release 3.2.3

- build using Java 21 (use toolchain because Gradle 8.4 does not support running on Java 21)
- no longer build on Java 19 and 20

.gitattributes

@@ -20,7 +20,9 @@
 *.gif binary
 *.jar binary
 *.lib binary
+*.otf binary
 *.png binary
 *.sketch binary
 *.so binary
+*.ttf binary
 *.zip binary

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: https://www.formdev.com/flatlaf/sponsor/

.github/workflows/ci.yml

@@ -1,4 +1,5 @@
-# https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+# 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: CI
 
@@ -8,9 +9,6 @@ on:
       - '*'
     tags:
       - '[0-9]*'
-  pull_request:
-    branches: 
-      - '*'
 
 jobs:
   build:
@@ -26,6 +24,10 @@ jobs:
           - 8
           - 11  # LTS
           - 17  # LTS
+        toolchain: [""]
+        include:
+          - java: 17
+            toolchain: 21  # latest
 
     steps:
       - uses: actions/checkout@v3
@@ -37,11 +39,15 @@ jobs:
         uses: actions/setup-java@v3
         with:
           java-version: ${{ matrix.java }}
-          distribution: adopt  # Java 8 and 11 are pre-installed on ubuntu-latest
+          distribution: temurin  # Java 8, 11 and 17 are pre-installed on ubuntu-latest
           cache: gradle
 
+      - name: Check with Error Prone
+        if: matrix.java == '11'
+        run: ./gradlew errorprone clean -Dtoolchain=${{ matrix.toolchain }}
+
       - name: Build with Gradle
-        run: ./gradlew build
+        run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v3
@@ -50,6 +56,7 @@ jobs:
           name: FlatLaf-build-artifacts
           path: |
             flatlaf-*/build/libs
+            flatlaf-*/flatlaf-*/build/libs
             !**/*-javadoc.jar
             !**/*-sources.jar
 
@@ -69,11 +76,11 @@ jobs:
         uses: actions/setup-java@v3
         with:
           java-version: 11
-          distribution: adopt  # pre-installed on ubuntu-latest
+          distribution: temurin  # pre-installed on ubuntu-latest
           cache: gradle
 
       - name: Publish snapshot to oss.sonatype.org
-        run: ./gradlew publish :flatlaf-theme-editor:build -Dorg.gradle.internal.publish.checksums.insecure=true
+        run: ./gradlew publish :flatlaf-theme-editor:build -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
         env:
           OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
           OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
@@ -105,11 +112,11 @@ jobs:
         uses: actions/setup-java@v3
         with:
           java-version: 11
-          distribution: adopt  # pre-installed on ubuntu-latest
+          distribution: temurin  # pre-installed on ubuntu-latest
           cache: gradle
 
       - name: Release a new stable version to Maven Central
-        run: ./gradlew publish :flatlaf-demo:build :flatlaf-theme-editor:build -Drelease=true
+        run: ./gradlew publish :flatlaf-demo:build :flatlaf-theme-editor:build -PskipFonts -Prelease -Dorg.gradle.parallel=false
         env:
           OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
           OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}

.github/workflows/fonts.yml

@@ -0,0 +1,60 @@
+# 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: Fonts
+
+on:
+    push:
+        branches:
+            - '*'
+        tags:
+            - 'fonts/*-[0-9]*'
+        paths:
+            - 'flatlaf-fonts/**'
+            - '.github/workflows/fonts.yml'
+            - 'gradle/wrapper/gradle-wrapper.properties'
+
+jobs:
+    Fonts:
+        strategy:
+            matrix:
+                font:
+                    - inter
+                    - jetbrains-mono
+                    - roboto
+                    - roboto-mono
+
+        runs-on: ubuntu-latest
+        if: |
+            github.event_name == 'push' &&
+            github.repository == 'JFormDesigner/FlatLaf'
+
+        steps:
+            - uses: actions/checkout@v3
+
+            - name: Setup Java 11
+              uses: actions/setup-java@v3
+              with:
+                  java-version: 11
+                  distribution: temurin  # pre-installed on ubuntu-latest
+                  cache: gradle
+
+            - name: Build with Gradle
+              run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:build
+              if: startsWith( github.ref, format( 'refs/tags/fonts/{0}-', matrix.font ) ) != true
+
+            - name: Publish snapshot to oss.sonatype.org
+              run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:publish -Dorg.gradle.internal.publish.checksums.insecure=true
+              env:
+                  OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+                  OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+              if: github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' )
+
+            - name: Release a new stable version to Maven Central
+              run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:build :flatlaf-fonts-${{ matrix.font }}:publish -Prelease
+              env:
+                  OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+                  OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+                  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

@@ -1,4 +1,5 @@
-# https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+# 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: Native Libraries
 
@@ -12,13 +13,6 @@ on:
             - 'flatlaf-natives/**'
             - '.github/workflows/natives.yml'
             - 'gradle/wrapper/gradle-wrapper.properties'
-    pull_request:
-        branches:
-            - '*'
-        paths:
-            - 'flatlaf-natives/**'
-            - '.github/workflows/natives.yml'
-            - 'gradle/wrapper/gradle-wrapper.properties'
 
 jobs:
     Natives:
@@ -39,7 +33,7 @@ jobs:
               uses: actions/setup-java@v3
               with:
                   java-version: 11
-                  distribution: adopt
+                  distribution: temurin
                   cache: gradle
 
             - name: Build with Gradle

.gitignore

@@ -9,5 +9,7 @@ out/
 *.iml
 *.ipr
 *.iws
+*.xcuserstate
+*.xcworkspacedata
 .vs/
 .vscode/

CHANGELOG.md

@@ -1,6 +1,261 @@
 FlatLaf Change Log
 ==================
 
+## 3.2.3
+
+#### Fixed bugs
+
+- Popup: Popups that request focus were not shown on Linux with Wayland and Java 21.
+  (issue #752)
+
+
+## 3.2.2
+
+#### Fixed bugs
+
+- Button: Fixed painting icon and text at wrong location when using HTML text,
+  left/right vertical alignment and running in Java 19+. (issue #746)
+- CheckBox and RadioButton: Fixed cut off right side when border is removed and
+  horizontal alignment is set to `right`. (issue #734)
+- TabbedPane: Fixed NPE when using focusable component as tab component and
+  switching theme. (issue #745)
+
+
+## 3.2.1
+
+#### Fixed bugs
+
+- Fixed memory leak in
+  `MultiResolutionImageSupport.create(int,Dimension[],Function<Dimension,Image>)`,
+  which caches images created by the producer function. Used by
+  `FlatSVGIcon.getImage()` and `FlatSVGUtils.createWindowIconImages()`. If you
+  use one of these methods, it is **strongly recommended** to upgrade to this
+  version, because if the returned image is larger and painted very often it may
+  result in an out-of-memory situation. (issue #726)
+- FileChooser: Fixed occasional NPE in `FlatShortcutsPanel` on Windows. (issue
+  #718)
+- TextField: Fixed placeholder text painting, which did not respect horizontal
+  alignment property of `JTextField`. (issue #721)
+- Popup: Fixed drop shadow if popup overlaps a heavyweight component. (Windows
+  10 only; issue #626)
+
+
+## 3.2
+
+#### New features and improvements
+
+- TabbedPane: Support rounded underline selection and rounded card tabs. (PR
+  #703)
+- FlatLaf window decorations:
+  - Support for Windows on ARM 64-bit. (issue #443, PR #707)
+  - Support toolbox-style "small" window title bar. (issue #659, PR #702)
+- Extras: Class `FlatSVGIcon` now uses [JSVG](https://github.com/weisJ/jsvg)
+  library (instead of svgSalamander) for rendering. JSVG provides improved SVG
+  rendering and uses less memory compared to svgSalamander. (PR #684)
+- ComboBox: Improved location of selected item in popup if list is large and
+  scrollable.
+- FileChooser: Show localized text for all locales supported by Java's Metal
+  look and feel. (issue #680)
+- Added system property `flatlaf.useNativeLibrary` to allow disabling loading of
+  FlatLaf native library. (issue #674)
+- IntelliJ Themes:
+  - Reduced memory footprint by releasing Json data and ignoring IntelliJ UI
+    properties that are not used in FlatLaf.
+  - Updated "Hiberbee Dark" and "Gradianto" themes.
+
+#### Fixed bugs
+
+- Styling: Fixed scaling of some styling properties (`rowHeight` for Table and
+  Tree; `iconTextGap` for Button, CheckBox and RadioButton). (issue #682)
+- Fixed `IllegalComponentStateException` when invoker is not showing in
+  `SubMenuUsabilityHelper`. (issue #692)
+- macOS themes: Changing `@accentColor` variable in FlatLaf properties files did
+  not change all accent related colors for all components.
+- IntelliJ Themes:
+  - "Light Owl" theme: Fixed wrong (unreadable) text color in selected menu
+    items, selected text in text components, and selection in ComboBox popup
+    list. (issue #687)
+  - "Gradianto Midnight Blue" theme: Fixed color of ScrollBar track, which was
+    not visible. (issue #686)
+  - "Monocai" theme: Fixed unreadable text color of default buttons. (issue
+    #693)
+  - "Vuesion" theme: Fixed foreground colors of disabled text.
+  - "Material UI Lite" themes: Fixed non-editable ComboBox button background.
+  - CheckBox and RadioButton: Fixed unselected icon colors for themes "Atom One
+    Light", "Cyan Light", "GitHub", "Light Owl", "Material Lighter" and
+    "Solarized Light".
+  - TabbedPane: Fixed focused tab background color for themes "Arc *", "Material
+    Design Dark", "Monocai", "One Dark", "Spacegray" and "Xcode-Dark". (issue
+    #697)
+  - TextComponents, ComboBox and Spinner: Fixed background colors of enabled
+    text components, to distinguish from disabled, for themes "Carbon", "Cobalt
+    2", "Gradianto *", "Gruvbox *", "Monocai", "Spacegray", "Vuesion",
+    "Xcode-Dark", "GitHub", and "Light Owl". (issue #528)
+  - Fixed wrong disabled text colors in "Dark Flat", "Hiberbee Dark", "Light
+    Flat", "Nord", "Solarized Dark" and "Solarized Light" themes.
+  - Fixed colors for selection background/foreground, Separator, Slider track
+    and ProgressBar background in various themes.
+- Native Windows libraries: Fixed crash when running in Java 8 and newer Java
+  version is installed in `PATH` environment variable and using class
+  `SystemInfo` before AWT initialization. (issue #673)
+- ComboBox: Fixed search in item list for text with spaces. (issue #691)
+- FormattedTextField: On Linux, fixed `IllegalArgumentException: Invalid
+  location` if `JFormattedTextField.setDocument()` is invoked in a focus gained
+  listener on that formatted text field. (issue #698)
+- PopupMenu: Make sure that popup menu does not overlap any operating system
+  task bar. (issue #701)
+- FileChooser: Use system icons on Windows with Java 17.0.3 (and later) 32-bit.
+  Only Java 17 - 17.0.2 32-bit do not use system icons because of a bug in Java
+  32-bit that crashes the application. (PR #709)
+- FileChooser: Fixed crash on Windows with Java 17 to 17.0.2 32-bit. Java 17
+  64-bit is not affected. (regression since FlatLaf 2.3; PR #522, see also issue
+  #403)
+
+#### Incompatibilities
+
+- Extras: Class `FlatSVGIcon` now uses [JSVG](https://github.com/weisJ/jsvg)
+  library for SVG rendering. You need to replace svgSalamander with JSVG in your
+  build scripts and distribute `jsvg.jar` with your application. Also replace
+  `com.kitfox.svg` with `com.github.weisj.jsvg` in `module-info.java` files.
+- IntelliJ Themes: Removed all "Contrast" themes from "Material UI Lite".
+
+
+## 3.1.1
+
+- IntelliJ Themes:
+  - Fixed too large menu item paddings and too large table/tree row heights (all
+    "Material Theme UI Lite" themes; issue #667; regression in FlatLaf 3.1).
+  - Fixed too large tree row height in "Carbon", "Dark Purple", "Gray",
+    "Material Design Dark", "Monokai Pro", "One Dark" and "Spacegray" themes.
+- Native libraries: Fixed `IllegalArgumentException: URI scheme is not "file"`
+  when using FlatLaf in WebStart. (issue #668; regression in FlatLaf 3.1)
+
+
+## 3.1
+
+#### New features and improvements
+
+- Windows 11: Popups (`JPopupMenu`, `JComboBox`, `JToolTip`, etc.) now use
+  native Windows 11 rounded borders and drop shadows. (PR #643)
+- Fonts:
+  - Added **Roboto Mono** (https://fonts.google.com/specimen/Roboto+Mono). (PR
+    #639, issue #638)
+  - Updated **JetBrains Mono** to
+    [v2.304](https://github.com/JetBrains/JetBrainsMono/releases/tag/v2.304).
+- Theme Editor: Support macOS light and dark themes.
+- TabbedPane: Support hover and focused tab foreground colors. (issue #627)
+- TabbedPane: `tabbedPane.getBackgroundAt(tabIndex)` now has higher priority
+  than `TabbedPane.focusColor` and `TabbedPane.selectedBackground`. If
+  `tabbedPane.setBackgroundAt(tabIndex)` is used to set a color for a single
+  tab, then this color is now used even if the tab is focused or selected.
+- TableHeader: Support column hover and pressed background and foreground
+  colors. (issue #636)
+- Native libraries: Made it easier to distribute FlatLaf native libraries
+  (Windows `.dll` and Linux `.so`) to avoid problems on operating systems with
+  enabled execution restrictions.
+  See https://www.formdev.com/flatlaf/native-libraries/ for more details. (issue #624)
+  - Published native libraries to Maven Central for easy using them as
+    dependencies in Gradle and Maven.
+  - If available, native libraries are now loaded from same location as
+    `flatlaf.jar`, otherwise they are extract from `flatlaf.jar` to temporary
+    folder and loaded from there.
+  - Windows DLLs are now digitally signed with FormDev Software GmbH
+    certificate.
+
+
+#### Fixed bugs
+
+- FlatLaf window decorations:
+  - Fixed inconsistent size of glass pane depending on whether FlatLaf window
+    decorations are used (e.g. Windows 10/11) or not (e.g. macOS). Now the glass
+    pane no longer overlaps the FlatLaf window title bar. (issue #630)
+  - Linux: Fixed broken window resizing on multi-screen setups. (issue #632)
+  - Linux: Fixed behavior of maximize/restore button when tiling window to left
+    or right half of screen. (issue #647)
+- IntelliJ Themes:
+  - Fixed default button hover background in "Solarized Light" theme. (issue
+    #628)
+  - Avoid that accent color affect some colors in some IntelliJ themes. (issue
+    #625)
+  - Updated "Hiberbee Dark" and "Material Theme UI Lite" themes.
+- Styling: Fixed resolving of UI variables in styles that use other variables.
+- MenuItem: Fixed horizontal alignment of icons. (issue #631)
+- Table: Fixed potential performance issue with paint cell focus indicator
+  border. (issue #654)
+- Tree: Fixed missing custom closed/opened/leaf icons of a custom
+  `DefaultTreeCellRenderer`. (issue #653; regression since implementing PR #609
+  in FlatLaf 3.0)
+- Tree: Fixed truncated node text and too small painted non-wide node background
+  if custom cell renderer sets icon, but not disabled icon, and tree is
+  disabled. (issue #640)
+- Fixed `HiDPIUtils.paintAtScale1x()`, which painted at wrong location if
+  graphics is rotated, is scaled and `x` or `y` parameters are not zero. (issue
+  #646)
+
+
+## 3.0
+
+#### New features and improvements
+
+- **macOS light and dark themes**: The two new themes `FlatMacLightLaf` and
+  `FlatMacDarkLaf` use macOS colors and look similar to native macOS controls.
+  (PRs #533, #612 and #607)
+- **Fonts**: Packaged some fonts into JARs and provide an easy way to use them
+  with FlatLaf. (PRs #545, #614 and #615) At the moment there are three fonts:
+  - **Inter** (https://rsms.me/inter/) - a typeface carefully crafted & designed
+    for computer screens
+  - **Roboto** (https://fonts.google.com/specimen/Roboto) - default font on
+    Android and recommended for Material Design
+  - **JetBrains Mono** (https://www.jetbrains.com/mono) - a monospaced typeface
+- **Rounded selection**: Optionally use rounded selection in:
+  - Menus (PR #536)
+  - ComboBox (PR #548)
+  - List (PR #547)
+  - Tree (PR #546)
+- Tree: Hide default closed/opened/leaf icons by default. Set UI value
+  `Tree.showDefaultIcons` to `true` to show them.
+- ToolBar: Hover effect for button groups. (PR #534)
+- Icons: New modern **rounded outlined icons** for `JFileChooser`,
+  `JOptionPane`, `JPasswordField` and `JTree`. (PR #577)
+
+#### Fixed bugs
+
+- FileChooser: Fixed layout of (optional) accessory component and fixed too
+  large right margin. (issue #604; regression since implementing PR #522 in
+  FlatLaf 2.3)
+- Tree:
+  - Fixed missing tree lines (if enabled) for wide-selected rows. (issue #598)
+  - Fixed scaling of tree lines and fixed alignment to expand/collapse arrows.
+  - Removed support for dashed tree lines. `Tree.lineTypeDashed` is now ignored.
+- SwingX: Fonts in `JXHeader`, `JXMonthView`, `JXTaskPane` and `JXTitledPanel`
+  were not updated when changing default font.
+
+
+## 2.6
+
+#### New features and improvements
+
+- If value of system property `flatlaf.nativeLibraryPath` is `system`, then
+  `System.loadLibrary(String)` is used to load the native library.
+- TabbedPane: Switch and close tabs on left mouse click only. (PR #595)
+
+#### Fixed bugs
+
+- ComboBox and Spinner: Fixed missing arrow buttons if preferred height is zero.
+  Minimum width of arrow buttons is 3/4 of default width.
+- MenuBar: Fixed NPE in `FlatMenuItemRenderer.getTopLevelFont()` if menu item
+  does not have a parent. (issue #600; regression since implementing #589 in
+  FlatLaf 2.5)
+- ScrollBar: Show "pressed" feedback on track/thumb only for left mouse button.
+  If absolute positioning is enabled (the default), then also for middle mouse
+  button.
+- Arrow buttons in ComboBox, Spinner, ScrollBar and TabbedPane: Show "pressed"
+  feedback only for left mouse button.
+- ScaledImageIcon: Do not throw exceptions if image was has invalid size (e.g.
+  not found). Instead, paint a red rectangle (similar to `FlatSVGIcon`).
+- Fixed NPE in `FlatUIUtils.isCellEditor()`. (issue #601)
+
+
 ## 2.5
 
 #### New features and improvements

README.md

@@ -6,7 +6,7 @@ Swing desktop applications.
 
 It looks almost flat (no shadows or gradients), clean, simple and elegant.
 FlatLaf comes with **Light**, **Dark**, **IntelliJ** and **Darcula** themes,
-scales on **HiDPI** displays and runs on Java 8 or newer.
+scales on **HiDPI** displays and runs on Java 8 or newer (LTS and latest).
 
 The look is heavily inspired by **Darcula** and **IntelliJ** themes from
 IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.
@@ -15,6 +15,11 @@ IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.
 
 ![FlatLaf Dark](images/flat_dark.png)
 
+macOS Themes
+------------
+
+![FlatLaf macOS themes](images/flat_macos_themes.png)
+
 
 IntelliJ Platform Themes
 ------------------------
@@ -25,6 +30,17 @@ FlatLaf can use 3rd party themes created for IntelliJ Platform (see
 ![IntelliJ Platform Themes](images/intellij_platform_themes.png)
 
 
+Sponsors
+--------
+
+<a href="https://www.ej-technologies.com/"><img src="https://www.formdev.com/flatlaf/sponsor/ej-technologies.png" width="200" alt="ej-technologies" title="ej-technologies - Java APM, Java Profiler, Java Installer Builder"></a>
+&nbsp; &nbsp; &nbsp; &nbsp;
+<a href="https://www.dbvis.com/"><img src="https://www.formdev.com/flatlaf/sponsor/dbvisualizer.svg" width="200" alt="DbVisualizer" title="DbVisualizer - SQL Client and Editor"></a>
+&nbsp; &nbsp; &nbsp; &nbsp;
+<a href="https://www.dscsag.com/"><img src="https://www.formdev.com/flatlaf/sponsor/DSC.png" height="48" alt="DSC Software AG" title="DSC Software AG - Your Companion for Integrative PLM"></a>
+
+[Become a Sponsor](https://www.formdev.com/flatlaf/sponsor/)
+
 Demo
 ----
 
@@ -50,6 +66,11 @@ 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)
 
+See also
+[Native Libraries distribution](https://www.formdev.com/flatlaf/native-libraries/)
+for instructions on how to redistribute FlatLaf native libraries with your
+application.
+
 
 ### Snapshots
 
@@ -74,6 +95,8 @@ Addons
 - [SwingX](flatlaf-swingx) - support for SwingX components
 - [JIDE Common Layer](flatlaf-jide-oss) - support for JIDE Common Layer
   components
+- [Fonts](flatlaf-fonts) - some font families bundled in easy-to-use and
+  redistributable JARs
 
 
 Getting started
@@ -119,6 +142,7 @@ Buzz
 ----
 
 - [What others say about FlatLaf on Twitter](https://twitter.com/search?f=live&q=flatlaf)
+- [FlatLaf 3.1 (and 3.0) announcement on Reddit](https://www.reddit.com/r/java/comments/12xgrsu/flatlaf_31_and_30_swing_look_and_feel/)
 - [FlatLaf 1.0 announcement on Reddit](https://www.reddit.com/r/java/comments/lsbcwe/flatlaf_10_swing_look_and_feel/)
 - [FlatLaf announcement on Reddit](https://www.reddit.com/r/java/comments/dl0hu3/flatlaf_flat_look_and_feel/)
 
@@ -126,99 +150,193 @@ Buzz
 Applications using FlatLaf
 --------------------------
 
-- ![New](images/new.svg) [Ultorg](https://www.ultorg.com/) (**commercial**) - a
-  visual query system for relational databases
-- ![New](images/new.svg) [MooInfo](https://github.com/rememberber/MooInfo) -
-  visual implementation of OSHI, to view information about the system and
-  hardware
-- ![New](images/new.svg) [Jailer](https://github.com/Wisser/Jailer) 11.2 -
-  database subsetting and relational data browsing tool
-- [Apache NetBeans](https://netbeans.apache.org/) 11.3 - IDE for Java, PHP, HTML
-  and much more
-- [jclasslib bytecode viewer](https://github.com/ingokegel/jclasslib) 5.5
-- [KeyStore Explorer](https://keystore-explorer.org/) 5.4.3
-- ![New](images/new.svg)
+### Featured
+
+- ![Sponsor](images/sponsor.svg) [JFormDesigner](https://www.formdev.com/)
+  (**commercial**) - Java/Swing GUI Designer (from the FlatLaf creators)
+- ![Sponsor](images/sponsor.svg)
+  [JProfiler](https://www.ej-technologies.com/products/jprofiler/overview.html)
+  (**commercial**) - the award-winning all-in-one Java profiler
+- ![Sponsor](images/sponsor.svg)
   [install4j](https://www.ej-technologies.com/products/install4j/overview.html)
-  9.0 (**commercial**) - the powerful multi-platform Java installer builder
-- ![New](images/new.svg) [DbVisualizer](https://www.dbvis.com/) 12.0
+  (**commercial**) - the powerful multi-platform Java installer builder
+- ![Sponsor](images/sponsor.svg) [DbVisualizer](https://www.dbvis.com/)
   (**commercial**) - the universal database tool for developers, analysts and
   DBAs
-- ![New](images/new.svg) [MagicPlot](https://magicplot.com/) 3.0
-  (**commercial**) - Software for nonlinear fitting, plotting and data analysis
-- ![New](images/new.svg)
-  [Thermo-Calc](https://thermocalc.com/products/thermo-calc/) 2021a
-  (**commercial**) - Thermodynamics and Properties Software
-- [OWASP ZAP](https://www.zaproxy.org/) 2.10 - the worlds most widely used web
-  app scanner
+- ![Hot](images/hot.svg) [Apache NetBeans](https://netbeans.apache.org/) - IDE
+  for Java, PHP, HTML and much more
+- ![Sponsor](images/sponsor.svg)
+  [Thermo-Calc](https://thermocalc.com/products/thermo-calc/) (**commercial**) -
+  Thermodynamics and Properties Software
+
+### Data
+
+- ![Hot](images/hot.svg) [Ultorg](https://www.ultorg.com/) (**commercial**) - a
+  visual query system for relational databases
+- [Jailer](https://github.com/Wisser/Jailer) - database subsetting and
+  relational data browsing tool
+- ![Hot](images/hot.svg) [MagicPlot](https://magicplot.com/) (**commercial**) -
+  Software for nonlinear fitting, plotting and data analysis
+- ![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
+  client
+
+### Security
+
+- ![Hot](images/hot.svg) [ZAP](https://www.zaproxy.org/) - the world's most
+  widely used web app scanner
+- ![Hot](images/hot.svg)
   [Burp Suite Professional and Community Edition](https://portswigger.net/burp/pro)
-  2020.11.2 (**commercial**) - the leading software for web security testing
+  (**commercial**) - the leading software for web security testing
 - ![New](images/new.svg)
-  [BurpCustomizer](https://github.com/CoreyD97/BurpCustomizer) - adds more
+  [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
+- [BurpCustomizer](https://github.com/CoreyD97/BurpCustomizer) - adds more
   FlatLaf themes to Burp Suite
-- [JOSM](https://josm.openstreetmap.de/) - an extensible editor for
-  [OpenStreetMap](https://www.openstreetmap.org/) (requires FlatLaf JOSM plugin)
-- [jAlbum](https://jalbum.net/) 21 (**commercial**) - creates photo album
-  websites
-- ![New](images/new.svg) [PDF Studio](https://www.qoppa.com/pdfstudio/) 2021
-  (**commercial**) - create, review and edit PDF documents
-- [XMLmind XML Editor](https://www.xmlmind.com/xmleditor/) 9.3 (**commercial**)
-- [Total Validator](https://www.totalvalidator.com/) 15 (**commercial**) -
-  checks your website
-- [j-lawyer](https://github.com/jlawyerorg/j-lawyer-org) - Kanzleisoftware
-- [MegaMek](https://github.com/MegaMek/megamek),
-  [MegaMekLab](https://github.com/MegaMek/megameklab) and
-  [MekHQ](https://github.com/MegaMek/mekhq) v0.47.5+ - a sci-fi tabletop
-  BattleTech simulator suite handling battles, unit building, and campaigns
-- [GUIslice Builder](https://github.com/ImpulseAdventure/GUIslice-Builder)
-  0.13.b024 - GUI builder for
-  [GUIslice](https://github.com/ImpulseAdventure/GUIslice), a lightweight GUI
-  framework for embedded displays
-- [Rest Suite](https://github.com/supanadit/restsuite) - Rest API testing
-- [ControllerBuddy](https://github.com/bwRavencl/ControllerBuddy) - advanced
-  gamepad mapping software
-- [SpringRemote](https://github.com/HaleyWang/SpringRemote) - remote Linux SSH
-  connections manager
-- [jEnTunnel](https://github.com/ggrandes/jentunnel) - manage SSH Tunnels made
-  easy
+- [Total Validator](https://www.totalvalidator.com/) (**commercial**) - checks
+  your website
+- [JPass](https://github.com/gaborbata/jpass) - password manager with strong
+  encryption
+
+### Software Development
+
+- [jclasslib bytecode viewer](https://github.com/ingokegel/jclasslib)
+- [KeyStore Explorer](https://keystore-explorer.org/)
+- ![New](images/new.svg)
+  [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
+- [Pseudo Assembler IDE](https://github.com/tomasz-herman/PseudoAssemblerIDE) -
+  IDE for Pseudo-Assembler
+- [Linotte](https://github.com/cpc6128/LangageLinotte) - French programming
+  language created to learn programming
+- [lsfusion platform](https://github.com/lsfusion/platform) - information
+  systems development platform
+
+### Electrical
+
+- [Antares](https://www.antarescircuit.io/) - a free, powerful platform for
+  designing, simulating and explaining digital circuits
+- [Logisim-evolution](https://github.com/logisim-evolution/logisim-evolution) -
+  Digital logic design tool and simulator
+- [Makelangelo Software](https://github.com/MarginallyClever/Makelangelo-software) -
+  for plotters, especially the wall-hanging polargraph
+- [GUIslice Builder](https://github.com/ImpulseAdventure/GUIslice-Builder) - GUI
+  builder for [GUIslice](https://github.com/ImpulseAdventure/GUIslice), a
+  lightweight GUI framework for embedded displays
+- [ThunderFocus](https://github.com/marcocipriani01/ThunderFocus) -
+  Arduino-based telescope focuser
+- [RemoteLight](https://github.com/Drumber/RemoteLight) - multifunctional LED
+  control software
+
+### Media
+
+- ![Hot](images/hot.svg) [jAlbum](https://jalbum.net/) (**commercial**) -
+  creates photo album websites
+- ![New](images/new.svg) [MediathekView](https://mediathekview.de/) - search in
+  media libraries of various German broadcasters
+- [Cinecred](https://loadingbyte.com/cinecred/) - create beautiful film credit
+  sequences
+- [tinyMediaManager](https://www.tinymediamanager.org/) (**commercial**) - a
+  media management tool
+- [Weasis](https://nroduit.github.io/) - medical DICOM viewer used in healthcare
+  by hospitals, health networks, etc
+- [Shutter Encoder](https://www.shutterencoder.com/)
+  ([source code](https://github.com/paulpacifico/shutter-encoder)) -
+  professional video converter and compression tool
+- [Sound Analysis](https://github.com/tomasz-herman/SoundAnalysis) - analyze
+  sound files in time or frequency domain
+- [Novel-Grabber](https://github.com/Flameish/Novel-Grabber) - download novels
+  from any webnovel and lightnovel site
+- [lectureStudio](https://www.lecturestudio.org/) - digitize your lectures with
+  ease
+
+### Modelling
+
+- ![New](images/new.svg) [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
+
+### Documents
+
+- ![New](images/new.svg) [Big Faceless (BFO) PDF Viewer](https://bfo.com/)
+  (**commercial**) - Swing PDF Viewer
+- [PDF Studio](https://www.qoppa.com/pdfstudio/) (**commercial**) - create,
+  review and edit PDF documents
+- [XMLmind XML Editor](https://www.xmlmind.com/xmleditor/) (**commercial**)
+
+### Geo
+
+- ![Hot](images/hot.svg) [JOSM](https://josm.openstreetmap.de/) - an extensible
+  editor for [OpenStreetMap](https://www.openstreetmap.org/) (requires FlatLaf
+  JOSM plugin)
+- [Mapton](https://mapton.org/)
+  ([source code](https://github.com/trixon/mapton)) - some kind of map
+  application (based on NetBeans platform)
+- [MeteoInfo](https://github.com/meteoinfo/MeteoInfo) - GIS and scientific
+  computation environment for meteorological community
+
+### Business / Legal
+
+- ![Sponsor](images/sponsor.svg)
+  [j-lawyer](https://github.com/jlawyerorg/j-lawyer-org) - Kanzleisoftware
+- ![Sponsor](images/sponsor.svg) [Jeyla Studio](https://www.jeylastudio.com/) -
+  Salon Software
+- [Fanurio](https://www.fanuriotimetracking.com/) (**commercial**) - time
+  tracking and billing for freelancers and teams
+- [Jes](https://www.jes-eur.de) - Die Java-EÜR
 - [mendelson AS2](https://sourceforge.net/projects/mec-as2/),
   [AS4](https://sourceforge.net/projects/mendelson-as4/) and
   [OFTP2](https://sourceforge.net/projects/mendelson-oftp2/) (open-source) and
   [mendelson AS2](https://mendelson-e-c.com/as2/),
   [AS4](https://mendelson-e-c.com/as4/) and
   [OFTP2](https://mendelson-e-c.com/oftp2) (**commercial**)
-- ![New](images/new.svg) [IGMAS+](https://www.gfz-potsdam.de/igmas) -
-  Interactive Gravity and Magnetic Application System
-- [MeteoInfo](https://github.com/meteoinfo/MeteoInfo) 2.2 - GIS and scientific
-  computation environment for meteorological community
-- [lsfusion platform](https://github.com/lsfusion/platform) 4 - information
-  systems development platform
-- [JPass](https://github.com/gaborbata/jpass) - password manager with strong
-  encryption
-- [Jes - Die Java-EÜR](https://www.jes-eur.de)
-- [Mapton](https://mapton.org/) 2.0
-  ([source code](https://github.com/trixon/mapton)) - some kind of map
-  application (based on NetBeans platform)
-- [Pseudo Assembler IDE](https://github.com/tomasz-herman/PseudoAssemblerIDE) -
-  IDE for Pseudo-Assembler
-- [Linotte](https://github.com/cpc6128/LangageLinotte) 3.1 - French programming
-  language created to learn programming
-- [MEKA](https://github.com/Waikato/meka) 1.9.3 - multi-label classifiers and
-  evaluation procedures using the Weka machine learning framework
-- [Shutter Encoder](https://www.shutterencoder.com/) 14.2
-  ([source code](https://github.com/paulpacifico/shutter-encoder)) -
-  professional video converter and compression tool (screenshots show **old**
-  look)
-- [Sound Analysis](https://github.com/tomasz-herman/SoundAnalysis) - analyze
-  sound files in time or frequency domain
-- [RemoteLight](https://github.com/Drumber/RemoteLight) - multifunctional LED
-  control software
-- [ThunderFocus](https://github.com/marcocipriani01/ThunderFocus) -
-  Arduino-based telescope focuser
-- [Novel-Grabber](https://github.com/Flameish/Novel-Grabber) - download novels
-  from any webnovel and lightnovel site
-- [lectureStudio](https://www.lecturestudio.org/) 4.3.1060 - digitize your
-  lectures with ease
+
+### Messaging
+
+- ![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
+
+### Gaming
+
+- ![New](images/new.svg) ![Sponsor](images/sponsor.svg)
+  [BGBlitz](https://www.bgblitz.com/) (**commercial**) - professional Backgammon
+- ![New](images/new.svg) [MapTool](https://github.com/RPTools/maptool) - virtual
+  Tabletop for playing role-playing games
+- [MegaMek](https://github.com/MegaMek/megamek),
+  [MegaMekLab](https://github.com/MegaMek/megameklab) and
+  [MekHQ](https://github.com/MegaMek/mekhq) - a sci-fi tabletop BattleTech
+  simulator suite handling battles, unit building, and campaigns
+- [ControllerBuddy](https://github.com/bwRavencl/ControllerBuddy) - advanced
+  gamepad mapping software
+
+### Utilities
+
+- [MooInfo](https://github.com/rememberber/MooInfo) - visual implementation of
+  OSHI, to view information about the system and hardware
+- ![New](images/new.svg)
+  [Linux Task Manager (LTM)](https://github.com/ajee10x/LTM-LinuxTaskManager) -
+  GUI for monitoring and managing various aspects of a Linux system
+- [Rest Suite](https://github.com/supanadit/restsuite) - Rest API testing
+- [SpringRemote](https://github.com/HaleyWang/SpringRemote) - remote Linux SSH
+  connections manager
+- [jEnTunnel](https://github.com/ggrandes/jentunnel) - manage SSH Tunnels made
+  easy
 - [Android Tool](https://github.com/fast-geek/Android-Tool) - makes popular adb
   and fastboot commands easier to use
-- and more...
+
+### Miscellaneous
+
+- [MEKA](https://github.com/Waikato/meka) - multi-label classifiers and
+  evaluation procedures using the Weka machine learning framework

