GitHub Actions: moved Error Prone checks to own workflow to reduce build time of CI workflow

- always use Java toolchains
- default is Java 11 (but source/targetCompatibility is still 1.8)
- use system property `toolchain` (e.g. `-Dtoolchain=25`) to compile with other Java versions

preparation for Gradle 9.x, which requires Java 17+ to run

.github/workflows/ci.yml

@@ -20,7 +20,6 @@ on:
 
 jobs:
   build:
-    name: build (11)
     runs-on: ubuntu-latest
 
     steps:
@@ -35,13 +34,35 @@ jobs:
           distribution: temurin  # pre-installed on ubuntu-latest
           cache: gradle
 
-      - name: Check with Error Prone
-        run: ./gradlew errorprone clean
 
-      - name: Build with Gradle
+        # test against
+        # - Java 8 (minimum requirement)
+        # - Java LTS versions (11, 17, ...)
+        # - latest Java version(s)
+
+      - name: Build with Java 8
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=8
+
+      - name: Build with Java 17 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=17
+
+      - name: Build with Java 21 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=21
+
+      - name: Build with Java 25 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=25
+
+
+      # build with Java 11 for snapshot
+
+      - name: Build with Java 11 LTS
         run: ./gradlew build
 
-      - name: Upload artifacts
+      - name: Upload artifacts to GitHub Actions
         uses: actions/upload-artifact@v4
         with:
           name: FlatLaf-build-artifacts
@@ -52,69 +73,20 @@ jobs:
             !**/*-sources.jar
 
 
-  build-on:
-    runs-on: ubuntu-latest
-    needs: build
-    if: github.repository == 'JFormDesigner/FlatLaf'
-
-    strategy:
-      matrix:
-        # test against
-        # - Java 8 (minimum requirement)
-        # - Java LTS versions (11, 17, ...)
-        # - latest Java version(s)
-        java:
-          - 8
-          - 17  # LTS
-          - 21  # LTS
-          - 23  # latest
-        toolchain: [""]
-#        include:
-#          - java: 21
-#            toolchain: 22  # latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Java ${{ matrix.java }}
-        uses: actions/setup-java@v4
-        with:
-          java-version: ${{ matrix.java }}
-          distribution: temurin  # Java 8, 11, 17 and 21 are pre-installed on ubuntu-latest
-          cache: gradle
-
-      - name: Build with Gradle
-        run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
-
-
-  snapshot:
-    runs-on: ubuntu-latest
-    needs: build-on
-    if: |
-      github.event_name == 'push' &&
-      (github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' )) &&
-      github.repository == 'JFormDesigner/FlatLaf'
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Java 11
-        uses: actions/setup-java@v4
-        with:
-          java-version: 11
-          distribution: temurin  # pre-installed on ubuntu-latest
-          cache: gradle
-
-      - name: Publish snapshot to oss.sonatype.org
+      - 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 }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
 
 
   release:
     runs-on: ubuntu-latest
-    needs: build-on
+    needs: build
     if: |
       github.event_name == 'push' &&
       startsWith( github.ref, 'refs/tags/' ) &&
@@ -131,10 +103,10 @@ jobs:
           cache: gradle
 
       - name: Release a new stable version to Maven Central
-        run: ./gradlew publish :flatlaf-demo:build :flatlaf-theme-editor:build -PskipFonts -Prelease -Dorg.gradle.parallel=false
+        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 }}
 

.github/workflows/error-prone.yml

@@ -0,0 +1,37 @@
+# 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-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 11
+        uses: actions/setup-java@v4
+        with:
+          java-version: 11
+          distribution: temurin  # pre-installed on ubuntu-latest
+          cache: gradle
+
+      - name: Check with Error Prone
+        run: ./gradlew errorprone clean

.github/workflows/fonts.yml

@@ -45,18 +45,18 @@ jobs:
               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

@@ -33,13 +33,30 @@ jobs:
 
             - uses: gradle/actions/wrapper-validation@v4
 
-            - name: install libxt-dev
+            - name: apt update (Linux)
               if: matrix.os == 'ubuntu-latest' || matrix.os == 'ubuntu-24.04-arm'
-              run: sudo apt install libxt-dev
+              run: sudo apt-get update
 
-            - name: install g++-aarch64-linux-gnu
-              if: matrix.os == 'ubuntu-latest'
-              run: sudo apt install g++-aarch64-linux-gnu
+            - 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 11
               uses: actions/setup-java@v4
@@ -53,10 +70,60 @@ jobs:
               #   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"  >> $GITHUB_ENV ;;
+                esac
+
             - name: Upload artifacts
               uses: actions/upload-artifact@v4
               with:
                   name: FlatLaf-natives-build-artifacts-${{ 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

@@ -28,10 +28,10 @@ jobs:
           distribution: temurin  # pre-installed on ubuntu-latest
           cache: gradle
 
-      - name: Publish PR snapshot to oss.sonatype.org
+      - 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:
-          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
-          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}

CHANGELOG.md

@@ -1,6 +1,71 @@
 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)
+
+#### Fixed bugs
+
+- 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

README.md

@@ -35,6 +35,8 @@ 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/) -->
@@ -72,7 +74,7 @@ build script:
 
 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/)
@@ -83,10 +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)
@@ -184,11 +186,18 @@ Applications using FlatLaf
   relational data browsing tool
 - ![Hot](images/hot.svg) [MagicPlot](https://magicplot.com/) (**commercial**) -
   Software for nonlinear fitting, plotting and data analysis
-- ![New](images/new.svg) [Constellation](https://www.constellation-app.com/) -
-  Data Visualization and Analytics (based on NetBeans platform)
-- ![New](images/new.svg)
-  [Kafka Visualizer](https://github.com/kumait/kafkavisualizer) - Kafka GUI
+- [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
 
@@ -197,11 +206,9 @@ Applications using FlatLaf
 - ![Hot](images/hot.svg)
   [Burp Suite Professional and Community Edition](https://portswigger.net/burp/pro)
   (**commercial**) - the leading software for web security testing
-- ![New](images/new.svg)
-  [Ghidra](https://github.com/NationalSecurityAgency/ghidra) - a software
+- [Ghidra](https://github.com/NationalSecurityAgency/ghidra) - a software
   reverse engineering (SRE) framework
-- ![New](images/new.svg) [jadx](https://github.com/skylot/jadx) - Dex to Java
-  decompiler
+- [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
@@ -213,13 +220,12 @@ Applications using FlatLaf
 
 - [jclasslib bytecode viewer](https://github.com/ingokegel/jclasslib)
 - [KeyStore Explorer](https://keystore-explorer.org/)
-- ![New](images/new.svg)
-  [muCommander](https://github.com/mucommander/mucommander) - lightweight
+- [muCommander](https://github.com/mucommander/mucommander) - lightweight
   cross-platform file manager
-- ![New](images/new.svg) [Guiffy](https://www.guiffy.com/) (**commercial**) -
-  advanced cross-platform Diff/Merge
-- ![New](images/new.svg) [HashGarten](https://github.com/jonelo/HashGarten) -
-  cross-platform Swing GUI for Jacksum
+- [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
@@ -228,6 +234,12 @@ Applications using FlatLaf
   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
 
@@ -235,6 +247,11 @@ Applications using FlatLaf
   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
@@ -249,8 +266,10 @@ Applications using FlatLaf
 
 - ![Hot](images/hot.svg) [jAlbum](https://jalbum.net/) (**commercial**) -
   creates photo album websites
-- ![New](images/new.svg) [MediathekView](https://mediathekview.de/) - search in
-  media libraries of various German broadcasters
+- [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
@@ -266,19 +285,31 @@ Applications using FlatLaf
   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
+### Modelling / Planning
 
-- ![New](images/new.svg) [Astah](https://astah.net/) (**commercial**) - create
-  UML, ER Diagram, Flowchart, Data Flow Diagram, Requirement Diagram, SysML
-  diagrams and more
+- ![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
 
-- ![New](images/new.svg) [Big Faceless (BFO) PDF Viewer](https://bfo.com/)
-  (**commercial**) - Swing PDF Viewer
+- [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**)
@@ -296,6 +327,9 @@ Applications using FlatLaf
 
 ### 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/) -
@@ -312,20 +346,20 @@ Applications using FlatLaf
 
 ### Messaging
 
-- ![New](images/new.svg) [Spark](https://github.com/igniterealtime/Spark) -
-  cross-platform IM client optimized for businesses and organizations
-- ![New](images/new.svg) [Chatty](https://github.com/chatty/chatty) - Twitch
-  Chat Client
+- [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
 
-- ![New](images/new.svg) ![Sponsor](images/sponsor.svg)
-  [BGBlitz](https://www.bgblitz.com/) (**commercial**) - professional Backgammon
-- ![New](images/new.svg) [MCreator](https://github.com/MCreator/MCreator) - 
-  software used to make Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons, 
-  and data packs without programming knowledge
-- ![New](images/new.svg) [MapTool](https://github.com/RPTools/maptool) - virtual
-  Tabletop for playing role-playing games
+- ![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
@@ -337,8 +371,7 @@ Applications using FlatLaf
 
 - [MooInfo](https://github.com/rememberber/MooInfo) - visual implementation of
   OSHI, to view information about the system and hardware
-- ![New](images/new.svg)
-  [Linux Task Manager (LTM)](https://github.com/ajee10x/LTM-LinuxTaskManager) -
+- [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
@@ -347,6 +380,8 @@ Applications using FlatLaf
   easy
 - [Android Tool](https://github.com/fast-geek/Android-Tool) - makes popular adb
   and fastboot commands easier to use
+- ![New](images/new.svg) [Termora](https://github.com/TermoraDev/termora) -
+  Terminal emulator and SSH client
 
 ### Miscellaneous
 

build.gradle.kts

@@ -16,6 +16,7 @@
 
 import net.ltgt.gradle.errorprone.errorprone
 
+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'
@@ -42,13 +43,12 @@ 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 ${System.getProperty( "toolchain", "11" )}" )
 println()
 
 
 plugins {
+	alias( libs.plugins.gradle.nexus.publish.plugin )
 	alias( libs.plugins.errorprone ) apply false
 }
 
@@ -143,3 +143,20 @@ allprojects {
 		}
 	}
 }
+
+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/kotlin/flatlaf-java9.gradle.kts

@@ -18,7 +18,7 @@ plugins {
 	java
 }
 
-if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
+if( java.toolchain.languageVersion.get().asInt() >= 9 ) {
 	sourceSets {
 		create( "java9" ) {
 			java {

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

@@ -29,7 +29,7 @@ plugins {
 	java
 }
 
-if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
+if( java.toolchain.languageVersion.get().asInt() >= 9 ) {
 	sourceSets {
 		create( "module-info" ) {
 			java {

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

@@ -86,24 +86,26 @@ publishing {
 		}
 	}
 
+/*
 	repositories {
 		maven {
-			name = "OSSRH"
+			name = "MavenCentral"
 
-			val releasesRepoUrl = "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
-			val snapshotsRepoUrl = "https://oss.sonatype.org/content/repositories/snapshots/"
+			val releasesRepoUrl = "https://ossrh-staging-api.central.sonatype.com/service/local/staging/deploy/maven2/"
+			val snapshotsRepoUrl = "https://central.sonatype.com/repository/maven-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
+				val sonatypeUsername: String? by project
+				val sonatypePassword: String? by project
 
-				username = System.getenv( "OSSRH_USERNAME" ) ?: ossrhUsername
-				password = System.getenv( "OSSRH_PASSWORD" ) ?: ossrhPassword
+				username = System.getenv( "SONATYPE_USERNAME" ) ?: sonatypeUsername
+				password = System.getenv( "SONATYPE_PASSWORD" ) ?: sonatypePassword
 			}
 		}
 	}
+*/
 }
 
 signing {

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

@@ -18,9 +18,6 @@ plugins {
 	java
 }
 
-val toolchainJavaVersion = System.getProperty( "toolchain" )
-if( !toolchainJavaVersion.isNullOrEmpty() ) {
-	java.toolchain {
-		languageVersion = JavaLanguageVersion.of( toolchainJavaVersion )
-	}
+java.toolchain {
+	languageVersion = JavaLanguageVersion.of( System.getProperty( "toolchain", "11" ) )
 }

flatlaf-core/build.gradle.kts

@@ -90,7 +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" ) )
 	}
 
@@ -113,6 +113,10 @@ tasks {
 					"version" to version,
 					"release" to "1.8", // Java version
 					"failonerror" to "true" )
+
+				"fixcrlf"(
+					"file" to "${project.name}-sigtest.txt",
+					"eol" to "lf" )
 			}
 		}
 	}

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 3.6
+#Version 3.6.2
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -297,6 +297,7 @@ 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"
@@ -324,7 +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,jsonColors,jsonIcons,jsonUI,namedColors,uiKeyCopying,uiKeyDoNotOverride,uiKeyExcludes,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

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

@@ -911,8 +911,7 @@ 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")
 	 */
@@ -959,9 +958,9 @@ 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

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

@@ -20,6 +20,9 @@ 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;
@@ -62,8 +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;
 	}

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;
 
 /**
@@ -147,6 +150,25 @@ public interface FlatSystemProperties
 	 */
 	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>
@@ -226,6 +248,17 @@ public interface FlatSystemProperties
 	 */
 	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

@@ -413,22 +413,37 @@ 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
 
-			// exclude properties
+			// exclude properties (1st level)
 			int dot = key.indexOf( '.' );
-			if( dot > 0 && uiKeyExcludes.contains( key.substring( 0, dot + 1 ) ) )
+			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();
+			String valueStr = value.toString().trim();
 
 			// map named colors
 			String uiValue = namedColors.get( valueStr );
@@ -657,7 +672,8 @@ public class IntelliJTheme
 		}
 	}
 
-	private static final Set<String> uiKeyExcludes;
+	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<>();
@@ -669,7 +685,7 @@ public class IntelliJTheme
 
 	static {
 		// IntelliJ UI properties that are not used in FlatLaf
-		uiKeyExcludes = new HashSet<>( Arrays.asList(
+		uiKeyExcludesStartsWith = new HashSet<>( Arrays.asList(
 			"ActionButton.", "ActionToolbar.", "ActionsList.", "AppInspector.", "AssignedMnemonic.", "Autocomplete.",
 			"AvailableMnemonic.",
 			"Badge.", "Banner.", "BigSpinner.", "Bookmark.", "BookmarkIcon.", "BookmarkMnemonicAssigned.", "BookmarkMnemonicAvailable.",
@@ -703,14 +719,24 @@ public class IntelliJTheme
 			// 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
@@ -751,6 +777,9 @@ public class IntelliJTheme
 		uiKeyMapping.put( "ProgressBar.trackColor",    "ProgressBar.background" );
 		uiKeyMapping.put( "ProgressBar.progressColor", "ProgressBar.foreground" );
 
+		// RadioButton
+		uiKeyMapping.put( "RadioButton.iconSize", "" ); // ignore (used in Rider themes)
+
 		// ScrollBar
 		uiKeyMapping.put( "ScrollBar.trackColor", "ScrollBar.track" );
 		uiKeyMapping.put( "ScrollBar.thumbColor", "ScrollBar.thumb" );

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

@@ -70,6 +70,8 @@ class LinuxPopupMenuCanceler
 	}
 
 	private void addWindowListeners( MenuElement selected ) {
+		removeWindowListeners();
+
 		// see BasicPopupMenuUI.MouseGrabber.grabWindow()
 		Component invoker = selected.getComponent();
 		if( invoker instanceof JPopupMenu )

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

@@ -25,12 +25,15 @@ import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
 import java.io.StreamTokenizer;
 import java.io.StringReader;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Executable;
 import java.lang.reflect.Method;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -112,6 +115,14 @@ class UIDefaultsLoader
 		Set<String> specialPrefixes = FlatLaf.getUIKeySpecialPrefixes();
 
 		return new Properties() {
+			@Override
+			public void load( InputStream in ) throws IOException {
+				// use UTF-8 to load properties file
+				try( Reader reader = new InputStreamReader( in, StandardCharsets.UTF_8 )) {
+					super.load( reader );
+				}
+			}
+
 			@Override
 			public synchronized Object put( Object k, Object value ) {
 				// process key prefixes (while loading properties files)
@@ -198,16 +209,46 @@ class UIDefaultsLoader
 					if( classLoader == null )
 						classLoader = FlatLaf.class.getClassLoader();
 
+					boolean found = false;
 					for( Class<?> lafClass : lafClasses ) {
 						String propertiesName = packageName + '/' + simpleClassName( lafClass ) + ".properties";
 						try( InputStream in = classLoader.getResourceAsStream( propertiesName ) ) {
-							if( in != null )
+							if( in != null ) {
 								properties.load( in );
+								found = true;
+							}
+						}
+					}
+
+					// fallback for named Java modules
+					if( !found ) {
+						// Get package URL using ClassLoader.getResource(...) because this works
+						// also in named Java modules, even without opening the package in module-info.java.
+						// This extra step is necessary because ClassLoader.getResource("<package>/<file>.properties")
+						// does not work for named Java modules.
+						URL url = classLoader.getResource( packageName );
+						if( url == null )
+							continue;
+
+						String packageUrl = url.toExternalForm();
+						if( !packageUrl.endsWith( "/" ) )
+							packageUrl = packageUrl.concat( "/" );
+
+						for( Class<?> lafClass : lafClasses ) {
+							URL propertiesUrl = new URL( packageUrl + simpleClassName( lafClass ) + ".properties" );
+
+							try( InputStream in = propertiesUrl.openStream() ) {
+								properties.load( in );
+							} catch( FileNotFoundException ex ) {
+								// ignore
+							}
 						}
 					}
 				} else if( source instanceof URL ) {
 					// load from package URL
-					URL packageUrl = (URL) source;
+					String packageUrl = ((URL)source).toExternalForm();
+					if( !packageUrl.endsWith( "/" ) )
+						packageUrl = packageUrl.concat( "/" );
 					for( Class<?> lafClass : lafClasses ) {
 						URL propertiesUrl = new URL( packageUrl + simpleClassName( lafClass ) + ".properties" );
 
@@ -649,22 +690,26 @@ class UIDefaultsLoader
 		if( value.indexOf( ',' ) >= 0 ) {
 			// Syntax: top,left,bottom,right[,lineColor[,lineThickness[,arc]]]
 			List<String> parts = splitFunctionParams( value, ',' );
-			Insets insets = parseInsets( value );
-			ColorUIResource lineColor = (parts.size() >= 5 && !parts.get( 4 ).isEmpty())
-				? (ColorUIResource) parseColorOrFunction( resolver.apply( parts.get( 4 ) ), resolver )
-				: null;
-			float lineThickness = (parts.size() >= 6 && !parts.get( 5 ).isEmpty())
-				? parseFloat( parts.get( 5 ) )
-				: 1f;
-			int arc = (parts.size() >= 7) && !parts.get( 6 ).isEmpty()
-				? parseInteger( parts.get( 6 ) )
-				: -1;
+			try {
+				Insets insets = parseInsets( value );
+				ColorUIResource lineColor = (parts.size() >= 5 && !parts.get( 4 ).isEmpty())
+					? (ColorUIResource) parseColorOrFunction( resolver.apply( parts.get( 4 ) ), resolver )
+					: null;
+				float lineThickness = (parts.size() >= 6 && !parts.get( 5 ).isEmpty())
+					? parseFloat( parts.get( 5 ) )
+					: 1f;
+				int arc = (parts.size() >= 7) && !parts.get( 6 ).isEmpty()
+					? parseInteger( parts.get( 6 ) )
+					: -1;
 
-			return (LazyValue) t -> {
-				return (lineColor != null || arc > 0)
-					? new FlatLineBorder( insets, lineColor, lineThickness, arc )
-					: new FlatEmptyBorder( insets );
-			};
+				return (LazyValue) t -> {
+					return (lineColor != null || arc > 0)
+						? new FlatLineBorder( insets, lineColor, lineThickness, arc )
+						: new FlatEmptyBorder( insets );
+				};
+			} catch( RuntimeException ex ) {
+				throw new IllegalArgumentException( "invalid border '" + value + "' (" + ex.getMessage() + ")" );
+			}
 		} else
 			return parseInstance( value, resolver, addonClassLoaders );
 	}
@@ -735,7 +780,7 @@ class UIDefaultsLoader
 				Integer.parseInt( numbers.get( 1 ) ),
 				Integer.parseInt( numbers.get( 2 ) ),
 				Integer.parseInt( numbers.get( 3 ) ) );
-		} catch( NumberFormatException ex ) {
+		} catch( NumberFormatException | IndexOutOfBoundsException ex ) {
 			throw new IllegalArgumentException( "invalid insets '" + value + "'" );
 		}
 	}
@@ -748,7 +793,7 @@ class UIDefaultsLoader
 			return new DimensionUIResource(
 				Integer.parseInt( numbers.get( 0 ) ),
 				Integer.parseInt( numbers.get( 1 ) ) );
-		} catch( NumberFormatException ex ) {
+		} catch( NumberFormatException | IndexOutOfBoundsException ex ) {
 			throw new IllegalArgumentException( "invalid size '" + value + "'" );
 		}
 	}
@@ -1379,17 +1424,17 @@ class UIDefaultsLoader
 						break;
 				}
 			}
-		} catch( IOException ex ) {
-			throw new IllegalArgumentException( ex );
+		} catch( RuntimeException | IOException ex ) {
+			throw new IllegalArgumentException(  "invalid font '" + value + "' (" + ex.getMessage() + ")" );
 		}
 
 		if( style != -1 && styleChange != 0 )
-			throw new IllegalArgumentException( "can not mix absolute style (e.g. 'bold') with derived style (e.g. '+italic') in '" + value + "'" );
+			throw new IllegalArgumentException( "invalid font '" + value + "': can not mix absolute style (e.g. 'bold') with derived style (e.g. '+italic')" );
 		if( styleChange != 0 ) {
 			if( (styleChange & Font.BOLD) != 0 && (styleChange & (Font.BOLD << 16)) != 0 )
-				throw new IllegalArgumentException( "can not use '+bold' and '-bold' in '" + value + "'" );
+				throw new IllegalArgumentException( "invalid font '" + value + "': can not use '+bold' and '-bold'" );
 			if( (styleChange & Font.ITALIC) != 0 && (styleChange & (Font.ITALIC << 16)) != 0 )
-				throw new IllegalArgumentException( "can not use '+italic' and '-italic' in '" + value + "'" );
+				throw new IllegalArgumentException( "invalid font '" + value + "': can not use '+italic' and '-italic'" );
 		}
 
 		font = new FlatLaf.ActiveFont( baseFontKey, families, style, styleChange, absoluteSize, relativeSize, scaleSize );
@@ -1529,7 +1574,7 @@ class UIDefaultsLoader
 			return (LazyValue) t -> {
 				return new GrayFilter( brightness, contrast, alpha );
 			};
-		} catch( NumberFormatException ex ) {
+		} catch( NumberFormatException | IndexOutOfBoundsException ex ) {
 			throw new IllegalArgumentException( "invalid gray filter '" + value + "'" );
 		}
 	}

