefault CheckBox.icon.pressedCheckmarkColor				Color	optional; defaults to CheckBox.icon.checkmarkColor
+ * @uiDefault CheckBox.icon.pressedIndeterminateBorderColor		Color	optional; defaults to CheckBox.icon.pressedSelectedBorderColor
+ * @uiDefault CheckBox.icon.pressedIndeterminateBackground		Color	optional; defaults to CheckBox.icon.pressedSelectedBackground
+ * @uiDefault CheckBox.icon.pressedIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.pressedCheckmarkColor
  *
  * @author Karl Tauber
  */
 public class FlatCheckBoxIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	protected final String style = UIManager.getString( getPropertyPrefix() + "icon.style" );
 	@Styleable protected float focusWidth = getUIFloat( "CheckBox.icon.focusWidth", UIManager.getInt( "Component.focusWidth" ), style );
@@ -92,6 +110,8 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected float borderWidth = getUIFloat( "CheckBox.icon.borderWidth", FlatUIUtils.getUIFloat( "Component.borderWidth", 1 ), style );
 	/** @since 2 */ @Styleable protected float selectedBorderWidth = getUIFloat( "CheckBox.icon.selectedBorderWidth", Float.MIN_VALUE, style );
 	/** @since 2 */ @Styleable protected float disabledSelectedBorderWidth = getUIFloat( "CheckBox.icon.disabledSelectedBorderWidth", Float.MIN_VALUE, style );
+	/** @since 3.6 */ @Styleable protected float indeterminateBorderWidth = getUIFloat( "CheckBox.icon.indeterminateBorderWidth", Float.MIN_VALUE, style );
+	/** @since 3.6 */ @Styleable protected float disabledIndeterminateBorderWidth = getUIFloat( "CheckBox.icon.disabledIndeterminateBorderWidth", Float.MIN_VALUE, style );
 	@Styleable protected int arc = FlatUIUtils.getUIInt( "CheckBox.arc", 2 );
 
 	// enabled
@@ -100,6 +120,9 @@ public class FlatCheckBoxIcon
 	@Styleable protected Color selectedBorderColor = getUIColor( "CheckBox.icon.selectedBorderColor", style );
 	@Styleable protected Color selectedBackground = getUIColor( "CheckBox.icon.selectedBackground", style );
 	@Styleable protected Color checkmarkColor = getUIColor( "CheckBox.icon.checkmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color indeterminateBorderColor = getUIColor( "CheckBox.icon.indeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color indeterminateBackground = getUIColor( "CheckBox.icon.indeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color indeterminateCheckmarkColor = getUIColor( "CheckBox.icon.indeterminateCheckmarkColor", style );
 
 	// disabled
 	@Styleable protected Color disabledBorderColor = getUIColor( "CheckBox.icon.disabledBorderColor", style );
@@ -107,6 +130,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color disabledSelectedBorderColor = getUIColor( "CheckBox.icon.disabledSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color disabledSelectedBackground = getUIColor( "CheckBox.icon.disabledSelectedBackground", style );
 	@Styleable protected Color disabledCheckmarkColor = getUIColor( "CheckBox.icon.disabledCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color disabledIndeterminateBorderColor = getUIColor( "CheckBox.icon.disabledIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color disabledIndeterminateBackground = getUIColor( "CheckBox.icon.disabledIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color disabledIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.disabledIndeterminateCheckmarkColor", style );
 
 	// focused
 	@Styleable protected Color focusedBorderColor = getUIColor( "CheckBox.icon.focusedBorderColor", style );
@@ -114,6 +140,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color focusedSelectedBorderColor = getUIColor( "CheckBox.icon.focusedSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color focusedSelectedBackground = getUIColor( "CheckBox.icon.focusedSelectedBackground", style );
 	/** @since 2 */ @Styleable protected Color focusedCheckmarkColor = getUIColor( "CheckBox.icon.focusedCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color focusedIndeterminateBorderColor = getUIColor( "CheckBox.icon.focusedIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color focusedIndeterminateBackground = getUIColor( "CheckBox.icon.focusedIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color focusedIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.focusedIndeterminateCheckmarkColor", style );
 
 	// hover
 	@Styleable protected Color hoverBorderColor = getUIColor( "CheckBox.icon.hoverBorderColor", style );
@@ -121,6 +150,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color hoverSelectedBorderColor = getUIColor( "CheckBox.icon.hoverSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color hoverSelectedBackground = getUIColor( "CheckBox.icon.hoverSelectedBackground", style );
 	/** @since 2 */ @Styleable protected Color hoverCheckmarkColor = getUIColor( "CheckBox.icon.hoverCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color hoverIndeterminateBorderColor = getUIColor( "CheckBox.icon.hoverIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color hoverIndeterminateBackground = getUIColor( "CheckBox.icon.hoverIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color hoverIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.hoverIndeterminateCheckmarkColor", style );
 
 	// pressed
 	/** @since 2 */ @Styleable protected Color pressedBorderColor = getUIColor( "CheckBox.icon.pressedBorderColor", style );
@@ -128,6 +160,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color pressedSelectedBorderColor = getUIColor( "CheckBox.icon.pressedSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color pressedSelectedBackground = getUIColor( "CheckBox.icon.pressedSelectedBackground", style );
 	/** @since 2 */ @Styleable protected Color pressedCheckmarkColor = getUIColor( "CheckBox.icon.pressedCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color pressedIndeterminateBorderColor = getUIColor( "CheckBox.icon.pressedIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color pressedIndeterminateBackground = getUIColor( "CheckBox.icon.pressedIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color pressedIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.pressedIndeterminateCheckmarkColor", style );
 
 	protected String getPropertyPrefix() {
 		return "CheckBox.";
@@ -162,31 +197,22 @@ public class FlatCheckBoxIcon
 		super( ICON_SIZE, ICON_SIZE, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		boolean indeterminate = isIndeterminate( c );
 		boolean selected = indeterminate || isSelected( c );
 		boolean isFocused = FlatUIUtils.isPermanentFocusOwner( c );
-		float bw = selected
-			? (disabledSelectedBorderWidth != Float.MIN_VALUE && !c.isEnabled()
-				? disabledSelectedBorderWidth
-				: (selectedBorderWidth != Float.MIN_VALUE ? selectedBorderWidth : borderWidth))
-			: borderWidth;
+		float bw = Float.MIN_VALUE;
+		if( !c.isEnabled() ) {
+			bw = (indeterminate && disabledIndeterminateBorderWidth != Float.MIN_VALUE)
+				? disabledIndeterminateBorderWidth
+				: (selected ? disabledSelectedBorderWidth : selectedBorderWidth);
+		}
+		if( bw == Float.MIN_VALUE ) {
+			bw = (indeterminate && indeterminateBorderWidth != Float.MIN_VALUE)
+				? indeterminateBorderWidth
+				: ((selected && selectedBorderWidth != Float.MIN_VALUE) ? selectedBorderWidth : borderWidth);
+		}
 
 		// paint focused border
 		if( isFocused && focusWidth > 0 && FlatButtonUI.isFocusPainted( c ) ) {
@@ -195,15 +221,15 @@ public class FlatCheckBoxIcon
 		}
 
 		// paint border
-		g.setColor( getBorderColor( c, selected ) );
+		g.setColor( getBorderColor( c, selected, indeterminate ) );
 		paintBorder( c, g, bw );
 
 		// paint background
-		Color bg = FlatUIUtils.deriveColor( getBackground( c, selected ),
-			selected ? selectedBackground : background );
+		Color baseBg = stateColor( indeterminate, indeterminateBackground, selected, selectedBackground, background );
+		Color bg = FlatUIUtils.deriveColor( getBackground( c, selected, indeterminate ), baseBg );
 		if( bg.getAlpha() < 255 ) {
 			// fill background with default color before filling with non-opaque background
-			g.setColor( selected ? selectedBackground : background );
+			g.setColor( baseBg );
 			paintBackground( c, g, bw );
 		}
 		g.setColor( bg );
@@ -211,7 +237,7 @@ public class FlatCheckBoxIcon
 
 		// paint checkmark
 		if( selected ) {
-			g.setColor( getCheckmarkColor( c ) );
+			g.setColor( getCheckmarkColor( c, indeterminate ) );
 			if( indeterminate )
 				paintIndeterminate( c, g );
 			else
@@ -272,30 +298,33 @@ public class FlatCheckBoxIcon
 		return focusColor;
 	}
 
-	protected Color getBorderColor( Component c, boolean selected ) {
+	/** @since 3.6 */
+	protected Color getBorderColor( Component c, boolean selected, boolean indeterminate ) {
 		return FlatButtonUI.buttonStateColor( c,
-			selected ? selectedBorderColor : borderColor,
-			(selected && disabledSelectedBorderColor != null) ? disabledSelectedBorderColor : disabledBorderColor,
-			(selected && focusedSelectedBorderColor != null) ? focusedSelectedBorderColor : focusedBorderColor,
-			(selected && hoverSelectedBorderColor != null) ? hoverSelectedBorderColor : hoverBorderColor,
-			(selected && pressedSelectedBorderColor != null) ? pressedSelectedBorderColor : pressedBorderColor );
+			stateColor( indeterminate, indeterminateBorderColor,         selected, selectedBorderColor,         borderColor ),
+			stateColor( indeterminate, disabledIndeterminateBorderColor, selected, disabledSelectedBorderColor, disabledBorderColor ),
+			stateColor( indeterminate, focusedIndeterminateBorderColor,  selected, focusedSelectedBorderColor,  focusedBorderColor ),
+			stateColor( indeterminate, hoverIndeterminateBorderColor,    selected, hoverSelectedBorderColor,    hoverBorderColor ),
+			stateColor( indeterminate, pressedIndeterminateBorderColor,  selected, pressedSelectedBorderColor,  pressedBorderColor ) );
 	}
 
-	protected Color getBackground( Component c, boolean selected ) {
+	/** @since 3.6 */
+	protected Color getBackground( Component c, boolean selected, boolean indeterminate ) {
 		return FlatButtonUI.buttonStateColor( c,
-			selected ? selectedBackground : background,
-			(selected && disabledSelectedBackground != null) ? disabledSelectedBackground : disabledBackground,
-			(selected && focusedSelectedBackground != null) ? focusedSelectedBackground : focusedBackground,
-			(selected && hoverSelectedBackground != null) ? hoverSelectedBackground : hoverBackground,
-			(selected && pressedSelectedBackground != null) ? pressedSelectedBackground : pressedBackground );
+			stateColor( indeterminate, indeterminateBackground,          selected, selectedBackground,          background ),
+			stateColor( indeterminate, disabledIndeterminateBackground,  selected, disabledSelectedBackground,  disabledBackground ),
+			stateColor( indeterminate, focusedIndeterminateBackground,   selected, focusedSelectedBackground,   focusedBackground ),
+			stateColor( indeterminate, hoverIndeterminateBackground,     selected, hoverSelectedBackground,     hoverBackground ),
+			stateColor( indeterminate, pressedIndeterminateBackground,   selected, pressedSelectedBackground,   pressedBackground ) );
 	}
 
-	protected Color getCheckmarkColor( Component c ) {
+	/** @since 3.6 */
+	protected Color getCheckmarkColor( Component c, boolean indeterminate ) {
 		return FlatButtonUI.buttonStateColor( c,
-			checkmarkColor,
-			disabledCheckmarkColor,
-			focusedCheckmarkColor,
-			hoverCheckmarkColor,
-			pressedCheckmarkColor );
+			stateColor( indeterminate, indeterminateCheckmarkColor, checkmarkColor ),
+			stateColor( indeterminate, disabledIndeterminateCheckmarkColor, disabledCheckmarkColor ),
+			stateColor( indeterminate, focusedIndeterminateCheckmarkColor, focusedCheckmarkColor ),
+			stateColor( indeterminate, hoverIndeterminateCheckmarkColor, hoverCheckmarkColor ),
+			stateColor( indeterminate, pressedIndeterminateCheckmarkColor, pressedCheckmarkColor ) );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatCheckBoxMenuItemIcon.java

@@ -21,12 +21,11 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.AbstractButton;
 import javax.swing.JMenuItem;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 
 /**
  * Icon for {@link javax.swing.JCheckBoxMenuItem}.
@@ -40,6 +39,7 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
  */
 public class FlatCheckBoxMenuItemIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Color checkmarkColor = UIManager.getColor( "CheckBoxMenuItem.icon.checkmarkColor" );
 	@Styleable protected Color disabledCheckmarkColor = UIManager.getColor( "CheckBoxMenuItem.icon.disabledCheckmarkColor" );
@@ -49,21 +49,6 @@ public class FlatCheckBoxMenuItemIcon
 		super( 15, 15, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g2 ) {
 		boolean selected = (c instanceof AbstractButton) && ((AbstractButton)c).isSelected();

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatClearIcon.java

@@ -21,12 +21,11 @@ import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.AbstractButton;
 import javax.swing.ButtonModel;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -41,6 +40,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  */
 public class FlatClearIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Color clearIconColor = UIManager.getColor( "SearchField.clearIconColor" );
 	@Styleable protected Color clearIconHoverColor = UIManager.getColor( "SearchField.clearIconHoverColor" );
@@ -58,21 +58,6 @@ public class FlatClearIcon
 		this.ignoreButtonState = ignoreButtonState;
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		if( !ignoreButtonState && c instanceof AbstractButton ) {

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatHelpButtonIcon.java

@@ -24,11 +24,10 @@ import java.awt.Graphics2D;
 import java.awt.RenderingHints;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -54,6 +53,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  */
 public class FlatHelpButtonIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected int focusWidth = UIManager.getInt( "Component.focusWidth" );
 	@Styleable protected Color focusColor = UIManager.getColor( "Component.focusColor" );
@@ -76,21 +76,6 @@ public class FlatHelpButtonIcon
 		super( 0, 0, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g2 ) {
 		/*

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatInternalFrameCloseIcon.java

@@ -53,8 +53,8 @@ public class FlatInternalFrameCloseIcon
 
 		g.setColor( FlatButtonUI.buttonStateColor( c, c.getForeground(), null, null, hoverForeground, pressedForeground ) );
 
-		float mx = width / 2;
-		float my = height / 2;
+		float mx = width / 2f;
+		float my = height / 2f;
 		float r = 3.25f;
 
 		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD, 4 );

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatMenuArrowIcon.java

@@ -21,12 +21,11 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.JMenu;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 
 /**
  * "arrow" icon for {@link javax.swing.JMenu}.
@@ -41,6 +40,7 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
  */
 public class FlatMenuArrowIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected String arrowType = UIManager.getString( "Component.arrowType" );
 	@Styleable protected Color arrowColor = UIManager.getColor( "Menu.icon.arrowColor" );
@@ -51,21 +51,6 @@ public class FlatMenuArrowIcon
 		super( 6, 10, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		if( c != null && !c.getComponentOrientation().isLeftToRight() )

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatSearchIcon.java

@@ -21,11 +21,10 @@ import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Area;
 import java.awt.geom.Ellipse2D;
-import java.util.Map;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -40,6 +39,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  */
 public class FlatSearchIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Color searchIconColor = UIManager.getColor( "SearchField.searchIconColor" );
 	@Styleable protected Color searchIconHoverColor = UIManager.getColor( "SearchField.searchIconHoverColor" );
@@ -58,21 +58,6 @@ public class FlatSearchIcon
 		this.ignoreButtonState = ignoreButtonState;
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatTabbedPaneCloseIcon.java

@@ -22,11 +22,10 @@ import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -48,6 +47,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  */
 public class FlatTabbedPaneCloseIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Dimension closeSize = UIManager.getDimension( "TabbedPane.closeSize" );
 	@Styleable protected int closeArc = UIManager.getInt( "TabbedPane.closeArc" );
@@ -65,21 +65,6 @@ public class FlatTabbedPaneCloseIcon
 		super( 16, 16, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		// paint background
@@ -90,12 +75,12 @@ public class FlatTabbedPaneCloseIcon
 				closeSize.width, closeSize.height, closeArc, closeArc );
 		}
 
-		// set cross color
+		// set color of cross
 		Color fg = FlatButtonUI.buttonStateColor( c, closeForeground, null, null, closeHoverForeground, closePressedForeground );
 		g.setColor( FlatUIUtils.deriveColor( fg, c.getForeground() ) );
 
-		float mx = width / 2;
-		float my = height / 2;
+		float mx = width / 2f;
+		float my = height / 2f;
 		float r = ((bg != null) ? closeCrossFilledSize : closeCrossPlainSize) / 2;
 
 		// paint cross

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatTreeOpenIcon.java

@@ -57,11 +57,11 @@ public class FlatTreeOpenIcon
 			double arc = 1.5;
 			double arc2 = 0.5;
 			path = FlatUIUtils.createPath( false,
-				// bottom-left of opend part
+				// bottom-left of opened part
 				2,13.5,
-				// top-left of opend part
+				// top-left of opened part
 				FlatUIUtils.ROUNDED, 4.5,7.5, arc,
-				// top-right of opend part
+				// top-right of opened part
 				FlatUIUtils.ROUNDED, 15.5,7.5, arc2,
 
 				// bottom-right

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowAbstractIcon.java

@@ -18,66 +18,141 @@ package com.formdev.flatlaf.icons;
 
 import java.awt.Color;
 import java.awt.Component;
+import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
-import java.awt.RenderingHints;
-import javax.swing.UIManager;
+import java.awt.Insets;
+import java.awt.Window;
+import javax.swing.SwingUtilities;
 import com.formdev.flatlaf.ui.FlatButtonUI;
+import com.formdev.flatlaf.ui.FlatTitlePane;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.DerivedColor;
 import com.formdev.flatlaf.util.HiDPIUtils;
+import com.formdev.flatlaf.util.UIScale;
 
 /**
  * Base class for window icons.
  *
  * @uiDefault TitlePane.buttonSize						Dimension
- * @uiDefault TitlePane.buttonHoverBackground			Color
- * @uiDefault TitlePane.buttonPressedBackground			Color
+ * @uiDefault TitlePane.buttonInsets					Insets	optional
+ * @uiDefault TitlePane.buttonArc						int		optional
+ * @uiDefault TitlePane.buttonSymbolHeight				int
+ * @uiDefault TitlePane.buttonBackground				Color	optional
+ * @uiDefault TitlePane.buttonForeground				Color	optional
+ * @uiDefault TitlePane.buttonInactiveBackground		Color	optional
+ * @uiDefault TitlePane.buttonInactiveForeground		Color	optional
+ * @uiDefault TitlePane.buttonHoverBackground			Color	optional
+ * @uiDefault TitlePane.buttonHoverForeground			Color	optional
+ * @uiDefault TitlePane.buttonPressedBackground			Color	optional
+ * @uiDefault TitlePane.buttonPressedForeground			Color	optional
  *
  * @author Karl Tauber
  */
 public abstract class FlatWindowAbstractIcon
 	extends FlatAbstractIcon
 {
-	private final Color hoverBackground;
-	private final Color pressedBackground;
+	/** @since 3.6 */ protected final Insets insets;
+	/** @since 3.6 */ protected final int arc;
+	/** @since 3.6 */ protected final int symbolHeight;
 
-	public FlatWindowAbstractIcon() {
-		this( UIManager.getDimension( "TitlePane.buttonSize" ),
-			UIManager.getColor( "TitlePane.buttonHoverBackground" ),
-			UIManager.getColor( "TitlePane.buttonPressedBackground" ) );
+	/** @since 3.6 */ protected final Color background;
+	/** @since 3.6 */ protected final Color foreground;
+	/** @since 3.6 */ protected final Color inactiveBackground;
+	/** @since 3.6 */ protected final Color inactiveForeground;
+	protected final Color hoverBackground;
+	/** @since 3.6 */ protected final Color hoverForeground;
+	protected final Color pressedBackground;
+	/** @since 3.6 */ protected final Color pressedForeground;
+
+	/** @since 3.2 */
+	protected FlatWindowAbstractIcon( String windowStyle ) {
+		this( windowStyle, null, null, null, null, null, null, null, null );
 	}
 
-	public FlatWindowAbstractIcon( Dimension size, Color hoverBackground, Color pressedBackground ) {
+	/** @since 3.6 */
+	protected FlatWindowAbstractIcon( String windowStyle,
+		Color background, Color foreground, Color inactiveBackground, Color inactiveForeground,
+		Color hoverBackground, Color hoverForeground, Color pressedBackground, Color pressedForeground )
+	{
+		this( FlatUIUtils.getSubUIDimension( "TitlePane.buttonSize", windowStyle ),
+			FlatUIUtils.getSubUIInsets( "TitlePane.buttonInsets", windowStyle ),
+			FlatUIUtils.getSubUIInt( "TitlePane.buttonArc", windowStyle, 0 ),
+			FlatUIUtils.getSubUIInt( "TitlePane.buttonSymbolHeight", windowStyle, 10 ),
+			(background != null) ? background : FlatUIUtils.getSubUIColor( "TitlePane.buttonBackground", windowStyle ),
+			(foreground != null) ? foreground : FlatUIUtils.getSubUIColor( "TitlePane.buttonForeground", windowStyle ),
+			(inactiveBackground != null) ? inactiveBackground : FlatUIUtils.getSubUIColor( "TitlePane.buttonInactiveBackground", windowStyle ),
+			(inactiveForeground != null) ? inactiveForeground : FlatUIUtils.getSubUIColor( "TitlePane.buttonInactiveForeground", windowStyle ),
+			(hoverBackground != null) ? hoverBackground : FlatUIUtils.getSubUIColor( "TitlePane.buttonHoverBackground", windowStyle ),
+			(hoverForeground != null) ? hoverForeground : FlatUIUtils.getSubUIColor( "TitlePane.buttonHoverForeground", windowStyle ),
+			(pressedBackground != null) ? pressedBackground : FlatUIUtils.getSubUIColor( "TitlePane.buttonPressedBackground", windowStyle ),
+			(pressedForeground != null) ? pressedForeground : FlatUIUtils.getSubUIColor( "TitlePane.buttonPressedForeground", windowStyle ) );
+	}
+
+	/** @since 3.6 */
+	protected FlatWindowAbstractIcon( Dimension size, Insets insets, int arc, int symbolHeight,
+		Color background, Color foreground, Color inactiveBackground, Color inactiveForeground,
+		Color hoverBackground, Color hoverForeground, Color pressedBackground, Color pressedForeground )
+	{
 		super( size.width, size.height, null );
+		this.insets = (insets != null) ? insets : new Insets( 0, 0, 0, 0 );
+		this.arc = arc;
+		this.symbolHeight = symbolHeight;
+
+		this.background = background;
+		this.foreground = foreground;
+		this.inactiveBackground = inactiveBackground;
+		this.inactiveForeground = inactiveForeground;
 		this.hoverBackground = hoverBackground;
+		this.hoverForeground = hoverForeground;
 		this.pressedBackground = pressedBackground;
+		this.pressedForeground = pressedForeground;
 	}
 
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
-		paintBackground( c, g );
-
 		g.setColor( getForeground( c ) );
 		HiDPIUtils.paintAtScale1x( g, 0, 0, width, height, this::paintIconAt1x );
 	}
 
 	protected abstract void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor );
 
-	protected void paintBackground( Component c, Graphics2D g ) {
-		Color background = FlatButtonUI.buttonStateColor( c, null, null, null, hoverBackground, pressedBackground );
+	/** @since 3.5.2 */
+	@Override
+	protected void paintBackground( Component c, Graphics2D g, int x, int y ) {
+		Color bg = null;
+		if( background != null || inactiveBackground != null ) {
+			Window window = SwingUtilities.windowForComponent( c );
+			bg = (window == null || window.isActive()) ? background : inactiveBackground;
+		}
+
+		Color background = FlatButtonUI.buttonStateColor( c, bg, null, null, hoverBackground, pressedBackground );
 		if( background != null ) {
-			// disable antialiasing for background rectangle painting to avoid blury edges when scaled (e.g. at 125% or 175%)
-			Object oldHint = g.getRenderingHint( RenderingHints.KEY_ANTIALIASING );
-			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF );
+			Insets insets = UIScale.scale( this.insets );
+			float arc = UIScale.scale( (float) this.arc );
 
-			g.setColor( FlatUIUtils.deriveColor( background, c.getBackground() ) );
-			g.fillRect( 0, 0, width, height );
+			// derive color from title pane background
+			if( background instanceof DerivedColor ) {
+				Container titlePane = SwingUtilities.getAncestorOfClass( FlatTitlePane.class, c );
+				Component baseComp = (titlePane != null) ? titlePane : c;
+				background = FlatUIUtils.deriveColor( background, baseComp.getBackground() );
+			}
 
-			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, oldHint );
+			g.setColor( background );
+			FlatUIUtils.paintComponentBackground( g, insets.left, insets.top,
+				c.getWidth() - insets.left - insets.right,
+				c.getHeight() - insets.top - insets.bottom,
+				0, arc );
 		}
 	}
 
 	protected Color getForeground( Component c ) {
-		return c.getForeground();
+		Color fg = null;
+		if( foreground != null || inactiveForeground != null ) {
+			Window window = SwingUtilities.windowForComponent( c );
+			fg = (window == null || window.isActive()) ? foreground : inactiveForeground;
+		}
+		return FlatButtonUI.buttonStateColor( c, (fg != null) ? fg : c.getForeground(),
+			null, null, hoverForeground, pressedForeground );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowCloseIcon.java

@@ -17,44 +17,54 @@
 package com.formdev.flatlaf.icons;
 
 import java.awt.BasicStroke;
-import java.awt.Color;
-import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatButtonUI;
+import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * "close" icon for windows (frames and dialogs).
  *
- * @uiDefault TitlePane.closeHoverBackground			Color
- * @uiDefault TitlePane.closePressedBackground			Color
- * @uiDefault TitlePane.closeHoverForeground			Color
- * @uiDefault TitlePane.closePressedForeground			Color
+ * @uiDefault TitlePane.closeBackground					Color	optional
+ * @uiDefault TitlePane.closeForeground					Color	optional
+ * @uiDefault TitlePane.closeInactiveBackground			Color	optional
+ * @uiDefault TitlePane.closeInactiveForeground			Color	optional
+ * @uiDefault TitlePane.closeHoverBackground			Color	optional
+ * @uiDefault TitlePane.closeHoverForeground			Color	optional
+ * @uiDefault TitlePane.closePressedBackground			Color	optional
+ * @uiDefault TitlePane.closePressedForeground			Color	optional
  *
  * @author Karl Tauber
  */
 public class FlatWindowCloseIcon
 	extends FlatWindowAbstractIcon
 {
-	private final Color hoverForeground = UIManager.getColor( "TitlePane.closeHoverForeground" );
-	private final Color pressedForeground = UIManager.getColor( "TitlePane.closePressedForeground" );
-
 	public FlatWindowCloseIcon() {
-		super( UIManager.getDimension( "TitlePane.buttonSize" ),
-			UIManager.getColor( "TitlePane.closeHoverBackground" ),
-			UIManager.getColor( "TitlePane.closePressedBackground" ) );
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowCloseIcon( String windowStyle ) {
+		super( windowStyle,
+			FlatUIUtils.getSubUIColor( "TitlePane.closeBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeForeground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeInactiveBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeInactiveForeground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeHoverBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeHoverForeground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closePressedBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closePressedForeground", windowStyle ) );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (10 * scaleFactor);
+		int iwh = (int) (symbolHeight * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
 		int ix2 = ix + iwh - 1;
 		int iy2 = iy + iwh - 1;
-		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		boolean isWindows10 = SystemInfo.isWindows_10_orLater && !SystemInfo.isWindows_11_orLater;
+		float thickness = Math.max( isWindows10 ? (int) scaleFactor : (float) scaleFactor, 1 );
 
 		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD, 4 );
 		path.moveTo( ix, iy );
@@ -64,9 +74,4 @@ public class FlatWindowCloseIcon
 		g.setStroke( new BasicStroke( thickness ) );
 		g.draw( path );
 	}
-
-	@Override
-	protected Color getForeground( Component c ) {
-		return FlatButtonUI.buttonStateColor( c, c.getForeground(), null, null, hoverForeground, pressedForeground );
-	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowIconifyIcon.java

@@ -27,12 +27,18 @@ public class FlatWindowIconifyIcon
 	extends FlatWindowAbstractIcon
 {
 	public FlatWindowIconifyIcon() {
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowIconifyIcon( String windowStyle ) {
+		super( windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iw = (int) (10 * scaleFactor);
-		int ih = (int) scaleFactor;
+		int iw = (int) (symbolHeight * scaleFactor);
+		int ih = Math.max( (int) scaleFactor, 1 );
 		int ix = x + ((width - iw) / 2);
 		int iy = y + ((height - ih) / 2);
 

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowMaximizeIcon.java

@@ -29,14 +29,21 @@ public class FlatWindowMaximizeIcon
 	extends FlatWindowAbstractIcon
 {
 	public FlatWindowMaximizeIcon() {
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowMaximizeIcon( String windowStyle ) {
+		super( windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (10 * scaleFactor);
+		int iwh = (int) (symbolHeight * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
-		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		boolean isWindows10 = SystemInfo.isWindows_10_orLater && !SystemInfo.isWindows_11_orLater;
+		float thickness = Math.max( isWindows10 ? (int) scaleFactor : (float) scaleFactor, 1 );
 		int arc = Math.max( (int) (1.5 * scaleFactor), 2 );
 
 		g.fill( SystemInfo.isWindows_11_orLater

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowRestoreIcon.java

@@ -32,18 +32,25 @@ public class FlatWindowRestoreIcon
 	extends FlatWindowAbstractIcon
 {
 	public FlatWindowRestoreIcon() {
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowRestoreIcon( String windowStyle ) {
+		super( windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (10 * scaleFactor);
+		int iwh = (int) (symbolHeight * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
-		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		boolean isWindows10 = SystemInfo.isWindows_10_orLater && !SystemInfo.isWindows_11_orLater;
+		float thickness = Math.max( isWindows10 ? (int) scaleFactor : (float) scaleFactor, 1 );
 		int arc = Math.max( (int) (1.5 * scaleFactor), 2 );
 		int arcOuter = (int) (arc + (1.5 * scaleFactor));
 
-		int rwh = (int) (8 * scaleFactor);
+		int rwh = (int) ((symbolHeight - 2) * scaleFactor);
 		int ro2 = iwh - rwh;
 
 		// upper-right rectangle

flatlaf-core/src/main/java/com/formdev/flatlaf/json/JsonParser.java

@@ -502,9 +502,9 @@ class JsonParser {
   }
 
   private boolean isHexDigit() {
-    return current >= '0' && current <= '9'
-        || current >= 'a' && current <= 'f'
-        || current >= 'A' && current <= 'F';
+    return (current >= '0' && current <= '9')
+        || (current >= 'a' && current <= 'f')
+        || (current >= 'A' && current <= 'F');
   }
 
   private boolean isEndOfText() {

flatlaf-core/src/main/java/com/formdev/flatlaf/json/Location.java

@@ -69,7 +69,7 @@ public class Location {
     if (obj == null) {
       return false;
     }
-    if (getClass() != obj.getClass()) {
+    if (!(obj instanceof Location)) {
       return false;
     }
     Location other = (Location)obj;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatBorder.java

@@ -23,17 +23,15 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Paint;
-import java.util.Map;
 import javax.swing.JComboBox;
 import javax.swing.JComponent;
 import javax.swing.JScrollPane;
 import javax.swing.JSpinner;
-import javax.swing.JViewport;
 import javax.swing.UIManager;
 import javax.swing.plaf.basic.BasicBorders;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
-import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableBorder;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.util.DerivedColor;
 
 /**
@@ -60,13 +58,15 @@ import com.formdev.flatlaf.util.DerivedColor;
  * @uiDefault Component.error.focusedBorderColor		Color
  * @uiDefault Component.warning.borderColor				Color
  * @uiDefault Component.warning.focusedBorderColor		Color
+ * @uiDefault Component.success.borderColor				Color
+ * @uiDefault Component.success.focusedBorderColor		Color
  * @uiDefault Component.custom.borderColor				Color
  *
  * @author Karl Tauber
  */
 public class FlatBorder
 	extends BasicBorders.MarginBorder
-	implements StyleableBorder
+	implements StyleableObject
 {
 	@Styleable protected int focusWidth = UIManager.getInt( "Component.focusWidth" );
 	@Styleable protected float innerFocusWidth = FlatUIUtils.getUIFloat( "Component.innerFocusWidth", 0 );
@@ -82,6 +82,8 @@ public class FlatBorder
 	@Styleable(dot=true) protected Color errorFocusedBorderColor = UIManager.getColor( "Component.error.focusedBorderColor" );
 	@Styleable(dot=true) protected Color warningBorderColor = UIManager.getColor( "Component.warning.borderColor" );
 	@Styleable(dot=true) protected Color warningFocusedBorderColor = UIManager.getColor( "Component.warning.focusedBorderColor" );
+	/** @since 3.6 */ @Styleable(dot=true) protected Color successBorderColor = UIManager.getColor( "Component.success.borderColor" );
+	/** @since 3.6 */ @Styleable(dot=true) protected Color successFocusedBorderColor = UIManager.getColor( "Component.success.focusedBorderColor" );
 	@Styleable(dot=true) protected Color customBorderColor = UIManager.getColor( "Component.custom.borderColor" );
 
 	// only used via styling (not in UI defaults, but has likewise client properties)
@@ -89,24 +91,6 @@ public class FlatBorder
 	/** @since 2 */ @Styleable protected Color outlineColor;
 	/** @since 2 */ @Styleable protected Color outlineFocusedColor;
 
-	/** @since 2 */
-	@Override
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	@Override
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	@Override
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		Graphics2D g2 = (Graphics2D) g.create();
@@ -136,7 +120,7 @@ public class FlatBorder
 			Paint borderColor = (outlineColor != null) ? outlineColor : getBorderColor( c );
 			FlatUIUtils.paintOutlinedComponent( g2, x, y, width, height,
 				focusWidth, 1, focusInnerWidth, borderWidth, arc,
-				focusColor, borderColor, null );
+				focusColor, borderColor, null, c instanceof JScrollPane );
 		} finally {
 			g2.dispose();
 		}
@@ -169,6 +153,9 @@ public class FlatBorder
 
 				case FlatClientProperties.OUTLINE_WARNING:
 					return isFocused( c ) ? warningFocusedBorderColor : warningBorderColor;
+
+				case FlatClientProperties.OUTLINE_SUCCESS:
+					return isFocused( c ) ? successFocusedBorderColor : successBorderColor;
 			}
 		} else if( outline instanceof Color ) {
 			Color color = (Color) outline;
@@ -195,8 +182,7 @@ public class FlatBorder
 	protected boolean isEnabled( Component c ) {
 		if( c instanceof JScrollPane ) {
 			// check whether view component is disabled
-			JViewport viewport = ((JScrollPane)c).getViewport();
-			Component view = (viewport != null) ? viewport.getView() : null;
+			Component view = FlatScrollPaneUI.getView( (JScrollPane) c );
 			if( view != null && !isEnabled( view ) )
 				return false;
 		}
@@ -279,7 +265,7 @@ public class FlatBorder
 	}
 
 	/**
-	 * Returns the (unscaled) arc diameter of the border.
+	 * Returns the (unscaled) arc diameter of the border corners.
 	 */
 	protected int getArc( Component c ) {
 		return 0;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatButtonBorder.java

@@ -42,6 +42,13 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.disabledBorderColor		Color
  * @uiDefault Button.focusedBorderColor			Color
  * @uiDefault Button.hoverBorderColor			Color	optional
+ * @uiDefault Button.pressedBorderColor			Color	optional
+ *
+ * @uiDefault Button.selectedBorderColor		Color	optional
+ * @uiDefault Button.disabledSelectedBorderColor Color	optional
+ * @uiDefault Button.focusedSelectedBorderColor	Color	optional
+ * @uiDefault Button.hoverSelectedBorderColor	Color	optional
+ * @uiDefault Button.pressedSelectedBorderColor	Color	optional
  *
  * @uiDefault Button.default.borderWidth		int or float
  * @uiDefault Button.default.borderColor		Color
@@ -49,6 +56,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.default.endBorderColor		Color	optional; if set, a gradient paint is used
  * @uiDefault Button.default.focusedBorderColor	Color
  * @uiDefault Button.default.focusColor			Color
+ * @uiDefault Button.default.pressedBorderColor	Color	optional
  * @uiDefault Button.default.hoverBorderColor	Color	optional
  *
  * @uiDefault Button.toolbar.focusWidth			int or float		optional; default is 1.5
@@ -65,6 +73,13 @@ public class FlatButtonBorder
 
 	protected Color endBorderColor = UIManager.getColor( "Button.endBorderColor" );
 	@Styleable protected Color hoverBorderColor = UIManager.getColor( "Button.hoverBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color pressedBorderColor = UIManager.getColor( "Button.pressedBorderColor" );
+
+	/** @since 3.5 */ @Styleable protected Color selectedBorderColor = UIManager.getColor( "Button.selectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color disabledSelectedBorderColor = UIManager.getColor( "Button.disabledSelectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color focusedSelectedBorderColor = UIManager.getColor( "Button.focusedSelectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color hoverSelectedBorderColor = UIManager.getColor( "Button.hoverSelectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color pressedSelectedBorderColor = UIManager.getColor( "Button.pressedSelectedBorderColor" );
 
 	@Styleable(dot=true) protected float defaultBorderWidth = FlatUIUtils.getUIFloat( "Button.default.borderWidth", 1 );
 	@Styleable(dot=true) protected Color defaultBorderColor = FlatUIUtils.getUIColor( "Button.default.startBorderColor", "Button.default.borderColor" );
@@ -72,6 +87,7 @@ public class FlatButtonBorder
 	@Styleable(dot=true) protected Color defaultFocusedBorderColor = UIManager.getColor( "Button.default.focusedBorderColor" );
 	@Styleable(dot=true) protected Color defaultFocusColor = UIManager.getColor( "Button.default.focusColor" );
 	@Styleable(dot=true) protected Color defaultHoverBorderColor = UIManager.getColor( "Button.default.hoverBorderColor" );
+	/** @since 3.5 */ @Styleable(dot=true) protected Color defaultPressedBorderColor = UIManager.getColor( "Button.default.pressedBorderColor" );
 
 	/** @since 1.4 */ @Styleable(dot=true) protected float toolbarFocusWidth = FlatUIUtils.getUIFloat( "Button.toolbar.focusWidth", 1.5f );
 	/** @since 1.4 */ @Styleable(dot=true) protected Color toolbarFocusColor = UIManager.getColor( "Button.toolbar.focusColor" );
@@ -139,12 +155,13 @@ public class FlatButtonBorder
 	@Override
 	protected Paint getBorderColor( Component c ) {
 		boolean def = FlatButtonUI.isDefaultButton( c );
+		boolean selected = (c instanceof AbstractButton && ((AbstractButton)c).isSelected());
 		Paint color = FlatButtonUI.buttonStateColor( c,
-			def ? defaultBorderColor : borderColor,
-			disabledBorderColor,
-			def ? defaultFocusedBorderColor : focusedBorderColor,
-			def ? defaultHoverBorderColor : hoverBorderColor,
-			null );
+			def ? defaultBorderColor : ((selected && selectedBorderColor != null) ? selectedBorderColor : borderColor),
+			(selected && disabledSelectedBorderColor != null) ? disabledSelectedBorderColor : disabledBorderColor,
+			def ? defaultFocusedBorderColor : ((selected && focusedSelectedBorderColor != null) ? focusedSelectedBorderColor : focusedBorderColor),
+			def ? defaultHoverBorderColor : ((selected && hoverSelectedBorderColor != null) ? hoverSelectedBorderColor : hoverBorderColor),
+			def ? defaultPressedBorderColor : ((selected && pressedSelectedBorderColor != null) ? pressedSelectedBorderColor : pressedBorderColor) );
 
 		// change to gradient paint if start/end colors are specified
 		Color startBg = def ? defaultBorderColor : borderColor;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatButtonUI.java

@@ -29,6 +29,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Rectangle;
+import java.awt.event.FocusEvent;
 import java.awt.geom.RoundRectangle2D;
 import java.beans.PropertyChangeEvent;
 import java.util.Map;
@@ -53,12 +54,15 @@ import javax.swing.plaf.ToolBarUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicButtonListener;
 import javax.swing.plaf.basic.BasicButtonUI;
+import javax.swing.plaf.basic.BasicHTML;
+import javax.swing.text.View;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
-import com.formdev.flatlaf.icons.FlatHelpButtonIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -276,8 +280,6 @@ public class FlatButtonUI
 
 		LookAndFeel.installProperty( b, "opaque", false );
 		LookAndFeel.installProperty( b, "iconTextGap", scale( iconTextGap ) );
-
-		MigLayoutVisualPadding.install( b );
 	}
 
 	@Override
@@ -287,10 +289,23 @@ public class FlatButtonUI
 		oldStyleValues = null;
 		borderShared = null;
 
-		MigLayoutVisualPadding.uninstall( b );
 		defaults_initialized = false;
 	}
 
+	@Override
+	protected void installListeners( AbstractButton b ) {
+		super.installListeners( b );
+
+		MigLayoutVisualPadding.install( b );
+	}
+
+	@Override
+	protected void uninstallListeners( AbstractButton b ) {
+		super.uninstallListeners( b );
+
+		MigLayoutVisualPadding.uninstall( b );
+	}
+
 	@Override
 	protected BasicButtonListener createButtonListener( AbstractButton b ) {
 		return new FlatButtonListener( b );
@@ -298,6 +313,10 @@ public class FlatButtonUI
 
 	protected void propertyChange( AbstractButton b, PropertyChangeEvent e ) {
 		switch( e.getPropertyName() ) {
+			case BasicHTML.propertyKey:
+				FlatHTML.updateRendererCSSFontBaseSize( b );
+				break;
+
 			case SQUARE_SIZE:
 			case MINIMUM_WIDTH:
 			case MINIMUM_HEIGHT:
@@ -306,11 +325,11 @@ public class FlatButtonUI
 
 			case BUTTON_TYPE:
 				b.revalidate();
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 
 			case OUTLINE:
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 
 			case STYLE:
@@ -322,7 +341,7 @@ public class FlatButtonUI
 				} else
 					installStyle( b );
 				b.revalidate();
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 		}
 	}
@@ -350,8 +369,8 @@ public class FlatButtonUI
 	/** @since 2 */
 	protected Object applyStyleProperty( AbstractButton b, String key, Object value ) {
 		if( key.startsWith( "help." ) ) {
-			if( !(helpButtonIcon instanceof FlatHelpButtonIcon) )
-				return new UnknownStyleException( key );
+			if( !(helpButtonIcon instanceof StyleableObject) )
+				throw new UnknownStyleException( key );
 
 			if( helpButtonIconShared ) {
 				helpButtonIcon = FlatStylingSupport.cloneIcon( helpButtonIcon );
@@ -359,9 +378,18 @@ public class FlatButtonUI
 			}
 
 			key = key.substring( "help.".length() );
-			return ((FlatHelpButtonIcon)helpButtonIcon).applyStyleProperty( key, value );
+			return ((StyleableObject)helpButtonIcon).applyStyleProperty( key, value );
 		}
 