build.gradle.kts

@@ -14,10 +14,9 @@
  * limitations under the License.
  */
 
-val releaseVersion = "2.5"
-val developmentVersion = "3.0-SNAPSHOT"
+import net.ltgt.gradle.errorprone.errorprone
 
-version = if( java.lang.Boolean.getBoolean( "release" ) ) releaseVersion else developmentVersion
+version = property( if( hasProperty( "release" ) ) "flatlaf.releaseVersion" else "flatlaf.developmentVersion" ) as String
 
 allprojects {
 	version = rootProject.version
@@ -37,9 +36,16 @@ 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()
 
 
+plugins {
+	alias( libs.plugins.errorprone ) apply false
+}
+
 allprojects {
 	tasks {
 		withType<JavaCompile>().configureEach {
@@ -78,4 +84,56 @@ allprojects {
 			isFailOnError = false
 		}
 	}
+
+
+	//---- Error Prone ----
+
+	tasks.register( "errorprone" ) {
+		group = "verification"
+		tasks.withType<JavaCompile>().forEach {
+			dependsOn( it )
+		}
+	}
+
+	val useErrorProne = gradle.startParameter.taskNames.contains( "errorprone" )
+	if( useErrorProne ) {
+		plugins.withType<JavaPlugin> {
+			apply( plugin = libs.plugins.errorprone.get().pluginId )
+
+			dependencies {
+				"errorprone"( libs.errorprone )
+			}
+
+			tasks.withType<JavaCompile>().configureEach {
+				options.compilerArgs.add( "-Werror" )
+				options.errorprone {
+					disable(
+						"ReferenceEquality",	// reports usage of '==' for objects
+						"StringSplitter",		// reports String.split()
+						"JavaTimeDefaultTimeZone",	// reports Year.now()
+						"MissingSummary",		// reports `/** @since 2 */`
+						"InvalidBlockTag",		// reports @uiDefault in javadoc
+						"AlreadyChecked",		// reports false positives
+						"InlineMeSuggester",	// suggests using Error Prone annotations for deprecated methods
+						"TypeParameterUnusedInFormals",
+						"UnsynchronizedOverridesSynchronized",
+						"NonApiType",			// reports ArrayList/HashSet in parameter or return type
+					)
+					when( project.name ) {
+						"flatlaf-intellij-themes" -> disable(
+							"MutablePublicArray",	// reports FlatAllIJThemes.INFOS
+						)
+						"flatlaf-theme-editor" -> disable(
+							"CatchAndPrintStackTrace",
+						)
+						"flatlaf-testing" -> disable(
+							"CatchAndPrintStackTrace",
+							"JdkObsolete",			// reports Hashtable used for JSlider.setLabelTable()
+							"JavaUtilDate",			// reports usage of class Date
+						)
+					}
+				}
+			}
+		}
+	}
 }

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

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

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

@@ -15,10 +15,13 @@
  */
 
 
+open class NativeArtifact( val fileName: String, val classifier: String, val type: String ) {}
+
 open class PublishExtension {
 	var artifactId: String? = null
 	var name: String? = null
 	var description: String? = null
+	var nativeArtifacts: List<NativeArtifact>? = null
 }
 
 val extension = project.extensions.create<PublishExtension>( "flatlafPublish" )
@@ -71,6 +74,15 @@ publishing {
 					url.set( "https://github.com/JFormDesigner/FlatLaf/issues" )
 				}
 			}
+
+			afterEvaluate {
+				extension.nativeArtifacts?.forEach {
+					artifact( artifacts.add( "archives", file( it.fileName ) ) {
+						classifier = it.classifier
+						type = it.type
+					} )
+				}
+			}
 		}
 	}
 
@@ -80,7 +92,7 @@ publishing {
 
 			val releasesRepoUrl = "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
 			val snapshotsRepoUrl = "https://oss.sonatype.org/content/repositories/snapshots/"
-			url = uri( if( java.lang.Boolean.getBoolean( "release" ) ) releasesRepoUrl else snapshotsRepoUrl )
+			url = uri( if( rootProject.hasProperty( "release" ) ) releasesRepoUrl else snapshotsRepoUrl )
 
 			credentials {
 				// get from gradle.properties
@@ -108,5 +120,13 @@ signing {
 
 // disable signing of snapshots
 tasks.withType<Sign>().configureEach {
-	onlyIf { java.lang.Boolean.getBoolean( "release" ) }
+	onlyIf { rootProject.hasProperty( "release" ) }
+}
+
+// check whether parallel build is enabled
+tasks.withType<PublishToMavenRepository>().configureEach {
+	doFirst {
+		if( System.getProperty( "org.gradle.parallel" ) == "true" )
+			throw RuntimeException( "Publishing does not work correctly with enabled parallel build. Disable parallel build with VM option '-Dorg.gradle.parallel=false'." )
+	}
 }

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

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2022 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.
+ */
+
+plugins {
+	java
+}
+
+val toolchainJavaVersion = System.getProperty( "toolchain" )
+if( !toolchainJavaVersion.isNullOrEmpty() ) {
+	java.toolchain {
+		languageVersion.set( JavaLanguageVersion.of( toolchainJavaVersion ) )
+	}
+}

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

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

flatlaf-core/build.gradle.kts

@@ -14,8 +14,11 @@
  * limitations under the License.
  */
 
+import Flatlaf_publish_gradle.NativeArtifact
+
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-java9`
 	`flatlaf-publish`
@@ -24,12 +27,11 @@ plugins {
 val sigtest = configurations.create( "sigtest" )
 
 dependencies {
-	testImplementation( "org.junit.jupiter:junit-jupiter-api:5.7.2" )
-	testImplementation( "org.junit.jupiter:junit-jupiter-params" )
-	testRuntimeOnly( "org.junit.jupiter:junit-jupiter-engine" )
+	testImplementation( libs.bundles.junit )
+	testRuntimeOnly( libs.junit.engine )
 
 	// https://github.com/jtulach/netbeans-apitest
-	sigtest( "org.netbeans.tools:sigtest-maven-plugin:1.7" )
+	sigtest( libs.sigtest )
 }
 
 java {
@@ -40,7 +42,7 @@ java {
 tasks {
 	compileJava {
 		// generate JNI headers
-		options.headerOutputDirectory.set( buildDir.resolve( "generated/jni-headers" ) )
+		options.headerOutputDirectory.set( layout.buildDirectory.dir( "generated/jni-headers" ) )
 	}
 
 	jar {
@@ -86,7 +88,7 @@ tasks {
 					"action" to "generate",
 					"fileName" to "${project.name}-sigtest.txt",
 					"classpath" to jar.get().outputs.files.asPath,
-					"packages" to "com.formdev.flatlaf,com.formdev.flatlaf.util",
+					"packages" to "com.formdev.flatlaf,com.formdev.flatlaf.themes,com.formdev.flatlaf.util",
 					"version" to version,
 					"release" to "1.8", // Java version
 					"failonerror" to "true" )
@@ -122,4 +124,12 @@ flatlafPublish {
 	artifactId = "flatlaf"
 	name = "FlatLaf"
 	description = "Flat Look and Feel"
+
+	val natives = "src/main/resources/com/formdev/flatlaf/natives"
+	nativeArtifacts = listOf(
+		NativeArtifact( "${natives}/flatlaf-windows-x86.dll",    "windows-x86",    "dll" ),
+		NativeArtifact( "${natives}/flatlaf-windows-x86_64.dll", "windows-x86_64", "dll" ),
+		NativeArtifact( "${natives}/flatlaf-windows-arm64.dll",  "windows-arm64",  "dll" ),
+		NativeArtifact( "${natives}/libflatlaf-linux-x86_64.so", "linux-x86_64",   "so" ),
+	)
 }

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 2.4
+#Version 3.2.3
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -11,6 +11,8 @@ fld public final static java.lang.String BUTTON_TYPE_TAB = "tab"
 fld public final static java.lang.String BUTTON_TYPE_TOOLBAR_BUTTON = "toolBarButton"
 fld public final static java.lang.String COMPONENT_FOCUS_OWNER = "JComponent.focusOwner"
 fld public final static java.lang.String COMPONENT_ROUND_RECT = "JComponent.roundRect"
+fld public final static java.lang.String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption"
+fld public final static java.lang.String GLASS_PANE_FULL_HEIGHT = "JRootPane.glassPaneFullHeight"
 fld public final static java.lang.String MENU_BAR_EMBEDDED = "JRootPane.menuBarEmbedded"
 fld public final static java.lang.String MINIMUM_HEIGHT = "JComponent.minimumHeight"
 fld public final static java.lang.String MINIMUM_WIDTH = "JComponent.minimumWidth"
@@ -18,6 +20,7 @@ fld public final static java.lang.String OUTLINE = "JComponent.outline"
 fld public final static java.lang.String OUTLINE_ERROR = "error"
 fld public final static java.lang.String OUTLINE_WARNING = "warning"
 fld public final static java.lang.String PLACEHOLDER_TEXT = "JTextField.placeholderText"
+fld public final static java.lang.String POPUP_BORDER_CORNER_RADIUS = "Popup.borderCornerRadius"
 fld public final static java.lang.String POPUP_DROP_SHADOW_PAINTED = "Popup.dropShadowPainted"
 fld public final static java.lang.String POPUP_FORCE_HEAVY_WEIGHT = "Popup.forceHeavyWeight"
 fld public final static java.lang.String PROGRESS_BAR_LARGE_HEIGHT = "JProgressBar.largeHeight"
@@ -85,10 +88,16 @@ fld public final static java.lang.String TEXT_FIELD_TRAILING_COMPONENT = "JTextF
 fld public final static java.lang.String TEXT_FIELD_TRAILING_ICON = "JTextField.trailingIcon"
 fld public final static java.lang.String TITLE_BAR_BACKGROUND = "JRootPane.titleBarBackground"
 fld public final static java.lang.String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground"
+fld public final static java.lang.String TITLE_BAR_SHOW_CLOSE = "JRootPane.titleBarShowClose"
 fld public final static java.lang.String TITLE_BAR_SHOW_ICON = "JRootPane.titleBarShowIcon"
+fld public final static java.lang.String TITLE_BAR_SHOW_ICONIFFY = "JRootPane.titleBarShowIconify"
+fld public final static java.lang.String TITLE_BAR_SHOW_MAXIMIZE = "JRootPane.titleBarShowMaximize"
+fld public final static java.lang.String TITLE_BAR_SHOW_TITLE = "JRootPane.titleBarShowTitle"
 fld public final static java.lang.String TREE_PAINT_SELECTION = "JTree.paintSelection"
 fld public final static java.lang.String TREE_WIDE_SELECTION = "JTree.wideSelection"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "JRootPane.useWindowDecorations"
+fld public final static java.lang.String WINDOW_STYLE = "Window.style"
+fld public final static java.lang.String WINDOW_STYLE_SMALL = "small"
 meth public static <%0 extends java.lang.Object> {%%0} clientProperty(javax.swing.JComponent,java.lang.String,{%%0},java.lang.Class<{%%0}>)
 meth public static boolean clientPropertyBoolean(javax.swing.JComponent,java.lang.String,boolean)
 meth public static boolean clientPropertyEquals(javax.swing.JComponent,java.lang.String,java.lang.Object)
@@ -185,6 +194,7 @@ meth public java.lang.String getID()
 meth public java.util.Map<java.lang.String,java.lang.String> getExtraDefaults()
 meth public javax.swing.Icon getDisabledIcon(javax.swing.JComponent,javax.swing.Icon)
 meth public javax.swing.UIDefaults getDefaults()
+meth public static <%0 extends java.lang.Object> {%%0} getStyleableValue(javax.swing.JComponent,java.lang.String)
 meth public static boolean install(javax.swing.LookAndFeel)
  anno 0 java.lang.Deprecated()
 meth public static boolean isLafDark()
@@ -193,7 +203,13 @@ meth public static boolean isUseNativeWindowDecorations()
 meth public static boolean setup(javax.swing.LookAndFeel)
 meth public static boolean supportsNativeWindowDecorations()
 meth public static java.lang.Object parseDefaultsValue(java.lang.String,java.lang.String,java.lang.Class<?>)
+meth public static java.lang.String getPreferredFontFamily()
+meth public static java.lang.String getPreferredLightFontFamily()
+meth public static java.lang.String getPreferredMonospacedFontFamily()
+meth public static java.lang.String getPreferredSemiboldFontFamily()
+meth public static java.util.Map<java.lang.String,java.lang.Class<?>> getStyleableInfos(javax.swing.JComponent)
 meth public static java.util.Map<java.lang.String,java.lang.String> getGlobalExtraDefaults()
+meth public static java.util.function.Function<java.lang.String,java.awt.Color> getSystemColorGetter()
 meth public static javax.swing.UIDefaults$ActiveValue createActiveFontValue(float)
 meth public static void hideMnemonics()
 meth public static void initIconColors(javax.swing.UIDefaults,boolean)
@@ -206,6 +222,11 @@ meth public static void repaintAllFramesAndDialogs()
 meth public static void revalidateAndRepaintAllFramesAndDialogs()
 meth public static void runWithUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object>,java.lang.Runnable)
 meth public static void setGlobalExtraDefaults(java.util.Map<java.lang.String,java.lang.String>)
+meth public static void setPreferredFontFamily(java.lang.String)
+meth public static void setPreferredLightFontFamily(java.lang.String)
+meth public static void setPreferredMonospacedFontFamily(java.lang.String)
+meth public static void setPreferredSemiboldFontFamily(java.lang.String)
+meth public static void setSystemColorGetter(java.util.function.Function<java.lang.String,java.awt.Color>)
 meth public static void setUseNativeWindowDecorations(boolean)
 meth public static void showMnemonics(java.awt.Component)
 meth public static void unregisterCustomDefaultsSource(java.io.File)
@@ -220,7 +241,7 @@ meth public void setExtraDefaults(java.util.Map<java.lang.String,java.lang.Strin
 meth public void uninitialize()
 meth public void unregisterUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object>)
 supr javax.swing.plaf.basic.BasicLookAndFeel
-hfds DESKTOPFONTHINTS,aquaLoaded,customDefaultsSources,desktopPropertyListener,desktopPropertyName,desktopPropertyName2,extraDefaults,globalExtraDefaults,mnemonicHandler,oldPopupFactory,postInitialization,subMenuUsabilityHelperInstalled,uiDefaultsGetters,updateUIPending
+hfds DESKTOPFONTHINTS,aquaLoaded,customDefaultsSources,desktopPropertyListener,desktopPropertyName,desktopPropertyName2,extraDefaults,getUIMethod,getUIMethodInitialized,globalExtraDefaults,mnemonicHandler,oldPopupFactory,postInitialization,preferredFontFamily,preferredLightFontFamily,preferredMonospacedFontFamily,preferredSemiboldFontFamily,subMenuUsabilityHelperInstalled,systemColorGetter,uiDefaultsGetters,updateUIPending
 hcls ActiveFont,FlatUIDefaults,ImageIconUIResource
 
 CLSS public abstract interface static com.formdev.flatlaf.FlatLaf$DisabledIconProvider
@@ -259,7 +280,9 @@ fld public final static java.lang.String NATIVE_LIBRARY_PATH = "flatlaf.nativeLi
 fld public final static java.lang.String UI_SCALE = "flatlaf.uiScale"
 fld public final static java.lang.String UI_SCALE_ALLOW_SCALE_DOWN = "flatlaf.uiScale.allowScaleDown"
 fld public final static java.lang.String UI_SCALE_ENABLED = "flatlaf.uiScale.enabled"
+fld public final static java.lang.String UPDATE_UI_ON_SYSTEM_FONT_CHANGE = "flatlaf.updateUIOnSystemFontChange"
 fld public final static java.lang.String USE_JETBRAINS_CUSTOM_DECORATIONS = "flatlaf.useJetBrainsCustomDecorations"
+fld public final static java.lang.String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary"
 fld public final static java.lang.String USE_TEXT_Y_CORRECTION = "flatlaf.useTextYCorrection"
 fld public final static java.lang.String USE_UBUNTU_FONT = "flatlaf.useUbuntuFont"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "flatlaf.useWindowDecorations"
@@ -278,7 +301,7 @@ meth public static boolean setup(java.io.InputStream)
 meth public static com.formdev.flatlaf.FlatLaf createLaf(com.formdev.flatlaf.IntelliJTheme)
 meth public static com.formdev.flatlaf.FlatLaf createLaf(java.io.InputStream) throws java.io.IOException
 supr java.lang.Object
-hfds checkboxDuplicateColors,checkboxKeyMapping,colors,icons,isMaterialUILite,namedColors,ui,uiKeyCopying,uiKeyInverseMapping,uiKeyMapping
+hfds checkboxDuplicateColors,checkboxKeyMapping,colors,icons,isMaterialUILite,namedColors,ui,uiKeyCopying,uiKeyDoNotOverride,uiKeyExcludes,uiKeyInverseMapping,uiKeyMapping
 
 CLSS public static com.formdev.flatlaf.IntelliJTheme$ThemeLaf
  outer com.formdev.flatlaf.IntelliJTheme
@@ -291,6 +314,26 @@ meth public java.lang.String getName()
 supr com.formdev.flatlaf.FlatLaf
 hfds theme
 
+CLSS public com.formdev.flatlaf.themes.FlatMacDarkLaf
+cons public init()
+fld public final static java.lang.String NAME = "FlatLaf macOS Dark"
+meth public boolean isDark()
+meth public java.lang.String getDescription()
+meth public java.lang.String getName()
+meth public static boolean setup()
+meth public static void installLafInfo()
+supr com.formdev.flatlaf.FlatDarkLaf
+
+CLSS public com.formdev.flatlaf.themes.FlatMacLightLaf
+cons public init()
+fld public final static java.lang.String NAME = "FlatLaf macOS Light"
+meth public boolean isDark()
+meth public java.lang.String getDescription()
+meth public java.lang.String getName()
+meth public static boolean setup()
+meth public static void installLafInfo()
+supr com.formdev.flatlaf.FlatLightLaf
+
 CLSS public abstract interface com.formdev.flatlaf.util.AnimatedIcon
 innr public static AnimationSupport
 intf javax.swing.Icon
@@ -358,6 +401,7 @@ meth public static float clamp(float)
 meth public static float luma(java.awt.Color)
 meth public static java.awt.Color darken(java.awt.Color,float)
 meth public static java.awt.Color desaturate(java.awt.Color,float)
+meth public static java.awt.Color fade(java.awt.Color,float)
 meth public static java.awt.Color lighten(java.awt.Color,float)
 meth public static java.awt.Color mix(java.awt.Color,java.awt.Color,float)
 meth public static java.awt.Color saturate(java.awt.Color,float)
@@ -433,6 +477,17 @@ meth public java.lang.String toString()
 supr javax.swing.plaf.ColorUIResource
 hfds baseOfDefaultColorRGB,functions,hasBaseOfDefaultColor
 
+CLSS public com.formdev.flatlaf.util.FontUtils
+cons public init()
+meth public static boolean installFont(java.net.URL)
+meth public static java.awt.Font getCompositeFont(java.lang.String,int,int)
+meth public static java.awt.Font[] getAllFonts()
+meth public static java.lang.String[] getAvailableFontFamilyNames()
+meth public static void loadFontFamily(java.lang.String)
+meth public static void registerFontFamilyLoader(java.lang.String,java.lang.Runnable)
+supr java.lang.Object
+hfds loadersMap
+
 CLSS public com.formdev.flatlaf.util.Graphics2DProxy
 cons public init(java.awt.Graphics2D)
 meth public boolean drawImage(java.awt.Image,int,int,int,int,int,int,int,int,java.awt.Color,java.awt.image.ImageObserver)
@@ -569,7 +624,7 @@ meth public static void drawStringWithYCorrection(javax.swing.JComponent,java.aw
 meth public static void paintAtScale1x(java.awt.Graphics2D,int,int,int,int,com.formdev.flatlaf.util.HiDPIUtils$Painter)
 meth public static void paintAtScale1x(java.awt.Graphics2D,javax.swing.JComponent,com.formdev.flatlaf.util.HiDPIUtils$Painter)
 supr java.lang.Object
-hfds useTextYCorrection
+hfds CORRECTION_INTER,CORRECTION_OPEN_SANS,CORRECTION_SEGOE_UI,CORRECTION_TAHOMA,SCALE_FACTORS,useDebugScaleFactor,useTextYCorrection
 
 CLSS public abstract interface static com.formdev.flatlaf.util.HiDPIUtils$Painter
  outer com.formdev.flatlaf.util.HiDPIUtils
@@ -600,6 +655,7 @@ supr java.lang.Object
 
 CLSS public com.formdev.flatlaf.util.NativeLibrary
 cons public init(java.io.File,boolean)
+cons public init(java.lang.String,boolean)
 cons public init(java.lang.String,java.lang.ClassLoader,boolean)
 meth public boolean isLoaded()
 supr java.lang.Object

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

@@ -17,6 +17,8 @@
 package com.formdev.flatlaf;
 
 import java.awt.Color;
+import java.awt.IllegalComponentStateException;
+import java.awt.Window;
 import java.util.Objects;
 import javax.swing.JComponent;
 import javax.swing.SwingConstants;
@@ -124,6 +126,7 @@ public interface FlatClientProperties
 	 */
 	String SQUARE_SIZE = "JButton.squareSize";
 
+
 	//---- JComponent ---------------------------------------------------------
 
 	/**
@@ -266,8 +269,28 @@ public interface FlatClientProperties
 	 */
 	String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption";
 
+
 	//---- Popup --------------------------------------------------------------
 
+	/**
+	 * Specifies the popup border corner radius if the component is shown in a popup
+	 * or if the component is the owner of another component that is shown in a popup.
+	 * <p>
+	 * Note that this is not available on all platforms since it requires special support.
+	 * Supported platforms:
+	 * <p>
+	 * <strong>Windows 11</strong> (x86 or x86_64): Only two corner radiuses are supported
+	 * by the OS: {@code DWMWCP_ROUND} is 8px and {@code DWMWCP_ROUNDSMALL} is 4px.
+	 * If this value is {@code 1 - 4}, then {@code DWMWCP_ROUNDSMALL} is used.
+	 * If it is {@code >= 5}, then {@code DWMWCP_ROUND} is used.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
+	 * <strong>Value type</strong> {@link java.lang.Integer}<br>
+	 *
+	 * @since 3.1
+	 */
+	String POPUP_BORDER_CORNER_RADIUS = "Popup.borderCornerRadius";
+
 	/**
 	 * Specifies whether a drop shadow is painted if the component is shown in a popup
 	 * or if the component is the owner of another component that is shown in a popup.
@@ -286,6 +309,7 @@ public interface FlatClientProperties
 	 */
 	String POPUP_FORCE_HEAVY_WEIGHT = "Popup.forceHeavyWeight";
 