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

@@ -381,6 +381,12 @@ public class FlatButtonUI
 			return ((FlatHelpButtonIcon)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 );
 

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

@@ -882,7 +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();

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

@@ -302,6 +302,7 @@ 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 &&
@@ -335,7 +336,7 @@ 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) &&
@@ -376,7 +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 );
@@ -475,4 +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/FlatNativeLinuxLibrary.java

@@ -24,6 +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;
 
 /**
@@ -34,9 +35,9 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @author Karl Tauber
  * @since 2.5
  */
-class FlatNativeLinuxLibrary
+public class FlatNativeLinuxLibrary
 {
-	private static int API_VERSION_LINUX = 3001;
+	private static int API_VERSION_LINUX = 3002;
 
 	/**
 	 * Checks whether native library is loaded/available.
@@ -44,10 +45,13 @@ class FlatNativeLinuxLibrary
 	 * <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.
 	 */
-	static boolean isLoaded() {
+	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/latest/ar01s04.html
 	static final int
@@ -124,4 +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

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Rectangle;
 import java.awt.Window;
+import javax.swing.JOptionPane;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -44,7 +45,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeMacLibrary
 {
-	private static int API_VERSION_MACOS = 2001;
+	private static int API_VERSION_MACOS = 2002;
 
 	/**
 	 * Checks whether native library is loaded/available.
@@ -68,4 +69,88 @@ public class FlatNativeMacLibrary
 	/** @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/FlatNativeWindowsLibrary.java

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
 import java.awt.Window;
+import javax.swing.JOptionPane;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -30,7 +31,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeWindowsLibrary
 {
-	private static int API_VERSION_WINDOWS = 1001;
+	private static int API_VERSION_WINDOWS = 1002;
 
 	private static long osBuildNumber = Long.MIN_VALUE;
 
@@ -158,4 +159,125 @@ public class FlatNativeWindowsLibrary
 		// 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/FlatPopupFactory.java

@@ -32,7 +32,6 @@ 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;
@@ -312,7 +311,7 @@ public class FlatPopupFactory
 			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
@@ -547,7 +546,15 @@ public class FlatPopupFactory
 			int x = popupWindow.getX();
 			int y = popupWindow.getY();
 
-			popup.show();
+			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)
@@ -619,7 +626,30 @@ public class FlatPopupFactory
 
 		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
@@ -646,8 +676,11 @@ public class FlatPopupFactory
 				return;
 			disposed = true;
 
-			// immediately hide non-heavy weight popups or combobox popups
-			if( !(popupWindow instanceof JWindow) || contents instanceof BasicComboPopup ) {
+			// 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;
 			}
@@ -678,6 +711,21 @@ 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;
 			}
 		}

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

@@ -246,7 +246,7 @@ public class FlatPopupMenuUI
 		// (always subtract screen insets because there is no API to detect whether
 		// the popup can overlap the taskbar; see JPopupMenu.canPopupOverlapTaskBar())
 		Rectangle screenBounds = gc.getBounds();
-		Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
+		Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
 		return FlatUIUtils.subtractInsets( screenBounds, screenInsets );
 	}
 

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

@@ -20,6 +20,7 @@ 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;
@@ -153,8 +154,28 @@ 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" ) );
+			}
 		}
 
 		macClearBackgroundForTranslucentWindow( c );

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

@@ -39,6 +39,7 @@ 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;
@@ -989,12 +990,14 @@ public class FlatTableUI
 
 		FlatBooleanRenderer() {
 			setHorizontalAlignment( SwingConstants.CENTER );
-			setIcon( new FlatCheckBoxIcon() {
+			Icon icon = new FlatCheckBoxIcon() {
 				@Override
 				protected boolean isSelected( Component c ) {
 					return selected;
 				}
-			} );
+			};
+			setIcon( icon );
+			setDisabledIcon( icon );
 		}
 
 		@Override

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

@@ -628,7 +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
@@ -660,24 +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

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

@@ -914,7 +914,7 @@ public class FlatTitlePane
 			// screen insets are in physical size, except for Java 15+
 			// (see https://bugs.openjdk.java.net/browse/JDK-8243925)
 			// and except for Java 8 on secondary screens where primary screen is scaled
-			Insets screenInsets = window.getToolkit().getScreenInsets( gc );
+			Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
 
 			// maximized bounds are required in physical size, except for Java 15+
 			// (see https://bugs.openjdk.java.net/browse/JDK-8231564 and

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

@@ -577,7 +577,6 @@ public class FlatTreeUI
 		boolean isEditing = (editingComponent != null && editingRow == row);
 		boolean isSelected = tree.isRowSelected( row );
 		boolean isDropRow = isDropRow( row );
-		boolean needsSelectionPainting = (isSelected || isDropRow) && isPaintSelection();
 
 		// paint alternating rows
 		if( alternateRowColor != null && row % 2 != 0 ) {
@@ -608,7 +607,7 @@ public class FlatTreeUI
 			if( isSelected && isWideSelection() ) {
 				Color oldColor = g.getColor();
 				g.setColor( selectionInactiveBackground );
-				paintWideSelection( g, bounds, row );
+				paintWideSelection( g, bounds, row, false );
 				g.setColor( oldColor );
 			}
 			return;
@@ -628,7 +627,7 @@ public class FlatTreeUI
 
 		// renderer background/foreground
 		Color oldBackgroundSelectionColor = null;
-		if( isSelected && !hasFocus && !isDropRow ) {
+		if( isSelected && !hasFocus ) {
 			// apply inactive selection background/foreground if tree is not focused
 			oldBackgroundSelectionColor = setRendererBackgroundSelectionColor( rendererComponent, selectionInactiveBackground );
 			setRendererForeground( rendererComponent, selectionInactiveForeground );
@@ -655,26 +654,12 @@ public class FlatTreeUI
 		}
 
 		// paint selection background
-		if( needsSelectionPainting ) {
-			// set selection color
-			Color oldColor = g.getColor();
-			g.setColor( isDropRow
-				? UIManager.getColor( "Tree.dropCellBackground" )
-				: (rendererComponent instanceof DefaultTreeCellRenderer
-					? ((DefaultTreeCellRenderer)rendererComponent).getBackgroundSelectionColor()
-					: (hasFocus ? selectionBackground : selectionInactiveBackground)) );
+		if( isSelected && isPaintSelection() ) {
+			Color selectionColor = rendererComponent instanceof DefaultTreeCellRenderer
+				? ((DefaultTreeCellRenderer)rendererComponent).getBackgroundSelectionColor()
+				: (hasFocus ? selectionBackground : selectionInactiveBackground);
 
-			if( isWideSelection() ) {
-				// wide selection
-				paintWideSelection( g, bounds, row );
-			} else {
-				// non-wide selection
-				paintCellBackground( g, rendererComponent, bounds, row, true );
-			}
-
-			// this is actually not necessary because renderer should always set color
-			// before painting, but doing anyway to avoid any side effect (in bad renderers)
-			g.setColor( oldColor );
+			paintRowSelection( g, selectionColor, rendererComponent, bounds, row, false );
 		} else {
 			// paint cell background if DefaultTreeCellRenderer.getBackgroundNonSelectionColor() is set
 			if( rendererComponent instanceof DefaultTreeCellRenderer ) {
@@ -683,12 +668,19 @@ public class FlatTreeUI
 				if( bg != null && !bg.equals( defaultCellNonSelectionBackground ) ) {
 					Color oldColor = g.getColor();
 					g.setColor( bg );
-					paintCellBackground( g, rendererComponent, bounds, row, false );
+					paintCellBackground( g, rendererComponent, bounds, row, false, false );
 					g.setColor( oldColor );
 				}
 			}
 		}
 
+		// paint drop background
+		// (this needs to be an extra step for rounded selection)
+		if( isDropRow && isPaintSelection() ) {
+			paintRowSelection( g, UIManager.getColor( "Tree.dropCellBackground" ),
+				rendererComponent, bounds, row, true );
+		}
+
 		// paint renderer
 		rendererPane.paintComponent( g, rendererComponent, tree, bounds.x, bounds.y, bounds.width, bounds.height, true );
 
@@ -699,6 +691,26 @@ public class FlatTreeUI
 			((DefaultTreeCellRenderer)rendererComponent).setBorderSelectionColor( oldBorderSelectionColor );
 	}
 
+	private void paintRowSelection( Graphics g, Color color, Component rendererComponent,
+		Rectangle bounds, int row, boolean paintDropSelection )
+	{
+		// set selection color
+		Color oldColor = g.getColor();
+		g.setColor( color );
+
+		if( isWideSelection() ) {
+			// wide selection
+			paintWideSelection( g, bounds, row, paintDropSelection );
+		} else {
+			// non-wide selection
+			paintCellBackground( g, rendererComponent, bounds, row, true, paintDropSelection );
+		}
+
+		// this is actually not necessary because renderer should always set color
+		// before painting, but doing anyway to avoid any side effect (in bad renderers)
+		g.setColor( oldColor );
+	}
+
 	private Color setRendererBackgroundSelectionColor( Component rendererComponent, Color color ) {
 		Color oldColor = null;
 
@@ -735,11 +747,11 @@ public class FlatTreeUI
 		return oldColor;
 	}
 
-	private void paintWideSelection( Graphics g, Rectangle bounds, int row ) {
+	private void paintWideSelection( Graphics g, Rectangle bounds, int row, boolean paintDropSelection ) {
 		float arcTop, arcBottom;
 		arcTop = arcBottom = UIScale.scale( selectionArc / 2f );
 
-		if( useUnitedRoundedSelection() ) {
+		if( useUnitedRoundedSelection() && !paintDropSelection ) {
 			if( row > 0 && tree.isRowSelected( row - 1 ) )
 				arcTop = 0;
 			if( row < tree.getRowCount() - 1 && tree.isRowSelected( row + 1 ) )
@@ -751,7 +763,7 @@ public class FlatTreeUI
 	}
 
 	private void paintCellBackground( Graphics g, Component rendererComponent, Rectangle bounds,
-		int row, boolean paintSelection )
+		int row, boolean paintSelection, boolean paintDropSelection )
 	{
 		int xOffset = 0;
 		int imageOffset = 0;
@@ -769,7 +781,7 @@ public class FlatTreeUI
 			float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
 			arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
 
-			if( useUnitedRoundedSelection() ) {
+			if( useUnitedRoundedSelection() && !paintDropSelection ) {
 				if( row > 0 && tree.isRowSelected( row - 1 ) ) {
 					Rectangle r = getPathBounds( tree, tree.getPathForRow( row - 1 ) );
 					arcTopLeft = Math.min( arcTopLeft, r.x - bounds.x );

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

@@ -26,6 +26,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
 import java.awt.Insets;
 import java.awt.KeyboardFocusManager;
 import java.awt.Paint;
@@ -34,6 +35,7 @@ import java.awt.RenderingHints;
 import java.awt.Shape;
 import java.awt.Stroke;
 import java.awt.SystemColor;
+import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
@@ -414,6 +416,17 @@ public class FlatUIUtils
 		return (fullScreenWindow != null && fullScreenWindow == SwingUtilities.windowForComponent( c ));
 	}
 
+	/** @since 3.6.1 */
+	public static Insets getScreenInsets( GraphicsConfiguration gc ) {
+		// on Linux, getScreenInsets() may report wrong values in multi-screen setups
+		// see https://github.com/apache/netbeans/issues/8532#issuecomment-2909687016
+		if( SystemInfo.isLinux &&
+			GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices().length > 1 )
+		  return new Insets( 0, 0, 0, 0 );
+
+		return Toolkit.getDefaultToolkit().getScreenInsets( gc );
+	}
+
 	public static Boolean isRoundRect( Component c ) {
 		return (c instanceof JComponent)
 			? FlatClientProperties.clientPropertyBooleanStrict(

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

@@ -331,7 +331,7 @@ public abstract class FlatWindowResizer
 		protected Rectangle getParentBounds() {
 			GraphicsConfiguration gc = window.getGraphicsConfiguration();
 			Rectangle bounds = gc.getBounds();
-			Insets insets = window.getToolkit().getScreenInsets( gc );
+			Insets insets = FlatUIUtils.getScreenInsets( gc );
 			return new Rectangle( bounds.x + insets.left, bounds.y + insets.top,
 				bounds.width - insets.left - insets.right,
 				bounds.height - insets.top - insets.bottom );

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

@@ -21,6 +21,7 @@ import java.awt.Dialog;
 import java.awt.EventQueue;
 import java.awt.Frame;
 import java.awt.GraphicsConfiguration;
+import java.awt.Insets;
 import java.awt.Point;
 import java.awt.Rectangle;
 import java.awt.Window;
@@ -39,6 +40,7 @@ import javax.swing.event.ChangeListener;
 import javax.swing.event.EventListenerList;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
+import com.formdev.flatlaf.util.UIScale;
 
 //
 // Interesting resources:
@@ -282,6 +284,8 @@ class FlatWindowsNativeWindowBorder
 			HTMINBUTTON = 8,
 			HTMAXBUTTON = 9,
 			HTTOP = 12,
+			HTTOPLEFT = 13,
+			HTTOPRIGHT = 14,
 			HTCLOSE = 20;
 
 		private Window window;
@@ -341,6 +345,31 @@ class FlatWindowsNativeWindowBorder
 			// scale-down mouse x/y because Swing coordinates/values may be scaled on a HiDPI screen
 			Point pt = scaleDown( x, y );
 
+			// limit top resize border to 4px, which seems to be standard for modern WinUI apps
+			if( isOnResizeBorder && pt.y > UIScale.scale( 4 ) )
+				isOnResizeBorder = false;
+
+			if( isOnResizeBorder ) {
+				Insets insets = window.getInsets();
+
+				// return HTTOPLEFT if mouse is over top resize border on left side
+				//   - hovering mouse shows top-left resize cursor
+				//   - left-click-and-drag resizes window
+				if( pt.x <= insets.left + UIScale.scale( 12 ) )
+					return HTTOPLEFT;
+
+				// return HTTOPRIGHT if mouse is over top resize border on right side
+				//   - hovering mouse shows top-right resize cursor
+				//   - left-click-and-drag resizes window
+				if( pt.x >= window.getWidth() - insets.right - UIScale.scale( 12 ) )
+					return HTTOPRIGHT;
+
+				// return HTTOP if mouse is over top resize border
+				//   - hovering mouse shows vertical resize cursor
+				//   - left-click-and-drag vertically resizes window
+				return HTTOP;
+			}
+
 			// return HTSYSMENU if mouse is over application icon
 			//   - left-click on HTSYSMENU area shows system menu
 			//   - double-left-click sends WM_CLOSE
@@ -364,12 +393,6 @@ class FlatWindowsNativeWindowBorder
 			if( contains( closeButtonBounds, pt ) )
 				return HTCLOSE;
 
-			// return HTTOP if mouse is over top resize border
-			//   - hovering mouse shows vertical resize cursor
-			//   - left-click and drag vertically resizes window
-			if( isOnResizeBorder )
-				return HTTOP;
-
 			boolean isOnTitleBar = (pt.y < titleBarHeight);
 			if( isOnTitleBar ) {
 				// return HTCLIENT if mouse is over any Swing component in title bar

flatlaf-core/src/main/resources/com/formdev/flatlaf/themes/FlatMacDarkLaf.properties

@@ -184,6 +184,7 @@ MenuBar.selectionEmbeddedInsets = 3,0,3,0
 MenuBar.selectionArc = 8
 MenuBar.selectionBackground = lighten(@menuBackground,15%,derived)
 MenuBar.selectionForeground = @foreground
+MenuBar.borderColor = over($Separator.foreground,$MenuBar.background)
 
 
 #---- MenuItem ----

flatlaf-core/src/main/resources/com/formdev/flatlaf/themes/FlatMacLightLaf.properties

@@ -184,6 +184,7 @@ MenuBar.selectionEmbeddedInsets = 3,0,3,0
 MenuBar.selectionArc = 8
 MenuBar.selectionBackground = darken(@menuBackground,15%,derived)
 MenuBar.selectionForeground = @foreground
+MenuBar.borderColor = over($Separator.foreground,$MenuBar.background)
 
 
 #---- MenuItem ----

flatlaf-core/src/test/java/com/formdev/flatlaf/TestUIDefaultsLoader.java

@@ -18,6 +18,7 @@ package com.formdev.flatlaf;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import java.awt.Color;
 import java.awt.Dimension;
@@ -29,6 +30,7 @@ import javax.swing.border.Border;
 import javax.swing.UIDefaults.ActiveValue;
 import javax.swing.UIDefaults.LazyValue;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.function.Executable;
 import com.formdev.flatlaf.ui.FlatEmptyBorder;
 import com.formdev.flatlaf.ui.FlatLineBorder;
 import com.formdev.flatlaf.util.DerivedColor;
@@ -452,6 +454,73 @@ public class TestUIDefaultsLoader
 		return ((LazyValue)v).createValue( null );
 	}
 
+	//---- invalid values -----------------------------------------------------
+
+	@Test
+	void parseInvalidValue() {
+		assertThrows( new IllegalArgumentException( "invalid character 'abc'" ), () -> UIDefaultsLoader.parseValue( "dummyChar", "abc", null ) );
+		assertThrows( new NumberFormatException( "invalid integer or float '123abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "123abc", null ) );
+		assertThrows( new NumberFormatException( "invalid integer or float '1.23abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "1.23abc", null ) );
+
+		assertThrows( new IllegalArgumentException( "invalid insets '1,abc,3,4'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,abc,3,4", null ) );
+		assertThrows( new IllegalArgumentException( "invalid insets '1,2,3'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,2,3", null ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1abc'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1", null ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummy", "#f0", null ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummyColor", "#f0", null ) );
+	}
+
+	@Test
+	void parseInvalidValueWithJavaType() {
+		assertThrows( new IllegalArgumentException( "invalid boolean 'falseyy'" ), () -> UIDefaultsLoader.parseValue( "dummy", "falseyy", boolean.class ) );
+		assertThrows( new IllegalArgumentException( "invalid boolean 'falseyy'" ), () -> UIDefaultsLoader.parseValue( "dummy", "falseyy", Boolean.class ) );
+
+		assertThrows( new IllegalArgumentException( "invalid character 'abc'" ), () -> UIDefaultsLoader.parseValue( "dummyChar", "abc", char.class ) );
+		assertThrows( new IllegalArgumentException( "invalid character 'abc'" ), () -> UIDefaultsLoader.parseValue( "dummyChar", "abc", Character.class ) );
+		assertThrows( new NumberFormatException( "invalid integer '123abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "123abc", int.class ) );
+		assertThrows( new NumberFormatException( "invalid integer '123abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "123abc", Integer.class ) );
+		assertThrows( new NumberFormatException( "invalid float '1.23abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "1.23abc", float.class ) );
+		assertThrows( new NumberFormatException( "invalid float '1.23abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "1.23abc", Float.class ) );
+
+		assertThrows( new IllegalArgumentException( "invalid insets '1,abc,3'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,abc,3", Insets.class ) );
+		assertThrows( new IllegalArgumentException( "invalid insets '1,2,3'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,2,3", Insets.class ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1abc'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1abc", Dimension.class ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1", Dimension.class ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummy", "#f0", Color.class ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummyColor", "#f0", Color.class ) );
+	}
+
+	@Test
+	void parseInvalidBorders() {
+		assertThrows( new IllegalArgumentException( "invalid border '1,abc,3,4' (invalid insets '1,abc,3,4')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,abc,3,4", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3' (invalid insets '1,2,3')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,,,' (invalid insets '1,2,3,,,')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,,,", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,4,#f0' (invalid color '#f0')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,4,#f0", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,4,#f00,2.5abc' (invalid float '2.5abc')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,4,#f00,2.5abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,4,#f00,2.5,6abc' (invalid integer '6abc')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,4,#f00,2.5,6abc", null ) );
+	}
+
+	@Test
+	void parseInvalidFonts() {
+		// size
+		assertThrows( new IllegalArgumentException( "invalid font '12abc' (invalid integer '12abc')" ),    () -> UIDefaultsLoader.parseValue( "dummyFont", "12abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+12abc' (invalid integer '+12abc')" ),  () -> UIDefaultsLoader.parseValue( "dummyFont", "+12abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+3abc' (invalid integer '+3abc')" ),    () -> UIDefaultsLoader.parseValue( "dummyFont", "+3abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '-4abc' (invalid integer '-4abc')" ),    () -> UIDefaultsLoader.parseValue( "dummyFont", "-4abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '150abc%' (invalid integer '150abc')" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "150abc%", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font 'bold 13abc Monospaced' (invalid integer '13abc')" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "bold 13abc Monospaced", null ) );
+
+		// invalid combinations of styles
+		assertThrows( new IllegalArgumentException( "invalid font 'bold +italic': can not mix absolute style (e.g. 'bold') with derived style (e.g. '+italic')" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "bold +italic", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+bold -bold': can not use '+bold' and '-bold'" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "+bold -bold", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+italic -italic': can not use '+italic' and '-italic'" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "+italic -italic", null ) );
+	}
+
+	private void assertThrows( Throwable expected, Executable executable ) {
+		Throwable actual = assertThrowsExactly( expected.getClass(), executable );
+		assertEquals( expected.getMessage(), actual.getMessage() );
+	}
+
 	//---- class TestInstance -------------------------------------------------
 