+		// update internal values; otherwise isCustomBackground() and isCustomForeground() would return wrong results
+		switch( key ) {
+			case "background":	background = (Color) value; break;
+			case "foreground":	foreground = (Color) value; break;
+		}
+
+		if( "iconTextGap".equals( key ) && value instanceof Integer )
+			value = UIScale.scale( (Integer) value );
+
 		if( borderShared == null )
 			borderShared = new AtomicBoolean( true );
 		return FlatStylingSupport.applyToAnnotatedObjectOrBorder( this, key, value, b, borderShared );
@@ -371,8 +399,8 @@ public class FlatButtonUI
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
 		Map<String, Class<?>> infos = FlatStylingSupport.getAnnotatedStyleableInfos( this, c.getBorder() );
-		if( helpButtonIcon instanceof FlatHelpButtonIcon )
-			FlatStylingSupport.putAllPrefixKey( infos, "help.", ((FlatHelpButtonIcon)helpButtonIcon).getStyleableInfos() );
+		if( helpButtonIcon instanceof StyleableObject )
+			FlatStylingSupport.putAllPrefixKey( infos, "help.", ((StyleableObject)helpButtonIcon).getStyleableInfos() );
 		return infos;
 	}
 
@@ -380,8 +408,8 @@ public class FlatButtonUI
 	@Override
 	public Object getStyleableValue( JComponent c, String key ) {
 		if( key.startsWith( "help." ) ) {
-			return (helpButtonIcon instanceof FlatHelpButtonIcon)
-				? ((FlatHelpButtonIcon)helpButtonIcon).getStyleableValue( key.substring( "help.".length() ) )
+			return (helpButtonIcon instanceof StyleableObject)
+				? ((StyleableObject)helpButtonIcon).getStyleableValue( key.substring( "help.".length() ) )
 				: null;
 		}
 
@@ -548,9 +576,52 @@ public class FlatButtonUI
 		}
 	}
 
+	/**
+	 * Similar to BasicButtonUI.paint(), but does not use zero insets for HTML text,
+	 * which is done in BasicButtonUI.layout() since Java 19.
+	 * See https://github.com/openjdk/jdk/pull/8407
+	 * and https://github.com/openjdk/jdk/pull/8407#issuecomment-1761583430
+	 */
 	@Override
 	public void paint( Graphics g, JComponent c ) {
-		super.paint( FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c ), c );
+		g = FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c );
+
+		AbstractButton b = (AbstractButton) c;
+
+		// layout
+		String clippedText = layout( b, b.getFontMetrics( b.getFont() ), b.getWidth(), b.getHeight() );
+
+		// not used in FlatLaf, but invoked for compatibility with BasicButtonUI.paint()
+		clearTextShiftOffset();
+
+		// not used in FlatLaf, but invoked for compatibility with BasicButtonUI.paint()
+		ButtonModel model = b.getModel();
+		if( model.isArmed() && model.isPressed() )
+			paintButtonPressed( g, b );
+
+		// paint icon
+		if( b.getIcon() != null )
+			paintIcon( g, b, iconR );
+
+		// paint text
+		if( clippedText != null && !clippedText.isEmpty() ) {
+			View view = (View) b.getClientProperty( BasicHTML.propertyKey );
+			if( view != null ) {
+				// update foreground color in HTML view, which is necessary
+				// for selected and pressed states
+				// (only for enabled buttons, because UIManager.getColor("textInactiveText")
+				// is used for disabled components; see: javax.swing.text.GlyphView.paint())
+				if( b.isEnabled() )
+					FlatHTML.updateRendererCSSForeground( view, getForeground( b ) );
+
+				view.paint( g, textR ); // HTML text
+			} else
+				paintText( g, b, textR, clippedText );
+		}
+
+		// not used in FlatLaf, but invoked for compatibility with BasicButtonUI.paint()
+		if( b.isFocusPainted() && b.hasFocus() )
+			paintFocus( g, b, viewR, textR, iconR );
 	}
 
 	@Override
@@ -590,8 +661,6 @@ public class FlatButtonUI
 	}
 
 	public static void paintText( Graphics g, AbstractButton b, Rectangle textRect, String text, Color foreground ) {
-		if(foreground == null)
-			foreground=Color.red;
 		FontMetrics fm = b.getFontMetrics( b.getFont() );
 		int mnemonicIndex = FlatLaf.isShowMnemonics() ? b.getDisplayedMnemonicIndex() : -1;
 
@@ -601,7 +670,8 @@ public class FlatButtonUI
 	}
 
 	protected Color getBackground( JComponent c ) {
-		boolean toolBarButton = isToolBarButton( c ) || isBorderlessButton( c );
+		boolean def = isDefaultButton( c );
+		boolean toolBarButton = !def && (isToolBarButton( c ) || isBorderlessButton( c ));
 
 		// selected state
 		if( ((AbstractButton)c).isSelected() ) {
@@ -629,7 +699,6 @@ public class FlatButtonUI
 				toolbarPressedBackground );
 		}
 
-		boolean def = isDefaultButton( c );
 		return buttonStateColor( c,
 			getBackgroundBase( c, def ),
 			disabledBackground,
@@ -680,14 +749,16 @@ public class FlatButtonUI
 	}
 
 	protected Color getForeground( JComponent c ) {
-		boolean toolBarButton = isToolBarButton( c ) || isBorderlessButton( c );
+		Color fg = c.getForeground();
+		boolean def = isDefaultButton( c );
+		boolean toolBarButton = !def && (isToolBarButton( c ) || isBorderlessButton( c ));
 
 		// selected state
 		if( ((AbstractButton)c).isSelected() ) {
 			return buttonStateColor( c,
 				toolBarButton
-					? (toolbarSelectedForeground != null ? toolbarSelectedForeground : c.getForeground())
-					: selectedForeground,
+					? (toolbarSelectedForeground != null ? toolbarSelectedForeground : fg)
+					: (isCustomForeground( fg ) ? fg : selectedForeground),
 				toolBarButton
 					? (toolbarDisabledSelectedForeground != null ? toolbarDisabledSelectedForeground : disabledText)
 					: (disabledSelectedForeground != null ? disabledSelectedForeground : disabledText),
@@ -699,18 +770,17 @@ public class FlatButtonUI
 		// toolbar button
 		if( toolBarButton ) {
 			return buttonStateColor( c,
-				c.getForeground(),
+				fg,
 				disabledText,
 				null,
 				toolbarHoverForeground,
 				toolbarPressedForeground );
 		}
 
-		boolean def = isDefaultButton( c );
 		return buttonStateColor( c,
 			getForegroundBase( c, def ),
 			disabledText,
-			isCustomForeground( c.getForeground() ) ? null : (def ? defaultFocusedForeground : focusedForeground),
+			isCustomForeground( fg ) ? null : (def ? defaultFocusedForeground : focusedForeground),
 			def ? defaultHoverForeground : hoverForeground,
 			def ? defaultPressedForeground : pressedForeground );
 	}
@@ -783,6 +853,67 @@ public class FlatButtonUI
 		return margin instanceof UIResource && Objects.equals( margin, defaultMargin );
 	}
 
+	@Override
+	public int getBaseline( JComponent c, int width, int height ) {
+		return getBaselineImpl( c, width, height );
+	}
+
+	/**
+	 * Similar to BasicButtonUI.getBaseline(), but does not use zero insets for HTML text,
+	 * which is done in BasicButtonUI.layout() since Java 19.
+	 * See https://github.com/openjdk/jdk/pull/8407
+	 * and https://github.com/openjdk/jdk/pull/8407#issuecomment-1761583430
+	 */
+	static int getBaselineImpl( JComponent c, int width, int height ) {
+		if( width < 0 || height < 0 )
+			throw new IllegalArgumentException();
+
+		AbstractButton b = (AbstractButton) c;
+		String text = b.getText();
+		if( text == null || text.isEmpty() )
+			return -1;
+
+		FontMetrics fm = b.getFontMetrics( b.getFont() );
+		layout( b, fm, width, height );
+
+		View view = (View) b.getClientProperty( BasicHTML.propertyKey );
+		if( view != null ) {
+			// HTML text
+			int baseline = BasicHTML.getHTMLBaseline( view, textR.width, textR.height );
+			return (baseline >= 0) ? textR.y + baseline : baseline;
+		} else
+			return textR.y + fm.getAscent();
+	}
+
+	/**
+	 * Similar to BasicButtonUI.layout(), but does not use zero insets for HTML text,
+	 * which is done in BasicButtonUI.layout() since Java 19.
+	 * See https://github.com/openjdk/jdk/pull/8407
+	 * and https://github.com/openjdk/jdk/pull/8407#issuecomment-1761583430
+	 */
+	private static String layout( AbstractButton b, FontMetrics fm, int width, int height ) {
+		// compute view rectangle
+		Insets insets = b.getInsets();
+		viewR.setBounds( insets.left, insets.top,
+			width - insets.left - insets.right,
+			height - insets.top - insets.bottom );
+
+		// reset rectangles
+		textR.setBounds( 0, 0, 0, 0 );
+		iconR.setBounds( 0, 0, 0, 0 );
+
+		String text = b.getText();
+		return SwingUtilities.layoutCompoundLabel( b, fm, text, b.getIcon(),
+			b.getVerticalAlignment(), b.getHorizontalAlignment(),
+			b.getVerticalTextPosition(), b.getHorizontalTextPosition(),
+			viewR, iconR, textR,
+			(text != null) ? b.getIconTextGap() : 0 );
+	}
+
+	private static Rectangle viewR = new Rectangle();
+	private static Rectangle textR = new Rectangle();
+	private static Rectangle iconR = new Rectangle();
+
 	//---- class FlatButtonListener -------------------------------------------
 
 	protected class FlatButtonListener
@@ -803,7 +934,7 @@ public class FlatButtonUI
 
 		@Override
 		public void stateChanged( ChangeEvent e ) {
-			super.stateChanged( e );
+			HiDPIUtils.repaint( b );
 
 			// if button is in toolbar, repaint button groups
 			AbstractButton b = (AbstractButton) e.getSource();
@@ -815,5 +946,17 @@ public class FlatButtonUI
 					((FlatToolBarUI)ui).repaintButtonGroup( b );
 			}
 		}
+
+		@Override
+		public void focusGained( FocusEvent e ) {
+			super.focusGained( e );
+			HiDPIUtils.repaint( b );
+		}
+
+		@Override
+		public void focusLost( FocusEvent e ) {
+			super.focusLost( e );
+			HiDPIUtils.repaint( b );
+		}
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatCaret.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import static com.formdev.flatlaf.FlatClientProperties.*;
+import java.awt.Container;
 import java.awt.EventQueue;
 import java.awt.Rectangle;
 import java.awt.event.ActionEvent;
@@ -24,7 +25,9 @@ import java.awt.event.FocusEvent;
 import java.awt.event.MouseEvent;
 import javax.swing.Action;
 import javax.swing.ActionMap;
+import javax.swing.JComboBox;
 import javax.swing.JFormattedTextField;
+import javax.swing.JSpinner;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.UIResource;
@@ -33,6 +36,7 @@ import javax.swing.text.DefaultCaret;
 import javax.swing.text.DefaultEditorKit;
 import javax.swing.text.Document;
 import javax.swing.text.JTextComponent;
+import javax.swing.text.Position;
 import javax.swing.text.Utilities;
 
 /**
@@ -48,12 +52,15 @@ public class FlatCaret
 {
 	private static final String KEY_CARET_INFO = "FlatLaf.internal.caretInfo";
 
+	// selectAllOnFocusPolicy
+	private static final int NEVER = 0, ONCE = 1, ALWAYS = 2;
+
 	private final String selectAllOnFocusPolicy;
 	private final boolean selectAllOnMouseClick;
 
 	private boolean inInstall;
 	private boolean wasFocused;
-	private boolean wasTemporaryLost;
+	private boolean wasFocusTemporaryLost;
 	private boolean isMousePressed;
 	private boolean isWordSelection;
 	private boolean isLineSelection;
@@ -94,6 +101,9 @@ public class FlatCaret
 			// restore selection
 			select( (int) ci[1], (int) ci[0] );
 
+			if( ci[4] != 0 )
+				wasFocused = true;
+
 			// if text component is focused, then caret and selection are visible,
 			// but when switching theme, the component does not yet have
 			// a highlighter and the selection is not painted
@@ -121,6 +131,7 @@ public class FlatCaret
 			getMark(),
 			getBlinkRate(),
 			System.currentTimeMillis(),
+			wasFocused ? 1 : 0,
 		} );
 
 		super.deinstall( c );
@@ -140,11 +151,36 @@ public class FlatCaret
 		super.adjustVisibility( nloc );
 	}
 
+	@Override
+	public void setDot( int dot ) {
+		super.setDot( dot );
+
+		// mark as focused if invoked from JTextComponent.setCaretPosition()
+		// to disable SELECT_ALL_ON_FOCUS_POLICY_ONCE if application explicitly changes selection
+		if( !wasFocused &&
+			getSelectAllOnFocusPolicy() == ONCE &&
+			StackUtils.wasInvokedFrom( JTextComponent.class.getName(), "setCaretPosition", 6 ) )
+		  wasFocused = true;
+	}
+
+	@Override
+	public void moveDot( int dot ) {
+		super.moveDot( dot );
+
+		// mark as focused if invoked from JTextComponent.moveCaretPosition()
+		// to disable SELECT_ALL_ON_FOCUS_POLICY_ONCE if application explicitly changes selection
+		if( !wasFocused &&
+			getSelectAllOnFocusPolicy() == ONCE &&
+			StackUtils.wasInvokedFrom( JTextComponent.class.getName(), "moveCaretPosition", 6 ) )
+		  wasFocused = true;
+	}
+
 	@Override
 	public void focusGained( FocusEvent e ) {
-		if( !inInstall && !wasTemporaryLost && (!isMousePressed || selectAllOnMouseClick) )
+		if( !inInstall && !wasFocusTemporaryLost && (!isMousePressed || isSelectAllOnMouseClick()) )
 			selectAllOnFocusGained();
-		wasTemporaryLost = false;
+
+		wasFocusTemporaryLost = false;
 		wasFocused = true;
 
 		super.focusGained( e );
@@ -152,7 +188,7 @@ public class FlatCaret
 
 	@Override
 	public void focusLost( FocusEvent e ) {
-		wasTemporaryLost = e.isTemporary();
+		wasFocusTemporaryLost = e.isTemporary();
 		super.focusLost( e );
 	}
 
@@ -232,45 +268,73 @@ public class FlatCaret
 		if( doc == null || !c.isEnabled() || !c.isEditable() || FlatUIUtils.isCellEditor( c ) )
 			return;
 
-		Object selectAllOnFocusPolicy = c.getClientProperty( SELECT_ALL_ON_FOCUS_POLICY );
-		if( selectAllOnFocusPolicy == null )
-			selectAllOnFocusPolicy = this.selectAllOnFocusPolicy;
-
-		if( selectAllOnFocusPolicy == null || SELECT_ALL_ON_FOCUS_POLICY_NEVER.equals( selectAllOnFocusPolicy ) )
+		int selectAllOnFocusPolicy = getSelectAllOnFocusPolicy();
+		if( selectAllOnFocusPolicy == NEVER )
 			return;
 
-		if( !SELECT_ALL_ON_FOCUS_POLICY_ALWAYS.equals( selectAllOnFocusPolicy ) ) {
-			// policy is "once" (or null or unknown)
-
+		if( selectAllOnFocusPolicy == ONCE && !isMousePressed ) {
 			// was already focused?
-			if( wasFocused )
-				return;
-
-			// check whether selection was modified before gaining focus
-			int dot = getDot();
-			int mark = getMark();
-			if( dot != mark || dot != doc.getLength() )
+			if( wasFocused && !(c instanceof JFormattedTextField) )
 				return;
 		}
 
 		// select all
 		if( c instanceof JFormattedTextField ) {
 			EventQueue.invokeLater( () -> {
-				if( getComponent() == null )
+				// Warning: do not use variables from outside of this runnable
+				//          because they may be out-of-date when this runnable is executed
+
+				JTextComponent c2 = getComponent();
+				if( c2 == null )
 					return; // was deinstalled
 
-				select( 0, doc.getLength() );
+				select( 0, c2.getDocument().getLength() );
 			} );
-		} else {
+		} else
 			select( 0, doc.getLength() );
-		}
 	}
 
 	private void select( int mark, int dot ) {
 		if( mark != getMark() )
-			setDot( mark );
+			setDot( mark, Position.Bias.Forward );
 		if( dot != getDot() )
-			moveDot( dot );
+			moveDot( dot, Position.Bias.Forward );
+	}
+
+	private int getSelectAllOnFocusPolicy() {
+		Object value = getClientProperty( SELECT_ALL_ON_FOCUS_POLICY );
+		// Note: using String.valueOf() because selectAllOnFocusPolicy may be null
+		switch( String.valueOf( value instanceof String ? value : selectAllOnFocusPolicy ) ) {
+			default:
+			case SELECT_ALL_ON_FOCUS_POLICY_NEVER:  return NEVER;
+			case SELECT_ALL_ON_FOCUS_POLICY_ONCE:   return ONCE;
+			case SELECT_ALL_ON_FOCUS_POLICY_ALWAYS: return ALWAYS;
+		}
+	}
+
+	private boolean isSelectAllOnMouseClick() {
+		Object value = getClientProperty( SELECT_ALL_ON_MOUSE_CLICK );
+		return (value instanceof Boolean) ? (boolean) value : selectAllOnMouseClick;
+	}
+
+	private Object getClientProperty( String key ) {
+		JTextComponent c = getComponent();
+		if( c == null )
+			return null;
+
+		Object value = c.getClientProperty( key );
+		if( value != null )
+			return value;
+
+		Container parent = c.getParent();
+		if( parent instanceof JComboBox )
+			return ((JComboBox<?>)parent).getClientProperty( key );
+		if( parent instanceof JSpinner.DefaultEditor ) {
+			parent = parent.getParent();
+			if( parent instanceof JSpinner )
+				return ((JSpinner)parent).getClientProperty( key );
+		}
+		return null;
 	}
 
 	/** @since 1.4 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatCheckBoxMenuItemUI.java

@@ -23,6 +23,7 @@ import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
+import javax.swing.JMenuItem;
 import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicCheckBoxMenuItemUI;
@@ -102,13 +103,23 @@ public class FlatCheckBoxMenuItemUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatComboBoxUI.java

@@ -24,6 +24,7 @@ import java.awt.Component;
 import java.awt.ComponentOrientation;
 import java.awt.Container;
 import java.awt.Dimension;
+import java.awt.EventQueue;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -48,10 +49,12 @@ import java.util.concurrent.atomic.AtomicBoolean;
 import javax.swing.AbstractAction;
 import javax.swing.BorderFactory;
 import javax.swing.CellRendererPane;
+import javax.swing.ComboBoxModel;
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.InputMap;
 import javax.swing.JButton;
 import javax.swing.JComboBox;
+import javax.swing.JComboBox.KeySelectionManager;
 import javax.swing.JComponent;
 import javax.swing.JList;
 import javax.swing.JPanel;
@@ -75,6 +78,7 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
 
@@ -102,7 +106,6 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @uiDefault ComboBox.maximumRowCount			int
  * @uiDefault ComboBox.buttonStyle				String	auto (default), button, mac or none
  * @uiDefault Component.arrowType				String	chevron (default) or triangle
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault ComboBox.editableBackground		Color	optional; defaults to ComboBox.background
  * @uiDefault ComboBox.focusedBackground		Color	optional
  * @uiDefault ComboBox.disabledBackground		Color
@@ -134,7 +137,6 @@ public class FlatComboBoxUI
 	@Styleable protected int editorColumns;
 	@Styleable protected String buttonStyle;
 	@Styleable protected String arrowType;
-	protected boolean isIntelliJTheme;
 
 	private Color background;
 	@Styleable protected Color editableBackground;
@@ -182,6 +184,9 @@ public class FlatComboBoxUI
 	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
+		// install key selection manager that shows popup when Space key is pressed
+		comboBox.setKeySelectionManager( new FlatKeySelectionManager( comboBox.getKeySelectionManager() ) );
+
 		installStyle();
 	}
 
@@ -216,10 +221,12 @@ public class FlatComboBoxUI
 
 			private void repaintArrowButton() {
 				if( arrowButton != null && !comboBox.isEditable() )
-					arrowButton.repaint();
+					HiDPIUtils.repaint( arrowButton );
 			}
 		};
 		comboBox.addMouseListener( hoverListener );
+
+		MigLayoutVisualPadding.install( comboBox );
 	}
 
 	@Override
@@ -228,6 +235,8 @@ public class FlatComboBoxUI
 
 		comboBox.removeMouseListener( hoverListener );
 		hoverListener = null;
+
+		MigLayoutVisualPadding.uninstall( comboBox );
 	}
 
 	@Override
@@ -240,7 +249,6 @@ public class FlatComboBoxUI
 		editorColumns = UIManager.getInt( "ComboBox.editorColumns" );
 		buttonStyle = UIManager.getString( "ComboBox.buttonStyle" );
 		arrowType = UIManager.getString( "Component.arrowType" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 
 		background = UIManager.getColor( "ComboBox.background" );
 		editableBackground = UIManager.getColor( "ComboBox.editableBackground" );
@@ -270,8 +278,6 @@ public class FlatComboBoxUI
 			comboBox.setMaximumRowCount( maximumRowCount );
 
 		paddingBorder = new CellPaddingBorder( padding );
-
-		MigLayoutVisualPadding.install( comboBox );
 	}
 
 	@Override
@@ -300,8 +306,6 @@ public class FlatComboBoxUI
 
 		oldStyleValues = null;
 		borderShared = null;
-
-		MigLayoutVisualPadding.uninstall( comboBox );
 	}
 
 	@Override
@@ -348,15 +352,15 @@ public class FlatComboBoxUI
 			@Override
 			public void focusGained( FocusEvent e ) {
 				super.focusGained( e );
-				if( comboBox != null && comboBox.isEditable() )
-					comboBox.repaint();
+				if( comboBox != null )
+					HiDPIUtils.repaint( comboBox );
 			}
 
 			@Override
 			public void focusLost( FocusEvent e ) {
 				super.focusLost( e );
-				if( comboBox != null && comboBox.isEditable() )
-					comboBox.repaint();
+				if( comboBox != null )
+					HiDPIUtils.repaint( comboBox );
 			}
 		};
 	}
@@ -383,12 +387,12 @@ public class FlatComboBoxUI
 				switch( propertyName ) {
 					case PLACEHOLDER_TEXT:
 						if( editor != null )
-							editor.repaint();
+							HiDPIUtils.repaint( editor );
 						break;
 
 					case COMPONENT_ROUND_RECT:
 					case OUTLINE:
-						comboBox.repaint();
+						HiDPIUtils.repaint( comboBox );
 						break;
 
 					case MINIMUM_WIDTH:
@@ -399,7 +403,7 @@ public class FlatComboBoxUI
 					case STYLE_CLASS:
 						installStyle();
 						comboBox.revalidate();
-						comboBox.repaint();
+						HiDPIUtils.repaint( comboBox );
 						break;
 				}
 			}
@@ -581,7 +585,7 @@ public class FlatComboBoxUI
 			FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
 
 			// paint arrow button background
-			if( enabled && !isCellRenderer ) {
+			if( enabled && !isCellRenderer && arrowButton.isVisible() ) {
 				Color buttonColor = paintButton
 					? buttonEditableBackground
 					: (buttonFocusedBackground != null || focusedBackground != null) && isPermanentFocusOwner( comboBox )
@@ -608,7 +612,7 @@ public class FlatComboBoxUI
 			}
 
 			// paint vertical line between value and arrow button
-			if( paintButton ) {
+			if( paintButton && arrowButton.isVisible() ) {
 				Color separatorColor = enabled ? buttonSeparatorColor : buttonDisabledSeparatorColor;
 				if( separatorColor != null && buttonSeparatorWidth > 0 ) {
 					g2.setColor( separatorColor );
@@ -679,7 +683,7 @@ public class FlatComboBoxUI
 
 			return (editableBackground != null && comboBox.isEditable()) ? editableBackground : background;
 		} else
-			return isIntelliJTheme ? FlatUIUtils.getParentBackground( comboBox ) : disabledBackground;
+			return disabledBackground;
 	}
 
 	protected Color getForeground( boolean enabled ) {
@@ -878,7 +882,7 @@ public class FlatComboBoxUI
 				GraphicsConfiguration gc = comboBox.getGraphicsConfiguration();
 				if( gc != null ) {
 					Rectangle screenBounds = gc.getBounds();
-					Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
+					Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
 					displayWidth = Math.min( displayWidth, screenBounds.width - screenInsets.left - screenInsets.right );
 				} else {
 					Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
@@ -923,7 +927,7 @@ public class FlatComboBoxUI
 		protected void configurePopup() {
 			super.configurePopup();
 
-			// make opaque to avoid that background shines thru border (e.g. at 150% scaling)
+			// make opaque to avoid that background shines through border (e.g. at 150% scaling)
 			setOpaque( true );
 
 			// set popup border
@@ -941,7 +945,7 @@ public class FlatComboBoxUI
 			if( popupBackground != null )
 				list.setBackground( popupBackground );
 
-			// set popup background because it may shine thru when scaled (e.g. at 150%)
+			// set popup background because it may shine through when scaled (e.g. at 150%)
 			// use non-UIResource to avoid that it is overwritten when making
 			// popup visible (see JPopupMenu.setInvoker()) in theme editor preview
 			setBackground( FlatUIUtils.nonUIResource( list.getBackground() ) );
@@ -986,6 +990,29 @@ public class FlatComboBoxUI
 				}
 			}
 
+			// improve location of selected item in popup if list is large and scrollable
+			if( list.getHeight() == 0 ) {
+				// If popup is shown for the first time (or after a laf switch) and is scrollable,
+				// then BasicComboPopup scrolls the selected item to the top of the visible area.
+				// But for usability it would be better to have selected item somewhere
+				// in the middle of the visible area so that the user can see items above
+				// the selected item, which are usually more "important".
+
+				int selectedIndex = list.getSelectedIndex();
+				if( selectedIndex >= 1 ) {
+					int maximumRowCount = comboBox.getMaximumRowCount();
+					if( selectedIndex < maximumRowCount ) {
+						// selected item is in the first visible items --> scroll to top
+						list.scrollRectToVisible( new Rectangle() );
+					} else {
+						// scroll the selected item to the middle of the visible area
+						int firstVisibleIndex = Math.max( selectedIndex - (maximumRowCount / 2), 0 );
+						if( firstVisibleIndex > 0 )
+							list.ensureIndexIsVisible( firstVisibleIndex );
+					}
+				}
+			}
+
 			super.show( invoker, x, y );
 		}
 
@@ -1064,7 +1091,7 @@ public class FlatComboBoxUI
 		}
 
 		// using synchronized to avoid problems with code that modifies combo box
-		// (model, selection, etc) not on AWT thread (which should be not done)
+		// (model, selection, etc.) not on AWT thread (which should be not done)
 		synchronized void install( Component c, int focusWidth ) {
 			if( !(c instanceof JComponent) )
 				return;
@@ -1209,4 +1236,46 @@ public class FlatComboBoxUI
 			}
 		}
 	}
+
+	//---- class FlatKeySelectionManager --------------------------------------
+
+	/**
+	 * Key selection manager that delegates to the default manager.
+	 * Shows the popup if Space key is pressed and "typed characters" buffer is empty.
+	 * If items contain spaces (e.g. "a b") it is still possible to select them
+	 * by pressing keys 'a', 'Space' and 'b'.
+	 */
+	private class FlatKeySelectionManager
+		implements JComboBox.KeySelectionManager, UIResource
+	{
+		private final KeySelectionManager delegate;
+		private final long timeFactor;
+		private long lastTime;
+
+		FlatKeySelectionManager( JComboBox.KeySelectionManager delegate ) {
+			this.delegate = delegate;
+
+			Long value = (Long) UIManager.get( "ComboBox.timeFactor" );
+			timeFactor = (value != null) ? value : 1000;
+		}
+
+		@SuppressWarnings( "rawtypes" )
+		@Override
+		public int selectionForKey( char aKey, ComboBoxModel aModel ) {
+			long time = EventQueue.getMostRecentEventTime();
+			long oldLastTime = lastTime;
+			lastTime = time;
+
+			// SPACE key shows popup if not yet visible
+			if( aKey == ' ' &&
+				time - oldLastTime >= timeFactor &&
+				!comboBox.isPopupVisible() )
+			{
+				comboBox.setPopupVisible( true );
+				return -1;
+			}
+
+			return delegate.selectionForKey( aKey, aModel );
+		}
+	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatDropShadowBorder.java

@@ -24,9 +24,8 @@ import java.awt.Image;
 import java.awt.Insets;
 import java.awt.RadialGradientPaint;
 import java.awt.image.BufferedImage;
-import java.util.Map;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
-import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableBorder;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -43,7 +42,7 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatDropShadowBorder
 	extends FlatEmptyBorder
-	implements StyleableBorder
+	implements StyleableObject
 {
 	@Styleable protected Color shadowColor;
 	@Styleable protected Insets shadowInsets;
@@ -74,7 +73,7 @@ public class FlatDropShadowBorder
 
 		this.shadowColor = shadowColor;
 		this.shadowInsets = shadowInsets;
-		this.shadowOpacity = shadowOpacity;
+		this.shadowOpacity = Math.min( Math.max( shadowOpacity, 0f ), 1f );
 
 		shadowSize = maxInset( shadowInsets );
 	}
@@ -93,7 +92,7 @@ public class FlatDropShadowBorder
 	/** @since 2 */
 	@Override
 	public Object applyStyleProperty( String key, Object value ) {
-		Object oldValue = FlatStylingSupport.applyToAnnotatedObject( this, key, value );
+		Object oldValue = StyleableObject.super.applyStyleProperty( key, value );
 		if( key.equals( "shadowInsets" ) ) {
 			applyStyleProperty( nonNegativeInsets( shadowInsets ) );
 			shadowSize = maxInset( shadowInsets );
@@ -101,18 +100,6 @@ public class FlatDropShadowBorder
 		return oldValue;
 	}
 
-	/** @since 2 */
-	@Override
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	@Override
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		if( shadowSize <= 0 )

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatEditorPaneUI.java

@@ -59,7 +59,6 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * <!-- FlatEditorPaneUI -->
  *
  * @uiDefault Component.minimumWidth			int
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault EditorPane.focusedBackground		Color	optional
  *
  * @author Karl Tauber
@@ -69,7 +68,6 @@ public class FlatEditorPaneUI
 	implements StyleableUI
 {
 	@Styleable protected int minimumWidth;
-	protected boolean isIntelliJTheme;
 	private Color background;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color inactiveBackground;
@@ -101,7 +99,6 @@ public class FlatEditorPaneUI
 
 		String prefix = getPropertyPrefix();
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		background = UIManager.getColor( prefix + ".background" );
 		disabledBackground = UIManager.getColor( prefix + ".disabledBackground" );
 		inactiveBackground = UIManager.getColor( prefix + ".inactiveBackground" );
@@ -174,7 +171,7 @@ public class FlatEditorPaneUI
 			case FlatClientProperties.STYLE_CLASS:
 				installStyle.run();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 		}
 	}
@@ -252,11 +249,11 @@ public class FlatEditorPaneUI
 
 	@Override
 	protected void paintBackground( Graphics g ) {
-		paintBackground( g, getComponent(), isIntelliJTheme, focusedBackground );
+		paintBackground( g, getComponent(), focusedBackground );
 	}
 
-	static void paintBackground( Graphics g, JTextComponent c, boolean isIntelliJTheme, Color focusedBackground ) {
-		g.setColor( FlatTextFieldUI.getBackground( c, isIntelliJTheme, focusedBackground ) );
+	static void paintBackground( Graphics g, JTextComponent c, Color focusedBackground ) {
+		g.setColor( FlatTextFieldUI.getBackground( c, focusedBackground ) );
 		g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatFileChooserUI.java

@@ -24,13 +24,16 @@ import java.awt.Graphics2D;
 import java.awt.Image;
 import java.awt.Insets;
 import java.awt.LayoutManager;
+import java.awt.Rectangle;
 import java.awt.RenderingHints;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.io.File;
 import java.lang.reflect.Method;
+import java.util.ArrayList;
 import java.util.function.Function;
 import javax.swing.AbstractButton;
+import javax.swing.BorderFactory;
 import javax.swing.Box;
 import javax.swing.BoxLayout;
 import javax.swing.ButtonGroup;
@@ -45,6 +48,7 @@ import javax.swing.JScrollPane;
 import javax.swing.JTable;
 import javax.swing.JToggleButton;
 import javax.swing.JToolBar;
+import javax.swing.Scrollable;
 import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.filechooser.FileSystemView;
@@ -53,6 +57,7 @@ import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.metal.MetalFileChooserUI;
 import javax.swing.table.TableCellRenderer;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.icons.FlatFileViewDirectoryIcon;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.ScaledImageIcon;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -162,6 +167,7 @@ public class FlatFileChooserUI
 {
 	private final FlatFileView fileView = new FlatFileView();
 	private FlatShortcutsPanel shortcutsPanel;
+	private JScrollPane shortcutsScrollPane;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatFileChooserUI( (JFileChooser) c );
@@ -181,7 +187,10 @@ public class FlatFileChooserUI
 			FlatShortcutsPanel panel = createShortcutsPanel( fc );
 			if( panel.getComponentCount() > 0 ) {
 				shortcutsPanel = panel;
-				fc.add( shortcutsPanel, BorderLayout.LINE_START );
+				shortcutsScrollPane = new JScrollPane( shortcutsPanel,
+					JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER );
+				shortcutsScrollPane.setBorder( BorderFactory.createEmptyBorder() );
+				fc.add( shortcutsScrollPane, BorderLayout.LINE_START );
 				fc.addPropertyChangeListener( shortcutsPanel );
 			}
 		}
@@ -194,6 +203,7 @@ public class FlatFileChooserUI
 		if( shortcutsPanel != null ) {
 			fc.removePropertyChangeListener( shortcutsPanel );
 			shortcutsPanel = null;
+			shortcutsScrollPane = null;
 		}
 	}
 
@@ -322,7 +332,7 @@ public class FlatFileChooserUI
 	public Dimension getPreferredSize( JComponent c ) {
 		Dimension prefSize = super.getPreferredSize( c );
 		Dimension minSize = getMinimumSize( c );
-		int shortcutsPanelWidth = (shortcutsPanel != null) ? shortcutsPanel.getPreferredSize().width : 0;
+		int shortcutsPanelWidth = (shortcutsScrollPane != null) ? shortcutsScrollPane.getPreferredSize().width : 0;
 		return new Dimension(
 			Math.max( prefSize.width, minSize.width + shortcutsPanelWidth ),
 			Math.max( prefSize.height, minSize.height ) );
@@ -346,12 +356,12 @@ public class FlatFileChooserUI
 			fileView.clearIconCache();
 	}
 
-	private boolean doNotUseSystemIcons() {
+	private static boolean doNotUseSystemIcons() {
 		// Java 17 32bit craches on Windows when using system icons
-		// fixed in Java 18+ (see https://bugs.openjdk.java.net/browse/JDK-8277299)
+		// fixed in Java 18+, fix backported in Java 17.0.3+ (see https://bugs.openjdk.java.net/browse/JDK-8277299)
 		return SystemInfo.isWindows &&
 			SystemInfo.isX86 &&
-			(SystemInfo.isJava_17_orLater && !SystemInfo.isJava_18_orLater);
+			(SystemInfo.isJava_17_orLater && SystemInfo.javaVersion < SystemInfo.toVersion( 17, 0, 3, 0 ));
 	}
 
 	//---- class FlatFileView -------------------------------------------------
@@ -366,27 +376,68 @@ public class FlatFileChooserUI
 			if( icon != null )
 				return icon;
 
-			// get system icon
-			if( f != null ) {
-				icon = getFileChooser().getFileSystemView().getSystemIcon( f );
+			// new proxy icon
+			//
+			// Note: Since this is a super light weight icon object, we do not add it
+			//       to the icon cache here. This keeps cache small in case of large directories
+			//       with thousands of files when icons of all files are only needed to compute
+			//       the layout of list/table, but never painted because located outside of visible area.
+			//       When an icon needs to be painted, the proxy adds it to the icon cache
+			//       and loads the real icon.
+			return new FlatFileViewIcon( f );
+		}
 
-				if( icon != null ) {
-					if( icon instanceof ImageIcon )
-						icon = new ScaledImageIcon( (ImageIcon) icon );
-					cacheIcon( f, icon );
-					return icon;
+		//---- class FlatFileViewIcon -----------------------------------------
+
+		/**
+		 * A proxy icon that has a fixed (scaled) width/height (16x16) and
+		 * gets/loads the real (system) icon only for painting.
+		 * Avoids unnecessary getting/loading system icons.
+		 */
+		private class FlatFileViewIcon
+			implements Icon
+		{
+			private final File f;
+			private Icon realIcon;
+
+			FlatFileViewIcon( File f ) {
+				this.f = f;
+			}
+
+			@Override
+			public int getIconWidth() {
+				return UIScale.scale( 16 );
+			}
+
+			@Override
+			public int getIconHeight() {
+				return UIScale.scale( 16 );
+			}
+
+			@Override
+			public void paintIcon( Component c, Graphics g, int x, int y ) {
+				// get icon on demand
+				if( realIcon == null ) {
+					// get system icon
+					try {
+						if( f != null )
+							realIcon = getFileChooser().getFileSystemView().getSystemIcon( f );
+					} catch( NullPointerException ex ) {
+						// Java 21 may throw a NPE for exe files that use default Windows exe icon
+					}
+
+					// get default icon
+					if( realIcon == null )
+						realIcon = FlatFileView.super.getIcon( f );
+
+					if( realIcon instanceof ImageIcon )
+						realIcon = new ScaledImageIcon( (ImageIcon) realIcon );
+
+					cacheIcon( f, this );
 				}
+
+				realIcon.paintIcon( c, g, x, y );
 			}
-
-			// get default icon
-			icon = super.getIcon( f );
-
-			if( icon instanceof ImageIcon ) {
-				icon = new ScaledImageIcon( (ImageIcon) icon );
-				cacheIcon( f, icon );
-			}
-
-			return icon;
 		}
 	}
 
@@ -395,7 +446,7 @@ public class FlatFileChooserUI
 	/** @since 2.3 */
 	public static class FlatShortcutsPanel
 		extends JToolBar
-		implements PropertyChangeListener
+		implements PropertyChangeListener, Scrollable
 	{
 		private final JFileChooser fc;
 
@@ -407,13 +458,14 @@ public class FlatFileChooserUI
 
 		protected final File[] files;
 		protected final JToggleButton[] buttons;
-		protected final ButtonGroup buttonGroup;
+		protected final ButtonGroup buttonGroup = new ButtonGroup();
 
 		@SuppressWarnings( "unchecked" )
 		public FlatShortcutsPanel( JFileChooser fc ) {
 			super( JToolBar.VERTICAL );
 			this.fc = fc;
 			setFloatable( false );
+			putClientProperty( FlatClientProperties.STYLE, "hoverButtonGroupBackground: null" );
 
 			buttonSize = UIScale.scale( getUIDimension( "FileChooser.shortcuts.buttonSize", 84, 64 ) );
 			iconSize = getUIDimension( "FileChooser.shortcuts.iconSize", 32, 32 );
@@ -423,22 +475,25 @@ public class FlatFileChooserUI
 			iconFunction = (Function<File, Icon>) UIManager.get( "FileChooser.shortcuts.iconFunction" );
 
 			FileSystemView fsv = fc.getFileSystemView();
-			File[] files = getChooserShortcutPanelFiles( fsv );
+			File[] files = JavaCompatibility2.getChooserShortcutPanelFiles( fsv );
 			if( filesFunction != null )
 				files = filesFunction.apply( files );
-			this.files = files;
 
 			// create toolbar buttons
-			buttons = new JToggleButton[files.length];
-			buttonGroup = new ButtonGroup();
-			for( int i = 0; i < files.length; i++ ) {
-				// wrap drive path
-				if( fsv.isFileSystemRoot( files[i] ) )
-					files[i] = fsv.createFileObject( files[i].getAbsolutePath() );
+			ArrayList<File> filesList = new ArrayList<>();
+			ArrayList<JToggleButton> buttonsList = new ArrayList<>();
+			for( File file : files ) {
+				if( file == null )
+					continue;
+
+				// wrap drive path
+				if( fsv.isFileSystemRoot( file ) )
+					file = fsv.createFileObject( file.getAbsolutePath() );
 
-				File file = files[i];
 				String name = getDisplayName( fsv, file );
 				Icon icon = getIcon( fsv, file );
+				if( name == null )
+					continue;
 
 				// remove path from name
 				int lastSepIndex = name.lastIndexOf( File.separatorChar );
@@ -452,16 +507,22 @@ public class FlatFileChooserUI
 					icon = new ShortcutIcon( icon, iconSize.width, iconSize.height );
 
 				// create button
-				JToggleButton button = createButton( name, icon );
+				JToggleButton button = createButton( name, icon, file.toString() );
+				File f = file;
 				button.addActionListener( e -> {
-					fc.setCurrentDirectory( file );
+					fc.setCurrentDirectory( f );
 				} );
 
 				add( button );
 				buttonGroup.add( button );
-				buttons[i] = button;
+
+				filesList.add( file );
+				buttonsList.add( button );
 			}
 
+			this.files = filesList.toArray( new File[filesList.size()] );
+			this.buttons = buttonsList.toArray( new JToggleButton[buttonsList.size()] );
+
 			directoryChanged( fc.getCurrentDirectory() );
 		}
 
@@ -472,8 +533,10 @@ public class FlatFileChooserUI
 			return size;
 		}
 
-		protected JToggleButton createButton( String name, Icon icon ) {
+		/** @since 3.5 */
+		protected JToggleButton createButton( String name, Icon icon, String toolTip ) {
 			JToggleButton button = new JToggleButton( name, icon );
+			button.setToolTipText( toolTip );
 			button.setVerticalTextPosition( SwingConstants.BOTTOM );
 			button.setHorizontalTextPosition( SwingConstants.CENTER );
 			button.setAlignmentX( Component.CENTER_ALIGNMENT );
@@ -483,32 +546,6 @@ public class FlatFileChooserUI
 			return button;
 		}
 
-		protected File[] getChooserShortcutPanelFiles( FileSystemView fsv ) {
-			try {
-				if( SystemInfo.isJava_12_orLater ) {
-					Method m = fsv.getClass().getMethod( "getChooserShortcutPanelFiles" );
-					File[] files = (File[]) m.invoke( fsv );
-
-					// on macOS and Linux, files consists only of the user home directory
-					if( files.length == 1 && files[0].equals( new File( System.getProperty( "user.home" ) ) ) )
-						files = new File[0];
-
-					return files;
-				} else if( SystemInfo.isWindows ) {
-					Class<?> cls = Class.forName( "sun.awt.shell.ShellFolder" );
-					Method m = cls.getMethod( "get", String.class );
-					return (File[]) m.invoke( null, "fileChooserShortcutPanelFolders" );
-				}
-			} catch( IllegalAccessException ex ) {
-				// do not log because access may be denied via VM option '--illegal-access=deny'
-			} catch( Exception ex ) {
-				LoggingFacade.INSTANCE.logSevere( null, ex );
-			}
-
-			// fallback
-			return new File[0];
-		}
-
 		protected String getDisplayName( FileSystemView fsv, File file ) {
 			if( displayNameFunction != null ) {
 				String name = displayNameFunction.apply( file );
@@ -526,29 +563,39 @@ public class FlatFileChooserUI
 					return icon;
 			}
 