+
 	//---- JProgressBar -------------------------------------------------------
 
 	/**
@@ -304,6 +328,7 @@ public interface FlatClientProperties
 	 */
 	String PROGRESS_BAR_SQUARE = "JProgressBar.square";
 
+
 	//---- JRootPane ----------------------------------------------------------
 
 	/**
@@ -346,7 +371,7 @@ public interface FlatClientProperties
 
 	/**
 	 * Specifies whether the window icon should be shown in the window title bar
-	 * (requires enabled window decorations).
+	 * (requires enabled window decorations). Default is UI property {@code TitlePane.showIcon}.
 	 * <p>
 	 * Setting this shows/hides the windows icon
 	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
@@ -362,6 +387,62 @@ public interface FlatClientProperties
 	 */
 	String TITLE_BAR_SHOW_ICON = "JRootPane.titleBarShowIcon";
 
+	/**
+	 * Specifies whether the window title should be shown in the window title bar
+	 * (requires enabled window decorations). Default is {@code true}.
+	 * <p>
+	 * Setting this shows/hides the windows title
+	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3
+	 */
+	String TITLE_BAR_SHOW_TITLE = "JRootPane.titleBarShowTitle";
+
+	/**
+	 * Specifies whether the "iconfify" button should be shown in the window title bar
+	 * (requires enabled window decorations). Default is {@code true}.
+	 * <p>
+	 * Setting this shows/hides the "iconfify" button
+	 * for the {@code JFrame} that contains the root pane.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3
+	 */
+	String TITLE_BAR_SHOW_ICONIFFY = "JRootPane.titleBarShowIconify";
+
+	/**
+	 * Specifies whether the "maximize/restore" button should be shown in the window title bar
+	 * (requires enabled window decorations). Default is {@code true}.
+	 * <p>
+	 * Setting this shows/hides the "maximize/restore" button
+	 * for the {@code JFrame} that contains the root pane.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3
+	 */
+	String TITLE_BAR_SHOW_MAXIMIZE = "JRootPane.titleBarShowMaximize";
+
+	/**
+	 * Specifies whether the "close" button should be shown in the window title bar
+	 * (requires enabled window decorations). Default is {@code true}.
+	 * <p>
+	 * Setting this shows/hides the "close" button
+	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3
+	 */
+	String TITLE_BAR_SHOW_CLOSE = "JRootPane.titleBarShowClose";
+
 	/**
 	 * Background color of window title bar (requires enabled window decorations).
 	 * <p>
@@ -386,6 +467,48 @@ public interface FlatClientProperties
 	 */
 	String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground";
 
+	/**
+	 * Specifies whether the glass pane should have full height and overlap the title bar,
+	 * if FlatLaf window decorations are enabled. Default is {@code false}.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3.1
+	 */
+	String GLASS_PANE_FULL_HEIGHT = "JRootPane.glassPaneFullHeight";
+
+	/**
+	 * Specifies the style of the window title bar.
+	 * Besides the default title bar style, you can use a Utility-style title bar,
+	 * which is smaller than the default title bar.
+	 * <p>
+	 * On Windows 10/11, this requires FlatLaf window decorations.
+	 * On macOS, Java supports this out of the box.
+	 * <p>
+	 * Note that this client property must be set before the window becomes displayable.
+	 * Otherwise an {@link IllegalComponentStateException} is thrown.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}<br>
+	 * <strong>Allowed Values</strong>
+	 *     {@link #WINDOW_STYLE_SMALL}
+	 *
+	 * @since 3.2
+	 */
+	String WINDOW_STYLE = "Window.style";
+
+	/**
+	 * The window has Utility-style title bar, which is smaller than default title bar.
+	 * <p>
+	 * This is the same as using {@link Window#setType}( {@link Window.Type#UTILITY} ).
+	 *
+	 * @see #WINDOW_STYLE
+	 * @since 3.2
+	 */
+	String WINDOW_STYLE_SMALL = "small";
+
+
 	//---- JScrollBar / JScrollPane -------------------------------------------
 
 	/**
@@ -404,6 +527,7 @@ public interface FlatClientProperties
 	 */
 	String SCROLL_PANE_SMOOTH_SCROLLING = "JScrollPane.smoothScrolling";
 
+
 	//---- JSplitPane ---------------------------------------------------------
 
 	/**
@@ -438,6 +562,7 @@ public interface FlatClientProperties
 	 */
 	String SPLIT_PANE_EXPANDABLE_SIDE_RIGHT = "right";
 
+
 	//---- JTabbedPane --------------------------------------------------------
 
 	/**
@@ -833,6 +958,7 @@ public interface FlatClientProperties
 	 */
 	String TABBED_PANE_TRAILING_COMPONENT = "JTabbedPane.trailingComponent";
 
+
 	//---- JTextField ---------------------------------------------------------
 
 	/**
@@ -1002,6 +1128,7 @@ public interface FlatClientProperties
 	 */
 	String TEXT_FIELD_CLEAR_CALLBACK = "JTextField.clearCallback";
 
+
 	//---- JToggleButton ------------------------------------------------------
 
 	/**
@@ -1043,6 +1170,7 @@ public interface FlatClientProperties
 	 */
 	String TAB_BUTTON_SELECTED_BACKGROUND = "JToggleButton.tab.selectedBackground";
 
+
 	//---- JTree --------------------------------------------------------------
 
 	/**
@@ -1062,6 +1190,7 @@ public interface FlatClientProperties
 	 */
 	String TREE_PAINT_SELECTION = "JTree.paintSelection";
 
+
 	//---- helper methods -----------------------------------------------------
 
 	/**

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

@@ -50,7 +50,8 @@ class FlatInputMaps
 		}
 
 		modifyInputMap( defaults, "ComboBox.ancestorInputMap",
-			"SPACE", "spacePopup",
+// Space key still shows popup, but from FlatComboBoxUI.FlatKeySelectionManager
+//			"SPACE", "spacePopup",
 
 			"UP", mac( "selectPrevious2", "selectPrevious" ),
 			"DOWN", mac( "selectNext2", "selectNext" ),

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

@@ -71,6 +71,7 @@ import javax.swing.plaf.FontUIResource;
 import javax.swing.plaf.IconUIResource;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicLookAndFeel;
+import javax.swing.plaf.metal.MetalLookAndFeel;
 import javax.swing.text.StyleContext;
 import javax.swing.text.html.HTMLEditorKit;
 import com.formdev.flatlaf.ui.FlatNativeWindowBorder;
@@ -78,6 +79,7 @@ import com.formdev.flatlaf.ui.FlatPopupFactory;
 import com.formdev.flatlaf.ui.FlatRootPaneUI;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.FontUtils;
 import com.formdev.flatlaf.util.GrayFilter;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.MultiResolutionImageSupport;
@@ -98,6 +100,7 @@ public abstract class FlatLaf
 	private static List<Object> customDefaultsSources;
 	private static Map<String, String> globalExtraDefaults;
 	private Map<String, String> extraDefaults;
+	private static Function<String, Color> systemColorGetter;
 
 	private String desktopPropertyName;
 	private String desktopPropertyName2;
@@ -113,6 +116,11 @@ public abstract class FlatLaf
 	private Consumer<UIDefaults> postInitialization;
 	private List<Function<Object, Object>> uiDefaultsGetters;
 
+	private static String preferredFontFamily;
+	private static String preferredLightFontFamily;
+	private static String preferredSemiboldFontFamily;
+	private static String preferredMonospacedFontFamily;
+
 	/**
 	 * Sets the application look and feel to the given LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
@@ -384,7 +392,7 @@ public abstract class FlatLaf
 				Method m = UIManager.class.getMethod( "createLookAndFeel", String.class );
 				aquaLaf = (BasicLookAndFeel) m.invoke( null, "Mac OS X" );
 			} else
-				aquaLaf = (BasicLookAndFeel) Class.forName( aquaLafClassName ).getDeclaredConstructor().newInstance();
+				aquaLaf = Class.forName( aquaLafClassName ).asSubclass( BasicLookAndFeel.class ).getDeclaredConstructor().newInstance();
 		} catch( Exception ex ) {
 			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to initialize Aqua look and feel '" + aquaLafClassName + "'.", ex );
 			throw new IllegalStateException();
@@ -536,7 +544,7 @@ public abstract class FlatLaf
 		// which can happen in applications that use some plugin system
 		// and load FlatLaf in a plugin that uses its own classloader.
 		// (e.g. Apache NetBeans)
-		if( defaults.get( "FileChooser.fileNameHeaderText" ) != null )
+		if( defaults.get( "TabbedPane.moreTabsButtonToolTipText" ) != null )
 			return;
 
 		// load FlatLaf resource bundle and add content to defaults
@@ -574,10 +582,13 @@ public abstract class FlatLaf
 		Object activeFont = new ActiveFont( null, null, -1, 0, 0, 0, 0 );
 
 		// override fonts
+		List<String> fontKeys = new ArrayList<>( 50 );
 		for( Object key : defaults.keySet() ) {
 			if( key instanceof String && (((String)key).endsWith( ".font" ) || ((String)key).endsWith( "Font" )) )
-				defaults.put( key, activeFont );
+				fontKeys.add( (String) key );
 		}
+		for( String key : fontKeys )
+			defaults.put( key, activeFont );
 
 		// add fonts that are not set in BasicLookAndFeel
 		defaults.put( "RootPane.font", activeFont );
@@ -630,6 +641,13 @@ public abstract class FlatLaf
 		if( uiFont == null )
 			uiFont = createCompositeFont( Font.SANS_SERIF, Font.PLAIN, 12 );
 
+		// use preferred font family (if specified)
+		if( preferredFontFamily != null ) {
+			FontUIResource preferredFont = createCompositeFont( preferredFontFamily, uiFont.getStyle(), uiFont.getSize() );
+			if( !ActiveFont.isFallbackFont( preferredFont ) || ActiveFont.isDialogFamily( preferredFontFamily ) )
+				uiFont = preferredFont;
+		}
+
 		// get/remove "defaultFont" from defaults if set in properties files
 		// (use remove() to avoid that ActiveFont.createValue() gets invoked)
 		Object defaultFont = defaults.remove( "defaultFont" );
@@ -650,6 +668,9 @@ public abstract class FlatLaf
 	}
 
 	static FontUIResource createCompositeFont( String family, int style, int size ) {
+		// load lazy font family
+		FontUtils.loadFontFamily( family );
+
 		// using StyleContext.getFont() here because it uses
 		// sun.font.FontUtilities.getCompositeFontUIResource()
 		// and creates a composite font that is able to display all Unicode characters
@@ -897,14 +918,14 @@ public abstract class FlatLaf
 	 * E.g. using {@link UIManager#setLookAndFeel(LookAndFeel)} or {@link #setup(LookAndFeel)}.
 	 * <p>
 	 * The global extra defaults are useful for smaller additional defaults that may change.
-	 * E.g. accent color. Otherwise, FlatLaf properties files should be used.
+	 * Otherwise, FlatLaf properties files should be used.
 	 * See {@link #registerCustomDefaultsSource(String)}.
 	 * <p>
 	 * The keys and values are strings in same format as in FlatLaf properties files.
 	 * <p>
-	 * Sample that setups "FlatLaf Light" theme with red accent color:
+	 * Sample that setups "FlatLaf Light" theme with white background color:
 	 * <pre>{@code
-	 * FlatLaf.setGlobalExtraDefaults( Collections.singletonMap( "@accentColor", "#f00" ) );
+	 * FlatLaf.setGlobalExtraDefaults( Collections.singletonMap( "@background", "#fff" ) );
 	 * FlatLightLaf.setup();
 	 * }</pre>
 	 *
@@ -929,15 +950,15 @@ public abstract class FlatLaf
 	 * E.g. using {@link UIManager#setLookAndFeel(LookAndFeel)} or {@link #setup(LookAndFeel)}.
 	 * <p>
 	 * The extra defaults are useful for smaller additional defaults that may change.
-	 * E.g. accent color. Otherwise, FlatLaf properties files should be used.
+	 * Otherwise, FlatLaf properties files should be used.
 	 * See {@link #registerCustomDefaultsSource(String)}.
 	 * <p>
 	 * The keys and values are strings in same format as in FlatLaf properties files.
 	 * <p>
-	 * Sample that setups "FlatLaf Light" theme with red accent color:
+	 * Sample that setups "FlatLaf Light" theme with white background color:
 	 * <pre>{@code
 	 * FlatLaf laf = new FlatLightLaf();
-	 * laf.setExtraDefaults( Collections.singletonMap( "@accentColor", "#f00" ) );
+	 * laf.setExtraDefaults( Collections.singletonMap( "@background", "#fff" ) );
 	 * FlatLaf.setup( laf );
 	 * }</pre>
 	 *
@@ -979,6 +1000,36 @@ public abstract class FlatLaf
 		return val;
 	}
 
+	/**
+	 * Returns the system color getter function, or {@code null}.
+	 *
+	 * @since 3
+	 */
+	public static Function<String, Color> getSystemColorGetter() {
+		return systemColorGetter;
+	}
+
+	/**
+	 * Sets a system color getter function that is invoked when function
+	 * {@code systemColor()} is used in FlatLaf properties files.
+	 * <p>
+	 * The name of the system color is passed as parameter to the function.
+	 * The function should return {@code null} for unknown system colors.
+	 * <p>
+	 * Can be used to change the accent color:
+	 * <pre>{@code
+	 * FlatLaf.setSystemColorGetter( name -> {
+	 *     return name.equals( "accent" ) ? Color.red : null;
+	 * } );
+	 * FlatLightLaf.setup();
+	 * }</pre>
+	 *
+	 * @since 3
+	 */
+	public static void setSystemColorGetter( Function<String, Color> systemColorGetter ) {
+		FlatLaf.systemColorGetter = systemColorGetter;
+	}
+
 	private static void reSetLookAndFeel() {
 		EventQueue.invokeLater( () -> {
 			LookAndFeel lookAndFeel = UIManager.getLookAndFeel();
@@ -1292,31 +1343,125 @@ public abstract class FlatLaf
 	private static boolean getUIMethodInitialized;
 	private static MethodHandle getUIMethod;
 
+	/**
+	 * Returns the preferred font family to be used for (nearly) all fonts; or {@code null}.
+	 *
+	 * @since 3
+	 */
+	public static String getPreferredFontFamily() {
+		return preferredFontFamily;
+	}
+
+	/**
+	 * Sets the preferred font family to be used for (nearly) all fonts.
+	 * <p>
+	 * <strong>Note</strong>: This must be invoked <strong>before</strong> setting
+	 * the application look and feel.
+	 *
+	 * @since 3
+	 */
+	public static void setPreferredFontFamily( String preferredFontFamily ) {
+		FlatLaf.preferredFontFamily = preferredFontFamily;
+	}
+
+	/**
+	 * Returns the preferred font family to be used for "light" fonts; or {@code null}.
+	 *
+	 * @since 3
+	 */
+	public static String getPreferredLightFontFamily() {
+		return preferredLightFontFamily;
+	}
+
+	/**
+	 * Sets the preferred font family to be used for "light" fonts.
+	 * <p>
+	 * <strong>Note</strong>: This must be invoked <strong>before</strong> setting
+	 * the application look and feel.
+	 *
+	 * @since 3
+	 */
+	public static void setPreferredLightFontFamily( String preferredLightFontFamily ) {
+		FlatLaf.preferredLightFontFamily = preferredLightFontFamily;
+	}
+
+	/**
+	 * Returns the preferred font family to be used for "semibold" fonts; or {@code null}.
+	 *
+	 * @since 3
+	 */
+	public static String getPreferredSemiboldFontFamily() {
+		return preferredSemiboldFontFamily;
+	}
+
+	/**
+	 * Sets the preferred font family to be used for "semibold" fonts.
+	 * <p>
+	 * <strong>Note</strong>: This must be invoked <strong>before</strong> setting
+	 * the application look and feel.
+	 *
+	 * @since 3
+	 */
+	public static void setPreferredSemiboldFontFamily( String preferredSemiboldFontFamily ) {
+		FlatLaf.preferredSemiboldFontFamily = preferredSemiboldFontFamily;
+	}
+
+	/**
+	 * Returns the preferred font family to be used for monospaced fonts; or {@code null}.
+	 *
+	 * @since 3
+	 */
+	public static String getPreferredMonospacedFontFamily() {
+		return preferredMonospacedFontFamily;
+	}
+
+	/**
+	 * Sets the preferred font family to be used for monospaced fonts.
+	 * <p>
+	 * <strong>Note</strong>: This must be invoked <strong>before</strong> setting
+	 * the application look and feel.
+	 *
+	 * @since 3
+	 */
+	public static void setPreferredMonospacedFontFamily( String preferredMonospacedFontFamily ) {
+		FlatLaf.preferredMonospacedFontFamily = preferredMonospacedFontFamily;
+	}
+
 	//---- class FlatUIDefaults -----------------------------------------------
 
 	private class FlatUIDefaults
 		extends UIDefaults
 	{
+		private UIDefaults metalDefaults;
+
 		FlatUIDefaults( int initialCapacity, float loadFactor ) {
 			super( initialCapacity, loadFactor );
 		}
 
 		@Override
 		public Object get( Object key ) {
-			Object value = getValue( key );
-			return (value != null) ? (value != NULL_VALUE ? value : null) : super.get( key );
+			return get( key, null );
 		}
 
 		@Override
 		public Object get( Object key, Locale l ) {
-			Object value = getValue( key );
-			return (value != null) ? (value != NULL_VALUE ? value : null) : super.get( key, l );
+			Object value = getFromUIDefaultsGetters( key );
+			if( value != null )
+				return (value != NULL_VALUE) ? value : null;
+
+			value = super.get( key, l );
+			if( value != null )
+				return value;
+
+			// get file chooser texts from Metal
+			return (key instanceof String && ((String)key).startsWith( "FileChooser." ))
+				? getFromMetal( (String) key, l )
+				: null;
 		}
 
-		private Object getValue( Object key ) {
+		private Object getFromUIDefaultsGetters( Object key ) {
 			// use local variable for getters to avoid potential multi-threading issues
 			List<Function<Object, Object>> uiDefaultsGetters = FlatLaf.this.uiDefaultsGetters;
-
 			if( uiDefaultsGetters == null )
 				return null;
 
@@ -1328,6 +1473,22 @@ public abstract class FlatLaf
 
 			return null;
 		}
+
+		private synchronized Object getFromMetal( String key, Locale l ) {
+			if( metalDefaults == null ) {
+				metalDefaults = new MetalLookAndFeel() {
+					// avoid unnecessary initialization
+					@Override protected void initClassDefaults( UIDefaults table ) {}
+					@Override protected void initSystemColorDefaults( UIDefaults table ) {}
+				}.getDefaults();
+
+				// empty not needed defaults (to save memory) because we're only interested
+				// in resource bundle strings, which are stored in another internal map
+				metalDefaults.clear();
+			}
+
+			return metalDefaults.get( key, l );
+		}
 	}
 
 	//---- class ActiveFont ---------------------------------------------------
@@ -1410,7 +1571,7 @@ public abstract class FlatLaf
 			int newStyle = (style != -1)
 				? style
 				: (styleChange != 0)
-					? baseStyle & ~((styleChange >> 16) & 0xffff) | (styleChange & 0xffff)
+					? (baseStyle & ~((styleChange >> 16) & 0xffff)) | (styleChange & 0xffff)
 					: baseStyle;
 
 			// new size
@@ -1426,9 +1587,16 @@ public abstract class FlatLaf
 
 			// create font for family
 			if( families != null && !families.isEmpty() ) {
+				String preferredFamily = preferredFamily( families );
+				if( preferredFamily != null ) {
+					Font font = createCompositeFont( preferredFamily, newStyle, newSize );
+					if( !isFallbackFont( font ) || isDialogFamily( preferredFamily ) )
+						return toUIResource( font );
+				}
+
 				for( String family : families ) {
 					Font font = createCompositeFont( family, newStyle, newSize );
-					if( !isFallbackFont( font ) || family.equalsIgnoreCase( Font.DIALOG ) )
+					if( !isFallbackFont( font ) || isDialogFamily( family ) )
 						return toUIResource( font );
 				}
 			}
@@ -1457,9 +1625,26 @@ public abstract class FlatLaf
 				: new FontUIResource( font );
 		}
 
-		private boolean isFallbackFont( Font font ) {
+		private static boolean isFallbackFont( Font font ) {
 			return Font.DIALOG.equalsIgnoreCase( font.getFamily() );
 		}
+
+		private static boolean isDialogFamily( String family ) {
+			return family.equalsIgnoreCase( Font.DIALOG );
+		}
+
+		private static String preferredFamily( List<String> families ) {
+			for( String family : families ) {
+				family = family.toLowerCase( Locale.ENGLISH );
+				if( family.endsWith( " light" ) || family.endsWith( "-thin" ) )
+					return preferredLightFontFamily;
+				if( family.endsWith( " semibold" ) || family.endsWith( "-medium" ) )
+					return preferredSemiboldFontFamily;
+				if( family.equals( "monospaced" ) )
+					return preferredMonospacedFontFamily;
+			}
+			return null;
+		}
 	}
 
 	//---- class ImageIconUIResource ------------------------------------------

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

@@ -21,6 +21,7 @@ import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
+import java.util.Locale;
 import java.util.Properties;
 
 /**
@@ -96,7 +97,7 @@ public class FlatPropertiesLaf
 	protected ArrayList<Class<?>> getLafClassesForDefaultsLoading() {
 		ArrayList<Class<?>> lafClasses = new ArrayList<>();
 		lafClasses.add( FlatLaf.class );
-		switch( baseTheme.toLowerCase() ) {
+		switch( baseTheme.toLowerCase( Locale.ENGLISH ) ) {
 			default:
 			case "light":
 				lafClasses.add( FlatLightLaf.class );

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

@@ -150,14 +150,38 @@ public interface FlatSystemProperties
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> {@code true}
+	 *
 	 * @since 2.5
 	 */
 	String UPDATE_UI_ON_SYSTEM_FONT_CHANGE = "flatlaf.updateUIOnSystemFontChange";
 
 	/**
-	 * Specifies a directory in which the native FlatLaf library have been extracted.
+	 * Specifies whether FlatLaf native library should be used.
+	 * <p>
+	 * Setting this to {@code false} disables loading native library,
+	 * which also disables some features that depend on the native library.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 *
+	 * @since 3.2
+	 */
+	String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary";
+
+	/**
+	 * Specifies a directory in which the native FlatLaf libraries have been extracted.
 	 * The path can be absolute or relative to current application working directory.
 	 * This can be used to avoid extraction of the native libraries to the temporary directory at runtime.
+	 * <p>
+	 * If the value is {@code "system"}, then {@link System#loadLibrary(String)} is
+	 * used to load the native library.
+	 * Searches for the native library in classloader of caller
+	 * (using {@link ClassLoader#findLibrary(String)}) and in paths specified
+	 * in system properties {@code sun.boot.library.path} and {@code java.library.path}.
+	 * (supported since FlatLaf 2.6)
+	 * <p>
+	 * If the native library can not loaded from the given path (or via {@link System#loadLibrary(String)}),
+	 * then the embedded native library is extracted to the temporary directory and loaded from there.
 	 *
 	 * @since 2
 	 */

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

@@ -23,13 +23,17 @@ import java.io.InputStreamReader;
 import java.io.Reader;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.Map.Entry;
 import javax.swing.UIDefaults;
 import javax.swing.plaf.ColorUIResource;
 import com.formdev.flatlaf.json.Json;
@@ -61,9 +65,9 @@ public class IntelliJTheme
 
 	private final boolean isMaterialUILite;
 
-	private final Map<String, String> colors;
-	private final Map<String, Object> ui;
-	private final Map<String, Object> icons;
+	private Map<String, String> colors;
+	private Map<String, Object> ui;
+	private Map<String, Object> icons;
 
 	private Map<String, ColorUIResource> namedColors = Collections.emptyMap();
 
@@ -196,8 +200,9 @@ public class IntelliJTheme
 		defaults.put( "HelpButton.focusedBackground", defaults.get( "Button.focusedBackground" ) );
 
 		// IDEA uses TextField.background for editable ComboBox and Spinner
-		defaults.put( "ComboBox.editableBackground", defaults.get( "TextField.background" ) );
-		defaults.put( "Spinner.background", defaults.get( "TextField.background" ) );
+		Object textFieldBackground = get( defaults, themeSpecificDefaults, "TextField.background" );
+		defaults.put( "ComboBox.editableBackground", textFieldBackground );
+		defaults.put( "Spinner.background", textFieldBackground );
 
 		// Spinner arrow button always has same colors as ComboBox arrow button
 		defaults.put( "Spinner.buttonBackground", defaults.get( "ComboBox.buttonEditableBackground" ) );
@@ -205,22 +210,41 @@ public class IntelliJTheme
 		defaults.put( "Spinner.buttonDisabledArrowColor", defaults.get( "ComboBox.buttonDisabledArrowColor" ) );
 
 		// some themes specify colors for TextField.background, but forget to specify it for other components
-		// (probably because those components are not used in IntelliJ)
-		if( uiKeys.contains( "TextField.background" ) ) {
-			Object textFieldBackground = defaults.get( "TextField.background" );
-			if( !uiKeys.contains( "FormattedTextField.background" ) )
-				defaults.put( "FormattedTextField.background", textFieldBackground );
-			if( !uiKeys.contains( "PasswordField.background" ) )
-				defaults.put( "PasswordField.background", textFieldBackground );
-			if( !uiKeys.contains( "EditorPane.background" ) )
-				defaults.put( "EditorPane.background", textFieldBackground );
-			if( !uiKeys.contains( "TextArea.background" ) )
-				defaults.put( "TextArea.background", textFieldBackground );
-			if( !uiKeys.contains( "TextPane.background" ) )
-				defaults.put( "TextPane.background", textFieldBackground );
-			if( !uiKeys.contains( "Spinner.background" ) )
-				defaults.put( "Spinner.background", textFieldBackground );
-		}
+		// (probably because those components are not used in IntelliJ IDEA)
+		putAll( defaults, textFieldBackground,
+			"EditorPane.background",
+			"FormattedTextField.background",
+			"PasswordField.background",
+			"TextArea.background",
+			"TextPane.background"
+		);
+		putAll( defaults, get( defaults, themeSpecificDefaults, "TextField.selectionBackground" ),
+			"EditorPane.selectionBackground",
+			"FormattedTextField.selectionBackground",
+			"PasswordField.selectionBackground",
+			"TextArea.selectionBackground",
+			"TextPane.selectionBackground"
+		);
+		putAll( defaults, get( defaults, themeSpecificDefaults, "TextField.selectionForeground" ),
+			"EditorPane.selectionForeground",
+			"FormattedTextField.selectionForeground",
+			"PasswordField.selectionForeground",
+			"TextArea.selectionForeground",
+			"TextPane.selectionForeground"
+		);
+
+		// fix disabled and not-editable backgrounds for text components, combobox and spinner
+		// (IntelliJ IDEA does not use those colors; instead it used background color of parent)
+		putAll( defaults, panelBackground,
+			"ComboBox.disabledBackground",
+			"EditorPane.disabledBackground", "EditorPane.inactiveBackground",
+			"FormattedTextField.disabledBackground", "FormattedTextField.inactiveBackground",
+			"PasswordField.disabledBackground", "PasswordField.inactiveBackground",
+			"Spinner.disabledBackground",
+			"TextArea.disabledBackground", "TextArea.inactiveBackground",
+			"TextField.disabledBackground", "TextField.inactiveBackground",
+			"TextPane.disabledBackground", "TextPane.inactiveBackground"
+		);
 
 		// fix ToggleButton
 		if( !uiKeys.contains( "ToggleButton.startBackground" ) && !uiKeys.contains( "*.startBackground" ) )
@@ -247,6 +271,33 @@ public class IntelliJTheme
 		if( rowHeight > 22 )
 			defaults.put( "Tree.rowHeight", 22 );
 