 	@SuppressWarnings( "EqualsHashCode" ) // Error Prone

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatButton.java

@@ -0,0 +1,404 @@
+/*
+ * 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.ui;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import java.awt.Color;
+import java.util.HashMap;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import javax.swing.JButton;
+import javax.swing.JComponent;
+import javax.swing.JRootPane;
+import javax.swing.UIManager;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatLaf;
+
+/**
+ * @author Karl Tauber
+ */
+public class TestFlatButton
+{
+	@BeforeAll
+	static void setup() {
+		String[] defs = {
+			"Button.background", "#000001",
+			"Button.foreground", "#000002",
+			"Button.focusedBackground", "#000003",
+			"Button.focusedForeground", "#000004",
+			"Button.hoverBackground", "#000005",
+			"Button.hoverForeground", "#000006",
+			"Button.pressedBackground", "#000007",
+			"Button.pressedForeground", "#000008",
+			"Button.selectedBackground", "#000009",
+			"Button.selectedForeground", "#00000a",
+			"Button.disabledBackground", "#00000b",
+			"Button.disabledText", "#00000c",
+			"Button.disabledSelectedBackground", "#00000d",
+			"Button.disabledSelectedForeground", "#00000e",
+
+			"Button.default.background", "#000101",
+			"Button.default.foreground", "#000102",
+			"Button.default.focusedBackground", "#000103",
+			"Button.default.focusedForeground", "#000104",
+			"Button.default.hoverBackground", "#000105",
+			"Button.default.hoverForeground", "#000106",
+			"Button.default.pressedBackground", "#000107",
+			"Button.default.pressedForeground", "#000108",
+
+			"Button.toolbar.hoverBackground", "#000201",
+			"Button.toolbar.hoverForeground", "#000202",
+			"Button.toolbar.pressedBackground", "#000203",
+			"Button.toolbar.pressedForeground", "#000204",
+			"Button.toolbar.selectedBackground", "#000205",
+			"Button.toolbar.selectedForeground", "#000206",
+			"Button.toolbar.disabledSelectedBackground", "#000207",
+			"Button.toolbar.disabledSelectedForeground", "#000208",
+		};
+
+		HashMap<String, String> globalExtraDefaults = new HashMap<>();
+		for( int i = 0; i < defs.length; i += 2 )
+			globalExtraDefaults.put( defs[i], defs[i+1] );
+		FlatLaf.setGlobalExtraDefaults( globalExtraDefaults );
+
+		TestUtils.setup( false );
+	}
+
+	@AfterAll
+	static void cleanup() {
+		TestUtils.cleanup();
+	}
+
+	@Test
+	void background() {
+		JButton b = new JButton();
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.background" ),
+			UIManager.getColor( "Button.disabledBackground" ),
+			UIManager.getColor( "Button.focusedBackground" ),
+			UIManager.getColor( "Button.hoverBackground" ),
+			UIManager.getColor( "Button.pressedBackground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.selectedBackground" ),
+			UIManager.getColor( "Button.disabledSelectedBackground" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedBackground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.default.background" ),
+			UIManager.getColor( "Button.disabledBackground" ),
+			UIManager.getColor( "Button.default.focusedBackground" ),
+			UIManager.getColor( "Button.default.hoverBackground" ),
+			UIManager.getColor( "Button.default.pressedBackground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void foreground() {
+		JButton b = new JButton();
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			UIManager.getColor( "Button.foreground" ),
+			UIManager.getColor( "Button.disabledText" ),
+			UIManager.getColor( "Button.focusedForeground" ),
+			UIManager.getColor( "Button.hoverForeground" ),
+			UIManager.getColor( "Button.pressedForeground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			UIManager.getColor( "Button.selectedForeground" ),
+			FlatUIUtils.getUIColor( "Button.disabledSelectedForeground", "Button.disabledText" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedForeground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			UIManager.getColor( "Button.default.foreground" ),
+			UIManager.getColor( "Button.disabledText" ),
+			UIManager.getColor( "Button.default.focusedForeground" ),
+			UIManager.getColor( "Button.default.hoverForeground" ),
+			UIManager.getColor( "Button.default.pressedForeground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void backgroundExplicit() {
+		JButton b = new JButton();
+
+		Color c = new Color( 0x020001 );
+		b.setBackground( c );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledBackground" ),
+			null,
+			UIManager.getColor( "Button.hoverBackground" ),
+			UIManager.getColor( "Button.pressedBackground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.selectedBackground" ),
+			UIManager.getColor( "Button.disabledSelectedBackground" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedBackground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledBackground" ),
+			null,
+			UIManager.getColor( "Button.default.hoverBackground" ),
+			UIManager.getColor( "Button.default.pressedBackground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void foregroundExplicit() {
+		JButton b = new JButton();
+
+		Color c = new Color( 0x020001 );
+		b.setForeground( c );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledText" ),
+			null,
+			UIManager.getColor( "Button.hoverForeground" ),
+			UIManager.getColor( "Button.pressedForeground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			FlatUIUtils.getUIColor( "Button.disabledSelectedForeground", "Button.disabledText" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedForeground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledText" ),
+			null,
+			UIManager.getColor( "Button.default.hoverForeground" ),
+			UIManager.getColor( "Button.default.pressedForeground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void backgroundStyled() {
+		JButton b = new JButton();
+
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"background: #020001;" +
+			"disabledBackground: #020002;" +
+			"focusedBackground: #020003;" +
+			"hoverBackground: #020004;" +
+			"pressedBackground: #020005;" +
+			"selectedBackground: #020006;" +
+			"disabledSelectedBackground: #020007;" );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020001 ),
+			new Color( 0x020002 ),
+			new Color( 0x020003 ),
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020006 ),
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		Color c = new Color( 0x0a0001 );
+		b.setBackground( c );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			c,
+			new Color( 0x020002 ),
+			c,
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020006 ),
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		b = new JButton();
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"default.background: #020101;" +
+			"disabledBackground: #020102;" +
+			"default.focusedBackground: #020103;" +
+			"default.hoverBackground: #020104;" +
+			"default.pressedBackground: #020105;" );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020101 ),
+			new Color( 0x020102 ),
+			new Color( 0x020103 ),
+			new Color( 0x020104 ),
+			new Color( 0x020105 ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void foregroundStyled() {
+		JButton b = new JButton();
+
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"foreground: #020001;" +
+			"disabledText: #020002;" +
+			"focusedForeground: #020003;" +
+			"hoverForeground: #020004;" +
+			"pressedForeground: #020005;" +
+			"selectedForeground: #020006;" +
+			"disabledSelectedForeground: #020007;" );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			new Color( 0x020001 ),
+			new Color( 0x020002 ),
+			new Color( 0x020003 ),
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			new Color( 0x020006 ),
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		Color c = new Color( 0x0a0001 );
+		b.setForeground( c );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			new Color( 0x020002 ),
+			c,
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		b = new JButton();
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"default.foreground: #020101;" +
+			"disabledText: #020102;" +
+			"default.focusedForeground: #020103;" +
+			"default.hoverForeground: #020104;" +
+			"default.pressedForeground: #020105;" );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			new Color( 0x020101 ),
+			new Color( 0x020102 ),
+			new Color( 0x020103 ),
+			new Color( 0x020104 ),
+			new Color( 0x020105 ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	private void testButtonColors( JButton b, Function<JButton, Color> f,
+		Color expectedEnabled, Color expectedDisabled, Color expectedFocused,
+		Color expectedHover, Color expectedPressed
+		)
+	{
+		assertEquals( expectedEnabled, f.apply( b ) );
+
+		// disabled
+		b.setEnabled( false );
+		assertEquals( expectedDisabled, f.apply( b ) );
+		b.setEnabled( true );
+
+		// focused
+		if( expectedFocused != null ) {
+			b.putClientProperty( FlatClientProperties.COMPONENT_FOCUS_OWNER, (Predicate<JComponent>) c -> true );
+			assertEquals( expectedFocused, f.apply( b ) );
+			b.putClientProperty( FlatClientProperties.COMPONENT_FOCUS_OWNER, null );
+		}
+
+		// hover
+		if( expectedHover != null ) {
+			b.getModel().setRollover( true );
+			assertEquals( expectedHover, f.apply( b ) );
+			b.getModel().setRollover( false );
+		}
+
+		// pressed
+		if( expectedPressed != null ) {
+			b.getModel().setPressed( true );
+			assertEquals( expectedPressed, f.apply( b ) );
+			b.getModel().setPressed( false );
+		}
+	}
+}

flatlaf-demo/build.gradle.kts

@@ -46,7 +46,7 @@ tasks {
 		manifest {
 			attributes( "Main-Class" to "com.formdev.flatlaf.demo.FlatLafDemo" )
 
-			if( JavaVersion.current() >= JavaVersion.VERSION_1_9 )
+			if( java.toolchain.languageVersion.get().asInt() >= 9 )
 				attributes( "Multi-Release" to "true" )
 
 			// allow loading FlatLaf native library in Java 24+ (see https://openjdk.org/jeps/472)

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/DemoFrame.java

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.demo;
 
 import java.awt.*;
 import java.awt.event.*;
+import java.io.File;
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -49,6 +50,7 @@ import com.formdev.flatlaf.extras.FlatSVGUtils;
 import com.formdev.flatlaf.util.ColorFunctions;
 import com.formdev.flatlaf.util.FontUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
+import com.formdev.flatlaf.util.SystemFileChooser;
 import com.formdev.flatlaf.util.SystemInfo;
 import net.miginfocom.layout.ConstraintParser;
 import net.miginfocom.layout.LC;
@@ -172,6 +174,48 @@ class DemoFrame
 		chooser.showSaveDialog( this );
 	}
 
+	private void openSystemActionPerformed() {
+		SystemFileChooser chooser = new SystemFileChooser();
+		chooser.setMultiSelectionEnabled( true );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Text Files", "txt", "md" ) );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"PDF Files", "pdf" ) );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Archives", "zip", "tar", "jar", "7z" ) );
+
+		if( chooser.showOpenDialog( this ) != SystemFileChooser.APPROVE_OPTION )
+			return;
+
+		File[] files = chooser.getSelectedFiles();
+		System.out.println( Arrays.toString( files ).replace( ",", "\n" ) );
+	}
+
+	private void saveAsSystemActionPerformed() {
+		SystemFileChooser chooser = new SystemFileChooser();
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Text Files", "txt", "md" ) );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Images", "png", "gif", "jpg" ) );
+
+		if( chooser.showSaveDialog( this ) != SystemFileChooser.APPROVE_OPTION )
+			return;
+
+		File file = chooser.getSelectedFile();
+		System.out.println( file );
+	}
+
+	private void selectFolderSystemActionPerformed() {
+		SystemFileChooser chooser = new SystemFileChooser();
+		chooser.setFileSelectionMode( SystemFileChooser.DIRECTORIES_ONLY );
+
+		if( chooser.showOpenDialog( this ) != SystemFileChooser.APPROVE_OPTION )
+			return;
+
+		File directory  = chooser.getSelectedFile();
+		System.out.println( directory  );
+	}
+
 	private void exitActionPerformed() {
 		dispose();
 	}
@@ -508,6 +552,9 @@ class DemoFrame
 		JMenuItem newMenuItem = new JMenuItem();
 		JMenuItem openMenuItem = new JMenuItem();
 		JMenuItem saveAsMenuItem = new JMenuItem();
+		JMenuItem openSystemMenuItem = new JMenuItem();
+		JMenuItem saveAsSystemMenuItem = new JMenuItem();
+		JMenuItem selectFolderSystemMenuItem = new JMenuItem();
 		JMenuItem closeMenuItem = new JMenuItem();
 		exitMenuItem = new JMenuItem();
 		JMenu editMenu = new JMenu();
@@ -608,6 +655,25 @@ class DemoFrame
 				fileMenu.add(saveAsMenuItem);
 				fileMenu.addSeparator();
 
+				//---- openSystemMenuItem ----
+				openSystemMenuItem.setText("Open (System)...");
+				openSystemMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.SHIFT_DOWN_MASK));
+				openSystemMenuItem.addActionListener(e -> openSystemActionPerformed());
+				fileMenu.add(openSystemMenuItem);
+
+				//---- saveAsSystemMenuItem ----
+				saveAsSystemMenuItem.setText("Save As (System)...");
+				saveAsSystemMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.SHIFT_DOWN_MASK));
+				saveAsSystemMenuItem.addActionListener(e -> saveAsSystemActionPerformed());
+				fileMenu.add(saveAsSystemMenuItem);
+
+				//---- selectFolderSystemMenuItem ----
+				selectFolderSystemMenuItem.setText("Select Folder (System)...");
+				selectFolderSystemMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.SHIFT_DOWN_MASK));
+				selectFolderSystemMenuItem.addActionListener(e -> selectFolderSystemActionPerformed());
+				fileMenu.add(selectFolderSystemMenuItem);
+				fileMenu.addSeparator();
+
 				//---- closeMenuItem ----
 				closeMenuItem.setText("Close");
 				closeMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/DemoFrame.jfd

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "8.2.1.0.348" Java: "21.0.1" encoding: "UTF-8"
+JFDML JFormDesigner: "8.3" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -182,6 +182,27 @@ new FormModel {
 						"mnemonic": 83
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "saveAsActionPerformed", false ) )
 					} )
+					add( new FormComponent( "javax.swing.JPopupMenu$Separator" ) {
+						name: "separator9"
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "openSystemMenuItem"
+						"text": "Open (System)..."
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 79, 4291, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "openSystemActionPerformed", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "saveAsSystemMenuItem"
+						"text": "Save As (System)..."
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 83, 4291, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "saveAsSystemActionPerformed", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "selectFolderSystemMenuItem"
+						"text": "Select Folder (System)..."
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 70, 4291, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "selectFolderSystemActionPerformed", false ) )
+					} )
 					add( new FormComponent( "javax.swing.JPopupMenu$Separator" ) {
 						name: "separator2"
 					} )

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/FlatLafDemo.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.demo;
 
 import java.awt.Dimension;
+import java.util.prefs.Preferences;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
 import javax.swing.SwingUtilities;
@@ -27,6 +28,7 @@ import com.formdev.flatlaf.fonts.inter.FlatInterFont;
 import com.formdev.flatlaf.fonts.jetbrains_mono.FlatJetBrainsMonoFont;
 import com.formdev.flatlaf.fonts.roboto.FlatRobotoFont;
 import com.formdev.flatlaf.fonts.roboto_mono.FlatRobotoMonoFont;
+import com.formdev.flatlaf.util.SystemFileChooser;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -73,6 +75,28 @@ public class FlatLafDemo
 		DemoPrefs.init( PREFS_ROOT_PATH );
 		DemoPrefs.initSystemScale();
 
+		// SystemFileChooser state storage
+		SystemFileChooser.setStateStore( new SystemFileChooser.StateStore() {
+			private static final String KEY_PREFIX = "fileChooser.";
+			private final Preferences state = Preferences.userRoot().node( PREFS_ROOT_PATH );
+
+			@Override
+			public String get( String key, String def ) {
+				String value = state.get( KEY_PREFIX + key, def );
+				System.out.println( "SystemFileChooser State GET " + key + " = " + value );
+				return value;
+			}
+
+			@Override
+			public void put( String key, String value ) {
+				System.out.println( "SystemFileChooser State PUT " + key + " = " + value );
+				if( value != null )
+					state.put( KEY_PREFIX + key, value );
+				else
+					state.remove( KEY_PREFIX + key );
+			}
+		} );
+
 		SwingUtilities.invokeLater( () -> {
 			// install fonts for lazy loading
 			FlatInterFont.installLazy();

flatlaf-extras/README.md

@@ -35,11 +35,16 @@ build script:
 
 Otherwise, download `flatlaf-extras-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-extras/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-extras)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-extras?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-extras)
 
 If SVG classes are used, `jsvg-<version>.jar` is also required:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.github.weisj/jsvg/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.github.weisj/jsvg)
+[![Maven Central](https://img.shields.io/maven-central/v/com.github.weisj/jsvg?style=flat-square)](https://central.sonatype.com/artifact/com.github.weisj/jsvg)
+
+Supported JSVG versions:
+
+- FlatLaf 3.6.1+ supports JSVG 1.6.0 and later.
+- FlatLaf 3.6- supports only JSVG 1.x (but not 2.x).
 
 
 Tools

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatAnimatedLafChange.java

@@ -26,6 +26,7 @@ import java.util.Map;
 import java.util.WeakHashMap;
 import javax.swing.JComponent;
 import javax.swing.JLayeredPane;
+import javax.swing.JRootPane;
 import javax.swing.RootPaneContainer;
 import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.Animator;
@@ -52,15 +53,13 @@ public class FlatAnimatedLafChange
 	public static int duration = 160;
 
 	/**
-	 * The resolution of the animation in milliseconds. Default is 30 ms.
+	 * The resolution of the animation in milliseconds. Default is 16 ms.
 	 */
-	public static int resolution = 30;
+	public static int resolution = 16;
 
 	private static Animator animator;
-	private static final Map<JLayeredPane, JComponent> oldUIsnapshots = new WeakHashMap<>();
-	private static final Map<JLayeredPane, JComponent> newUIsnapshots = new WeakHashMap<>();
+	private static final Map<JLayeredPane, SnapshotLayer> snapshots = new WeakHashMap<>();
 	private static float alpha;
-	private static boolean inShowSnapshot;
 
 	/**
 	 * Create a snapshot of the old UI and shows it on top of the UI.
@@ -77,59 +76,52 @@ public class FlatAnimatedLafChange
 		alpha = 1;
 
 		// show snapshot of old UI
-		showSnapshot( true, oldUIsnapshots );
+		showSnapshot( true );
 	}
 
-	private static void showSnapshot( boolean useAlpha, Map<JLayeredPane, JComponent> map ) {
-		inShowSnapshot = true;
-
+	private static void showSnapshot( boolean old ) {
 		// create snapshots for all shown windows
 		Window[] windows = Window.getWindows();
 		for( Window window : windows ) {
 			if( !(window instanceof RootPaneContainer) || !window.isShowing() )
 				continue;
 
+			JLayeredPane layeredPane = ((RootPaneContainer)window).getLayeredPane();
+
 			// create snapshot image
 			// (using volatile image to have correct sub-pixel text rendering on Java 9+)
-			VolatileImage snapshot = window.createVolatileImage( window.getWidth(), window.getHeight() );
-			if( snapshot == null )
+			VolatileImage snapshotImage = layeredPane.createVolatileImage( layeredPane.getWidth(), layeredPane.getHeight() );
+			if( snapshotImage == null )
 				continue;
 
 			// paint window to snapshot image
-			JLayeredPane layeredPane = ((RootPaneContainer)window).getLayeredPane();
-			layeredPane.paint( snapshot.getGraphics() );
+			layeredPane.paint( snapshotImage.getGraphics() );
 
-			// create snapshot layer, which is added to layered pane and paints
-			// snapshot with animated alpha
-			JComponent snapshotLayer = new JComponent() {
-				@Override
-				public void paint( Graphics g ) {
-					if( inShowSnapshot || snapshot.contentsLost() )
-						return;
-
-					if( useAlpha )
-						((Graphics2D)g).setComposite( AlphaComposite.getInstance( AlphaComposite.SRC_OVER, alpha ) );
-					g.drawImage( snapshot, 0, 0, null );
-				}
-
-				@Override
-				public void removeNotify() {
-					super.removeNotify();
-
-					// release system resources used by volatile image
-					snapshot.flush();
-				}
-			};
-			if( !useAlpha )
+			if( old ) {
+				// create snapshot layer, which is added to layered pane and paints
+				// snapshot with animated alpha
+				SnapshotLayer snapshotLayer = new SnapshotLayer();
 				snapshotLayer.setOpaque( true );
-			snapshotLayer.setSize( layeredPane.getSize() );
+				snapshotLayer.setSize( layeredPane.getSize() );
+				snapshotLayer.oldSnapshotImage = snapshotImage;
 
-			// add image layer to layered pane
-			layeredPane.add( snapshotLayer, Integer.valueOf( JLayeredPane.DRAG_LAYER + (useAlpha ? 2 : 1) ) );
-			map.put( layeredPane, snapshotLayer );
+				snapshots.put( layeredPane, snapshotLayer );
+			} else {
+				SnapshotLayer snapshotLayer = snapshots.get( layeredPane );
+				if( snapshotLayer == null ) {
+					snapshotImage.flush();
+					continue;
+				}
+
+				snapshotLayer.newSnapshotImage = snapshotImage;
+
+				// add snapshot layer to layered pane
+				layeredPane.add( snapshotLayer, Integer.valueOf( JLayeredPane.DRAG_LAYER + 1 ) );
+
+				// let FlatRootPaneUI know that animated Laf change is in progress
+				layeredPane.getRootPane().putClientProperty( "FlatLaf.internal.animatedLafChange", true );
+			}
 		}
-
-		inShowSnapshot = false;
 	}
 
 	/**
@@ -141,23 +133,22 @@ public class FlatAnimatedLafChange
 		if( !FlatSystemProperties.getBoolean( "flatlaf.animatedLafChange", true ) )
 			return;
 
-		if( oldUIsnapshots.isEmpty() )
+		if( snapshots.isEmpty() )
 			return;
 
 		// show snapshot of new UI
-		showSnapshot( false, newUIsnapshots );
+		showSnapshot( false );
 
 		// create animator
 		animator = new Animator( duration, fraction -> {
-			if( fraction < 0.1 || fraction > 0.9 )
-				return; // ignore initial and last events
-
 			alpha = 1f - fraction;
 
 			// repaint snapshots
-			for( Map.Entry<JLayeredPane, JComponent> e : oldUIsnapshots.entrySet() ) {
-				if( e.getKey().isShowing() )
-					e.getValue().repaint();
+			for( Map.Entry<JLayeredPane, SnapshotLayer> e : snapshots.entrySet() ) {
+				if( e.getKey().isShowing() ) {
+					SnapshotLayer snapshotLayer = e.getValue();
+					snapshotLayer.paintImmediately( 0, 0, snapshotLayer.getWidth(),snapshotLayer.getHeight() );
+				}
 			}
 