-			// Java 17+ supports getting larger system icons
-			try {
-				if( SystemInfo.isJava_17_orLater ) {
-					Method m = fsv.getClass().getMethod( "getSystemIcon", File.class, int.class, int.class );
-					return (Icon) m.invoke( fsv, file, iconSize.width, iconSize.height );
-				} else if( iconSize.width > 16 || iconSize.height > 16 ) {
-					Class<?> cls = Class.forName( "sun.awt.shell.ShellFolder" );
-					if( cls.isInstance( file ) ) {
-						Method m = file.getClass().getMethod( "getIcon", boolean.class );
-						m.setAccessible( true );
-						Image image = (Image) m.invoke( file, true );
-						if( image != null )
-							return new ImageIcon( image );
-					}
-				}
-			} catch( IllegalAccessException ex ) {
-				// do not log because access may be denied via VM option '--illegal-access=deny'
-			} catch( Exception ex ) {
-				LoggingFacade.INSTANCE.logSevere( null, ex );
-			}
+			if( doNotUseSystemIcons() )
+				return new FlatFileViewDirectoryIcon();
 
-			// get system icon in default size 16x16
-			return fsv.getSystemIcon( file );
+			try {
+				// Java 17+ supports getting larger system icons
+				try {
+					if( SystemInfo.isJava_17_orLater ) {
+						Method m = fsv.getClass().getMethod( "getSystemIcon", File.class, int.class, int.class );
+						return (Icon) m.invoke( fsv, file, iconSize.width, iconSize.height );
+					} else if( iconSize.width > 16 || iconSize.height > 16 ) {
+						Class<?> cls = Class.forName( "sun.awt.shell.ShellFolder" );
+						if( cls.isInstance( file ) ) {
+							Method m = file.getClass().getMethod( "getIcon", boolean.class );
+							m.setAccessible( true );
+							Image image = (Image) m.invoke( file, true );
+							if( image != null )
+								return new ImageIcon( image );
+						}
+					}
+				} catch( Exception ex ) {
+					// do not log InaccessibleObjectException because access
+					// may be denied via VM option '--illegal-access=deny' (default in Java 16)
+					// (not catching InaccessibleObjectException here because it is new in Java 9, but FlatLaf also runs on Java 8)
+					if( !"java.lang.reflect.InaccessibleObjectException".equals( ex.getClass().getName() ) )
+						LoggingFacade.INSTANCE.logSevere( null, ex );
+				}
+
+				// get system icon in default size 16x16
+				return fsv.getSystemIcon( file );
+			} catch( NullPointerException ex ) {
+				// Java 21 may throw a NPE for exe files that use default Windows exe icon
+				return new FlatFileViewDirectoryIcon();
+			}
 		}
 
 		protected void directoryChanged( File file ) {
@@ -567,6 +614,8 @@ public class FlatFileChooserUI
 			buttonGroup.clearSelection();
 		}
 
+		//---- interface PropertyChangeListener ----
+
 		@Override
 		public void propertyChange( PropertyChangeEvent e ) {
 			switch( e.getPropertyName() ) {
@@ -575,6 +624,41 @@ public class FlatFileChooserUI
 					break;
 			}
 		}
+
+		//---- interface Scrollable ----
+
+		@Override
+		public Dimension getPreferredScrollableViewportSize() {
+			if( getComponentCount() > 0 ) {
+				Insets insets = getInsets();
+				int height = (getComponent( 0 ).getPreferredSize().height * 5) + insets.top + insets.bottom;
+				return new Dimension( getPreferredSize().width, height );
+			}
+			return getPreferredSize();
+		}
+
+		@Override
+		public int getScrollableUnitIncrement( Rectangle visibleRect, int orientation, int direction ) {
+			if( orientation == SwingConstants.VERTICAL && getComponentCount() > 0 )
+				return getComponent( 0 ).getPreferredSize().height;
+
+			return getScrollableBlockIncrement( visibleRect, orientation, direction ) / 10;
+		}
+
+		@Override
+		public int getScrollableBlockIncrement( Rectangle visibleRect, int orientation, int direction ) {
+			return (orientation == SwingConstants.VERTICAL) ? visibleRect.height : visibleRect.width;
+		}
+
+		@Override
+		public boolean getScrollableTracksViewportWidth() {
+			return true;
+		}
+
+		@Override
+		public boolean getScrollableTracksViewportHeight() {
+			return false;
+		}
 	}
 
 	//---- class ShortcutIcon -------------------------------------------------

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatFormattedTextFieldUI.java

@@ -40,7 +40,6 @@ import javax.swing.plaf.ComponentUI;
  * <!-- FlatTextFieldUI -->
  *
  * @uiDefault Component.minimumWidth					int
- * @uiDefault Component.isIntelliJTheme					boolean
  * @uiDefault FormattedTextField.placeholderForeground	Color
  * @uiDefault FormattedTextField.focusedBackground		Color	optional
  * @uiDefault FormattedTextField.iconTextGap			int		optional, default is 4

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatHTML.java

@@ -0,0 +1,290 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.function.BiConsumer;
+import javax.swing.AbstractButton;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JToolTip;
+import javax.swing.plaf.basic.BasicHTML;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.Document;
+import javax.swing.text.LabelView;
+import javax.swing.text.Style;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.View;
+import javax.swing.text.html.CSS;
+import javax.swing.text.html.HTMLDocument;
+import javax.swing.text.html.StyleSheet;
+
+/**
+ * @author Karl Tauber
+ * @since 3.5
+ */
+public class FlatHTML
+{
+	private FlatHTML() {}
+
+	/**
+	 * Adds CSS rule BASE_SIZE to the style sheet of the HTML view,
+	 * which re-calculates font sizes based on current component font size.
+	 * This is necessary for "absolute-size" keywords (e.g. "x-large")
+	 * for "font-size" attributes in default style sheet (see javax/swing/text/html/default.css).
+	 * See also <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/font-size#values">CSS font-size</a>.
+	 * <p>
+	 * This method should be invoked after {@link BasicHTML#updateRenderer(JComponent, String)}.
+	 */
+	public static void updateRendererCSSFontBaseSize( JComponent c ) {
+		View view = (View) c.getClientProperty( BasicHTML.propertyKey );
+		if( view == null )
+			return;
+
+//		dumpViews( view, 0 );
+
+		Document doc = view.getDocument();
+		if( !(doc instanceof HTMLDocument) )
+			return;
+
+		// add BASE_SIZE rule if necessary
+		//  - if point size at index 7 is not 36, then probably HTML text contains BASE_SIZE rule
+		//  - if point size at index 4 is equal to given font size, then it is not necessary to add BASE_SIZE rule
+		StyleSheet styleSheet = ((HTMLDocument)doc).getStyleSheet();
+/*debug
+		for( int i = 1; i <= 7; i++ )
+			System.out.println( i+": "+ styleSheet.getPointSize( i ) );
+debug*/
+		Font font = c.getFont();
+		if( styleSheet.getPointSize( 7 ) != 36f ||
+			font == null || styleSheet.getPointSize( 4 ) == font.getSize() )
+		  return;
+
+		// check whether view uses "absolute-size" keywords (e.g. "x-large") for font-size
+		if( !usesAbsoluteSizeKeywordForFontSize( view ) )
+			return;
+
+		// get HTML text from component
+		String text;
+		if( c instanceof JLabel )
+			text = ((JLabel)c).getText();
+		else if( c instanceof AbstractButton )
+			text = ((AbstractButton)c).getText();
+		else if( c instanceof JToolTip )
+			text = ((JToolTip)c).getTipText();
+		else
+			return;
+		if( text == null || !BasicHTML.isHTMLString( text ) )
+			return;
+
+		// BASE_SIZE rule is parsed in javax.swing.text.html.StyleSheet.addRule()
+		String style = "<style>BASE_SIZE " + font.getSize() + "</style>";
+		String openTag = "";
+		String closeTag = "";
+
+		int headIndex;
+		int styleIndex;
+
+		int insertIndex;
+		if( (headIndex = indexOfTag( text, "head", true )) >= 0 ) {
+			// there is a <head> tag --> insert after <head> tag
+			insertIndex = headIndex;
+		} else if( (styleIndex = indexOfTag( text, "style", false )) >= 0 ) {
+			// there is a <style> tag --> insert before <style> tag
+			insertIndex = styleIndex;
+		} else {
+			// no <head> or <style> tag --> insert <head> tag after <html> tag
+			insertIndex = "<html>".length();
+			openTag = "<head>";
+			closeTag = "</head>";
+		}
+
+		String newText = text.substring( 0, insertIndex )
+			+ openTag + style + closeTag
+			+ text.substring( insertIndex );
+
+		BasicHTML.updateRenderer( c, newText );
+
+		// for unit tests
+		if( testUpdateRenderer != null )
+			testUpdateRenderer.accept( c, newText );
+	}
+
+	// for unit tests
+	static BiConsumer<JComponent, String> testUpdateRenderer;
+
+	/**
+	 * Returns start or end index of a HTML tag.
+	 * Checks only for leading '<' character and (case-ignore) tag name.
+	 */
+	private static int indexOfTag( String html, String tag, boolean endIndex ) {
+		int tagLength = tag.length();
+		int maxLength = html.length() - tagLength - 2;
+		char lastTagChar = tag.charAt( tagLength - 1 );
+
+		for( int i = "<html>".length(); i < maxLength; i++ ) {
+			// check for leading '<' and last tag name character
+			if( html.charAt( i ) == '<' && Character.toLowerCase( html.charAt( i + tagLength ) ) == lastTagChar ) {
+				// compare tag characters from last to first
+				for( int j = tagLength - 2; j >= 0; j-- ) {
+					if( Character.toLowerCase( html.charAt( i + 1 + j ) ) != tag.charAt( j ) )
+						break; // not equal
+
+					if( j == 0 ) {
+						// tag found
+						return endIndex ? html.indexOf( '>', i + tagLength ) + 1 : i;
+					}
+				}
+			}
+		}
+
+		return -1;
+	}
+
+	private static final Set<String> absoluteSizeKeywordsSet = new HashSet<>( Arrays.asList(
+		"xx-small", "x-small", "small", "medium", "large", "x-large", "xx-large" ) );
+
+	/**
+	 * Checks whether view uses "absolute-size" keywords (e.g. "x-large") for font-size
+	 * (see javax/swing/text/html/default.css).
+	 */
+	private static boolean usesAbsoluteSizeKeywordForFontSize( View view ) {
+		AttributeSet attributes = view.getAttributes();
+		if( attributes != null ) {
+			Object fontSize = attributes.getAttribute( CSS.Attribute.FONT_SIZE );
+			if( fontSize != null ) {
+				if( absoluteSizeKeywordsSet.contains( fontSize.toString() ) )
+					return true;
+			}
+		}
+
+		int viewCount = view.getViewCount();
+		for( int i = 0; i < viewCount; i++ ) {
+			if( usesAbsoluteSizeKeywordForFontSize( view.getView( i ) ) )
+				return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Updates foreground in style sheet of the HTML view.
+	 * Adds "body { color: #&lt;foreground-hex&gt;; }"
+	 */
+	public static void updateRendererCSSForeground( View view, Color foreground ) {
+		Document doc = view.getDocument();
+		if( !(doc instanceof HTMLDocument) || foreground == null )
+			return;
+
+		// add foreground rule if necessary
+		//  - use tag 'body' because BasicHTML.createHTMLView() also uses this tag
+		//    to set font and color styles to component font/color
+		//    see: SwingUtilities2.displayPropertiesToCSS()
+		//  - this color is not used if component is disabled;
+		//    JTextComponent.getDisabledTextColor() is used for disabled text components;
+		//    UIManager.getColor("textInactiveText") is used for other disabled components
+		//    see: javax.swing.text.GlyphView.paint()
+		Style bodyStyle = ((HTMLDocument)doc).getStyle( "body" );
+		if( bodyStyle == null ) {
+			StyleSheet styleSheet = ((HTMLDocument)doc).getStyleSheet();
+			styleSheet.addRule( String.format( "body { color: #%06x; }", foreground.getRGB() & 0xffffff ) );
+			clearViewCaches( view );
+		} else if( !foreground.equals( bodyStyle.getAttribute( StyleConstants.Foreground ) ) ) {
+			bodyStyle.addAttribute( StyleConstants.Foreground, foreground );
+			clearViewCaches( view );
+		}
+	}
+
+	/**
+	 * Clears cached values in view so that CSS changes take effect.
+	 */
+	private static void clearViewCaches( View view ) {
+		if( view instanceof LabelView )
+			((LabelView)view).changedUpdate( null, null, null );
+
+		int viewCount = view.getViewCount();
+		for( int i = 0; i < viewCount; i++ )
+			clearViewCaches( view.getView( i ) );
+	}
+
+	public static PropertyChangeListener createPropertyChangeListener( PropertyChangeListener superListener ) {
+		return e -> {
+			if( superListener != null )
+				superListener.propertyChange( e );
+			propertyChange( e );
+		};
+	}
+
+	/**
+	 * Invokes {@link #updateRendererCSSFontBaseSize(JComponent)}
+	 * for {@link BasicHTML#propertyKey} property change events,
+	 * which are fired when {@link BasicHTML#updateRenderer(JComponent, String)}
+	 * updates the HTML view.
+	 */
+	public static void propertyChange( PropertyChangeEvent e ) {
+		if( BasicHTML.propertyKey.equals( e.getPropertyName() ) && e.getNewValue() instanceof View )
+			updateRendererCSSFontBaseSize( (JComponent) e.getSource() );
+	}
+
+/*debug
+	public static void dumpView( JComponent c ) {
+		View view = (View) c.getClientProperty( BasicHTML.propertyKey );
+		if( view != null )
+			dumpViews( view, 0 );
+	}
+
+	public static void dumpViews( View view, int indent ) {
+		for( int i = 0; i < indent; i++ )
+			System.out.print( "    " );
+
+		System.out.printf( "%s @%-8x   %3d,%2d",
+			view.getClass().isAnonymousClass() ? view.getClass().getName() : view.getClass().getSimpleName(),
+			System.identityHashCode( view ),
+			(int) view.getPreferredSpan( View.X_AXIS ),
+			(int) view.getPreferredSpan( View.Y_AXIS ) );
+
+		AttributeSet attrs = view.getAttributes();
+		if( attrs != null ) {
+			Object fontSize = attrs.getAttribute( CSS.Attribute.FONT_SIZE );
+			System.out.printf( "  %-8s", fontSize );
+		}
+
+		if( view instanceof javax.swing.text.GlyphView ) {
+			javax.swing.text.GlyphView gview = ((javax.swing.text.GlyphView)view);
+			java.awt.Font font = gview.getFont();
+			System.out.printf( "   %3d-%-3d  %s %2d (@%x)  #%06x  '%s'",
+				gview.getStartOffset(), gview.getEndOffset() - 1,
+				font.getName(), font.getSize(), System.identityHashCode( font ),
+				gview.getForeground().getRGB() & 0xffffff,
+				gview.getText( gview.getStartOffset(), gview.getEndOffset() ) );
+		}
+		System.out.println();
+
+		int viewCount = view.getViewCount();
+		for( int i = 0; i < viewCount; i++ ) {
+			View child = view.getView( i );
+			dumpViews( child, indent + 1 );
+		}
+	}
+debug*/
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatInternalFrameUI.java

@@ -35,7 +35,7 @@ import javax.swing.event.MouseInputAdapter;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicInternalFrameUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
-import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableBorder;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.LoggingFacade;
 
@@ -209,7 +209,7 @@ public class FlatInternalFrameUI
 
 	public static class FlatInternalFrameBorder
 		extends FlatEmptyBorder
-		implements StyleableBorder
+		implements StyleableObject
 	{
 		@Styleable protected Color activeBorderColor = UIManager.getColor( "InternalFrame.activeBorderColor" );
 		@Styleable protected Color inactiveBorderColor = UIManager.getColor( "InternalFrame.inactiveBorderColor" );

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatLabelUI.java

@@ -22,10 +22,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Rectangle;
 import java.beans.PropertyChangeEvent;
-import java.util.Arrays;
-import java.util.HashSet;
 import java.util.Map;
-import java.util.Set;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JLabel;
@@ -63,6 +60,9 @@ public class FlatLabelUI
 {
 	@Styleable protected Color disabledForeground;
 
+	// only used via styling (not in UI defaults)
+	/** @since 3.5 */ @Styleable protected int arc = -1;
+
 	private final boolean shared;
 	private boolean defaults_initialized = false;
 	private Map<String, Object> oldStyleValues;
@@ -109,16 +109,13 @@ public class FlatLabelUI
 		super.installComponents( c );
 
 		// update HTML renderer if necessary
-		updateHTMLRenderer( c, c.getText(), false );
+		FlatHTML.updateRendererCSSFontBaseSize( c );
 	}
 
 	@Override
 	public void propertyChange( PropertyChangeEvent e ) {
 		String name = e.getPropertyName();
-		if( name == "text" || name == "font" || name == "foreground" ) {
-			JLabel label = (JLabel) e.getSource();
-			updateHTMLRenderer( label, label.getText(), true );
-		} else if( name.equals( FlatClientProperties.STYLE ) || name.equals( FlatClientProperties.STYLE_CLASS ) ) {
+		if( name.equals( FlatClientProperties.STYLE ) || name.equals( FlatClientProperties.STYLE_CLASS ) ) {
 			JLabel label = (JLabel) e.getSource();
 			if( shared && FlatStylingSupport.hasStyleProperty( label ) ) {
 				// unshare component UI if necessary
@@ -127,9 +124,11 @@ public class FlatLabelUI
 			} else
 				installStyle( label );
 			label.revalidate();
-			label.repaint();
-		} else
-			super.propertyChange( e );
+			HiDPIUtils.repaint( label );
+		}
+
+		super.propertyChange( e );
+		FlatHTML.propertyChange( e );
 	}
 
 	/** @since 2 */
@@ -164,83 +163,10 @@ public class FlatLabelUI
 		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
 	}
 
-	/**
-	 * Checks whether text contains HTML tags that use "absolute-size" keywords
-	 * (e.g. "x-large") for font-size in default style sheet
-	 * (see javax/swing/text/html/default.css).
-	 * If yes, adds a special CSS rule (BASE_SIZE) to the HTML text, which
-	 * re-calculates font sizes based on current component font size.
-	 */
-	static void updateHTMLRenderer( JComponent c, String text, boolean always ) {
-		if( BasicHTML.isHTMLString( text ) &&
-			c.getClientProperty( "html.disable" ) != Boolean.TRUE &&
-			needsFontBaseSize( text ) )
-		{
-			// BASE_SIZE rule is parsed in javax.swing.text.html.StyleSheet.addRule()
-			String style = "<style>BASE_SIZE " + c.getFont().getSize() + "</style>";
-
-			String lowerText = text.toLowerCase();
-			int headIndex;
-			int styleIndex;
-
-			int insertIndex;
-			if( (headIndex = lowerText.indexOf( "<head>" )) >= 0 ) {
-				// there is a <head> tag --> insert after <head> tag
-				insertIndex = headIndex + "<head>".length();
-			} else if( (styleIndex = lowerText.indexOf( "<style>" )) >= 0 ) {
-				// there is a <style> tag --> insert before <style> tag
-				insertIndex = styleIndex;
-			} else {
-				// no <head> or <style> tag --> insert <head> tag after <html> tag
-				style = "<head>" + style + "</head>";
-				insertIndex = "<html>".length();
-			}
-
-			text = text.substring( 0, insertIndex )
-				+ style
-				+ text.substring( insertIndex );
-		} else if( !always )
-			return; // not necessary to invoke BasicHTML.updateRenderer()
-
-		BasicHTML.updateRenderer( c, text );
-	}
-
-	private static Set<String> tagsUseFontSizeSet;
-
-	private static boolean needsFontBaseSize( String text ) {
-		if( tagsUseFontSizeSet == null ) {
-			// tags that use font-size in javax/swing/text/html/default.css
-			tagsUseFontSizeSet = new HashSet<>( Arrays.asList(
-				"h1", "h2", "h3", "h4", "h5", "h6", "code", "kbd", "big", "small", "samp" ) );
-		}
-
-		// search for tags in HTML text
-		int textLength = text.length();
-		for( int i = 6; i < textLength - 1; i++ ) {
-			if( text.charAt( i ) == '<' ) {
-				switch( text.charAt( i + 1 ) ) {
-					// first letters of tags in tagsUseFontSizeSet
-					case 'b': case 'B':
-					case 'c': case 'C':
-					case 'h': case 'H':
-					case 'k': case 'K':
-					case 's': case 'S':
-						int tagBegin = i + 1;
-						for( i += 2; i < textLength; i++ ) {
-							if( !Character.isLetterOrDigit( text.charAt( i ) ) ) {
-								String tag = text.substring( tagBegin, i ).toLowerCase();
-								if( tagsUseFontSizeSet.contains( tag ) )
-									return true;
-
-								break;
-							}
-						}
-						break;
-				}
-			}
-		}
-
-		return false;
+	@Override
+	public void update( Graphics g, JComponent c ) {
+		FlatPanelUI.fillRoundedBackground( g, c, arc );
+		paint( g, c );
 	}
 
 	static Graphics createGraphicsHTMLTextYCorrection( Graphics g, JComponent c ) {

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatLineBorder.java

@@ -22,13 +22,21 @@ import java.awt.Component;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.plaf.ComponentUI;
 
 /**
  * Line border for various components.
- *
+ * <p>
  * Paints a scaled (usually 1px thick) line around the component.
  * The line thickness is not added to the border insets.
  * The insets should be at least have line thickness (usually 1,1,1,1).
+ * <p>
+ * For {@link javax.swing.JPanel} and {@link javax.swing.JLabel}, this border
+ * can be used paint rounded background (if line color is {@code null}) or
+ * paint rounded line border with rounded background.
  *
  * @author Karl Tauber
  */
@@ -40,7 +48,7 @@ public class FlatLineBorder
 	/** @since 2 */ private final int arc;
 
 	public FlatLineBorder( Insets insets, Color lineColor ) {
-		this( insets, lineColor, 1f, 0 );
+		this( insets, lineColor, 1f, -1 );
 	}
 
 	/** @since 2 */
@@ -51,26 +59,62 @@ public class FlatLineBorder
 		this.arc = arc;
 	}
 
+	/** @since 3.5 */
+	public FlatLineBorder( Insets insets, int arc ) {
+		this( insets, null, 0, arc );
+	}
+
 	public Color getLineColor() {
 		return lineColor;
 	}
 
+	/**
+	 * Returns the (unscaled) line thickness used to paint the border.
+	 * The line thickness does not affect the border insets.
+	 */
 	public float getLineThickness() {
 		return lineThickness;
 	}
 
-	/** @since 2 */
+	/**
+	 * Returns the (unscaled) arc diameter of the border corners.
+	 *
+	 * @since 2
+	 */
 	public int getArc() {
 		return arc;
 	}
 
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+		if( c instanceof JComponent && ((JComponent)c).getClientProperty( FlatPopupFactory.KEY_POPUP_USES_NATIVE_BORDER ) != null )
+			return;
+
+		Color lineColor = getLineColor();
+		float lineThickness = getLineThickness();
+		if( lineColor == null || lineThickness <= 0 )
+			return;
+
+		int arc = getArc();
+		if( arc < 0 ) {
+			// get arc from label or panel
+			ComponentUI ui = (c instanceof JLabel)
+				? ((JLabel)c).getUI()
+				: (c instanceof JPanel ? ((JPanel)c).getUI() : null);
+			if( ui instanceof FlatLabelUI )
+				arc = ((FlatLabelUI)ui).arc;
+			else if( ui instanceof FlatPanelUI )
+				arc = ((FlatPanelUI)ui).arc;
+
+			if( arc < 0 )
+				arc = 0;
+		}
+
 		Graphics2D g2 = (Graphics2D) g.create();
 		try {
 			FlatUIUtils.setRenderingHints( g2 );
 			FlatUIUtils.paintOutlinedComponent( g2, x, y, width, height,
-				0, 0, 0, scale( getLineThickness() ), scale( getArc() ), null, getLineColor(), null );
+				0, 0, 0, scale( lineThickness ), scale( arc ), null, lineColor, null );
 		} finally {
 			g2.dispose();
 		}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatListUI.java

@@ -43,6 +43,7 @@ import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.Graphics2DProxy;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -56,6 +57,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault List.foreground						Color
  * @uiDefault List.selectionBackground				Color
  * @uiDefault List.selectionForeground				Color
+ * @uiDefault List.alternateRowColor				Color
  * @uiDefault List.dropLineColor					Color
  * @uiDefault List.border							Border
  * @uiDefault List.cellRenderer						ListCellRenderer
@@ -92,6 +94,7 @@ public class FlatListUI
 	@Styleable protected Color selectionForeground;
 	@Styleable protected Color selectionInactiveBackground;
 	@Styleable protected Color selectionInactiveForeground;
+	/** @since 3.6 */ @Styleable protected Color alternateRowColor;
 	/** @since 3 */ @Styleable protected Insets selectionInsets;
 	/** @since 3 */ @Styleable protected int selectionArc;
 
@@ -128,6 +131,7 @@ public class FlatListUI
 		selectionForeground = UIManager.getColor( "List.selectionForeground" );
 		selectionInactiveBackground = UIManager.getColor( "List.selectionInactiveBackground" );
 		selectionInactiveForeground = UIManager.getColor( "List.selectionInactiveForeground" );
+		alternateRowColor = UIManager.getColor( "List.alternateRowColor" );
 		selectionInsets = UIManager.getInsets( "List.selectionInsets" );
 		selectionArc = UIManager.getInt( "List.selectionArc" );
 
@@ -142,6 +146,7 @@ public class FlatListUI
 		selectionForeground = null;
 		selectionInactiveBackground = null;
 		selectionInactiveForeground = null;
+		alternateRowColor = null;
 
 		oldStyleValues = null;
 	}
@@ -182,7 +187,7 @@ public class FlatListUI
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					list.revalidate();
-					list.repaint();
+					HiDPIUtils.repaint( list );
 					break;
 			}
 		};
@@ -205,7 +210,7 @@ public class FlatListUI
 				Rectangle r = getCellBounds( list, firstIndex, lastIndex );
 				if( r != null ) {
 					int arc = (int) Math.ceil( UIScale.scale( selectionArc / 2f ) );
-					list.repaint( r.x - arc, r.y - arc, r.width + (arc * 2), r.height + (arc * 2) );
+					HiDPIUtils.repaint( list, r.x - arc, r.y - arc, r.width + (arc * 2), r.height + (arc * 2) );
 				}
 			}
 		};
@@ -297,6 +302,18 @@ public class FlatListUI
 		ListModel dataModel, ListSelectionModel selModel, int leadIndex )
 	{
 		boolean isSelected = selModel.isSelectedIndex( row );
+		boolean isDropRow = isDropRow( row );
+
+		// paint alternating rows
+		if( alternateRowColor != null && row % 2 != 0 &&
+			!"ComboBox.list".equals( list.getName() ) ) // combobox does not support alternate row color
+		{
+			g.setColor( alternateRowColor );
+
+			float arc = UIScale.scale( selectionArc / 2f );
+			FlatUIUtils.paintSelection( (Graphics2D) g, rowBounds.x, rowBounds.y, rowBounds.width, rowBounds.height,
+				UIScale.scale( selectionInsets ), arc, arc, arc, arc, 0 );
+		}
 
 		// get renderer component
 		@SuppressWarnings( "unchecked" )
@@ -304,7 +321,7 @@ public class FlatListUI
 			dataModel.getElementAt( row ), row, isSelected,
 			FlatUIUtils.isPermanentFocusOwner( list ) && (row == leadIndex) );
 
-		//
+		// use smaller cell width if list is used in JFileChooser
 		boolean isFileList = Boolean.TRUE.equals( list.getClientProperty( "List.isFileList" ) );
 		int cx, cw;
 		if( isFileList ) {
@@ -319,13 +336,12 @@ public class FlatListUI
 		}
 
 		// rounded selection or selection insets
-		if( isSelected &&
+		if( (isSelected || isDropRow) &&
 			!isFileList && // rounded selection is not supported for file list
 			(rendererComponent instanceof DefaultListCellRenderer ||
 			 rendererComponent instanceof BasicComboBoxRenderer) &&
 			(selectionArc > 0 ||
-			 (selectionInsets != null &&
-			  (selectionInsets.top != 0 || selectionInsets.left != 0 || selectionInsets.bottom != 0 || selectionInsets.right != 0))) )
+			 (selectionInsets != null && !FlatUIUtils.isInsetsEmpty( selectionInsets ))) )
 		{
 			// Because selection painting is done in the cell renderer, it would be
 			// necessary to require a FlatLaf specific renderer to implement rounded selection.
@@ -361,7 +377,22 @@ public class FlatListUI
 						this.getColor() == rendererComponent.getBackground() )
 					{
 						inPaintSelection = true;
-						paintCellSelection( this, row, x, y, width, height );
+						if( isDropRow ) {
+							// for rounded drop background, it is necessary to first
+							// paint selection background because may be not rounded on some corners
+							if( isSelected ) {
+								Color oldColor = getColor();
+								setColor( list.getSelectionBackground() );
+								paintCellSelection( this, row, x, y, width, height );
+								setColor( oldColor );
+							}
+
+							// paint drop background
+							float arc = UIScale.scale( selectionArc / 2f );
+							FlatUIUtils.paintSelection( this, x, y, width, height,
+								UIScale.scale( selectionInsets ), arc, arc, arc, arc, 0 );
+						} else
+							paintCellSelection( this, row, x, y, width, height );
 						inPaintSelection = false;
 					} else
 						super.fillRect( x, y, width, height );
@@ -374,7 +405,15 @@ public class FlatListUI
 		rendererPane.paintComponent( g, rendererComponent, list, cx, rowBounds.y, cw, rowBounds.height, true );
 	}
 
-	/** @since 3 */
+	/**
+	 * Paints (rounded) cell selection.
+	 * Supports {@link #selectionArc} and {@link #selectionInsets}.
+	 * <p>
+	 * <b>Note:</b> This method is only invoked if either selection arc
+	 *              is greater than zero or if selection insets are not empty.
+	 *
+	 * @since 3
+	 */
 	protected void paintCellSelection( Graphics g, int row, int x, int y, int width, int height ) {
 		float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
 		arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
@@ -411,7 +450,7 @@ public class FlatListUI
 				int leftIndex = locationToIndex( list, new Point( r.x - 1, r.y ) );
 				int rightIndex = locationToIndex( list, new Point( r.x + r.width, r.y ) );
 
-				// special handling for the case that last column contains less cells than the other columns
+				// special handling for the case that last column contains fewer cells than the other columns
 				boolean ltr = list.getComponentOrientation().isLeftToRight();
 				if( !ltr && leftIndex >= 0 && leftIndex != row && leftIndex == locationToIndex( list, new Point( r.x - 1, r.y - 1 ) ) )
 					leftIndex = -1;
@@ -440,7 +479,8 @@ public class FlatListUI
 	 * Paints a cell selection at the given coordinates.
 	 * The selection color must be set on the graphics context.
 	 * <p>
-	 * This method is intended for use in custom cell renderers.
+	 * This method is intended for use in custom cell renderers
+	 * to support {@link #selectionArc} and {@link #selectionInsets}.
 	 *
 	 * @since 3
 	 */
@@ -451,4 +491,15 @@ public class FlatListUI
 		FlatListUI ui = (FlatListUI) list.getUI();
 		ui.paintCellSelection( g, row, x, y, width, height );
 	}
+
+	/**
+	 * Checks whether dropping on a row.
+	 * See DefaultListCellRenderer.getListCellRendererComponent().
+	 */
+	private boolean isDropRow( int row ) {
+		JList.DropLocation dropLocation = list.getDropLocation();
+		return dropLocation != null &&
+			!dropLocation.isInsert() &&
+			dropLocation.getIndex() == row;
+	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuBarBorder.java

@@ -21,11 +21,10 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics;
 import java.awt.Insets;
-import java.util.Map;
 import javax.swing.JMenuBar;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
-import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableBorder;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 
 /**
  * Border for {@link javax.swing.JMenuBar}.
@@ -36,27 +35,10 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableBorder;
  */
 public class FlatMenuBarBorder
 	extends FlatMarginBorder
-	implements StyleableBorder
+	implements StyleableObject
 {
 	@Styleable protected Color borderColor = UIManager.getColor( "MenuBar.borderColor" );
 
-	/** @since 2 */
-	@Override
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	@Override
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	@Override
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		if( !showBottomSeparator( c ) )

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuBarUI.java

@@ -27,7 +27,6 @@ import java.awt.event.ActionEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
-import javax.swing.AbstractAction;
 import javax.swing.ActionMap;
 import javax.swing.BoxLayout;
 import javax.swing.JComponent;
@@ -39,7 +38,6 @@ import javax.swing.MenuElement;
 import javax.swing.MenuSelectionManager;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
-import javax.swing.plaf.ActionMapUIResource;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicMenuBarUI;
@@ -144,12 +142,10 @@ public class FlatMenuBarUI
 	protected void installKeyboardActions() {
 		super.installKeyboardActions();
 
+		// get shared action map, used for all menu bars
 		ActionMap map = SwingUtilities.getUIActionMap( menuBar );
-		if( map == null ) {
-			map = new ActionMapUIResource();
-			SwingUtilities.replaceUIActionMap( menuBar, map );
-		}
-		map.put( "takeFocus", new TakeFocus() );
+		if( map != null && !(map.get( "takeFocus" ) instanceof TakeFocusAction) )
+			map.put( "takeFocus", new TakeFocusAction( "takeFocus" ) );
 	}
 
 	/** @since 2 */
@@ -365,16 +361,20 @@ public class FlatMenuBarUI
 		}
 	}
 
-	//---- class TakeFocus ----------------------------------------------------
+	//---- class TakeFocusAction ----------------------------------------------
 
 	/**
 	 * Activates the menu bar and shows mnemonics.
 	 * On Windows, the popup of the first menu is not shown.
 	 * On other platforms, the popup of the first menu is shown.
 	 */
-	private static class TakeFocus
-		extends AbstractAction
+	private static class TakeFocusAction
+		extends FlatUIAction
 	{
+		TakeFocusAction( String name ) {
+			super( name );
+		}
+
 		@Override
 		public void actionPerformed( ActionEvent e ) {
 			JMenuBar menuBar = (JMenuBar) e.getSource();

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuItemRenderer.java

@@ -25,7 +25,9 @@ import java.awt.Font;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.GridLayout;
 import java.awt.Insets;
+import java.awt.LayoutManager;
 import java.awt.Paint;
 import java.awt.Rectangle;
 import java.awt.event.InputEvent;
@@ -35,6 +37,7 @@ import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JMenu;
+import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.KeyStroke;
 import javax.swing.SwingUtilities;
@@ -222,7 +225,7 @@ public class FlatMenuItemRenderer
 		}
 
 		// arrow size
-		if( !isTopLevelMenu && arrowIcon != null ) {
+		if( arrowIcon != null && (!isTopLevelMenu || isInVerticalMenuBar( menuItem )) ) {
 			// gap between text and arrow
 			if( accelText == null )
 				width += scale( textNoAcceleratorGap );
@@ -254,7 +257,8 @@ public class FlatMenuItemRenderer
 		boolean isTopLevelMenu = isTopLevelMenu( menuItem );
 
 		// layout arrow
-		if( !isTopLevelMenu && arrowIcon != null ) {
+		boolean showArrowIcon = (arrowIcon != null && (!isTopLevelMenu || isInVerticalMenuBar( menuItem )));
+		if( showArrowIcon ) {
 			arrowRect.width = arrowIcon.getIconWidth();
 			arrowRect.height = arrowIcon.getIconHeight();
 		} else
@@ -288,7 +292,7 @@ public class FlatMenuItemRenderer
 		int accelArrowWidth = accelRect.width + arrowRect.width;
 		if( accelText != null )
 			accelArrowWidth += scale( !isTopLevelMenu ? textAcceleratorGap : menuItem.getIconTextGap() );
-		if( !isTopLevelMenu && arrowIcon != null ) {
+		if( showArrowIcon ) {
 			if( accelText == null )
 				accelArrowWidth += scale( textNoAcceleratorGap );
 			accelArrowWidth += scale( acceleratorArrowGap );
@@ -355,7 +359,7 @@ debug*/
 		paintIcon( g, iconRect, getIconForPainting(), underlineSelection ? underlineSelectionCheckBackground : checkBackground, selectionBackground );
 		paintText( g, textRect, menuItem.getText(), selectionForeground, disabledForeground );
 		paintAccelerator( g, accelRect, getAcceleratorText(), acceleratorForeground, acceleratorSelectionForeground, disabledForeground );
-		if( !isTopLevelMenu( menuItem ) )
+		if( arrowIcon != null && (!isTopLevelMenu( menuItem ) || isInVerticalMenuBar( menuItem )) )
 			paintArrowIcon( g, arrowRect, arrowIcon );
 	}
 
@@ -520,6 +524,15 @@ debug*/
 		return menuItem instanceof JMenu && ((JMenu)menuItem).isTopLevelMenu();
 	}
 
+	/** @since 3.5 */
+	public static boolean isInVerticalMenuBar( JMenuItem menuItem ) {
+		if( !(menuItem instanceof JMenu) || !(menuItem.getParent() instanceof JMenuBar) )
+			return false;
+
+		LayoutManager layout = menuItem.getParent().getLayout();
+		return layout instanceof GridLayout && ((GridLayout)layout).getRows() != 1;
+	}
+
 	protected boolean isUnderlineSelection() {
 		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuItemUI.java

@@ -103,13 +103,23 @@ public class FlatMenuItemUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuUI.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
+import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Font;
 import java.awt.Graphics;
@@ -46,6 +47,7 @@ import javax.swing.plaf.basic.BasicMenuUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -135,6 +137,14 @@ public class FlatMenuUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
@@ -158,7 +168,7 @@ public class FlatMenuUI
 				JMenu menu = (JMenu) e.getSource();
 				if( menu.isTopLevelMenu() && menu.isRolloverEnabled() ) {
 					menu.getModel().setRollover( rollover );
-					menu.repaint();
+					HiDPIUtils.repaint( menu );
 				}
 			}
 		};
@@ -166,7 +176,9 @@ public class FlatMenuUI
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */
@@ -271,7 +283,7 @@ public class FlatMenuUI
 				if( !isHover() )
 					selectionBackground = getStyleFromMenuBarUI( ui -> ui.selectionBackground, menuBarSelectionBackground, selectionBackground );
 
-				JMenuBar menuBar = (JMenuBar) menuItem.getParent();
+				Container menuBar = menuItem.getParent();
 				JRootPane rootPane = SwingUtilities.getRootPane( menuBar );
 				if( rootPane != null && rootPane.getParent() instanceof Window &&
 					rootPane.getJMenuBar() == menuBar &&
@@ -321,12 +333,17 @@ public class FlatMenuUI
 		}
 
 		private <T> T getStyleFromMenuBarUI( Function<FlatMenuBarUI, T> f, T defaultValue ) {
-			MenuBarUI ui = ((JMenuBar)menuItem.getParent()).getUI();
-			if( !(ui instanceof FlatMenuBarUI) )
-				return defaultValue;
-
-			T value = f.apply( (FlatMenuBarUI) ui );
-			return (value != null) ? value : defaultValue;
+			Container menuItemParent = menuItem.getParent();
+			if( menuItemParent instanceof JMenuBar ) {
+				MenuBarUI ui = ((JMenuBar) menuItemParent).getUI();
+				if( ui instanceof FlatMenuBarUI ) {
+					T value = f.apply( (FlatMenuBarUI) ui );
+					if( value != null ) {
+						return value;
+					}
+				}
+			}
+			return defaultValue;
 		}
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeLibrary.java

@@ -22,6 +22,7 @@ import java.security.CodeSource;
 import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.NativeLibrary;
+import com.formdev.flatlaf.util.StringUtils;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -33,41 +34,71 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 class FlatNativeLibrary
 {
+	private static boolean initialized;
 	private static NativeLibrary nativeLibrary;
 
+	private native static int getApiVersion();
+
 	/**
 	 * Loads native library (if available) and returns whether loaded successfully.
 	 * Returns {@code false} if no native library is available.
 	 */
-	static synchronized boolean isLoaded() {
-		initialize();
+	static synchronized boolean isLoaded( int apiVersion ) {
+		initialize( apiVersion );
 		return (nativeLibrary != null) ? nativeLibrary.isLoaded() : false;
 	}
 
-	private static void initialize() {
-		if( nativeLibrary != null )
+	private static void initialize( int apiVersion ) {
+		if( initialized )
+			return;
+		initialized = true;
+
+		if( !FlatSystemProperties.getBoolean( FlatSystemProperties.USE_NATIVE_LIBRARY, true ) )
 			return;
 
 		String classifier;
 		String ext;
-		if( SystemInfo.isWindows_10_orLater && (SystemInfo.isX86 || SystemInfo.isX86_64) ) {
-			// Windows: requires Windows 10/11 (x86 or x86_64)
+		boolean unknownArch = false;
+		if( SystemInfo.isWindows_10_orLater && (SystemInfo.isX86 || SystemInfo.isX86_64 || SystemInfo.isAARCH64) ) {
+			// Windows: requires Windows 10/11 (x86, x86_64 or aarch64)
+
+			if( SystemInfo.isAARCH64 )
+				classifier = "windows-arm64";
+			else if( SystemInfo.isX86_64 )
+				classifier = "windows-x86_64";
+			else
+				classifier = "windows-x86";
 
-			classifier = SystemInfo.isX86_64 ? "windows-x86_64" : "windows-x86";
 			ext = "dll";
 
-			// In Java 8, load jawt.dll (part of JRE) explicitly because it
-			// is not found when running application with <jdk>/bin/java.exe.
-			// When using <jdk>/jre/bin/java.exe, it is found.
-			// jawt.dll is located in <jdk>/jre/bin/.
-			// Java 9 and later do not have this problem,
-			// but load jawt.dll anyway to be on the safe side.
-			loadJAWT();
-		} else if( SystemInfo.isLinux && SystemInfo.isX86_64 ) {
-			// Linux: requires x86_64
+			// Do not load jawt.dll (part of JRE) here explicitly because
+			// the FlatLaf native library flatlaf.dll may be loaded very early on Windows
+			// (e.g. from class com.formdev.flatlaf.util.SystemInfo) and before AWT is
+			// initialized (and awt.dll is loaded). Loading jawt.dll also loads awt.dll.
+			// In Java 8, loading jawt.dll before AWT is initialized may load
+			// a wrong version of awt.dll if a newer Java version (e.g. 19)
+			// is in PATH environment variable. Then Java 19 awt.dll and Java 8 awt.dll
+			// are loaded at same time and calling JAWT_GetAWT() crashes the application.
+			//
+			// To avoid this, flatlaf.dll is not linked to jawt.dll,
+			// which avoids loading jawt.dll when flatlaf.dll is loaded.
+			// Instead, flatlaf.dll dynamically loads jawt.dll when first used,
+			// which is guaranteed after AWT initialization.
 