+		// get (and remove) theme specific wildcard replacements, which override all other defaults that end with same suffix
+		HashMap<String, Object> wildcards = new HashMap<>();
+		Iterator<Entry<Object, Object>> it = themeSpecificDefaults.entrySet().iterator();
+		while( it.hasNext() ) {
+			Entry<Object, Object> e = it.next();
+			String key = (String) e.getKey();
+			if( key.startsWith( "*." ) ) {
+				wildcards.put( key.substring( "*.".length() ), e.getValue() );
+				it.remove();
+			}
+		}
+
+		// override UI defaults with theme specific wildcard replacements
+		if( !wildcards.isEmpty() ) {
+			for( Object key : defaults.keySet().toArray() ) {
+				int dot;
+				if( !(key instanceof String) ||
+					(dot = ((String)key).lastIndexOf( '.' )) < 0 )
+				  continue;
+
+				String wildcardKey = ((String)key).substring( dot + 1 );
+				Object wildcardValue = wildcards.get( wildcardKey );
+				if( wildcardValue != null )
+					defaults.put( key, wildcardValue );
+			}
+		}
+
 		// apply theme specific UI defaults at the end to allow overwriting
 		for( Map.Entry<Object, Object> e : themeSpecificDefaults.entrySet() ) {
 			Object key = e.getKey();
@@ -261,6 +312,20 @@ public class IntelliJTheme
 
 			defaults.put( key, value );
 		}
+
+		// let Java release memory
+		colors = null;
+		ui = null;
+		icons = null;
+	}
+
+	private Object get( UIDefaults defaults, Map<Object, Object> themeSpecificDefaults, String key ) {
+		return themeSpecificDefaults.getOrDefault( key, defaults.get( key ) );
+	}
+
+	private void putAll( UIDefaults defaults, Object value, String... keys ) {
+		for( String key : keys )
+			defaults.put( key, value );
 	}
 
 	private Map<Object, Object> removeThemeSpecificDefaults( UIDefaults defaults ) {
@@ -302,7 +367,7 @@ public class IntelliJTheme
 
 		for( Map.Entry<String, String> e : colors.entrySet() ) {
 			String value = e.getValue();
-			ColorUIResource color = UIDefaultsLoader.parseColor( value );
+			ColorUIResource color = parseColor( value );
 			if( color != null ) {
 				String key = e.getKey();
 				namedColors.put( key, color );
@@ -334,17 +399,30 @@ public class IntelliJTheme
 			if( "".equals( value ) )
 				return; // ignore empty value
 
-			uiKeys.add( key );
-
-			// fix ComboBox size and Spinner border in all Material UI Lite themes
-			if( isMaterialUILite && (key.equals( "ComboBox.padding" ) || key.equals( "Spinner.border" )) )
-				return; // ignore
+			// ignore some properties that affect sizes
+			if( key.endsWith( ".border" ) ||
+				key.endsWith( ".rowHeight" ) ||
+				key.equals( "ComboBox.padding" ) ||
+				key.equals( "Spinner.padding" ) ||
+				key.equals( "Tree.leftChildIndent" ) ||
+				key.equals( "Tree.rightChildIndent" ) )
+			  return; // ignore
 
 			// map keys
 			key = uiKeyMapping.getOrDefault( key, key );
 			if( key.isEmpty() )
 				return; // ignore key
 
+			// exclude properties
+			int dot = key.indexOf( '.' );
+			if( dot > 0 && uiKeyExcludes.contains( key.substring( 0, dot + 1 ) ) )
+				return;
+
+			if( uiKeyDoNotOverride.contains( key ) && uiKeys.contains( key ) )
+				return;
+
+			uiKeys.add( key );
+
 			String valueStr = value.toString();
 
 			// map named colors
@@ -390,7 +468,8 @@ public class IntelliJTheme
 				// replace all values in UI defaults that match the wildcard key
 				for( Object k : defaultsKeysCache ) {
 					if( k.equals( "Desktop.background" ) ||
-						k.equals( "DesktopIcon.background" ) )
+						k.equals( "DesktopIcon.background" ) ||
+						k.equals( "TabbedPane.focusColor" ) )
 					  continue;
 
 					if( k instanceof String ) {
@@ -448,12 +527,20 @@ public class IntelliJTheme
 		ColorUIResource color = namedColors.get( value );
 
 		// parse color
-		return (color != null) ? color : UIDefaultsLoader.parseColor( value );
+		return (color != null) ? color : parseColor( value );
+	}
+
+	private ColorUIResource parseColor( String value ) {
+		try {
+			return UIDefaultsLoader.parseColor( value );
+		} catch( IllegalArgumentException ex ) {
+			return null;
+		}
 	}
 
 	/**
 	 * Because IDEA uses SVGs for check boxes and radio buttons, the colors for
-	 * this two components are specified in "icons > ColorPalette".
+	 * these two components are specified in "icons > ColorPalette".
 	 * FlatLaf uses vector icons and expects colors for the two components in UI defaults.
 	 */
 	private void applyCheckBoxColors( UIDefaults defaults ) {
@@ -473,18 +560,6 @@ public class IntelliJTheme
 			if( !key.startsWith( "Checkbox." ) || !(value instanceof String) )
 				continue;
 
-			if( key.equals( "Checkbox.Background.Default" ) ||
-				key.equals( "Checkbox.Foreground.Selected" ) )
-			{
-				// This two keys do not work correctly in IDEA because they
-				// map SVG color "#ffffff" to another color, but checkBox.svg and
-				// radio.svg (in package com.intellij.ide.ui.laf.icons.intellij)
-				// use "#fff". So use white to get same appearance as in IDEA.
-				value = "#ffffff";
-			}
-
-			String key2 = checkboxDuplicateColors.get( key );
-
 			if( dark )
 				key = StringUtils.removeTrailing( key, ".Dark" );
 
@@ -498,6 +573,7 @@ public class IntelliJTheme
 				if( color != null ) {
 					defaults.put( newKey, color );
 
+					String key2 = checkboxDuplicateColors.get( key + ".Dark");
 					if( key2 != null ) {
 						// When IDEA replaces colors in SVGs it uses color values and not the keys
 						// from com.intellij.ide.ui.UITheme.colorPalette, but there are some keys that
@@ -540,7 +616,7 @@ public class IntelliJTheme
 				// radioFocused.svg and radioSelectedFocused.svg
 				// use opacity=".65" for the border
 				// --> add alpha to focused border colors
-				String[] focusedBorderColorKeys = new String[] {
+				String[] focusedBorderColorKeys = {
 					"CheckBox.icon.focusedBorderColor",
 					"CheckBox.icon.focusedSelectedBorderColor",
 					"CheckBox.icon[filled].focusedBorderColor",
@@ -562,17 +638,59 @@ public class IntelliJTheme
 			defaults.put( destKey, defaults.get( srcKey ) );
 	}
 
+	private static final Set<String> uiKeyExcludes;
+	private static final Set<String> uiKeyDoNotOverride;
 	/** Rename UI default keys (key --> value). */
 	private static final Map<String, String> uiKeyMapping = new HashMap<>();
 	/** Copy UI default keys (value --> key). */
-	private static final Map<String, String> uiKeyCopying = new HashMap<>();
+	private static final Map<String, String> uiKeyCopying = new LinkedHashMap<>();
 	private static final Map<String, String> uiKeyInverseMapping = new HashMap<>();
 	private static final Map<String, String> checkboxKeyMapping = new HashMap<>();
 	private static final Map<String, String> checkboxDuplicateColors = new HashMap<>();
 
 	static {
+		// IntelliJ UI properties that are not used in FlatLaf
+		uiKeyExcludes = new HashSet<>( Arrays.asList(
+			"ActionButton.", "ActionToolbar.", "ActionsList.", "AppInspector.", "AssignedMnemonic.", "Autocomplete.",
+			"AvailableMnemonic.",
+			"BigSpinner.", "Bookmark.", "BookmarkIcon.", "BookmarkMnemonicAssigned.", "BookmarkMnemonicAvailable.",
+			"BookmarkMnemonicCurrent.", "BookmarkMnemonicIcon.", "Borders.", "Breakpoint.",
+			"Canvas.", "CodeWithMe.", "ComboBoxButton.", "CompletionPopup.", "ComplexPopup.", "Content.",
+			"CurrentMnemonic.", "Counter.",
+			"Debugger.", "DebuggerPopup.", "DebuggerTabs.", "DefaultTabs.", "Dialog.", "DialogWrapper.", "DragAndDrop.",
+			"Editor.", "EditorGroupsTabs.", "EditorTabs.",
+			"FileColor.", "FlameGraph.", "Focus.",
+			"Git.", "Github.", "GotItTooltip.", "Group.", "Gutter.", "GutterTooltip.",
+			"HeaderColor.", "HelpTooltip.", "Hg.",
+			"IconBadge.", "InformationHint.", "InplaceRefactoringPopup.",
+			"Lesson.", "Link.", "LiveIndicator.",
+			"MainMenu.", "MainToolbar.", "MemoryIndicator.", "MlModelBinding.", "MnemonicIcon.",
+			"NavBar.", "NewClass.", "NewPSD.", "Notification.", "Notifications.", "NotificationsToolwindow.",
+			"OnePixelDivider.", "OptionButton.", "Outline.",
+			"ParameterInfo.", "Plugins.", "ProgressIcon.", "PsiViewer.",
+			"ReviewList.", "RunWidget.",
+			"ScreenView.", "SearchEverywhere.", "SearchFieldWithExtension.", "SearchMatch.", "SearchOption.",
+			"SearchResults.", "SegmentedButton.", "Settings.", "SidePanel.", "Space.", "SpeedSearch.", "StateWidget.",
+			"StatusBar.",
+			"Tag.", "TipOfTheDay.", "ToolbarComboWidget.", "ToolWindow.",
+			"UIDesigner.", "UnattendedHostStatus.",
+			"ValidationTooltip.", "VersionControl.",
+			"WelcomeScreen.",
+
+			// lower case
+			"darcula.", "dropArea.", "icons.", "intellijlaf.", "macOSWindow.", "material.", "tooltips.",
+
+			// possible typos in .theme.json files
+			"Checkbox.", "Toolbar.", "Tooltip.", "UiDesigner.", "link."
+		) );
+
+		uiKeyDoNotOverride = new HashSet<>( Arrays.asList(
+			"TabbedPane.selectedForeground"
+		) );
+
 		// ComboBox
 		uiKeyMapping.put( "ComboBox.background",                        "" ); // ignore
+		uiKeyMapping.put( "ComboBox.buttonBackground",                  "" ); // ignore
 		uiKeyMapping.put( "ComboBox.nonEditableBackground",             "ComboBox.background" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.background",            "ComboBox.buttonEditableBackground" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.disabledIconColor",     "ComboBox.buttonDisabledArrowColor" );
@@ -630,9 +748,9 @@ public class IntelliJTheme
 		uiKeyCopying.put( "Spinner.buttonDisabledSeparatorColor", "Component.disabledBorderColor" );
 
 		// TabbedPane
-		uiKeyCopying.put( "TabbedPane.selectedBackground",     "DefaultTabs.underlinedTabBackground" );
-		uiKeyCopying.put( "TabbedPane.selectedForeground",     "DefaultTabs.underlinedTabForeground" );
-		uiKeyCopying.put( "TabbedPane.inactiveUnderlineColor", "DefaultTabs.inactiveUnderlineColor" );
+		uiKeyMapping.put( "DefaultTabs.underlinedTabBackground", "TabbedPane.selectedBackground" );
+		uiKeyMapping.put( "DefaultTabs.underlinedTabForeground", "TabbedPane.selectedForeground" );
+		uiKeyMapping.put( "DefaultTabs.inactiveUnderlineColor",  "TabbedPane.inactiveUnderlineColor" );
 
 		// TitlePane
 		uiKeyCopying.put( "TitlePane.inactiveBackground",     "TitlePane.background" );

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

@@ -23,11 +23,14 @@ import java.awt.GraphicsEnvironment;
 import java.awt.Toolkit;
 import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileReader;
+import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.StringTokenizer;
 import javax.swing.text.StyleContext;
 import com.formdev.flatlaf.util.LoggingFacade;
@@ -68,7 +71,7 @@ class LinuxFontPolicy
 			if( word.endsWith( "," ) )
 				word = word.substring( 0, word.length() - 1 ).trim();
 
-			String lword = word.toLowerCase();
+			String lword = word.toLowerCase( Locale.ENGLISH );
 			if( lword.equals( "italic" ) || lword.equals( "oblique" ) )
 				style |= Font.ITALIC;
 			else if( lword.equals( "bold" ) )
@@ -104,7 +107,7 @@ class LinuxFontPolicy
 			size = 1;
 
 		// handle logical font names
-		String logicalFamily = mapFcName( family.toLowerCase() );
+		String logicalFamily = mapFcName( family.toLowerCase( Locale.ENGLISH ) );
 		if( logicalFamily != null )
 			family = logicalFamily;
 
@@ -143,7 +146,7 @@ class LinuxFontPolicy
 				return createFont( Font.DIALOG, style, size, dsize );
 
 			// check whether last work contains some font weight (e.g. Ultra-Bold or Heavy)
-			String lastWord = family.substring( index + 1 ).toLowerCase();
+			String lastWord = family.substring( index + 1 ).toLowerCase( Locale.ENGLISH );
 			if( lastWord.contains( "bold" ) || lastWord.contains( "heavy" ) || lastWord.contains( "black" ) )
 				style |= Font.BOLD;
 
@@ -257,6 +260,7 @@ class LinuxFontPolicy
 		return createFont( family, style, size, dsize );
 	}
 
+	@SuppressWarnings( "MixedMutabilityReturnType" ) // Error Prone
 	private static List<String> readConfig( String filename ) {
 		File userHome = new File( System.getProperty( "user.home" ) );
 
@@ -277,7 +281,9 @@ class LinuxFontPolicy
 
 		// read config file
 		ArrayList<String> lines = new ArrayList<>( 200 );
-		try( BufferedReader reader = new BufferedReader( new FileReader( file ) ) ) {
+		try( BufferedReader reader = new BufferedReader( new InputStreamReader(
+			new FileInputStream( file ), StandardCharsets.US_ASCII ) ) )
+		{
 			String line;
 			while( (line = reader.readLine()) != null )
 				lines.add( line );

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

@@ -153,7 +153,7 @@ debug*/
 
 		// get invoker screen bounds
 		Component invoker = popup.getInvoker();
-		invokerBounds = (invoker != null)
+		invokerBounds = (invoker != null && invoker.isShowing())
 			? new Rectangle( invoker.getLocationOnScreen(), invoker.getSize() )
 			: null;
 

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

@@ -27,8 +27,12 @@ import java.io.IOException;
 import java.io.InputStream;
 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.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -84,6 +88,7 @@ class UIDefaultsLoader
 
 	private static int parseColorDepth;
 
+	private static Map<String, ColorUIResource> systemColorCache;
 	private static final SoftCache<String, Object> fontCache = new SoftCache<>();
 
 	static void loadDefaultsFromProperties( Class<?> lookAndFeelClass, List<FlatDefaultsAddon> addons,
@@ -105,6 +110,10 @@ class UIDefaultsLoader
 		Properties additionalDefaults, boolean dark, UIDefaults defaults )
 	{
 		try {
+			// temporary cache system colors while loading defaults,
+			// which avoids that system color getter is invoked multiple times
+			systemColorCache = (FlatLaf.getSystemColorGetter() != null) ? new HashMap<>() : null;
+
 			// load core properties files
 			Properties properties = new Properties();
 			for( Class<?> lafClass : lafClasses ) {
@@ -266,8 +275,9 @@ class UIDefaultsLoader
 					continue;
 				}
 
-				String value = resolveValue( (String) e.getValue(), propertiesGetter );
+				String value = (String) e.getValue();
 				try {
+					value = resolveValue( value, propertiesGetter );
 					defaults.put( key, parseValue( key, value, null, null, resolver, addonClassLoaders ) );
 				} catch( RuntimeException ex ) {
 					logParseError( key, value, ex, true );
@@ -276,6 +286,9 @@ class UIDefaultsLoader
 
 			// remember variables in defaults to allow using them in styles
 			defaults.put( KEY_VARIABLES, variables );
+
+			// clear/disable system color cache
+			systemColorCache = null;
 		} catch( IOException ex ) {
 			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to load properties files.", ex );
 		}
@@ -289,7 +302,9 @@ class UIDefaultsLoader
 			LoggingFacade.INSTANCE.logConfig( message, ex );
 	}
 
-	static String resolveValue( String value, Function<String, String> propertiesGetter ) {
+	static String resolveValue( String value, Function<String, String> propertiesGetter )
+		throws IllegalArgumentException
+	{
 		value = value.trim();
 		String value0 = value;
 
@@ -318,7 +333,9 @@ class UIDefaultsLoader
 		return resolveValue( newValue, propertiesGetter );
 	}
 
-	static String resolveValueFromUIManager( String value ) {
+	static String resolveValueFromUIManager( String value )
+		throws IllegalArgumentException
+	{
 		if( value.startsWith( VARIABLE_PREFIX ) ) {
 			@SuppressWarnings( "unchecked" )
 			Map<String, String> variables = (Map<String, String>) UIManager.get( KEY_VARIABLES );
@@ -326,7 +343,7 @@ class UIDefaultsLoader
 			if( newValue == null )
 				throw new IllegalArgumentException( "variable '" + value + "' not found" );
 
-			return newValue;
+			return resolveValueFromUIManager( newValue );
 		}
 
 		if( !value.startsWith( PROPERTY_PREFIX ) )
@@ -340,8 +357,11 @@ class UIDefaultsLoader
 		// convert binary color to string
 		if( newValue instanceof Color ) {
 			Color color = (Color) newValue;
+			int rgb = color.getRGB() & 0xffffff;
 			int alpha = color.getAlpha();
-			return String.format( (alpha != 255) ? "#%06x%02x" : "#%06x", color.getRGB() & 0xffffff, alpha );
+			return (alpha != 255)
+				? String.format( "#%06x%02x", rgb, alpha )
+				: String.format( "#%06x", rgb );
 		}
 
 		throw new IllegalArgumentException( "property value type '" + newValue.getClass().getName() + "' not supported in references" );
@@ -354,12 +374,15 @@ class UIDefaultsLoader
 	private static Map<Class<?>, ValueType> javaValueTypes;
 	private static Map<String, ValueType> knownValueTypes;
 
-	static Object parseValue( String key, String value, Class<?> valueType ) {
+	static Object parseValue( String key, String value, Class<?> valueType )
+		throws IllegalArgumentException
+	{
 		return parseValue( key, value, valueType, null, v -> v, Collections.emptyList() );
 	}
 
 	static Object parseValue( String key, String value, Class<?> javaValueType, ValueType[] resultValueType,
 		Function<String, String> resolver, List<ClassLoader> addonClassLoaders )
+			throws IllegalArgumentException
 	{
 		if( resultValueType == null )
 			resultValueType = tempResultValueType;
@@ -389,7 +412,7 @@ class UIDefaultsLoader
 		if( value.startsWith( "if(" ) && value.endsWith( ")" ) ) {
 			List<String> params = splitFunctionParams( value.substring( 3, value.length() - 1 ), ',' );
 			if( params.size() != 3 )
-				throwMissingParametersException( value );
+				throw newMissingParametersException( value );
 
 			boolean ifCondition = parseCondition( params.get( 0 ), resolver, addonClassLoaders );
 			String ifValue = params.get( ifCondition ? 1 : 2 );
@@ -525,20 +548,20 @@ class UIDefaultsLoader
 			case STRING:		return value;
 			case BOOLEAN:		return parseBoolean( value );
 			case CHARACTER:		return parseCharacter( value );
-			case INTEGER:		return parseInteger( value, true );
-			case INTEGERORFLOAT:return parseIntegerOrFloat( value, true );
-			case FLOAT:			return parseFloat( value, true );
+			case INTEGER:		return parseInteger( value );
+			case INTEGERORFLOAT:return parseIntegerOrFloat( value );
+			case FLOAT:			return parseFloat( value );
 			case BORDER:		return parseBorder( value, resolver, addonClassLoaders );
-			case ICON:			return parseInstance( value, addonClassLoaders );
+			case ICON:			return parseInstance( value, resolver, addonClassLoaders );
 			case INSETS:		return parseInsets( value );
 			case DIMENSION:		return parseDimension( value );
-			case COLOR:			return parseColorOrFunction( value, resolver, true );
+			case COLOR:			return parseColorOrFunction( value, resolver );
 			case FONT:			return parseFont( value );
 			case SCALEDINTEGER:	return parseScaledInteger( value );
 			case SCALEDFLOAT:	return parseScaledFloat( value );
 			case SCALEDINSETS:	return parseScaledInsets( value );
 			case SCALEDDIMENSION:return parseScaledDimension( value );
-			case INSTANCE:		return parseInstance( value, addonClassLoaders );
+			case INSTANCE:		return parseInstance( value, resolver, addonClassLoaders );
 			case CLASS:			return parseClass( value, addonClassLoaders );
 			case GRAYFILTER:	return parseGrayFilter( value );
 			case UNKNOWN:
@@ -550,24 +573,34 @@ class UIDefaultsLoader
 				}
 
 				// colors
-				Object color = parseColorOrFunction( value, resolver, false );
-				if( color != null ) {
-					resultValueType[0] = ValueType.COLOR;
+				if( value.startsWith( "#" ) || value.endsWith( ")" ) ) {
+					Object color = parseColorOrFunction( value, resolver );
+					resultValueType[0] = (color != null) ? ValueType.COLOR : ValueType.NULL;
 					return color;
 				}
 
-				// integer
-				Integer integer = parseInteger( value, false );
-				if( integer != null ) {
-					resultValueType[0] = ValueType.INTEGER;
-					return integer;
-				}
+				// integer or float
+				char firstChar = value.charAt( 0 );
+				if( (firstChar >= '0' && firstChar <= '9') ||
+					firstChar == '-' || firstChar == '+' || firstChar == '.' )
+				{
+					// integer
+					try {
+						Integer integer = parseInteger( value );
+						resultValueType[0] = ValueType.INTEGER;
+						return integer;
+					} catch( NumberFormatException ex ) {
+						// ignore
+					}
 
-				// float
-				Float f = parseFloat( value, false );
-				if( f != null ) {
-					resultValueType[0] = ValueType.FLOAT;
-					return f;
+					// float
+					try {
+						Float f = parseFloat( value );
+						resultValueType[0] = ValueType.FLOAT;
+						return f;
+					} catch( NumberFormatException ex ) {
+						// ignore
+					}
 				}
 
 				// string
@@ -590,16 +623,18 @@ class UIDefaultsLoader
 		}
 	}
 
-	private static Object parseBorder( String value, Function<String, String> resolver, List<ClassLoader> addonClassLoaders ) {
+	private static Object parseBorder( String value, Function<String, String> resolver, List<ClassLoader> addonClassLoaders )
+		throws IllegalArgumentException
+	{
 		if( value.indexOf( ',' ) >= 0 ) {
-			// top,left,bottom,right[,lineColor[,lineThickness[,arc]]]
+			// Syntax: top,left,bottom,right[,lineColor[,lineThickness[,arc]]]
 			List<String> parts = splitFunctionParams( value, ',' );
 			Insets insets = parseInsets( value );
 			ColorUIResource lineColor = (parts.size() >= 5)
-				? (ColorUIResource) parseColorOrFunction( resolver.apply( parts.get( 4 ) ), resolver, true )
+				? (ColorUIResource) parseColorOrFunction( resolver.apply( parts.get( 4 ) ), resolver )
 				: null;
-			float lineThickness = (parts.size() >= 6 && !parts.get( 5 ).isEmpty()) ? parseFloat( parts.get( 5 ), true ) : 1f;
-			int arc = (parts.size() >= 7) ? parseInteger( parts.get( 6 ), true ) : 0;
+			float lineThickness = (parts.size() >= 6 && !parts.get( 5 ).isEmpty()) ? parseFloat( parts.get( 5 ) ) : 1f;
+			int arc = (parts.size() >= 7) ? parseInteger( parts.get( 6 ) ) : 0;
 
 			return (LazyValue) t -> {
 				return (lineColor != null)
@@ -607,13 +642,29 @@ class UIDefaultsLoader
 					: new FlatEmptyBorder( insets );
 			};
 		} else
-			return parseInstance( value, addonClassLoaders );
+			return parseInstance( value, resolver, addonClassLoaders );
 	}
 
-	private static Object parseInstance( String value, List<ClassLoader> addonClassLoaders ) {
+	private static Object parseInstance( String value, Function<String, String> resolver, List<ClassLoader> addonClassLoaders ) {
 		return (LazyValue) t -> {
 			try {
-				return findClass( value, addonClassLoaders ).getDeclaredConstructor().newInstance();
+				if( value.indexOf( ',' ) >= 0 ) {
+					// Syntax: className,param1,param2,...
+					List<String> parts = splitFunctionParams( value, ',' );
+					String className = parts.get( 0 );
+					Class<?> cls = findClass( className, addonClassLoaders );
+
+					Constructor<?>[] constructors = cls.getDeclaredConstructors();
+					Object result = invokeConstructorOrStaticMethod( constructors, parts, resolver );
+					if( result != null )
+						return result;
+
+					LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to instantiate '" + className
+						+ "': no constructor found for parameters '"
+						+ value.substring( value.indexOf( ',' + 1 ) ) + "'.", null );
+					return null;
+				} else
+					return findClass( value, addonClassLoaders ).getDeclaredConstructor().newInstance();
 			} catch( Exception ex ) {
 				LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to instantiate '" + value + "'.", ex );
 				return null;
@@ -650,7 +701,9 @@ class UIDefaultsLoader
 		}
 	}
 
-	private static Insets parseInsets( String value ) {
+	private static Insets parseInsets( String value )
+		throws IllegalArgumentException
+	{
 		List<String> numbers = StringUtils.split( value, ',', true, false );
 		try {
 			return new InsetsUIResource(
@@ -663,7 +716,9 @@ class UIDefaultsLoader
 		}
 	}
 
-	private static Dimension parseDimension( String value ) {
+	private static Dimension parseDimension( String value )
+		throws IllegalArgumentException
+	{
 		List<String> numbers = StringUtils.split( value, ',', true, false );
 		try {
 			return new DimensionUIResource(
@@ -674,43 +729,39 @@ class UIDefaultsLoader
 		}
 	}
 
-	private static Object parseColorOrFunction( String value, Function<String, String> resolver, boolean reportError ) {
+	private static Object parseColorOrFunction( String value, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		if( value.endsWith( ")" ) )
-			return parseColorFunctions( value, resolver, reportError );
+			return parseColorFunctions( value, resolver );
 
-		return parseColor( value, reportError );
+		return parseColor( value );
 	}
 
-	static ColorUIResource parseColor( String value ) {
-		return parseColor( value, false );
-	}
-
-	private static ColorUIResource parseColor( String value, boolean reportError ) {
-		try {
-			int rgba = parseColorRGBA( value );
-			return ((rgba & 0xff000000) == 0xff000000)
-				? new ColorUIResource( rgba )
-				: new ColorUIResource( new Color( rgba, true ) );
-		} catch( IllegalArgumentException ex ) {
-			if( reportError )
-				throw new IllegalArgumentException( "invalid color '" + value + "'" );
-
-			// not a color --> ignore
-		}
-		return null;
+	/**
+	 * Parses a hex color in  {@code #RGB}, {@code #RGBA}, {@code #RRGGBB} or {@code #RRGGBBAA}
+	 * format and returns it as color object.
+	 */
+	static ColorUIResource parseColor( String value )
+		throws IllegalArgumentException
+	{
+		int rgba = parseColorRGBA( value );
+		return ((rgba & 0xff000000) == 0xff000000)
+			? new ColorUIResource( rgba )
+			: new ColorUIResource( new Color( rgba, true ) );
 	}
 
 	/**
 	 * Parses a hex color in  {@code #RGB}, {@code #RGBA}, {@code #RRGGBB} or {@code #RRGGBBAA}
 	 * format and returns it as {@code rgba} integer suitable for {@link java.awt.Color},
 	 * which includes alpha component in bits 24-31.
-	 *
-	 * @throws IllegalArgumentException
 	 */
-	static int parseColorRGBA( String value ) {
+	static int parseColorRGBA( String value )
+		throws IllegalArgumentException
+	{
 		int len = value.length();
 		if( (len != 4 && len != 5 && len != 7 && len != 9) || value.charAt( 0 ) != '#' )
-			throw new IllegalArgumentException();
+			throw newInvalidColorException( value );
 
 		// parse hex
 		int n = 0;
@@ -725,7 +776,7 @@ class UIDefaultsLoader
 			else if( ch >= 'A' && ch <= 'F' )
 				digit = ch - 'A' + 10;
 			else
-				throw new IllegalArgumentException();
+				throw newInvalidColorException( value );
 
 			n = (n << 4) | digit;
 		}
@@ -744,18 +795,21 @@ class UIDefaultsLoader
 			: (((n >> 8) & 0xffffff) | ((n & 0xff) << 24)); // move alpha from lowest to highest byte
 	}
 
-	private static Object parseColorFunctions( String value, Function<String, String> resolver, boolean reportError ) {
+	private static IllegalArgumentException newInvalidColorException( String value ) {
+		return new IllegalArgumentException( "invalid color '" + value + "'" );
+	}
+
+	private static Object parseColorFunctions( String value, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		int paramsStart = value.indexOf( '(' );
-		if( paramsStart < 0 ) {
-			if( reportError )
-				throw new IllegalArgumentException( "missing opening parenthesis in function '" + value + "'" );
-			return null;
-		}
+		if( paramsStart < 0 )
+			throw new IllegalArgumentException( "missing opening parenthesis in function '" + value + "'" );
 