 			Toolkit.getDefaultToolkit().sync();
@@ -171,18 +162,27 @@ public class FlatAnimatedLafChange
 	}
 
 	private static void hideSnapshot() {
-		hideSnapshot( oldUIsnapshots );
-		hideSnapshot( newUIsnapshots );
-	}
-
-	private static void hideSnapshot( Map<JLayeredPane, JComponent> map ) {
 		// remove snapshots
-		for( Map.Entry<JLayeredPane, JComponent> e : map.entrySet() ) {
-			e.getKey().remove( e.getValue() );
-			e.getKey().repaint();
+		for( Map.Entry<JLayeredPane, SnapshotLayer> e : snapshots.entrySet() ) {
+			JLayeredPane layeredPane = e.getKey();
+			SnapshotLayer snapshotLayer = e.getValue();
+
+			layeredPane.remove( snapshotLayer );
+			layeredPane.repaint();
+
+			snapshotLayer.flushSnapshotImages();
+
+			// run Runnable that FlatRootPaneUI put into client properties
+			JRootPane rootPane = layeredPane.getRootPane();
+			rootPane.putClientProperty( "FlatLaf.internal.animatedLafChange", null );
+			Runnable r = (Runnable) rootPane.getClientProperty( "FlatLaf.internal.animatedLafChange.runWhenFinished" );
+			if( r != null ) {
+				rootPane.putClientProperty( "FlatLaf.internal.animatedLafChange.runWhenFinished", null );
+				r.run();
+			}
 		}
 
-		map.clear();
+		snapshots.clear();
 	}
 
 	/**
@@ -194,4 +194,40 @@ public class FlatAnimatedLafChange
 		else
 			hideSnapshot();
 	}
+
+	//---- class SnapshotLayer ------------------------------------------------
+
+	private static class SnapshotLayer
+		extends JComponent
+	{
+		VolatileImage oldSnapshotImage;
+		VolatileImage newSnapshotImage;
+
+		@Override
+		public void paint( Graphics g ) {
+			if( oldSnapshotImage.contentsLost() ||
+				newSnapshotImage == null || newSnapshotImage.contentsLost() )
+			  return;
+
+			// draw new UI snapshot
+			g.drawImage( newSnapshotImage, 0, 0, null );
+
+			// draw old UI snapshot
+			((Graphics2D)g).setComposite( AlphaComposite.getInstance( AlphaComposite.SRC_OVER, alpha ) );
+			g.drawImage( oldSnapshotImage, 0, 0, null );
+		}
+
+		@Override
+		public void removeNotify() {
+			super.removeNotify();
+			flushSnapshotImages();
+		}
+
+		void flushSnapshotImages() {
+			// release system resources used by volatile image
+			oldSnapshotImage.flush();
+			if( newSnapshotImage != null )
+				newSnapshotImage.flush();
+		}
+	}
 }

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java

@@ -25,6 +25,7 @@ import java.awt.Image;
 import java.awt.Paint;
 import java.awt.Rectangle;
 import java.awt.RenderingHints;
+import java.awt.geom.Dimension2D;
 import java.awt.LinearGradientPaint;
 import java.awt.image.BufferedImage;
 import java.awt.image.RGBImageFilter;
@@ -52,7 +53,7 @@ import com.formdev.flatlaf.util.MultiResolutionImageSupport;
 import com.formdev.flatlaf.util.SoftCache;
 import com.formdev.flatlaf.util.UIScale;
 import com.github.weisj.jsvg.SVGDocument;
-import com.github.weisj.jsvg.geometry.size.FloatSize;
+import com.github.weisj.jsvg.parser.LoaderContext;
 import com.github.weisj.jsvg.parser.SVGLoader;
 
 /**
@@ -271,7 +272,7 @@ public class FlatSVGIcon
 		this( null, -1, -1, 1, false, null, null );
 
 		try( InputStream in2 = in ) {
-			document = svgLoader.load( in2 );
+			document = svgLoader.load( in2, null, LoaderContext.createDefault() );
 
 			if( document == null ) {
 				loadFailed = true;
@@ -620,9 +621,9 @@ public class FlatSVGIcon
 
 		UIScale.scaleGraphics( g );
 		if( width > 0 || height > 0 ) {
-			FloatSize svgSize = document.size();
-			double sx = (width > 0) ? width / svgSize.width : 1;
-			double sy = (height > 0) ? height / svgSize.height : 1;
+			Dimension2D svgSize = document.size();
+			double sx = (width > 0) ? width / svgSize.getWidth() : 1;
+			double sy = (height > 0) ? height / svgSize.getHeight() : 1;
 			if( sx != 1 || sy != 1 )
 				g.scale( sx, sy );
 		}

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGUtils.java

@@ -19,6 +19,7 @@ package com.formdev.flatlaf.extras;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
 import java.awt.Image;
+import java.awt.geom.Dimension2D;
 import java.awt.image.BufferedImage;
 import java.net.URL;
 import java.util.Arrays;
@@ -28,7 +29,6 @@ import javax.swing.JWindow;
 import com.formdev.flatlaf.util.MultiResolutionImageSupport;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.github.weisj.jsvg.SVGDocument;
-import com.github.weisj.jsvg.geometry.size.FloatSize;
 
 /**
  * Utility methods for SVG.
@@ -180,9 +180,9 @@ public class FlatSVGUtils
 	 */
 	public static BufferedImage svg2image( URL svgUrl, float scaleFactor ) {
 		SVGDocument document = FlatSVGIcon.loadSVG( svgUrl );
-		FloatSize size = document.size();
-		int width = (int) (size.width * scaleFactor);
-		int height = (int) (size.height * scaleFactor);
+		Dimension2D size = document.size();
+		int width = (int) (size.getWidth() * scaleFactor);
+		int height = (int) (size.getHeight() * scaleFactor);
 		return svg2image( document, width, height );
 	}
 
@@ -202,9 +202,9 @@ public class FlatSVGUtils
 		try {
 			FlatSVGIcon.setRenderingHints( g );
 
-			FloatSize size = document.size();
-			double sx = width / size.width;
-			double sy = height / size.height;
+			Dimension2D size = document.size();
+			double sx = width / size.getWidth();
+			double sy = height / size.getHeight();
 			if( sx != 1 || sy != 1 )
 				g.scale( sx, sy );
 

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatUIDefaultsInspector.java

@@ -202,6 +202,7 @@ public class FlatUIDefaultsInspector
 		JFrame frame = new JFrame();
 		frame.setTitle( "UI Defaults Inspector" );
 		frame.setDefaultCloseOperation( WindowConstants.DISPOSE_ON_CLOSE );
+		frame.setModalExclusionType( Dialog.ModalExclusionType.TOOLKIT_EXCLUDE );
 		frame.addWindowListener( new WindowAdapter() {
 			@Override
 			public void windowClosed( WindowEvent e ) {

flatlaf-fonts/flatlaf-fonts-inter/README.md

@@ -102,4 +102,4 @@ build script:
 
 Otherwise, download `flatlaf-fonts-inter-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-inter/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-inter)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-fonts-inter?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-fonts-inter)

flatlaf-fonts/flatlaf-fonts-inter/build.gradle.kts

@@ -26,6 +26,7 @@ if( !rootProject.hasProperty( "release" ) )
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-publish`
 }

flatlaf-fonts/flatlaf-fonts-jetbrains-mono/README.md

@@ -83,4 +83,4 @@ build script:
 
 Otherwise, download `flatlaf-fonts-jetbrains-mono-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-jetbrains-mono/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-jetbrains-mono)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-fonts-jetbrains-mono?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-fonts-jetbrains-mono)

flatlaf-fonts/flatlaf-fonts-jetbrains-mono/build.gradle.kts

@@ -26,6 +26,7 @@ if( !rootProject.hasProperty( "release" ) )
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-publish`
 }

flatlaf-fonts/flatlaf-fonts-roboto-mono/README.md

@@ -83,4 +83,4 @@ build script:
 
 Otherwise, download `flatlaf-fonts-roboto-mono-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-roboto-mono/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-roboto-mono)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-fonts-roboto-mono?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-fonts-roboto-mono)

flatlaf-fonts/flatlaf-fonts-roboto-mono/build.gradle.kts

@@ -26,6 +26,7 @@ if( !rootProject.hasProperty( "release" ) )
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-publish`
 }

flatlaf-fonts/flatlaf-fonts-roboto/README.md

@@ -99,4 +99,4 @@ build script:
 
 Otherwise, download `flatlaf-fonts-roboto-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-roboto/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-roboto)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-fonts-roboto?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-fonts-roboto)

flatlaf-fonts/flatlaf-fonts-roboto/build.gradle.kts

@@ -26,6 +26,7 @@ if( !rootProject.hasProperty( "release" ) )
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-publish`
 }

flatlaf-intellij-themes/README.md

@@ -22,7 +22,7 @@ build script:
 
 Otherwise, download `flatlaf-intellij-themes-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-intellij-themes/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-intellij-themes)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-intellij-themes?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-intellij-themes)
 
 
 How to use?

flatlaf-jide-oss/README.md

@@ -37,10 +37,10 @@ build script:
 
 Otherwise, download `flatlaf-jide-oss-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-jide-oss/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-jide-oss)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-jide-oss?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-jide-oss)
 
 
 JIDE Common Layer library `jide-oss-<version>.jar` (or
 `jide-common-<version>.jar`) is also required:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/jide-oss/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/jide-oss)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/jide-oss?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/jide-oss)

flatlaf-jide-oss/src/main/java/com/formdev/flatlaf/jideoss/ui/FlatJidePainter.java

@@ -65,6 +65,7 @@ public class FlatJidePainter
 			Color oldColor = g.getColor();
 			g.setColor( FlatUIUtils.deriveColor( background, c.getBackground() ) );
 			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+			float arc = UIScale.scale( (float) this.arc );
 
 			if( c instanceof JideSplitButton ) {
 				// For split buttons, this method is invoked twice:
@@ -74,6 +75,8 @@ public class FlatJidePainter
 				// the rounded rectangle with component bounds, but clip to the passed rectangle.
 
 				boolean horizontal = (((JideSplitButton)c).getOrientation() == SwingConstants.HORIZONTAL);
+				int width = horizontal ? c.getWidth() : c.getHeight();
+				int height = horizontal ? c.getHeight() : c.getWidth();
 
 				// for vertical orientation, the graphics context is rotated, but 1px wrong
 				if( !horizontal )
@@ -82,10 +85,13 @@ public class FlatJidePainter
 				Shape oldClip = g.getClip();
 				g.clipRect( rect.x, rect.y, rect.width, rect.height );
 
-				FlatUIUtils.paintComponentBackground( (Graphics2D) g, 0, 0,
-					horizontal ? c.getWidth() : c.getHeight(),
-					horizontal ? c.getHeight() : c.getWidth(),
-					0, UIScale.scale( (float) arc ) );
+				FlatUIUtils.paintComponentBackground( (Graphics2D) g, 0, 0, width, height, 0, arc );
+
+				if( borderColor != null ) {
+					g.setColor( borderColor );
+					FlatUIUtils.paintOutlinedComponent( (Graphics2D) g, 0, 0, width, height,
+						0, 0, 0, UIScale.scale( 1f ), arc, null, borderColor, null );
+				}
 
 				g.setClip( oldClip );
 
@@ -98,8 +104,15 @@ public class FlatJidePainter
 				if( !horizontal )
 					g.translate( 0, 1 );
 			} else {
-				FlatUIUtils.paintComponentBackground( (Graphics2D) g, rect.x, rect.y,
-					rect.width, rect.height, 0, UIScale.scale( (float) arc ) );
+				FlatUIUtils.paintComponentBackground( (Graphics2D) g,
+					rect.x, rect.y, rect.width, rect.height, 0, arc );
+
+				if( borderColor != null ) {
+					g.setColor( borderColor );
+					FlatUIUtils.paintOutlinedComponent( (Graphics2D) g,
+						rect.x, rect.y, rect.width, rect.height,
+						0, 0, 0, UIScale.scale( 1f ), arc, null, borderColor, null );
+				}
 			}
 
 			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );

flatlaf-jide-oss/src/main/java/com/formdev/flatlaf/jideoss/ui/FlatJideSplitButtonUI.java

@@ -25,9 +25,11 @@ import java.awt.geom.Rectangle2D;
 import javax.swing.ButtonModel;
 import javax.swing.JComponent;
 import javax.swing.JMenuItem;
+import javax.swing.JPopupMenu;
 import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.PopupMenuUI;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.UIScale;
 import com.jidesoft.plaf.LookAndFeelFactory;
@@ -54,6 +56,14 @@ public class FlatJideSplitButtonUI
 		// but it does not because FlatLaf already has added the UI class to the UI defaults
 		LookAndFeelFactory.installJideExtension();
 
+		// workaround for bug in JideSplitButton, which overrides JMenu.updateUI(),
+		// but does not invoke super.updateUI() to update UI of JMenu.popupMenu field
+		if( c instanceof JideSplitButton ) {
+			JPopupMenu popupMenu = ((JideSplitButton)c).getPopupMenu();
+			if( popupMenu != null )
+				popupMenu.setUI( (PopupMenuUI) UIManager.getUI( popupMenu ) );
+		}
+
 		return new FlatJideSplitButtonUI();
 	}
 

flatlaf-natives/flatlaf-natives-jna/src/main/java/com/formdev/flatlaf/natives/jna/windows/FlatWindowsNativeWindowBorder.java

@@ -24,6 +24,7 @@ import java.awt.Dialog;
 import java.awt.EventQueue;
 import java.awt.Frame;
 import java.awt.GraphicsConfiguration;
+import java.awt.Insets;
 import java.awt.Point;
 import java.awt.Rectangle;
 import java.awt.Window;
@@ -42,6 +43,7 @@ import javax.swing.event.ChangeListener;
 import javax.swing.event.EventListenerList;
 import com.formdev.flatlaf.ui.FlatNativeWindowBorder;
 import com.formdev.flatlaf.util.SystemInfo;
+import com.formdev.flatlaf.util.UIScale;
 import com.sun.jna.Native;
 import com.sun.jna.Pointer;
 import com.sun.jna.Structure;
@@ -326,6 +328,8 @@ public class FlatWindowsNativeWindowBorder
 			HTMINBUTTON = 8,
 			HTMAXBUTTON = 9,
 			HTTOP = 12,
+			HTTOPLEFT = 13,
+			HTTOPRIGHT = 14,
 			HTCLOSE = 20;
 
 		private static final int ABS_AUTOHIDE = 0x0000001;
@@ -674,6 +678,35 @@ public class FlatWindowsNativeWindowBorder
 			// scale-down mouse x/y because Swing coordinates/values may be scaled on a HiDPI screen
 			Point pt = scaleDown( x, y );
 
+			int resizeBorderHeight = getResizeHandleHeight();
+			boolean isOnResizeBorder = (y < resizeBorderHeight) &&
+				(User32.INSTANCE.GetWindowLong( hwnd, GWL_STYLE ) & WS_THICKFRAME) != 0;
+
+			// limit top resize border to 4px, which seems to be standard for modern WinUI apps
+			if( isOnResizeBorder && pt.y > UIScale.scale( 4 ) )
+				isOnResizeBorder = false;
+
+			if( isOnResizeBorder ) {
+				Insets insets = window.getInsets();
+
+				// return HTTOPLEFT if mouse is over top resize border on left side
+				//   - hovering mouse shows top-left resize cursor
+				//   - left-click-and-drag resizes window
+				if( pt.x <= insets.left + UIScale.scale( 12 ) )
+					return new LRESULT( HTTOPLEFT );
+
+				// return HTTOPRIGHT if mouse is over top resize border on right side
+				//   - hovering mouse shows top-right resize cursor
+				//   - left-click-and-drag resizes window
+				if( pt.x >= window.getWidth() - insets.right - UIScale.scale( 12 ) )
+					return new LRESULT( HTTOPRIGHT );
+
+				// return HTTOP if mouse is over top resize border
+				//   - hovering mouse shows vertical resize cursor
+				//   - left-click-and-drag vertically resizes window
+				return new LRESULT( HTTOP );
+			}
+
 			// return HTSYSMENU if mouse is over application icon
 			//   - left-click on HTSYSMENU area shows system menu
 			//   - double-left-click sends WM_CLOSE
@@ -697,16 +730,6 @@ public class FlatWindowsNativeWindowBorder
 			if( contains( closeButtonBounds, pt ) )
 				return new LRESULT( HTCLOSE );
 
-			int resizeBorderHeight = getResizeHandleHeight();
-			boolean isOnResizeBorder = (y < resizeBorderHeight) &&
-				(User32.INSTANCE.GetWindowLong( hwnd, GWL_STYLE ) & WS_THICKFRAME) != 0;
-
-			// return HTTOP if mouse is over top resize border
-			//   - hovering mouse shows vertical resize cursor
-			//   - left-click and drag vertically resizes window
-			if( isOnResizeBorder )
-				return new LRESULT( HTTOP );
-
 			boolean isOnTitleBar = (pt.y < titleBarHeight);
 			if( isOnTitleBar ) {
 				// return HTCLIENT if mouse is over any Swing component in title bar

flatlaf-natives/flatlaf-natives-linux/README.md

@@ -25,6 +25,7 @@ To build the library on Linux, some packages needs to be installed:
 
 - `build-essential` - GCC and development tools
 - `libxt-dev` - X11 toolkit development headers
+- `libgtk-3-dev` - GTK 3 toolkit development headers
 - `g++-aarch64-linux-gnu` - GNU C++ compiler for the arm64 architecture (only on
   x86_64 Linux for cross-compiling for arm64 architecture)
 
@@ -32,19 +33,39 @@ To build the library on Linux, some packages needs to be installed:
 ### Ubuntu
 
 ~~~
-sudo apt update
-sudo apt install build-essential libxt-dev
+sudo apt-get update
+sudo apt-get install build-essential libxt-dev libgtk-3-dev
 ~~~
 
-Only on x86_64 Linux for cross-compiling for arm64 architecture:
+#### Cross-compile for arm64 architecture on x86_64 Linux
+
+Only needed on x86_64 Linux if you want cross-compile for arm64 architecture:
 
 ~~~
-sudo apt install g++-aarch64-linux-gnu
+sudo apt-get install g++-aarch64-linux-gnu
+~~~
+
+Download `libgtk-3.so` for arm64 architecture:
+
+~~~
+cd flatlaf-natives/flatlaf-natives-linux/lib/aarch64
+wget --no-verbose https://ports.ubuntu.com/pool/main/g/gtk%2b3.0/libgtk-3-0_3.24.18-1ubuntu1_arm64.deb
+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
+~~~
+
+
+### Fedora
+
+~~~
+sudo dnf group install c-development
+sudo dnf install libXt-devel gtk3-devel
 ~~~
 
 
 ### CentOS
 
 ~~~
-sudo yum install libXt-devel
+sudo yum install libXt-devel gtk3-devel
 ~~~

flatlaf-natives/flatlaf-natives-linux/build.gradle.kts

@@ -65,15 +65,37 @@ tasks {
 
 		includes.from(
 			"${javaHome}/include",
-			"${javaHome}/include/linux"
+			"${javaHome}/include/linux",
+
+			// for GTK
+			"/usr/include/gtk-3.0",
+			"/usr/include/glib-2.0",
+			if( name.contains( "X86-64" ) ) "/usr/lib/x86_64-linux-gnu/glib-2.0/include"
+									   else "/usr/lib/aarch64-linux-gnu/glib-2.0/include",
+			"/usr/include/gdk-pixbuf-2.0",
+			"/usr/include/atk-1.0",
+			"/usr/include/cairo",
+			"/usr/include/pango-1.0",
+			"/usr/include/harfbuzz",
 		)
 
 		compilerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf()
+				is Gcc, is Clang -> listOf( "-fvisibility=hidden" )
 				else -> emptyList()
 			}
 		} )
+
+		doFirst {
+			// check required Java version
+			if( JavaVersion.current() < JavaVersion.VERSION_11 ) {
+				println()
+				println( "WARNING: Java 11 or later required to build Linux native library (running ${System.getProperty( "java.version" )})" )
+				println( "         Native library built with older Java versions throw following exception when running in Java 17+:" )
+				println( "         java.lang.UnsatisfiedLinkError: .../libjawt.so: version `SUNWprivate_1.1' not found" )
+				println()
+			}
+		}
 	}
 
 	withType<LinkSharedLibrary>().configureEach {
@@ -88,7 +110,7 @@ tasks {
 
 		linkerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf( "-L${jawtPath}", "-l${jawt}" )
+				is Gcc, is Clang -> listOf( "-L${jawtPath}", "-l${jawt}", "-lgtk-3" )
 				else -> emptyList()
 			}
 		} )
@@ -128,7 +150,20 @@ tasks {
 				"-I", "${javaHome}/include/linux",
 				"-I", "$include",
 
+				// for GTK
+				"-I", "/usr/include/gtk-3.0",
+				"-I", "/usr/include/glib-2.0",
+				"-I", "/usr/lib/x86_64-linux-gnu/glib-2.0/include",
+				"-I", "/usr/include/gdk-pixbuf-2.0",
+				"-I", "/usr/include/atk-1.0",
+				"-I", "/usr/include/cairo",
+				"-I", "/usr/include/pango-1.0",
+				"-I", "/usr/include/harfbuzz",
+
 				"$src/ApiVersion.cpp",
+				"$src/GtkFileChooser.cpp",
+				"$src/GtkMessageDialog.cpp",
+				"$src/JNIUtils.cpp",
 				"$src/X11WmUtils.cpp",
 			)
 		}
@@ -152,10 +187,15 @@ tasks {
 				"-o", "$outDir/$libraryName",
 
 				"$objDir/ApiVersion.o",
+				"$objDir/GtkFileChooser.o",
+				"$objDir/GtkMessageDialog.o",
+				"$objDir/JNIUtils.o",
 				"$objDir/X11WmUtils.o",
 
+				"-lstdc++",
 				"-L${layout.projectDirectory}/lib/aarch64",
 				"-ljawt",
+				"-lgtk-3",
 			)
 
 			doLast {

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/ApiVersion.cpp

@@ -24,7 +24,7 @@
 
 // increase this version if changing API or functionality of native library
 // also update version in Java class com.formdev.flatlaf.ui.FlatNativeLinuxLibrary
-#define API_VERSION_LINUX		3001
+#define API_VERSION_LINUX		3002
 