-			classifier = "linux-x86_64";
+		} else if( SystemInfo.isMacOS_10_14_Mojave_orLater && (SystemInfo.isAARCH64 || SystemInfo.isX86_64) ) {
+			// macOS: requires macOS 10.14 or later (arm64 or x86_64)
+
+			classifier = SystemInfo.isAARCH64 ? "macos-arm64" : "macos-x86_64";
+			ext = "dylib";
+
+		} else if( SystemInfo.isLinux ) {
+			// Linux: x86_64 or aarch64 (but also supports unknown architectures)
+
+			classifier = SystemInfo.isAARCH64 ? "linux-arm64"
+				: (SystemInfo.isX86_64 ? "linux-x86_64"
+					: "linux-" + sanitize( System.getProperty( "os.arch" ) ));
 			ext = "so";
+			unknownArch = !SystemInfo.isX86_64 && !SystemInfo.isAARCH64;
 
 			// Load libjawt.so (part of JRE) explicitly because it is not found
 			// in all Java versions/distributions.
@@ -79,10 +110,29 @@ class FlatNativeLibrary
 			return; // no native library available for current OS or CPU architecture
 
 		// load native library
-		nativeLibrary = createNativeLibrary( classifier, ext );
+		NativeLibrary nativeLibrary = createNativeLibrary( classifier, ext, unknownArch );
+		if( !nativeLibrary.isLoaded() )
+			return;
+
+		// check API version (and check whether library works)
+		try {
+			int actualApiVersion = getApiVersion();
+			if( actualApiVersion != apiVersion ) {
+				LoggingFacade.INSTANCE.logSevere( "FlatLaf: Wrong API version in native library (expected "
+					+ apiVersion + ", actual " + actualApiVersion + "). Ignoring native library.", null );
+				return;
+			}
+		} catch( Throwable ex ) {
+			// could be a UnsatisfiedLinkError in case that loading native library
+			// from temp directory was blocked by some OS security mechanism
+			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to get API version of native library. Ignoring native library.", ex );
+			return;
+		}
+
+		FlatNativeLibrary.nativeLibrary = nativeLibrary;
 	}
 
-	private static NativeLibrary createNativeLibrary( String classifier, String ext ) {
+	private static NativeLibrary createNativeLibrary( String classifier, String ext, boolean unknownArch ) {
 		String libraryName = "flatlaf-" + classifier;
 
 		// load from "java.library.path" or from path specified in system property "flatlaf.nativeLibraryPath"
@@ -93,13 +143,36 @@ class FlatNativeLibrary
 				if( library.isLoaded() )
 					return library;
 
-				LoggingFacade.INSTANCE.logSevere( "Did not find library " + libraryName + " in java.library.path, using extracted library instead", null );
+				if( !unknownArch ) {
+					LoggingFacade.INSTANCE.logSevere( "FlatLaf: Native library '" + System.mapLibraryName( libraryName )
+						+ "' not found in java.library.path '" + System.getProperty( "java.library.path" )
+						+ "'. Using extracted native library instead.", null );
+				}
 			} else {
+				// try standard library naming scheme
+				// (same as in flatlaf.jar in package 'com/formdev/flatlaf/natives')
 				File libraryFile = new File( libraryPath, System.mapLibraryName( libraryName ) );
 				if( libraryFile.exists() )
 					return new NativeLibrary( libraryFile, true );
 
-				LoggingFacade.INSTANCE.logSevere( "Did not find external library " + libraryFile + ", using extracted library instead", null );
+				// try Maven naming scheme
+				// (see https://www.formdev.com/flatlaf/native-libraries/)
+				String libraryName2 = null;
+				File jarFile = getJarFile();
+				if( jarFile != null ) {
+					libraryName2 = buildLibraryName( jarFile, classifier, ext );
+					File libraryFile2 = new File( libraryPath, libraryName2 );
+					if( libraryFile2.exists() )
+						return new NativeLibrary( libraryFile2, true );
+				}
+
+				if( !unknownArch ) {
+					LoggingFacade.INSTANCE.logSevere( "FlatLaf: Native library '"
+						+ libraryFile.getName()
+						+ (libraryName2 != null ? ("' or '" + libraryName2) : "")
+						+ "' not found in '" + libraryFile.getParentFile().getAbsolutePath()
+						+ "'. Using extracted native library instead.", null );
+				}
 			}
 		}
 
@@ -110,7 +183,7 @@ class FlatNativeLibrary
 			return new NativeLibrary( libraryFile, true );
 
 		// load from FlatLaf jar (extract native library to temp folder)
-		return new NativeLibrary( "com/formdev/flatlaf/natives/" + libraryName, null, true );
+		return new NativeLibrary( "com/formdev/flatlaf/natives/" + libraryName, null, !unknownArch );
 	}
 
 	/**
@@ -127,6 +200,51 @@ class FlatNativeLibrary
 	 *     flatlaf-3.1-linux-x86_64.so
 	 */
 	private static File findLibraryBesideJar( String classifier, String ext ) {
+		// get location of FlatLaf jar (or fat/uber application jar)
+		File jarFile = getJarFile();
+		if( jarFile == null )
+			return null;
+
+		// build library file
+		String libraryName = buildLibraryName( jarFile, classifier, ext );
+		File jarDir = jarFile.getParentFile();
+
+		// check whether native library exists in same directory as jar
+		File libraryFile = new File( jarDir, libraryName );
+		if( libraryFile.isFile() )
+			return libraryFile;
+
+		// if jar is in "lib" directory, then also check whether native library exists
+		// in "../bin" directory
+		if( jarDir.getName().equalsIgnoreCase( "lib" ) ) {
+			libraryFile = new File( jarDir.getParentFile(), "bin/" + libraryName );
+			if( libraryFile.isFile() )
+				return libraryFile;
+		}
+
+		// special case: support Gradle cache when running in development environment
+		//   <user-home>/.gradle/caches/modules-2/files-2.1/com.formdev/flatlaf/<version>/<hash-1>/flatlaf-<version>.jar
+		//   <user-home>/.gradle/caches/modules-2/files-2.1/com.formdev/flatlaf/<version>/<hash-2>/flatlaf-<version>-windows-x86_64.dll
+		String path = jarDir.getAbsolutePath().replace( '\\', '/' );
+		if( path.contains( "/.gradle/caches/" ) ) {
+			File versionDir = jarDir.getParentFile();
+			if( libraryName.contains( versionDir.getName() ) ) {
+				File[] dirs = versionDir.listFiles();
+				if( dirs != null ) {
+					for( File dir : dirs ) {
+						libraryFile = new File( dir, libraryName );
+						if( libraryFile.isFile() )
+							return libraryFile;
+					}
+				}
+			}
+		}
+
+		// native library not found
+		return null;
+	}
+
+	private static File getJarFile() {
 		try {
 			// get location of FlatLaf jar
 			CodeSource codeSource = FlatNativeLibrary.class.getProtectionDomain().getCodeSource();
@@ -144,31 +262,30 @@ class FlatNativeLibrary
 			if( !jarFile.isFile() )
 				return null;
 
-			// build library file
-			String jarName = jarFile.getName();
-			String jarBasename = jarName.substring( 0, jarName.lastIndexOf( '.' ) );
-			File parent = jarFile.getParentFile();
-			String libraryName = jarBasename
-				+ (jarBasename.contains( "flatlaf" ) ? "" : "-flatlaf")
-				+ '-' + classifier + '.' + ext;
-
-			// check whether native library exists in same directory as jar
-			File libraryFile = new File( parent, libraryName );
-			if( libraryFile.isFile() )
-				return libraryFile;
-
-			// if jar is in "lib" directory, then also check whether library exists
-			// in "../bin" directory
-			if( parent.getName().equalsIgnoreCase( "lib" ) ) {
-				libraryFile = new File( parent.getParentFile(), "bin/" + libraryName );
-				if( libraryFile.isFile() )
-					return libraryFile;
-			}
+			return jarFile;
 		} catch( Exception ex ) {
 			LoggingFacade.INSTANCE.logSevere( ex.getMessage(), ex );
+			return null;
 		}
+	}
 
-		return null;
+	private static String buildLibraryName( File jarFile, String classifier, String ext ) {
+		String jarName = jarFile.getName();
+		String jarBasename = jarName.substring( 0, jarName.lastIndexOf( '.' ) );
+
+		// remove classifier "no-natives" (if used)
+		jarBasename = StringUtils.removeTrailing( jarBasename, "-no-natives" );
+
+		return jarBasename
+			+ (jarBasename.contains( "flatlaf" ) ? "" : "-flatlaf")
+			+ '-' + classifier + '.' + ext;
+	}
+
+	/**
+	 * Allow only 'a'-'z', 'A'-'Z', '0'-'9', '_' and '-' in filenames.
+	 */
+	private static String sanitize( String s ) {
+		return s.replaceAll( "[^a-zA-Z0-9_-]", "_" );
 	}
 
 	private static void loadJAWT() {

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeLinuxLibrary.java

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.GraphicsConfiguration;
 import java.awt.Point;
 import java.awt.Toolkit;
 import java.awt.Window;
@@ -23,6 +24,7 @@ import java.awt.event.MouseEvent;
 import java.awt.geom.AffineTransform;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
+import javax.swing.JOptionPane;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -33,15 +35,35 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @author Karl Tauber
  * @since 2.5
  */
-class FlatNativeLinuxLibrary
+public class FlatNativeLinuxLibrary
 {
-	static boolean isLoaded() {
-		return SystemInfo.isLinux && FlatNativeLibrary.isLoaded();
+	private static int API_VERSION_LINUX = 3002;
+
+	/**
+	 * Checks whether native library is loaded/available.
+	 * <p>
+	 * <b>Note</b>: It is required to invoke this method before invoking any other
+	 *              method of this class. Otherwise, the native library may not be loaded.
+	 */
+	public static boolean isLoaded() {
+		return SystemInfo.isLinux && FlatNativeLibrary.isLoaded( API_VERSION_LINUX );
 	}
 
+
+	//---- X Window System ----------------------------------------------------
+
 	// direction for _NET_WM_MOVERESIZE message
-	// see https://specifications.freedesktop.org/wm-spec/wm-spec-latest.html
-	static final int MOVE = 8;
+	// see https://specifications.freedesktop.org/wm-spec/latest/ar01s04.html
+	static final int
+		SIZE_TOPLEFT     = 0,
+		SIZE_TOP         = 1,
+		SIZE_TOPRIGHT    = 2,
+		SIZE_RIGHT       = 3,
+		SIZE_BOTTOMRIGHT = 4,
+		SIZE_BOTTOM      = 5,
+		SIZE_BOTTOMLEFT  = 6,
+		SIZE_LEFT        = 7,
+		MOVE             = 8;
 
 	private static Boolean isXWindowSystem;
 
@@ -88,7 +110,11 @@ class FlatNativeLinuxLibrary
 	}
 
 	private static Point scale( Window window, Point pt ) {
-		AffineTransform transform = window.getGraphicsConfiguration().getDefaultTransform();
+		GraphicsConfiguration gc = window.getGraphicsConfiguration();
+		if( gc == null )
+			return pt;
+
+		AffineTransform transform = gc.getDefaultTransform();
 		int x = (int) Math.round( pt.x * transform.getScaleX() );
 		int y = (int) Math.round( pt.y * transform.getScaleY() );
 		return new Point( x, y );
@@ -102,4 +128,109 @@ class FlatNativeLinuxLibrary
 		return (window instanceof JFrame && JFrame.isDefaultLookAndFeelDecorated() && ((JFrame)window).isUndecorated()) ||
 			(window instanceof JDialog && JDialog.isDefaultLookAndFeelDecorated() && ((JDialog)window).isUndecorated());
 	}
+
+
+	//---- GTK ----------------------------------------------------------------
+
+	private static Boolean isGtk3Available;
+
+	/**
+	 * Checks whether GTK 3 is available.
+	 * Use this before invoking any native method that uses GTK.
+	 * Otherwise the app may terminate immediately if GTK is not installed.
+	 * <p>
+	 * This works because Java uses {@code dlopen(RTLD_LAZY)} to load JNI libraries,
+	 * which only resolves symbols as the code that references them is executed.
+	 *
+	 * @since 3.7
+	 */
+	public static boolean isGtk3Available() {
+		if( isGtk3Available == null )
+			isGtk3Available = isLibAvailable( "libgtk-3.so.0" ) || isLibAvailable( "libgtk-3.so" );
+		return isGtk3Available;
+	}
+
+	private native static boolean isLibAvailable( String libname );
+
+	/**
+	 * https://docs.gtk.org/gtk3/iface.FileChooser.html#properties
+	 *
+	 * @since 3.7
+	 */
+	public static final int
+		FC_select_folder					= 1 << 0,
+		FC_select_multiple					= 1 << 1,
+		FC_show_hidden						= 1 << 2,
+		FC_local_only						= 1 << 3,  // default
+		FC_do_overwrite_confirmation		= 1 << 4,  // GTK 3 only; removed and always-on in GTK 4
+		FC_create_folders					= 1 << 5;  // default for Save
+
+	/**
+	 * Shows the Linux/GTK system file dialog
+	 * <a href="https://docs.gtk.org/gtk3/class.FileChooserDialog.html">GtkFileChooserDialog</a>.
+	 * <p>
+	 * Uses {@code GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER} if {@link #FC_select_folder} is set in parameter {@code optionsSet}.
+	 * Otherwise uses {@code GTK_FILE_CHOOSER_ACTION_OPEN} if parameter {@code open} is {@code true},
+	 * or {@code GTK_FILE_CHOOSER_ACTION_SAVE} if {@code false}.
+	 * <p>
+	 * <b>Note:</b> This method blocks the current thread until the user closes
+	 * the file dialog. It is highly recommended to invoke it from a new thread
+	 * to avoid blocking the AWT event dispatching thread.
+	 *
+	 * @param owner the owner of the file dialog; or {@code null}
+	 * @param open if {@code true}, shows the open dialog; if {@code false}, shows the save dialog
+	 * @param title text displayed in dialog title; or {@code null}
+	 * @param okButtonLabel text displayed in default button; or {@code null}.
+	 *        Use '_' for mnemonics (e.g. "_Choose")
+	 *        Use '__' for '_' character (e.g. "Choose__and__Quit").
+	 * @param currentName user-editable filename currently shown in the filename field in save dialog; or {@code null}
+	 * @param currentFolder current directory shown in the dialog; or {@code null}
+	 * @param optionsSet options to set; see {@code FOS_*} constants
+	 * @param optionsClear options to clear; see {@code FOS_*} constants
+	 * @param callback approve callback; or {@code null}
+	 * @param fileTypeIndex the file type that appears as selected (zero-based)
+	 * @param fileTypes file types that the dialog can open or save.
+	 *        Two or more strings and {@code null} are required for each filter.
+	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
+	 *        Subsequent strings are the filter patterns (e.g. "*.txt" or "*").
+	 *        {@code null} is required to mark end of filter.
+	 * @return file path(s) that the user selected; an empty array if canceled;
+	 *         or {@code null} on failures (no dialog shown)
+	 *
+	 * @since 3.7
+	 */
+	public native static String[] showFileChooser( Window owner, boolean open,
+		String title, String okButtonLabel, String currentName, String currentFolder,
+		int optionsSet, int optionsClear, FileChooserCallback callback,
+		int fileTypeIndex, String... fileTypes );
+
+	/** @since 3.7 */
+	public interface FileChooserCallback {
+		boolean approve( String[] files, long hwndFileDialog );
+	}
+
+	/**
+	 * Shows a GTK message box
+	 * <a href="https://docs.gtk.org/gtk3/class.MessageDialog.html">GtkMessageDialog</a>.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param messageType type of message being displayed:
+	 *        {@link JOptionPane#ERROR_MESSAGE}, {@link JOptionPane#INFORMATION_MESSAGE},
+	 *        {@link JOptionPane#WARNING_MESSAGE}, {@link JOptionPane#QUESTION_MESSAGE} or
+	 *        {@link JOptionPane#PLAIN_MESSAGE}
+	 * @param primaryText primary text; if the dialog has a secondary text,
+	 *        this will appear as title in a larger bold font
+	 * @param secondaryText secondary text; shown below of primary text; or {@code null}
+	 * @param defaultButton index of the default button, which can be pressed using ENTER key
+	 * @param buttons texts of the buttons; if no buttons given the a default "OK" button is shown.
+	 *        Use '_' for mnemonics (e.g. "_Choose")
+	 *        Use '__' for '_' character (e.g. "Choose__and__Quit").
+	 * @return index of pressed button; or -1 for ESC key
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageDialog( long hwndParent, int messageType,
+		String primaryText, String secondaryText, int defaultButton, String... buttons );
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeMacLibrary.java

@@ -0,0 +1,156 @@
+/*
+ * Copyright 2023 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Rectangle;
+import java.awt.Window;
+import javax.swing.JOptionPane;
+import com.formdev.flatlaf.util.SystemInfo;
+
+/**
+ * Native methods for macOS.
+ * <p>
+ * <b>Note</b>: This is private API. Do not use!
+ *
+ * <h2>Methods that use windows as parameter</h2>
+ *
+ * For all methods that accept a {@link java.awt.Window} as parameter,
+ * the underlying macOS window must be already created,
+ * otherwise the method fails. You can use following to ensure this:
+ * <pre>{@code
+ * if( !window.isDisplayable() )
+ *     window.addNotify();
+ * }</pre>
+ * or invoke the method after packing the window. E.g.
+ * <pre>{@code
+ * window.pack();
+ * }</pre>
+ *
+ * @author Karl Tauber
+ * @since 3.3
+ */
+public class FlatNativeMacLibrary
+{
+	private static int API_VERSION_MACOS = 2002;
+
+	/**
+	 * Checks whether native library is loaded/available.
+	 * <p>
+	 * <b>Note</b>: It is required to invoke this method before invoking any other
+	 *              method of this class. Otherwise, the native library may not be loaded.
+	 */
+	public static boolean isLoaded() {
+		return SystemInfo.isMacOS && FlatNativeLibrary.isLoaded( API_VERSION_MACOS );
+	}
+
+	public native static boolean setWindowRoundedBorder( Window window, float radius, float borderWidth, int borderColor );
+
+	/** @since 3.4 */
+	public static final int
+		BUTTONS_SPACING_DEFAULT = 0,
+		BUTTONS_SPACING_MEDIUM = 1,
+		BUTTONS_SPACING_LARGE = 2;
+
+	/** @since 3.4 */ public native static boolean setWindowButtonsSpacing( Window window, int buttonsSpacing );
+	/** @since 3.4 */ public native static Rectangle getWindowButtonsBounds( Window window );
+	/** @since 3.4 */ public native static boolean isWindowFullScreen( Window window );
+	/** @since 3.4 */ public native static boolean toggleWindowFullScreen( Window window );
+
+
+	/** @since 3.7 */
+	public static final int
+		// NSOpenPanel (extends NSSavePanel)
+		FC_canChooseFiles					= 1 << 0,  // default
+		FC_canChooseDirectories				= 1 << 1,
+		FC_resolvesAliases					= 1 << 2,  // default
+		FC_allowsMultipleSelection			= 1 << 3,
+		FC_accessoryViewDisclosed			= 1 << 4,
+		// NSSavePanel
+		FC_showsTagField					= 1 << 8,  // default for Save
+		FC_canCreateDirectories				= 1 << 9,  // default for Save
+		FC_canSelectHiddenExtension			= 1 << 10,
+		FC_showsHiddenFiles					= 1 << 11,
+		FC_extensionHidden					= 1 << 12,
+		FC_allowsOtherFileTypes				= 1 << 13,
+		FC_treatsFilePackagesAsDirectories	= 1 << 14,
+		// custom
+		FC_showSingleFilterField			= 1 << 24;
+
+	/**
+	 * Shows the macOS system file dialogs
+	 * <a href="https://developer.apple.com/documentation/appkit/nsopenpanel?language=objc">NSOpenPanel</a> or
+	 * <a href="https://developer.apple.com/documentation/appkit/nssavepanel?language=objc">NSSavePanel</a>.
+	 * <p>
+	 * <b>Note:</b> This method blocks the current thread until the user closes
+	 * the file dialog. It is highly recommended to invoke it from a new thread
+	 * to avoid blocking the AWT event dispatching thread.
+	 *
+	 * @param owner the owner of the file dialog; or {@code null}
+	 * @param dark appearance of the file dialog: {@code 1} = dark, {@code 0} = light, {@code -1} = default
+	 * @param open if {@code true}, shows the open dialog; if {@code false}, shows the save dialog
+	 * @param title text displayed at top of save dialog (not used in open dialog); or {@code null}
+	 * @param prompt text displayed in default button; or {@code null}
+	 * @param message text displayed at top of open/save dialogs; or {@code null}
+	 * @param filterFieldLabel text displayed in front of the filter combobox; or {@code null}
+	 * @param nameFieldLabel text displayed in front of the filename text field in save dialog (not used in open dialog); or {@code null}
+	 * @param nameFieldStringValue user-editable filename currently shown in the name field in save dialog (not used in open dialog); or {@code null}
+	 * @param directoryURL current directory shown in the dialog; or {@code null}
+	 * @param optionsSet options to set; see {@code FC_*} constants
+	 * @param optionsClear options to clear; see {@code FC_*} constants
+	 * @param fileTypeIndex the file type that appears as selected (zero-based)
+	 * @param fileTypes file types that the dialog can open or save.
+	 *        Two or more strings and {@code null} are required for each filter.
+	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
+	 *        Subsequent strings are the filter patterns (e.g. "txt" or "*").
+	 *        {@code null} is required to mark end of filter.
+	 * @return file path(s) that the user selected; an empty array if canceled;
+	 *         or {@code null} on failures (no dialog shown)
+	 *
+	 * @since 3.7
+	 */
+	public native static String[] showFileChooser( Window owner, int dark, boolean open,
+		String title, String prompt, String message, String filterFieldLabel,
+		String nameFieldLabel, String nameFieldStringValue, String directoryURL,
+		int optionsSet, int optionsClear, FileChooserCallback callback,
+		int fileTypeIndex, String... fileTypes );
+
+	/** @since 3.7 */
+	public interface FileChooserCallback {
+		boolean approve( String[] files, long hwndFileDialog );
+	}
+
+	/**
+	 * Shows a macOS alert
+	 * <a href="https://developer.apple.com/documentation/appkit/nsalert?language=objc">NSAlert</a>.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param alertStyle type of alert being displayed:
+	 *        {@link JOptionPane#ERROR_MESSAGE}, {@link JOptionPane#INFORMATION_MESSAGE} or
+	 *        {@link JOptionPane#WARNING_MESSAGE}
+	 * @param messageText main message of the alert
+	 * @param informativeText additional information about the alert; shown below of main message; or {@code null}
+	 * @param defaultButton index of the default button, which can be pressed using ENTER key
+	 * @param buttons texts of the buttons; if no buttons given the a default "OK" button is shown
+	 * @return index of pressed button
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageDialog( long hwndParent, int alertStyle,
+		String messageText, String informativeText, int defaultButton, String... buttons );
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeWindowBorder.java

@@ -17,20 +17,27 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.Container;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Point;
 import java.awt.Rectangle;
+import java.awt.Toolkit;
 import java.awt.Window;
 import java.beans.PropertyChangeListener;
-import java.util.List;
+import java.util.function.Predicate;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
 import javax.swing.JRootPane;
+import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.event.ChangeListener;
+import javax.swing.plaf.BorderUIResource;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.FlatSystemProperties;
-import com.formdev.flatlaf.ui.JBRCustomDecorations.JBRWindowTopBorder;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -54,27 +61,15 @@ public class FlatNativeWindowBorder
 		!SystemInfo.isWinPE &&
 		FlatSystemProperties.getBoolean( FlatSystemProperties.USE_WINDOW_DECORATIONS, true );
 
-	// check this field before using class JBRCustomDecorations to avoid unnecessary loading of that class
-	private static final boolean canUseJBRCustomDecorations =
-		canUseWindowDecorations &&
-		SystemInfo.isJetBrainsJVM_11_orLater &&
-		FlatSystemProperties.getBoolean( FlatSystemProperties.USE_JETBRAINS_CUSTOM_DECORATIONS, false );
-
 	private static Boolean supported;
 	private static Provider nativeProvider;
 
 	public static boolean isSupported() {
-		if( canUseJBRCustomDecorations )
-			return JBRCustomDecorations.isSupported();
-
 		initialize();
 		return supported;
 	}
 
 	static Object install( JRootPane rootPane ) {
-		if( canUseJBRCustomDecorations )
-			return JBRCustomDecorations.install( rootPane );
-
 		if( !isSupported() )
 			return null;
 
@@ -163,11 +158,6 @@ public class FlatNativeWindowBorder
 	}
 
 	static void uninstall( JRootPane rootPane, Object data ) {
-		if( canUseJBRCustomDecorations ) {
-			JBRCustomDecorations.uninstall( rootPane, data );
-			return;
-		}
-
 		if( !isSupported() )
 			return;
 
@@ -215,9 +205,6 @@ public class FlatNativeWindowBorder
 	}
 
 	public static boolean hasCustomDecoration( Window window ) {
-		if( canUseJBRCustomDecorations )
-			return JBRCustomDecorations.hasCustomDecoration( window );
-
 		if( !isSupported() )
 			return false;
 
@@ -225,11 +212,6 @@ public class FlatNativeWindowBorder
 	}
 
 	public static void setHasCustomDecoration( Window window, boolean hasCustomDecoration ) {
-		if( canUseJBRCustomDecorations ) {
-			JBRCustomDecorations.setHasCustomDecoration( window, hasCustomDecoration );
-			return;
-		}
-
 		if( !isSupported() )
 			return;
 
@@ -237,23 +219,18 @@ public class FlatNativeWindowBorder
 	}
 
 	static void setTitleBarHeightAndHitTestSpots( Window window, int titleBarHeight,
-		List<Rectangle> hitTestSpots, Rectangle appIconBounds, Rectangle minimizeButtonBounds,
+		Predicate<Point> captionHitTestCallback, Rectangle appIconBounds, Rectangle minimizeButtonBounds,
 		Rectangle maximizeButtonBounds, Rectangle closeButtonBounds )
 	{
-		if( canUseJBRCustomDecorations ) {
-			JBRCustomDecorations.setTitleBarHeightAndHitTestSpots( window, titleBarHeight, hitTestSpots );
-			return;
-		}
-
 		if( !isSupported() )
 			return;
 
-		nativeProvider.updateTitleBarInfo( window, titleBarHeight, hitTestSpots,
+		nativeProvider.updateTitleBarInfo( window, titleBarHeight, captionHitTestCallback,
 			appIconBounds, minimizeButtonBounds, maximizeButtonBounds, closeButtonBounds );
 	}
 
 	static boolean showWindow( Window window, int cmd ) {
-		if( canUseJBRCustomDecorations || !isSupported() )
+		if( !isSupported() )
 			return false;
 
 		return nativeProvider.showWindow( window, cmd );
@@ -294,7 +271,7 @@ public class FlatNativeWindowBorder
 	{
 		boolean hasCustomDecoration( Window window );
 		void setHasCustomDecoration( Window window, boolean hasCustomDecoration );
-		void updateTitleBarInfo( Window window, int titleBarHeight, List<Rectangle> hitTestSpots,
+		void updateTitleBarInfo( Window window, int titleBarHeight, Predicate<Point> captionHitTestCallback,
 			Rectangle appIconBounds, Rectangle minimizeButtonBounds, Rectangle maximizeButtonBounds,
 			Rectangle closeButtonBounds );
 
@@ -320,20 +297,36 @@ public class FlatNativeWindowBorder
 	 * No longer needed since Windows 11.
 	 */
 	static class WindowTopBorder
-		extends JBRCustomDecorations.JBRWindowTopBorder
+		extends BorderUIResource.EmptyBorderUIResource
 	{
 		private static WindowTopBorder instance;
 
-		static JBRWindowTopBorder getInstance() {
-			if( canUseJBRCustomDecorations )
-				return JBRWindowTopBorder.getInstance();
+		private final Color activeLightColor = new Color( 0x707070 );
+		private final Color activeDarkColor = new Color( 0x2D2E2F );
+		private final Color inactiveLightColor = new Color( 0xaaaaaa );
+		private final Color inactiveDarkColor = new Color( 0x494A4B );
 
+		private boolean colorizationAffectsBorders;
+		private Color activeColor;
+
+		static WindowTopBorder getInstance() {
 			if( instance == null )
 				instance = new WindowTopBorder();
 			return instance;
 		}
 
-		@Override
+		WindowTopBorder() {
+			super( 1, 0, 0, 0 );
+
+			update();
+			installListeners();
+        }
+
+        void update() {
+			colorizationAffectsBorders = isColorizationColorAffectsBorders();
+			activeColor = calculateActiveBorderColor();
+		}
+
 		void installListeners() {
 			nativeProvider.addChangeListener( e -> {
 				update();
@@ -346,19 +339,69 @@ public class FlatNativeWindowBorder
 			} );
 		}
 
-		@Override
 		boolean isColorizationColorAffectsBorders() {
 			return nativeProvider.isColorizationColorAffectsBorders();
 		}
 
-		@Override
 		Color getColorizationColor() {
 			return nativeProvider.getColorizationColor();
 		}
 
-		@Override
 		int getColorizationColorBalance() {
 			return nativeProvider.getColorizationColorBalance();
 		}
+
+		private Color calculateActiveBorderColor() {
+			if( !colorizationAffectsBorders )
+				return null;
+
+			Color colorizationColor = getColorizationColor();
+			if( colorizationColor != null ) {
+				int colorizationColorBalance = getColorizationColorBalance();
+				if( colorizationColorBalance < 0 || colorizationColorBalance > 100 )
+					colorizationColorBalance = 100;
+
+				if( colorizationColorBalance == 0 )
+					return new Color( 0xD9D9D9 );
+				if( colorizationColorBalance == 100 )
+					return colorizationColor;
+
+				float alpha = colorizationColorBalance / 100.0f;
+				float remainder = 1 - alpha;
+				int r = Math.round( colorizationColor.getRed() * alpha + 0xD9 * remainder );
+				int g = Math.round( colorizationColor.getGreen() * alpha + 0xD9 * remainder );
+				int b = Math.round( colorizationColor.getBlue() * alpha + 0xD9 * remainder );
+
+				// avoid potential IllegalArgumentException in Color constructor
+				r = Math.min( Math.max( r, 0 ), 255 );
+				g = Math.min( Math.max( g, 0 ), 255 );
+				b = Math.min( Math.max( b, 0 ), 255 );
+
+				return new Color( r, g, b );
+			}
+
+			Color activeBorderColor = (Color) Toolkit.getDefaultToolkit().getDesktopProperty( "win.frame.activeBorderColor" );
+			return (activeBorderColor != null) ? activeBorderColor : UIManager.getColor( "MenuBar.borderColor" );
+		}
+
+		@Override
+		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+			Window window = SwingUtilities.windowForComponent( c );
+			boolean active = window != null && window.isActive();
+			boolean dark = FlatLaf.isLafDark();
+
+			g.setColor( active
+				? (activeColor != null ? activeColor : (dark ? activeDarkColor : activeLightColor))
+				: (dark ? inactiveDarkColor : inactiveLightColor) );
+			HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, width, height, this::paintImpl );
+		}
+
+		private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+			g.fillRect( x, y, width, 1 );
+		}
+
+		void repaintBorder( Component c ) {
+			c.repaint( 0, 0, c.getWidth(), 1 );
+		}
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeWindowsLibrary.java

@@ -16,7 +16,9 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.Color;
 import java.awt.Window;
+import javax.swing.JOptionPane;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -29,10 +31,18 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeWindowsLibrary
 {
+	private static int API_VERSION_WINDOWS = 1002;
+
 	private static long osBuildNumber = Long.MIN_VALUE;
 
+	/**
+	 * Checks whether native library is loaded/available.
+	 * <p>
+	 * <b>Note</b>: It is required to invoke this method before invoking any other
+	 *              method of this class. Otherwise, the native library may not be loaded.
+	 */
 	public static boolean isLoaded() {
-		return SystemInfo.isWindows && FlatNativeLibrary.isLoaded();
+		return SystemInfo.isWindows && FlatNativeLibrary.isLoaded( API_VERSION_WINDOWS );
 	}
 
 	/**
@@ -93,15 +103,181 @@ public class FlatNativeWindowsLibrary
 	public native static boolean setWindowCornerPreference( long hwnd, int cornerPreference );
 
 	/**
-	 * Sets the color of the window border.
-	 * The red/green/blue values must be in range {@code 0 - 255}.
-	 * If red is {@code -1}, then the system default border color is used (useful to reset the border color).
-	 * If red is {@code -2}, then no border is painted.
-	 * <p>
-	 * Invokes Win32 API method {@code DwmSetWindowAttribute(DWMWA_BORDER_COLOR)}.
+	 * DWMWINDOWATTRIBUTE
+	 * see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
+	 *
+	 * @since 3.3
+	 */
+	public static final int
+		DWMWA_USE_IMMERSIVE_DARK_MODE = 20,
+		DWMWA_BORDER_COLOR = 34,
+		DWMWA_CAPTION_COLOR = 35,
+		DWMWA_TEXT_COLOR = 36;
+
+	/**
+	 * Invokes Win32 API method {@code DwmSetWindowAttribute()} with a {@code BOOL} attribute value.
+	 * See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
+	 *
+	 * @since 3.3
+	 */
+	public native static boolean dwmSetWindowAttributeBOOL( long hwnd, int attribute, boolean value );
+
+	/**
+	 * Invokes Win32 API method {@code DwmSetWindowAttribute()} with a {@code DWORD} attribute value.
+	 * See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
+	 *
+	 * @since 3.3
+	 */
+	public native static boolean dwmSetWindowAttributeDWORD( long hwnd, int attribute, int value );
+
+	/** @since 3.3 */
+	public static final int
+		// use this constant to reset any window part colors to the system default behavior
+		DWMWA_COLOR_DEFAULT = 0xFFFFFFFF,
+		// use this constant to specify that a window part should not be rendered
+		DWMWA_COLOR_NONE = 0xFFFFFFFE;
+
+	/** @since 3.3 */
+	public static final Color COLOR_NONE = new Color( 0, true );
+
+	/**
+	 * Invokes Win32 API method {@code DwmSetWindowAttribute()} with a {@code COLORREF} attribute value.
 	 * See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
 	 * <p>
 	 * Supported since Windows 11 Build 22000.
+	 *
+	 * @since 3.3
 	 */
-	public native static boolean setWindowBorderColor( long hwnd, int red, int green, int blue );
+	public static boolean dwmSetWindowAttributeCOLORREF( long hwnd, int attribute, Color color ) {
+		// convert color to Windows RGB value
+		int rgb = (color == COLOR_NONE)
+			? DWMWA_COLOR_NONE
+			: (color != null
+				? (color.getRed() | (color.getGreen() << 8) | (color.getBlue() << 16))
+				: DWMWA_COLOR_DEFAULT);
+
+		// DwmSetWindowAttribute() expects COLORREF as attribute value, which is defined as DWORD
+		return dwmSetWindowAttributeDWORD( hwnd, attribute, rgb );
+	}
+
+
+	/**
+	 * FILEOPENDIALOGOPTIONS
+	 * see https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/ne-shobjidl_core-_fileopendialogoptions
+	 *
+	 * @since 3.7
+	 */
+	public static final int
+		FOS_OVERWRITEPROMPT = 0x2,		// default for Save
+		FOS_STRICTFILETYPES = 0x4,
+		FOS_NOCHANGEDIR = 0x8,			// default
+		FOS_PICKFOLDERS = 0x20,
+		FOS_FORCEFILESYSTEM = 0x40,
+		FOS_ALLNONSTORAGEITEMS = 0x80,
+		FOS_NOVALIDATE = 0x100,
+		FOS_ALLOWMULTISELECT = 0x200,
+		FOS_PATHMUSTEXIST = 0x800,		// default
+		FOS_FILEMUSTEXIST = 0x1000,		// default for Open
+		FOS_CREATEPROMPT = 0x2000,
+		FOS_SHAREAWARE = 0x4000,
+		FOS_NOREADONLYRETURN = 0x8000,	// default for Save
+		FOS_NOTESTFILECREATE = 0x10000,
+		FOS_HIDEMRUPLACES = 0x20000,
+		FOS_HIDEPINNEDPLACES = 0x40000,
+		FOS_NODEREFERENCELINKS = 0x100000,
+		FOS_OKBUTTONNEEDSINTERACTION = 0x200000,
+		FOS_DONTADDTORECENT = 0x2000000,
+		FOS_FORCESHOWHIDDEN = 0x10000000,
+		FOS_DEFAULTNOMINIMODE = 0x20000000,
+		FOS_FORCEPREVIEWPANEON = 0x40000000,
+		FOS_SUPPORTSTREAMABLEITEMS = 0x80000000;
+
+	/**
+	 * Shows the Windows system
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/shell/common-file-dialog">file dialogs</a>
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-ifileopendialog">IFileOpenDialog</a> or
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-ifilesavedialog">IFileSaveDialog</a>.
+	 * <p>
+	 * <b>Note:</b> This method blocks the current thread until the user closes
+	 * the file dialog. It is highly recommended to invoke it from a new thread
+	 * to avoid blocking the AWT event dispatching thread.
+	 *
+	 * @param owner the owner of the file dialog; or {@code null}
+	 * @param open if {@code true}, shows the open dialog; if {@code false}, shows the save dialog
+	 * @param title text displayed in dialog title; or {@code null}
+	 * @param okButtonLabel text displayed in default button; or {@code null}.
+	 *        Use '&amp;' for mnemonics (e.g. "&amp;Choose").
+	 *        Use '&amp;&amp;' for '&amp;' character (e.g. "Choose &amp;&amp; Quit").
+	 * @param fileNameLabel text displayed in front of the filename text field; or {@code null}
+	 * @param fileName user-editable filename currently shown in the filename field; or {@code null}
+	 * @param folder current directory shown in the dialog; or {@code null}
+	 * @param saveAsItem file to be used as the initial entry in a Save As dialog; or {@code null}.
+	 *        File name is shown in filename text field, folder is selected in view.
+	 *        To be used for saving files that already exist. For new files use {@code fileName}.
+	 * @param defaultFolder folder used as a default if there is not a recently used folder value available; or {@code null}.
+	 *        Windows somewhere stores default folder on a per-app basis.
+	 *        So this is probably used only once when the app opens a file dialog for first time.
+	 * @param defaultExtension default extension to be added to file name in save dialog; or {@code null}
+	 * @param optionsSet options to set; see {@code FOS_*} constants
+	 * @param optionsClear options to clear; see {@code FOS_*} constants
+	 * @param callback approve callback; or {@code null}
+	 * @param fileTypeIndex the file type that appears as selected (zero-based)
+	 * @param fileTypes file types that the dialog can open or save.
+	 *        Pairs of strings are required for each filter.
+	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
+	 *        Second string is the filter pattern (e.g. "*.txt", "*.exe;*.dll" or "*.*").
+	 * @return file path(s) that the user selected; an empty array if canceled;
+	 *         or {@code null} on failures (no dialog shown)
+	 *
+	 * @since 3.7
+	 */
+	public native static String[] showFileChooser( Window owner, boolean open,
+		String title, String okButtonLabel, String fileNameLabel, String fileName,
+		String folder, String saveAsItem, String defaultFolder, String defaultExtension,
+		int optionsSet, int optionsClear, FileChooserCallback callback,
+		int fileTypeIndex, String... fileTypes );
+
+	/** @since 3.7 */
+	public interface FileChooserCallback {
+		boolean approve( String[] files, long hwndFileDialog );
+	}
+
+	/**
+	 * Shows a modal Windows message dialog.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param messageType type of message being displayed:
+	 *        {@link JOptionPane#ERROR_MESSAGE}, {@link JOptionPane#INFORMATION_MESSAGE},
+	 *        {@link JOptionPane#WARNING_MESSAGE}, {@link JOptionPane#QUESTION_MESSAGE} or
+	 *        {@link JOptionPane#PLAIN_MESSAGE}
+	 * @param title dialog box title; or {@code null} to use title from parent window
+	 * @param text message to be displayed
+	 * @param defaultButton index of the default button, which can be pressed using ENTER key
+	 * @param buttons texts of the buttons.
+	 *        Use '&amp;' for mnemonics (e.g. "&amp;Choose").
+	 *        Use '&amp;&amp;' for '&amp;' character (e.g. "Choose &amp;&amp; Quit").
+	 * @return index of pressed button; or -1 for ESC key
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageDialog( long hwndParent, int messageType,
+		String title, String text, int defaultButton, String... buttons );
+
+	/**
+	 * Shows a Windows message box
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox">MessageBox</a>.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param text message to be displayed
+	 * @param caption dialog box title
+	 * @param type see <a href="https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox#parameters">MessageBox parameter uType</a>
+	 * @return see <a href="https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox#return-value">MessageBox Return value</a>
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageBox( long hwndParent, String text, String caption, int type );
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatOptionPaneUI.java

@@ -30,9 +30,7 @@ import javax.swing.JPanel;
 import javax.swing.JRootPane;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
-import javax.swing.border.Border;
 import javax.swing.plaf.ComponentUI;
-import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.plaf.basic.BasicOptionPaneUI;
 import com.formdev.flatlaf.FlatClientProperties;
@@ -115,13 +113,6 @@ public class FlatOptionPaneUI
 		sameSizeButtons = FlatUIUtils.getUIBoolean( "OptionPane.sameSizeButtons", true );
 	}
 
-	@Override
-	protected void installComponents() {
-		super.installComponents();
-
-		updateChildPanels( optionPane );
-	}
-
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener() {
 		PropertyChangeListener superListener = super.createPropertyChangeListener();
@@ -155,6 +146,13 @@ public class FlatOptionPaneUI
 	protected Container createMessageArea() {
 		Container messageArea = super.createMessageArea();
 
+		// use non-UIResource OptionPane.messageAreaBorder to avoid that it is replaced when switching LaF
+		// and make panel non-opaque for OptionPane.background
+		updateAreaPanel( messageArea );
+
+		// make known sub-panels non-opaque for OptionPane.background
+		updateKnownChildPanels( messageArea );
+
 		// set icon-message gap
 		if( iconMessageGap > 0 ) {
 			Component iconMessageSeparator = SwingUtils.getComponentByName( messageArea, "OptionPane.separator" );
@@ -169,6 +167,10 @@ public class FlatOptionPaneUI
 	protected Container createButtonArea() {
 		Container buttonArea = super.createButtonArea();
 