 		String function = StringUtils.substringTrimmed( value, 0, paramsStart );
 		List<String> params = splitFunctionParams( value.substring( paramsStart + 1, value.length() - 1 ), ',' );
 		if( params.isEmpty() )
-			throwMissingParametersException( value );
+			throw newMissingParametersException( value );
 
 		if( parseColorDepth > 100 )
 			throw new IllegalArgumentException( "endless recursion in color function '" + value + "'" );
@@ -763,28 +817,29 @@ class UIDefaultsLoader
 		parseColorDepth++;
 		try {
 			switch( function ) {
-				case "if":			return parseColorIf( value, params, resolver, reportError );
-				case "rgb":			return parseColorRgbOrRgba( false, params, resolver, reportError );
-				case "rgba":		return parseColorRgbOrRgba( true, params, resolver, reportError );
+				case "if":			return parseColorIf( value, params, resolver );
+				case "systemColor":	return parseColorSystemColor( value, params, resolver );
+				case "rgb":			return parseColorRgbOrRgba( false, params, resolver );
+				case "rgba":		return parseColorRgbOrRgba( true, params, resolver );
 				case "hsl":			return parseColorHslOrHsla( false, params );
 				case "hsla":		return parseColorHslOrHsla( true, params );
-				case "lighten":		return parseColorHSLIncreaseDecrease( 2, true, params, resolver, reportError );
-				case "darken":		return parseColorHSLIncreaseDecrease( 2, false, params, resolver, reportError );
-				case "saturate":	return parseColorHSLIncreaseDecrease( 1, true, params, resolver, reportError );
-				case "desaturate":	return parseColorHSLIncreaseDecrease( 1, false, params, resolver, reportError );
-				case "fadein":		return parseColorHSLIncreaseDecrease( 3, true, params, resolver, reportError );
-				case "fadeout":		return parseColorHSLIncreaseDecrease( 3, false, params, resolver, reportError );
-				case "fade":		return parseColorFade( params, resolver, reportError );
-				case "spin":		return parseColorSpin( params, resolver, reportError );
-				case "changeHue":		return parseColorChange( 0, params, resolver, reportError );
-				case "changeSaturation":return parseColorChange( 1, params, resolver, reportError );
-				case "changeLightness":	return parseColorChange( 2, params, resolver, reportError );
-				case "changeAlpha":		return parseColorChange( 3, params, resolver, reportError );
-				case "mix":				return parseColorMix( null, params, resolver, reportError );
-				case "tint":			return parseColorMix( "#fff", params, resolver, reportError );
-				case "shade":			return parseColorMix( "#000", params, resolver, reportError );
-				case "contrast":		return parseColorContrast( params, resolver, reportError );
-				case "over":			return parseColorOver( params, resolver, reportError );
+				case "lighten":		return parseColorHSLIncreaseDecrease( 2, true, params, resolver );
+				case "darken":		return parseColorHSLIncreaseDecrease( 2, false, params, resolver );
+				case "saturate":	return parseColorHSLIncreaseDecrease( 1, true, params, resolver );
+				case "desaturate":	return parseColorHSLIncreaseDecrease( 1, false, params, resolver );
+				case "fadein":		return parseColorHSLIncreaseDecrease( 3, true, params, resolver );
+				case "fadeout":		return parseColorHSLIncreaseDecrease( 3, false, params, resolver );
+				case "fade":		return parseColorFade( params, resolver );
+				case "spin":		return parseColorSpin( params, resolver );
+				case "changeHue":		return parseColorChange( 0, params, resolver );
+				case "changeSaturation":return parseColorChange( 1, params, resolver );
+				case "changeLightness":	return parseColorChange( 2, params, resolver );
+				case "changeAlpha":		return parseColorChange( 3, params, resolver );
+				case "mix":				return parseColorMix( null, params, resolver );
+				case "tint":			return parseColorMix( "#fff", params, resolver );
+				case "shade":			return parseColorMix( "#000", params, resolver );
+				case "contrast":		return parseColorContrast( params, resolver );
+				case "over":			return parseColorOver( params, resolver );
 			}
 		} finally {
 			parseColorDepth--;
@@ -799,13 +854,55 @@ class UIDefaultsLoader
 	 * This "if" function is only used if the "if" is passed as parameter to another
 	 * color function. Otherwise, the general "if" function is used.
 	 */
-	private static Object parseColorIf( String value, List<String> params, Function<String, String> resolver, boolean reportError ) {
+	private static Object parseColorIf( String value, List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		if( params.size() != 3 )
-			throwMissingParametersException( value );
+			throw newMissingParametersException( value );
 
 		boolean ifCondition = parseCondition( params.get( 0 ), resolver, Collections.emptyList() );
 		String ifValue = params.get( ifCondition ? 1 : 2 );
-		return parseColorOrFunction( resolver.apply( ifValue ), resolver, reportError );
+		return parseColorOrFunction( resolver.apply( ifValue ), resolver );
+	}
+
+	/**
+	 * Syntax: systemColor(name[,defaultValue])
+	 *   - name: system color name
+	 *   - defaultValue: default color value used if system color is not available
+	 */
+	private static Object parseColorSystemColor( String value, List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
+		if( params.size() < 1 )
+			throw newMissingParametersException( value );
+
+		ColorUIResource systemColor = getSystemColor( params.get( 0 ) );
+		if( systemColor != null )
+			return systemColor;
+
+		String defaultValue = (params.size() > 1) ? params.get( 1 ) : "";
+		if( defaultValue.equals( "null" ) || defaultValue.isEmpty() )
+			return null;
+
+		return parseColorOrFunction( resolver.apply( defaultValue ), resolver );
+	}
+
+	private static ColorUIResource getSystemColor( String name ) {
+		Function<String, Color> systemColorGetter = FlatLaf.getSystemColorGetter();
+		if( systemColorGetter == null )
+			return null;
+
+		// use containsKey() because value may be null
+		if( systemColorCache != null && systemColorCache.containsKey( name ) )
+			return systemColorCache.get( name );
+
+		Color color = systemColorGetter.apply( name );
+		ColorUIResource uiColor = (color != null) ? new ColorUIResource( color ) : null;
+
+		if( systemColorCache != null )
+			systemColorCache.put( name, uiColor );
+
+		return uiColor;
 	}
 
 	/**
@@ -816,7 +913,8 @@ class UIDefaultsLoader
 	 *   - alpha: an integer 0-255 or a percentage 0-100%
 	 */
 	private static ColorUIResource parseColorRgbOrRgba( boolean hasAlpha, List<String> params,
-		Function<String, String> resolver, boolean reportError )
+		Function<String, String> resolver )
+			throws IllegalArgumentException
 	{
 		if( hasAlpha && params.size() == 2 ) {
 			// syntax rgba(color,alpha), which allows adding alpha to any color
@@ -825,7 +923,7 @@ class UIDefaultsLoader
 			String colorStr = params.get( 0 );
 			int alpha = parseInteger( params.get( 1 ), 0, 255, true );
 
-			ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver, reportError );
+			ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver );
 			return new ColorUIResource( new Color( ((alpha & 0xff) << 24) | (color.getRGB() & 0xffffff), true ) );
 		}
 
@@ -846,7 +944,9 @@ class UIDefaultsLoader
 	 *   - lightness: a percentage 0-100%
 	 *   - alpha: a percentage 0-100%
 	 */
-	private static ColorUIResource parseColorHslOrHsla( boolean hasAlpha, List<String> params ) {
+	private static ColorUIResource parseColorHslOrHsla( boolean hasAlpha, List<String> params )
+		throws IllegalArgumentException
+	{
 		int hue = parseInteger( params.get( 0 ), 0, 360, false );
 		int saturation = parsePercentage( params.get( 1 ) );
 		int lightness = parsePercentage( params.get( 2 ) );
@@ -865,7 +965,8 @@ class UIDefaultsLoader
 	 *   - options: [relative] [autoInverse] [noAutoInverse] [lazy] [derived]
 	 */
 	private static Object parseColorHSLIncreaseDecrease( int hslIndex, boolean increase,
-		List<String> params, Function<String, String> resolver, boolean reportError )
+		List<String> params, Function<String, String> resolver )
+			throws IllegalArgumentException
 	{
 		String colorStr = params.get( 0 );
 		int amount = parsePercentage( params.get( 1 ) );
@@ -900,7 +1001,7 @@ class UIDefaultsLoader
 		}
 
 		// parse base color, apply function and create derived color
-		return parseFunctionBaseColor( colorStr, function, derived, resolver, reportError );
+		return parseFunctionBaseColor( colorStr, function, derived, resolver );
 	}
 
 	/**
@@ -909,7 +1010,9 @@ class UIDefaultsLoader
 	 *   - amount: percentage 0-100%
 	 *   - options: [derived] [lazy]
 	 */
-	private static Object parseColorFade( List<String> params, Function<String, String> resolver, boolean reportError ) {
+	private static Object parseColorFade( List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		String colorStr = params.get( 0 );
 		int amount = parsePercentage( params.get( 1 ) );
 		boolean derived = false;
@@ -934,7 +1037,7 @@ class UIDefaultsLoader
 		}
 
 		// parse base color, apply function and create derived color
-		return parseFunctionBaseColor( colorStr, function, derived, resolver, reportError );
+		return parseFunctionBaseColor( colorStr, function, derived, resolver );
 	}
 
 	/**
@@ -943,9 +1046,11 @@ class UIDefaultsLoader
 	 *   - angle: number of degrees to rotate
 	 *   - options: [derived]
 	 */
-	private static Object parseColorSpin( List<String> params, Function<String, String> resolver, boolean reportError ) {
+	private static Object parseColorSpin( List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		String colorStr = params.get( 0 );
-		int amount = parseInteger( params.get( 1 ), true );
+		int amount = parseInteger( params.get( 1 ) );
 		boolean derived = false;
 
 		if( params.size() > 2 ) {
@@ -957,7 +1062,7 @@ class UIDefaultsLoader
 		ColorFunction function = new ColorFunctions.HSLIncreaseDecrease( 0, true, amount, false, false );
 
 		// parse base color, apply function and create derived color
-		return parseFunctionBaseColor( colorStr, function, derived, resolver, reportError );
+		return parseFunctionBaseColor( colorStr, function, derived, resolver );
 	}
 
 	/**
@@ -970,11 +1075,12 @@ class UIDefaultsLoader
 	 *   - options: [derived]
 	 */
 	private static Object parseColorChange( int hslIndex,
-		List<String> params, Function<String, String> resolver, boolean reportError )
+		List<String> params, Function<String, String> resolver )
+			throws IllegalArgumentException
 	{
 		String colorStr = params.get( 0 );
 		int value = (hslIndex == 0)
-			? parseInteger( params.get( 1 ), true )
+			? parseInteger( params.get( 1 ) )
 			: parsePercentage( params.get( 1 ) );
 		boolean derived = false;
 
@@ -987,7 +1093,7 @@ class UIDefaultsLoader
 		ColorFunction function = new ColorFunctions.HSLChange( hslIndex, value );
 
 		// parse base color, apply function and create derived color
-		return parseFunctionBaseColor( colorStr, function, derived, resolver, reportError );
+		return parseFunctionBaseColor( colorStr, function, derived, resolver );
 	}
 
 	/**
@@ -999,7 +1105,9 @@ class UIDefaultsLoader
 	 *   - weight: the weight (in range 0-100%) to mix the two colors
 	 *             larger weight uses more of first color, smaller weight more of second color
 	 */
-	private static Object parseColorMix( String color1Str, List<String> params, Function<String, String> resolver, boolean reportError ) {
+	private static Object parseColorMix( String color1Str, List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		int i = 0;
 		if( color1Str == null )
 			color1Str = params.get( i++ );
@@ -1007,7 +1115,7 @@ class UIDefaultsLoader
 		int weight = (params.size() > i) ? parsePercentage( params.get( i ) ) : 50;
 
 		// parse second color
-		ColorUIResource color2 = (ColorUIResource) parseColorOrFunction( resolver.apply( color2Str ), resolver, reportError );
+		ColorUIResource color2 = (ColorUIResource) parseColorOrFunction( resolver.apply( color2Str ), resolver );
 		if( color2 == null )
 			return null;
 
@@ -1015,7 +1123,7 @@ class UIDefaultsLoader
 		ColorFunction function = new ColorFunctions.Mix( color2, weight );
 
 		// parse first color, apply function and create mixed color
-		return parseFunctionBaseColor( color1Str, function, false, resolver, reportError );
+		return parseFunctionBaseColor( color1Str, function, false, resolver );
 	}
 
 	/**
@@ -1026,14 +1134,16 @@ class UIDefaultsLoader
 	 *   - threshold: the threshold (in range 0-100%) to specify where the transition
 	 *                from "dark" to "light" is (default is 43%)
 	 */
-	private static Object parseColorContrast( List<String> params, Function<String, String> resolver, boolean reportError ) {
+	private static Object parseColorContrast( List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		String colorStr = params.get( 0 );
 		String darkStr = params.get( 1 );
 		String lightStr = params.get( 2 );
 		int threshold = (params.size() > 3) ? parsePercentage( params.get( 3 ) ) : 43;
 
 		// parse color to compare against
-		ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver, reportError );
+		ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver );
 		if( color == null )
 			return null;
 
@@ -1043,7 +1153,7 @@ class UIDefaultsLoader
 			: darkStr;
 
 		// parse dark or light color
-		return parseColorOrFunction( resolver.apply( darkOrLightColor ), resolver, reportError );
+		return parseColorOrFunction( resolver.apply( darkOrLightColor ), resolver );
 	}
 
 	/**
@@ -1052,12 +1162,14 @@ class UIDefaultsLoader
 	 *                 the alpha of this color is used as weight to mix the two colors
 	 *   - background: a background color (e.g. #f00) or a color function
 	 */
-	private static ColorUIResource parseColorOver( List<String> params, Function<String, String> resolver, boolean reportError ) {
+	private static ColorUIResource parseColorOver( List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
 		String foregroundStr = params.get( 0 );
 		String backgroundStr = params.get( 1 );
 
 		// parse foreground color
-		ColorUIResource foreground = (ColorUIResource) parseColorOrFunction( resolver.apply( foregroundStr ), resolver, reportError );
+		ColorUIResource foreground = (ColorUIResource) parseColorOrFunction( resolver.apply( foregroundStr ), resolver );
 		if( foreground == null || foreground.getAlpha() == 255 )
 			return foreground;
 
@@ -1065,7 +1177,7 @@ class UIDefaultsLoader
 		ColorUIResource foreground2 = new ColorUIResource( foreground.getRGB() );
 
 		// parse background color
-		ColorUIResource background = (ColorUIResource) parseColorOrFunction( resolver.apply( backgroundStr ), resolver, reportError );
+		ColorUIResource background = (ColorUIResource) parseColorOrFunction( resolver.apply( backgroundStr ), resolver );
 		if( background == null )
 			return foreground2;
 
@@ -1075,11 +1187,12 @@ class UIDefaultsLoader
 	}
 
 	private static Object parseFunctionBaseColor( String colorStr, ColorFunction function,
-		boolean derived, Function<String, String> resolver, boolean reportError )
+		boolean derived, Function<String, String> resolver )
+			throws IllegalArgumentException
 	{
 		// parse base color
 		String resolvedColorStr = resolver.apply( colorStr );
-		ColorUIResource baseColor = (ColorUIResource) parseColorOrFunction( resolvedColorStr, resolver, reportError );
+		ColorUIResource baseColor = (ColorUIResource) parseColorOrFunction( resolvedColorStr, resolver );
 		if( baseColor == null )
 			return null;
 
@@ -1107,7 +1220,9 @@ class UIDefaultsLoader
 	/**
 	 * Syntax: [normal] [bold|+bold|-bold] [italic|+italic|-italic] [<size>|+<incr>|-<decr>|<percent>%] [family[, family]] [$baseFontKey]
 	 */
-	private static Object parseFont( String value ) {
+	private static Object parseFont( String value )
+		throws IllegalArgumentException
+	{
 		Object font = fontCache.get( value );
 		if( font != null )
 			return font;
@@ -1163,11 +1278,11 @@ class UIDefaultsLoader
 								throw new IllegalArgumentException( "size specified more than once in '" + value + "'" );
 
 							if( firstChar == '+' || firstChar == '-' )
-								relativeSize = parseInteger( param, true );
+								relativeSize = parseInteger( param );
 							else if( param.endsWith( "%" ) )
-								scaleSize = parseInteger( param.substring( 0, param.length() - 1 ), true ) / 100f;
+								scaleSize = parseInteger( param.substring( 0, param.length() - 1 ) ) / 100f;
 							else
-								absoluteSize = parseInteger( param, true );
+								absoluteSize = parseInteger( param );
 						} else if( firstChar == '$' ) {
 							// reference to base font
 							if( baseFontKey != null )
@@ -1205,7 +1320,9 @@ class UIDefaultsLoader
 		return font;
 	}
 
-	private static int parsePercentage( String value ) {
+	private static int parsePercentage( String value )
+		throws IllegalArgumentException, NumberFormatException
+	{
 		if( !value.endsWith( "%" ) )
 			throw new NumberFormatException( "invalid percentage '" + value + "'" );
 
@@ -1221,7 +1338,9 @@ class UIDefaultsLoader
 		return val;
 	}
 
-	private static Boolean parseBoolean( String value ) {
+	private static Boolean parseBoolean( String value )
+		throws IllegalArgumentException
+	{
 		switch( value ) {
 			case "false":	return false;
 			case "true":	return true;
@@ -1229,87 +1348,101 @@ class UIDefaultsLoader
 		throw new IllegalArgumentException( "invalid boolean '" + value + "'" );
 	}
 
-	private static Character parseCharacter( String value ) {
+	private static Character parseCharacter( String value )
+		throws IllegalArgumentException
+	{
 		if( value.length() != 1 )
 			throw new IllegalArgumentException( "invalid character '" + value + "'" );
 		return value.charAt( 0 );
 	}
 
-	private static Integer parseInteger( String value, int min, int max, boolean allowPercentage ) {
+	private static Integer parseInteger( String value, int min, int max, boolean allowPercentage )
+		throws IllegalArgumentException, NumberFormatException
+	{
 		if( allowPercentage && value.endsWith( "%" ) ) {
 			int percent = parsePercentage( value );
 			return (max * percent) / 100;
 		}
 
-		Integer integer = parseInteger( value, true );
+		Integer integer = parseInteger( value );
 		if( integer < min || integer > max )
 			throw new NumberFormatException( "integer '" + value + "' out of range (" + min + '-' + max + ')' );
 		return integer;
 	}
 
-	private static Integer parseInteger( String value, boolean reportError ) {
+	private static Integer parseInteger( String value )
+		throws NumberFormatException
+	{
 		try {
 			return Integer.parseInt( value );
 		} catch( NumberFormatException ex ) {
-			if( reportError )
-				throw new NumberFormatException( "invalid integer '" + value + "'" );
+			throw new NumberFormatException( "invalid integer '" + value + "'" );
 		}
-		return null;
 	}
 
-	private static Number parseIntegerOrFloat( String value, boolean reportError ) {
+	private static Number parseIntegerOrFloat( String value )
+		throws NumberFormatException
+	{
 		try {
 			return Integer.parseInt( value );
 		} catch( NumberFormatException ex ) {
 			try {
 				return Float.parseFloat( value );
 			} catch( NumberFormatException ex2 ) {
-				if( reportError )
-					throw new NumberFormatException( "invalid integer or float '" + value + "'" );
+				throw new NumberFormatException( "invalid integer or float '" + value + "'" );
 			}
 		}
-		return null;
 	}
 
-	private static Float parseFloat( String value, boolean reportError ) {
+	private static Float parseFloat( String value )
+		throws NumberFormatException
+	{
 		try {
 			return Float.parseFloat( value );
 		} catch( NumberFormatException ex ) {
-			if( reportError )
-				throw new NumberFormatException( "invalid float '" + value + "'" );
+			throw new NumberFormatException( "invalid float '" + value + "'" );
 		}
-		return null;
 	}
 
-	private static ActiveValue parseScaledInteger( String value ) {
-		int val = parseInteger( value, true );
+	private static ActiveValue parseScaledInteger( String value )
+		throws NumberFormatException
+	{
+		int val = parseInteger( value );
 		return t -> {
 			return UIScale.scale( val );
 		};
 	}
 
-	private static ActiveValue parseScaledFloat( String value ) {
-		float val = parseFloat( value, true );
+	private static ActiveValue parseScaledFloat( String value )
+		throws NumberFormatException
+	{
+		float val = parseFloat( value );
 		return t -> {
 			return UIScale.scale( val );
 		};
 	}
 
-	private static ActiveValue parseScaledInsets( String value ) {
+	private static ActiveValue parseScaledInsets( String value )
+		throws IllegalArgumentException
+	{
 		Insets insets = parseInsets( value );
 		return t -> {
 			return UIScale.scale( insets );
 		};
 	}
 
-	private static ActiveValue parseScaledDimension( String value ) {
+	private static ActiveValue parseScaledDimension( String value )
+		throws IllegalArgumentException
+	{
 		Dimension dimension = parseDimension( value );
 		return t -> {
 			return UIScale.scale( dimension );
 		};
 	}
 
-	private static Object parseGrayFilter( String value ) {
+	private static Object parseGrayFilter( String value )
+		throws IllegalArgumentException
+	{
 		List<String> numbers = StringUtils.split( value, ',', true, false );
 		try {
 			int brightness = Integer.parseInt( numbers.get( 0 ) );
@@ -1344,11 +1477,95 @@ class UIDefaultsLoader
 				start = i + 1;
 			}
 		}
-		strs.add( StringUtils.substringTrimmed( str, start ) );
+
+		// last param
+		String s = StringUtils.substringTrimmed( str, start );
+		if( !s.isEmpty() || !strs.isEmpty() )
+			strs.add( s );
 
 		return strs;
 	}
 
+	private static Object invokeConstructorOrStaticMethod( Executable[] constructorsOrMethods,
+			List<String> parts, Function<String, String> resolver )
+		throws Exception
+	{
+		// order constructors/methods by parameter types:
+		// - String parameters to the end
+		// - int before float parameters
+		constructorsOrMethods = constructorsOrMethods.clone();
+		Arrays.sort( constructorsOrMethods, (c1, c2) -> {
+			Class<?>[] ptypes1 = c1.getParameterTypes();
+			Class<?>[] ptypes2 = c2.getParameterTypes();
+			if( ptypes1.length != ptypes2.length )
+				return ptypes1.length - ptypes2.length;
+
+			for( int i = 0; i < ptypes1.length; i++ ) {
+				Class<?> pt1 = ptypes1[i];
+				Class<?> pt2 = ptypes2[i];
+
+				if( pt1 == pt2 )
+					continue;
+
+				// order methods with String parameters to the end
+				if( pt1 == String.class )
+					return 2;
+				if( pt2 == String.class )
+					return -2;
+
+				// order int before float
+				if( pt1 == int.class )
+					return -1;
+				if( pt2 == int.class )
+					return 1;
+			}
+			return 0;
+		} );
+
+		// search for best constructor/method for given parameter values
+		for( Executable cm : constructorsOrMethods ) {
+			if( cm.getParameterCount() != parts.size() - 1 )
+				continue;
+
+			Object[] params = parseMethodParams( cm.getParameterTypes(), parts, resolver );
+			if( params == null )
+				continue;
+
+			// invoke constructor or static method
+			if( cm instanceof Constructor )
+				return ((Constructor<?>)cm).newInstance( params );
+			else
+				return ((Method)cm).invoke( null, params );
+		}
+
+		return null;
+	}
+
+	private static Object[] parseMethodParams( Class<?>[] paramTypes, List<String> parts, Function<String, String> resolver ) {
+		Object[] params = new Object[paramTypes.length];
+		try {
+			for( int i = 0; i < params.length; i++ ) {
+				Class<?> paramType = paramTypes[i];
+				String paramValue = parts.get( i + 1 );
+				if( paramType == String.class )
+					params[i] = paramValue;
+				else if( paramType == boolean.class )
+					params[i] = parseBoolean( paramValue );
+				else if( paramType == int.class )
+					params[i] = parseInteger( paramValue );
+				else if( paramType == float.class )
+					params[i] = parseFloat( paramValue );
+				else if( paramType == Color.class )
+					params[i] = parseColorOrFunction( resolver.apply( paramValue ), resolver );
+				else
+					return null; // unsupported parameter type
+			}
+		} catch( IllegalArgumentException ex ) {
+			return null; // failed to parse parameter for expected parameter type
+		}
+		return params;
+	}
+
 	/**
 	 * For use in LazyValue to get value for given key from UIManager and report error
 	 * if not found. If key is prefixed by '?', then no error is reported.
@@ -1366,7 +1583,7 @@ class UIDefaultsLoader
 		return value;
 	}
 
-	private static void throwMissingParametersException( String value ) {
-		throw new IllegalArgumentException( "missing parameters in function '" + value + "'" );
+	private static IllegalArgumentException newMissingParametersException( String value ) {
+		return new IllegalArgumentException( "missing parameters in function '" + value + "'" );
 	}
 }

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

@@ -16,9 +16,12 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Area;
 import java.awt.geom.Path2D;
 import java.awt.geom.Rectangle2D;
 import java.awt.geom.RoundRectangle2D;
@@ -36,6 +39,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatCapsLockIcon
 	extends FlatAbstractIcon
 {
+	private Path2D path;
+
 	public FlatCapsLockIcon() {
 		super( 16, 16, UIManager.getColor( "PasswordField.capsLockIconColor" ) );
 	}
@@ -63,16 +68,22 @@ public class FlatCapsLockIcon
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
 			  <g fill="none" fill-rule="evenodd">
 			    <rect width="16" height="16" fill="#6E6E6E" rx="3"/>
-			    <rect width="6" height="2" x="5" y="11.5" fill="#FFF"/>
-    			<path fill="#FFF" d="M2,8 L8,2 L14,8 L11,8 L11,10 L5,10 L5,8 L2,8 Z"/>
+			    <rect width="5" height="2" x="5.5" y="11.5" stroke="#FFF" stroke-linejoin="round"/>
+			    <path stroke="#FFF" stroke-linejoin="round" d="M2.5,7.5 L8,2 L13.5,7.5 L10.5,7.5 L10.5,9.5 L5.5,9.5 L5.5,7.5 L2.5,7.5 Z"/>
 			  </g>
 			</svg>
 		*/
 
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new RoundRectangle2D.Float( 0, 0, 16, 16, 6, 6 ), false );
-		path.append( new Rectangle2D.Float( 5, 11.5f, 6, 2 ), false );
-		path.append( FlatUIUtils.createPath( 2,8, 8,2, 14,8, 11,8, 11,10, 5,10, 5,8 ), false );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		BasicStroke stroke = new BasicStroke( 1, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_ROUND );
+
+		if( path == null ) {
+			path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
+			path.append( new RoundRectangle2D.Float( 0, 0, 16, 16, 6, 6 ), false );
+			path.append( new Area( stroke.createStrokedShape( new Rectangle2D.Float( 5.5f, 11.5f, 5, 2 ) ) ), false );
+			path.append( new Area( stroke.createStrokedShape( FlatUIUtils.createPath(
+				2.5,7.5, 8,2, 13.5,7.5, 10.5,7.5, 10.5,9.5, 5.5,9.5, 5.5,7.5, 2.5,7.5 ) ) ), false );
+		}
 		g.fill( path );
 	}
 }

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

@@ -242,7 +242,7 @@ public class FlatCheckBoxIcon
 	}
 
 	protected void paintCheckmark( Component c, Graphics2D g ) {
-		Path2D.Float path = new Path2D.Float();
+		Path2D.Float path = new Path2D.Float( Path2D.WIND_NON_ZERO, 3 );
 		path.moveTo( 4.5f, 7.5f );
 		path.lineTo( 6.6f, 10f );
 		path.lineTo( 11.25f, 3.5f );

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

@@ -76,7 +76,7 @@ public class FlatCheckBoxMenuItemIcon
 	}
 
 	protected void paintCheckmark( Graphics2D g2 ) {
-		Path2D.Float path = new Path2D.Float();
+		Path2D.Float path = new Path2D.Float( Path2D.WIND_NON_ZERO, 3 );
 		path.moveTo( 4.5f, 7.5f );
 		path.lineTo( 6.6f, 10f );
 		path.lineTo( 11.25f, 3.5f );

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

@@ -20,7 +20,6 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Ellipse2D;
-import java.awt.geom.Line2D;
 import java.awt.geom.Path2D;
 import java.util.Map;
 import javax.swing.AbstractButton;
@@ -103,9 +102,11 @@ public class FlatClearIcon
 
 		// paint cross
 		g.setColor( clearIconColor );
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new Line2D.Float( 5,5, 11,11 ), false );
-		path.append( new Line2D.Float( 5,11, 11,5 ), false );
+		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD, 4 );
+		path.moveTo( 5, 5 );
+		path.lineTo( 11, 11 );
+		path.moveTo( 5, 11 );
+		path.lineTo( 11, 5 );
 		g.draw( path );
 	}
 }