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/GtkFileChooser.cpp

@@ -0,0 +1,277 @@
+/*
+ * 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.
+ */
+
+#include <jawt.h>
+#include <linux/jawt_md.h>
+#include <gtk/gtk.h>
+#include <gdk/gdkx.h>
+#include <glib/gi18n.h>
+#include "JNIUtils.h"
+#include "com_formdev_flatlaf_ui_FlatNativeLinuxLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+// declare external methods
+extern Window getWindowHandle( JNIEnv* env, JAWT* awt, jobject window, Display** display_return );
+
+// declare internal methods
+static jobjectArray fileListToStringArray( JNIEnv* env, GSList* fileList );
+
+//---- helper -----------------------------------------------------------------
+
+#define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_ ## option) != 0)
+#define isOptionClear( option ) ((optionsClear & com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_ ## option) != 0)
+#define isOptionSetOrClear( option ) isOptionSet( option ) || isOptionClear( option )
+
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+	jclass stringClass = env->FindClass( "java/lang/String" );
+	return env->NewObjectArray( count, stringClass, NULL );
+}
+
+static void initFilters( GtkFileChooser* chooser, JNIEnv* env, jint fileTypeIndex, jobjectArray fileTypes ) {
+	jint length = env->GetArrayLength( fileTypes );
+	if( length <= 0 )
+		return;
+
+	GtkFileFilter* filter = NULL;
+	int filterIndex = 0;
+	for( int i = 0; i < length; i++ ) {
+		jstring jstr = (jstring) env->GetObjectArrayElement( fileTypes, i );
+		if( jstr == NULL ) {
+			if( filter != NULL ) {
+				gtk_file_chooser_add_filter( chooser, filter );
+				if( fileTypeIndex == filterIndex )
+					gtk_file_chooser_set_filter( chooser, filter );
+				filter = NULL;
+				filterIndex++;
+			}
+			continue;
+		}
+
+		AutoReleaseStringUTF8 str( env, jstr );
+		if( filter == NULL ) {
+			filter = gtk_file_filter_new();
+			gtk_file_filter_set_name( filter, str );
+		} else
+			gtk_file_filter_add_pattern( filter, str );
+	}
+}
+
+static GdkWindow* getGdkWindow( JNIEnv* env, jobject window ) {
+	// get the AWT
+	JAWT awt;
+	awt.version = JAWT_VERSION_1_4;
+	if( !JAWT_GetAWT( env, &awt ) )
+		return NULL;
+
+	// get Xlib window and display from AWT window
+	Display* display;
+	Window w = getWindowHandle( env, &awt, window, &display );
+	if( w == 0 )
+		return NULL;
+
+	// based on GetAllocNativeWindowHandle() from https://github.com/btzy/nativefiledialog-extended
+	// https://github.com/btzy/nativefiledialog-extended/blob/29e3bcb578345b9fa345d1d7683f00c150565ca3/src/nfd_gtk.cpp#L384-L437
+	GdkDisplay* gdkDisplay = gdk_x11_lookup_xdisplay( display );
+	if( gdkDisplay == NULL ) {
+		// search for existing X11 display (there should only be one, even if multiple screens are connected)
+		GdkDisplayManager* displayManager = gdk_display_manager_get();
+		GSList* displays = gdk_display_manager_list_displays( displayManager );
+		for( GSList* l = displays; l; l = l->next ) {
+			if( GDK_IS_X11_DISPLAY( l->data ) ) {
+				gdkDisplay = GDK_DISPLAY( l->data );
+				break;
+			}
+		}
+		g_slist_free( displays );
+
+		// create our own X11 display
+		if( gdkDisplay == NULL ) {
+			gdk_set_allowed_backends( "x11" );
+			gdkDisplay = gdk_display_manager_open_display( displayManager, NULL );
+			gdk_set_allowed_backends( NULL );
+
+			if( gdkDisplay == NULL )
+				return NULL;
+		}
+	}
+
+	return gdk_x11_window_foreign_new_for_display( gdkDisplay, w );
+}
+
+static void handle_realize( GtkWidget* dialog, gpointer data ) {
+	GdkWindow* gdkOwner = static_cast<GdkWindow*>( data );
+
+	// make file dialog a transient of owner window,
+	// which centers file dialog on owner and keeps file dialog above owner
+	gdk_window_set_transient_for( gtk_widget_get_window( dialog ), gdkOwner );
+
+	// necessary because gdk_x11_window_foreign_new_for_display() increases the reference counter
+	g_object_unref( gdkOwner );
+}
+
+struct ResponseData {
+	JNIEnv* env;
+	jobject callback;
+	GSList* fileList;
+
+	ResponseData( JNIEnv* _env, jobject _callback ) {
+		env = _env;
+		callback = _callback;
+		fileList = NULL;
+	}
+};
+
+static void handle_response( GtkWidget* dialog, gint responseId, gpointer data ) {
+	// get filenames if user pressed OK
+	if( responseId == GTK_RESPONSE_ACCEPT ) {
+		ResponseData *response = static_cast<ResponseData*>( data );
+		if( response->callback != NULL ) {
+			GSList* fileList = gtk_file_chooser_get_filenames( GTK_FILE_CHOOSER( dialog ) );
+			jobjectArray files = fileListToStringArray( response->env, fileList );
+
+			GtkWindow* window = GTK_WINDOW( dialog );
+
+			// invoke callback: boolean approve( String[] files, long hwnd );
+			jclass cls = response->env->GetObjectClass( response->callback );
+			jmethodID approveID = response->env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+			if( approveID != NULL && !response->env->CallBooleanMethod( response->callback, approveID, files, window ) )
+				return; // keep dialog open
+		}
+
+		response->fileList = gtk_file_chooser_get_filenames( GTK_FILE_CHOOSER( dialog ) );
+	}
+
+	// hide/destroy file dialog and quit loop
+	gtk_widget_hide( dialog );
+	gtk_widget_destroy( dialog );
+	gtk_main_quit();
+}
+
+//---- JNI methods ------------------------------------------------------------
+
+extern "C"
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showFileChooser
+	( JNIEnv* env, jclass cls, jobject owner, jboolean open,
+		jstring title, jstring okButtonLabel, jstring currentName, jstring currentFolder,
+		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+{
+	// initialize GTK
+	if( !gtk_init_check( NULL, NULL ) )
+		return NULL;
+
+	// convert Java strings to C strings
+	AutoReleaseStringUTF8 ctitle( env, title );
+	AutoReleaseStringUTF8 cokButtonLabel( env, okButtonLabel );
+	AutoReleaseStringUTF8 ccurrentName( env, currentName );
+	AutoReleaseStringUTF8 ccurrentFolder( env, currentFolder );
+
+	// create GTK file chooser dialog
+	// https://docs.gtk.org/gtk3/class.FileChooserDialog.html
+	bool selectFolder = isOptionSet( FC_select_folder );
+	bool multiSelect = isOptionSet( FC_select_multiple );
+	GtkWidget* dialog = gtk_file_chooser_dialog_new(
+		(ctitle != NULL) ? ctitle
+			: (selectFolder ? (multiSelect ? _("Select Folders") : _("Select Folder"))
+				: (open ? ((multiSelect ? _("Open Files") : _("Open File"))) : _("Save File"))),
+		NULL, // can not use AWT X11 window as parent because GtkWindow is required
+		selectFolder ? GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER
+			: (open ? GTK_FILE_CHOOSER_ACTION_OPEN : GTK_FILE_CHOOSER_ACTION_SAVE),
+		_("_Cancel"), GTK_RESPONSE_CANCEL,
+		(cokButtonLabel != NULL) ? cokButtonLabel
+			: (selectFolder ? _("_Select") : (open ? _("_Open") : _("_Save"))), GTK_RESPONSE_ACCEPT,
+		NULL ); // marks end of buttons
+	GtkFileChooser* chooser = GTK_FILE_CHOOSER( dialog );
+
+	// set current name and folder
+	if( !open && ccurrentName != NULL )
+		gtk_file_chooser_set_current_name( chooser, ccurrentName );
+	if( ccurrentFolder != NULL )
+		gtk_file_chooser_set_current_folder( chooser, ccurrentFolder );
+
+	// set options
+	if( isOptionSetOrClear( FC_select_multiple ) )
+		gtk_file_chooser_set_select_multiple( chooser, isOptionSet( FC_select_multiple ) );
+	if( isOptionSetOrClear( FC_show_hidden ) )
+		gtk_file_chooser_set_show_hidden( chooser, isOptionSet( FC_show_hidden ) );
+	if( isOptionSetOrClear( FC_local_only ) )
+		gtk_file_chooser_set_local_only( chooser, isOptionSet( FC_local_only ) );
+	if( isOptionSetOrClear( FC_do_overwrite_confirmation ) )
+		gtk_file_chooser_set_do_overwrite_confirmation( chooser, isOptionSet( FC_do_overwrite_confirmation ) );
+	if( isOptionSetOrClear( FC_create_folders ) )
+		gtk_file_chooser_set_create_folders( chooser, isOptionSet( FC_create_folders ) );
+
+	// initialize filter
+	initFilters( chooser, env, fileTypeIndex, fileTypes );
+
+	// setup modality
+	GdkWindow* gdkOwner = (owner != NULL) ? getGdkWindow( env, owner ) : NULL;
+	if( gdkOwner != NULL ) {
+		gtk_window_set_modal( GTK_WINDOW( dialog ), true );
+
+		// file dialog should use same screen as owner
+		gtk_window_set_screen( GTK_WINDOW( dialog ), gdk_window_get_screen( gdkOwner ) );
+
+		// set the transient when the file dialog is realized
+		g_signal_connect( dialog, "realize", G_CALLBACK( handle_realize ), gdkOwner );
+	}
+
+	// show dialog
+	// (similar to what's done in sun_awt_X11_GtkFileDialogPeer.c)
+	ResponseData responseData( env, callback );
+	g_signal_connect( dialog, "response", G_CALLBACK( handle_response ), &responseData );
+	gtk_widget_show( dialog );
+
+	// necessary to bring file dialog to the front (and make it active)
+	// see issues:
+	//     https://github.com/btzy/nativefiledialog-extended/issues/31
+	//     https://github.com/mlabbe/nativefiledialog/pull/92
+	//     https://github.com/guillaumechereau/noc/pull/11
+	if( GDK_IS_X11_DISPLAY( gtk_widget_get_display( GTK_WIDGET( dialog ) ) ) ) {
+		GdkWindow* gdkWindow = gtk_widget_get_window( GTK_WIDGET( dialog ) );
+		gdk_window_set_events( gdkWindow, static_cast<GdkEventMask>( gdk_window_get_events( gdkWindow ) | GDK_PROPERTY_CHANGE_MASK ) );
+		gtk_window_present_with_time( GTK_WINDOW( dialog ), gdk_x11_get_server_time( gdkWindow ) );
+	}
+
+	// start event loop (will be quit in respone handler)
+	gtk_main();
+
+	// canceled?
+	if( responseData.fileList == NULL )
+		return newJavaStringArray( env, 0 );
+
+	// convert GSList to Java string array
+	return fileListToStringArray( env, responseData.fileList );
+}
+
+static jobjectArray fileListToStringArray( JNIEnv* env, GSList* fileList ) {
+	guint count = g_slist_length( fileList );
+	jobjectArray array = newJavaStringArray( env, count );
+	GSList* it = fileList;
+	for( int i = 0; i < count; i++, it = it->next ) {
+		gchar* path = (gchar*) it->data;
+		jstring jpath = env->NewStringUTF( path );
+		g_free( path );
+
+		env->SetObjectArrayElement( array, i, jpath );
+		env->DeleteLocalRef( jpath );
+	}
+	g_slist_free( fileList );
+	return array;
+}

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/GtkMessageDialog.cpp

@@ -0,0 +1,76 @@
+/*
+ * 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.
+ */
+
+#include <jawt.h>
+#include <linux/jawt_md.h>
+#include <gtk/gtk.h>
+#include <gdk/gdkx.h>
+#include <glib/gi18n.h>
+#include "JNIUtils.h"
+#include "com_formdev_flatlaf_ui_FlatNativeLinuxLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+extern "C"
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showMessageDialog
+	( JNIEnv* env, jclass cls, jlong hwndParent, jint messageType, jstring primaryText, jstring secondaryText,
+		jint defaultButton, jobjectArray buttons )
+{
+	GtkWindow* window = (GtkWindow*) hwndParent;
+
+	// convert message type
+	GtkMessageType gmessageType;
+	switch( messageType ) {
+		case /* JOptionPane.ERROR_MESSAGE */       0: gmessageType = GTK_MESSAGE_ERROR; break;
+		case /* JOptionPane.INFORMATION_MESSAGE */ 1: gmessageType = GTK_MESSAGE_INFO; break;
+		case /* JOptionPane.WARNING_MESSAGE */     2: gmessageType = GTK_MESSAGE_WARNING; break;
+		case /* JOptionPane.QUESTION_MESSAGE */    3: gmessageType = GTK_MESSAGE_QUESTION; break;
+		default:
+		case /* JOptionPane.PLAIN_MESSAGE */      -1: gmessageType = GTK_MESSAGE_OTHER; break;
+	}
+
+	// convert Java strings to C strings
+	AutoReleaseStringUTF8 cprimaryText( env, primaryText );
+	AutoReleaseStringUTF8 csecondaryText( env, secondaryText );
+
+	// create GTK file chooser dialog
+	// https://docs.gtk.org/gtk3/class.MessageDialog.html
+	jint buttonCount = env->GetArrayLength( buttons );
+	GtkWidget* dialog = gtk_message_dialog_new( window, GTK_DIALOG_MODAL, gmessageType,
+		(buttonCount > 0) ? GTK_BUTTONS_NONE : GTK_BUTTONS_OK,
+		"%s", (const gchar*) cprimaryText );
+	if( csecondaryText != NULL )
+		gtk_message_dialog_format_secondary_text( GTK_MESSAGE_DIALOG( dialog ), "%s", (const gchar*) csecondaryText );
+
+	// add buttons
+	for( int i = 0; i < buttonCount; i++ ) {
+		AutoReleaseStringUTF8 str( env, (jstring) env->GetObjectArrayElement( buttons, i ) );
+		gtk_dialog_add_button( GTK_DIALOG( dialog ), str, i );
+	}
+
+	// set default button
+	gtk_dialog_set_default_response( GTK_DIALOG( dialog ), MIN( MAX( defaultButton, 0 ), buttonCount - 1 ) );
+
+	// show message dialog
+	gint responseID = gtk_dialog_run( GTK_DIALOG( dialog ) );
+	gtk_widget_destroy( dialog );
+
+	// return -1 if closed with ESC key
+	return (responseID >= 0) ? responseID : -1;
+}

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/JNIUtils.cpp

@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include <dlfcn.h>
+#include "JNIUtils.h"
+
+/**
+ * @author Karl Tauber
+ */
+
+//---- class AutoReleaseStringUTF8 --------------------------------------------
+
+AutoReleaseStringUTF8::AutoReleaseStringUTF8( JNIEnv* _env, jstring _javaString ) {
+	env = _env;
+	javaString = _javaString;
+	chars = (javaString != NULL) ? env->GetStringUTFChars( javaString, NULL ) : NULL;
+}
+
+AutoReleaseStringUTF8::~AutoReleaseStringUTF8() {
+	if( chars != NULL )
+		env->ReleaseStringUTFChars( javaString, chars );
+}
+
+//---- JNI methods ------------------------------------------------------------
+
+extern "C"
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_isLibAvailable
+	( JNIEnv* env, jclass cls, jstring libname )
+{
+	AutoReleaseStringUTF8 clibname( env, libname );
+
+	void* lib = dlopen( clibname, RTLD_LAZY );
+	if( lib == NULL )
+		return false;
+
+	dlclose( lib );
+	return true;
+}

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/X11WmUtils.cpp

@@ -25,18 +25,21 @@
  */
 
 
-bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
-	long data0, long data1, long data2, long data3, long data4 );
-bool isWMHintSupported( Display* display, Window rootWindow, Atom atom );
+// declare exported methods
 Window getWindowHandle( JNIEnv* env, JAWT* awt, jobject window, Display** display_return );
 
+// declare internal methods
+static bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
+	long data0, long data1, long data2, long data3, long data4 );
+static bool isWMHintSupported( Display* display, Window rootWindow, Atom atom );
+
 
 //---- JNI methods ------------------------------------------------------------
 
 /**
  * Send _NET_WM_MOVERESIZE to window to initiate moving or resizing.
  *
- * https://specifications.freedesktop.org/wm-spec/wm-spec-latest.html#idm45446104441728
+ * https://specifications.freedesktop.org/wm-spec/latest/ar01s04.html#id-1.5.4
  * https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gdk/x11/gdksurface-x11.c#L3841-3881
  */
 extern "C"
@@ -79,7 +82,7 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_xS
 		0 );
 }
 
-bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
+static bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
 	long data0, long data1, long data2, long data3, long data4 )
 {
 	// get the AWT
@@ -131,7 +134,7 @@ bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
 }
 
 
-bool isWMHintSupported( Display* display, Window rootWindow, Atom atom ) {
+static bool isWMHintSupported( Display* display, Window rootWindow, Atom atom ) {
 	Atom type;
 	int format;
 	unsigned long n_atoms;

flatlaf-natives/flatlaf-natives-linux/src/main/headers/JNIUtils.h

@@ -0,0 +1,36 @@
+/*
+ * 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.
+ */
+
+#include <gtk/gtk.h>
+#include <jni.h>
+
+/**
+ * @author Karl Tauber
+ */
+
+//---- class AutoReleaseStringUTF8 --------------------------------------------
+
+class AutoReleaseStringUTF8 {
+	JNIEnv* env;
+	jstring javaString;
+	const char* chars;
+
+public:
+	AutoReleaseStringUTF8( JNIEnv* _env, jstring _javaString );
+	~AutoReleaseStringUTF8();
+
+	operator const gchar*() { return chars; }
+};

flatlaf-natives/flatlaf-natives-linux/src/main/headers/com_formdev_flatlaf_ui_FlatNativeLinuxLibrary.h

@@ -9,6 +9,18 @@ extern "C" {
 #endif
 #undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_MOVE
 #define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_MOVE 8L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_folder
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_folder 1L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_multiple
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_multiple 2L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_show_hidden
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_show_hidden 4L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_local_only
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_local_only 8L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_do_overwrite_confirmation
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_do_overwrite_confirmation 16L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_create_folders
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_create_folders 32L
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
  * Method:    xMoveOrResizeWindow
@@ -25,6 +37,30 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_xM
 JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_xShowWindowMenu
   (JNIEnv *, jclass, jobject, jint, jint);
 
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
+ * Method:    isLibAvailable
+ * Signature: (Ljava/lang/String;)Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_isLibAvailable
+  (JNIEnv *, jclass, jstring);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
+ * Method:    showFileChooser
+ * Signature: (Ljava/awt/Window;ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeLinuxLibrary/FileChooserCallback;I[Ljava/lang/String;)[Ljava/lang/String;
+ */
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showFileChooser
+  (JNIEnv *, jclass, jobject, jboolean, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
+ * Method:    showMessageDialog
+ * Signature: (JILjava/lang/String;Ljava/lang/String;I[Ljava/lang/String;)I
+ */
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showMessageDialog
+  (JNIEnv *, jclass, jlong, jint, jstring, jstring, jint, jobjectArray);
+
 #ifdef __cplusplus
 }
 #endif

flatlaf-natives/flatlaf-natives-macos/build.gradle.kts

@@ -75,7 +75,7 @@ tasks {
 
 		compilerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf( "-x", "objective-c++", "-mmacosx-version-min=$minOs" )
+				is Gcc, is Clang -> listOf( "-x", "objective-c++", "-mmacosx-version-min=$minOs", "-fvisibility=hidden" )
 				else -> emptyList()
 			}
 		} )

flatlaf-natives/flatlaf-natives-macos/src/main/headers/JNIUtils.h

@@ -46,7 +46,33 @@
 		JNI_COCOA_CATCH() \
 	}
 
+#define JNI_THREAD_ENTER( jvm, returnValue ) \
+	JNIEnv *env; \
+	bool detach = false; \
+	switch( jvm->GetEnv( (void**) &env, JNI_VERSION_1_6 ) ) { \
+		case JNI_OK: break; \
+		case JNI_EDETACHED: \
+			if( jvm->AttachCurrentThread( (void**) &env, NULL ) != JNI_OK ) \
+				return returnValue; \
+			detach = true; \
+			break; \
+		default: return returnValue; \
+	} \
+	@try {
+
+#define JNI_THREAD_EXIT( jvm ) \
+	} @finally { \
+		if( env->ExceptionCheck() ) \
+			env->ExceptionDescribe(); \
+		if( detach ) \
+			jvm->DetachCurrentThread(); \
+	}
+
 
 jclass findClass( JNIEnv *env, const char* className, bool globalRef );
 jfieldID getFieldID( JNIEnv *env, jclass cls, const char* fieldName, const char* fieldSignature, bool staticField );
 jmethodID getMethodID( JNIEnv *env, jclass cls, const char* methodName, const char* methodSignature, bool staticMethod );
+
+NSString* JavaToNSString( JNIEnv *env, jstring javaString );
+jstring NSToJavaString( JNIEnv *env, NSString *nsString );
+jstring NormalizedPathJavaFromNSString( JNIEnv* env, NSString *nsString );

flatlaf-natives/flatlaf-natives-macos/src/main/headers/com_formdev_flatlaf_ui_FlatNativeMacLibrary.h