+		// use non-UIResource OptionPane.buttonAreaBorder to avoid that it is replaced when switching LaF
+		// and make panel non-opaque for OptionPane.background
+		updateAreaPanel( buttonArea );
+
 		// scale button padding and subtract focusWidth
 		if( buttonArea.getLayout() instanceof ButtonAreaLayout ) {
 			ButtonAreaLayout layout = (ButtonAreaLayout) buttonArea.getLayout();
@@ -218,22 +220,33 @@ public class FlatOptionPaneUI
 		super.addMessageComponents( container, cons, msg, maxll, internallyCreated );
 	}
 
-	private void updateChildPanels( Container c ) {
+	private void updateAreaPanel( Container area ) {
+		if( !(area instanceof JPanel) )
+			return;
+
+		// use non-UIResource border to avoid that it is replaced when switching LaF
+		// and make panel non-opaque for OptionPane.background
+		JPanel panel = (JPanel) area;
+		panel.setBorder( FlatUIUtils.nonUIResource( panel.getBorder() ) );
+		panel.setOpaque( false );
+	}
+
+	private void updateKnownChildPanels( Container c ) {
 		for( Component child : c.getComponents() ) {
-			if( child.getClass() == JPanel.class ) {
-				JPanel panel = (JPanel)child;
-
-				// make sub-panel non-opaque for OptionPane.background
-				panel.setOpaque( false );
-
-				// use non-UIResource borders to avoid that they are replaced when switching LaF
-				Border border = panel.getBorder();
-				if( border instanceof UIResource )
-					panel.setBorder( FlatUIUtils.nonUIResource( border ) );
+			if( child instanceof JPanel && child.getName() != null ) {
+				switch( child.getName() ) {
+					case "OptionPane.realBody":
+					case "OptionPane.body":
+					case "OptionPane.separator":
+					case "OptionPane.break":
+						// make known sub-panels non-opaque for OptionPane.background
+						((JPanel)child).setOpaque( false );
+						break;
+				}
 			}
 
 			if( child instanceof Container )
-				updateChildPanels( (Container) child );
+				updateKnownChildPanels( (Container) child );
 		}
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPanelUI.java

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.beans.PropertyChangeEvent;
@@ -23,11 +24,14 @@ import java.beans.PropertyChangeListener;
 import java.util.Map;
 import javax.swing.JComponent;
 import javax.swing.JPanel;
+import javax.swing.LookAndFeel;
+import javax.swing.border.Border;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicPanelUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -69,6 +73,8 @@ public class FlatPanelUI
 		super.installUI( c );
 
 		c.addPropertyChangeListener( this );
+		if( c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			FullWindowContentSupport.registerPlaceholder( c );
 
 		installStyle( (JPanel) c );
 	}
@@ -78,10 +84,20 @@ public class FlatPanelUI
 		super.uninstallUI( c );
 
 		c.removePropertyChangeListener( this );
+		if( c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			FullWindowContentSupport.unregisterPlaceholder( c );
 
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installDefaults( JPanel p ) {
+		super.installDefaults( p );
+
+		if( p.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			LookAndFeel.installProperty( p, "opaque", false );
+	}
+
 	/** @since 2.0.1 */
 	@Override
 	public void propertyChange( PropertyChangeEvent e ) {
@@ -96,7 +112,18 @@ public class FlatPanelUI
 				} else
 					installStyle( c );
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
+				break;
+
+			case FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER:
+				JPanel p = (JPanel) e.getSource();
+				if( e.getOldValue() != null )
+					FullWindowContentSupport.unregisterPlaceholder( p );
+				if( e.getNewValue() != null )
+					FullWindowContentSupport.registerPlaceholder( p );
+
+				// make panel non-opaque for placeholders
+				LookAndFeel.installProperty( p, "opaque", e.getNewValue() == null );
 				break;
 		}
 	}
@@ -135,31 +162,52 @@ public class FlatPanelUI
 
 	@Override
 	public void update( Graphics g, JComponent c ) {
-		// fill background
-		if( c.isOpaque() ) {
-			int width = c.getWidth();
-			int height = c.getHeight();
-			int arc = (this.arc >= 0)
-				? this.arc
-				: ((c.getBorder() instanceof FlatLineBorder)
-					? ((FlatLineBorder)c.getBorder()).getArc()
-					: 0);
-
-			// fill background with parent color to avoid garbage in rounded corners
-			if( arc > 0 )
-				FlatUIUtils.paintParentBackground( g, c );
-
-			g.setColor( c.getBackground() );
-			if( arc > 0 ) {
-				// fill rounded rectangle if having rounded corners
-				Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
-				FlatUIUtils.paintComponentBackground( (Graphics2D) g, 0, 0, width, height,
-					0, UIScale.scale( arc ) );
-				FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
-			} else
-				g.fillRect( 0, 0, width, height );
-		}
-
+		fillRoundedBackground( g, c, arc );
 		paint( g, c );
 	}
+
+	/** @since 3.5 */
+	public static void fillRoundedBackground( Graphics g, JComponent c, int arc ) {
+		if( arc < 0 ) {
+			Border border = c.getBorder();
+			arc = ((border instanceof FlatLineBorder)
+				? ((FlatLineBorder)border).getArc()
+				: 0);
+		}
+
+		// fill background
+		if( c.isOpaque() ) {
+			if( arc > 0 ) {
+				// fill background with parent color to avoid garbage in rounded corners
+				FlatUIUtils.paintParentBackground( g, c );
+			} else {
+				g.setColor( c.getBackground() );
+				g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
+			}
+		}
+
+		// fill rounded rectangle if having rounded corners
+		if( arc > 0 ) {
+			g.setColor( c.getBackground() );
+			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+			FlatUIUtils.paintComponentBackground( (Graphics2D) g, 0, 0, c.getWidth(), c.getHeight(),
+				0, UIScale.scale( arc ) );
+			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+		}
+	}
+
+	@Override
+	public Dimension getPreferredSize( JComponent c ) {
+		Object value = c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER );
+		if( value != null )
+			return FullWindowContentSupport.getPlaceholderPreferredSize( c, (String) value );
+
+		return super.getPreferredSize( c );
+	}
+
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		if( c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			FullWindowContentSupport.debugPaint( g, c );
+	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPasswordFieldUI.java

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf.ui;
 
-import java.awt.Color;
 import java.awt.Graphics;
 import java.awt.Rectangle;
 import java.awt.Toolkit;
@@ -41,8 +40,9 @@ import javax.swing.text.JTextComponent;
 import javax.swing.text.PasswordView;
 import javax.swing.text.View;
 import com.formdev.flatlaf.FlatClientProperties;
-import com.formdev.flatlaf.icons.FlatCapsLockIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -66,7 +66,6 @@ import com.formdev.flatlaf.util.UIScale;
  * <!-- FlatTextFieldUI -->
  *
  * @uiDefault Component.minimumWidth				int
- * @uiDefault Component.isIntelliJTheme				boolean
  * @uiDefault PasswordField.placeholderForeground	Color
  * @uiDefault PasswordField.focusedBackground		Color	optional
  * @uiDefault PasswordField.iconTextGap				int		optional, default is 4
@@ -164,7 +163,7 @@ public class FlatPasswordFieldUI
 			}
 			private void repaint( KeyEvent e ) {
 				if( e.getKeyCode() == KeyEvent.VK_CAPS_LOCK ) {
-					e.getComponent().repaint();
+					HiDPIUtils.repaint( e.getComponent() );
 					scrollCaretToVisible();
 				}
 			}
@@ -215,12 +214,12 @@ public class FlatPasswordFieldUI
 	/** @since 2 */
 	@Override
 	protected Object applyStyleProperty( String key, Object value ) {
-		if( key.equals( "capsLockIconColor" ) && capsLockIcon instanceof FlatCapsLockIcon ) {
+		if( key.equals( "capsLockIconColor" ) && capsLockIcon instanceof StyleableObject ) {
 			if( capsLockIconShared ) {
 				capsLockIcon = FlatStylingSupport.cloneIcon( capsLockIcon );
 				capsLockIconShared = false;
 			}
-			return ((FlatCapsLockIcon)capsLockIcon).applyStyleProperty( key, value );
+			return ((StyleableObject)capsLockIcon).applyStyleProperty( key, value );
 		}
 
 		return super.applyStyleProperty( key, value );
@@ -230,14 +229,15 @@ public class FlatPasswordFieldUI
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
 		Map<String, Class<?>> infos = super.getStyleableInfos( c );
-		infos.put( "capsLockIconColor", Color.class );
+		if( capsLockIcon instanceof StyleableObject )
+			infos.putAll( ((StyleableObject)capsLockIcon).getStyleableInfos() );
 		return infos;
 	}
 
 	@Override
 	public Object getStyleableValue( JComponent c, String key ) {
-		if( key.equals( "capsLockIconColor" ) && capsLockIcon instanceof FlatCapsLockIcon )
-			return ((FlatCapsLockIcon)capsLockIcon).getStyleableValue( key );
+		if( key.equals( "capsLockIconColor" ) && capsLockIcon instanceof StyleableObject )
+			return ((StyleableObject)capsLockIcon).getStyleableValue( key );
 
 		return super.getStyleableValue( c, key );
 	}
@@ -327,7 +327,7 @@ public class FlatPasswordFieldUI
 		if( visible != revealButton.isVisible() ) {
 			revealButton.setVisible( visible );
 			c.revalidate();
-			c.repaint();
+			HiDPIUtils.repaint( c );
 
 			if( !visible ) {
 				revealButton.setSelected( false );

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPopupFactory.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.AWTEvent;
+import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Container;
@@ -31,15 +32,19 @@ import java.awt.Panel;
 import java.awt.Point;
 import java.awt.PointerInfo;
 import java.awt.Rectangle;
-import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
+import java.awt.event.HierarchyEvent;
+import java.awt.event.HierarchyListener;
 import java.awt.event.MouseEvent;
+import java.awt.event.WindowFocusListener;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.concurrent.atomic.AtomicReference;
 import javax.swing.JComponent;
 import javax.swing.JLayeredPane;
 import javax.swing.JPanel;
@@ -57,6 +62,7 @@ import javax.swing.border.EmptyBorder;
 import javax.swing.border.LineBorder;
 import javax.swing.plaf.basic.BasicComboPopup;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -70,9 +76,13 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatPopupFactory
 	extends PopupFactory
 {
+	static final String KEY_POPUP_USES_NATIVE_BORDER = "FlatLaf.internal.FlatPopupFactory.popupUsesNativeBorder";
+
 	private MethodHandle java8getPopupMethod;
 	private MethodHandle java9getPopupMethod;
 
+	private final ArrayList<NonFlashingPopup> stillShownHeavyWeightPopups = new ArrayList<>();
+
 	@Override
 	public Popup getPopup( Component owner, Component contents, int x, int y )
 		throws IllegalArgumentException
@@ -83,28 +93,54 @@ public class FlatPopupFactory
 			y = pt.y;
 		}
 
+		fixLinuxWaylandJava21focusIssue( owner );
+
+		// reuse a heavy weight popup window, which is still shown on screen,
+		// to avoid flicker when popup (e.g. tooltip) is moving while mouse is moved
+		for( NonFlashingPopup popup : stillShownHeavyWeightPopups ) {
+			if( popup.delegate != null &&
+				popup.owner == owner &&
+				(popup.contents == contents ||
+				 (popup.contents instanceof JToolTip && contents instanceof JToolTip)) )
+			{
+				stillShownHeavyWeightPopups.remove( popup );
+				return reuseStillShownHeavyWeightPopups( popup, contents, x, y );
+			}
+		}
+
 		boolean forceHeavyWeight = isOptionEnabled( owner, contents, FlatClientProperties.POPUP_FORCE_HEAVY_WEIGHT, "Popup.forceHeavyWeight" );
 
 		if( !isOptionEnabled( owner, contents, FlatClientProperties.POPUP_DROP_SHADOW_PAINTED, "Popup.dropShadowPainted" ) || SystemInfo.isProjector || SystemInfo.isWebswing )
-			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), contents );
+			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), owner, contents );
 
 		// macOS and Linux adds drop shadow to heavy weight popups
-		if( SystemInfo.isMacOS || SystemInfo.isLinux )
-			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), contents );
-
-		// Windows 11 with FlatLaf native library can use rounded corners and shows drop shadow for heavy weight popups
-		int borderCornerRadius;
-		if( isWindows11BorderSupported() &&
-			(borderCornerRadius = getBorderCornerRadius( owner, contents )) > 0 )
-		{
-			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), contents );
-			if( popup.popupWindow != null )
-				setupWindows11Border( popup.popupWindow, contents, borderCornerRadius );
+		if( SystemInfo.isMacOS || SystemInfo.isLinux ) {
+			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), owner, contents );
+			if( popup.popupWindow != null && isMacOSBorderSupported() )
+				setupRoundedBorder( popup.popupWindow, owner, contents );
 			return popup;
 		}
 
+		// Windows 11 with FlatLaf native library can use rounded corners and shows drop shadow for heavy weight popups
+		if( isWindows11BorderSupported() &&
+			getBorderCornerRadius( owner, contents ) > 0 )
+		{
+			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), owner, contents );
+			if( popup.popupWindow != null )
+				setupRoundedBorder( popup.popupWindow, owner, contents );
+			return popup;
+		}
+
+		// check whether popup overlaps a heavy weight component
+		if( !forceHeavyWeight && overlapsHeavyWeightComponent( owner, contents, x, y ) )
+			forceHeavyWeight = true;
+
 		// create drop shadow popup
-		return new DropShadowPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), owner, contents );
+		Popup popupForScreenOfOwner = getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight );
+		GraphicsConfiguration gc = (owner != null) ? owner.getGraphicsConfiguration() : null;
+		return (gc != null && gc.isTranslucencyCapable())
+			? new DropShadowPopup( popupForScreenOfOwner, owner, contents )
+			: new NonFlashingPopup( popupForScreenOfOwner, owner, contents );
 	}
 
 	/**
@@ -155,67 +191,6 @@ public class FlatPopupFactory
 		}
 	}
 
-	/**
-	 * Shows the given popup and, if necessary, fixes the location of a heavy weight popup window.
-	 * <p>
-	 * On a dual screen setup, where screens use different scale factors, it may happen
-	 * that the window location changes when showing a heavy weight popup window.
-	 * E.g. when opening a dialog on the secondary screen and making combobox popup visible.
-	 * <p>
-	 * This is a workaround for https://bugs.openjdk.java.net/browse/JDK-8224608
-	 */
-	private static void showPopupAndFixLocation( Popup popup, Window popupWindow ) {
-		if( popupWindow != null ) {
-			// remember location of heavy weight popup window
-			int x = popupWindow.getX();
-			int y = popupWindow.getY();
-
-			popup.show();
-
-			// restore popup window location if it has changed
-			// (probably scaled when screens use different scale factors)
-			if( popupWindow.getX() != x || popupWindow.getY() != y )
-				popupWindow.setLocation( x, y );
-		} else
-			popup.show();
-	}
-
-	private boolean isOptionEnabled( Component owner, Component contents, String clientKey, String uiKey ) {
-		Object value = getOption( owner, contents, clientKey, uiKey );
-		return (value instanceof Boolean) ? (Boolean) value : false;
-	}
-
-	private int getBorderCornerRadius( Component owner, Component contents ) {
-		String uiKey =
-			(contents instanceof BasicComboPopup) ? "ComboBox.borderCornerRadius" :
-			(contents instanceof JPopupMenu) ? "PopupMenu.borderCornerRadius" :
-			(contents instanceof JToolTip) ? "ToolTip.borderCornerRadius" :
-			"Popup.borderCornerRadius";
-
-		Object value = getOption( owner, contents, FlatClientProperties.POPUP_BORDER_CORNER_RADIUS, uiKey );
-		return (value instanceof Integer) ? (Integer) value : 0;
-	}
-
-	/**
-	 * Get option from:
-	 * <ol>
-	 * <li>client property {@code clientKey} of {@code owner}
-	 * <li>client property {@code clientKey} of {@code contents}
-	 * <li>UI property {@code uiKey}
-	 * </ol>
-	 */
-	private Object getOption( Component owner, Component contents, String clientKey, String uiKey ) {
-		for( Component c : new Component[] { owner, contents } ) {
-			if( c instanceof JComponent ) {
-				Object value = ((JComponent)c).getClientProperty( clientKey );
-				if( value != null )
-					return value;
-			}
-		}
-
-		return UIManager.get( uiKey );
-	}
-
 	/**
 	 * There is no API in Java 8 to force creation of heavy weight popups,
 	 * but it is possible with reflection. Java 9 provides a new method.
@@ -251,6 +226,51 @@ public class FlatPopupFactory
 		}
 	}
 
+	private static boolean isOptionEnabled( Component owner, Component contents, String clientKey, String uiKey ) {
+		Object value = getOption( owner, contents, clientKey, uiKey );
+		return (value instanceof Boolean) ? (Boolean) value : false;
+	}
+
+	/**
+	 * Get option from:
+	 * <ol>
+	 * <li>client property {@code clientKey} of {@code owner}
+	 * <li>client property {@code clientKey} of {@code contents}
+	 * <li>UI property {@code uiKey}
+	 * </ol>
+	 */
+	private static Object getOption( Component owner, Component contents, String clientKey, String uiKey ) {
+		for( Component c : new Component[] { owner, contents } ) {
+			if( c instanceof JComponent ) {
+				Object value = ((JComponent)c).getClientProperty( clientKey );
+				if( value != null )
+					return value;
+			}
+		}
+
+		return UIManager.get( uiKey );
+	}
+
+	/**
+	 * Reuse a heavy weight popup window, which is still shown on screen,
+	 * by updating window location and contents.
+	 * This avoid flicker when popup (e.g. a tooltip) is moving while mouse is moved.
+	 * E.g. overridden JComponent.getToolTipLocation(MouseEvent).
+	 * See ToolTipManager.checkForTipChange(MouseEvent).
+	 */
+	private static NonFlashingPopup reuseStillShownHeavyWeightPopups(
+		NonFlashingPopup reusePopup, Component contents, int ownerX, int ownerY )
+	{
+		// clone popup because PopupFactory.getPopup() should not return old instance
+		NonFlashingPopup popup = reusePopup.cloneForReuse();
+
+		// update popup location, size and contents
+		popup.reset( contents, ownerX, ownerY );
+		return popup;
+	}
+
+	//---- tooltips -----------------------------------------------------------
+
 	/**
 	 * Usually ToolTipManager places a tooltip at (mouseLocation.x, mouseLocation.y + 20).
 	 * In case that the tooltip would be partly outside of the screen,
@@ -285,13 +305,13 @@ public class FlatPopupFactory
 				break;
 			}
 		}
-		if( gc == null )
+		if( gc == null && owner != null )
 			gc = owner.getGraphicsConfiguration();
 		if( gc == null )
 			return null;
 
 		Rectangle screenBounds = gc.getBounds();
-		Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
+		Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
 		int screenTop = screenBounds.y + screenInsets.top;
 
 		// place tooltip above mouse location if there is enough space
@@ -335,48 +355,84 @@ public class FlatPopupFactory
 			((JComponent)owner).getToolTipLocation( me ) != null;
 	}
 
+	//---- native rounded border ----------------------------------------------
+
 	private static boolean isWindows11BorderSupported() {
-		return SystemInfo.isWindows_11_orLater && FlatNativeWindowsLibrary.isLoaded();
+		return SystemInfo.isWindows_11_orLater &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.USE_ROUNDED_POPUP_BORDER, true ) &&
+			FlatNativeWindowsLibrary.isLoaded();
 	}
 
-	private static void setupWindows11Border( Window popupWindow, Component contents, int borderCornerRadius ) {
-		// make sure that the Windows 11 window is created
-		if( !popupWindow.isDisplayable() )
-			popupWindow.addNotify();
+	private static boolean isMacOSBorderSupported() {
+		return SystemInfo.isMacOS &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.USE_ROUNDED_POPUP_BORDER, true ) &&
+			FlatNativeMacLibrary.isLoaded();
+	}
 
-		// get window handle
-		long hwnd = FlatNativeWindowsLibrary.getHWND( popupWindow );
+	private static void setupRoundedBorder( Window popupWindow, Component owner, Component contents ) {
+		int borderCornerRadius = getBorderCornerRadius( owner, contents );
+		float borderWidth = getRoundedBorderWidth( owner, contents );
 
-		// set corner preference
-		int cornerPreference = (borderCornerRadius <= 4)
-			? FlatNativeWindowsLibrary.DWMWCP_ROUNDSMALL  // 4px
-			: FlatNativeWindowsLibrary.DWMWCP_ROUND;      // 8px
-		FlatNativeWindowsLibrary.setWindowCornerPreference( hwnd, cornerPreference );
-
-		// set border color
-		int red = -1; // use system default color
-		int green = 0;
-		int blue = 0;
+		// get Swing border color
+		Color borderColor;
 		if( contents instanceof JComponent ) {
 			Border border = ((JComponent)contents).getBorder();
 			border = FlatUIUtils.unwrapNonUIResourceBorder( border );
 
 			// get color from border of contents (e.g. JPopupMenu or JToolTip)
-			Color borderColor = null;
 			if( border instanceof FlatLineBorder )
 				borderColor = ((FlatLineBorder)border).getLineColor();
 			else if( border instanceof LineBorder )
 				borderColor = ((LineBorder)border).getLineColor();
 			else if( border instanceof EmptyBorder )
-				red = -2; // do not paint border
+				borderColor = FlatNativeWindowsLibrary.COLOR_NONE; // do not paint border
+			else
+				borderColor = null; // use system default color
 
-			if( borderColor != null ) {
-				red = borderColor.getRed();
-				green = borderColor.getGreen();
-				blue = borderColor.getBlue();
-			}
+			// avoid that FlatLineBorder paints the Swing border
+			((JComponent)contents).putClientProperty( KEY_POPUP_USES_NATIVE_BORDER, true );
+		} else
+			borderColor = null; // use system default color
+
+		if( popupWindow.isDisplayable() ) {
+			// native window already created
+			setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+		} else {
+			// native window not yet created --> add listener to set native border after window creation
+			AtomicReference<HierarchyListener> l = new AtomicReference<>();
+			l.set( e -> {
+				if( e.getID() == HierarchyEvent.HIERARCHY_CHANGED &&
+					(e.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0 )
+				{
+					setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+					popupWindow.removeHierarchyListener( l.get() );
+				}
+			} );
+			popupWindow.addHierarchyListener( l.get() );
+		}
+	}
+
+	private static void setupRoundedBorderImpl( Window popupWindow, int borderCornerRadius, float borderWidth, Color borderColor ) {
+		if( SystemInfo.isWindows ) {
+			// get native window handle
+			long hwnd = FlatNativeWindowsLibrary.getHWND( popupWindow );
+
+			// set corner preference
+			int cornerPreference = (borderCornerRadius <= 4)
+				? FlatNativeWindowsLibrary.DWMWCP_ROUNDSMALL  // 4px
+				: FlatNativeWindowsLibrary.DWMWCP_ROUND;      // 8px
+			FlatNativeWindowsLibrary.setWindowCornerPreference( hwnd, cornerPreference );
+
+			// set border color
+			FlatNativeWindowsLibrary.dwmSetWindowAttributeCOLORREF( hwnd, FlatNativeWindowsLibrary.DWMWA_BORDER_COLOR, borderColor );
+		} else if( SystemInfo.isMacOS ) {
+			if( borderColor == null || borderColor == FlatNativeWindowsLibrary.COLOR_NONE )
+				borderWidth = 0;
+
+			// set corner radius, border width and color
+			FlatNativeMacLibrary.setWindowRoundedBorder( popupWindow, borderCornerRadius,
+				borderWidth, (borderColor != null) ? borderColor.getRGB() : 0 );
 		}
-		FlatNativeWindowsLibrary.setWindowBorderColor( hwnd, red, green, blue );
 	}
 
 	private static void resetWindows11Border( Window popupWindow ) {
@@ -389,20 +445,152 @@ public class FlatPopupFactory
 		FlatNativeWindowsLibrary.setWindowCornerPreference( hwnd, FlatNativeWindowsLibrary.DWMWCP_DONOTROUND );
 	}
 
+	private static int getBorderCornerRadius( Component owner, Component contents ) {
+		String uiKey =
+			(contents instanceof BasicComboPopup) ? "ComboBox.borderCornerRadius" :
+			(contents instanceof JPopupMenu) ? "PopupMenu.borderCornerRadius" :
+			(contents instanceof JToolTip) ? "ToolTip.borderCornerRadius" :
+			"Popup.borderCornerRadius";
+
+		Object value = getOption( owner, contents, FlatClientProperties.POPUP_BORDER_CORNER_RADIUS, uiKey );
+		return (value instanceof Integer) ? (Integer) value : 0;
+	}
+
+	private static float getRoundedBorderWidth( Component owner, Component contents ) {
+		String uiKey =
+			(contents instanceof BasicComboPopup) ? "ComboBox.roundedBorderWidth" :
+			(contents instanceof JPopupMenu) ? "PopupMenu.roundedBorderWidth" :
+			(contents instanceof JToolTip) ? "ToolTip.roundedBorderWidth" :
+			"Popup.roundedBorderWidth";
+
+		Object value = getOption( owner, contents, FlatClientProperties.POPUP_ROUNDED_BORDER_WIDTH, uiKey );
+		return (value instanceof Number) ? ((Number)value).floatValue() : 0;
+	}
+
+	//---- fixes --------------------------------------------------------------
+
+	private static boolean overlapsHeavyWeightComponent( Component owner, Component contents, int x, int y ) {
+		if( owner == null )
+			return false;
+
+		Window window = SwingUtilities.getWindowAncestor( owner );
+		if( window == null )
+			return false;
+
+		Rectangle r = new Rectangle( new Point( x, y ), contents.getPreferredSize() );
+		return overlapsHeavyWeightComponent( window, r );
+	}
+
+	private static boolean overlapsHeavyWeightComponent( Component parent, Rectangle r ) {
+		if( !parent.isVisible() || !r.intersects( parent.getBounds() ) )
+			return false;
+
+		if( !parent.isLightweight() && !(parent instanceof Window) )
+			return true;
+
+		if( parent instanceof Container ) {
+			Rectangle r2 = new Rectangle( r.x - parent.getX(), r.y - parent.getY(), r.width, r.height );
+			for( Component c : ((Container)parent).getComponents() ) {
+				if( overlapsHeavyWeightComponent( c, r2 ) )
+					return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * On Linux with Wayland, since Java 21, Swing adds a window focus listener to popup owner/invoker window,
+	 * which hides the popup as soon as the owner/invoker window looses focus.
+	 * This works fine for light-weight popups.
+	 * It also works for heavy-weight popups if they do not request focus.
+	 * Because FlatLaf always uses heavy-weight popups, all popups that request focus
+	 * are broken since Java 21.
+	 *
+	 * This method removes the problematic window focus listener.
+	 *
+	 * https://bugs.openjdk.org/browse/JDK-8280993
+	 * https://github.com/openjdk/jdk/pull/13830
+	 */
+	private static void fixLinuxWaylandJava21focusIssue( Component owner ) {
+		// only necessary on Linux when running in Java 21+
+		if( owner == null || !SystemInfo.isLinux || SystemInfo.javaVersion < SystemInfo.toVersion( 21, 0, 0, 0 ) )
+			return;
+
+		// get window
+		Window window = SwingUtilities.getWindowAncestor( owner );
+		if( window == null )
+			return;
+
+		// remove window focus listener, which was added from class sun.awt.UNIXToolkit since Java 21
+		for( WindowFocusListener l : window.getWindowFocusListeners() ) {
+			if( "sun.awt.UNIXToolkit$1".equals( l.getClass().getName() ) ) {
+				window.removeWindowFocusListener( l );
+				break;
+			}
+		}
+	}
+
+	/**
+	 * Shows the given popup and, if necessary, fixes the location of a heavy weight popup window.
+	 * <p>
+	 * On a dual screen setup, where screens use different scale factors, it may happen
+	 * that the window location changes when showing a heavy weight popup window.
+	 * E.g. when opening a dialog on the secondary screen and making combobox popup visible.
+	 * <p>
+	 * This is a workaround for https://bugs.openjdk.java.net/browse/JDK-8224608
+	 */
+	private static void showPopupAndFixLocation( Popup popup, Window popupWindow ) {
+		if( popupWindow != null ) {
+			// remember location of heavy weight popup window
+			int x = popupWindow.getX();
+			int y = popupWindow.getY();
+
+			if( !popupWindow.isVisible() )
+				popup.show();
+			else {
+				// if the popup window is already visible (because it is reused),
+				// do not invoke Popup.show() because this would invoke Window.toFront(),
+				// which may have the side effect that an inactive owner window
+				// would be also moved to front and maybe hide previously active window
+				popupWindow.pack();
+			}
+
+			// restore popup window location if it has changed
+			// (probably scaled when screens use different scale factors)
+			if( popupWindow.getX() != x || popupWindow.getY() != y )
+				popupWindow.setLocation( x, y );
+		} else
+			popup.show();
+	}
+
 	//---- class NonFlashingPopup ---------------------------------------------
 
+	/**
+	 * Fixes popup background flashing effect when using dark theme on light platform theme,
+	 * where the light popup background is shown for a fraction of a second before
+	 * the dark popup content is shown.
+	 * This is fixed by setting popup background to content background.
+	 * <p>
+	 * Defers hiding of heavy weight popup window for an event cycle,
+	 * which allows reusing popup window to avoid flicker when "moving" popup.
+	 */
 	private class NonFlashingPopup
 		extends Popup
 	{
 		private Popup delegate;
+		Component owner;
 		private Component contents;
 
 		// heavy weight
-		protected Window popupWindow;
+		Window popupWindow;
 		private Color oldPopupWindowBackground;
 
-		NonFlashingPopup( Popup delegate, Component contents ) {
+		private boolean disposed;
+
+		NonFlashingPopup( Popup delegate, Component owner, Component contents ) {
 			this.delegate = delegate;
+			this.owner = owner;
 			this.contents = contents;
 
 			popupWindow = SwingUtilities.windowForComponent( contents );
@@ -416,10 +604,52 @@ public class FlatPopupFactory
 			}
 		}
 
+		private NonFlashingPopup( NonFlashingPopup reusePopup ) {
+			delegate = reusePopup.delegate;
+			owner = reusePopup.owner;
+			contents = reusePopup.contents;
+			popupWindow = reusePopup.popupWindow;
+			oldPopupWindowBackground = reusePopup.oldPopupWindowBackground;
+		}
+
+		NonFlashingPopup cloneForReuse() {
+			return new NonFlashingPopup( this );
+		}
+
 		@Override
-		public void show() {
+		public final void show() {
+			if( disposed )
+				return;
+
+			showImpl();
+		}
+
+		void showImpl() {
 			if( delegate != null ) {
-				showPopupAndFixLocation( delegate, popupWindow );
+				// On macOS and Linux, the empty popup window is shown in popup.show()
+				// (in peer.setVisible(true) invoked from Component.show()),
+				// but the popup content is painted later via repaint manager.
+				// This may cause some flicker, especially during JVM warm-up or
+				// when running JVM in interpreter mode (option -Xint).
+				// To reduce flicker, immediately paint popup content as soon as popup window becomes visible.
+				// This also fixes a problem with JetBrainsRuntime JVM, where sometimes the popups were empty.
+				if( (SystemInfo.isMacOS || SystemInfo.isLinux) && popupWindow instanceof JWindow ) {
+					HierarchyListener l = e -> {
+						if( e.getID() == HierarchyEvent.HIERARCHY_CHANGED &&
+							(e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0 )
+						{
+							((JWindow)popupWindow).getRootPane().paintImmediately(
+								0, 0, popupWindow.getWidth(), popupWindow.getHeight() );
+						}
+					};
+					popupWindow.addHierarchyListener( l );
+					try {
+						showPopupAndFixLocation( delegate, popupWindow );
+					} finally {
+						popupWindow.removeHierarchyListener( l );
+					}
+				} else
+					showPopupAndFixLocation( delegate, popupWindow );
 
 				// increase tooltip size if necessary because it may be too small on HiDPI screens
 				//    https://bugs.openjdk.java.net/browse/JDK-8213535
@@ -441,10 +671,39 @@ public class FlatPopupFactory
 		}
 
 		@Override
-		public void hide() {
+		public final void hide() {
+			if( disposed )
+				return;
+			disposed = true;
+
+			// immediately hide non-heavy weight popups, popup menus and combobox popups
+			// of if system property is false
+			if( !(popupWindow instanceof JWindow) || contents instanceof JPopupMenu ||
+				!FlatSystemProperties.getBoolean( FlatSystemProperties.REUSE_VISIBLE_POPUP_WINDOW, true ) )
+			{
+				hideImpl();
+				return;
+			}
+
+			// defer hiding of heavy weight popup window for an event cycle,
+			// which allows reusing popup window to avoid flicker when "moving" popup
+			((JWindow)popupWindow).getContentPane().removeAll();
+			stillShownHeavyWeightPopups.add( this );
+			EventQueue.invokeLater( () -> {
+				// hide popup if it was not reused
+				if( stillShownHeavyWeightPopups.remove( this ) )
+					hideImpl();
+			} );
+		}
+
+		void hideImpl() {
+			if( contents instanceof JComponent )
+				((JComponent)contents).putClientProperty( KEY_POPUP_USES_NATIVE_BORDER, null );
+
 			if( delegate != null ) {
 				delegate.hide();
 				delegate = null;
+				owner = null;
 				contents = null;
 			}
 
@@ -452,18 +711,54 @@ public class FlatPopupFactory
 				// restore background so that it can not affect other LaFs (when switching)
 				// because popup windows are cached and reused
 				popupWindow.setBackground( oldPopupWindowBackground );
+
+				// On macOS, popupWindow.setBackground(...) invoked from constructor,
+				// has no affect if the popup window peer (a NSWindow) is already created,
+				// which is the case when reusing a cached popup window
+				// (see class PopupFactory.HeavyWeightPopup).
+				// This may result in flicker when e.g. showing a popup in a light theme,
+				// then switching to a dark theme and again showing a popup,
+				// because the underling NSWindow still has a light background,
+				// which may be shown shortly before the actual dark popup content is shown.
+				// To fix this, dispose the popup window, which disposes the NSWindow.
+				// The AWT popup window stays in the popup cache, but when reusing it later,
+				// a new peer and a new NSWindow is created and gets the correct background.
+				if( SystemInfo.isMacOS )
+					popupWindow.dispose();
+
 				popupWindow = null;
 			}
 		}
+
+		void reset( Component contents, int ownerX, int ownerY ) {
+			// update popup window location
+			popupWindow.setLocation( ownerX, ownerY );
+
+			// replace component in content pane
+			Container contentPane = ((JWindow)popupWindow).getContentPane();
+			contentPane.removeAll();
+			contentPane.add( contents, BorderLayout.CENTER );
+			popupWindow.pack();
+
+			// update client property on contents
+			if( this.contents != contents ) {
+				Object old = (this.contents instanceof JComponent)
+					? ((JComponent)this.contents).getClientProperty( KEY_POPUP_USES_NATIVE_BORDER )
+					: null;
+				if( contents instanceof JComponent )
+					((JComponent)contents).putClientProperty( KEY_POPUP_USES_NATIVE_BORDER, old );
+
+				this.contents = contents;
+			}
+		}
 	}
 
 	//---- class DropShadowPopup ----------------------------------------------
 
 	private class DropShadowPopup
 		extends NonFlashingPopup
+		implements ComponentListener
 	{
-		private final Component owner;
-
 		// light weight
 		private JComponent lightComp;
 		private Border oldBorder;
@@ -478,11 +773,11 @@ public class FlatPopupFactory
 		// heavy weight
 		private Popup dropShadowDelegate;
 		private Window dropShadowWindow;
+		private JPanel dropShadowPanel2;
 		private Color oldDropShadowWindowBackground;
 
 		DropShadowPopup( Popup delegate, Component owner, Component contents ) {
-			super( delegate, contents );
-			this.owner = owner;
+			super( delegate, owner, contents );
 
 			Dimension size = contents.getPreferredSize();
 			if( size.width <= 0 || size.height <= 0 )
@@ -498,31 +793,31 @@ public class FlatPopupFactory
 				// the drop shadow and is positioned behind the popup window.
 
 				// create panel that paints the drop shadow
-				JPanel dropShadowPanel = new JPanel();
-				dropShadowPanel.setBorder( createDropShadowBorder() );
-				dropShadowPanel.setOpaque( false );
+				dropShadowPanel2 = new JPanel();
+				dropShadowPanel2.setBorder( createDropShadowBorder() );
+				dropShadowPanel2.setOpaque( false );
 
 				// set preferred size of drop shadow panel
 				Dimension prefSize = popupWindow.getPreferredSize();
-				Insets insets = dropShadowPanel.getInsets();
-				dropShadowPanel.setPreferredSize( new Dimension(
+				Insets insets = dropShadowPanel2.getInsets();
+				dropShadowPanel2.setPreferredSize( new Dimension(
 					prefSize.width + insets.left + insets.right,
 					prefSize.height + insets.top + insets.bottom ) );
 
 				// create heavy weight popup for drop shadow
 				int x = popupWindow.getX() - insets.left;
 				int y = popupWindow.getY() - insets.top;
-				dropShadowDelegate = getPopupForScreenOfOwner( owner, dropShadowPanel, x, y, true );
+				dropShadowDelegate = getPopupForScreenOfOwner( owner, dropShadowPanel2, x, y, true );
 
 				// make drop shadow popup window translucent
-				dropShadowWindow = SwingUtilities.windowForComponent( dropShadowPanel );
+				dropShadowWindow = SwingUtilities.windowForComponent( dropShadowPanel2 );
 				if( dropShadowWindow != null ) {
 					oldDropShadowWindowBackground = dropShadowWindow.getBackground();
 					dropShadowWindow.setBackground( new Color( 0, true ) );
 				}
 
 				// Windows 11: reset corner preference on reused heavy weight popups
-				if( isWindows11BorderSupported() ) {
+				if( SystemInfo.isWindows_11_orLater && FlatNativeWindowsLibrary.isLoaded() ) {
 					resetWindows11Border( popupWindow );
 					if( dropShadowWindow != null )
 						resetWindows11Border( dropShadowWindow );
@@ -552,6 +847,23 @@ public class FlatPopupFactory
 			}
 		}
 
+		private DropShadowPopup( DropShadowPopup reusePopup ) {
+			super( reusePopup );
+
+			// not necessary to clone fields used for light/medium weight popups
+
+			// heavy weight
+			dropShadowDelegate = reusePopup.dropShadowDelegate;
+			dropShadowWindow = reusePopup.dropShadowWindow;
+			dropShadowPanel2 = reusePopup.dropShadowPanel2;
+			oldDropShadowWindowBackground = reusePopup.oldDropShadowWindowBackground;
+		}
+
+		@Override
+		NonFlashingPopup cloneForReuse() {
+			return new DropShadowPopup( this );
+		}
+
 		private Border createDropShadowBorder() {
 			return new FlatDropShadowBorder(
 				UIManager.getColor( "Popup.dropShadowColor" ),
@@ -560,14 +872,14 @@ public class FlatPopupFactory
 		}
 
 		@Override
-		public void show() {
+		void showImpl() {
 			if( dropShadowDelegate != null )
 				showPopupAndFixLocation( dropShadowDelegate, dropShadowWindow );
 
 			if( mediumWeightPanel != null )
 				showMediumWeightDropShadow();
 
-			super.show();
+			super.showImpl();
 
 			// fix location of light weight popup in case it has left or top drop shadow
 			if( lightComp != null ) {
@@ -575,13 +887,22 @@ public class FlatPopupFactory
 				if( insets.left != 0 || insets.top != 0 )
 					lightComp.setLocation( lightComp.getX() - insets.left, lightComp.getY() - insets.top );
 			}
+
+			if( popupWindow != null ) {
+				removeAllPopupWindowComponentListeners();
+				popupWindow.addComponentListener( this );
+			}
 		}
 
 		@Override
-		public void hide() {
+		void hideImpl() {
+			if( popupWindow != null )
+				removeAllPopupWindowComponentListeners();
+
 			if( dropShadowDelegate != null ) {
 				dropShadowDelegate.hide();
 				dropShadowDelegate = null;
+				dropShadowPanel2 = null;
 			}
 
 			if( mediumWeightPanel != null ) {
@@ -590,7 +911,7 @@ public class FlatPopupFactory
 				mediumWeightPanel = null;
 			}
 
-			super.hide();
+			super.hideImpl();
 
 			if( dropShadowWindow != null ) {
 				dropShadowWindow.setBackground( oldDropShadowWindowBackground );
@@ -674,5 +995,58 @@ public class FlatPopupFactory
 			if( dropShadowPanel != null && mediumWeightPanel != null )
 				dropShadowPanel.setSize( FlatUIUtils.addInsets( mediumWeightPanel.getSize(), dropShadowPanel.getInsets() ) );
 		}
+
+		@Override
+		void reset( Component contents, int ownerX, int ownerY ) {
+			if( popupWindow != null )
+				removeAllPopupWindowComponentListeners();
+
+			super.reset( contents, ownerX, ownerY );
+
+			updateDropShadowWindowBounds();
+		}
+
+		private void updateDropShadowWindowBounds() {
+			if( dropShadowWindow == null )
+				return;
+
+			// calculate size of drop shadow window
+			Dimension size = popupWindow.getSize();
+			Insets insets = dropShadowPanel2.getInsets();
+			int w = size.width + insets.left + insets.right;
+			int h = size.height + insets.top + insets.bottom;
+
+			// update drop shadow popup window bounds
+			int x = popupWindow.getX() - insets.left;
+			int y = popupWindow.getY() - insets.top;
+			dropShadowWindow.setBounds( x, y, w, h );
+			dropShadowWindow.validate();
+		}
+
+		private void removeAllPopupWindowComponentListeners() {
+			// make sure that there is no old component listener
+			// necessary because this class is cloned if reusing popup windows
+			for( ComponentListener l : popupWindow.getComponentListeners() ) {
+				if( l instanceof DropShadowPopup )
+					popupWindow.removeComponentListener( l );
+			}
+		}
+
+		//---- interface ComponentListener ----
+
+		@Override
+		public void componentResized( ComponentEvent e ) {
+			if( e.getSource() == popupWindow )
+				updateDropShadowWindowBounds();
+		}
+
+		@Override
+		public void componentMoved( ComponentEvent e ) {
+			if( e.getSource() == popupWindow )
+				updateDropShadowWindowBounds();
+		}
+
+		@Override public void componentShown( ComponentEvent e ) {}
+		@Override public void componentHidden( ComponentEvent e ) {}
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPopupMenuBorder.java

@@ -23,7 +23,7 @@ import java.awt.Insets;
 import java.util.Map;
 import javax.swing.JScrollPane;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableBorder;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -37,7 +37,7 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatPopupMenuBorder
 	extends FlatLineBorder
-	implements StyleableBorder
+	implements StyleableObject
 {
 	private Color borderColor;
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPopupMenuUI.java