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

@@ -39,21 +39,25 @@ public class FlatFileChooserDetailsViewIcon
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
 			  <g fill="none" fill-rule="evenodd">
-			    <rect width="2" height="2" x="2" y="3" fill="#6E6E6E"/>
-			    <rect width="2" height="2" x="2" y="7" fill="#6E6E6E"/>
-			    <rect width="2" height="2" x="2" y="11" fill="#6E6E6E"/>
-			    <rect width="8" height="2" x="6" y="3" fill="#6E6E6E"/>
-			    <rect width="8" height="2" x="6" y="7" fill="#6E6E6E"/>
-			    <rect width="8" height="2" x="6" y="11" fill="#6E6E6E"/>
+			    <rect width="2" height="1" x="2" y="3" fill="#6E6E6E" rx=".5"/>
+			    <rect width="2" height="1" x="2" y="6" fill="#6E6E6E" rx=".5"/>
+			    <rect width="2" height="1" x="2" y="9" fill="#6E6E6E" rx=".5"/>
+			    <rect width="2" height="1" x="2" y="12" fill="#6E6E6E" rx=".5"/>
+			    <rect width="8" height="1" x="6" y="3" fill="#6E6E6E" rx=".5"/>
+			    <rect width="8" height="1" x="6" y="6" fill="#6E6E6E" rx=".5"/>
+			    <rect width="8" height="1" x="6" y="9" fill="#6E6E6E" rx=".5"/>
+			    <rect width="8" height="1" x="6" y="12" fill="#6E6E6E" rx=".5"/>
 			  </g>
 			</svg>
 		*/
 
-		g.fillRect( 2, 3, 2, 2 );
-		g.fillRect( 2, 7, 2, 2 );
-		g.fillRect( 2, 11, 2, 2 );
-		g.fillRect( 6, 3, 8, 2 );
-		g.fillRect( 6, 7, 8, 2 );
-		g.fillRect( 6, 11, 8, 2 );
+		g.fillRoundRect( 2, 3, 2, 1, 1, 1 );
+		g.fillRoundRect( 2, 6, 2, 1, 1, 1 );
+		g.fillRoundRect( 2, 9, 2, 1, 1, 1 );
+		g.fillRoundRect( 2, 12, 2, 1, 1, 1 );
+		g.fillRoundRect( 6, 3, 8, 1, 1, 1 );
+		g.fillRoundRect( 6, 6, 8, 1, 1, 1 );
+		g.fillRoundRect( 6, 9, 8, 1, 1, 1 );
+		g.fillRoundRect( 6, 12, 8, 1, 1, 1 );
 	}
 }

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

@@ -16,8 +16,10 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
@@ -39,10 +41,22 @@ public class FlatFileChooserHomeFolderIcon
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-			  <polygon fill="#6E6E6E" fill-rule="evenodd" points="2 8 8 2 14 8 12 8 12 13 9 13 9 10 7 10 7 13 4 13 4 8"/>
+			  <g fill="none" fill-rule="evenodd">
+			    <polyline stroke="#6E6E6E" stroke-linejoin="round" points="6.5 13 6.5 9.5 9.5 9.5 9.5 13"/>
+			    <path stroke="#6E6E6E" d="M3.5,6.5 L3.5,12.5 C3.5,13.0522847 3.94771525,13.5 4.5,13.5 L11.5,13.5 C12.0522847,13.5 12.5,13.0522847 12.5,12.5 L12.5,6.5 L12.5,6.5"/>
+			    <polyline stroke="#6E6E6E" stroke-linecap="round" stroke-linejoin="round" points="1.5 8.5 8 2 14.5 8.5"/>
+			  </g>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 2,8, 8,2, 14,8, 12,8, 12,13, 9,13, 9,10, 7,10, 7,13, 4,13, 4,8 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
+
+		g.draw( FlatUIUtils.createPath( false, 6.5,13, 6.5,9.5, 9.5,9.5, 9.5,13 ) );
+		g.draw( FlatUIUtils.createPath( false, 3.5,6.5,
+			3.5,12.5,  FlatUIUtils.QUAD_TO, 3.5,13.5,  4.5,13.5,
+			11.5,13.5, FlatUIUtils.QUAD_TO, 12.5,13.5, 12.5,12.5,
+			12.5,6.5 ) );
+		g.draw( FlatUIUtils.createPath( false, 1.5,8.5, 8,2, 14.5,8.5 ) );
 	}
 }

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

@@ -16,8 +16,11 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.RoundRectangle2D;
 import javax.swing.UIManager;
 
 /**
@@ -39,17 +42,20 @@ public class FlatFileChooserListViewIcon
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
 			  <g fill="none" fill-rule="evenodd">
-			    <rect width="4" height="4" x="3" y="3" fill="#6E6E6E"/>
-			    <rect width="4" height="4" x="3" y="9" fill="#6E6E6E"/>
-			    <rect width="4" height="4" x="9" y="9" fill="#6E6E6E"/>
-			    <rect width="4" height="4" x="9" y="3" fill="#6E6E6E"/>
+			    <rect width="4" height="4" x="2.5" y="2.5" stroke="#6E6E6E" rx="1.5"/>
+			    <rect width="4" height="4" x="2.5" y="9.5" stroke="#6E6E6E" rx="1.5"/>
+			    <rect width="4" height="4" x="9.5" y="9.5" stroke="#6E6E6E" rx="1.5"/>
+			    <rect width="4" height="4" x="9.5" y="2.5" stroke="#6E6E6E" rx="1.5"/>
 			  </g>
 			</svg>
 		*/
 
-		g.fillRect( 3, 3, 4, 4 );
-		g.fillRect( 3, 9, 4, 4 );
-		g.fillRect( 9, 9, 4, 4 );
-		g.fillRect( 9, 3, 4, 4 );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
+
+		g.draw( new RoundRectangle2D.Float( 2.5f, 2.5f, 4, 4, 2, 2 ) );
+		g.draw( new RoundRectangle2D.Float( 2.5f, 9.5f, 4, 4, 2, 2 ) );
+		g.draw( new RoundRectangle2D.Float( 9.5f, 9.5f, 4, 4, 2, 2 ) );
+		g.draw( new RoundRectangle2D.Float( 9.5f, 2.5f, 4, 4, 2, 2 ) );
 	}
 }

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

@@ -16,10 +16,13 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
+import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Line2D;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
  * "new folder" icon for {@link javax.swing.JFileChooser}.
@@ -31,6 +34,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatFileChooserNewFolderIcon
 	extends FlatAbstractIcon
 {
+	private final Color greenColor = UIManager.getColor( "Actions.Green" );
+
 	public FlatFileChooserNewFolderIcon() {
 		super( 16, 16, UIManager.getColor( "Actions.Grey" ) );
 	}
@@ -40,13 +45,20 @@ public class FlatFileChooserNewFolderIcon
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
 			  <g fill="none" fill-rule="evenodd">
-			    <polygon fill="#6E6E6E" points="2 3 5.5 3 7 5 14 5 14 8 11 8 11 10 9 10 9 13 2 13"/>
-			    <path fill="#59A869" d="M14,11 L16,11 L16,13 L14,13 L14,15 L12,15 L12,13 L10,13 L10,11 L12,11 L12,9 L14,9 L14,11 Z"/>
+			    <path stroke="#6E6E6E" d="M13,13.5 L3,13.5 C2.17157288,13.5 1.5,12.8284271 1.5,12 L1.5,4 C1.5,3.17157288 2.17157288,2.5 3,2.5 L6.29289322,2.5 C6.42550146,2.5 6.55267842,2.55267842 6.64644661,2.64644661 L8.5,4.5 L8.5,4.5 L13,4.5 C13.8284271,4.5 14.5,5.17157288 14.5,6 L14.5,12 C14.5,12.8284271 13.8284271,13.5 13,13.5 Z"/>
+			    <line x1="5.5" x2="10.5" y1="9" y2="9" stroke="#59A869" stroke-linecap="round"/>
+			    <line x1="8" x2="8" y1="6.5" y2="11.5" stroke="#59A869" stroke-linecap="round"/>
 			  </g>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 2,3, 5.5,3, 7,5, 14,5, 14,8, 11,8, 11,10, 9,10, 9,13, 2,13 ) );
-		g.fill( FlatUIUtils.createPath( 14,11, 16,11, 16,13, 14,13, 14,15, 12,15, 12,13, 10,13, 10,11, 12,11, 12,9, 14,9, 14,11 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
+
+		g.draw( FlatFileViewDirectoryIcon.createFolderPath() );
+
+		g.setColor( greenColor );
+		g.draw( new Line2D.Float( 5.5f, 9, 10.5f, 9 ) );
+		g.draw( new Line2D.Float( 8, 6.5f, 8, 11.5f ) );
 	}
 }

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

@@ -16,9 +16,12 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Line2D;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
@@ -44,15 +47,20 @@ public class FlatFileChooserUpFolderIcon
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
 			  <g fill="none" fill-rule="evenodd">
-			    <polygon fill="#6E6E6E" points="2 3 5.5 3 7 5 9 5 9 9 13 9 13 5 14 5 14 13 2 13"/>
-			    <path fill="#389FD6" d="M12,4 L12,8 L10,8 L10,4 L8,4 L11,1 L14,4 L12,4 Z"/>
+			    <path stroke="#6E6E6E" d="M13,13.5 L3,13.5 C2.17157288,13.5 1.5,12.8284271 1.5,12 L1.5,4 C1.5,3.17157288 2.17157288,2.5 3,2.5 L6.29289322,2.5 C6.42550146,2.5 6.55267842,2.55267842 6.64644661,2.64644661 L8.5,4.5 L8.5,4.5 L13,4.5 C13.8284271,4.5 14.5,5.17157288 14.5,6 L14.5,12 C14.5,12.8284271 13.8284271,13.5 13,13.5 Z"/>
+			    <line x1="8" x2="8" y1="6.5" y2="11.5" stroke="#389FD6" stroke-linecap="round"/>
+			    <polyline stroke="#389FD6" stroke-linecap="round" stroke-linejoin="round" points="5.5 9 8 6.5 10.5 9"/>
 			  </g>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 2,3, 5.5,3, 7,5, 9,5, 9,9, 13,9, 13,5, 14,5, 14,13, 2,13 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
+
+		g.draw( FlatFileViewDirectoryIcon.createFolderPath() );
 
 		g.setColor( blueColor );
-		g.fill( FlatUIUtils.createPath( 12,4, 12,8, 10,8, 10,4, 8,4, 11,1, 14,4, 12,4 ) );
+		g.draw( new Line2D.Float( 8, 6.5f, 8, 11.5f ) );
+		g.draw( FlatUIUtils.createPath( false, 5.5,9, 8,6.5, 10.5,9 ) );
 	}
 }

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

@@ -16,10 +16,12 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
-import java.awt.geom.Path2D;
-import java.awt.geom.Rectangle2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Line2D;
+import java.awt.geom.RoundRectangle2D;
 import javax.swing.UIManager;
 
 /**
@@ -41,17 +43,18 @@ public class FlatFileViewComputerIcon
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
 			  <g fill="none" fill-rule="evenodd">
-			    <path fill="#6E6E6E" d="M2,3 L14,3 L14,11 L2,11 L2,3 Z M4,5 L4,9 L12,9 L12,5 L4,5 Z"/>
-			    <rect width="12" height="2" x="2" y="12" fill="#6E6E6E"/>
+			    <rect width="11" height="7" x="2.5" y="3.5" stroke="#6E6E6E" rx="1"/>
+			    <line x1="8" x2="8" y1="11" y2="12" stroke="#6E6E6E"/>
+			    <line x1="4.5" x2="11.5" y1="12.5" y2="12.5" stroke="#6E6E6E" stroke-linecap="round"/>
 			  </g>
 			</svg>
 		*/
 
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new Rectangle2D.Float( 2, 3, 12, 8 ), false );
-		path.append( new Rectangle2D.Float( 4, 5, 8, 4 ), false );
-		g.fill( path );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
 
-		g.fillRect( 2, 12, 12, 2 );
+		g.draw( new RoundRectangle2D.Float( 2.5f, 3.5f, 11, 7, 2, 2 ) );
+		g.drawLine( 8, 11, 8, 12 );
+		g.draw( new Line2D.Float( 4.5f, 12.5f, 11.5f, 12.5f ) );
 	}
 }

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

@@ -18,6 +18,8 @@ package com.formdev.flatlaf.icons;
 
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Path2D;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
@@ -31,6 +33,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatFileViewDirectoryIcon
 	extends FlatAbstractIcon
 {
+	private Path2D path;
+
 	public FlatFileViewDirectoryIcon() {
 		super( 16, 16, UIManager.getColor( "Objects.Grey" ) );
 	}
@@ -39,10 +43,32 @@ public class FlatFileViewDirectoryIcon
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-			  <polygon fill="#6E6E6E" fill-rule="evenodd" points="1 2 6 2 8 4 15 4 15 13 1 13"/>
+			  <path fill="none" stroke="#6E6E6E" d="M13,13.5 L3,13.5 C2.17157288,13.5 1.5,12.8284271 1.5,12 L1.5,4 C1.5,3.17157288 2.17157288,2.5 3,2.5 L6.29289322,2.5 C6.42550146,2.5 6.55267842,2.55267842 6.64644661,2.64644661 L8.5,4.5 L8.5,4.5 L13,4.5 C13.8284271,4.5 14.5,5.17157288 14.5,6 L14.5,12 C14.5,12.8284271 13.8284271,13.5 13,13.5 Z"/>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 1,2, 6,2, 8,4, 15,4, 15,13, 1,13 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+
+		if( path == null )
+			path = createFolderPath();
+		g.draw( path );
+	}
+
+	static Path2D createFolderPath() {
+		double arc = 1.5;
+		double arc2 = 0.5;
+		return FlatUIUtils.createPath(
+			// bottom-right
+			14.5,13.5-arc,  FlatUIUtils.QUAD_TO, 14.5,13.5, 14.5-arc,13.5,
+			// bottom-left
+			1.5+arc,13.5,   FlatUIUtils.QUAD_TO, 1.5,13.5,  1.5,13.5-arc,
+			// top-left
+			1.5,2.5+arc,    FlatUIUtils.QUAD_TO, 1.5,2.5,   1.5+arc,2.5,
+			// top-mid-left
+			6.5-arc2,2.5,   FlatUIUtils.QUAD_TO, 6.5,2.5,   6.5+arc2,2.5+arc2,
+			// top-mid-right
+			8.5,4.5,
+			// top-right
+			14.5-arc,4.5,   FlatUIUtils.QUAD_TO, 14.5,4.5,  14.5,4.5+arc );
 	}
 }

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

@@ -16,8 +16,11 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Path2D;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
@@ -31,6 +34,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatFileViewFileIcon
 	extends FlatAbstractIcon
 {
+	private Path2D path;
+
 	public FlatFileViewFileIcon() {
 		super( 16, 16, UIManager.getColor( "Objects.Grey" ) );
 	}
@@ -39,14 +44,33 @@ public class FlatFileViewFileIcon
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-			  <g fill="none" fill-rule="evenodd">
-			    <polygon fill="#6E6E6E" points="8 6 8 1 13 1 13 15 3 15 3 6"/>
-			    <polygon fill="#6E6E6E" points="3 5 7 5 7 1"/>
+			  <g fill="none" fill-rule="evenodd" stroke-linejoin="round">
+			    <path stroke="#6E6E6E" d="M4,1.5 L8.8,1.5 L8.8,1.5 L13.5,6.2 L13.5,13 C13.5,13.8284271 12.8284271,14.5 12,14.5 L4,14.5 C3.17157288,14.5 2.5,13.8284271 2.5,13 L2.5,3 C2.5,2.17157288 3.17157288,1.5 4,1.5 Z"/>
+			    <path stroke="#6E6E6E" d="M8.5,2 L8.5,5 C8.5,5.82842712 9.17157288,6.5 10,6.5 L13,6.5 L13,6.5"/>
 			  </g>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 8,6, 8,1, 13,1, 13,15, 3,15, 3,6 ) );
-		g.fill( FlatUIUtils.createPath( 3,5, 7,5, 7,1 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
+
+		if( path == null ) {
+			double arc = 1.5;
+			path = FlatUIUtils.createPath( false,
+				// top-left
+				2.5,1.5+arc,    FlatUIUtils.QUAD_TO, 2.5,1.5,   2.5+arc,1.5,
+				// top-right
+				8.8,1.5, 13.5,6.2,
+				// bottom-right
+				13.5,14.5-arc,  FlatUIUtils.QUAD_TO, 13.5,14.5, 13.5-arc,14.5,
+				// bottom-left
+				2.5+arc,14.5,   FlatUIUtils.QUAD_TO, 2.5,14.5,  2.5,14.5-arc,
+				FlatUIUtils.CLOSE_PATH,
+
+				FlatUIUtils.MOVE_TO, 8.5,2,
+				8.5,6.5-arc,    FlatUIUtils.QUAD_TO, 8.5,6.5,   8.5+arc,6.5,
+				13,6.5 );
+		}
+		g.draw( path );
 	}
 }

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

@@ -16,9 +16,10 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
-import java.awt.geom.Path2D;
+import java.awt.RenderingHints;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
@@ -40,18 +41,22 @@ public class FlatFileViewFloppyDriveIcon
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-			  <g fill="none" fill-rule="evenodd">
-			    <path fill="#6E6E6E" d="M11,14 L11,11 L5,11 L5,14 L2,14 L2,2 L14,2 L14,14 L11,14 Z M4,4 L4,8 L12,8 L12,4 L4,4 Z"/>
-			    <rect width="4" height="2" x="6" y="12" fill="#6E6E6E"/>
+			  <g fill="none" fill-rule="evenodd" stroke-linejoin="round">
+			    <path stroke="#6E6E6E" d="M3.5,2.5 L11.5,2.5 L11.5,2.5 L13.5,4.5 L13.5,12.5 C13.5,13.0522847 13.0522847,13.5 12.5,13.5 L3.5,13.5 C2.94771525,13.5 2.5,13.0522847 2.5,12.5 L2.5,3.5 C2.5,2.94771525 2.94771525,2.5 3.5,2.5 Z"/>
+			    <polyline stroke="#6E6E6E" points="4.5 13 4.5 9.5 11.5 9.5 11.5 13"/>
+			    <polyline stroke="#6E6E6E" points="5.5 3 5.5 5.5 10.5 5.5 10.5 3"/>
 			  </g>
 			</svg>
 		*/
 
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( FlatUIUtils.createPath( 11,14, 11,11, 5,11, 5,14, 2,14, 2,2, 14,2, 14,14, 11,14 ), false );
-		path.append( FlatUIUtils.createPath( 4,4, 4,8, 12,8, 12,4, 4,4 ), false );
-		g.fill( path );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
 
-		g.fillRect( 6, 12, 4, 2 );
+		g.draw( FlatUIUtils.createPath( 3.5,2.5, 11.5,2.5, 11.5,2.5, 13.5,4.5,
+			13.5,12.5, FlatUIUtils.QUAD_TO, 13.5,13.5, 12.5,13.5,
+			3.5,13.5,  FlatUIUtils.QUAD_TO, 2.5,13.5,  2.5,12.5,
+			2.5,3.5,   FlatUIUtils.QUAD_TO, 2.5,2.5,   3.5,2.5 ) );
+		g.draw( FlatUIUtils.createPath( false, 4.5,13, 4.5,9.5, 11.5,9.5, 11.5,13 ) );
+		g.draw( FlatUIUtils.createPath( false, 5.5,3, 5.5,5.5, 10.5,5.5, 10.5,3 ) );
 	}
 }

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

@@ -16,10 +16,12 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
-import java.awt.geom.Path2D;
-import java.awt.geom.Rectangle2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Ellipse2D;
+import java.awt.geom.RoundRectangle2D;
 import javax.swing.UIManager;
 
 /**
@@ -40,14 +42,19 @@ public class FlatFileViewHardDriveIcon
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-			  <path fill="#6E6E6E" fill-rule="evenodd" d="M2,6 L14,6 L14,10 L2,10 L2,6 Z M12,8 L12,9 L13,9 L13,8 L12,8 Z M10,8 L10,9 L11,9 L11,8 L10,8 Z"/>
+			  <g fill="none" fill-rule="evenodd">
+			    <rect width="11" height="5" x="2.5" y="5.5" stroke="#6E6E6E" rx="1"/>
+			    <circle cx="11.5" cy="8.5" r="1" fill="#6E6E6E"/>
+			    <circle cx="9.5" cy="8.5" r="1" fill="#6E6E6E"/>
+			  </g>
 			</svg>
 		*/
 
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new Rectangle2D.Float( 2, 6, 12, 4 ), false );
-		path.append( new Rectangle2D.Float( 12, 8, 1, 1 ), false );
-		path.append( new Rectangle2D.Float( 10, 8, 1, 1 ), false );
-		g.fill( path );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
+
+		g.draw( new RoundRectangle2D.Float( 2.5f, 5.5f, 11, 5, 2, 2 ) );
+		g.fill( new Ellipse2D.Float( 10.8f, 7.8f, 1.4f, 1.4f ) );
+		g.fill( new Ellipse2D.Float( 8.8f, 7.8f, 1.4f, 1.4f ) );
 	}
 }

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

@@ -17,9 +17,11 @@
 package com.formdev.flatlaf.icons;
 
 import static com.formdev.flatlaf.util.UIScale.*;
+import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
 import java.util.Map;
@@ -96,7 +98,8 @@ public class FlatHelpButtonIcon
 			  <g fill="none" fill-rule="evenodd">
 			    <circle cx="11" cy="11" r="10.5" fill="#6E6E6E"/>
 			    <circle cx="11" cy="11" r="9.5" fill="#FFF"/>
-			    <path fill="#6E6E6E" d="M10,17 L12,17 L12,15 L10,15 L10,17 Z M11,5 C8.8,5 7,6.8 7,9 L9,9 C9,7.9 9.9,7 11,7 C12.1,7 13,7.9 13,9 C13,11 10,10.75 10,14 L12,14 C12,11.75 15,11.5 15,9 C15,6.8 13.2,5 11,5 Z"/>
+			    <path stroke="#6E6E6E" stroke-linecap="round" stroke-width="2" d="M8,8.5 C8.25,7 9.66585007,6 11,6 C12.5,6 14,7 14,8.5 C14,10.5 11,11 11,13"/>
+			    <circle cx="11" cy="16" r="1.2" fill="#6E6E6E"/>
 			  </g>
 			</svg>
 		*/
@@ -147,22 +150,19 @@ public class FlatHelpButtonIcon
 		g2.fill( new Ellipse2D.Float( xy, xy, wh, wh ) );
 
 		// paint question mark
-		Path2D q = new Path2D.Float();
-		q.moveTo( 11, 5 );
-		q.curveTo( 8.8,5, 7,6.8, 7,9 );
-		q.lineTo( 9, 9 );
-		q.curveTo( 9,7.9, 9.9,7, 11,7 );
-		q.curveTo( 12.1,7, 13,7.9, 13,9 );
-		q.curveTo( 13,11, 10,10.75, 10,14 );
-		q.lineTo( 12, 14 );
-		q.curveTo( 12,11.75, 15,11.5, 15,9 );
-		q.curveTo( 15,6.8, 13.2,5, 11,5 );
-		q.closePath();
+		Path2D q = new Path2D.Float( Path2D.WIND_NON_ZERO, 10 );
+		q.moveTo( 8,8.5 );
+		q.curveTo( 8.25,7, 9.66585007,6, 11,6 );
+		q.curveTo( 12.5,6, 14,7, 14,8.5 );
+		q.curveTo( 14,10.5, 11,11, 11,13 );
+
+		g2.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g2.setStroke( new BasicStroke( 2, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
 
 		g2.translate( focusWidth, focusWidth );
 		g2.setColor( enabled ? questionMarkColor : disabledQuestionMarkColor );
-		g2.fill( q );
-		g2.fillRect( 10, 15, 2, 2 );
+		g2.draw( q );
+		g2.fill( new Ellipse2D.Float( 9.8f, 14.8f, 2.4f, 2.4f ) );
 	}
 
 	@Override

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

@@ -20,7 +20,6 @@ import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
-import java.awt.geom.Line2D;
 import java.awt.geom.Path2D;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
@@ -54,13 +53,15 @@ public class FlatInternalFrameCloseIcon
 
 		g.setColor( FlatButtonUI.buttonStateColor( c, c.getForeground(), null, null, hoverForeground, pressedForeground ) );
 
-		float mx = width / 2;
-		float my = height / 2;
+		float mx = width / 2f;
+		float my = height / 2f;
 		float r = 3.25f;
 
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new Line2D.Float( mx - r, my - r, mx + r, my + r ), false );
-		path.append( new Line2D.Float( mx - r, my + r, mx + r, my - r ), false );
+		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD, 4 );
+		path.moveTo( mx - r, my - r );
+		path.lineTo( mx + r, my + r );
+		path.moveTo( mx - r, my + r );
+		path.lineTo( mx + r, my - r );
 		g.setStroke( new BasicStroke( 1f ) );
 		g.draw( path );
 	}

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

@@ -19,7 +19,7 @@ package com.formdev.flatlaf.icons;
 import java.awt.Shape;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.awt.geom.Rectangle2D;
+import java.awt.geom.RoundRectangle2D;
 
 /**
  * "Error" icon for {@link javax.swing.JOptionPane}.
@@ -40,8 +40,8 @@ public class FlatOptionPaneErrorIcon
 		<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32">
 		  <g fill="none" fill-rule="evenodd">
 		    <circle cx="16" cy="16" r="14" fill="#DB5860"/>
-		    <rect width="4" height="11" x="14" y="7" fill="#FFF"/>
-		    <rect width="4" height="4" x="14" y="21" fill="#FFF"/>
+		    <rect width="4" height="12" x="14" y="7" fill="#FFF" rx="2"/>
+		    <circle cx="16" cy="23" r="2" fill="#FFF"/>
 		  </g>
 		</svg>
 	*/
@@ -54,8 +54,8 @@ public class FlatOptionPaneErrorIcon
 	@Override
 	protected Shape createInside() {
 		Path2D inside = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		inside.append( new Rectangle2D.Float( 14, 7, 4, 11 ), false );
-		inside.append( new Rectangle2D.Float( 14, 21, 4, 4 ), false );
+		inside.append( new RoundRectangle2D.Float( 14, 7, 4, 12, 4, 4 ), false );
+		inside.append( new Ellipse2D.Float( 14, 21, 4, 4 ), false );
 		return inside;
 	}
 }

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

@@ -19,7 +19,7 @@ package com.formdev.flatlaf.icons;
 import java.awt.Shape;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.awt.geom.Rectangle2D;
+import java.awt.geom.RoundRectangle2D;
 
 /**
  * "Information" icon for {@link javax.swing.JOptionPane}.
@@ -40,8 +40,8 @@ public class FlatOptionPaneInformationIcon
 		<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32">
 		  <g fill="none" fill-rule="evenodd">
 		    <circle cx="16" cy="16" r="14" fill="#389FD6"/>
-		    <rect width="4" height="11" x="14" y="14" fill="#FFF"/>
-		    <rect width="4" height="4" x="14" y="7" fill="#FFF"/>
+		    <rect width="4" height="12" x="14" y="13" fill="#FFF" rx="2"/>
+		    <circle cx="16" cy="9" r="2" fill="#FFF"/>
 		  </g>
 		</svg>
 	*/
@@ -54,8 +54,8 @@ public class FlatOptionPaneInformationIcon
 	@Override
 	protected Shape createInside() {
 		Path2D inside = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		inside.append( new Rectangle2D.Float( 14, 14, 4, 11 ), false );
-		inside.append( new Rectangle2D.Float( 14, 7, 4, 4 ), false );
+		inside.append( new RoundRectangle2D.Float( 14, 13, 4, 12, 4, 4 ), false );
+		inside.append( new Ellipse2D.Float( 14, 7, 4, 4 ), false );
 		return inside;
 	}
 }

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

@@ -16,10 +16,10 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Shape;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.awt.geom.Rectangle2D;
 
 /**
  * "Question" icon for {@link javax.swing.JOptionPane}.
@@ -40,8 +40,8 @@ public class FlatOptionPaneQuestionIcon
 		<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32">
 		  <g fill="none" fill-rule="evenodd">
 		    <circle cx="16" cy="16" r="14" fill="#389FD6"/>
-		    <rect width="4" height="4" x="14" y="22" fill="#FFF"/>
-		    <path fill="#FFF" d="M14,20 C14,20 18,20 18,20 C18,16 23,16 23,12 C23,8 20,6 16,6 C12,6 9,8 9,12 C9,12 13,12 13,12 C13,10 14,9 16,9 C18,9 19,10 19,12 C19,15 14,15 14,20 Z"/>
+		    <circle cx="16" cy="24" r="1.7" fill="#FFF"/>
+		    <path stroke="#FFF" stroke-linecap="round" stroke-width="3" d="M11.5,11.75 C11.75,9.5 13.75,8 16,8 C18.25,8 20.5,9.5 20.5,11.75 C20.5,14.75 16,15.5 16,19"/>
 		  </g>
 		</svg>
 	*/
@@ -53,21 +53,17 @@ public class FlatOptionPaneQuestionIcon
 