@@ -13,6 +13,32 @@ extern "C" {
 #define com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_MEDIUM 1L
 #undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_LARGE
 #define com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_LARGE 2L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canChooseFiles
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canChooseFiles 1L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canChooseDirectories
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canChooseDirectories 2L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_resolvesAliases
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_resolvesAliases 4L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_allowsMultipleSelection
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_allowsMultipleSelection 8L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_accessoryViewDisclosed
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_accessoryViewDisclosed 16L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_showsTagField
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_showsTagField 256L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canCreateDirectories
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canCreateDirectories 512L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canSelectHiddenExtension
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_canSelectHiddenExtension 1024L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_showsHiddenFiles
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_showsHiddenFiles 2048L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_extensionHidden
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_extensionHidden 4096L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_allowsOtherFileTypes
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_allowsOtherFileTypes 8192L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_treatsFilePackagesAsDirectories
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_treatsFilePackagesAsDirectories 16384L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_showSingleFilterField
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_FC_showSingleFilterField 16777216L
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
  * Method:    setWindowRoundedBorder
@@ -53,6 +79,22 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_isWi
 JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_toggleWindowFullScreen
   (JNIEnv *, jclass, jobject);
 
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
+ * Method:    showFileChooser
+ * Signature: (Ljava/awt/Window;IZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeMacLibrary/FileChooserCallback;I[Ljava/lang/String;)[Ljava/lang/String;
+ */
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_showFileChooser
+  (JNIEnv *, jclass, jobject, jint, jboolean, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
+ * Method:    showMessageDialog
+ * Signature: (JILjava/lang/String;Ljava/lang/String;I[Ljava/lang/String;)I
+ */
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_showMessageDialog
+  (JNIEnv *, jclass, jlong, jint, jstring, jstring, jint, jobjectArray);
+
 #ifdef __cplusplus
 }
 #endif

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/ApiVersion.mm

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#include <jni.h>
-#include "com_formdev_flatlaf_ui_FlatNativeLibrary.h"
+#import <jni.h>
+#import "com_formdev_flatlaf_ui_FlatNativeLibrary.h"
 
 /**
  * @author Karl Tauber
@@ -24,7 +24,7 @@
 
 // increase this version if changing API or functionality of native library
 // also update version in Java class com.formdev.flatlaf.ui.FlatNativeMacLibrary
-#define API_VERSION_MACOS		2001
+#define API_VERSION_MACOS		2002
 
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/JNIUtils.mm

@@ -75,3 +75,38 @@ jmethodID getMethodID( JNIEnv *env, jclass cls, const char* methodName, const ch
 
 	return methodID;
 }
+
+NSString* JavaToNSString( JNIEnv *env, jstring javaString ) {
+	if( javaString == NULL )
+		return NULL;
+
+	int len = env->GetStringLength( javaString );
+	const jchar* chars = env->GetStringChars( javaString, NULL );
+	if( chars == NULL )
+		return NULL;
+
+	NSString* nsString = [NSString stringWithCharacters:(unichar*)chars length:len];
+	env->ReleaseStringChars( javaString, chars );
+	return nsString;
+}
+
+jstring NSToJavaString( JNIEnv *env, NSString *nsString ) {
+	if( nsString == NULL )
+		return NULL;
+
+	jsize len = [nsString length];
+	unichar* buffer = (unichar*) calloc( len, sizeof( unichar ) );
+	if( buffer == NULL )
+		return NULL;
+
+	[nsString getCharacters:buffer];
+	jstring javaString = env->NewString( buffer, len );
+	free( buffer );
+	return javaString;
+}
+
+jstring NormalizedPathJavaFromNSString( JNIEnv* env, NSString *nsString ) {
+	return (nsString != NULL)
+		? NSToJavaString( env, [nsString precomposedStringWithCanonicalMapping] )
+		: NULL;
+}

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/MacFileChooser.mm

@@ -0,0 +1,406 @@
+/*
+ * 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.
+ */
+
+#import <Cocoa/Cocoa.h>
+#import <objc/runtime.h>
+#import <jni.h>
+#import "JNIUtils.h"
+#import "JNFRunLoop.h"
+#import "com_formdev_flatlaf_ui_FlatNativeMacLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+// declare internal methods
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count );
+static jobjectArray urlsToStringArray( JNIEnv* env, NSArray* urls );
+static NSArray* getDialogURLs( NSSavePanel* dialog );
+
+//---- class FileChooserDelegate ----------------------------------------------
+
+@interface FileChooserDelegate : NSObject <NSOpenSavePanelDelegate, NSWindowDelegate> {
+		NSArray* _filters;
+
+		JavaVM* _jvm;
+		jobject _callback;
+		NSMutableSet* _urlsSet;
+	}
+
+	@property (nonatomic, assign) NSSavePanel* dialog;
+
+	- (void) initFilterAccessoryView: (NSMutableArray*)filters :(int)filterIndex
+		:(NSString*)filterFieldLabel :(bool)showSingleFilterField;
+	- (void) selectFormat: (id)sender;
+	- (void) selectFormatAtIndex: (int)index;
+@end
+
+@implementation FileChooserDelegate
+
+	- (void) initFilterAccessoryView: (NSMutableArray*)filters :(int)filterIndex
+		:(NSString*)filterFieldLabel :(bool)showSingleFilterField
+	{
+		_filters = filters;
+
+		// get filter names
+		NSArray* filterNames = filters.lastObject;
+		[filters removeLastObject];
+
+		// do not add filter/format combobox if there is only one filter
+		if( filters.count <= 1 && !showSingleFilterField ) {
+			[self selectFormatAtIndex:0];
+			return;
+		}
+
+		// create label
+		NSTextField* label = [[NSTextField alloc] initWithFrame:NSZeroRect];
+		label.stringValue = (filterFieldLabel != NULL) ? filterFieldLabel : @"Format:";
+		label.editable = NO;
+		label.bordered = NO;
+		label.bezeled = NO;
+		label.drawsBackground = NO;
+
+		// create combobox
+		NSPopUpButton* popupButton = [[NSPopUpButton alloc] initWithFrame:NSZeroRect pullsDown:NO];
+		[popupButton addItemsWithTitles:filterNames];
+		[popupButton selectItemAtIndex:MIN( MAX( filterIndex, 0 ), filterNames.count - 1 )];
+		[popupButton setTarget:self];
+		[popupButton setAction:@selector(selectFormat:)];
+
+		// create view
+		NSView* accessoryView = [[NSView alloc] initWithFrame:NSZeroRect];
+		[accessoryView addSubview:label];
+		[accessoryView addSubview:popupButton];
+
+		// autolayout
+		label.translatesAutoresizingMaskIntoConstraints = NO;
+		popupButton.translatesAutoresizingMaskIntoConstraints = NO;
+		int labelWidth = label.intrinsicContentSize.width;
+		int gap = 12;
+		int popupButtonWidth = popupButton.intrinsicContentSize.width;
+		int popupButtonMinimumWidth = 140;
+		int totalWidth = labelWidth + gap + MAX( popupButtonWidth, popupButtonMinimumWidth );
+		[accessoryView addConstraints:@[
+			// horizontal layout
+			[label.leadingAnchor constraintEqualToAnchor:accessoryView.centerXAnchor constant:-(totalWidth / 2)],
+			[popupButton.leadingAnchor constraintEqualToAnchor:label.trailingAnchor constant:gap],
+			[popupButton.widthAnchor constraintGreaterThanOrEqualToConstant:popupButtonMinimumWidth],
+
+			// vertical layout
+			[popupButton.topAnchor constraintEqualToAnchor:accessoryView.topAnchor constant:8],
+			[popupButton.bottomAnchor constraintEqualToAnchor:accessoryView.bottomAnchor constant:-8],
+			[label.firstBaselineAnchor constraintEqualToAnchor:popupButton.firstBaselineAnchor],
+		]];
+
+		[_dialog setAccessoryView:accessoryView];
+
+		// initial filter
+		[self selectFormatAtIndex:filterIndex];
+	}
+
+	- (void) selectFormat: (id)sender {
+		NSPopUpButton* popupButton = (NSPopUpButton*) sender;
+		[self selectFormatAtIndex:popupButton.indexOfSelectedItem];
+	}
+
+	- (void) selectFormatAtIndex: (int)index {
+		index = MIN( MAX( index, 0 ), _filters.count - 1 );
+		NSArray* fileTypes = [_filters objectAtIndex:index];
+
+		// use deprecated allowedFileTypes instead of newer allowedContentTypes (since macOS 11+)
+		// to support older macOS versions 10.14+ and because of some problems with allowedContentTypes:
+		// https://github.com/chromium/chromium/blob/d8e0032963b7ca4728ff4117933c0feb3e479b7a/components/remote_cocoa/app_shim/select_file_dialog_bridge.mm#L209-232
+		_dialog.allowedFileTypes = [fileTypes containsObject:@"*"] ? nil : fileTypes;
+	}
+
+	//---- NSOpenSavePanelDelegate ----
+
+	- (void) initCallback: (JavaVM*)jvm :(jobject)callback {
+		_jvm = jvm;
+		_callback = callback;
+	}
+
+	- (BOOL) panel: (id) sender validateURL:(NSURL*) url error:(NSError**) outError {
+		JNI_COCOA_TRY()
+
+		if( _callback == NULL )
+			return true;
+
+		NSArray* urls = getDialogURLs( sender );
+
+		// if multiple files are selected for opening, then the validateURL method
+		// is invoked for earch file, but our callback should be invoked only once for all files
+		if( urls != NULL && urls.count > 1 ) {
+			if( _urlsSet == NULL ) {
+				// invoked for first selected file --> invoke callback
+				_urlsSet = [NSMutableSet setWithArray:urls];
+				[_urlsSet removeObject:url];
+			} else {
+				// invoked for other selected files --> do not invoke callback
+				[_urlsSet removeObject:url];
+				if( _urlsSet.count == 0 )
+					_urlsSet = NULL;
+				return true;
+			}
+		}
+
+		JNI_THREAD_ENTER( _jvm, true )
+
+		jobjectArray files = urlsToStringArray( env, urls );
+		jlong window = (jlong) sender;
+
+		// invoke callback: boolean approve( String[] files, long hwnd );
+		jclass cls = env->GetObjectClass( _callback );
+		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+		if( approveID != NULL && !env->CallBooleanMethod( _callback, approveID, files, window ) ) {
+			_urlsSet = NULL;
+			return false; // keep dialog open
+		}
+
+		JNI_THREAD_EXIT( _jvm )
+		JNI_COCOA_CATCH()
+
+		return true;
+	}
+
+	//---- NSWindowDelegate ----
+
+	- (void) windowDidBecomeMain:(NSNotification *) notification {
+		JNI_COCOA_TRY()
+
+		// Disable main menu bar because the file dialog is modal and it should be not possible
+		// to select any menu item. Otherwiese an action could show a Swing dialog, which would
+		// be shown under the file dialog.
+		//
+		// NOTE: It is not necessary to re-enable the main menu bar because Swing does this itself.
+		//       When the file dialog is closed and a Swing window becomes active,
+		//       macOS sends windowDidBecomeMain (and windowDidBecomeKey) message to AWTWindow,
+		//       which invokes [self activateWindowMenuBar],
+		//       which invokes [CMenuBar activate:menuBar modallyDisabled:isDisabled],
+		//       which updates main menu bar.
+		NSMenu* mainMenu = [NSApp mainMenu];
+		int count = [mainMenu numberOfItems];
+		for( int i = 0; i < count; i++ ) {
+			NSMenuItem* menuItem = [mainMenu itemAtIndex:i];
+			NSMenu *subenu = [menuItem submenu];
+			if( [subenu isJavaMenu] )
+				[menuItem setEnabled:NO];
+		}
+
+		JNI_COCOA_CATCH()
+	}
+
+@end
+
+//---- helper -----------------------------------------------------------------
+
+#define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeMacLibrary_ ## option) != 0)
+#define isOptionClear( option ) ((optionsClear & com_formdev_flatlaf_ui_FlatNativeMacLibrary_ ## option) != 0)
+#define isOptionSetOrClear( option ) isOptionSet( option ) || isOptionClear( option )
+
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+	jclass stringClass = env->FindClass( "java/lang/String" );
+	return env->NewObjectArray( count, stringClass, NULL );
+}
+
+static NSMutableArray* initFilters( JNIEnv* env, jobjectArray fileTypes ) {
+	jint length = env->GetArrayLength( fileTypes );
+	if( length <= 0 )
+		return NULL;
+
+	NSMutableArray* filterNames = [NSMutableArray array];
+	NSMutableArray* filters = [NSMutableArray array];
+	NSString* filterName = NULL;
+	NSMutableArray* filter = NULL;
+	for( int i = 0; i < length; i++ ) {
+		jstring jstr = (jstring) env->GetObjectArrayElement( fileTypes, i );
+		if( jstr == NULL ) {
+			if( filter != NULL ) {
+				if( filter.count > 0 ) {
+					[filterNames addObject:filterName];
+					[filters addObject:filter];
+				}
+				filterName = NULL;
+				filter = NULL;
+			}
+			continue;
+		}
+
+		NSString* str = JavaToNSString( env, jstr );
+		env->DeleteLocalRef( jstr );
+		if( filter == NULL ) {
+			filterName = str;
+			filter = [NSMutableArray array];
+		} else
+			[filter addObject:str];
+	}
+
+	if( filters.count == 0 )
+		return NULL;
+
+	// add filter names to array (removed again after creating combobox)
+	[filters addObject:filterNames];
+
+	return filters;
+}
+
+//---- JNI methods ------------------------------------------------------------
+
+extern "C"
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_showFileChooser
+	( JNIEnv* env, jclass cls, jobject owner, jint dark, jboolean open,
+		jstring title, jstring prompt, jstring message, jstring filterFieldLabel,
+		jstring nameFieldLabel, jstring nameFieldStringValue, jstring directoryURL,
+		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+{
+	JNI_COCOA_ENTER()
+
+	JavaVM* jvm;
+	if( env->GetJavaVM( &jvm ) != JNI_OK )
+		return NULL;
+
+	// convert Java strings to NSString (on Java thread)
+	NSString* nsTitle = JavaToNSString( env, title );
+	NSString* nsPrompt = JavaToNSString( env, prompt );
+	NSString* nsMessage = JavaToNSString( env, message );
+	NSString* nsFilterFieldLabel = JavaToNSString( env, filterFieldLabel );
+	NSString* nsNameFieldLabel = JavaToNSString( env, nameFieldLabel );
+	NSString* nsNameFieldStringValue = JavaToNSString( env, nameFieldStringValue );
+	NSString* nsDirectoryURL = JavaToNSString( env, directoryURL );
+	NSMutableArray* filters = initFilters( env, fileTypes );
+
+	NSArray* urls = NULL;
+	NSArray** purls = &urls;
+
+	// show file dialog on macOS thread
+	[FlatJNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){
+		JNI_COCOA_TRY()
+
+		// create open/save panel
+		NSSavePanel* dialog = open ? [NSOpenPanel openPanel] : [NSSavePanel savePanel];
+
+		// set appearance
+		if( dark == 1 )
+			dialog.appearance = [NSAppearance appearanceNamed:NSAppearanceNameDarkAqua];
+		else if( dark == 0 )
+			dialog.appearance = [NSAppearance appearanceNamed:NSAppearanceNameAqua];
+
+		if( nsTitle != NULL )
+			dialog.title = nsTitle;
+		if( nsPrompt != NULL )
+			dialog.prompt = nsPrompt;
+		if( nsMessage != NULL )
+			dialog.message = nsMessage;
+		if( nsNameFieldLabel != NULL )
+			dialog.nameFieldLabel = nsNameFieldLabel;
+		if( nsNameFieldStringValue != NULL )
+			dialog.nameFieldStringValue = nsNameFieldStringValue;
+		if( nsDirectoryURL != NULL )
+			dialog.directoryURL = [NSURL fileURLWithPath:nsDirectoryURL isDirectory:YES];
+
+		// set open options
+		if( open ) {
+			NSOpenPanel* openDialog = (NSOpenPanel*) dialog;
+
+			bool canChooseFiles = isOptionSet( FC_canChooseFiles );
+			bool canChooseDirectories = isOptionSet( FC_canChooseDirectories );
+			if( !canChooseFiles && !canChooseDirectories )
+				canChooseFiles = true;
+			openDialog.canChooseFiles = canChooseFiles;
+			openDialog.canChooseDirectories = canChooseDirectories;
+
+			if( isOptionSetOrClear( FC_resolvesAliases ) )
+				openDialog.resolvesAliases = isOptionSet( FC_resolvesAliases );
+			if( isOptionSetOrClear( FC_allowsMultipleSelection ) )
+				openDialog.allowsMultipleSelection = isOptionSet( FC_allowsMultipleSelection );
+		}
+
+		// set options
+		if( isOptionSetOrClear( FC_showsTagField ) )
+			dialog.showsTagField = isOptionSet( FC_showsTagField );
+		if( isOptionSetOrClear( FC_canCreateDirectories ) )
+			dialog.canCreateDirectories = isOptionSet( FC_canCreateDirectories );
+		if( isOptionSetOrClear( FC_canSelectHiddenExtension ) )
+			dialog.canSelectHiddenExtension = isOptionSet( FC_canSelectHiddenExtension );
+		if( isOptionSetOrClear( FC_showsHiddenFiles) )
+			dialog.showsHiddenFiles = isOptionSet( FC_showsHiddenFiles);
+		if( isOptionSetOrClear( FC_extensionHidden ) )
+			dialog.extensionHidden = isOptionSet( FC_extensionHidden );
+		if( isOptionSetOrClear( FC_allowsOtherFileTypes ) )
+			dialog.allowsOtherFileTypes = isOptionSet( FC_allowsOtherFileTypes );
+		if( isOptionSetOrClear( FC_treatsFilePackagesAsDirectories ) )
+			dialog.treatsFilePackagesAsDirectories = isOptionSet( FC_treatsFilePackagesAsDirectories );
+
+		FileChooserDelegate* delegate = [FileChooserDelegate new];
+		delegate.dialog = dialog;
+
+		// initialize filter accessory view
+		if( filters != NULL ) {
+			[delegate initFilterAccessoryView:filters :fileTypeIndex :nsFilterFieldLabel :isOptionSet( FC_showSingleFilterField )];
+
+			if( open && isOptionSetOrClear( FC_accessoryViewDisclosed ) )
+				((NSOpenPanel*)dialog).accessoryViewDisclosed = isOptionSet( FC_accessoryViewDisclosed );
+		}
+
+		// initialize callback
+		if( callback != NULL )
+			[delegate initCallback :jvm :callback];
+
+		// set file dialog delegate
+		dialog.delegate = delegate;
+
+		// show dialog
+		NSModalResponse response = [dialog runModal];
+		[delegate release];
+		if( response != NSModalResponseOK ) {
+			*purls = @[];
+			return;
+		}
+
+		*purls = getDialogURLs( dialog );
+
+		JNI_COCOA_CATCH()
+	}];
+
+	if( urls == NULL )
+		return NULL;
+
+	// convert URLs to Java string array
+	return urlsToStringArray( env, urls );
+
+	JNI_COCOA_EXIT()
+}
+
+static NSArray* getDialogURLs( NSSavePanel* dialog ) {
+	if( [dialog isKindOfClass:[NSOpenPanel class]] )
+		return [[NSArray alloc] initWithArray: static_cast<NSOpenPanel*>(dialog).URLs];
+
+	NSURL* url = dialog.URL;
+	// use '[[NSArray alloc] initWithObject:url]' here because '@[url]' crashes on macOS 10.14
+	return (url != NULL) ? [[NSArray alloc] initWithObject:url] : @[];
+}
+
+static jobjectArray urlsToStringArray( JNIEnv* env, NSArray* urls ) {
+	jsize count = (urls != NULL) ? urls.count : 0;
+	jobjectArray array = newJavaStringArray( env, count );
+	for( int i = 0; i < count; i++ ) {
+		jstring filename = NormalizedPathJavaFromNSString( env, [urls[i] path] );
+		env->SetObjectArrayElement( array, i, filename );
+		env->DeleteLocalRef( filename );
+	}
+	return array;
+}

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/MacMessageDialog.mm

@@ -0,0 +1,90 @@
+/*
+ * 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.
+ */
+
+#import <Cocoa/Cocoa.h>
+#import <objc/runtime.h>
+#import <jni.h>
+#import "JNIUtils.h"
+#import "JNFRunLoop.h"
+#import "com_formdev_flatlaf_ui_FlatNativeMacLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+extern "C"
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_showMessageDialog
+	( JNIEnv* env, jclass cls, jlong hwndParent, jint alertStyle, jstring messageText, jstring informativeText,
+		jint defaultButton, jobjectArray buttons )
+{
+	JNI_COCOA_ENTER()
+
+	// convert Java strings to NSString (on Java thread)
+	NSString* nsMessageText = JavaToNSString( env, messageText );
+	NSString* nsInformativeText = JavaToNSString( env, informativeText );
+
+	jint buttonCount = env->GetArrayLength( buttons );
+	NSMutableArray* nsButtons = [NSMutableArray array];
+	for( int i = 0; i < buttonCount; i++ ) {
+		NSString* nsButton = JavaToNSString( env, (jstring) env->GetObjectArrayElement( buttons, i ) );
+		[nsButtons addObject:nsButton];
+	}
+
+	jint result = -1;
+	jint* presult = &result;
+
+	// show alert on macOS thread
+	[FlatJNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){
+		NSAlert* alert = [[NSAlert alloc] init];
+
+		// use appearance from parent window
+		NSWindow* parent = (NSWindow*) hwndParent;
+		if( parent != NULL )
+			alert.window.appearance = parent.appearance;
+
+		// use empty string because if alert.messageText is not set it displays "Alert"
+		alert.messageText = (nsMessageText != NULL) ? nsMessageText : @"";
+		if( nsInformativeText != NULL )
+			alert.informativeText = nsInformativeText;
+
+		// alert style
+		switch( alertStyle ) {
+			case /* JOptionPane.ERROR_MESSAGE */       0: alert.alertStyle = NSAlertStyleCritical; break;
+			default:
+			case /* JOptionPane.INFORMATION_MESSAGE */ 1: alert.alertStyle = NSAlertStyleInformational; break;
+			case /* JOptionPane.WARNING_MESSAGE */     2: alert.alertStyle = NSAlertStyleWarning; break;
+		}
+
+		// add buttons
+		for( int i = 0; i < nsButtons.count; i++ ) {
+			NSButton* b = [alert addButtonWithTitle:nsButtons[i]];
+			if( i == defaultButton )
+				alert.window.defaultButtonCell = b.cell;
+		}
+
+		// show alert
+		NSInteger response = [alert runModal];
+
+		// if no buttons added, which shows a single OK button, the response is 0 when clicking OK
+		// if buttons added, response is 1000+buttonIndex
+		*presult = MAX( response - NSAlertFirstButtonReturn, 0 );
+	}];
+
+	return result;
+
+	JNI_COCOA_EXIT()
+}