@@ -193,27 +193,38 @@ public class FlatPopupMenuUI
 
 	@Override
 	public Popup getPopup( JPopupMenu popup, int x, int y ) {
+		Dimension popupSize = popup.getPreferredSize();
+		Rectangle screenBounds = getScreenBoundsAt( x, y );
+
+		// make sure that popup does not overlap any task/side bar
+		if( x + popupSize.width > screenBounds.x + screenBounds.width )
+			x = screenBounds.x + screenBounds.width - popupSize.width;
+		if( y + popupSize.height > screenBounds.y + screenBounds.height )
+			y = screenBounds.y + screenBounds.height - popupSize.height;
+		if( x < screenBounds.x )
+			x = screenBounds.x;
+		if( y < screenBounds.y )
+			y = screenBounds.y;
+
 		// do not add scroller to combobox popups or to popups that already have a scroll pane
 		if( popup instanceof BasicComboPopup ||
 			(popup.getComponentCount() > 0 && popup.getComponent( 0 ) instanceof JScrollPane) )
 		  return super.getPopup( popup, x, y );
 
 		// do not add scroller if popup fits into screen
-		Dimension prefSize = popup.getPreferredSize();
-		int screenHeight = getScreenHeightAt( x, y );
-		if( prefSize.height <= screenHeight )
+		if( popupSize.height <= screenBounds.height )
 			return super.getPopup( popup, x, y );
 
 		// create scroller
 		FlatPopupScroller scroller = new FlatPopupScroller( popup );
-		scroller.setPreferredSize( new Dimension( prefSize.width, screenHeight ) );
+		scroller.setPreferredSize( new Dimension( popupSize.width, screenBounds.height ) );
 
 		// create popup
 		PopupFactory popupFactory = PopupFactory.getSharedInstance();
 		return popupFactory.getPopup( popup.getInvoker(), scroller, x, y );
 	}
 
-	private int getScreenHeightAt( int x, int y ) {
+	private Rectangle getScreenBoundsAt( int x, int y ) {
 		// find GraphicsConfiguration at popup location (similar to JPopupMenu.getCurrentGraphicsConfiguration())
 		GraphicsConfiguration gc = null;
 		for( GraphicsDevice device : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices() ) {
@@ -228,13 +239,15 @@ public class FlatPopupMenuUI
 		if( gc == null && popupMenu.getInvoker() != null )
 			gc = popupMenu.getInvoker().getGraphicsConfiguration();
 
-		// compute screen height
+		if( gc == null )
+			return new Rectangle( Toolkit.getDefaultToolkit().getScreenSize() );
+
+		// compute screen bounds
 		// (always subtract screen insets because there is no API to detect whether
 		// the popup can overlap the taskbar; see JPopupMenu.canPopupOverlapTaskBar())
-		Toolkit toolkit = Toolkit.getDefaultToolkit();
-		Rectangle screenBounds = (gc != null) ? gc.getBounds() : new Rectangle( toolkit.getScreenSize() );
-		Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
-		return screenBounds.height - screenInsets.top - screenInsets.bottom;
+		Rectangle screenBounds = gc.getBounds();
+		Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
+		return FlatUIUtils.subtractInsets( screenBounds, screenInsets );
 	}
 
 	//---- class FlatPopupMenuLayout ------------------------------------------

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatProgressBarUI.java

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import static com.formdev.flatlaf.FlatClientProperties.*;
 import java.awt.Dimension;
+import java.awt.EventQueue;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -86,6 +87,17 @@ public class FlatProgressBarUI
 		installStyle();
 	}
 
+	@Override
+	public void uninstallUI( JComponent c ) {
+		if( !EventQueue.isDispatchThread() && progressBar.isIndeterminate() ) {
+			LoggingFacade.INSTANCE.logSevere(
+				"FlatLaf: Uninstalling indeterminate progress bar UI not on AWT thread may throw NPE in FlatProgressBarUI.paint(). Use SwingUtilities.invokeLater().",
+				new IllegalStateException() );
+		}
+
+		super.uninstallUI( c );
+	}
+
 	@Override
 	protected void installDefaults() {
 		super.installDefaults();
@@ -110,17 +122,25 @@ public class FlatProgressBarUI
 
 		propertyChangeListener = e -> {
 			switch( e.getPropertyName() ) {
+				case "indeterminate":
+					if( !EventQueue.isDispatchThread() && !progressBar.isIndeterminate() ) {
+						LoggingFacade.INSTANCE.logSevere(
+							"FlatLaf: Using JProgressBar.setIndeterminate(false) not on AWT thread may throw NPE in FlatProgressBarUI.paint(). Use SwingUtilities.invokeLater().",
+							new IllegalStateException() );
+					}
+					break;
+
 				case PROGRESS_BAR_LARGE_HEIGHT:
 				case PROGRESS_BAR_SQUARE:
 					progressBar.revalidate();
-					progressBar.repaint();
+					HiDPIUtils.repaint( progressBar );
 					break;
 
 				case STYLE:
 				case STYLE_CLASS:
 					installStyle();
 					progressBar.revalidate();
-					progressBar.repaint();
+					HiDPIUtils.repaint( progressBar );
 					break;
 			}
 		};
@@ -274,6 +294,6 @@ public class FlatProgressBarUI
 		// Only solution is to repaint whole progress bar.
 		double systemScaleFactor = UIScale.getSystemScaleFactor( progressBar.getGraphicsConfiguration() );
 		if( (int) systemScaleFactor != systemScaleFactor )
-			progressBar.repaint();
+			HiDPIUtils.repaint( progressBar );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRadioButtonMenuItemUI.java

@@ -23,6 +23,7 @@ import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
+import javax.swing.JMenuItem;
 import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicMenuItemUI;
@@ -102,13 +103,23 @@ public class FlatRadioButtonMenuItemUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRadioButtonUI.java

@@ -35,16 +35,20 @@ import javax.swing.CellRendererPane;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicButtonListener;
+import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.plaf.basic.BasicRadioButtonUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.icons.FlatCheckBoxIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -158,6 +162,10 @@ public class FlatRadioButtonUI
 	/** @since 2 */
 	protected void propertyChange( AbstractButton b, PropertyChangeEvent e ) {
 		switch( e.getPropertyName() ) {
+			case BasicHTML.propertyKey:
+				FlatHTML.updateRendererCSSFontBaseSize( b );
+				break;
+
 			case FlatClientProperties.STYLE:
 			case FlatClientProperties.STYLE_CLASS:
 				if( shared && FlatStylingSupport.hasStyleProperty( b ) ) {
@@ -167,7 +175,7 @@ public class FlatRadioButtonUI
 				} else
 					installStyle( b );
 				b.revalidate();
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 		}
 	}
@@ -196,18 +204,22 @@ public class FlatRadioButtonUI
 	protected Object applyStyleProperty( AbstractButton b, String key, Object value ) {
 		// style icon
 		if( key.startsWith( "icon." ) ) {
-			if( !(icon instanceof FlatCheckBoxIcon) )
-				return new UnknownStyleException( key );
+			Icon icon = getRealIcon( b );
+			if( !(icon instanceof StyleableObject) )
+				throw new UnknownStyleException( key );
 
-			if( iconShared ) {
-				icon = FlatStylingSupport.cloneIcon( icon );
+			if( icon == this.icon && iconShared ) {
+				this.icon = icon = FlatStylingSupport.cloneIcon( icon );
 				iconShared = false;
 			}
 
 			key = key.substring( "icon.".length() );
-			return ((FlatCheckBoxIcon)icon).applyStyleProperty( key, value );
+			return ((StyleableObject)icon).applyStyleProperty( key, value );
 		}
 
+		if( "iconTextGap".equals( key ) && value instanceof Integer )
+			value = UIScale.scale( (Integer) value );
+
 		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, b, key, value );
 	}
 
@@ -215,8 +227,9 @@ public class FlatRadioButtonUI
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
 		Map<String, Class<?>> infos = FlatStylingSupport.getAnnotatedStyleableInfos( this );
-		if( icon instanceof FlatCheckBoxIcon ) {
-			for( Map.Entry<String, Class<?>> e : ((FlatCheckBoxIcon)icon).getStyleableInfos().entrySet() )
+		Icon icon = getRealIcon( c );
+		if( icon instanceof StyleableObject ) {
+			for( Map.Entry<String, Class<?>> e : ((StyleableObject)icon).getStyleableInfos().entrySet() )
 				infos.put( "icon.".concat( e.getKey() ), e.getValue() );
 		}
 		return infos;
@@ -227,8 +240,9 @@ public class FlatRadioButtonUI
 	public Object getStyleableValue( JComponent c, String key ) {
 		// style icon
 		if( key.startsWith( "icon." ) ) {
-			return (icon instanceof FlatCheckBoxIcon)
-				? ((FlatCheckBoxIcon)icon).getStyleableValue( key.substring( "icon.".length() ) )
+			Icon icon = getRealIcon( c );
+			return (icon instanceof StyleableObject)
+				? ((StyleableObject)icon).getStyleableValue( key.substring( "icon.".length() ) )
 				: null;
 		}
 
@@ -259,7 +273,7 @@ public class FlatRadioButtonUI
 
 	@Override
 	public void paint( Graphics g, JComponent c ) {
-		// fill background even if not opaque if
+		// fill background even if not opaque and if:
 		// - contentAreaFilled is true and
 		// - if background color is different to default background color
 		// (this paints selection if using the component as cell renderer)
@@ -275,20 +289,27 @@ public class FlatRadioButtonUI
 		int focusWidth = getIconFocusWidth( c );
 		if( focusWidth > 0 ) {
 			boolean ltr = c.getComponentOrientation().isLeftToRight();
+			int halign = ((AbstractButton)c).getHorizontalAlignment();
+			if( halign == SwingConstants.LEADING )
+				halign = ltr ? SwingConstants.LEFT : SwingConstants.RIGHT;
+			else if( halign == SwingConstants.TRAILING )
+				halign = ltr ? SwingConstants.RIGHT : SwingConstants.LEFT;
+
 			Insets insets = c.getInsets( tempInsets );
-			int leftOrRightInset = ltr ? insets.left : insets.right;
-			if( focusWidth > leftOrRightInset ) {
+			if( (focusWidth > insets.left || focusWidth > insets.right) &&
+				(halign == SwingConstants.LEFT || halign == SwingConstants.RIGHT) )
+			{
 				// The left (or right) inset is smaller than the focus width, which may be
 				// the case if insets were explicitly reduced (e.g. with an EmptyBorder).
 				// In this case the width has been increased in getPreferredSize() and
 				// here it is necessary to fix icon and text painting location.
-				int offset = focusWidth - leftOrRightInset;
-				if( !ltr )
-					offset = -offset;
+				int offset = (halign == SwingConstants.LEFT)
+					? Math.max( focusWidth - insets.left, 0 )
+					: -Math.max( focusWidth - insets.right, 0 );
 
 				// move the graphics origin to the left (or right)
 				g.translate( offset, 0 );
-				super.paint( g, c );
+				super.paint( FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c ), c );
 				g.translate( -offset, 0 );
 				return;
 			}
@@ -315,16 +336,23 @@ public class FlatRadioButtonUI
 	}
 
 	private int getIconFocusWidth( JComponent c ) {
-		AbstractButton b = (AbstractButton) c;
-		Icon icon = b.getIcon();
-		if( icon == null )
-			icon = getDefaultIcon();
-
+		Icon icon = getRealIcon( c );
 		return (icon instanceof FlatCheckBoxIcon)
 			? Math.round( UIScale.scale( ((FlatCheckBoxIcon)icon).getFocusWidth() ) )
 			: 0;
 	}
 
+	private Icon getRealIcon( JComponent c ) {
+		AbstractButton b = (AbstractButton) c;
+		Icon icon = b.getIcon();
+		return (icon != null) ? icon : getDefaultIcon();
+	}
+
+	@Override
+	public int getBaseline( JComponent c, int width, int height ) {
+		return FlatButtonUI.getBaselineImpl( c, width, height );
+	}
+
 	//---- class FlatRadioButtonListener --------------------------------------
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRootPaneUI.java

@@ -20,18 +20,19 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Container;
 import java.awt.Dimension;
+import java.awt.EventQueue;
 import java.awt.Frame;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.IllegalComponentStateException;
 import java.awt.Insets;
 import java.awt.LayoutManager;
 import java.awt.LayoutManager2;
 import java.awt.Window;
-import java.awt.event.ComponentAdapter;
-import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import java.util.Objects;
 import java.util.function.Function;
 import javax.swing.JComponent;
 import javax.swing.JDialog;
@@ -40,7 +41,6 @@ import javax.swing.JLayeredPane;
 import javax.swing.JMenuBar;
 import javax.swing.JRootPane;
 import javax.swing.LookAndFeel;
-import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.border.Border;
 import javax.swing.plaf.BorderUIResource;
@@ -87,8 +87,8 @@ public class FlatRootPaneUI
 
 	private Object nativeWindowBorderData;
 	private LayoutManager oldLayout;
-	private PropertyChangeListener ancestorListener;
-	private ComponentListener componentListener;
+	private ComponentListener macFullWindowContentListener;
+	private PropertyChangeListener macWindowBackgroundListener;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatRootPaneUI();
@@ -106,6 +106,7 @@ public class FlatRootPaneUI
 			installBorder();
 
 		installNativeWindowBorder();
+		macInstallFullWindowContentSupport();
 	}
 
 	protected void installBorder() {
@@ -122,6 +123,7 @@ public class FlatRootPaneUI
 
 		uninstallNativeWindowBorder();
 		uninstallClientDecorations();
+		macUninstallFullWindowContentSupport();
 		rootPane = null;
 	}
 
@@ -152,13 +154,31 @@ public class FlatRootPaneUI
 		Container parent = c.getParent();
 		if( parent instanceof JFrame || parent instanceof JDialog ) {
 			Color background = parent.getBackground();
-			if( background == null || background instanceof UIResource )
-				parent.setBackground( UIManager.getColor( "control" ) );
+			if( background == null || background instanceof UIResource ) {
+				if( SystemInfo.isMacOS ) {
+					// Setting window background on macOS immediately fills the whole window
+					// with that color, and slightly delayed, the Swing repaint manager
+					// repaints the actual window content. This results in some flashing
+					// when switching from a light to a dark theme (or vice versa).
+					// --> delay setting window background and immediately repaint window content
+					Runnable r = () -> {
+						parent.setBackground( UIManager.getColor( "control" ) );
+						c.paintImmediately( 0, 0, c.getWidth(), c.getHeight() );
+					};
+
+					// for class FlatAnimatedLafChange:
+					// if animated Laf change is in progress, set background color when
+					// animation has finished to avoid/reduce flashing
+					if( c.getClientProperty( "FlatLaf.internal.animatedLafChange" ) != null )
+						c.putClientProperty( "FlatLaf.internal.animatedLafChange.runWhenFinished", r );
+					else
+						EventQueue.invokeLater( r );
+				} else
+					parent.setBackground( UIManager.getColor( "control" ) );
+			}
 		}
 
-		// enable dark window appearance on macOS when running in JetBrains Runtime
-		if( SystemInfo.isJetBrainsJVM && SystemInfo.isMacOS_10_14_Mojave_orLater )
-			c.putClientProperty( "jetbrains.awt.windowDarkAppearance", FlatLaf.isLafDark() );
+		macClearBackgroundForTranslucentWindow( c );
 	}
 
 	@Override
@@ -178,55 +198,20 @@ public class FlatRootPaneUI
 	protected void installListeners( JRootPane root ) {
 		super.installListeners( root );
 
-		if( SystemInfo.isJava_9_orLater ) {
-			// On HiDPI screens, where scaling is used, there may be white lines on the
-			// bottom and on the right side of the window when it is initially shown.
-			// This is very disturbing in dark themes, but hard to notice in light themes.
-			// Seems to be a rounding issue when Swing adds dirty region of window
-			// using RepaintManager.nativeAddDirtyRegion().
-			//
-			// Note: Not using a HierarchyListener here, which would be much easier,
-			// because this causes problems with mouse clicks in heavy-weight popups.
-			// Instead, add a listener to the root pane that waits until it is added
-			// to a window, then add a component listener to the window.
-			// See: https://github.com/JFormDesigner/FlatLaf/issues/371
-			ancestorListener = e -> {
-				Object oldValue = e.getOldValue();
-				Object newValue = e.getNewValue();
-				if( newValue instanceof Window ) {
-					if( componentListener == null ) {
-						componentListener = new ComponentAdapter() {
-							@Override
-							public void componentShown( ComponentEvent e ) {
-								// add whole root pane to dirty regions when window is initially shown
-								root.getParent().repaint( root.getX(), root.getY(), root.getWidth(), root.getHeight() );
-							}
-						};
-					}
-					((Window)newValue).addComponentListener( componentListener );
-				} else if( newValue == null && oldValue instanceof Window ) {
-					if( componentListener != null )
-						((Window)oldValue).removeComponentListener( componentListener );
-				}
-			};
-			root.addPropertyChangeListener( "ancestor", ancestorListener );
-		}
+		if( SystemInfo.isMacFullWindowContentSupported )
+			macFullWindowContentListener = FullWindowContentSupport.macInstallListeners( root );
+		macInstallWindowBackgroundListener( root );
 	}
 
 	@Override
 	protected void uninstallListeners( JRootPane root ) {
 		super.uninstallListeners( root );
 
-		if( SystemInfo.isJava_9_orLater ) {
-			if( componentListener != null ) {
-				Window window = SwingUtilities.windowForComponent( root );
-				if( window != null )
-					window.removeComponentListener( componentListener );
-				componentListener = null;
-			}
-			root.removePropertyChangeListener( "ancestor", ancestorListener );
-			ancestorListener = null;
+		if( SystemInfo.isMacFullWindowContentSupported ) {
+			FullWindowContentSupport.macUninstallListeners( root, macFullWindowContentListener );
+			macFullWindowContentListener = null;
 		}
+		macUninstallWindowBackgroundListener( root );
 	}
 
 	/** @since 1.1.2 */
@@ -306,19 +291,141 @@ public class FlatRootPaneUI
 
 	// layer title pane under frame content layer to allow placing menu bar over title pane
 	protected final static Integer TITLE_PANE_LAYER = JLayeredPane.FRAME_CONTENT_LAYER - 1;
+	private final static Integer TITLE_PANE_MOUSE_LAYER = JLayeredPane.FRAME_CONTENT_LAYER - 2;
+	private final static Integer WINDOW_TOP_BORDER_LAYER = Integer.MAX_VALUE;
+
+	// for fullWindowContent mode, layer title pane over frame content layer to allow placing title bar buttons over content
+	/** @since 3.4 */
+	protected final static Integer TITLE_PANE_FULL_WINDOW_CONTENT_LAYER = JLayeredPane.FRAME_CONTENT_LAYER + 1;
+
+	private Integer getLayerForTitlePane() {
+		return isFullWindowContent( rootPane ) ? TITLE_PANE_FULL_WINDOW_CONTENT_LAYER : TITLE_PANE_LAYER;
+	}
 
 	protected void setTitlePane( FlatTitlePane newTitlePane ) {
 		JLayeredPane layeredPane = rootPane.getLayeredPane();
 
-		if( titlePane != null )
+		if( titlePane != null ) {
 			layeredPane.remove( titlePane );
+			layeredPane.remove( titlePane.mouseLayer );
+			if( titlePane.windowTopBorderLayer != null )
+				layeredPane.remove( titlePane.windowTopBorderLayer );
+		}
 
-		if( newTitlePane != null )
-			layeredPane.add( newTitlePane, TITLE_PANE_LAYER );
+		if( newTitlePane != null ) {
+			layeredPane.add( newTitlePane, getLayerForTitlePane() );
+			layeredPane.add( newTitlePane.mouseLayer, TITLE_PANE_MOUSE_LAYER );
+			if( newTitlePane.windowTopBorderLayer != null && newTitlePane.isWindowTopBorderNeeded() && isFullWindowContent( rootPane ) )
+				layeredPane.add( newTitlePane.windowTopBorderLayer, WINDOW_TOP_BORDER_LAYER );
+		}
 
 		titlePane = newTitlePane;
 	}
 
+	private void macInstallFullWindowContentSupport() {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		// set window buttons spacing
+		if( isMacButtonsSpacingSupported() && rootPane.isDisplayable() ) {
+			int buttonsSpacing = FlatNativeMacLibrary.BUTTONS_SPACING_DEFAULT;
+			String value = (String) rootPane.getClientProperty( FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING );
+			if( value != null ) {
+				switch( value ) {
+					case FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING_MEDIUM:
+						buttonsSpacing = FlatNativeMacLibrary.BUTTONS_SPACING_MEDIUM;
+						break;
+
+					case FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING_LARGE:
+						buttonsSpacing = FlatNativeMacLibrary.BUTTONS_SPACING_LARGE;
+						break;
+				}
+			}
+
+			FlatNativeMacLibrary.setWindowButtonsSpacing( getParentWindow( rootPane ), buttonsSpacing );
+		}
+
+		// update buttons bounds client property
+		FullWindowContentSupport.macUpdateFullWindowContentButtonsBoundsProperty( rootPane );
+	}
+
+	private void macUninstallFullWindowContentSupport() {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		// do not uninstall when switching to another FlatLaf theme
+		if( UIManager.getLookAndFeel() instanceof FlatLaf )
+			return;
+
+		// reset window buttons spacing
+		if( isMacButtonsSpacingSupported() )
+			FlatNativeMacLibrary.setWindowButtonsSpacing( getParentWindow( rootPane ), FlatNativeMacLibrary.BUTTONS_SPACING_DEFAULT );
+
+		// remove buttons bounds client property
+		FullWindowContentSupport.macUninstallFullWindowContentButtonsBoundsProperty( rootPane );
+	}
+
+	private boolean isMacButtonsSpacingSupported() {
+		return SystemInfo.isMacOS && SystemInfo.isJava_17_orLater && FlatNativeMacLibrary.isLoaded();
+	}
+
+	private void macInstallWindowBackgroundListener( JRootPane c ) {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		Window window = getParentWindow( c );
+		if( window != null && macWindowBackgroundListener == null ) {
+			macWindowBackgroundListener = e -> macClearBackgroundForTranslucentWindow( c );
+			window.addPropertyChangeListener( "background", macWindowBackgroundListener );
+		}
+	}
+
+	private void macUninstallWindowBackgroundListener( JRootPane c ) {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		Window window = getParentWindow( c );
+		if( window != null && macWindowBackgroundListener != null ) {
+			window.removePropertyChangeListener( "background", macWindowBackgroundListener );
+			macWindowBackgroundListener = null;
+		}
+	}
+
+	/**
+	 * When setting window background to translucent color (alpha < 255),
+	 * Swing paints that window translucent on Windows and Linux, but not on macOS.
+	 * The reason for this is that FlatLaf sets the background color of the root pane,
+	 * and Swing behaves a bit differently on macOS than on other platforms in that case.
+	 * Other L&Fs do not set root pane background, which is {@code null} by default.
+	 * <p>
+	 * To fix this problem, set the root pane background to {@code null}
+	 * if windows uses a translucent background.
+	 */
+	private void macClearBackgroundForTranslucentWindow( JRootPane c ) {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		Window window = getParentWindow( c );
+		if( window != null ) {
+			Color windowBackground = window.getBackground();
+			if( windowBackground != null &&
+				windowBackground.getAlpha() < 255 &&
+				c.getBackground() instanceof UIResource )
+			{
+				// clear root pane background
+				c.setBackground( null );
+			}
+		}
+	}
+
+	private Window getParentWindow( JRootPane c ) {
+		// not using SwingUtilities.windowForComponent() or SwingUtilities.getWindowAncestor()
+		// here because root panes may be nested and used anywhere (e.g. in JInternalFrame)
+		// but we're only interested in the "root" root pane, which is a direct child of the window
+		Container parent = c.getParent();
+		return (parent instanceof Window) ? (Window) parent : null;
+	}
+
 	@Override
 	public void propertyChange( PropertyChangeEvent e ) {
 		super.propertyChange( e );
@@ -363,17 +470,82 @@ public class FlatRootPaneUI
 					titlePane.titleBarColorsChanged();
 				break;
 
+			case FlatClientProperties.TITLE_BAR_HEIGHT:
+				if( titlePane != null )
+					titlePane.revalidate();
+				break;
+
+			case FlatClientProperties.FULL_WINDOW_CONTENT:
+				if( titlePane != null ) {
+					rootPane.getLayeredPane().setLayer( titlePane, getLayerForTitlePane() );
+					if( titlePane.windowTopBorderLayer != null ) {
+						JLayeredPane layeredPane = rootPane.getLayeredPane();
+						if( titlePane.isWindowTopBorderNeeded() && isFullWindowContent( rootPane ) )
+							layeredPane.add( titlePane.windowTopBorderLayer, WINDOW_TOP_BORDER_LAYER );
+						else
+							layeredPane.remove( titlePane.windowTopBorderLayer );
+					}
+					titlePane.updateIcon();
+					titlePane.updateVisibility();
+					titlePane.updateFullWindowContentButtonsBoundsProperty();
+				}
+				FullWindowContentSupport.revalidatePlaceholders( rootPane );
+				rootPane.revalidate();
+				break;
+
+			case FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS:
+				FullWindowContentSupport.revalidatePlaceholders( rootPane );
+				break;
+
 			case FlatClientProperties.GLASS_PANE_FULL_HEIGHT:
 				rootPane.revalidate();
 				break;
+
+			case FlatClientProperties.WINDOW_STYLE:
+				if( rootPane.isDisplayable() )
+					throw new IllegalComponentStateException( "The client property 'Window.style' must be set before the window becomes displayable." );
+				break;
+
+			case "ancestor":
+				if( e.getNewValue() instanceof Window ) {
+					if( titlePane != null && !Objects.equals( titlePane.windowStyle, FlatTitlePane.getWindowStyle( rootPane ) ) )
+						setTitlePane( createTitlePane() );
+
+					macClearBackgroundForTranslucentWindow( rootPane );
+				}
+
+				macUninstallWindowBackgroundListener( rootPane );
+				macInstallWindowBackgroundListener( rootPane );
+
+				// FlatNativeMacLibrary.setWindowButtonsSpacing() and
+				// FullWindowContentSupport.macUpdateFullWindowContentButtonsBoundsProperty()
+				// require a native window, but setting the client properties
+				// "apple.awt.fullWindowContent" or FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING
+				// is usually done before the native window is created
+				// --> try again when native window is created
+				if( e.getNewValue() instanceof Window )
+					macInstallFullWindowContentSupport();
+				break;
+
+			case FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING:
+				macInstallFullWindowContentSupport();
+				break;
+
+			case "apple.awt.fullWindowContent":
+				if( SystemInfo.isMacFullWindowContentSupported )
+					FullWindowContentSupport.macUpdateFullWindowContentButtonsBoundsProperty( rootPane );
+				break;
 		}
 	}
 
+	/** @since 3.4 */
+	protected static boolean isFullWindowContent( JRootPane rootPane ) {
+		return FlatClientProperties.clientPropertyBoolean( rootPane, FlatClientProperties.FULL_WINDOW_CONTENT, false );
+	}
+
 	protected static boolean isMenuBarEmbedded( JRootPane rootPane ) {
-		RootPaneUI ui = rootPane.getUI();
-		return ui instanceof FlatRootPaneUI &&
-			((FlatRootPaneUI)ui).titlePane != null &&
-			((FlatRootPaneUI)ui).titlePane.isMenuBarEmbedded();
+		FlatTitlePane titlePane = getTitlePane( rootPane );
+		return titlePane != null && titlePane.isMenuBarEmbedded();
 	}
 
 	/** @since 2.4 */
@@ -409,23 +581,21 @@ public class FlatRootPaneUI
 		private Dimension computeLayoutSize( Container parent, Function<Component, Dimension> getSizeFunc ) {
 			JRootPane rootPane = (JRootPane) parent;
 
-			Dimension titlePaneSize = (titlePane != null)
-				? getSizeFunc.apply( titlePane )
-				: new Dimension();
 			Dimension contentSize = (rootPane.getContentPane() != null)
 				? getSizeFunc.apply( rootPane.getContentPane() )
-				: rootPane.getSize();
+				: rootPane.getSize(); // same as in JRootPane.RootLayout.preferredLayoutSize()
 
 			int width = contentSize.width; // title pane width is not considered here
-			int height = titlePaneSize.height + contentSize.height;
+			int height = contentSize.height;
+			if( titlePane != null && !isFullWindowContent( rootPane ) )
+				height += getSizeFunc.apply( titlePane ).height;
 			if( titlePane == null || !titlePane.isMenuBarEmbedded() ) {
 				JMenuBar menuBar = rootPane.getJMenuBar();
-				Dimension menuBarSize = (menuBar != null && menuBar.isVisible())
-					? getSizeFunc.apply( menuBar )
-					: new Dimension();
-
-				width = Math.max( width, menuBarSize.width );
-				height += menuBarSize.height;
+				if( menuBar != null && menuBar.isVisible() ) {
+					Dimension menuBarSize = getSizeFunc.apply( menuBar );
+					width = Math.max( width, menuBarSize.width );
+					height += menuBarSize.height;
+				}
 			}
 
 			Insets insets = rootPane.getInsets();
@@ -450,12 +620,29 @@ public class FlatRootPaneUI
 			if( rootPane.getLayeredPane() != null )
 				rootPane.getLayeredPane().setBounds( x, y, width, height );
 
-			// title pane
+			// title pane (is a child of layered pane)
 			int nextY = 0;
 			if( titlePane != null ) {
 				int prefHeight = !isFullScreen ? titlePane.getPreferredSize().height : 0;
-				titlePane.setBounds( 0, 0, width, prefHeight );
-				nextY += prefHeight;
+				boolean isFullWindowContent = isFullWindowContent( rootPane );
+				if( isFullWindowContent && !UIManager.getBoolean( FlatTitlePane.KEY_DEBUG_SHOW_RECTANGLES ) ) {
+					// place title bar into top-right corner
+					int tw = Math.min( titlePane.getPreferredSize().width, width );
+					int tx = titlePane.getComponentOrientation().isLeftToRight() ? width - tw : 0;
+					titlePane.setBounds( tx, 0, tw, prefHeight );
+				} else
+					titlePane.setBounds( 0, 0, width, prefHeight );
+
+				titlePane.mouseLayer.setBounds( 0, 0, width, prefHeight );
+				if( titlePane.windowTopBorderLayer != null ) {
+					boolean show = isFullWindowContent && !titlePane.isWindowMaximized() && !isFullScreen;
+					if( show )
+						titlePane.windowTopBorderLayer.setBounds( 0, 0, width, 1 );
+					titlePane.windowTopBorderLayer.setVisible( show );
+				}
+
+				if( !isFullWindowContent )
+					nextY += prefHeight;
 			}
 
 			// glass pane
@@ -466,7 +653,7 @@ public class FlatRootPaneUI
 				rootPane.getGlassPane().setBounds( x, y + offset, width, height - offset );
 			}
 
-			// menu bar
+			// menu bar (is a child of layered pane)
 			JMenuBar menuBar = rootPane.getJMenuBar();
 			if( menuBar != null && menuBar.isVisible() ) {
 				boolean embedded = !isFullScreen && titlePane != null && titlePane.isMenuBarEmbedded();
@@ -474,13 +661,23 @@ public class FlatRootPaneUI
 					titlePane.validate();
 					menuBar.setBounds( titlePane.getMenuBarBounds() );
 				} else {
+					int mx = 0;
+					int mw = width;
+					if( titlePane != null && isFullWindowContent( rootPane ) ) {
+						// make menu bar width smaller to avoid that it overlaps title bar buttons
+						int tw = Math.min( titlePane.getPreferredSize().width, width );
+						mw -= tw;
+						if( !titlePane.getComponentOrientation().isLeftToRight() )
+							mx = tw;
+					}
+
 					Dimension prefSize = menuBar.getPreferredSize();
-					menuBar.setBounds( 0, nextY, width, prefSize.height );
+					menuBar.setBounds( mx, nextY, mw, prefSize.height );
 					nextY += prefSize.height;
 				}
 			}
 
-			// content pane
+			// content pane (is a child of layered pane)
 			Container contentPane = rootPane.getContentPane();
 			if( contentPane != null )
 				contentPane.setBounds( 0, nextY, width, Math.max( height - nextY, 0 ) );
@@ -493,7 +690,7 @@ public class FlatRootPaneUI
 		@Override
 		public void invalidateLayout( Container parent ) {
 			if( titlePane != null )
-				titlePane.menuBarChanged();
+				titlePane.menuBarInvalidate();
 		}
 
 		@Override
@@ -513,7 +710,7 @@ public class FlatRootPaneUI
 	 * Window border used for non-native window decorations.
 	 */
 	public static class FlatWindowBorder
-		extends BorderUIResource.EmptyBorderUIResource
+		extends FlatEmptyBorder
 	{
 		protected final Color activeBorderColor = UIManager.getColor( "RootPane.activeBorderColor" );
 		protected final Color inactiveBorderColor = UIManager.getColor( "RootPane.inactiveBorderColor" );
@@ -546,7 +743,10 @@ public class FlatRootPaneUI
 		}
 
 		private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-			g.drawRect( x, y, width - 1, height - 1 );
+			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+			float lineWidth = (float) (UIScale.scale( 1f ) * scaleFactor);
+			g.fill( FlatUIUtils.createRectangle( x, y, width, height, lineWidth ) );
+			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
 		}
 
 		protected boolean isWindowMaximized( Component c ) {

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java

@@ -43,6 +43,7 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
@@ -212,14 +213,14 @@ public class FlatScrollBarUI
 			switch( e.getPropertyName() ) {
 				case FlatClientProperties.SCROLL_BAR_SHOW_BUTTONS:
 					scrollbar.revalidate();
-					scrollbar.repaint();
+					HiDPIUtils.repaint( scrollbar );
 					break;
 
 				case FlatClientProperties.STYLE:
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					scrollbar.revalidate();
-					scrollbar.repaint();
+					HiDPIUtils.repaint( scrollbar );
 					break;
 
 				case "componentOrientation":
@@ -245,7 +246,7 @@ public class FlatScrollBarUI
 								// because scroll bars do not receive mouse exited event.
 								// The scroll pane, including its scroll bars, is not part
 								// of the component hierarchy and does not receive mouse events
-								// directly. Instead LWComponentPeer receives mouse events
+								// directly. Instead, LWComponentPeer receives mouse events
 								// and delegates them to peers, but entered/exited events
 								// are sent only for the whole scroll pane.
 								// Exited event is only sent when mouse leaves scroll pane.
@@ -492,7 +493,7 @@ public class FlatScrollBarUI
 
 		private void repaint() {
 			if( scrollbar.isEnabled() )
-				scrollbar.repaint();
+				HiDPIUtils.repaint( scrollbar );
 		}
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollPaneBorder.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2023 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Component;
+import java.awt.Insets;
+import javax.swing.JList;
+import javax.swing.JScrollPane;
+import javax.swing.JTable;
+import javax.swing.JTree;
+import javax.swing.UIManager;
+import javax.swing.text.JTextComponent;
+import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * Border for {@link javax.swing.JScrollPane}.
+ *
+ * @uiDefault ScrollPane.arc				int
+ * @uiDefault ScrollPane.List.arc			int
+ * @uiDefault ScrollPane.Table.arc			int
+ * @uiDefault ScrollPane.TextComponent.arc	int
+ * @uiDefault ScrollPane.Tree.arc			int
+
+ * @author Karl Tauber
+ * @since 3.3
+ */
+public class FlatScrollPaneBorder
+	extends FlatBorder
+{
+	@Styleable protected int arc = UIManager.getInt( "ScrollPane.arc" );
+
+	private boolean isArcStyled;
+	private final int listArc = FlatUIUtils.getUIInt( "ScrollPane.List.arc", -1 );
+	private final int tableArc = FlatUIUtils.getUIInt( "ScrollPane.Table.arc", -1 );
+	private final int textComponentArc = FlatUIUtils.getUIInt( "ScrollPane.TextComponent.arc", -1 );
+	private final int treeArc = FlatUIUtils.getUIInt( "ScrollPane.Tree.arc", -1 );
+
+	@Override
+	public Object applyStyleProperty( String key, Object value ) {
+		Object oldValue = super.applyStyleProperty( key, value );
+
+		if( "arc".equals( key ) )
+			isArcStyled = true;
+
+		return oldValue;
+	}
+
+	@Override
+	public Insets getBorderInsets( Component c, Insets insets ) {
+		insets = super.getBorderInsets( c, insets );
+
+		// if view is rounded, increase left and right insets to avoid that the viewport
+		// is painted over the rounded border on the corners
+		int padding = getLeftRightPadding( c );
+		if( padding > 0 ) {
+			insets.left += padding;
+			insets.right += padding;
+		}
+
+		return insets;
+	}
+
+	@Override
+	protected int getArc( Component c ) {
+		if( isCellEditor( c ) )
+			return 0;
+
+		if( isArcStyled )
+			return arc;
+
+		if( c instanceof JScrollPane ) {
+			Component view = FlatScrollPaneUI.getView( (JScrollPane) c );
+			if( listArc >= 0 && view instanceof JList )
+				return listArc;
+			if( tableArc >= 0 && view instanceof JTable )
+				return tableArc;
+			if( textComponentArc >= 0&& view instanceof JTextComponent )
+				return textComponentArc;
+			if( treeArc >= 0 && view instanceof JTree )
+				return treeArc;
+		}
+
+		return arc;
+	}
+
+	/**
+	 * Returns the scaled left/right padding used when arc is larger than zero.
+	 * <p>
+	 * This is the distance from the inside of the left border to the left side of the view component.
+	 * On the right side, this is the distance between the right side of the view component and
+	 * the vertical scrollbar. Or the inside of the right border if the scrollbar is hidden.
+	 */
+	public int getLeftRightPadding( Component c ) {
+		// Subtract lineWidth from radius because radius is given for the outside
+		// of the painted line, but insets from super already include lineWidth.
+		// Reduce padding by 10% to make padding slightly smaller because it is not recognizable
+		// when the view is minimally painted over the beginning of the border curve.
+		int arc = getArc( c );
+		return (arc > 0)
+			? Math.max( Math.round( UIScale.scale( ((arc / 2f) - getLineWidth( c )) * 0.9f ) ), 0 )
+			: 0;
+	}
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollPaneUI.java

@@ -17,9 +17,12 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Component;
+import java.awt.Container;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.KeyboardFocusManager;
+import java.awt.LayoutManager;
 import java.awt.Rectangle;
 import java.awt.event.ContainerEvent;
 import java.awt.event.ContainerListener;
@@ -41,16 +44,20 @@ import javax.swing.JTree;
 import javax.swing.JViewport;
 import javax.swing.LookAndFeel;
 import javax.swing.ScrollPaneConstants;
+import javax.swing.ScrollPaneLayout;
 import javax.swing.Scrollable;
 import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
+import javax.swing.border.Border;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicScrollPaneUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
+import com.formdev.flatlaf.util.UIScale;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JScrollPane}.
@@ -97,7 +104,13 @@ public class FlatScrollPaneUI
 		super.installUI( c );
 
 		int focusWidth = UIManager.getInt( "Component.focusWidth" );
-		LookAndFeel.installProperty( c, "opaque", focusWidth == 0 );
+		int arc = UIManager.getInt( "ScrollPane.arc" );
+		LookAndFeel.installProperty( c, "opaque", focusWidth == 0 && arc == 0 );
+
+		// install layout manager
+		LayoutManager layout = c.getLayout();
+		if( layout != null && layout.getClass() == ScrollPaneLayout.UIResource.class )
+			c.setLayout( createScrollPaneLayout() );
 
 		installStyle();
 
@@ -108,6 +121,10 @@ public class FlatScrollPaneUI
 	public void uninstallUI( JComponent c ) {
 		MigLayoutVisualPadding.uninstall( scrollpane );
 
+		// uninstall layout manager
+		if( c.getLayout() instanceof FlatScrollPaneLayout )
+			c.setLayout( new ScrollPaneLayout.UIResource() );
+
 		super.uninstallUI( c );
 
 		oldStyleValues = null;
@@ -130,6 +147,13 @@ public class FlatScrollPaneUI
 		handler = null;
 	}
 
+	/**
+	 * @since 3.3
+	 */
+	protected FlatScrollPaneLayout createScrollPaneLayout() {
+		return new FlatScrollPaneLayout();
+	}
+
 	@Override
 	protected MouseWheelListener createMouseWheelListener() {
 		MouseWheelListener superListener = super.createMouseWheelListener();
@@ -186,7 +210,7 @@ public class FlatScrollPaneUI
 
 			// Use (0, 0) view position to obtain a constant unit increment of first item.
 			// Unit increment may be different for each item.
-			Rectangle visibleRect = new Rectangle( viewport.getViewSize() );
+			Rectangle visibleRect = new Rectangle( viewport.getExtentSize() );
 			unitIncrement = scrollable.getScrollableUnitIncrement( visibleRect, orientation, 1 );
 
 			if( unitIncrement > 0 ) {
@@ -274,11 +298,11 @@ public class FlatScrollPaneUI
 					JScrollBar hsb = scrollpane.getHorizontalScrollBar();
 					if( vsb != null ) {
 						vsb.revalidate();
-						vsb.repaint();
+						HiDPIUtils.repaint( vsb );
 					}
 					if( hsb != null ) {
 						hsb.revalidate();
-						hsb.repaint();
+						HiDPIUtils.repaint( hsb );
 					}
 					break;
 
@@ -290,8 +314,7 @@ public class FlatScrollPaneUI
 					Object corner = e.getNewValue();
 					if( corner instanceof JButton &&
 						((JButton)corner).getBorder() instanceof FlatButtonBorder &&
-						scrollpane.getViewport() != null &&
-						scrollpane.getViewport().getView() instanceof JTable )
+						getView( scrollpane ) instanceof JTable )
 					{
 						((JButton)corner).setBorder( BorderFactory.createEmptyBorder() );
 						((JButton)corner).setFocusable( false );
@@ -299,14 +322,26 @@ public class FlatScrollPaneUI
 					break;
 
 				case FlatClientProperties.OUTLINE:
-					scrollpane.repaint();
+					HiDPIUtils.repaint( scrollpane );
 					break;
 
 				case FlatClientProperties.STYLE:
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					scrollpane.revalidate();
-					scrollpane.repaint();
+					HiDPIUtils.repaint( scrollpane );
+					break;
+
+				case "border":
+					Object newBorder = e.getNewValue();
+					if( newBorder != null && newBorder == UIManager.getBorder( "Table.scrollPaneBorder" ) ) {
+						// JTable.configureEnclosingScrollPaneUI() replaces the scrollpane border
+						// with another one --> re-apply style on new border
+						borderShared = null;
+						installStyle();
+						scrollpane.revalidate();
+						HiDPIUtils.repaint( scrollpane );
+					}
 					break;
 			}
 		};
@@ -334,9 +369,10 @@ public class FlatScrollPaneUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
-		if( key.equals( "focusWidth" ) ) {
+		if( key.equals( "focusWidth" ) || key.equals( "arc" ) ) {
 			int focusWidth = (value instanceof Integer) ? (int) value : UIManager.getInt( "Component.focusWidth" );
-			LookAndFeel.installProperty( scrollpane, "opaque", focusWidth == 0 );
+			int arc = (value instanceof Integer) ? (int) value : UIManager.getInt( "ScrollPane.arc" );
+			LookAndFeel.installProperty( scrollpane, "opaque", focusWidth == 0 && arc == 0 );
 		}
 
 		if( borderShared == null )
@@ -360,8 +396,8 @@ public class FlatScrollPaneUI
 	protected void updateViewport( PropertyChangeEvent e ) {
 		super.updateViewport( e );
 