 	@Override
 	protected Shape createInside() {
-		Path2D q = new Path2D.Float();
-		q.moveTo( 14, 20 );
-		q.lineTo( 18, 20 );
-		q.curveTo( 18, 16, 23, 16, 23, 12 );
-		q.curveTo( 23, 8, 20, 6, 16, 6 );
-		q.curveTo( 12, 6, 9, 8, 9, 12 );
-		q.curveTo( 9, 12, 13, 12, 13, 12 );
-		q.curveTo( 13, 10, 14, 9, 16, 9 );
-		q.curveTo( 18, 9, 19, 10, 19, 12 );
-		q.curveTo( 19, 15, 14, 15, 14, 20 );
-		q.closePath();
+		Path2D q = new Path2D.Float( Path2D.WIND_NON_ZERO, 10 );
+		q.moveTo( 11.5,11.75 );
+		q.curveTo( 11.75,9.5, 13.75,8, 16,8 );
+		q.curveTo( 18.25,8, 20.5,9.5, 20.5,11.75 );
+		q.curveTo( 20.5,14.75, 16,15.5, 16,19 );
+
+		BasicStroke stroke = new BasicStroke( 3, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER );
 
 		Path2D inside = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		inside.append( new Rectangle2D.Float( 14, 22, 4, 4 ), false );
-		inside.append( q, false );
+		inside.append( new Ellipse2D.Float( 14.3f, 22.3f, 3.4f, 3.4f ), false );
+		inside.append( stroke.createStrokedShape( q ), false );
 		return inside;
 	}
 }

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

@@ -17,8 +17,9 @@
 package com.formdev.flatlaf.icons;
 
 import java.awt.Shape;
+import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.awt.geom.Rectangle2D;
+import java.awt.geom.RoundRectangle2D;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -39,23 +40,24 @@ public class FlatOptionPaneWarningIcon
 	/*
 		<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32">
 		  <g fill="none" fill-rule="evenodd">
-		    <polygon fill="#EDA200" points="16 2 31 28 1 28"/>
-		    <rect width="4" height="8" x="14" y="10" fill="#FFF"/>
-		    <rect width="4" height="4" x="14" y="21" fill="#FFF"/>
+		    <path fill="#EDA200" d="M17.7364863,3.038851 L30.2901269,25.0077221 C30.8381469,25.966757 30.5049534,27.1884663 29.5459185,27.7364863 C29.2437231,27.9091694 28.9016945,28 28.5536406,28 L3.44635936,28 C2.34178986,28 1.44635936,27.1045695 1.44635936,26 C1.44635936,25.6519461 1.53718999,25.3099175 1.70987307,25.0077221 L14.2635137,3.038851 C14.8115337,2.0798161 16.033243,1.74662265 16.9922779,2.29464259 C17.3023404,2.47182119 17.5593077,2.72878844 17.7364863,3.038851 Z"/>
+		    <rect width="4" height="11" x="14" y="8" fill="#FFF" rx="2"/>
+		    <circle cx="16" cy="23" r="2" fill="#FFF"/>
 		  </g>
 		</svg>
 	*/
 
 	@Override
 	protected Shape createOutside() {
-		return FlatUIUtils.createPath( 16,2, 31,28, 1,28 );
+		return FlatUIUtils.createRoundTrianglePath( 16,0, 32,28, 0,28, 4 );
+
 	}
 
 	@Override
 	protected Shape createInside() {
 		Path2D inside = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		inside.append( new Rectangle2D.Float( 14, 10, 4, 8 ), false );
-		inside.append( new Rectangle2D.Float( 14, 21, 4, 4 ), false );
+		inside.append( new RoundRectangle2D.Float( 14, 8, 4, 11, 4, 4 ), false );
+		inside.append( new Ellipse2D.Float( 14, 21, 4, 4 ), false );
 		return inside;
 	}
 }

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

@@ -46,6 +46,7 @@ public class FlatSearchIcon
 	@Styleable protected Color searchIconPressedColor = UIManager.getColor( "SearchField.searchIconPressedColor" );
 
 	private final boolean ignoreButtonState;
+	private Area area;
 
 	public FlatSearchIcon() {
 		this( false );
@@ -89,9 +90,11 @@ public class FlatSearchIcon
 				null, searchIconHoverColor, searchIconPressedColor ) );
 
 		// paint magnifier
-		Area area = new Area( new Ellipse2D.Float( 2, 2, 10, 10 ) );
-		area.subtract( new Area( new Ellipse2D.Float( 3, 3, 8, 8 ) ) );
-		area.add( new Area( FlatUIUtils.createPath( 10.813,9.75, 14,12.938, 12.938,14, 9.75,10.813 ) ) );
+		if( area == null ) {
+			area = new Area( new Ellipse2D.Float( 2, 2, 10, 10 ) );
+			area.subtract( new Area( new Ellipse2D.Float( 3, 3, 8, 8 ) ) );
+			area.add( new Area( FlatUIUtils.createPath( 10.813,9.75, 14,12.938, 12.938,14, 9.75,10.813 ) ) );
+		}
 		g.fill( area );
 	}
 }

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

@@ -21,7 +21,6 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
-import java.awt.geom.Line2D;
 import java.awt.geom.Path2D;
 import java.util.Map;
 import javax.swing.UIManager;
@@ -95,14 +94,16 @@ public class FlatTabbedPaneCloseIcon
 		Color fg = FlatButtonUI.buttonStateColor( c, closeForeground, null, null, closeHoverForeground, closePressedForeground );
 		g.setColor( FlatUIUtils.deriveColor( fg, c.getForeground() ) );
 
-		float mx = width / 2;
-		float my = height / 2;
+		float mx = width / 2f;
+		float my = height / 2f;
 		float r = ((bg != null) ? closeCrossFilledSize : closeCrossPlainSize) / 2;
 
 		// paint cross
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new Line2D.Float( mx - r, my - r, mx + r, my + r ), false );
-		path.append( new Line2D.Float( mx - r, my + r, mx + r, my - r ), false );
+		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD, 4 );
+		path.moveTo( mx - r, my - r );
+		path.lineTo( mx + r, my + r );
+		path.moveTo( mx - r, my + r );
+		path.lineTo( mx + r, my - r );
 		g.setStroke( new BasicStroke( closeCrossLineWidth ) );
 		g.draw( path );
 	}

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

@@ -18,8 +18,9 @@ package com.formdev.flatlaf.icons;
 
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Path2D;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
  * "closed" icon for {@link javax.swing.JTree} used by {@link javax.swing.tree.DefaultTreeCellRenderer}.
@@ -31,6 +32,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatTreeClosedIcon
 	extends FlatAbstractIcon
 {
+	private Path2D path;
+
 	public FlatTreeClosedIcon() {
 		super( 16, 16, UIManager.getColor( "Tree.icon.closedColor" ) );
 	}
@@ -41,10 +44,14 @@ public class FlatTreeClosedIcon
 
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-			  <polygon fill="#6E6E6E" fill-rule="evenodd" points="1 2 6 2 8 4 15 4 15 13 1 13"/>
+			  <path fill="none" stroke="#6E6E6E" d="M13,13.5 L3,13.5 C2.17157288,13.5 1.5,12.8284271 1.5,12 L1.5,4 C1.5,3.17157288 2.17157288,2.5 3,2.5 L6.29289322,2.5 C6.42550146,2.5 6.55267842,2.55267842 6.64644661,2.64644661 L8.5,4.5 L8.5,4.5 L13,4.5 C13.8284271,4.5 14.5,5.17157288 14.5,6 L14.5,12 C14.5,12.8284271 13.8284271,13.5 13,13.5 Z"/>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 1,2, 6,2, 8,4, 15,4, 15,13, 1,13 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+
+		if( path == null )
+			path = FlatFileViewDirectoryIcon.createFolderPath();
+		g.draw( path );
 	}
 }

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

@@ -16,9 +16,11 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.geom.Path2D;
 import java.util.function.Function;
 import javax.swing.JTree;
 import javax.swing.SwingUtilities;
@@ -39,6 +41,7 @@ public class FlatTreeCollapsedIcon
 	extends FlatAbstractIcon
 {
 	private final boolean chevron;
+	private Path2D path;
 
 	public FlatTreeCollapsedIcon() {
 		this( UIManager.getColor( "Tree.icon.collapsedColor" ) );
@@ -59,10 +62,15 @@ public class FlatTreeCollapsedIcon
 
 		if( chevron ) {
 			// chevron arrow
-			g.fill( FlatUIUtils.createPath( 3,1, 3,2.5, 6,5.5, 3,8.5, 3,10, 4.5,10, 9,5.5, 4.5,1 ) );
+			g.setStroke( new BasicStroke( 1f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER ) );
+			if( path == null )
+				path = FlatUIUtils.createPath( false, 3.5,1.5, 7.5,5.5, 3.5,9.5 );
+			g.draw( path );
 		} else {
 			// triangle arrow
-			g.fill( FlatUIUtils.createPath( 2,1, 2,10, 10,5.5 ) );
+			if( path == null )
+				path = FlatUIUtils.createPath( 2,1, 2,10, 10,5.5 );
+			g.fill( path );
 		}
 	}
 

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

@@ -16,10 +16,14 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Line2D;
+import java.awt.geom.RoundRectangle2D;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.ColorFunctions;
 
 /**
  * "leaf" icon for {@link javax.swing.JTree} used by {@link javax.swing.tree.DefaultTreeCellRenderer}.
@@ -42,13 +46,22 @@ public class FlatTreeLeafIcon
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
 			  <g fill="none" fill-rule="evenodd">
-			    <polygon fill="#6E6E6E" points="8 6 8 1 13 1 13 15 3 15 3 6"/>
-			    <polygon fill="#6E6E6E" points="3 5 7 5 7 1"/>
+			    <rect width="11" height="13" x="2.5" y="1.5" stroke="#6E6E6E" rx="1.5"/>
+			    <line x1="5.5" x2="10.5" y1="5.5" y2="5.5" stroke="#6E6E6E" stroke-linecap="round" stroke-opacity=".6"/>
+			    <line x1="5.5" x2="10.5" y1="8" y2="8" stroke="#6E6E6E" stroke-linecap="round" stroke-opacity=".6"/>
+			    <line x1="5.5" x2="10.5" y1="10.5" y2="10.5" stroke="#6E6E6E" stroke-linecap="round" stroke-opacity=".6"/>
 			  </g>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 8,6, 8,1, 13,1, 13,15, 3,15, 3,6 ) );
-		g.fill( FlatUIUtils.createPath( 3,5, 7,5, 7,1 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND ) );
+
+		g.draw( new RoundRectangle2D.Float( 2.5f, 1.5f, 11, 13, 3, 3 ) );
+
+		g.setColor( ColorFunctions.fade( g.getColor(), 0.6f ) );
+		g.draw( new Line2D.Float( 5.5f, 5.5f, 10.5f, 5.5f ) );
+		g.draw( new Line2D.Float( 5.5f, 8, 10.5f, 8 ) );
+		g.draw( new Line2D.Float( 5.5f, 10.5f, 10.5f, 10.5f ) );
 	}
 }

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

@@ -16,8 +16,11 @@
 
 package com.formdev.flatlaf.icons;
 
+import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Path2D;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
@@ -31,6 +34,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatTreeOpenIcon
 	extends FlatAbstractIcon
 {
+	private Path2D path;
+
 	public FlatTreeOpenIcon() {
 		super( 16, 16, UIManager.getColor( "Tree.icon.openColor" ) );
 	}
@@ -41,14 +46,38 @@ public class FlatTreeOpenIcon
 
 		/*
 			<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-			  <g fill="none" fill-rule="evenodd">
-			    <polygon fill="#6E6E6E" points="1 2 6 2 8 4 14 4 14 6 3.5 6 1 11"/>
-			    <polygon fill="#6E6E6E" points="4 7 16 7 13 13 1 13"/>
-			  </g>
+			  <path fill="none" stroke="#6E6E6E" d="M2,13.5 L4.11538462,8.42307692 C4.34828895,7.86410651 4.89444872,7.5 5.5,7.5 L14.75,7.5 C15.0261424,7.5 15.25,7.72385763 15.25,8 C15.25,8.06601301 15.2369281,8.13137261 15.2115385,8.19230769 L13.3846154,12.5769231 C13.151711,13.1358935 12.6055513,13.5 12,13.5 L3,13.5 C2.17157288,13.5 1.5,12.8284271 1.5,12 L1.5,4 C1.5,3.17157288 2.17157288,2.5 3,2.5 L6.29289322,2.5 C6.42550146,2.5 6.55267842,2.55267842 6.64644661,2.64644661 L8.5,4.5 L8.5,4.5 L12,4.5 C12.8284271,4.5 13.5,5.17157288 13.5,6 L13.5,6.5 L13.5,6.5"/>
 			</svg>
 		*/
 
-		g.fill( FlatUIUtils.createPath( 1,2, 6,2, 8,4, 14,4, 14,6, 3.5,6, 1,11 ) );
-		g.fill( FlatUIUtils.createPath( 4,7, 16,7, 13,13, 1,13 ) );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+		g.setStroke( new BasicStroke( 1, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER ) );
+
+		if( path == null ) {
+			double arc = 1.5;
+			double arc2 = 0.5;
+			path = FlatUIUtils.createPath( false,
+				// bottom-left of opend part
+				2,13.5,
+				// top-left of opend part
+				FlatUIUtils.ROUNDED, 4.5,7.5, arc,
+				// top-right of opend part
+				FlatUIUtils.ROUNDED, 15.5,7.5, arc2,
+
+				// bottom-right
+				FlatUIUtils.ROUNDED, 13,13.5, arc,
+				// bottom-left
+				1.5+arc,13.5,   FlatUIUtils.QUAD_TO, 1.5,13.5,  1.5,13.5-arc,
+				// top-left
+				1.5,2.5+arc,    FlatUIUtils.QUAD_TO, 1.5,2.5,   1.5+arc,2.5,
+				// top-mid-left
+				6.5-arc2,2.5,   FlatUIUtils.QUAD_TO, 6.5,2.5,   6.5+arc2,2.5+arc2,
+				// top-mid-right
+				8.5,4.5,
+				// top-right
+				13.5-arc,4.5,   FlatUIUtils.QUAD_TO, 13.5,4.5,  13.5,4.5+arc,
+				13.5,6.5 );
+		}
+		g.draw( path );
 	}
 }

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

@@ -21,7 +21,6 @@ import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
 import java.awt.RenderingHints;
-import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.HiDPIUtils;
@@ -30,6 +29,7 @@ import com.formdev.flatlaf.util.HiDPIUtils;
  * Base class for window icons.
  *
  * @uiDefault TitlePane.buttonSize						Dimension
+ * @uiDefault TitlePane.buttonSymbolHeight				int
  * @uiDefault TitlePane.buttonHoverBackground			Color
  * @uiDefault TitlePane.buttonPressedBackground			Color
  *
@@ -38,17 +38,22 @@ import com.formdev.flatlaf.util.HiDPIUtils;
 public abstract class FlatWindowAbstractIcon
 	extends FlatAbstractIcon
 {
+	private final int symbolHeight;
 	private final Color hoverBackground;
 	private final Color pressedBackground;
 
-	public FlatWindowAbstractIcon() {
-		this( UIManager.getDimension( "TitlePane.buttonSize" ),
-			UIManager.getColor( "TitlePane.buttonHoverBackground" ),
-			UIManager.getColor( "TitlePane.buttonPressedBackground" ) );
+	/** @since 3.2 */
+	protected FlatWindowAbstractIcon( String windowStyle ) {
+		this( FlatUIUtils.getSubUIDimension( "TitlePane.buttonSize", windowStyle ),
+			FlatUIUtils.getSubUIInt( "TitlePane.buttonSymbolHeight", windowStyle, 10 ),
+			FlatUIUtils.getSubUIColor( "TitlePane.buttonHoverBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.buttonPressedBackground", windowStyle ) );
 	}
 
-	public FlatWindowAbstractIcon( Dimension size, Color hoverBackground, Color pressedBackground ) {
+	/** @since 3.2 */
+	protected FlatWindowAbstractIcon( Dimension size, int symbolHeight, Color hoverBackground, Color pressedBackground ) {
 		super( size.width, size.height, null );
+		this.symbolHeight = symbolHeight;
 		this.hoverBackground = hoverBackground;
 		this.pressedBackground = pressedBackground;
 	}
@@ -80,4 +85,9 @@ public abstract class FlatWindowAbstractIcon
 	protected Color getForeground( Component c ) {
 		return c.getForeground();
 	}
+
+	/** @since 3.2 */
+	protected int getSymbolHeight() {
+		return symbolHeight;
+	}
 }

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

@@ -20,10 +20,9 @@ import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
-import java.awt.geom.Line2D;
 import java.awt.geom.Path2D;
-import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
+import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -39,27 +38,38 @@ import com.formdev.flatlaf.util.SystemInfo;
 public class FlatWindowCloseIcon
 	extends FlatWindowAbstractIcon
 {
-	private final Color hoverForeground = UIManager.getColor( "TitlePane.closeHoverForeground" );
-	private final Color pressedForeground = UIManager.getColor( "TitlePane.closePressedForeground" );
+	private final Color hoverForeground;
+	private final Color pressedForeground;
 
 	public FlatWindowCloseIcon() {
-		super( UIManager.getDimension( "TitlePane.buttonSize" ),
-			UIManager.getColor( "TitlePane.closeHoverBackground" ),
-			UIManager.getColor( "TitlePane.closePressedBackground" ) );
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowCloseIcon( String windowStyle ) {
+		super( FlatUIUtils.getSubUIDimension( "TitlePane.buttonSize", windowStyle ),
+			FlatUIUtils.getSubUIInt( "TitlePane.buttonSymbolHeight", windowStyle, 10 ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeHoverBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closePressedBackground", windowStyle ) );
+
+		hoverForeground = FlatUIUtils.getSubUIColor( "TitlePane.closeHoverForeground", windowStyle );
+		pressedForeground = FlatUIUtils.getSubUIColor( "TitlePane.closePressedForeground", windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (10 * scaleFactor);
+		int iwh = (int) (getSymbolHeight() * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
 		int ix2 = ix + iwh - 1;
 		int iy2 = iy + iwh - 1;
 		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
 
-		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new Line2D.Float( ix, iy, ix2, iy2 ), false );
-		path.append( new Line2D.Float( ix, iy2, ix2, iy ), false );
+		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD, 4 );
+		path.moveTo( ix, iy );
+		path.lineTo( ix2, iy2 );
+		path.moveTo( ix, iy2 );
+		path.lineTo( ix2, iy );
 		g.setStroke( new BasicStroke( thickness ) );
 		g.draw( path );
 	}

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

@@ -27,11 +27,17 @@ public class FlatWindowIconifyIcon
 	extends FlatWindowAbstractIcon
 {
 	public FlatWindowIconifyIcon() {
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowIconifyIcon( String windowStyle ) {
+		super( windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iw = (int) (10 * scaleFactor);
+		int iw = (int) (getSymbolHeight() * scaleFactor);
 		int ih = (int) scaleFactor;
 		int ix = x + ((width - iw) / 2);
 		int iy = y + ((height - ih) / 2);

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

@@ -29,11 +29,17 @@ public class FlatWindowMaximizeIcon
 	extends FlatWindowAbstractIcon
 {
 	public FlatWindowMaximizeIcon() {
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowMaximizeIcon( String windowStyle ) {
+		super( windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (10 * scaleFactor);
+		int iwh = (int) (getSymbolHeight() * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
 		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;

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

@@ -32,18 +32,24 @@ public class FlatWindowRestoreIcon
 	extends FlatWindowAbstractIcon
 {
 	public FlatWindowRestoreIcon() {
+		this( null );
+	}
+
+	/** @since 3.2 */
+	public FlatWindowRestoreIcon( String windowStyle ) {
+		super( windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (10 * scaleFactor);
+		int iwh = (int) (getSymbolHeight() * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
 		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
 		int arc = Math.max( (int) (1.5 * scaleFactor), 2 );
 		int arcOuter = (int) (arc + (1.5 * scaleFactor));
 
-		int rwh = (int) (8 * scaleFactor);
+		int rwh = (int) ((getSymbolHeight() - 2) * scaleFactor);
 		int ro2 = iwh - rwh;
 
 		// upper-right rectangle

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

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

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

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

flatlaf-core/src/main/java/com/formdev/flatlaf/themes/FlatMacDarkLaf.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2022 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.themes;
+
+import javax.swing.UIManager;
+import com.formdev.flatlaf.FlatDarkLaf;
+
+/**
+ * A Flat LaF that imitates macOS dark look.
+ * <p>
+ * The UI defaults are loaded from {@code FlatMacDarkLaf.properties},
+ * {@code FlatDarkLaf.properties} and {@code FlatLaf.properties}.
+ *
+ * @author Karl Tauber
+ * @since 3
+ */
+public class FlatMacDarkLaf
+	extends FlatDarkLaf
+{
+	public static final String NAME = "FlatLaf macOS Dark";
+
+	/**
+	 * Sets the application look and feel to this LaF
+	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
+	 */
+	public static boolean setup() {
+		return setup( new FlatMacDarkLaf() );
+	}
+
+	/**
+	 * Adds this look and feel to the set of available look and feels.
+	 * <p>
+	 * Useful if your application uses {@link UIManager#getInstalledLookAndFeels()}
+	 * to query available LaFs and display them to the user in a combobox.
+	 */
+	public static void installLafInfo() {
+		installLafInfo( NAME, FlatMacDarkLaf.class );
+	}
+
+	@Override
+	public String getName() {
+		return NAME;
+	}
+
+	@Override
+	public String getDescription() {
+		return "FlatLaf macOS Dark Look and Feel";
+	}
+
+	@Override
+	public boolean isDark() {
+		return true;
+	}
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/themes/FlatMacLightLaf.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2022 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.themes;
+
+import javax.swing.UIManager;
+import com.formdev.flatlaf.FlatLightLaf;
+
+/**
+ * A Flat LaF that imitates macOS light look.
+ * <p>
+ * The UI defaults are loaded from {@code FlatMacLightLaf.properties},
+ * {@code FlatLightLaf.properties} and {@code FlatLaf.properties}.
+ *
+ * @author Karl Tauber
+ * @since 3
+ */
+public class FlatMacLightLaf
+	extends FlatLightLaf
+{
+	public static final String NAME = "FlatLaf macOS Light";
+
+	/**
+	 * Sets the application look and feel to this LaF
+	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
+	 */
+	public static boolean setup() {
+		return setup( new FlatMacLightLaf() );
+	}
+
+	/**
+	 * Adds this look and feel to the set of available look and feels.
+	 * <p>
+	 * Useful if your application uses {@link UIManager#getInstalledLookAndFeels()}
+	 * to query available LaFs and display them to the user in a combobox.
+	 */
+	public static void installLafInfo() {
+		installLafInfo( NAME, FlatMacLightLaf.class );
+	}
+
+	@Override
+	public String getName() {
+		return NAME;
+	}
+
+	@Override
+	public String getDescription() {
+		return "FlatLaf macOS Light Look and Feel";
+	}
+
+	@Override
+	public boolean isDark() {
+		return false;
+	}
+}

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

@@ -25,6 +25,7 @@ import java.awt.Graphics2D;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import javax.swing.JComponent;
+import javax.swing.SwingUtilities;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicArrowButton;
 
@@ -48,8 +49,10 @@ public class FlatArrowButton
 	protected Color pressedBackground;
 
 	private int arrowWidth = DEFAULT_ARROW_WIDTH;
+	private float arrowThickness = 1;
 	private float xOffset = 0;
 	private float yOffset = 0;
+	private boolean roundBorderAutoXOffset = true;
 
 	private boolean hover;
 	private boolean pressed;
@@ -82,14 +85,18 @@ public class FlatArrowButton
 
 				@Override
 				public void mousePressed( MouseEvent e ) {
-					pressed = true;
-					repaint();
+					if( SwingUtilities.isLeftMouseButton( e ) ) {
+						pressed = true;
+						repaint();
+					}
 				}
 
 				@Override
 				public void mouseReleased( MouseEvent e ) {
-					pressed = false;
-					repaint();
+					if( SwingUtilities.isLeftMouseButton( e ) ) {
+						pressed = false;
+						repaint();
+					}
 				}
 			} );
 		}
@@ -116,6 +123,16 @@ public class FlatArrowButton
 		this.arrowWidth = arrowWidth;
 	}
 
+	/** @since 3 */
+	public float getArrowThickness() {
+		return arrowThickness;
+	}
+
+	/** @since 3 */
+	public void setArrowThickness( float arrowThickness ) {
+		this.arrowThickness = arrowThickness;
+	}
+
 	protected boolean isHover() {
 		return hover;
 	}
@@ -140,6 +157,16 @@ public class FlatArrowButton
 		this.yOffset = yOffset;
 	}
 
+	/** @since 3 */
+	public boolean isRoundBorderAutoXOffset() {
+		return roundBorderAutoXOffset;
+	}
+
+	/** @since 3 */
+	public void setRoundBorderAutoXOffset( boolean roundBorderAutoXOffset ) {
+		this.roundBorderAutoXOffset = roundBorderAutoXOffset;
+	}
+
 	protected Color deriveBackground( Color background ) {
 		return background;
 	}
@@ -203,14 +230,17 @@ public class FlatArrowButton
 	}
 
 	protected void paintArrow( Graphics2D g ) {
-		boolean vert = (direction == NORTH || direction == SOUTH);
 		int x = 0;
 
 		// move arrow for round borders
-		Container parent = getParent();
-		if( vert && parent instanceof JComponent && FlatUIUtils.hasRoundBorder( (JComponent) parent ) )
-			x -= scale( parent.getComponentOrientation().isLeftToRight() ? 1 : -1 );
+		if( isRoundBorderAutoXOffset() ) {
+			Container parent = getParent();
+			boolean vert = (direction == NORTH || direction == SOUTH);
+			if( vert && parent instanceof JComponent && FlatUIUtils.hasRoundBorder( (JComponent) parent ) )
+				x -= scale( parent.getComponentOrientation().isLeftToRight() ? 1 : -1 );
+		}
 
-		FlatUIUtils.paintArrow( g, x, 0, getWidth(), getHeight(), getDirection(), chevron, getArrowWidth(), getXOffset(), getYOffset() );
+		FlatUIUtils.paintArrow( g, x, 0, getWidth(), getHeight(), getDirection(), chevron,
+			getArrowWidth(), getArrowThickness(), getXOffset(), getYOffset() );
 	}
 }

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

@@ -20,6 +20,7 @@ import static com.formdev.flatlaf.FlatClientProperties.*;
 import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Color;
 import java.awt.Component;
+import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Font;
 import java.awt.FontMetrics;
@@ -45,11 +46,15 @@ import javax.swing.LookAndFeel;
 import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
 import javax.swing.plaf.ButtonUI;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.ToolBarUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicButtonListener;
 import javax.swing.plaf.basic.BasicButtonUI;
+import javax.swing.plaf.basic.BasicHTML;
+import javax.swing.text.View;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.icons.FlatHelpButtonIcon;
@@ -359,6 +364,9 @@ public class FlatButtonUI
 			return ((FlatHelpButtonIcon)helpButtonIcon).applyStyleProperty( key, value );
 		}
 
+		if( "iconTextGap".equals( key ) && value instanceof Integer )
+			value = UIScale.scale( (Integer) value );
+
 		if( borderShared == null )
 			borderShared = new AtomicBoolean( true );
 		return FlatStylingSupport.applyToAnnotatedObjectOrBorder( this, key, value, b, borderShared );
@@ -545,9 +553,45 @@ public class FlatButtonUI
 		}
 	}
 
+	/**
+	 * Similar to BasicButtonUI.paint(), but does not use zero insets for HTML text,
+	 * which is done in BasicButtonUI.layout() since Java 19.
+	 * See https://github.com/openjdk/jdk/pull/8407
+	 * and https://github.com/openjdk/jdk/pull/8407#issuecomment-1761583430
+	 */
 	@Override
 	public void paint( Graphics g, JComponent c ) {
-		super.paint( FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c ), c );
+		g = FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c );
+
+		AbstractButton b = (AbstractButton) c;
+
+		// layout
+		String clippedText = layout( b, b.getFontMetrics( b.getFont() ), b.getWidth(), b.getHeight() );
+
+		// not used in FlatLaf, but invoked for compatibility with BasicButtonUI.paint()
+		clearTextShiftOffset();
+
+		// not used in FlatLaf, but invoked for compatibility with BasicButtonUI.paint()
+		ButtonModel model = b.getModel();
+		if( model.isArmed() && model.isPressed() )
+			paintButtonPressed( g, b );
+
+		// paint icon
+		if( b.getIcon() != null )
+			paintIcon( g, b, iconR );
+
+		// paint text
+		if( clippedText != null && !clippedText.isEmpty() ) {
+			View view = (View) b.getClientProperty( BasicHTML.propertyKey );
+			if( view != null )
+				view.paint( g, textR ); // HTML text
+			else
+				paintText( g, b, textR, clippedText );
+		}
+
+		// not used in FlatLaf, but invoked for compatibility with BasicButtonUI.paint()
+		if( b.isFocusPainted() && b.hasFocus() )
+			paintFocus( g, b, viewR, textR, iconR );
 	}
 