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/MacWindow.mm

@@ -39,13 +39,15 @@
 @implementation WindowData
 @end
 
-// declare internal methods
+// declare exported methods
 NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window );
-WindowData* getWindowData( NSWindow* nsWindow, bool allocate );
-void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden );
-int getWindowButtonAreaWidth( NSWindow* nsWindow );
-int getWindowTitleBarHeight( NSWindow* nsWindow );
-bool isWindowFullScreen( NSWindow* nsWindow );
+
+// declare internal methods
+static WindowData* getWindowData( NSWindow* nsWindow, bool allocate );
+static void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden );
+static int getWindowButtonAreaWidth( NSWindow* nsWindow );
+static int getWindowTitleBarHeight( NSWindow* nsWindow );
+static bool isWindowFullScreen( NSWindow* nsWindow );
 
 
 NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window ) {
@@ -79,7 +81,7 @@ NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window ) {
 	return (NSWindow *) jlong_to_ptr( env->GetLongField( platformWindow, ptrID ) );
 }
 
-WindowData* getWindowData( NSWindow* nsWindow, bool allocate ) {
+static WindowData* getWindowData( NSWindow* nsWindow, bool allocate ) {
 	static char key;
 	WindowData* windowData = objc_getAssociatedObject( nsWindow, &key );
 	if( windowData == NULL && allocate ) {
@@ -252,7 +254,7 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_setW
 	return FALSE;
 }
 
-void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden ) {
+static void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden ) {
 	// get buttons
 	NSView* buttons[3] = {
 		[nsWindow standardWindowButton:NSWindowCloseButton],
@@ -312,7 +314,7 @@ JNIEXPORT jobject JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_getWi
 	return NULL;
 }
 
-int getWindowButtonAreaWidth( NSWindow* nsWindow ) {
+static int getWindowButtonAreaWidth( NSWindow* nsWindow ) {
 	// get buttons
 	NSView* buttons[3] = {
 		[nsWindow standardWindowButton:NSWindowCloseButton],
@@ -344,7 +346,7 @@ int getWindowButtonAreaWidth( NSWindow* nsWindow ) {
 	return right + left;
 }
 
-int getWindowTitleBarHeight( NSWindow* nsWindow ) {
+static int getWindowTitleBarHeight( NSWindow* nsWindow ) {
 	NSView* closeButton = [nsWindow standardWindowButton:NSWindowCloseButton];
 	if( closeButton == NULL )
 		return -1;
@@ -369,7 +371,7 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_isWi
 	return FALSE;
 }
 
-bool isWindowFullScreen( NSWindow* nsWindow ) {
+static bool isWindowFullScreen( NSWindow* nsWindow ) {
 	return ((nsWindow.styleMask & NSWindowStyleMaskFullScreen) != 0);
 }
 

flatlaf-natives/flatlaf-natives-windows/build.gradle.kts

@@ -64,7 +64,7 @@ tasks {
 		compilerArgs.addAll( toolChain.map {
 			when( it ) {
 				is Gcc, is Clang -> listOf( "-O2", "-DUNICODE" )
-				is VisualCpp -> listOf( "/O2", "/Zl", "/GS-", "/DUNICODE" )
+				is VisualCpp -> listOf( "/O2", "/GS-", "/DUNICODE" )
 				else -> emptyList()
 			}
 		} )
@@ -80,8 +80,8 @@ tasks {
 
 		linkerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf( "-lUser32", "-lGdi32", "-lshell32", "-lAdvAPI32", "-lKernel32", "-lDwmapi" )
-				is VisualCpp -> listOf( "User32.lib", "Gdi32.lib", "shell32.lib", "AdvAPI32.lib", "Kernel32.lib", "Dwmapi.lib", "/NODEFAULTLIB" )
+				is Gcc, is Clang -> listOf( "-lUser32", "-lGdi32", "-lshell32", "-lAdvAPI32", "-lKernel32", "-lDwmapi", "-lOle32", "-luuid" )
+				is VisualCpp -> listOf( "User32.lib", "Gdi32.lib", "shell32.lib", "AdvAPI32.lib", "Kernel32.lib", "Dwmapi.lib", "Ole32.lib", "uuid.lib" )
 				else -> emptyList()
 			}
 		} )
@@ -93,6 +93,15 @@ tasks {
 				into( nativesDir )
 				rename( linkedFile.get().asFile.name, libraryName )
 			}
+
+/*dump
+			val dumpbin = "C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.42.34433/bin/Hostx64/x64/dumpbin.exe"
+			val dll = linkedFile.asFile.get()
+			val dllDir = dll.parent
+			exec { commandLine( dumpbin, "/all", "/rawdata:none", "/out:$dllDir/objdump.txt", dll ) }
+			exec { commandLine( dumpbin, "/all", "/out:$dllDir/full-contents.txt", dll ) }
+			exec { commandLine( dumpbin, "/disasm", "/out:$dllDir/disassemble.txt", dll ) }
+dump*/
 		}
 	}
 }

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/ApiVersion.cpp

@@ -24,7 +24,7 @@
 
 // increase this version if changing API or functionality of native library
 // also update version in Java class com.formdev.flatlaf.ui.FlatNativeWindowsLibrary
-#define API_VERSION_WINDOWS		1001
+#define API_VERSION_WINDOWS		1002
 
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/FlatWndProc.cpp

@@ -30,6 +30,7 @@
  * @author Karl Tauber
  */
 
+// declare exported methods
 HWND getWindowHandle( JNIEnv* env, jobject window );
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/JNIUtils.cpp

@@ -0,0 +1,67 @@
+/*
+ * 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.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include "JNIUtils.h"
+
+/**
+ * @author Karl Tauber
+ */
+
+//---- class AutoReleaseString ------------------------------------------------
+
+AutoReleaseString::AutoReleaseString( JNIEnv* _env, jstring _javaString ) {
+	env = _env;
+	javaString = _javaString;
+	chars = (javaString != NULL) ? env->GetStringChars( javaString, NULL ) : NULL;
+}
+
+AutoReleaseString::~AutoReleaseString() {
+	if( chars != NULL )
+		env->ReleaseStringChars( javaString, chars );
+}
+
+//---- class AutoReleaseStringArray -------------------------------------------
+
+AutoReleaseStringArray::AutoReleaseStringArray( JNIEnv* _env, jobjectArray _javaStringArray ) {
+	env = _env;
+	count = (_javaStringArray != NULL) ? env->GetArrayLength( _javaStringArray ) : 0;
+	if( count <= 0 )
+		return;
+
+	javaStringArray = new jstring[count];
+	charsArray = new const jchar*[count];
+
+	for( int i = 0; i < count; i++ ) {
+		javaStringArray[i] = (jstring) env->GetObjectArrayElement( _javaStringArray, i );
+		charsArray[i] = env->GetStringChars( javaStringArray[i] , NULL );
+	}
+}
+
+AutoReleaseStringArray::~AutoReleaseStringArray() {
+	if( count == 0 )
+		return;
+
+	for( int i = 0; i < count; i++ ) {
+		env->ReleaseStringChars( javaStringArray[i], charsArray[i] );
+		env->DeleteLocalRef( javaStringArray[i] );
+	}
+
+	delete[] javaStringArray;
+	delete[] charsArray;
+}

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/Runtime.cpp

@@ -36,8 +36,11 @@
  * @author Karl Tauber
  */
 
+HINSTANCE _instance;
+
 extern "C"
 BOOL WINAPI _DllMainCRTStartup( HINSTANCE instance, DWORD reason, LPVOID reserved ) {
+	_instance = instance;
 	return TRUE;
 }
 

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/WinFileChooser.cpp

@@ -0,0 +1,333 @@
+/*
+ * 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.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include <windows.h>
+#include <shobjidl.h>
+#include "JNIUtils.h"
+#include "com_formdev_flatlaf_ui_FlatNativeWindowsLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+// declare external methods
+extern HWND getWindowHandle( JNIEnv* env, jobject window );
+
+// declare internal methods
+static jobjectArray getFiles( JNIEnv* env, jboolean open, IFileDialog* dialog );
+
+//---- class AutoReleasePtr ---------------------------------------------------
+
+template<class T> class AutoReleasePtr {
+	T* ptr;
+
+public:
+	AutoReleasePtr() {
+		ptr = NULL;
+	}
+	AutoReleasePtr( T* p ) {
+		ptr = p;
+		ptr->AddRef();
+	}
+	~AutoReleasePtr() {
+		if( ptr != NULL )
+			ptr->Release();
+	}
+	T** operator&() { return &ptr; }
+	T* operator->() { return ptr; }
+	operator T*() { return ptr; }
+};
+
+//---- class AutoReleaseIShellItem --------------------------------------------
+
+class AutoReleaseIShellItem : public AutoReleasePtr<IShellItem> {
+public:
+	AutoReleaseIShellItem( JNIEnv* env, jstring path ) {
+		AutoReleaseString cpath( env, path );
+		::SHCreateItemFromParsingName( cpath, NULL, IID_IShellItem, reinterpret_cast<void**>( &*this ) );
+	}
+};
+
+//---- class FilterSpec -------------------------------------------------------
+
+class FilterSpec {
+	AutoReleaseStringArray fileTypes;
+
+public:
+	UINT count = 0;
+	COMDLG_FILTERSPEC* specs = NULL;
+
+public:
+	FilterSpec( JNIEnv* _env, jobjectArray _fileTypes )
+		: fileTypes( _env, _fileTypes )
+	{
+		if( fileTypes.count == 0 )
+			return;
+
+		count = fileTypes.count / 2;
+		specs = new COMDLG_FILTERSPEC[fileTypes.count];
+
+		for( int i = 0; i < count; i++ ) {
+			specs[i].pszName = fileTypes[i * 2];
+			specs[i].pszSpec = fileTypes[(i * 2) + 1];
+		}
+	}
+	~FilterSpec() {
+		if( specs != NULL )
+			delete[] specs;
+	}
+};
+
+//---- class DialogEventHandler -----------------------------------------------
+
+// see https://github.com/microsoft/Windows-classic-samples/blob/main/Samples/Win7Samples/winui/shell/appplatform/commonfiledialog/CommonFileDialogApp.cpp
+
+class DialogEventHandler : public IFileDialogEvents {
+	JNIEnv* env;
+	jboolean open;
+	jobject callback;
+	LONG refCount = 1;
+
+public:
+	DialogEventHandler( JNIEnv* _env, jboolean _open, jobject _callback ) {
+		env = _env;
+		open = _open;
+		callback = _callback;
+	}
+
+	//---- IFileDialogEvents methods ----
+
+	IFACEMETHODIMP OnFileOk( IFileDialog* dialog ) {
+		if( callback == NULL )
+			return S_OK;
+
+		// get files
+		jobjectArray files;
+		if( open ) {
+			AutoReleasePtr<IFileOpenDialog> openDialog;
+			HRESULT hr = dialog->QueryInterface( &openDialog );
+			files = SUCCEEDED( hr ) ? getFiles( env, true, openDialog ) : getFiles( env, false, dialog );
+		} else
+			files = getFiles( env, false, dialog );
+
+		// get hwnd of file dialog
+		HWND hwndFileDialog = 0;
+		AutoReleasePtr<IOleWindow> window;
+		if( SUCCEEDED( dialog->QueryInterface( &window ) ) )
+			window->GetWindow( &hwndFileDialog );
+
+		// invoke callback: boolean approve( String[] files, long hwnd );
+		jclass cls = env->GetObjectClass( callback );
+		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+		if( approveID == NULL )
+			return S_OK;
+		return env->CallBooleanMethod( callback, approveID, files, hwndFileDialog ) ? S_OK : S_FALSE;
+	}
+
+	IFACEMETHODIMP OnFolderChange( IFileDialog* ) { return S_OK; }
+	IFACEMETHODIMP OnFolderChanging( IFileDialog*, IShellItem* ) { return S_OK; }
+	IFACEMETHODIMP OnHelp( IFileDialog* ) { return S_OK; }
+	IFACEMETHODIMP OnSelectionChange( IFileDialog* ) { return S_OK; }
+	IFACEMETHODIMP OnShareViolation( IFileDialog*, IShellItem*, FDE_SHAREVIOLATION_RESPONSE* ) { return S_OK; }
+	IFACEMETHODIMP OnTypeChange( IFileDialog*pfd ) { return S_OK; }
+	IFACEMETHODIMP OnOverwrite( IFileDialog*, IShellItem*, FDE_OVERWRITE_RESPONSE* ) { return S_OK; }
+
+	//---- IUnknown methods ----
+
+	IFACEMETHODIMP QueryInterface( REFIID riid, void** ppv ) {
+		if( riid != IID_IFileDialogEvents && riid != IID_IUnknown )
+			return E_NOINTERFACE;
+
+		*ppv = static_cast<IFileDialogEvents*>( this );
+		AddRef();
+		return S_OK;
+	}
+
+	IFACEMETHODIMP_(ULONG) AddRef() {
+		return InterlockedIncrement( &refCount );
+	}
+
+	IFACEMETHODIMP_(ULONG) Release() {
+		LONG newRefCount = InterlockedDecrement( &refCount );
+		if( newRefCount == 0 )
+			delete this;
+		return newRefCount;
+	}
+
+private:
+	~DialogEventHandler() {}
+};
+
+//---- class CoInitializer ----------------------------------------------------
+
+class CoInitializer {
+public:
+	bool initialized;
+
+	CoInitializer() {
+		HRESULT result = ::CoInitializeEx( NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE );
+		initialized = SUCCEEDED( result );
+	}
+	~CoInitializer() {
+		if( initialized )
+			::CoUninitialize();
+	}
+};
+
+//---- helper -----------------------------------------------------------------
+
+#define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_ ## option) != 0)
+#define CHECK_HRESULT( code ) { if( (code) != S_OK ) return NULL; }
+
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+	jclass stringClass = env->FindClass( "java/lang/String" );
+	return env->NewObjectArray( count, stringClass, NULL );
+}
+
+static jstring newJavaString( JNIEnv* env, LPWSTR str ) {
+	return env->NewString( reinterpret_cast<jchar*>( str ), static_cast<jsize>( wcslen( str ) ) );
+}
+
+//---- JNI methods ------------------------------------------------------------
+
+extern "C"
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showFileChooser
+	( JNIEnv* env, jclass cls, jobject owner, jboolean open,
+		jstring title, jstring okButtonLabel, jstring fileNameLabel, jstring fileName,
+		jstring folder, jstring saveAsItem, jstring defaultFolder, jstring defaultExtension,
+		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+{
+	// initialize COM library
+	CoInitializer coInitializer;
+	if( !coInitializer.initialized )
+		return NULL;
+
+	// handle limitations (without this, some Win32 method fails and this method returns NULL)
+	if( isOptionSet( FOS_PICKFOLDERS ) ) {
+		open = true; // always use IFileOpenDialog for picking folders
+		fileTypes = NULL; // no filter allowed for picking folders
+	}
+	if( !open && isOptionSet( FOS_ALLOWMULTISELECT ) )
+		optionsSet &= ~FOS_ALLOWMULTISELECT;
+
+	// convert Java strings to C strings
+	AutoReleaseString ctitle( env, title );
+	AutoReleaseString cokButtonLabel( env, okButtonLabel );
+	AutoReleaseString cfileNameLabel( env, fileNameLabel );
+	AutoReleaseString cfileName( env, fileName );
+	AutoReleaseIShellItem cfolder( env, folder );
+	AutoReleaseIShellItem csaveAsItem( env, saveAsItem );
+	AutoReleaseIShellItem cdefaultFolder( env, defaultFolder );
+	AutoReleaseString cdefaultExtension( env, defaultExtension );
+	FilterSpec specs( env, fileTypes );
+
+	// create IFileOpenDialog or IFileSaveDialog
+	// https://learn.microsoft.com/en-us/windows/win32/shell/common-file-dialog
+	AutoReleasePtr<IFileDialog> dialog;
+	CHECK_HRESULT( ::CoCreateInstance( open ? CLSID_FileOpenDialog : CLSID_FileSaveDialog,
+		NULL, CLSCTX_INPROC_SERVER, open ? IID_IFileOpenDialog : IID_IFileSaveDialog,
+		reinterpret_cast<LPVOID*>( &dialog ) ) );
+
+	// set title, etc.
+	if( ctitle != NULL )
+		CHECK_HRESULT( dialog->SetTitle( ctitle ) );
+	if( cokButtonLabel != NULL )
+		CHECK_HRESULT( dialog->SetOkButtonLabel( cokButtonLabel ) );
+	if( cfileNameLabel != NULL )
+		CHECK_HRESULT( dialog->SetFileNameLabel( cfileNameLabel ) );
+	if( cfileName != NULL )
+		CHECK_HRESULT( dialog->SetFileName( cfileName ) );
+	if( cfolder != NULL )
+		CHECK_HRESULT( dialog->SetFolder( cfolder ) );
+	if( !open && csaveAsItem != NULL )
+		CHECK_HRESULT( ((IFileSaveDialog*)(IFileDialog*)dialog)->SetSaveAsItem( csaveAsItem ) );
+	if( cdefaultFolder != NULL )
+		CHECK_HRESULT( dialog->SetDefaultFolder( cdefaultFolder ) );
+	if( cdefaultExtension != NULL )
+		CHECK_HRESULT( dialog->SetDefaultExtension( cdefaultExtension ) );
+
+	// set options
+	FILEOPENDIALOGOPTIONS existingOptions;
+	CHECK_HRESULT( dialog->GetOptions( &existingOptions ) );
+	CHECK_HRESULT( dialog->SetOptions ( (existingOptions & ~optionsClear) | optionsSet ) );
+
+	// initialize filter
+	if( specs.count > 0 ) {
+		CHECK_HRESULT( dialog->SetFileTypes( specs.count, specs.specs ) );
+		if( fileTypeIndex > 0 )
+			CHECK_HRESULT( dialog->SetFileTypeIndex( min( fileTypeIndex + 1, specs.count ) ) );
+	}
+
+	// add event handler
+	AutoReleasePtr<DialogEventHandler> handler( new DialogEventHandler( env, open, callback ) );
+	DWORD dwCookie = 0;
+	CHECK_HRESULT( dialog->Advise( handler, &dwCookie ) );
+
+	// show dialog
+	HWND hwndOwner = (owner != NULL) ? getWindowHandle( env, owner ) : NULL;
+	HRESULT hr = dialog->Show( hwndOwner );
+	dialog->Unadvise( dwCookie );
+	if( hr == HRESULT_FROM_WIN32(ERROR_CANCELLED) )
+		return newJavaStringArray( env, 0 );
+	CHECK_HRESULT( hr );
+
+	// get selected files as Java string array
+	return getFiles( env, open, dialog );
+}
+
+static jobjectArray getFiles( JNIEnv* env, jboolean open, IFileDialog* dialog ) {
+	if( open ) {
+		AutoReleasePtr<IShellItemArray> shellItems;
+		DWORD count;
+		CHECK_HRESULT( ((IFileOpenDialog*)(IFileDialog*)dialog)->GetResults( &shellItems ) );
+		CHECK_HRESULT( shellItems->GetCount( &count ) );
+
+		// convert shell items to Java string array
+		jobjectArray array = newJavaStringArray( env, count );
+		for( int i = 0; i < count; i++ ) {
+			AutoReleasePtr<IShellItem> shellItem;
+			LPWSTR path;
+			CHECK_HRESULT( shellItems->GetItemAt( i, &shellItem ) );
+			CHECK_HRESULT( shellItem->GetDisplayName( SIGDN_FILESYSPATH, &path ) );
+
+			jstring jpath = newJavaString( env, path );
+			CoTaskMemFree( path );
+
+			env->SetObjectArrayElement( array, i, jpath );
+			env->DeleteLocalRef( jpath );
+		}
+		return array;
+	} else {
+		AutoReleasePtr<IShellItem> shellItem;
+		LPWSTR path;
+		CHECK_HRESULT( dialog->GetResult( &shellItem ) );
+		CHECK_HRESULT( shellItem->GetDisplayName( SIGDN_FILESYSPATH, &path ) );
+
+		// convert shell item to Java string array
+		jstring jpath = newJavaString( env, path );
+		CoTaskMemFree( path );
+
+		jobjectArray array = newJavaStringArray( env, 1 );
+		env->SetObjectArrayElement( array, 0, jpath );
+		env->DeleteLocalRef( jpath );
+
+		return array;
+	}
+}