-		JViewport oldViewport = (JViewport) (e.getOldValue());
-		JViewport newViewport = (JViewport) (e.getNewValue());
+		JViewport oldViewport = (JViewport) e.getOldValue();
+		JViewport newViewport = (JViewport) e.getNewValue();
 
 		removeViewportListeners( oldViewport );
 		addViewportListeners( newViewport );
@@ -402,13 +438,46 @@ public class FlatScrollPaneUI
 				c.getHeight() - insets.top - insets.bottom );
 		}
 
+		// if view is rounded, paint rounded background with view background color
+		// to ensure that free areas at left and right have same color as view
+		Component view;
+		float arc = getBorderArc( scrollpane );
+		if( arc > 0 && (view = getView( scrollpane )) != null ) {
+			float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
+
+			g.setColor( view.getBackground() );
+
+			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+			FlatUIUtils.paintComponentBackground( (Graphics2D) g, 0, 0, c.getWidth(), c.getHeight(), focusWidth, arc );
+			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+		}
+
 		paint( g, c );
 	}
 
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		Border viewportBorder = scrollpane.getViewportBorder();
+		if( viewportBorder != null ) {
+			Rectangle r = scrollpane.getViewportBorderBounds();
+			int padding = getBorderLeftRightPadding( scrollpane );
+			JScrollBar vsb = scrollpane.getVerticalScrollBar();
+			if( padding > 0 &&
+				vsb != null && vsb.isVisible() &&
+				scrollpane.getLayout() instanceof FlatScrollPaneLayout &&
+				((FlatScrollPaneLayout)scrollpane.getLayout()).canIncreaseViewportWidth( scrollpane ) )
+			{
+				boolean ltr = scrollpane.getComponentOrientation().isLeftToRight();
+				int extraWidth = Math.min( padding, vsb.getWidth() );
+				viewportBorder.paintBorder( scrollpane, g, r.x - (ltr ? 0 : extraWidth), r.y, r.width + extraWidth, r.height );
+			} else
+				viewportBorder.paintBorder( scrollpane, g, r.x, r.y, r.width, r.height );
+		}
+	}
+
 	/** @since 1.3 */
 	public static boolean isPermanentFocusOwner( JScrollPane scrollPane ) {
-		JViewport viewport = scrollPane.getViewport();
-		Component view = (viewport != null) ? viewport.getView() : null;
+		Component view = getView( scrollPane );
 		if( view == null )
 			return false;
 
@@ -428,6 +497,25 @@ public class FlatScrollPaneUI
 		return false;
 	}
 
+	static Component getView( JScrollPane scrollPane ) {
+		JViewport viewport = scrollPane.getViewport();
+		return (viewport != null) ? viewport.getView() : null;
+	}
+
+	private static float getBorderArc( JScrollPane scrollPane ) {
+		Border border = scrollPane.getBorder();
+		return (border instanceof FlatScrollPaneBorder)
+			? UIScale.scale( (float) ((FlatScrollPaneBorder)border).getArc( scrollPane ) )
+			: 0;
+	}
+
+	private static int getBorderLeftRightPadding( JScrollPane scrollPane ) {
+		Border border = scrollPane.getBorder();
+		return (border instanceof FlatScrollPaneBorder)
+			? ((FlatScrollPaneBorder)border).getLeftRightPadding( scrollPane )
+			: 0;
+	}
+
 	//---- class Handler ------------------------------------------------------
 
 	/**
@@ -450,13 +538,71 @@ public class FlatScrollPaneUI
 		@Override
 		public void focusGained( FocusEvent e ) {
 			// necessary to update focus border
-			scrollpane.repaint();
+			if( scrollpane.getBorder() instanceof FlatBorder )
+				HiDPIUtils.repaint( scrollpane );
 		}
 
 		@Override
 		public void focusLost( FocusEvent e ) {
 			// necessary to update focus border
-			scrollpane.repaint();
+			if( scrollpane.getBorder() instanceof FlatBorder )
+				HiDPIUtils.repaint( scrollpane );
+		}
+	}
+
+	//---- class FlatScrollPaneLayout -----------------------------------------
+
+	/**
+	 * @since 3.3
+	 */
+	protected static class FlatScrollPaneLayout
+		extends ScrollPaneLayout.UIResource
+	{
+		@Override
+		public void layoutContainer( Container parent ) {
+			super.layoutContainer( parent );
+
+			JScrollPane scrollPane = (JScrollPane) parent;
+			int padding = getBorderLeftRightPadding( scrollPane );
+			if( padding > 0 && vsb != null && vsb.isVisible() ) {
+				// move vertical scrollbar to trailing edge
+				Insets insets = scrollPane.getInsets();
+				Rectangle r = vsb.getBounds();
+				int y = Math.max( r.y, insets.top + padding );
+				int y2 = Math.min( r.y + r.height, scrollPane.getHeight() - insets.bottom - padding );
+				boolean ltr = scrollPane.getComponentOrientation().isLeftToRight();
+
+				vsb.setBounds( r.x + (ltr ? padding : -padding), y, r.width, y2 - y );
+
+				// increase width of viewport, column header and horizontal scrollbar
+				if( canIncreaseViewportWidth( scrollPane ) ) {
+					int extraWidth = Math.min( padding, vsb.getWidth() );
+					resizeViewport( viewport, extraWidth, ltr );
+					resizeViewport( colHead, extraWidth, ltr );
+					resizeViewport( hsb, extraWidth, ltr );
+				}
+			}
+		}
+
+		boolean canIncreaseViewportWidth( JScrollPane scrollPane ) {
+			return scrollPane.getComponentOrientation().isLeftToRight()
+				? !isCornerVisible( upperRight ) && !isCornerVisible( lowerRight )
+				: !isCornerVisible( upperLeft ) && !isCornerVisible( lowerLeft );
+		}
+
+		private static boolean isCornerVisible( Component corner ) {
+			return corner != null &&
+				corner.getWidth() > 0 &&
+				corner.getHeight() > 0 &&
+				corner.isVisible();
+		}
+
+		private static void resizeViewport( Component c, int extraWidth, boolean ltr ) {
+			if( c == null )
+				return;
+
+			Rectangle vr = c.getBounds();
+			c.setBounds( vr.x - (ltr ? 0 : extraWidth), vr.y, vr.width + extraWidth, vr.height );
 		}
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatSeparatorUI.java

@@ -32,6 +32,7 @@ import javax.swing.plaf.basic.BasicSeparatorUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -134,7 +135,7 @@ public class FlatSeparatorUI
 				} else
 					installStyle( s );
 				s.revalidate();
-				s.repaint();
+				HiDPIUtils.repaint( s );
 				break;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatSliderUI.java

@@ -25,6 +25,8 @@ import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Rectangle;
 import java.awt.Shape;
+import java.awt.event.FocusEvent;
+import java.awt.event.FocusListener;
 import java.awt.event.MouseEvent;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
@@ -191,6 +193,23 @@ public class FlatSliderUI
 		return new FlatTrackListener();
 	}
 
+	@Override
+	protected FocusListener createFocusListener( JSlider slider ) {
+		return new BasicSliderUI.FocusHandler() {
+			@Override
+			public void focusGained( FocusEvent e ) {
+				super.focusGained( e );
+				HiDPIUtils.repaint( slider );
+			}
+
+			@Override
+			public void focusLost( FocusEvent e ) {
+				super.focusLost( e );
+				HiDPIUtils.repaint( slider );
+			}
+		};
+	}
+
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JSlider slider ) {
 		return FlatStylingSupport.createPropertyChangeListener( slider, this::installStyle,
@@ -422,7 +441,7 @@ debug*/
 		Color thumbColor, Color thumbBorderColor, Color focusedColor, float thumbBorderWidth, int focusWidth )
 	{
 		double systemScaleFactor = UIScale.getSystemScaleFactor( (Graphics2D) g );
-		if( systemScaleFactor != 1 && systemScaleFactor != 2 ) {
+		if( systemScaleFactor != (int) systemScaleFactor ) {
 			// paint at scale 1x to avoid clipping on right and bottom edges at 125%, 150% or 175%
 			HiDPIUtils.paintAtScale1x( (Graphics2D) g, thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height,
 				(g2d, x2, y2, width2, height2, scaleFactor) -> {
@@ -579,15 +598,15 @@ debug*/
 
 	@Override
 	public void setThumbLocation( int x, int y ) {
+		// set new thumb location and compute union of old and new thumb bounds
+		Rectangle r = new Rectangle( thumbRect );
+		thumbRect.setLocation( x, y );
+		SwingUtilities.computeUnion( thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height, r );
+
 		if( !isRoundThumb() ) {
 			// the needle of the directional thumb is painted outside of thumbRect
 			// --> must increase repaint rectangle
 
-			// set new thumb location and compute union of old and new thumb bounds
-			Rectangle r = new Rectangle( thumbRect );
-			thumbRect.setLocation( x, y );
-			SwingUtilities.computeUnion( thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height, r );
-
 			// increase union rectangle for repaint
 			int extra = (int) Math.ceil( UIScale.scale( focusWidth ) * 0.4142f );
 			if( slider.getOrientation() == JSlider.HORIZONTAL )
@@ -597,10 +616,9 @@ debug*/
 				if( !slider.getComponentOrientation().isLeftToRight() )
 					r.x -= extra;
 			}
+		}
 
-			slider.repaint( r );
-		} else
-			super.setThumbLocation( x, y );
+		HiDPIUtils.repaint( slider, r );
 	}
 
 	//---- class FlatTrackListener --------------------------------------------
@@ -688,21 +706,21 @@ debug*/
 				!UIManager.getBoolean( "Slider.snapToTicksOnReleased" ) )
 			{
 				calculateThumbLocation();
-				slider.repaint();
+				HiDPIUtils.repaint( slider );
 			}
 		}
 
 		protected void setThumbHover( boolean hover ) {
 			if( hover != thumbHover ) {
 				thumbHover = hover;
-				slider.repaint( thumbRect );
+				HiDPIUtils.repaint( slider, thumbRect );
 			}
 		}
 
 		protected void setThumbPressed( boolean pressed ) {
 			if( pressed != thumbPressed ) {
 				thumbPressed = pressed;
-				slider.repaint( thumbRect );
+				HiDPIUtils.repaint( slider, thumbRect );
 			}
 		}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatSpinnerUI.java

@@ -47,6 +47,7 @@ import javax.swing.plaf.basic.BasicSpinnerUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -67,7 +68,6 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * @uiDefault Component.minimumWidth			int
  * @uiDefault Spinner.buttonStyle				String	button (default), mac or none
  * @uiDefault Component.arrowType				String	chevron (default) or triangle
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault Spinner.disabledBackground		Color
  * @uiDefault Spinner.disabledForeground		Color
  * @uiDefault Spinner.focusedBackground			Color	optional
@@ -92,7 +92,6 @@ public class FlatSpinnerUI
 	@Styleable protected int minimumWidth;
 	@Styleable protected String buttonStyle;
 	@Styleable protected String arrowType;
-	protected boolean isIntelliJTheme;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color disabledForeground;
 	@Styleable protected Color focusedBackground;
@@ -129,7 +128,6 @@ public class FlatSpinnerUI
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
 		buttonStyle = UIManager.getString( "Spinner.buttonStyle" );
 		arrowType = UIManager.getString( "Component.arrowType" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		disabledBackground = UIManager.getColor( "Spinner.disabledBackground" );
 		disabledForeground = UIManager.getColor( "Spinner.disabledForeground" );
 		focusedBackground = UIManager.getColor( "Spinner.focusedBackground" );
@@ -142,8 +140,6 @@ public class FlatSpinnerUI
 		buttonHoverArrowColor = UIManager.getColor( "Spinner.buttonHoverArrowColor" );
 		buttonPressedArrowColor = UIManager.getColor( "Spinner.buttonPressedArrowColor" );
 		padding = UIManager.getInsets( "Spinner.padding" );
-
-		MigLayoutVisualPadding.install( spinner );
 	}
 
 	@Override
@@ -164,8 +160,6 @@ public class FlatSpinnerUI
 
 		oldStyleValues = null;
 		borderShared = null;
-
-		MigLayoutVisualPadding.uninstall( spinner );
 	}
 
 	@Override
@@ -175,6 +169,8 @@ public class FlatSpinnerUI
 		addEditorFocusListener( spinner.getEditor() );
 		spinner.addFocusListener( getHandler() );
 		spinner.addPropertyChangeListener( getHandler() );
+
+		MigLayoutVisualPadding.install( spinner );
 	}
 
 	@Override
@@ -186,6 +182,8 @@ public class FlatSpinnerUI
 		spinner.removePropertyChangeListener( getHandler() );
 
 		handler = null;
+
+		MigLayoutVisualPadding.uninstall( spinner );
 	}
 
 	private Handler getHandler() {
@@ -316,7 +314,7 @@ public class FlatSpinnerUI
 
 			return background;
 		} else
-			return isIntelliJTheme ? FlatUIUtils.getParentBackground( spinner ) : disabledBackground;
+			return disabledBackground;
 	}
 
 	protected Color getForeground( boolean enabled ) {
@@ -589,7 +587,7 @@ public class FlatSpinnerUI
 		@Override
 		public void focusGained( FocusEvent e ) {
 			// necessary to update focus border
-			spinner.repaint();
+			HiDPIUtils.repaint( spinner );
 
 			// if spinner gained focus, transfer it to the editor text field
 			if( e.getComponent() == spinner ) {
@@ -602,7 +600,7 @@ public class FlatSpinnerUI
 		@Override
 		public void focusLost( FocusEvent e ) {
 			// necessary to update focus border
-			spinner.repaint();
+			HiDPIUtils.repaint( spinner );
 		}
 
 		//---- interface PropertyChangeListener ----
@@ -617,7 +615,7 @@ public class FlatSpinnerUI
 
 				case FlatClientProperties.COMPONENT_ROUND_RECT:
 				case FlatClientProperties.OUTLINE:
-					spinner.repaint();
+					HiDPIUtils.repaint( spinner );
 					break;
 
 				case FlatClientProperties.MINIMUM_WIDTH:
@@ -628,7 +626,7 @@ public class FlatSpinnerUI
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					spinner.revalidate();
-					spinner.repaint();
+					HiDPIUtils.repaint( spinner );
 					break;
 			}
 		}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatSplitPaneUI.java

@@ -16,7 +16,9 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.Canvas;
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.Container;
 import java.awt.Cursor;
 import java.awt.Graphics;
@@ -67,6 +69,8 @@ import com.formdev.flatlaf.util.UIScale;
  * <!-- FlatSplitPaneUI -->
  *
  * @uiDefault Component.arrowType						String	chevron (default) or triangle
+ * @uiDefault SplitPaneDivider.hoverColor				Color	optional
+ * @uiDefault SplitPaneDivider.pressedColor				Color	optional
  * @uiDefault SplitPaneDivider.oneTouchArrowColor		Color
  * @uiDefault SplitPaneDivider.oneTouchHoverArrowColor	Color
  * @uiDefault SplitPaneDivider.oneTouchPressedArrowColor Color
@@ -80,14 +84,14 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatSplitPaneUI
 	extends BasicSplitPaneUI
-	implements StyleableUI
+	implements StyleableUI, FlatTitlePane.TitleBarCaptionHitTest
 {
 	@Styleable protected String arrowType;
+	/** @since 3.3 */ @Styleable protected Color draggingColor;
 	@Styleable protected Color oneTouchArrowColor;
 	@Styleable protected Color oneTouchHoverArrowColor;
 	@Styleable protected Color oneTouchPressedArrowColor;
 
-	private PropertyChangeListener propertyChangeListener;
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
@@ -105,6 +109,8 @@ public class FlatSplitPaneUI
 	protected void installDefaults() {
 		arrowType = UIManager.getString( "Component.arrowType" );
 
+		draggingColor = UIManager.getColor( "SplitPaneDivider.draggingColor" );
+
 		// get one-touch colors before invoking super.installDefaults() because they are
 		// used in there on LaF switching
 		oneTouchArrowColor = UIManager.getColor( "SplitPaneDivider.oneTouchArrowColor" );
@@ -118,6 +124,8 @@ public class FlatSplitPaneUI
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		draggingColor = null;
+
 		oneTouchArrowColor = null;
 		oneTouchHoverArrowColor = null;
 		oneTouchPressedArrowColor = null;
@@ -126,19 +134,9 @@ public class FlatSplitPaneUI
 	}
 
 	@Override
-	protected void installListeners() {
-		super.installListeners();
-
-		propertyChangeListener = FlatStylingSupport.createPropertyChangeListener( splitPane, this::installStyle, null );
-		splitPane.addPropertyChangeListener( propertyChangeListener );
-	}
-
-	@Override
-	protected void uninstallListeners() {
-		super.uninstallListeners();
-
-		splitPane.removePropertyChangeListener( propertyChangeListener );
-		propertyChangeListener = null;
+	protected PropertyChangeListener createPropertyChangeListener() {
+		return FlatStylingSupport.createPropertyChangeListener( splitPane, this::installStyle,
+			super.createPropertyChangeListener() );
 	}
 
 	@Override
@@ -194,12 +192,58 @@ public class FlatSplitPaneUI
 		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
 	}
 
+	@Override
+	protected Component createDefaultNonContinuousLayoutDivider() {
+		// only used for non-continuous layout if left or right component is heavy weight
+		return new Canvas() {
+			@Override
+			public void paint( Graphics g ) {
+				if( !isContinuousLayout() && getLastDragLocation() != -1 )
+					paintDragDivider( g, 0 );
+			}
+		};
+	}
+
+	@Override
+	public void finishedPaintingChildren( JSplitPane sp, Graphics g ) {
+		if( sp == splitPane && getLastDragLocation() != -1 && !isContinuousLayout() && !draggingHW )
+			paintDragDivider( g, getLastDragLocation() );
+	}
+
+	private void paintDragDivider( Graphics g, int dividerLocation ) {
+		// divider bounds
+		boolean horizontal = (getOrientation() == JSplitPane.HORIZONTAL_SPLIT);
+		int x = horizontal ? dividerLocation : 0;
+		int y = !horizontal ? dividerLocation : 0;
+		int width = horizontal ? dividerSize : splitPane.getWidth();
+		int height = !horizontal ? dividerSize : splitPane.getHeight();
+
+		// paint background
+		g.setColor( FlatUIUtils.deriveColor( draggingColor, splitPane.getBackground() ) );
+		g.fillRect( x, y, width, height );
+
+		// paint divider style (e.g. grip)
+		if( divider instanceof FlatSplitPaneDivider )
+			((FlatSplitPaneDivider)divider).paintStyle( g, x, y, width, height );
+	}
+
+	//---- interface FlatTitlePane.TitleBarCaptionHitTest ----
+
+	/** @since 3.4 */
+	@Override
+	public Boolean isTitleBarCaptionAt( int x, int y ) {
+		// necessary because BasicSplitPaneDivider adds some mouse listeners for dragging divider
+		return null; // check children
+	}
+
 	//---- class FlatSplitPaneDivider -----------------------------------------
 
 	protected class FlatSplitPaneDivider
 		extends BasicSplitPaneDivider
 	{
 		@Styleable protected String style = UIManager.getString( "SplitPaneDivider.style" );
+		/** @since 3.3 */ @Styleable protected Color hoverColor = UIManager.getColor( "SplitPaneDivider.hoverColor" );
+		/** @since 3.3 */ @Styleable protected Color pressedColor = UIManager.getColor( "SplitPaneDivider.pressedColor" );
 		@Styleable protected Color gripColor = UIManager.getColor( "SplitPaneDivider.gripColor" );
 		@Styleable protected int gripDotCount = FlatUIUtils.getUIInt( "SplitPaneDivider.gripDotCount", 3 );
 		@Styleable protected int gripDotSize = FlatUIUtils.getUIInt( "SplitPaneDivider.gripDotSize", 3 );
@@ -257,20 +301,40 @@ public class FlatSplitPaneUI
 					// necessary to show/hide one-touch buttons on expand/collapse
 					doLayout();
 					break;
+
+				case FlatClientProperties.SPLIT_PANE_EXPANDABLE_SIDE:
+					revalidate();
+					break;
 			}
 		}
 
 		@Override
 		public void paint( Graphics g ) {
+			// paint hover or pressed background
+			Color hoverOrPressedColor = (isContinuousLayout() && dragger != null)
+				? pressedColor
+				: (isMouseOver() && dragger == null
+					? hoverColor
+					: null);
+			if( hoverOrPressedColor != null ) {
+				g.setColor( FlatUIUtils.deriveColor( hoverOrPressedColor, splitPane.getBackground() ) );
+				g.fillRect( 0, 0, getWidth(), getHeight() );
+			}
+
 			super.paint( g );
 
+			paintStyle( g, 0, 0, getWidth(), getHeight() );
+		}
+
+		/** @since 3.3 */
+		protected void paintStyle( Graphics g, int x, int y, int width, int height ) {
 			if( "plain".equals( style ) )
 				return;
 
 			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
 
 			g.setColor( gripColor );
-			paintGrip( g, 0, 0, getWidth(), getHeight() );
+			paintGrip( g, x, y, width, height );
 
 			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
 		}
@@ -297,6 +361,29 @@ public class FlatSplitPaneUI
 				: location == (splitPane.getWidth() - getWidth() - insets.right);
 		}
 
+		@Override
+		protected void setMouseOver( boolean mouseOver ) {
+			super.setMouseOver( mouseOver );
+			repaintIfNecessary();
+		}
+
+		@Override
+		protected void prepareForDragging() {
+			super.prepareForDragging();
+			repaintIfNecessary();
+		}
+
+		@Override
+		protected void finishDraggingTo( int location ) {
+			super.finishDraggingTo( location );
+			repaintIfNecessary();
+		}
+
+		private void repaintIfNecessary() {
+			if( hoverColor != null || pressedColor != null )
+				repaint();
+		}
+
 		//---- class FlatOneTouchButton ---------------------------------------
 
 		protected class FlatOneTouchButton

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatStylingSupport.java

@@ -40,8 +40,8 @@ import javax.swing.UIManager;
 import javax.swing.border.Border;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.StringUtils;
-import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Support for styling components in CSS syntax.
@@ -51,6 +51,9 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatStylingSupport
 {
+
+	//---- annotations --------------------------------------------------------
+
 	/**
 	 * Indicates that a field is intended to be used by FlatLaf styling support.
 	 * <p>
@@ -98,17 +101,56 @@ public class FlatStylingSupport
 	}
 
 
-	/** @since 2 */
-	public interface StyleableUI {
-		Map<String, Class<?>> getStyleableInfos( JComponent c );
-		/** @since 2.5 */ Object getStyleableValue( JComponent c, String key );
-	}
+	//---- interfaces ---------------------------------------------------------
 
 	/** @since 2 */
-	public interface StyleableBorder {
-		Object applyStyleProperty( String key, Object value );
-		Map<String, Class<?>> getStyleableInfos();
-		/** @since 2.5 */ Object getStyleableValue( String key );
+	public interface StyleableUI {
+		Map<String, Class<?>> getStyleableInfos( JComponent c ) throws IllegalArgumentException;
+		/** @since 2.5 */ Object getStyleableValue( JComponent c, String key ) throws IllegalArgumentException;
+	}
+
+	/**
+	 * An object that implements this interface is intended to support FlatLaf styling.
+	 *
+	 * @since 3.7
+	 */
+	public interface StyleableObject {
+		/**
+		 * Applies the given value to this object.
+		 * <p>
+		 * The default implementation invokes {@link FlatStylingSupport#applyToAnnotatedObject(Object, String, Object)}.
+		 *
+		 * @param key the name of the property
+		 * @param value the new value
+		 * @return the old value of the property
+		 */
+		default Object applyStyleProperty( String key, Object value )
+			throws UnknownStyleException, IllegalArgumentException
+		{
+			return applyToAnnotatedObject( this, key, value );
+		}
+
+		/**
+		 * Returns a map of all styleable properties.
+		 * The key is the name of the property and the value the type of the property.
+		 * <p>
+		 * The default implementation invokes {@link FlatStylingSupport#getAnnotatedStyleableInfos(Object)}.
+		 */
+		default Map<String, Class<?>> getStyleableInfos() throws IllegalArgumentException {
+			return getAnnotatedStyleableInfos( this );
+		}
+
+		/**
+		 * Returns the current value for the given property key.
+		 * <p>
+		 * The default implementation invokes {@link FlatStylingSupport#getAnnotatedStyleableValue(Object, String)}.
+		 *
+		 * @param key the name of the property
+		 * @return the current value of the property
+		 */
+		default Object getStyleableValue( String key ) throws IllegalArgumentException {
+			return getAnnotatedStyleableValue( this, key );
+		}
 	}
 
 	/** @since 2.5 */
@@ -117,6 +159,8 @@ public class FlatStylingSupport
 	}
 
 
+	//---- methods ------------------------------------------------------------
+
 	/**
 	 * Returns the style specified in client property {@link FlatClientProperties#STYLE}.
 	 */
@@ -135,7 +179,9 @@ public class FlatStylingSupport
 		return getStyle( c ) != null || getStyleClass( c ) != null;
 	}
 
-	public static Object getResolvedStyle( JComponent c, String type ) {
+	public static Object getResolvedStyle( JComponent c, String type )
+		throws IllegalArgumentException
+	{
 		Object style = getStyle( c );
 		Object styleClass = getStyleClass( c );
 		Object styleForClasses = getStyleForClasses( styleClass, type );
@@ -175,7 +221,9 @@ public class FlatStylingSupport
 	 * @param type the type of the component
 	 * @return the styles
 	 */
-	public static Object getStyleForClasses( Object styleClass, String type ) {
+	public static Object getStyleForClasses( Object styleClass, String type )
+		throws IllegalArgumentException
+	{
 		if( styleClass == null )
 			return null;
 
@@ -198,7 +246,9 @@ public class FlatStylingSupport
 			return null;
 	}
 
-	private static Object getStyleForClass( String styleClass, String type ) {
+	private static Object getStyleForClass( String styleClass, String type )
+		throws IllegalArgumentException
+	{
 		return joinStyles(
 			UIManager.get( "[style]." + styleClass ),
 			UIManager.get( "[style]" + type + '.' + styleClass ) );
@@ -218,7 +268,9 @@ public class FlatStylingSupport
 	 * @return new joined style
 	 */
 	@SuppressWarnings( "unchecked" )
-	public static Object joinStyles( Object style1, Object style2 ) {
+	public static Object joinStyles( Object style1, Object style2 )
+		throws IllegalArgumentException
+	{
 		if( style1 == null )
 			return style2;
 		if( style2 == null )
@@ -278,6 +330,7 @@ public class FlatStylingSupport
 	 * @throws IllegalArgumentException on syntax errors
 	 * @throws ClassCastException if value type does not fit to expected type
 	 */
+	@SuppressWarnings( "ReturnValueIgnored" ) // Error Prone
 	public static Map<String, Object> parseAndApply( Map<String, Object> oldStyleValues,
 		Object style, BiFunction<String, Object, Object> applyProperty )
 			throws UnknownStyleException, IllegalArgumentException
@@ -315,22 +368,24 @@ public class FlatStylingSupport
 			return null;
 
 		Map<String, Object> oldValues = new HashMap<>();
+		outer:
 		for( Map.Entry<String, Object> e : style.entrySet() ) {
 			String key = e.getKey();
 			Object newValue = e.getValue();
 
 			// handle key prefix
-			if( key.startsWith( "[" ) ) {
-				if( (SystemInfo.isWindows && key.startsWith( "[win]" )) ||
-					(SystemInfo.isMacOS && key.startsWith( "[mac]" )) ||
-					(SystemInfo.isLinux && key.startsWith( "[linux]" )) ||
-					(key.startsWith( "[light]" ) && !FlatLaf.isLafDark()) ||
-					(key.startsWith( "[dark]" ) && FlatLaf.isLafDark()) )
-				{
-					// prefix is known and enabled --> remove prefix
-					key = key.substring( key.indexOf( ']' ) + 1 );
-				} else
-					continue;
+			while( key.startsWith( "[" ) ) {
+				int closeIndex = key.indexOf( ']' );
+				if( closeIndex < 0 )
+					continue outer;
+
+				String prefix = key.substring( 0, closeIndex + 1 );
+				String lightOrDarkPrefix = FlatLaf.getUIKeyLightOrDarkPrefix( FlatLaf.isLafDark() );
+				if( !lightOrDarkPrefix.equals( prefix ) && !FlatLaf.getUIKeyPlatformPrefixes().contains( prefix ) )
+					continue outer;
+
+				// prefix is known and enabled --> remove prefix
+				key = key.substring( closeIndex + 1 );
 			}
 
 			Object oldValue = applyProperty.apply( key, newValue );
@@ -379,7 +434,9 @@ public class FlatStylingSupport
 		return map;
 	}
 
-	private static Object parseValue( String key, String value ) {
+	private static Object parseValue( String key, String value )
+		throws IllegalArgumentException
+	{
 		// simple reference
 		if( value.startsWith( "$" ) )
 			return UIManager.get( value.substring( 1 ) );
@@ -474,7 +531,9 @@ public class FlatStylingSupport
 		}
 	}
 
-	private static Object applyToField( Field f, Object obj, Object value, boolean useMethodHandles ) {
+	private static Object applyToField( Field f, Object obj, Object value, boolean useMethodHandles )
+		throws IllegalArgumentException
+	{
 		checkValidField( f );
 
 		if( useMethodHandles && obj instanceof StyleableLookupProvider ) {
@@ -504,7 +563,9 @@ public class FlatStylingSupport
 		}
 	}
 
-	private static Object getFieldValue( Field f, Object obj, boolean useMethodHandles ) {
+	private static Object getFieldValue( Field f, Object obj, boolean useMethodHandles )
+		throws IllegalArgumentException
+	{
 		checkValidField( f );
 
 		if( useMethodHandles && obj instanceof StyleableLookupProvider ) {
@@ -529,7 +590,9 @@ public class FlatStylingSupport
 		return new IllegalArgumentException( "failed to access field '" + f.getDeclaringClass().getName() + "." + f.getName() + "'", ex );
 	}
 
-	private static void checkValidField( Field f ) {
+	private static void checkValidField( Field f )
+		throws IllegalArgumentException
+	{
 		if( !isValidField( f ) )
 			throw new IllegalArgumentException( "field '" + f.getDeclaringClass().getName() + "." + f.getName() + "' is final or static" );
 	}
@@ -539,7 +602,9 @@ public class FlatStylingSupport
 		return (modifiers & (Modifier.FINAL|Modifier.STATIC)) == 0 && !f.isSynthetic();
 	}
 
-	private static Field getStyleableField( StyleableField styleableField ) {
+	private static Field getStyleableField( StyleableField styleableField )
+		throws IllegalArgumentException
+	{
 		String fieldName = styleableField.fieldName();
 		if( fieldName.isEmpty() )
 			fieldName = styleableField.key();
@@ -647,13 +712,14 @@ public class FlatStylingSupport
 
 	static Object applyToAnnotatedObjectOrBorder( Object obj, String key, Object value,
 		JComponent c, AtomicBoolean borderShared )
+			throws IllegalArgumentException
 	{
 		try {
 			return applyToAnnotatedObject( obj, key, value );
 		} catch( UnknownStyleException ex ) {
 			// apply to border
 			Border border = c.getBorder();
-			if( border instanceof StyleableBorder ) {
+			if( border instanceof StyleableObject ) {
 				if( borderShared.get() ) {
 					border = cloneBorder( border );
 					c.setBorder( border );
@@ -661,7 +727,7 @@ public class FlatStylingSupport
 				}
 
 				try {
-					return ((StyleableBorder)border).applyStyleProperty( key, value );
+					return ((StyleableObject)border).applyStyleProperty( key, value );
 				} catch( UnknownStyleException ex2 ) {
 					// ignore
 				}
@@ -689,13 +755,15 @@ public class FlatStylingSupport
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle.run();
 					c.revalidate();
-					c.repaint();
+					HiDPIUtils.repaint( c );
 					break;
 			}
 		};
 	}
 
-	static Border cloneBorder( Border border ) {
+	static Border cloneBorder( Border border )
+		throws IllegalArgumentException
+	{
 		Class<? extends Border> borderClass = border.getClass();
 		try {
 			return borderClass.getDeclaredConstructor().newInstance();
@@ -704,7 +772,9 @@ public class FlatStylingSupport
 		}
 	}
 
-	static Icon cloneIcon( Icon icon ) {
+	static Icon cloneIcon( Icon icon )
+		throws IllegalArgumentException
+	{
 		Class<? extends Icon> iconClass = icon.getClass();
 		try {
 			return iconClass.getDeclaredConstructor().newInstance();
@@ -717,11 +787,15 @@ public class FlatStylingSupport
 	 * Returns a map of all fields annotated with {@link Styleable}.
 	 * The key is the name of the field and the value the type of the field.
 	 */
-	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj ) {
+	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj )
+		throws IllegalArgumentException
+	{
 		return getAnnotatedStyleableInfos( obj, null );
 	}
 
-	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj, Border border ) {
+	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj, Border border )
+		throws IllegalArgumentException
+	{
 		Map<String, Class<?>> infos = new StyleableInfosMap<>();
 		collectAnnotatedStyleableInfos( obj, infos );
 		collectStyleableInfos( border, infos );
@@ -732,7 +806,9 @@ public class FlatStylingSupport
 	 * Search for all fields annotated with {@link Styleable} and add them to the given map.
 	 * The key is the name of the field and the value the type of the field.
 	 */
-	public static void collectAnnotatedStyleableInfos( Object obj, Map<String, Class<?>> infos ) {
+	public static void collectAnnotatedStyleableInfos( Object obj, Map<String, Class<?>> infos )
+		throws IllegalArgumentException
+	{
 		HashSet<String> processedFields = new HashSet<>();
 		Class<?> cls = obj.getClass();
 
@@ -801,8 +877,8 @@ public class FlatStylingSupport
 	}
 
 	public static void collectStyleableInfos( Border border, Map<String, Class<?>> infos ) {
-		if( border instanceof StyleableBorder )
-			infos.putAll( ((StyleableBorder)border).getStyleableInfos() );
+		if( border instanceof StyleableObject )
+			infos.putAll( ((StyleableObject)border).getStyleableInfos() );
 	}
 
 	public static void putAllPrefixKey( Map<String, Class<?>> infos, String keyPrefix, Map<String, Class<?>> infos2 ) {
@@ -810,7 +886,9 @@ public class FlatStylingSupport
 			infos.put( keyPrefix.concat( e.getKey() ), e.getValue() );
 	}
 
-	public static Object getAnnotatedStyleableValue( Object obj, String key ) {
+	public static Object getAnnotatedStyleableValue( Object obj, String key )
+		throws IllegalArgumentException
+	{
 		String fieldName = keyToFieldName( key );
 		Class<?> cls = obj.getClass();
 
@@ -848,8 +926,8 @@ public class FlatStylingSupport
 	}
 
 	public static Object getAnnotatedStyleableValue( Object obj, Border border, String key ) {
-		if( border instanceof StyleableBorder ) {
-			Object value = ((StyleableBorder)border).getStyleableValue( key );
+		if( border instanceof StyleableObject ) {
+			Object value = ((StyleableObject)border).getStyleableValue( key );
 			if( value != null )
 				return value;
 		}
@@ -877,7 +955,9 @@ public class FlatStylingSupport
 		extends LinkedHashMap<K,V>
 	{
 		@Override
-		public V put( K key, V value ) {
+		public V put( K key, V value )
+			throws IllegalArgumentException
+		{
 			V oldValue = super.put( key, value );
 			if( oldValue != null )
 				throw new IllegalArgumentException( "duplicate key '" + key + "'" );

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTableCellBorder.java

@@ -65,8 +65,28 @@ public class FlatTableCellBorder
 		return super.getLineColor();
 	}
 
+	@Override
+	public int getArc() {
+		if( c != null ) {
+			Integer selectionArc = getStyleFromTableUI( c, ui -> ui.selectionArc );
+			if( selectionArc != null )
+				return selectionArc;
+		}
+		return super.getArc();
+	}
+
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+		if( c != null ) {
+			Insets selectionInsets = getStyleFromTableUI( c, ui -> ui.selectionInsets );
+			if( selectionInsets != null ) {
+				x += selectionInsets.left;
+				y += selectionInsets.top;
+				width -= selectionInsets.left + selectionInsets.right;
+				height -= selectionInsets.top + selectionInsets.bottom;
+			}
+		}
+
 		this.c = c;
 		super.paintBorder( c, g, x, y, width, height );
 		this.c = null;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTableHeaderUI.java

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
 import java.awt.Component;
+import java.awt.Container;
 import java.awt.Cursor;
 import java.awt.Dimension;
 import java.awt.Graphics;
@@ -28,16 +29,15 @@ import java.awt.event.MouseEvent;
 import java.awt.geom.Rectangle2D;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
+import javax.swing.CellRendererPane;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JLabel;
 import javax.swing.JTable;
 import javax.swing.SwingConstants;
 import javax.swing.UIManager;
-import javax.swing.border.Border;
 import javax.swing.event.MouseInputListener;
 import javax.swing.plaf.ComponentUI;
-import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicTableHeaderUI;
 import javax.swing.table.JTableHeader;
 import javax.swing.table.TableCellRenderer;
@@ -45,6 +45,7 @@ import javax.swing.table.TableColumn;
 import javax.swing.table.TableColumnModel;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -114,6 +115,11 @@ public class FlatTableHeaderUI
 	public void installUI( JComponent c ) {
 		super.installUI( c );
 
+		// replace cell renderer pane
+		header.remove( rendererPane );
+		rendererPane = new FlatTableHeaderCellRendererPane();
+		header.add( rendererPane );
+
 		installStyle();
 	}
 
@@ -229,8 +235,8 @@ public class FlatTableHeaderUI
 
 	@Override
 	protected void rolloverColumnUpdated( int oldColumn, int newColumn ) {
-		header.repaint( header.getHeaderRect( oldColumn ) );
-		header.repaint( header.getHeaderRect( newColumn ) );
+		HiDPIUtils.repaint( header, header.getHeaderRect( oldColumn ) );
+		HiDPIUtils.repaint( header, header.getHeaderRect( newColumn ) );
 	}
 
 	@Override
@@ -265,16 +271,8 @@ public class FlatTableHeaderUI
 			}
 		}
 
-		// temporary use own default renderer
-		FlatTableCellHeaderRenderer tempRenderer = new FlatTableCellHeaderRenderer( header.getDefaultRenderer() );
-		header.setDefaultRenderer( tempRenderer );
-
 		// paint header
 		super.paint( g, c );
-
-		// restore default renderer
-		tempRenderer.reset();
-		header.setDefaultRenderer( tempRenderer.delegate );
 	}
 
 	private boolean isSystemDefaultRenderer( Object headerRenderer ) {
@@ -332,119 +330,129 @@ public class FlatTableHeaderUI
 		return false;
 	}
 
-	//---- class FlatTableCellHeaderRenderer ----------------------------------
+	//---- class FlatTableHeaderCellRendererPane ------------------------------
 
 	/**
-	 * A delegating header renderer that is only used to paint hover and pressed
-	 * background/foreground and to paint sort arrows at top, bottom or left position.
+	 * Cell renderer pane that is used to paint hover and pressed background/foreground
+	 * and to paint sort arrows at top, bottom or left position.
 	 */
-	private class FlatTableCellHeaderRenderer
-		implements TableCellRenderer, Border, UIResource
+	private class FlatTableHeaderCellRendererPane
+		extends CellRendererPane
 	{
-		private final TableCellRenderer delegate;
+		private final Icon ascendingSortIcon;
+		private final Icon descendingSortIcon;
 
-		private JLabel l;
-		private Color oldBackground;
-		private Color oldForeground;
-		private Boolean oldOpaque;
-		private int oldHorizontalTextPosition = -1;
-		private Border origBorder;
-		private Icon sortIcon;
-
-		FlatTableCellHeaderRenderer( TableCellRenderer delegate ) {
-			this.delegate = delegate;
+		public FlatTableHeaderCellRendererPane() {
+			ascendingSortIcon = UIManager.getIcon( "Table.ascendingSortIcon" );
+			descendingSortIcon = UIManager.getIcon( "Table.descendingSortIcon" );
 		}
 
 		@Override
-		public Component getTableCellRendererComponent( JTable table, Object value, boolean isSelected,
-			boolean hasFocus, int row, int column )
-		{
-			Component c = delegate.getTableCellRendererComponent( table, value, isSelected, hasFocus, row, column );
-			if( !(c instanceof JLabel) )
-				return c;
+		public void paintComponent( Graphics g, Component c, Container p, int x, int y, int w, int h, boolean shouldValidate ) {
+			if( !(c instanceof JLabel) ) {
+				super.paintComponent( g, c, p, x, y, w, h, shouldValidate );
+				return;
+			}
 
-			l = (JLabel) c;
+			JLabel l = (JLabel) c;
+			Color oldBackground = null;
+			Color oldForeground = null;
+			boolean oldOpaque = false;
+			Icon oldIcon = null;
+			int oldHorizontalTextPosition = -1;
 
 			// hover and pressed background/foreground
 			TableColumn draggedColumn = header.getDraggedColumn();
 			Color background = null;
 			Color foreground = null;
-			if( draggedColumn != null && header.getTable().convertColumnIndexToView( draggedColumn.getModelIndex() ) == column ) {
+			if( draggedColumn != null &&
+				header.getTable().convertColumnIndexToView( draggedColumn.getModelIndex() )
+					== getColumn( x - header.getDraggedDistance(), w ) )
+			{
 				background = pressedBackground;
 				foreground = pressedForeground;
-			} else if( getRolloverColumn() == column ) {
+			} else if( getRolloverColumn() >= 0 && getRolloverColumn() == getColumn( x, w ) ) {
 				background = hoverBackground;
 				foreground = hoverForeground;
 			}
 			if( background != null ) {
-				if( oldBackground == null )
-					oldBackground = l.getBackground();
-				if( oldOpaque == null )
-					oldOpaque = l.isOpaque();
+				oldBackground = l.getBackground();
+				oldOpaque = l.isOpaque();
 				l.setBackground( FlatUIUtils.deriveColor( background, header.getBackground() ) );
 				l.setOpaque( true );
 			}
 			if( foreground != null ) {
-				if( oldForeground == null )
-					oldForeground = l.getForeground();
+				oldForeground = l.getForeground();
 				l.setForeground( FlatUIUtils.deriveColor( foreground, header.getForeground() ) );
 			}
 