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/WinMessageDialog.cpp

@@ -0,0 +1,419 @@
+/*
+ * 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.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include <windows.h>
+#include <stdio.h>
+#include "JNIUtils.h"
+#include "com_formdev_flatlaf_ui_FlatNativeWindowsLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+#define ID_BUTTON1		101
+
+// declare external fields
+extern HINSTANCE _instance;
+
+// declare internal methods
+static byte* createInMemoryTemplate( HWND owner, int messageType, LPCWSTR title, LPCWSTR text,
+	int defaultButton, int buttonCount, LPCWSTR* buttons );
+static INT_PTR CALLBACK messageDialogProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
+static int textLengthAsDLUs( HDC hdc, LPCWSTR str, int strLen );
+static LONG pixel2dluX( LONG px );
+static LONG pixel2dluY( LONG px );
+static LONG dluX2pixel( LONG dluX );
+static LPWORD lpwAlign( LPWORD lpIn );
+
+
+extern "C"
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageBox
+	( JNIEnv* env, jclass cls, jlong hwndParent, jstring text, jstring caption, jint type )
+{
+	// convert Java strings to C strings
+	AutoReleaseString ctext( env, text );
+	AutoReleaseString ccaption( env, caption );
+
+	return ::MessageBox( reinterpret_cast<HWND>( hwndParent ), ctext, ccaption, type );
+}
+
+extern "C"
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageDialog
+	( JNIEnv* env, jclass cls, jlong hwndParent, jint messageType, jstring title,
+		jstring text, jint defaultButton, jobjectArray buttons )
+{
+	HWND owner = reinterpret_cast<HWND>( hwndParent );
+
+	// convert Java strings to C strings
+	AutoReleaseString ctitle( env, title );
+	AutoReleaseString ctext( env, text );
+	AutoReleaseStringArray cbuttons( env, buttons );
+
+	// get title from parent window if necessary
+	WCHAR parentTitle[100];
+	if( ctitle == NULL )
+		::GetWindowText( owner, parentTitle, 100 );
+
+	byte* templ = createInMemoryTemplate( owner, messageType, (ctitle != NULL) ? ctitle : parentTitle,
+		ctext, defaultButton, cbuttons.count, cbuttons );
+	if( templ == NULL )
+		return -1;
+
+	LRESULT ret = ::DialogBoxIndirect( _instance, (LPDLGTEMPLATE) templ, owner, messageDialogProc );
+	delete templ;
+	return (ret >= ID_BUTTON1) ? ret - ID_BUTTON1 : -1;
+}
+
+
+// all values in DLUs
+
+#define INSETS_TOP				12
+#define INSETS_LEFT				12
+#define INSETS_RIGHT			12
+#define INSETS_BOTTOM			6
+
+#define ICON_TEXT_GAP			8
+
+#define LABEL_MIN_WIDTH			100
+#define LABEL_MAX_WIDTH			250
+#define LABEL_HEIGHT			8
+
+#define BUTTON_WIDTH			50
+#define BUTTON_HEIGHT			12
+#define BUTTON_GAP				5
+#define BUTTON_TOP_GAP			14
+#define BUTTON_LEFT_RIGHT_GAP	8
+
+// based on https://learn.microsoft.com/en-us/windows/win32/dlgbox/using-dialog-boxes#creating-a-template-in-memory
+static byte* createInMemoryTemplate( HWND owner, int messageType, LPCWSTR title, LPCWSTR text,
+	int defaultButton, int buttonCount, LPCWSTR* buttons )
+{
+	// get font info needed for DS_SETFONT
+	NONCLIENTMETRICS ncMetrics;
+	ncMetrics.cbSize = sizeof( NONCLIENTMETRICS );
+	if( !::SystemParametersInfo( SPI_GETNONCLIENTMETRICS, 0, &ncMetrics, 0 ) )
+		return NULL;
+
+	// create DC to use message font
+	HDC hdcOwner = ::GetDC( owner );
+	HDC hdc = ::CreateCompatibleDC( hdcOwner );
+	::ReleaseDC( owner, hdcOwner );
+	if( hdc == NULL )
+		return NULL;
+
+	HFONT hfont = ::CreateFontIndirect( &ncMetrics.lfMessageFont );
+	if( hfont == NULL ) {
+		::DeleteDC( hdc );
+		return NULL;
+	}
+
+	if( ::SelectObject( hdc, hfont ) == NULL ) {
+		::DeleteDC( hdc );
+		::DeleteObject( hfont );
+		return NULL;
+	}
+
+	//---- calculate layout (in DLUs) ----
+
+	// layout icon
+	LPWSTR icon;
+	switch( messageType ) {
+		case /* JOptionPane.ERROR_MESSAGE */       0: icon = IDI_ERROR; break;
+		case /* JOptionPane.INFORMATION_MESSAGE */ 1: icon = IDI_INFORMATION; break;
+		case /* JOptionPane.WARNING_MESSAGE */     2: icon = IDI_WARNING; break;
+		case /* JOptionPane.QUESTION_MESSAGE */    3: icon = IDI_QUESTION; break;
+		default:
+		case /* JOptionPane.PLAIN_MESSAGE */      -1: icon = NULL; break;
+	}
+	int ix = INSETS_LEFT;
+	int iy = INSETS_TOP;
+	int iw = pixel2dluX( ::GetSystemMetrics( SM_CXICON ) );
+	int ih = pixel2dluY( ::GetSystemMetrics( SM_CYICON ) );
+
+	// layout text
+	int tx = ix + (icon != NULL ? iw + ICON_TEXT_GAP : 0);
+	int ty = iy;
+	int tw = 0;
+	int th = 0;
+	if( text == NULL )
+		text = L"";
+	LPWSTR wrappedText = new WCHAR[wcslen( text ) + 1];
+	wcscpy( wrappedText, text );
+	LPWSTR lineStart = wrappedText;
+	for( LPWSTR t = wrappedText; ; t++ ) {
+		if( *t != '\n' && *t != 0 )
+			continue;
+
+		// calculate line width (in pixels) and number of charaters that fit into LABEL_MAX_WIDTH
+		int lineLen = t - lineStart;
+		int fit = 0;
+		SIZE size{ 0 };
+		if( !::GetTextExtentExPoint( hdc, lineStart, lineLen, dluX2pixel( LABEL_MAX_WIDTH ), &fit, NULL, &size ) )
+			break;
+
+		if( fit < lineLen ) {
+			// wrap too long line --> try to wrap at space character
+			bool wrapped = false;
+			for( LPWSTR t2 = lineStart + fit - 1; t2 > lineStart; t2-- ) {
+				if( *t2 == ' ' || *t2 == '\t' ) {
+					*t2 = '\n';
+					int w = textLengthAsDLUs( hdc, lineStart, t2 - lineStart );
+					tw = max( tw, w );
+					th += LABEL_HEIGHT;
+
+					// continue wrapping after inserted line break
+					t = t2;
+					lineStart = t + 1;
+					wrapped = true;
+					break;
+				}
+			}
+			if( !wrapped ) {
+				// not able to wrap at word --> break long word
+				int breakIndex = (lineStart + fit) - wrappedText;
+				int w = textLengthAsDLUs( hdc, lineStart, breakIndex );
+				tw = max( tw, w );
+				th += LABEL_HEIGHT;
+
+				// duplicate string
+				LPWSTR wrappedText2 = new WCHAR[wcslen( wrappedText ) + 1 + 1];
+				// use wcscpy(), instead of wcsncpy(), because this method is inlined and does not require linking to runtime lib
+				wcscpy( wrappedText2, wrappedText );
+				wrappedText2[breakIndex] = '\n';
+				wcscpy( wrappedText2 + breakIndex + 1, wrappedText + breakIndex );
+
+				// delete old text
+				delete[] wrappedText;
+				wrappedText = wrappedText2;
+
+				// continue wrapping after inserted line break
+				t = wrappedText + breakIndex;
+				lineStart = t + 1;
+			}
+		} else {
+			// line fits into LABEL_MAX_WIDTH
+			int w = pixel2dluX( size.cx );
+			tw = max( tw, w );
+			th += LABEL_HEIGHT;
+			lineStart = t + 1;
+		}
+
+		if( *t == 0 )
+			break;
+	}
+	tw = min( max( tw, LABEL_MIN_WIDTH ), LABEL_MAX_WIDTH );
+	th = max( th, LABEL_HEIGHT );
+	if( icon != NULL && th < ih )
+		ty += (ih - th) / 2; // vertically center text
+
+	// layout buttons
+	int* bw = new int[buttonCount];
+	int buttonTotalWidth = BUTTON_GAP * (buttonCount - 1);
+	for( int i = 0; i < buttonCount; i++ ) {
+		int w = textLengthAsDLUs( hdc, buttons[i], -1 ) + 16;
+		bw[i] = max( BUTTON_WIDTH, w );
+		buttonTotalWidth += bw[i];
+	}
+
+	// layout dialog
+	int dx = 0;
+	int dy = 0;
+	int dw = max( tx + tw + INSETS_RIGHT, BUTTON_LEFT_RIGHT_GAP + buttonTotalWidth + BUTTON_LEFT_RIGHT_GAP );
+	int dh = max( iy + ih, ty + th ) + BUTTON_TOP_GAP + BUTTON_HEIGHT + INSETS_BOTTOM;
+
+	// center dialog in owner
+	RECT ownerRect{ 0 };
+	if( ::GetClientRect( owner, &ownerRect ) ) {
+		dx = (pixel2dluX( ownerRect.right - ownerRect.left ) - dw) / 2;
+		dy = (pixel2dluY( ownerRect.bottom - ownerRect.top ) - dh) / 2;
+	}
+
+	// layout button area
+	int bx = dw - buttonTotalWidth - BUTTON_LEFT_RIGHT_GAP;
+	int by = dh - BUTTON_HEIGHT - INSETS_BOTTOM;
+
+	// get font info needed for DS_SETFONT
+	int fontPointSize = (ncMetrics.lfMessageFont.lfHeight < 0)
+		? -MulDiv( ncMetrics.lfMessageFont.lfHeight, 72, ::GetDeviceCaps( hdc, LOGPIXELSY ) )
+		: ncMetrics.lfMessageFont.lfHeight;
+	LPCWSTR fontFaceName = ncMetrics.lfMessageFont.lfFaceName;
+
+	// delete DC and font
+	::DeleteDC( hdc );
+	::DeleteObject( hfont );
+
+	// (approximately) calculate memory size needed for in-memory template
+	int templSize = (sizeof(DLGTEMPLATE) + /*menu*/ 2 + /*class*/ 2 + /*title*/ 2)
+		+ ((sizeof(DLGITEMTEMPLATE) + /*class*/ 4 + /*title/icon*/ 4 + /*creation data*/ 2) * (/*icon+text*/2 + buttonCount))
+		+ (title != NULL ? (wcslen( title ) + 1) * sizeof(wchar_t) : 0)
+		+ /*fontPointSize*/ 2 + ((wcslen( fontFaceName ) + 1) * sizeof(wchar_t))
+		+ ((wcslen( wrappedText ) + 1) * sizeof(wchar_t));
+	for( int i = 0; i < buttonCount; i++ )
+		templSize += ((wcslen( buttons[i] ) + 1) * sizeof(wchar_t));
+
+	templSize += (2 * (1 + 1 + buttonCount)); // necessary for DWORD alignment
+	templSize += 100; // some reserve
+
+	// allocate memory for in-memory template
+	byte* templ = new byte[templSize];
+	if( templ == NULL )
+		return NULL;
+
+
+	//---- define dialog box ----
+
+	LPDLGTEMPLATE lpdt = (LPDLGTEMPLATE) templ;
+	lpdt->style = WS_POPUP | WS_BORDER | WS_SYSMENU | DS_MODALFRAME | WS_CAPTION | DS_SETFONT;
+	lpdt->cdit = /*text*/ 1 + buttonCount; // number of controls
+	lpdt->x = dx;
+	lpdt->y = dy;
+	lpdt->cx = dw;
+	lpdt->cy = dh;
+
+	LPWORD lpw = (LPWORD) (lpdt + 1);
+	*lpw++ = 0; // no menu
+	*lpw++ = 0; // predefined dialog box class (by default)
+	if( title != NULL ) {
+		wcscpy( (LPWSTR) lpw, title );
+		lpw += wcslen( title ) + 1;
+	} else
+		*lpw++ = 0; // no title
+
+	// for DS_SETFONT
+	*lpw++ = fontPointSize;
+	wcscpy( (LPWSTR) lpw, fontFaceName );
+	lpw += wcslen( fontFaceName ) + 1;
+
+	//---- define icon ----
+
+	if( icon != NULL ) {
+		lpdt->cdit++;
+
+		lpw = lpwAlign( lpw );
+		LPDLGITEMTEMPLATE lpdit = (LPDLGITEMTEMPLATE) lpw;
+		lpdit->x = ix;
+		lpdit->y = iy;
+		lpdit->cx = iw;
+		lpdit->cy = ih;
+		lpdit->id = ID_BUTTON1 - 1;
+		lpdit->style = WS_CHILD | WS_VISIBLE | SS_ICON;
+
+		lpw = (LPWORD) (lpdit + 1);
+		*lpw++ = 0xffff; *lpw++ = 0x0082;		// Static class
+		*lpw++ = 0xffff; *lpw++ = (WORD) icon;	// icon
+		*lpw++ = 0;								// creation data
+	}
+
+
+	//---- define text ----
+
+	lpw = lpwAlign( lpw );
+	LPDLGITEMTEMPLATE lpdit = (LPDLGITEMTEMPLATE) lpw;
+	lpdit->x = tx;
+	lpdit->y = ty;
+	lpdit->cx = tw;
+	lpdit->cy = th;
+	lpdit->id = ID_BUTTON1 - 2;
+	lpdit->style = WS_CHILD | WS_VISIBLE | SS_LEFT | SS_NOPREFIX | SS_EDITCONTROL;
+
+	lpw = (LPWORD) (lpdit + 1);
+	*lpw++ = 0xffff; *lpw++ = 0x0082;										// Static class
+	wcscpy( (LPWSTR) lpw, wrappedText ); lpw += wcslen( wrappedText ) + 1;	// text
+	*lpw++ = 0;																// creation data
+
+
+	//---- define buttons ----
+
+	defaultButton = min( max( defaultButton, 0 ), buttonCount - 1 );
+	int buttonId = ID_BUTTON1;
+	for( int i = 0; i < buttonCount; i++ ) {
+		lpw = lpwAlign( lpw );
+		LPDLGITEMTEMPLATE lpdit = (LPDLGITEMTEMPLATE) lpw;
+		lpdit->x = bx;
+		lpdit->y = by;
+		lpdit->cx = bw[i];
+		lpdit->cy = BUTTON_HEIGHT;
+		lpdit->id = buttonId++;
+		lpdit->style = WS_CHILD | WS_VISIBLE | WS_TABSTOP | (i == 0 ? WS_GROUP : 0)
+			| BS_TEXT | (i == defaultButton ? BS_DEFPUSHBUTTON : BS_PUSHBUTTON);
+
+		lpw = (LPWORD) (lpdit + 1);
+		*lpw++ = 0xffff; *lpw++ = 0x0080;										// Button class
+		wcscpy( (LPWSTR) lpw, buttons[i] ); lpw += wcslen( buttons[i] ) + 1;	// text
+		*lpw++ = 0;																// creation data
+
+		bx += bw[i] + BUTTON_GAP;
+	}
+
+	delete[] wrappedText;
+	delete[] bw;
+	
+	return templ;
+}
+
+static BOOL CALLBACK focusDefaultButtonProc( HWND hwnd, LPARAM lParam ) {
+	if( ::GetWindowLong( hwnd, GWL_ID ) >= ID_BUTTON1 ) {
+		LONG style = ::GetWindowLong( hwnd, GWL_STYLE );
+		if( (style & BS_DEFPUSHBUTTON) != 0 ) {
+			::SetFocus( hwnd );
+			return FALSE;
+		}
+	}
+	return TRUE;
+}
+
+static INT_PTR CALLBACK messageDialogProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) {
+	switch( uMsg ) {
+		case WM_INITDIALOG:
+			::EnumChildWindows( hwnd, focusDefaultButtonProc, 0 );
+			break;
+
+		case WM_COMMAND:
+			::EndDialog( hwnd, wParam );
+			return TRUE;
+	}
+	return FALSE;
+}
+
+static int textLengthAsDLUs( HDC hdc, LPCWSTR str, int strLen ) {
+	SIZE size{ 0 };
+	::GetTextExtentPoint32( hdc, str, (strLen >= 0) ? strLen : wcslen( str ), &size );
+	return pixel2dluX( size.cx );
+}
+
+static LONG pixel2dluX( LONG px ) {
+	return MulDiv( px, 4, LOWORD( ::GetDialogBaseUnits() ) );
+}
+
+static LONG pixel2dluY( LONG py ) {
+	return MulDiv( py, 8, HIWORD( ::GetDialogBaseUnits() ) );
+}
+
+static LONG dluX2pixel( LONG dluX ) {
+	return MulDiv( dluX, LOWORD( ::GetDialogBaseUnits() ), 4 );
+}
+
+static LPWORD lpwAlign( LPWORD lpIn ) {
+	ULONG_PTR ul = (ULONG_PTR) lpIn;
+	ul += 3;
+	ul >>= 2;
+	ul <<= 2;
+	return (LPWORD) ul;
+}

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/WinWrapper.cpp

@@ -25,8 +25,8 @@
  * @author Karl Tauber
  */
 
-// see FlatWndProc.cpp
-HWND getWindowHandle( JNIEnv* env, jobject window );
+// declare external methods
+extern HWND getWindowHandle( JNIEnv* env, jobject window );
 
 //---- Utility ----------------------------------------------------------------
 

flatlaf-natives/flatlaf-natives-windows/src/main/headers/JNIUtils.h

@@ -0,0 +1,53 @@
+/*
+ * 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.
+ */
+
+#include <windows.h>
+#include <jni.h>
+
+/**
+ * @author Karl Tauber
+ */
+
+//---- class AutoReleaseString ------------------------------------------------
+
+class AutoReleaseString {
+	JNIEnv* env;
+	jstring javaString;
+	const jchar* chars;
+
+public:
+	AutoReleaseString( JNIEnv* _env, jstring _javaString );
+	~AutoReleaseString();
+
+	operator LPCWSTR() { return (LPCWSTR) chars; }
+};
+
+//---- class AutoReleaseStringArray -------------------------------------------
+
+class AutoReleaseStringArray {
+	JNIEnv* env;
+	jstring* javaStringArray;
+	const jchar** charsArray;
+
+public:
+	UINT count;
+
+public:
+	AutoReleaseStringArray( JNIEnv* _env, jobjectArray _javaStringArray );
+	~AutoReleaseStringArray();
+
+	operator LPCWSTR*() { return (LPCWSTR*) charsArray; }
+};

flatlaf-natives/flatlaf-natives-windows/src/main/headers/com_formdev_flatlaf_ui_FlatNativeWindowsLibrary.h

@@ -27,6 +27,52 @@ extern "C" {
 #define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_DWMWA_COLOR_DEFAULT -1L
 #undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_DWMWA_COLOR_NONE
 #define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_DWMWA_COLOR_NONE -2L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_OVERWRITEPROMPT
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_OVERWRITEPROMPT 2L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_STRICTFILETYPES
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_STRICTFILETYPES 4L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOCHANGEDIR
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOCHANGEDIR 8L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_PICKFOLDERS
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_PICKFOLDERS 32L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FORCEFILESYSTEM
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FORCEFILESYSTEM 64L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_ALLNONSTORAGEITEMS
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_ALLNONSTORAGEITEMS 128L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOVALIDATE
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOVALIDATE 256L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_ALLOWMULTISELECT
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_ALLOWMULTISELECT 512L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_PATHMUSTEXIST
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_PATHMUSTEXIST 2048L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FILEMUSTEXIST
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FILEMUSTEXIST 4096L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_CREATEPROMPT
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_CREATEPROMPT 8192L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_SHAREAWARE
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_SHAREAWARE 16384L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOREADONLYRETURN
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOREADONLYRETURN 32768L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOTESTFILECREATE
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NOTESTFILECREATE 65536L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_HIDEMRUPLACES
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_HIDEMRUPLACES 131072L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_HIDEPINNEDPLACES
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_HIDEPINNEDPLACES 262144L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NODEREFERENCELINKS
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_NODEREFERENCELINKS 1048576L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_OKBUTTONNEEDSINTERACTION
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_OKBUTTONNEEDSINTERACTION 2097152L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_DONTADDTORECENT
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_DONTADDTORECENT 33554432L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FORCESHOWHIDDEN
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FORCESHOWHIDDEN 268435456L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_DEFAULTNOMINIMODE
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_DEFAULTNOMINIMODE 536870912L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FORCEPREVIEWPANEON
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_FORCEPREVIEWPANEON 1073741824L
+#undef com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_SUPPORTSTREAMABLEITEMS
+#define com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_FOS_SUPPORTSTREAMABLEITEMS -2147483648L
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeWindowsLibrary
  * Method:    getOSBuildNumberImpl
@@ -67,6 +113,30 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_
 JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_dwmSetWindowAttributeDWORD
   (JNIEnv *, jclass, jlong, jint, jint);
 
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeWindowsLibrary
+ * Method:    showFileChooser
+ * Signature: (Ljava/awt/Window;ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeWindowsLibrary/FileChooserCallback;I[Ljava/lang/String;)[Ljava/lang/String;
+ */
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showFileChooser
+  (JNIEnv *, jclass, jobject, jboolean, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeWindowsLibrary
+ * Method:    showMessageDialog
+ * Signature: (JILjava/lang/String;Ljava/lang/String;I[Ljava/lang/String;)I
+ */
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageDialog
+  (JNIEnv *, jclass, jlong, jint, jstring, jstring, jint, jobjectArray);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeWindowsLibrary
+ * Method:    showMessageBox
+ * Signature: (JLjava/lang/String;Ljava/lang/String;I)I
+ */
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showMessageBox
+  (JNIEnv *, jclass, jlong, jstring, jstring, jint);
+
 #ifdef __cplusplus
 }
 #endif

flatlaf-natives/flatlaf-natives-windows/src/main/headers/com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc.h

@@ -19,6 +19,10 @@ extern "C" {
 #define com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTMAXBUTTON 9L
 #undef com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTTOP
 #define com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTTOP 12L
+#undef com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTTOPLEFT
+#define com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTTOPLEFT 13L
+#undef com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTTOPRIGHT
+#define com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTTOPRIGHT 14L
 #undef com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTCLOSE
 #define com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc_HTCLOSE 20L
 /*

flatlaf-swingx/README.md

@@ -38,9 +38,9 @@ build script:
 
 Otherwise, download `flatlaf-swingx-<version>.jar` here:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-swingx/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-swingx)
+[![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf-swingx?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf-swingx)
 
 
 SwingX library `swingx-all-<version>.jar` is also required:
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.swinglabs.swingx/swingx-all/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/org.swinglabs.swingx/swingx-all)
+[![Maven Central](https://img.shields.io/maven-central/v/org.swinglabs.swingx/swingx-all?style=flat-square)](https://central.sonatype.com/artifact/org.swinglabs.swingx/swingx-all)

flatlaf-testing/build.gradle.kts

@@ -41,6 +41,7 @@ dependencies {
 	implementation( libs.jide.oss )
 	implementation( libs.glazedlists )
 	implementation( libs.netbeans.api.awt )
+	implementation( libs.nativejfilechooser )
 
 	components.all<TargetJvmVersion8Rule>()
 }