-			// sort icon
-			if( sortIconPosition == SwingConstants.LEFT ) {
-				// left
-				if( oldHorizontalTextPosition < 0 )
+			// sort icon position
+			Icon icon = l.getIcon();
+			boolean isSortIcon = (icon != null && (icon == ascendingSortIcon || icon == descendingSortIcon));
+			if( isSortIcon ) {
+				if( sortIconPosition == SwingConstants.LEFT ) {
+					// left
 					oldHorizontalTextPosition = l.getHorizontalTextPosition();
-				l.setHorizontalTextPosition( SwingConstants.RIGHT );
-			} else if( sortIconPosition == SwingConstants.TOP || sortIconPosition == SwingConstants.BOTTOM ) {
-				// top or bottom
-				sortIcon = l.getIcon();
-				origBorder = l.getBorder();
-				l.setIcon( null );
-				l.setBorder( this );
+					l.setHorizontalTextPosition( SwingConstants.RIGHT );
+				} else if( sortIconPosition == SwingConstants.TOP || sortIconPosition == SwingConstants.BOTTOM ) {
+					// top or bottom
+					oldIcon = icon;
+					l.setIcon( null );
+				}
 			}
 
-			return l;
-		}
+			// paint renderer component
+			super.paintComponent( g, c, p, x, y, w, h, shouldValidate );
 
-		void reset() {
-			if( l == null )
-				return;
+			// paint top or bottom sort icon
+			if( isSortIcon && (sortIconPosition == SwingConstants.TOP || sortIconPosition == SwingConstants.BOTTOM) ) {
+				int xi = x + ((w - icon.getIconWidth()) / 2);
+				int yi = (sortIconPosition == SwingConstants.TOP)
+					? y + UIScale.scale( 1 )
+					: y + height - icon.getIconHeight()
+						- 1 // for gap
+						- (int) (1 * UIScale.getUserScaleFactor()); // for bottom border
+				icon.paintIcon( c, g, xi, yi );
+			}
 
-			if( oldBackground != null )
+			// restore modified renderer component properties
+			if( background != null ) {
 				l.setBackground( oldBackground );
-			if( oldForeground != null )
-				l.setForeground( oldForeground );
-			if( oldOpaque != null )
 				l.setOpaque( oldOpaque );
+			}
+			if( foreground != null )
+				l.setForeground( oldForeground );
+			if( oldIcon != null )
+				l.setIcon( oldIcon );
 			if( oldHorizontalTextPosition >= 0 )
 				l.setHorizontalTextPosition( oldHorizontalTextPosition );
 		}
 
-		@Override
-		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
-			if( origBorder != null )
-				origBorder.paintBorder( c, g, x, y, width, height );
+		/**
+		 * Get column index for given coordinates.
+		 */
+		private int getColumn( int x, int width ) {
+			TableColumnModel columnModel = header.getColumnModel();
+			int columnCount = columnModel.getColumnCount();
+			boolean ltr = header.getComponentOrientation().isLeftToRight();
+			int cx = ltr ? 0 : getWidthInRightToLef();
 
-			if( sortIcon != null ) {
-				int xi = x + ((width - sortIcon.getIconWidth()) / 2);
-				int yi = (sortIconPosition == SwingConstants.TOP)
-					? y + UIScale.scale( 1 )
-					: y + height - sortIcon.getIconHeight()
-						- 1 // for gap
-						- (int) (1 * UIScale.getUserScaleFactor()); // for bottom border
-				sortIcon.paintIcon( c, g, xi, yi );
+			for( int i = 0; i < columnCount; i++ ) {
+				int cw = columnModel.getColumn( i ).getWidth();
+				if( x == cx - (ltr ? 0 : cw) && width == cw )
+					return i;
+
+				cx += ltr ? cw : -cw;
 			}
+			return -1;
 		}
 
-		@Override
-		public Insets getBorderInsets( Component c ) {
-			return (origBorder != null) ? origBorder.getBorderInsets( c ) : new Insets( 0, 0, 0, 0 );
-		}
-
-		@Override
-		public boolean isBorderOpaque() {
-			return (origBorder != null) ? origBorder.isBorderOpaque() : false;
+		// similar to JTableHeader.getWidthInRightToLeft()
+		private int getWidthInRightToLef() {
+			JTable table = header.getTable();
+			return (table != null && table.getAutoResizeMode() != JTable.AUTO_RESIZE_OFF)
+				? table.getWidth()
+				: header.getWidth();
 		}
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTableUI.java

@@ -17,30 +17,57 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.EventQueue;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Shape;
+import java.awt.event.ActionEvent;
+import java.awt.event.ComponentAdapter;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import java.awt.geom.Rectangle2D;
+import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
+import javax.swing.Action;
+import javax.swing.ActionMap;
+import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JScrollPane;
+import javax.swing.JTable;
+import javax.swing.JTextField;
 import javax.swing.JViewport;
+import javax.swing.ListSelectionModel;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ListSelectionEvent;
+import javax.swing.event.ListSelectionListener;
+import javax.swing.event.TableColumnModelEvent;
+import javax.swing.event.TableColumnModelListener;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicTableUI;
+import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.JTableHeader;
+import javax.swing.table.TableCellRenderer;
+import javax.swing.table.TableColumnModel;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.icons.FlatCheckBoxIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.Graphics2DProxy;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
@@ -80,7 +107,10 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Table.intercellSpacing					Dimension
  * @uiDefault Table.selectionInactiveBackground			Color
  * @uiDefault Table.selectionInactiveForeground			Color
+ * @uiDefault Table.selectionInsets						Insets
+ * @uiDefault Table.selectionArc						int
  * @uiDefault Table.paintOutsideAlternateRows			boolean
+ * @uiDefault Table.editorSelectAllOnStartEditing		boolean
  *
  * <!-- FlatTableCellBorder -->
  *
@@ -107,6 +137,8 @@ public class FlatTableUI
 	@Styleable protected Color selectionForeground;
 	@Styleable protected Color selectionInactiveBackground;
 	@Styleable protected Color selectionInactiveForeground;
+	/** @since 3.5 */ @Styleable protected Insets selectionInsets;
+	/** @since 3.5 */ @Styleable protected int selectionArc;
 
 	// for FlatTableCellBorder
 	/** @since 2 */ @Styleable protected Insets cellMargins;
@@ -116,8 +148,12 @@ public class FlatTableUI
 	private boolean oldShowHorizontalLines;
 	private boolean oldShowVerticalLines;
 	private Dimension oldIntercellSpacing;
+	private TableCellRenderer oldBooleanRenderer;
 
 	private PropertyChangeListener propertyChangeListener;
+	private ComponentListener outsideAlternateRowsListener;
+	private ListSelectionListener rowSelectionListener;
+	private TableColumnModelListener columnSelectionListener;
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
@@ -144,6 +180,8 @@ public class FlatTableUI
 		selectionForeground = UIManager.getColor( "Table.selectionForeground" );
 		selectionInactiveBackground = UIManager.getColor( "Table.selectionInactiveBackground" );
 		selectionInactiveForeground = UIManager.getColor( "Table.selectionInactiveForeground" );
+		selectionInsets = UIManager.getInsets( "Table.selectionInsets" );
+		selectionArc = UIManager.getInt( "Table.selectionArc" );
 
 		toggleSelectionColors();
 
@@ -151,19 +189,35 @@ public class FlatTableUI
 		if( rowHeight > 0 )
 			LookAndFeel.installProperty( table, "rowHeight", UIScale.scale( rowHeight ) );
 
-		if( !showHorizontalLines ) {
+		FlatTablePropertyWatcher watcher = FlatTablePropertyWatcher.get( table );
+		if( watcher != null )
+			watcher.enabled = false;
+
+		if( !showHorizontalLines && (watcher == null || !watcher.showHorizontalLinesChanged) ) {
 			oldShowHorizontalLines = table.getShowHorizontalLines();
 			table.setShowHorizontalLines( false );
 		}
-		if( !showVerticalLines ) {
+		if( !showVerticalLines && (watcher == null || !watcher.showVerticalLinesChanged) ) {
 			oldShowVerticalLines = table.getShowVerticalLines();
 			table.setShowVerticalLines( false );
 		}
 
-		if( intercellSpacing != null ) {
+		if( intercellSpacing != null && (watcher == null || !watcher.intercellSpacingChanged) ) {
 			oldIntercellSpacing = table.getIntercellSpacing();
 			table.setIntercellSpacing( intercellSpacing );
 		}
+
+		if( watcher != null )
+			watcher.enabled = true;
+		else
+			table.addPropertyChangeListener( new FlatTablePropertyWatcher() );
+
+		// install boolean renderer
+		oldBooleanRenderer = table.getDefaultRenderer( Boolean.class );
+		if( oldBooleanRenderer instanceof UIResource )
+			table.setDefaultRenderer( Boolean.class, new FlatBooleanRenderer() );
+		else
+			oldBooleanRenderer = null;
 	}
 
 	@Override
@@ -177,15 +231,36 @@ public class FlatTableUI
 
 		oldStyleValues = null;
 
+		FlatTablePropertyWatcher watcher = FlatTablePropertyWatcher.get( table );
+		if( watcher != null )
+			watcher.enabled = false;
+
 		// restore old show horizontal/vertical lines (if not modified)
-		if( !showHorizontalLines && oldShowHorizontalLines && !table.getShowHorizontalLines() )
-			table.setShowHorizontalLines( true );
-		if( !showVerticalLines && oldShowVerticalLines && !table.getShowVerticalLines() )
-			table.setShowVerticalLines( true );
+		if( !showHorizontalLines && oldShowHorizontalLines && !table.getShowHorizontalLines() &&
+			(watcher == null || !watcher.showHorizontalLinesChanged) )
+		  table.setShowHorizontalLines( true );
+		if( !showVerticalLines && oldShowVerticalLines && !table.getShowVerticalLines() &&
+			(watcher == null || !watcher.showVerticalLinesChanged) )
+		  table.setShowVerticalLines( true );
 
 		// restore old intercell spacing (if not modified)
-		if( intercellSpacing != null && table.getIntercellSpacing().equals( intercellSpacing ) )
-			table.setIntercellSpacing( oldIntercellSpacing );
+		if( intercellSpacing != null && table.getIntercellSpacing().equals( intercellSpacing ) &&
+			(watcher == null || !watcher.intercellSpacingChanged) )
+		  table.setIntercellSpacing( oldIntercellSpacing );
+
+		if( watcher != null )
+			watcher.enabled = true;
+
+		// uninstall boolean renderer
+		if( table.getDefaultRenderer( Boolean.class ) instanceof FlatBooleanRenderer ) {
+			if( oldBooleanRenderer instanceof Component ) {
+				// because the old renderer component was not attached to any component hierarchy,
+				// its UI was not yet updated, and it is necessary to do it here
+				SwingUtilities.updateComponentTreeUI( (Component) oldBooleanRenderer );
+			}
+			table.setDefaultRenderer( Boolean.class, oldBooleanRenderer );
+		}
+		oldBooleanRenderer = null;
 	}
 
 	@Override
@@ -194,6 +269,28 @@ public class FlatTableUI
 
 		propertyChangeListener = e -> {
 			switch( e.getPropertyName() ) {
+				case "selectionModel":
+					if( rowSelectionListener != null ) {
+						Object oldModel = e.getOldValue();
+						Object newModel = e.getNewValue();
+						if( oldModel != null )
+							((ListSelectionModel)oldModel).removeListSelectionListener( rowSelectionListener );
+						if( newModel != null )
+							((ListSelectionModel)newModel).addListSelectionListener( rowSelectionListener );
+					}
+					break;
+
+				case "columnModel":
+					if( columnSelectionListener != null ) {
+						Object oldModel = e.getOldValue();
+						Object newModel = e.getNewValue();
+						if( oldModel != null )
+							((TableColumnModel)oldModel).removeColumnModelListener( columnSelectionListener );
+						if( newModel != null )
+							((TableColumnModel)newModel).addColumnModelListener( columnSelectionListener );
+					}
+					break;
+
 				case FlatClientProperties.COMPONENT_FOCUS_OWNER:
 					toggleSelectionColors();
 					break;
@@ -202,11 +299,14 @@ public class FlatTableUI
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					table.revalidate();
-					table.repaint();
+					HiDPIUtils.repaint( table );
 					break;
 			}
 		};
 		table.addPropertyChangeListener( propertyChangeListener );
+
+		if( selectionArc > 0 )
+			installRepaintRoundedSelectionListeners();
 	}
 
 	@Override
@@ -215,6 +315,19 @@ public class FlatTableUI
 
 		table.removePropertyChangeListener( propertyChangeListener );
 		propertyChangeListener = null;
+
+		if( outsideAlternateRowsListener != null ) {
+			table.removeComponentListener( outsideAlternateRowsListener );
+			outsideAlternateRowsListener = null;
+		}
+		if( rowSelectionListener != null ) {
+			table.getSelectionModel().removeListSelectionListener( rowSelectionListener );
+			rowSelectionListener = null;
+		}
+		if( columnSelectionListener != null ) {
+			table.getColumnModel().removeColumnModelListener( columnSelectionListener );
+			columnSelectionListener = null;
+		}
 	}
 
 	@Override
@@ -238,6 +351,18 @@ public class FlatTableUI
 		};
 	}
 
+	@Override
+	protected void installKeyboardActions() {
+		super.installKeyboardActions();
+
+		if( UIManager.getBoolean( "Table.editorSelectAllOnStartEditing" ) ) {
+			// get shared action map, used for all tables
+			ActionMap map = SwingUtilities.getUIActionMap( table );
+			if( map != null )
+				StartEditingAction.install( map, "startEditing" );
+		}
+	}
+
 	/** @since 2 */
 	protected void installStyle() {
 		try {
@@ -277,6 +402,11 @@ public class FlatTableUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
+		if( "rowHeight".equals( key ) && value instanceof Integer )
+			value = UIScale.scale( (Integer) value );
+		else if( "selectionArc".equals( key ) && value instanceof Integer && (Integer) value > 0 )
+			installRepaintRoundedSelectionListeners();
+
 		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, table, key, value );
 	}
 
@@ -338,6 +468,7 @@ public class FlatTableUI
 
 			double systemScaleFactor = UIScale.getSystemScaleFactor( (Graphics2D) g );
 			double lineThickness = (1. / systemScaleFactor) * (int) systemScaleFactor;
+			double lineOffset = (1. - lineThickness) + 0.05; // adding 0.05 to fix line location in some cases
 
 			// Java 8 uses drawLine() to paint grid lines
 			// Java 9+ uses fillRect() to paint grid lines (except for dragged column)
@@ -380,11 +511,11 @@ public class FlatTableUI
 					// reduce line thickness to avoid unstable painted line thickness
 					if( lineThickness != 1 ) {
 						if( horizontalLines && height == 1 && wasInvokedFromPaintGrid() ) {
-							super.fill( new Rectangle2D.Double( x, y, width, lineThickness ) );
+							super.fill( new Rectangle2D.Double( x, y + lineOffset, width, lineThickness ) );
 							return;
 						}
 						if( verticalLines && width == 1 && y == 0 && wasInvokedFromPaintGrid() ) {
-							super.fill( new Rectangle2D.Double( x, y, lineThickness, height ) );
+							super.fill( new Rectangle2D.Double( x + lineOffset, y, lineThickness, height ) );
 							return;
 						}
 					}
@@ -402,6 +533,10 @@ public class FlatTableUI
 			};
 		}
 
+		// rounded selection or selection insets
+		if( selectionArc > 0 || (selectionInsets != null && !FlatUIUtils.isInsetsEmpty( selectionInsets )) )
+			g = new RoundedSelectionGraphics( g, UIManager.getColor( "Table.alternateRowColor" ) );
+
 		super.paint( g, c );
 	}
 
@@ -447,8 +582,6 @@ public class FlatTableUI
 		boolean paintOutside = UIManager.getBoolean( "Table.paintOutsideAlternateRows" );
 		Color alternateColor;
 		if( paintOutside && (alternateColor = UIManager.getColor( "Table.alternateRowColor" )) != null ) {
-			g.setColor( alternateColor );
-
 			int rowCount = table.getRowCount();
 
 			// paint alternating empty rows below the table
@@ -457,11 +590,451 @@ public class FlatTableUI
 				int tableWidth = table.getWidth();
 				int rowHeight = table.getRowHeight();
 
+				g.setColor( alternateColor );
+
+				int x = viewport.getComponentOrientation().isLeftToRight() ? 0 : viewportWidth - tableWidth;
 				for( int y = tableHeight, row = rowCount; y < viewportHeight; y += rowHeight, row++ ) {
 					if( row % 2 != 0 )
-						g.fillRect( 0, y, tableWidth, rowHeight );
+						paintAlternateRowBackground( g, -1, -1, x, y, tableWidth, rowHeight );
+				}
+
+				// add listener on demand
+				if( outsideAlternateRowsListener == null && table.getAutoResizeMode() == JTable.AUTO_RESIZE_OFF ) {
+					outsideAlternateRowsListener = new FlatOutsideAlternateRowsListener();
+					table.addComponentListener( outsideAlternateRowsListener );
 				}
 			}
 		}
 	}
+
+	/**
+	 * Paints (rounded) alternate row background.
+	 * Supports {@link #selectionArc} and {@link #selectionInsets}.
+	 * <p>
+	 * <b>Note:</b> This method is only invoked if either selection arc
+	 *              is greater than zero or if selection insets are not empty.
+	 *
+	 * @since 3.5
+	 */
+	protected void paintAlternateRowBackground( Graphics g, int row, int column, int x, int y, int width, int height ) {
+		Insets insets = (selectionInsets != null) ? (Insets) selectionInsets.clone() : null;
+		float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
+		arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
+
+		if( column >= 0 ) {
+			// selection insets
+
+			// selection arc
+			if( column > 0 ) {
+				if( insets != null )
+					insets.left = 0;
+
+				if( table.getComponentOrientation().isLeftToRight() )
+					arcTopLeft = arcBottomLeft = 0;
+				else
+					arcTopRight = arcBottomRight = 0;
+			}
+			if( column < table.getColumnCount() - 1 ) {
+				if( insets != null )
+					insets.right = 0;
+
+				if( table.getComponentOrientation().isLeftToRight() )
+					arcTopRight = arcBottomRight = 0;
+				else
+					arcTopLeft = arcBottomLeft = 0;
+			}
+		}
+
+		FlatUIUtils.paintSelection( (Graphics2D) g, x, y, width, height,
+			UIScale.scale( insets ), arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight, 0 );
+	}
+
+	/**
+	 * Paints (rounded) cell selection.
+	 * Supports {@link #selectionArc} and {@link #selectionInsets}.
+	 * <p>
+	 * <b>Note:</b> This method is only invoked if either selection arc
+	 *              is greater than zero or if selection insets are not empty.
+	 *
+	 * @since 3.5
+	 */
+	protected void paintCellSelection( Graphics g, int row, int column, int x, int y, int width, int height ) {
+		boolean rowSelAllowed = table.getRowSelectionAllowed();
+		boolean colSelAllowed = table.getColumnSelectionAllowed();
+		boolean rowSelOnly = rowSelAllowed && !colSelAllowed;
+		boolean colSelOnly = colSelAllowed && !rowSelAllowed;
+		boolean cellOnlySel = rowSelAllowed && colSelAllowed;
+
+		// get selection state of surrounding cells
+		boolean leftSelected    = (column > 0 && (rowSelOnly || table.isCellSelected( row, column - 1 )));
+		boolean topSelected     = (row    > 0 && (colSelOnly || table.isCellSelected( row - 1, column )));
+		boolean rightSelected   = (column < table.getColumnCount() - 1 && (rowSelOnly || table.isCellSelected( row, column + 1 )));
+		boolean bottomSelected  = (row    < table.getRowCount() - 1    && (colSelOnly || table.isCellSelected( row + 1, column )));
+		if( !table.getComponentOrientation().isLeftToRight() ) {
+			boolean temp = leftSelected;
+			leftSelected = rightSelected;
+			rightSelected = temp;
+		}
+
+		// selection insets
+		// (insets are applied to whole row if row-only selection is used,
+		//  or to whole column if column-only selection is used,
+		//  or to cell if cell selection is used)
+		Insets insets = (selectionInsets != null) ? (Insets) selectionInsets.clone() : null;
+		if( insets != null ) {
+			if( rowSelOnly && leftSelected )
+				insets.left = 0;
+			if( rowSelOnly && rightSelected )
+				insets.right = 0;
+			if( colSelOnly && topSelected )
+				insets.top = 0;
+			if( colSelOnly && bottomSelected )
+				insets.bottom = 0;
+		}
+
+		// selection arc
+		float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
+		arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
+		if( selectionArc > 0 ) {
+			// note that intercellSpacing is not considered as a gap because
+			// grid lines are usually painted to intercell space
+			boolean hasRowGap = (rowSelOnly || cellOnlySel) && insets != null && (insets.top != 0 || insets.bottom != 0);
+			boolean hasColGap = (colSelOnly || cellOnlySel) && insets != null && (insets.left != 0 || insets.right != 0);
+
+			if( leftSelected && !hasColGap )
+				arcTopLeft = arcBottomLeft = 0;
+			if( rightSelected && !hasColGap )
+				arcTopRight = arcBottomRight = 0;
+			if( topSelected && !hasRowGap )
+				arcTopLeft = arcTopRight = 0;
+			if( bottomSelected && !hasRowGap )
+				arcBottomLeft = arcBottomRight = 0;
+		}
+
+		FlatUIUtils.paintSelection( (Graphics2D) g, x, y, width, height,
+			UIScale.scale( insets ), arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight, 0 );
+	}
+
+	/**
+	 * Paints a cell selection at the given coordinates.
+	 * The selection color must be set on the graphics context.
+	 * <p>
+	 * This method is intended for use in custom cell renderers to support
+	 * {@link #selectionArc} and {@link #selectionInsets}.
+	 *
+	 * @since 3.5
+	 */
+	public static void paintCellSelection( JTable table, Graphics g, int row, int column, int x, int y, int width, int height ) {
+		if( !(table.getUI() instanceof FlatTableUI) )
+			return;
+
+		FlatTableUI ui = (FlatTableUI) table.getUI();
+		ui.paintCellSelection( g, row, column, x, y, width, height );
+	}
+
+	private void installRepaintRoundedSelectionListeners() {
+		if( rowSelectionListener == null ) {
+			rowSelectionListener = this::repaintRoundedRowSelection;
+			table.getSelectionModel().addListSelectionListener( rowSelectionListener );
+		}
+
+		if( columnSelectionListener == null ) {
+			columnSelectionListener = new TableColumnModelListener() {
+				@Override
+				public void columnSelectionChanged( ListSelectionEvent e ) {
+					repaintRoundedColumnSelection( e );
+				}
+				@Override public void columnRemoved( TableColumnModelEvent e ) {}
+				@Override public void columnMoved( TableColumnModelEvent e ) {}
+				@Override public void columnMarginChanged( ChangeEvent e ) {}
+				@Override public void columnAdded( TableColumnModelEvent e ) {}
+			};
+			table.getColumnModel().addColumnModelListener( columnSelectionListener );
+		}
+	}
+
+	private void repaintRoundedRowSelection( ListSelectionEvent e ) {
+		if( selectionArc <= 0 || !table.getRowSelectionAllowed() )
+			return;
+
+		int rowCount = table.getRowCount();
+		int columnCount = table.getColumnCount();
+		if( rowCount <= 0 || columnCount <= 0 )
+			return;
+
+		// repaint including rows before and after changed selection
+		int firstRow = Math.max( 0, Math.min( e.getFirstIndex() - 1, rowCount - 1 ) );
+		int lastRow = Math.max( 0, Math.min( e.getLastIndex() + 1, rowCount - 1 ) );
+		Rectangle firstRect = table.getCellRect( firstRow, 0, false );
+		Rectangle lastRect = table.getCellRect( lastRow, columnCount - 1, false );
+		table.repaint( firstRect.union( lastRect ) );
+	}
+
+	private void repaintRoundedColumnSelection( ListSelectionEvent e ) {
+		if( selectionArc <= 0 || !table.getColumnSelectionAllowed() )
+			return;
+
+		int rowCount = table.getRowCount();
+		int columnCount = table.getColumnCount();
+		if( rowCount <= 0 || columnCount <= 0 )
+			return;
+
+		// limit to selected rows for cell selection
+		int firstRow = 0;
+		int lastRow = rowCount - 1;
+		if( table.getRowSelectionAllowed() ) {
+			firstRow = table.getSelectionModel().getMinSelectionIndex();
+			lastRow = table.getSelectionModel().getMaxSelectionIndex();
+		}
+
+		// repaint including columns before and after changed selection
+		int firstColumn = Math.max( 0, Math.min( e.getFirstIndex() - 1, columnCount - 1 ) );
+		int lastColumn = Math.max( 0, Math.min( e.getLastIndex() + 1, columnCount - 1 ) );
+		Rectangle firstRect = table.getCellRect( firstRow, firstColumn, false );
+		Rectangle lastRect = table.getCellRect( lastRow, lastColumn, false );
+		table.repaint( firstRect.union( lastRect ) );
+	}
+
+	//---- class RoundedSelectionGraphics -------------------------------------
+
+	/**
+	 * Because selection painting is done in the cell renderer, it would be
+	 * necessary to require a FlatLaf specific renderer to implement rounded selection.
+	 * Using a LaF specific renderer was avoided because often a custom renderer is
+	 * already used in applications. Then either the rounded selection is not used,
+	 * or the application has to be changed to extend a FlatLaf renderer.
+	 * <p>
+	 * To solve this, a graphics proxy is used that paints rounded selection
+	 * if row/column/cell is selected and the renderer wants to fill the background.
+	 */
+	private class RoundedSelectionGraphics
+		extends Graphics2DProxy
+	{
+		private final Color alternateRowColor;
+
+		// used to avoid endless loop in case that paintCellSelection() invokes
+		// g.fillRect() with full bounds (selectionInsets is 0,0,0,0)
+		private boolean inPaintSelection;
+
+		RoundedSelectionGraphics( Graphics delegate, Color alternateRowColor ) {
+			super( (Graphics2D) delegate );
+			this.alternateRowColor = alternateRowColor;
+		}
+
+		@Override
+		public Graphics create() {
+			return new RoundedSelectionGraphics( super.create(), alternateRowColor );
+		}
+
+		@Override
+		public Graphics create( int x, int y, int width, int height ) {
+			return new RoundedSelectionGraphics( super.create( x, y, width, height ), alternateRowColor );
+		}
+
+		@Override
+		public void fillRect( int x, int y, int width, int height ) {
+			if( fillCellSelection( x, y, width, height ) )
+				return;
+
+			super.fillRect( x, y, width, height );
+		}
+
+		@Override
+		public void fill( Shape shape ) {
+			if( shape instanceof Rectangle2D ) {
+				Rectangle2D r = (Rectangle2D) shape;
+				double x = r.getX();
+				double y = r.getY();
+				double width = r.getWidth();
+				double height = r.getHeight();
+				if( x == (int) x && y == (int) y && width == (int) width && height == (int) height ) {
+					if( fillCellSelection( (int) x, (int) y, (int) width, (int) height ) )
+						return;
+				}
+			}
+
+			super.fill( shape );
+		}
+
+		private boolean fillCellSelection( int x, int y, int width, int height ) {
+			if( inPaintSelection )
+				return false;
+
+			Color color;
+			Component rendererComponent;
+			if( x == 0 && y == 0 &&
+				((color = getColor()) == table.getSelectionBackground() ||
+				 (alternateRowColor != null && color == alternateRowColor)) &&
+				(rendererComponent = findActiveRendererComponent()) != null &&
+				width == rendererComponent.getWidth() &&
+				height == rendererComponent.getHeight() )
+			{
+				Point location = rendererComponent.getLocation();
+				int row = table.rowAtPoint( location );
+				int column = table.columnAtPoint( location );
+				if( row >= 0 && column >= 0 ) {
+					inPaintSelection = true;
+					if( color == table.getSelectionBackground() )
+						paintCellSelection( this, row, column, x, y, width, height );
+					else
+						paintAlternateRowBackground( this, row, column, x, y, width, height );
+					inPaintSelection = false;
+
+					return true;
+				}
+			}
+			return false;
+		}
+
+		/**
+		 * A CellRendererPane may contain multiple components, if multiple renderers
+		 * are used. Inactive renderer components have size {@code 0x0}.
+		 */
+		private Component findActiveRendererComponent() {
+			int count = rendererPane.getComponentCount();
+			for( int i = 0; i < count; i++ ) {
+				Component c = rendererPane.getComponent( i );
+				if( c.getWidth() > 0 && c.getHeight() > 0 )
+					return c;
+			}
+			return null;
+		}
+	}
+
+	//---- class OutsideAlternateRowsListener ---------------------------------
+
+	/**
+	 * Used if table auto-resize-mode is off to repaint outside alternate rows
+	 * when table width changed (column resized) or component orientation changed.
+	 */
+	private class FlatOutsideAlternateRowsListener
+		extends ComponentAdapter
+	{
+		@Override
+		public void componentHidden( ComponentEvent e ) {
+			Container viewport = SwingUtilities.getUnwrappedParent( table );
+			if( viewport instanceof JViewport )
+				HiDPIUtils.repaint( viewport );
+		}
+
+		@Override
+		public void componentMoved( ComponentEvent e ) {
+			repaintAreaBelowTable();
+		}
+
+		@Override
+		public void componentResized( ComponentEvent e ) {
+			repaintAreaBelowTable();
+		}
+
+		private void repaintAreaBelowTable() {
+			Container viewport = SwingUtilities.getUnwrappedParent( table );
+			if( viewport instanceof JViewport ) {
+				int viewportHeight = viewport.getHeight();
+				int tableHeight = table.getHeight();
+				if( tableHeight < viewportHeight )
+					HiDPIUtils.repaint( viewport, 0, tableHeight, viewport.getWidth(), viewportHeight - tableHeight );
+			}
+		}
+	}
+
+	//---- class FlatTablePropertyWatcher -------------------------------------
+
+	/**
+	 * Listener that watches for change of some table properties from application code.
+	 * This information is used in {@link FlatTableUI#installDefaults()} and
+	 * {@link FlatTableUI#uninstallDefaults()} to decide whether FlatLaf modifies those properties.
+	 * If they are modified in application code, FlatLaf no longer changes them.
+	 *
+	 * The listener is added once for each table, but never removed.
+	 * So switching Laf/theme reuses existing listener.
+	 */
+	private static class FlatTablePropertyWatcher
+		implements PropertyChangeListener
+	{
+		boolean enabled = true;
+		boolean showHorizontalLinesChanged;
+		boolean showVerticalLinesChanged;
+		boolean intercellSpacingChanged;
+
+		static FlatTablePropertyWatcher get( JTable table ) {
+			for( PropertyChangeListener l : table.getPropertyChangeListeners() ) {
+				if( l instanceof FlatTablePropertyWatcher )
+					return (FlatTablePropertyWatcher) l;
+			}
+			return null;
+		}
+
+		//---- interface PropertyChangeListener ----
+
+		@Override
+		public void propertyChange( PropertyChangeEvent e ) {
+			if( !enabled )
+				return;
+
+			switch( e.getPropertyName() ) {
+				case "showHorizontalLines":	showHorizontalLinesChanged = true; break;
+				case "showVerticalLines":	showVerticalLinesChanged = true; break;
+				case "rowMargin":			intercellSpacingChanged = true; break;
+			}
+		}
+	}
+
+	//---- class FlatBooleanRenderer ------------------------------------------
+
+	private static class FlatBooleanRenderer
+		extends DefaultTableCellRenderer
+		implements UIResource
+	{
+		private boolean selected;
+
+		FlatBooleanRenderer() {
+			setHorizontalAlignment( SwingConstants.CENTER );
+			Icon icon = new FlatCheckBoxIcon() {
+				@Override
+				protected boolean isSelected( Component c ) {
+					return selected;
+				}
+			};
+			setIcon( icon );
+			setDisabledIcon( icon );
+		}
+
+		@Override
+		protected void setValue( Object value ) {
+			selected = (value != null && (Boolean) value);
+		}
+	}
+
+	//---- class StartEditingAction -------------------------------------------
+
+	private static class StartEditingAction
+		extends FlatUIAction
+	{
+		static void install( ActionMap map, String key ) {
+			Action oldAction = map.get( key );
+			if( oldAction == null || oldAction instanceof StartEditingAction )
+				return; // not found or already installed
+
+			map.put( key, new StartEditingAction( oldAction ) );
+		}
+
+		private StartEditingAction( Action delegate ) {
+			super( delegate );
+		}
+
+		@Override
+		public void actionPerformed( ActionEvent e ) {
+			JTable table = (JTable) e.getSource();
+
+			Component oldEditorComp = table.getEditorComponent();
+
+			delegate.actionPerformed( e );
+
+			// select all text in editor if editing starts with F2 key
+			Component editorComp = table.getEditorComponent();
+			if( oldEditorComp == null && editorComp instanceof JTextField )
+				((JTextField)editorComp).selectAll();
+		}
+	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTextAreaUI.java

@@ -54,7 +54,6 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * <!-- FlatTextAreaUI -->
  *
  * @uiDefault Component.minimumWidth			int
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault TextArea.disabledBackground		Color	used if not enabled
  * @uiDefault TextArea.inactiveBackground		Color	used if not editable
  * @uiDefault TextArea.focusedBackground		Color	optional
@@ -66,7 +65,6 @@ public class FlatTextAreaUI
 	implements StyleableUI
 {
 	@Styleable protected int minimumWidth;
-	protected boolean isIntelliJTheme;
 	private Color background;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color inactiveBackground;
@@ -103,7 +101,6 @@ public class FlatTextAreaUI
 		super.installDefaults();
 
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		background = UIManager.getColor( "TextArea.background" );
 		disabledBackground = UIManager.getColor( "TextArea.disabledBackground" );
 		inactiveBackground = UIManager.getColor( "TextArea.inactiveBackground" );
@@ -227,6 +224,6 @@ public class FlatTextAreaUI
 
 	@Override
 	protected void paintBackground( Graphics g ) {
-		FlatEditorPaneUI.paintBackground( g, getComponent(), isIntelliJTheme, focusedBackground );
+		FlatEditorPaneUI.paintBackground( g, getComponent(), focusedBackground );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTextFieldUI.java

@@ -45,6 +45,7 @@ import javax.swing.JTextField;
 import javax.swing.JToggleButton;
 import javax.swing.JToolBar;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.event.DocumentEvent;
 import javax.swing.event.DocumentListener;
@@ -81,7 +82,6 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * <!-- FlatTextFieldUI -->
  *
  * @uiDefault Component.minimumWidth			int
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault TextField.placeholderForeground	Color
  * @uiDefault TextField.focusedBackground		Color	optional
  * @uiDefault TextField.iconTextGap				int		optional, default is 4
@@ -95,7 +95,6 @@ public class FlatTextFieldUI
 	implements StyleableUI
 {
 	@Styleable protected int minimumWidth;
-	protected boolean isIntelliJTheme;
 	private Color background;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color inactiveBackground;
@@ -165,7 +164,6 @@ public class FlatTextFieldUI
 
 		String prefix = getPropertyPrefix();
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		background = UIManager.getColor( prefix + ".background" );
 		disabledBackground = UIManager.getColor( prefix + ".disabledBackground" );
 		inactiveBackground = UIManager.getColor( prefix + ".inactiveBackground" );
@@ -176,8 +174,6 @@ public class FlatTextFieldUI
 		defaultMargin = UIManager.getInsets( prefix + ".margin" );
 
 		LookAndFeel.installProperty( getComponent(), "opaque", false );
-
-		MigLayoutVisualPadding.install( getComponent() );
 	}
 
 	@Override
@@ -195,8 +191,6 @@ public class FlatTextFieldUI
 
 		oldStyleValues = null;
 		borderShared = null;
-
-		MigLayoutVisualPadding.uninstall( getComponent() );
 	}
 
 	@Override
@@ -206,6 +200,8 @@ public class FlatTextFieldUI
 		// necessary to update focus border and background
 		focusListener = new FlatUIUtils.RepaintFocusListener( getComponent(), null );
 		getComponent().addFocusListener( focusListener );
+
+		MigLayoutVisualPadding.install( getComponent() );
 	}
 
 	@Override
@@ -219,6 +215,8 @@ public class FlatTextFieldUI
 			getComponent().getDocument().removeDocumentListener( documentListener );
 			documentListener = null;
 		}
+
+		MigLayoutVisualPadding.uninstall( getComponent() );
 	}
 
 	@Override
@@ -241,7 +239,7 @@ public class FlatTextFieldUI
 			case COMPONENT_ROUND_RECT:
 			case OUTLINE:
 			case TEXT_FIELD_PADDING:
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case MINIMUM_WIDTH:
@@ -252,38 +250,38 @@ public class FlatTextFieldUI
 			case STYLE_CLASS:
 				installStyle();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_LEADING_ICON:
 				leadingIcon = (e.getNewValue() instanceof Icon) ? (Icon) e.getNewValue() : null;
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_TRAILING_ICON:
 				trailingIcon = (e.getNewValue() instanceof Icon) ? (Icon) e.getNewValue() : null;
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_LEADING_COMPONENT:
 				uninstallLeadingComponent();
 				installLeadingComponent();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_TRAILING_COMPONENT:
 				uninstallTrailingComponent();
 				installTrailingComponent();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_SHOW_CLEAR_BUTTON:
 				uninstallClearButton();
 				installClearButton();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case "enabled":
@@ -402,7 +400,7 @@ public class FlatTextFieldUI
 
 	@Override
 	protected void paintSafely( Graphics g ) {
-		paintBackground( g, getComponent(), isIntelliJTheme, focusedBackground );
+		paintBackground( g, getComponent(), focusedBackground );
 		paintPlaceholder( g );
 
 		if( hasLeadingIcon() || hasTrailingIcon() )
@@ -422,7 +420,7 @@ debug*/
 		// background is painted elsewhere
 	}
 
-	static void paintBackground( Graphics g, JTextComponent c, boolean isIntelliJTheme, Color focusedBackground ) {
+	static void paintBackground( Graphics g, JTextComponent c, Color focusedBackground ) {
 		// do not paint background if:
 		//   - not opaque and
 		//   - border is not a flat border and
@@ -443,14 +441,14 @@ debug*/
 		try {
 			FlatUIUtils.setRenderingHints( g2 );
 
-			g2.setColor( getBackground( c, isIntelliJTheme, focusedBackground ) );
+			g2.setColor( getBackground( c, focusedBackground ) );
 			FlatUIUtils.paintComponentBackground( g2, 0, 0, c.getWidth(), c.getHeight(), focusWidth, arc );
 		} finally {
 			g2.dispose();
 		}
 	}
 
-	static Color getBackground( JTextComponent c, boolean isIntelliJTheme, Color focusedBackground ) {
+	static Color getBackground( JTextComponent c, Color focusedBackground ) {
 		Color background = c.getBackground();
 
 		// always use explicitly set color
@@ -461,10 +459,6 @@ debug*/
 		if( focusedBackground != null && FlatUIUtils.isPermanentFocusOwner( c ) )
 			return focusedBackground;
 
-		// for compatibility with IntelliJ themes
-		if( isIntelliJTheme && (!c.isEnabled() || !c.isEditable()) )
-			return FlatUIUtils.getParentBackground( c );
-
 		return background;
 	}
 
@@ -487,10 +481,22 @@ debug*/
 		// compute placeholder location
 		Rectangle r = getVisibleEditorRect();
 		FontMetrics fm = c.getFontMetrics( c.getFont() );
-		String clippedPlaceholder = JavaCompatibility.getClippedString( c, fm, placeholder, r.width );
-		int x = r.x + (isLeftToRight() ? 0 : r.width - fm.stringWidth( clippedPlaceholder ));
+		int x = r.x;
 		int y = r.y + fm.getAscent() + ((r.height - fm.getHeight()) / 2);
 
+		// apply horizontal alignment to x location
+		String clippedPlaceholder = JavaCompatibility.getClippedString( c, fm, placeholder, r.width );
+		int stringWidth = fm.stringWidth( clippedPlaceholder );
+		int halign = (c instanceof JTextField) ? ((JTextField)c).getHorizontalAlignment() : SwingConstants.LEADING;
+		if( halign == SwingConstants.LEADING )
+			halign = isLeftToRight() ? SwingConstants.LEFT : SwingConstants.RIGHT;
+		else if( halign == SwingConstants.TRAILING )
+			halign = isLeftToRight() ? SwingConstants.RIGHT : SwingConstants.LEFT;
+		if( halign == SwingConstants.RIGHT )
+			x += r.width - stringWidth;
+		else if( halign == SwingConstants.CENTER )
+			x = Math.max( 0, x + (r.width / 2) - (stringWidth / 2) );
+
 		// paint placeholder
 		g.setColor( placeholderForeground );
 		FlatUIUtils.drawString( c, g, clippedPlaceholder, x, y );
@@ -622,7 +628,7 @@ debug*/
 	/**
 	 * Returns the rectangle used to paint leading and trailing icons.
 	 * It invokes {@code super.getVisibleEditorRect()} and reduces left and/or
-	 * right margin if the text field has leading or trailing icons or components.
+	 * right insets if the text field has leading or trailing icons or components.
 	 * Also, the preferred widths of leading and trailing components are removed.
 	 *
 	 * @since 2
@@ -654,24 +660,24 @@ debug*/
 			}
 		}
 
-		// if a leading/trailing icons (or components) are shown, then the left/right margins are reduced
-		// to the top margin, which places the icon nicely centered on left/right side
+		// if a leading/trailing icons (or components) are shown, then the left/right insets are reduced
+		// to the top inset, which places the icon nicely centered on left/right side
 		if( leftVisible || (ltr ? hasLeadingIcon() : hasTrailingIcon()) ) {
-			// reduce left margin
-			Insets margin = getComponent().getMargin();
-			int newLeftMargin = Math.min( margin.left, margin.top );
-			if( newLeftMargin < margin.left ) {
-				int diff = scale( margin.left - newLeftMargin );
+			// reduce left inset
+			Insets insets = getComponent().getInsets();
+			int newLeftInset = Math.min( insets.left, insets.top );
+			if( newLeftInset < insets.left ) {
+				int diff = insets.left - newLeftInset;
 				r.x -= diff;
 				r.width += diff;
 			}
 		}
 		if( rightVisible || (ltr ? hasTrailingIcon() : hasLeadingIcon()) ) {
-			// reduce right margin
-			Insets margin = getComponent().getMargin();
-			int newRightMargin = Math.min( margin.right, margin.top );
-			if( newRightMargin < margin.left )
-				r.width += scale( margin.right - newRightMargin );
+			// reduce right inset
+			Insets insets = getComponent().getInsets();
+			int newRightInset = Math.min( insets.right, insets.top );
+			if( newRightInset < insets.left )
+				r.width += insets.right - newRightInset;
 		}
 
 		// make sure that width and height are not negative
@@ -809,7 +815,7 @@ debug*/
 		if( visible != clearButton.isVisible() ) {
 			clearButton.setVisible( visible );
 			c.revalidate();
-			c.repaint();
+			HiDPIUtils.repaint( c );
 		}
 	}