 	@Override
@@ -780,6 +824,67 @@ public class FlatButtonUI
 		return margin instanceof UIResource && Objects.equals( margin, defaultMargin );
 	}
 
+	@Override
+	public int getBaseline( JComponent c, int width, int height ) {
+		return getBaselineImpl( c, width, height );
+	}
+
+	/**
+	 * Similar to BasicButtonUI.getBaseline(), but does not use zero insets for HTML text,
+	 * which is done in BasicButtonUI.layout() since Java 19.
+	 * See https://github.com/openjdk/jdk/pull/8407
+	 * and https://github.com/openjdk/jdk/pull/8407#issuecomment-1761583430
+	 */
+	static int getBaselineImpl( JComponent c, int width, int height ) {
+		if( width < 0 || height < 0 )
+			throw new IllegalArgumentException();
+
+		AbstractButton b = (AbstractButton) c;
+		String text = b.getText();
+		if( text == null || text.isEmpty() )
+			return -1;
+
+		FontMetrics fm = b.getFontMetrics( b.getFont() );
+		layout( b, fm, width, height );
+
+		View view = (View) b.getClientProperty( BasicHTML.propertyKey );
+		if( view != null ) {
+			// HTML text
+			int baseline = BasicHTML.getHTMLBaseline( view, textR.width, textR.height );
+			return (baseline >= 0) ? textR.y + baseline : baseline;
+		} else
+			return textR.y + fm.getAscent();
+	}
+
+	/**
+	 * Similar to BasicButtonUI.layout(), but does not use zero insets for HTML text,
+	 * which is done in BasicButtonUI.layout() since Java 19.
+	 * See https://github.com/openjdk/jdk/pull/8407
+	 * and https://github.com/openjdk/jdk/pull/8407#issuecomment-1761583430
+	 */
+	private static String layout( AbstractButton b, FontMetrics fm, int width, int height ) {
+		// compute view rectangle
+		Insets insets = b.getInsets();
+		viewR.setBounds( insets.left, insets.top,
+			width - insets.left - insets.right,
+			height - insets.top - insets.bottom );
+
+		// reset rectangles
+		textR.setBounds( 0, 0, 0, 0 );
+		iconR.setBounds( 0, 0, 0, 0 );
+
+		String text = b.getText();
+		return SwingUtilities.layoutCompoundLabel( b, fm, text, b.getIcon(),
+			b.getVerticalAlignment(), b.getHorizontalAlignment(),
+			b.getVerticalTextPosition(), b.getHorizontalTextPosition(),
+			viewR, iconR, textR,
+			(text != null) ? b.getIconTextGap() : 0 );
+	}
+
+	private static Rectangle viewR = new Rectangle();
+	private static Rectangle textR = new Rectangle();
+	private static Rectangle iconR = new Rectangle();
+
 	//---- class FlatButtonListener -------------------------------------------
 
 	protected class FlatButtonListener
@@ -797,5 +902,20 @@ public class FlatButtonUI
 			super.propertyChange( e );
 			FlatButtonUI.this.propertyChange( b, e );
 		}
+
+		@Override
+		public void stateChanged( ChangeEvent e ) {
+			super.stateChanged( e );
+
+			// if button is in toolbar, repaint button groups
+			AbstractButton b = (AbstractButton) e.getSource();
+			Container parent = b.getParent();
+			if( parent instanceof JToolBar ) {
+				JToolBar toolBar = (JToolBar) parent;
+				ToolBarUI ui = toolBar.getUI();
+				if( ui instanceof FlatToolBarUI )
+					((FlatToolBarUI)ui).repaintButtonGroup( b );
+			}
+		}
 	}
 }

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

@@ -256,10 +256,14 @@ public class FlatCaret
 		// select all
 		if( c instanceof JFormattedTextField ) {
 			EventQueue.invokeLater( () -> {
-				if( getComponent() == null )
+				// Warning: do not use variables from outside of this runnable
+				//          because they may be out-of-date when this runnable is executed
+
+				JTextComponent c2 = getComponent();
+				if( c2 == null )
 					return; // was deinstalled
 
-				select( 0, doc.getLength() );
+				select( 0, c2.getDocument().getLength() );
 			} );
 		} else {
 			select( 0, doc.getLength() );

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

@@ -24,6 +24,7 @@ import java.awt.Component;
 import java.awt.ComponentOrientation;
 import java.awt.Container;
 import java.awt.Dimension;
+import java.awt.EventQueue;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -48,10 +49,12 @@ import java.util.concurrent.atomic.AtomicBoolean;
 import javax.swing.AbstractAction;
 import javax.swing.BorderFactory;
 import javax.swing.CellRendererPane;
+import javax.swing.ComboBoxModel;
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.InputMap;
 import javax.swing.JButton;
 import javax.swing.JComboBox;
+import javax.swing.JComboBox.KeySelectionManager;
 import javax.swing.JComponent;
 import javax.swing.JList;
 import javax.swing.JPanel;
@@ -70,6 +73,7 @@ import javax.swing.plaf.basic.BasicComboBoxUI;
 import javax.swing.plaf.basic.BasicComboPopup;
 import javax.swing.plaf.basic.ComboPopup;
 import javax.swing.text.JTextComponent;
+import com.formdev.flatlaf.icons.FlatCheckBoxMenuItemIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
@@ -99,9 +103,8 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @uiDefault ComboBox.minimumWidth				int
  * @uiDefault ComboBox.editorColumns			int
  * @uiDefault ComboBox.maximumRowCount			int
- * @uiDefault ComboBox.buttonStyle				String	auto (default), button or none
+ * @uiDefault ComboBox.buttonStyle				String	auto (default), button, mac or none
  * @uiDefault Component.arrowType				String	chevron (default) or triangle
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault ComboBox.editableBackground		Color	optional; defaults to ComboBox.background
  * @uiDefault ComboBox.focusedBackground		Color	optional
  * @uiDefault ComboBox.disabledBackground		Color
@@ -117,6 +120,9 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @uiDefault ComboBox.buttonHoverArrowColor	Color
  * @uiDefault ComboBox.buttonPressedArrowColor	Color
  * @uiDefault ComboBox.popupBackground			Color	optional
+ * @uiDefault ComboBox.popupInsets				Insets
+ * @uiDefault ComboBox.selectionInsets			Insets
+ * @uiDefault ComboBox.selectionArc				int
  *
  * @author Karl Tauber
  */
@@ -130,7 +136,6 @@ public class FlatComboBoxUI
 	@Styleable protected int editorColumns;
 	@Styleable protected String buttonStyle;
 	@Styleable protected String arrowType;
-	protected boolean isIntelliJTheme;
 
 	private Color background;
 	@Styleable protected Color editableBackground;
@@ -150,6 +155,9 @@ public class FlatComboBoxUI
 	@Styleable protected Color buttonPressedArrowColor;
 
 	@Styleable protected Color popupBackground;
+	/** @since 3 */ @Styleable protected Insets popupInsets;
+	/** @since 3 */ @Styleable protected Insets selectionInsets;
+	/** @since 3 */ @Styleable protected int selectionArc;
 
 	private MouseListener hoverListener;
 	protected boolean hover;
@@ -175,6 +183,9 @@ public class FlatComboBoxUI
 	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
+		// install key selection manager that shows popup when Space key is pressed
+		comboBox.setKeySelectionManager( new FlatKeySelectionManager( comboBox.getKeySelectionManager() ) );
+
 		installStyle();
 	}
 
@@ -233,7 +244,6 @@ public class FlatComboBoxUI
 		editorColumns = UIManager.getInt( "ComboBox.editorColumns" );
 		buttonStyle = UIManager.getString( "ComboBox.buttonStyle" );
 		arrowType = UIManager.getString( "Component.arrowType" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 
 		background = UIManager.getColor( "ComboBox.background" );
 		editableBackground = UIManager.getColor( "ComboBox.editableBackground" );
@@ -253,6 +263,9 @@ public class FlatComboBoxUI
 		buttonPressedArrowColor = UIManager.getColor( "ComboBox.buttonPressedArrowColor" );
 
 		popupBackground = UIManager.getColor( "ComboBox.popupBackground" );
+		popupInsets = UIManager.getInsets( "ComboBox.popupInsets" );
+		selectionInsets = UIManager.getInsets( "ComboBox.selectionInsets" );
+		selectionArc = UIManager.getInt( "ComboBox.selectionArc" );
 
 		// set maximumRowCount
 		int maximumRowCount = UIManager.getInt( "ComboBox.maximumRowCount" );
@@ -308,11 +321,14 @@ public class FlatComboBoxUI
 					// limit button width to height of a raw combobox (without insets)
 					FontMetrics fm = comboBox.getFontMetrics( comboBox.getFont() );
 					int maxButtonWidth = fm.getHeight() + scale( padding.top ) + scale( padding.bottom );
+					int minButtonWidth = (maxButtonWidth * 3) / 4;
 
+					// make button square (except if width is limited)
 					Insets insets = getInsets();
-					int buttonWidth = Math.min( parent.getPreferredSize().height - insets.top - insets.bottom, maxButtonWidth );
+					int buttonWidth = Math.min( Math.max( parent.getHeight() - insets.top - insets.bottom, minButtonWidth ), maxButtonWidth );
+
 					if( buttonWidth != arrowButton.getWidth() ) {
-						// set width of arrow button to preferred height of combobox
+						// set width of arrow button
 						int xOffset = comboBox.getComponentOrientation().isLeftToRight()
 							? arrowButton.getWidth() - buttonWidth
 							: 0;
@@ -556,7 +572,9 @@ public class FlatComboBoxUI
 		int height = c.getHeight();
 		int arrowX = arrowButton.getX();
 		int arrowWidth = arrowButton.getWidth();
-		boolean paintButton = (comboBox.isEditable() || "button".equals( buttonStyle )) && !"none".equals( buttonStyle );
+		boolean paintButton = (comboBox.isEditable() || "button".equals( buttonStyle )) &&
+			!"none".equals( buttonStyle ) &&
+			!isMacStyle();
 		boolean enabled = comboBox.isEnabled();
 		boolean isLeftToRight = comboBox.getComponentOrientation().isLeftToRight();
 
@@ -574,13 +592,21 @@ public class FlatComboBoxUI
 						: buttonBackground;
 				if( buttonColor != null ) {
 					g2.setColor( buttonColor );
-					Shape oldClip = g2.getClip();
-					if( isLeftToRight )
-						g2.clipRect( arrowX, 0, width - arrowX, height );
-					else
-						g2.clipRect( 0, 0, arrowX + arrowWidth, height );
-					FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
-					g2.setClip( oldClip );
+					if( isMacStyle() ) {
+						Insets insets = comboBox.getInsets();
+						int gap = scale( 2 );
+						FlatUIUtils.paintComponentBackground( g2, arrowX + gap, insets.top + gap,
+							arrowWidth - (gap * 2), height - insets.top - insets.bottom - (gap * 2),
+							0, arc - focusWidth );
+					} else {
+						Shape oldClip = g2.getClip();
+						if( isLeftToRight )
+							g2.clipRect( arrowX, 0, width - arrowX, height );
+						else
+							g2.clipRect( 0, 0, arrowX + arrowWidth, height );
+						FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
+						g2.setClip( oldClip );
+					}
 				}
 			}
 
@@ -656,7 +682,7 @@ public class FlatComboBoxUI
 
 			return (editableBackground != null && comboBox.isEditable()) ? editableBackground : background;
 		} else
-			return isIntelliJTheme ? FlatUIUtils.getParentBackground( comboBox ) : disabledBackground;
+			return disabledBackground;
 	}
 
 	protected Color getForeground( boolean enabled ) {
@@ -719,6 +745,10 @@ public class FlatComboBoxUI
 		return parentParent != null && !comboBox.getBackground().equals( parentParent.getBackground() );
 	}
 
+	private boolean isMacStyle() {
+		return "mac".equals( buttonStyle );
+	}
+
 	/** @since 1.3 */
 	public static boolean isPermanentFocusOwner( JComboBox<?> comboBox ) {
 		if( comboBox.isEditable() ) {
@@ -753,6 +783,21 @@ public class FlatComboBoxUI
 				buttonHoverArrowColor, null, buttonPressedArrowColor, null );
 		}
 
+		@Override
+		public int getArrowWidth() {
+			return isMacStyle() ? (getWidth() % 2 == 0 ? 6 : 7) : super.getArrowWidth();
+		}
+
+		@Override
+		public float getArrowThickness() {
+			return isMacStyle() ? 1.5f : super.getArrowThickness();
+		}
+
+		@Override
+		public boolean isRoundBorderAutoXOffset() {
+			return isMacStyle() ? false : super.isRoundBorderAutoXOffset();
+		}
+
 		@Override
 		protected boolean isHover() {
 			return super.isHover() || (!comboBox.isEditable() ? hover : false);
@@ -770,6 +815,20 @@ public class FlatComboBoxUI
 
 			return super.getArrowColor();
 		}
+
+		@Override
+		protected void paintArrow( Graphics2D g ) {
+			if( isMacStyle() && !comboBox.isEditable() ) {
+				// for style "mac", paint up and down arrows if combobox is not editable
+				int height = getHeight();
+				int h = Math.round( height / 2f );
+				FlatUIUtils.paintArrow( g, 0, 0, getWidth(), h, SwingConstants.NORTH, chevron,
+					getArrowWidth(), getArrowThickness(), getXOffset(), getYOffset() + 1.25f );
+				FlatUIUtils.paintArrow( g, 0, height - h, getWidth(), h, SwingConstants.SOUTH, chevron,
+					getArrowWidth(), getArrowThickness(), getXOffset(), getYOffset() - 1.25f );
+			} else
+				super.paintArrow( g );
+		}
 	}
 
 	//---- class FlatComboPopup -----------------------------------------------
@@ -804,12 +863,19 @@ public class FlatComboBoxUI
 				}
 			}
 
+			// for style "mac", add width of "checked item" icon
+			boolean isPopupOverComboBox = isPopupOverComboBox();
+			int selectedIndex = -1;
+			if( isPopupOverComboBox && (selectedIndex = comboBox.getSelectedIndex()) >= 0 )
+				displayWidth += MacCheckedItemIcon.INSTANCE.getIconWidth() + scale( CellPaddingBorder.MAC_STYLE_GAP );
+
 			// add width of vertical scroll bar
 			JScrollBar verticalScrollBar = scroller.getVerticalScrollBar();
 			if( verticalScrollBar != null )
 				displayWidth += verticalScrollBar.getPreferredSize().width;
 
 			// make popup wider if necessary
+			int pw0 = pw;
 			if( displayWidth > pw ) {
 				// limit popup width to screen width
 				GraphicsConfiguration gc = comboBox.getGraphicsConfiguration();
@@ -829,6 +895,30 @@ public class FlatComboBoxUI
 					px -= diff;
 			}
 
+			// for style "mac", place popup over combobox
+			Rectangle cellBounds;
+			if( isPopupOverComboBox && selectedIndex >= 0 &&
+				(cellBounds = list.getCellBounds( 0, 0 )) != null )
+			{
+				Insets comboBoxInsets = comboBox.getInsets();
+				Insets listInsets = list.getInsets();
+				Insets popupInsets = getInsets();
+
+				// position popup so that selected item is at same Y position as combobox
+				py -= (cellBounds.height * (selectedIndex + 1)) + comboBoxInsets.top + listInsets.top + popupInsets.top;
+
+				// position popup slightly to the left so that a small part of the right side of the combobox stays visible
+				int offset = Math.min( pw - pw0, MacCheckedItemIcon.INSTANCE.getIconWidth() ) + scale( 4 );
+				if( comboBox.getComponentOrientation().isLeftToRight() )
+					px -= offset + comboBoxInsets.right + listInsets.right;
+				else
+					px += offset + comboBoxInsets.left + listInsets.left;
+
+				// not invoking super.computePopupBounds() here to let
+				// JPopupMenu.adjustPopupLocationToFitScreen() fix the location if necessary
+				return new Rectangle( px, py, pw, ph );
+			}
+
 			return super.computePopupBounds( px, py, pw, ph );
 		}
 
@@ -839,17 +929,12 @@ public class FlatComboBoxUI
 			// make opaque to avoid that background shines thru border (e.g. at 150% scaling)
 			setOpaque( true );
 
-	        // set popup border
-	        // use non-UIResource to avoid that it is overwritten when making
-	        // popup visible (see JPopupMenu.setInvoker()) in theme editor preview
+			// set popup border
+			// use non-UIResource to avoid that it is overwritten when making
+			// popup visible (see JPopupMenu.setInvoker()) in theme editor preview
 			Border border = UIManager.getBorder( "PopupMenu.border" );
 			if( border != null )
 				setBorder( FlatUIUtils.nonUIResource( border ) );
-		}
-
-		@Override
-		protected void configureList() {
-			super.configureList();
 
 			list.setCellRenderer( new PopupListCellRenderer() );
 			updateStyle();
@@ -857,12 +942,21 @@ public class FlatComboBoxUI
 
 		void updateStyle() {
 			if( popupBackground != null )
-		        list.setBackground( popupBackground );
+				list.setBackground( popupBackground );
 
-	        // set popup background because it may shine thru when scaled (e.g. at 150%)
-	        // use non-UIResource to avoid that it is overwritten when making
-	        // popup visible (see JPopupMenu.setInvoker()) in theme editor preview
-	        setBackground( FlatUIUtils.nonUIResource( list.getBackground() ) );
+			// set popup background because it may shine thru when scaled (e.g. at 150%)
+			// use non-UIResource to avoid that it is overwritten when making
+			// popup visible (see JPopupMenu.setInvoker()) in theme editor preview
+			setBackground( FlatUIUtils.nonUIResource( list.getBackground() ) );
+
+			scroller.setViewportBorder( (popupInsets != null) ? new FlatEmptyBorder( popupInsets ) : null );
+			scroller.setOpaque( false );
+
+			if( list.getUI() instanceof FlatListUI ) {
+				FlatListUI ui = (FlatListUI) list.getUI();
+				ui.selectionInsets = selectionInsets;
+				ui.selectionArc = selectionArc;
+			}
 		}
 
 		@Override
@@ -895,6 +989,29 @@ public class FlatComboBoxUI
 				}
 			}
 
+			// improve location of selected item in popup if list is large and scrollable
+			if( list.getHeight() == 0 ) {
+				// If popup is shown for the first time (or after a laf switch) and is scrollable,
+				// then BasicComboPopup scrolls the selected item to the top of the visible area.
+				// But for usability it would be better to have selected item somewhere
+				// in the middle of the visible area so that the user can see items above
+				// the selected item, which are usually more "important".
+
+				int selectedIndex = list.getSelectedIndex();
+				if( selectedIndex >= 1 ) {
+					int maximumRowCount = comboBox.getMaximumRowCount();
+					if( selectedIndex < maximumRowCount ) {
+						// selected item is in the first visible items --> scroll to top
+						list.scrollRectToVisible( new Rectangle() );
+					} else {
+						// scroll the selected item to the middle of the visible area
+						int firstVisibleIndex = Math.max( selectedIndex - (maximumRowCount / 2), 0 );
+						if( firstVisibleIndex > 0 )
+							list.ensureIndexIsVisible( firstVisibleIndex );
+					}
+				}
+			}
+
 			super.show( invoker, x, y );
 		}
 
@@ -904,6 +1021,15 @@ public class FlatComboBoxUI
 			paddingBorder.uninstall();
 		}
 
+		private boolean isPopupOverComboBox() {
+			return isMacStyle() &&
+				!comboBox.isEditable() &&
+				comboBox.getItemCount() > 0 &&
+				comboBox.getItemCount() <= comboBox.getMaximumRowCount() &&
+				// for compatibility with Aqua Laf
+				!clientPropertyBoolean( comboBox, "JComboBox.isPopDown", false );
+		}
+
 		//---- class PopupListCellRenderer -----
 
 		private class PopupListCellRenderer
@@ -921,6 +1047,13 @@ public class FlatComboBoxUI
 				Component c = renderer.getListCellRendererComponent( list, value, index, isSelected, cellHasFocus );
 				c.applyComponentOrientation( comboBox.getComponentOrientation() );
 
+				// style "mac"
+				if( isPopupOverComboBox() && c instanceof JComponent ) {
+					int selectedIndex = comboBox.getSelectedIndex();
+					((JComponent)c).putClientProperty( CellPaddingBorder.KEY_MAC_STYLE_HINT,
+						(selectedIndex >= 0) ? (index == selectedIndex) : null );
+				}
+
 				paddingBorder.install( c, Math.round( FlatUIUtils.getBorderFocusWidth( comboBox ) ) );
 
 				return c;
@@ -937,10 +1070,16 @@ public class FlatComboBoxUI
 	 * which vertically aligns text in popup list with text in combobox.
 	 * <p>
 	 * The renderer border is painted on the outer side of this border.
+	 * <p>
+	 * For button style "mac", also used to increase insets on left side for
+	 * "checked item" icon and to paint "checked item" icon for selected combobox item.
 	 */
 	private static class CellPaddingBorder
 		extends AbstractBorder
 	{
+		static final String KEY_MAC_STYLE_HINT = "FlatLaf.internal.FlatComboBoxUI.macStyleHint";
+		static final int MAC_STYLE_GAP = 4;
+
 		private Insets padding;
 		private JComponent rendererComponent;
 		private Border rendererBorder;
@@ -990,6 +1129,8 @@ public class FlatComboBoxUI
 			if( rendererComponent == null )
 				return;
 
+			rendererComponent.putClientProperty( KEY_MAC_STYLE_HINT, null );
+
 			if( rendererComponent.getBorder() == this )
 				rendererComponent.setBorder( rendererBorder );
 			rendererComponent = null;
@@ -1017,6 +1158,18 @@ public class FlatComboBoxUI
 			insets.left += focusWidth;
 			insets.right += focusWidth;
 
+			// style "mac"
+			if( c instanceof JComponent ) {
+				Boolean macStyleHint = clientPropertyBooleanStrict( (JComponent) c, KEY_MAC_STYLE_HINT, null );
+				if( macStyleHint != null ) {
+					int indent = MacCheckedItemIcon.INSTANCE.getIconWidth() + scale( MAC_STYLE_GAP );
+					if( c.getComponentOrientation().isLeftToRight() )
+						insets.left += indent;
+					else
+						insets.right += indent;
+				}
+			}
+
 			return insets;
 		}
 
@@ -1024,6 +1177,35 @@ public class FlatComboBoxUI
 		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 			if( rendererBorder != null )
 				rendererBorder.paintBorder( c, g, x, y, width, height );
+
+			// style "mac"
+			if( c instanceof JComponent ) {
+				Boolean macStyleHint = clientPropertyBooleanStrict( (JComponent) c, KEY_MAC_STYLE_HINT, null );
+				if( macStyleHint == Boolean.TRUE ) {
+					// paint "checked item" icon
+					int ix = c.getComponentOrientation().isLeftToRight()
+						? x + scale( padding.left )
+						: x + width - scale( padding.right ) - MacCheckedItemIcon.INSTANCE.getIconWidth();
+					MacCheckedItemIcon.INSTANCE.paintIcon( c, g, ix, y + ((height - MacCheckedItemIcon.INSTANCE.getIconHeight()) / 2) );
+				}
+			}
+		}
+	}
+
+	//---- class MacCheckedItemIcon -------------------------------------------
+
+	/**
+	 * Use for style "mac" to mark checked item.
+	 */
+	private static class MacCheckedItemIcon
+		extends FlatCheckBoxMenuItemIcon
+	{
+		static MacCheckedItemIcon INSTANCE = new MacCheckedItemIcon();
+
+		@Override
+		protected void paintIcon( Component c, Graphics2D g2 ) {
+			g2.setColor( c.getForeground() );
+			paintCheckmark( g2 );
 		}
 	}
 
@@ -1053,4 +1235,46 @@ public class FlatComboBoxUI
 			}
 		}
 	}
+
+	//---- class FlatKeySelectionManager --------------------------------------
+
+	/**
+	 * Key selection manager that delegates to the default manager.
+	 * Shows the popup if Space key is pressed and "typed characters" buffer is empty.
+	 * If items contain spaces (e.g. "a b") it is still possible to select them
+	 * by pressing keys a, Space and b.
+	 */
+	private class FlatKeySelectionManager
+		implements JComboBox.KeySelectionManager, UIResource
+	{
+		private final KeySelectionManager delegate;
+		private final long timeFactor;
+		private long lastTime;
+
+		FlatKeySelectionManager( JComboBox.KeySelectionManager delegate ) {
+			this.delegate = delegate;
+
+			Long value = (Long) UIManager.get( "ComboBox.timeFactor" );
+			timeFactor = (value != null) ? value : 1000;
+		}
+
+		@SuppressWarnings( "rawtypes" )
+		@Override
+		public int selectionForKey( char aKey, ComboBoxModel aModel ) {
+			long time = EventQueue.getMostRecentEventTime();
+			long oldLastTime = lastTime;
+			lastTime = time;
+
+			// SPACE key shows popup if not yet visible
+			if( aKey == ' ' &&
+				time - oldLastTime >= timeFactor &&
+				!comboBox.isPopupVisible() )
+			{
+				comboBox.setPopupVisible( true );
+				return -1;
+			}
+
+			return delegate.selectionForKey( aKey, aModel );
+		}
+	}
 }

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

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

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

@@ -29,6 +29,7 @@ import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.io.File;
 import java.lang.reflect.Method;
+import java.util.ArrayList;
 import java.util.function.Function;
 import javax.swing.AbstractButton;
 import javax.swing.Box;
@@ -53,6 +54,7 @@ import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.metal.MetalFileChooserUI;
 import javax.swing.table.TableCellRenderer;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.icons.FlatFileViewDirectoryIcon;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.ScaledImageIcon;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -243,11 +245,13 @@ public class FlatFileChooserUI
 			borderLayout.setHgap( 8 );
 
 			Component north = borderLayout.getLayoutComponent( BorderLayout.NORTH );
+			Component lineEnd = borderLayout.getLayoutComponent( BorderLayout.LINE_END );
 			Component center = borderLayout.getLayoutComponent( BorderLayout.CENTER );
 			Component south = borderLayout.getLayoutComponent( BorderLayout.SOUTH );
-			if( north != null && center != null && south != null ) {
+			if( north != null && lineEnd != null && center != null && south != null ) {
 				JPanel p = new JPanel( new BorderLayout( 0, 11 ) );
 				p.add( north, BorderLayout.NORTH );
+				p.add( lineEnd, BorderLayout.LINE_END );
 				p.add( center, BorderLayout.CENTER );
 				p.add( south, BorderLayout.SOUTH );
 				fc.add( p, BorderLayout.CENTER );
@@ -344,12 +348,12 @@ public class FlatFileChooserUI
 			fileView.clearIconCache();
 	}
 
-	private boolean doNotUseSystemIcons() {
+	private static boolean doNotUseSystemIcons() {
 		// Java 17 32bit craches on Windows when using system icons
-		// fixed in Java 18+ (see https://bugs.openjdk.java.net/browse/JDK-8277299)
+		// fixed in Java 18+, fix backported in Java 17.0.3+ (see https://bugs.openjdk.java.net/browse/JDK-8277299)
 		return SystemInfo.isWindows &&
 			SystemInfo.isX86 &&
-			(SystemInfo.isJava_17_orLater && !SystemInfo.isJava_18_orLater);
+			(SystemInfo.isJava_17_orLater && SystemInfo.javaVersion < SystemInfo.toVersion( 17, 0, 3, 0 ));
 	}
 
 	//---- class FlatFileView -------------------------------------------------
@@ -405,7 +409,7 @@ public class FlatFileChooserUI
 
 		protected final File[] files;
 		protected final JToggleButton[] buttons;
-		protected final ButtonGroup buttonGroup;
+		protected final ButtonGroup buttonGroup = new ButtonGroup();
 
 		@SuppressWarnings( "unchecked" )
 		public FlatShortcutsPanel( JFileChooser fc ) {
@@ -424,19 +428,22 @@ public class FlatFileChooserUI
 			File[] files = getChooserShortcutPanelFiles( fsv );
 			if( filesFunction != null )
 				files = filesFunction.apply( files );
-			this.files = files;
 
 			// create toolbar buttons
-			buttons = new JToggleButton[files.length];
-			buttonGroup = new ButtonGroup();
-			for( int i = 0; i < files.length; i++ ) {
-				// wrap drive path
-				if( fsv.isFileSystemRoot( files[i] ) )
-					files[i] = fsv.createFileObject( files[i].getAbsolutePath() );
+			ArrayList<File> filesList = new ArrayList<>();
+			ArrayList<JToggleButton> buttonsList = new ArrayList<>();
+			for( File file : files ) {
+				if( file == null )
+					continue;
+
+				// wrap drive path
+				if( fsv.isFileSystemRoot( file ) )
+					file = fsv.createFileObject( file.getAbsolutePath() );
 
-				File file = files[i];
 				String name = getDisplayName( fsv, file );
 				Icon icon = getIcon( fsv, file );
+				if( name == null )
+					continue;
 
 				// remove path from name
 				int lastSepIndex = name.lastIndexOf( File.separatorChar );
@@ -451,15 +458,21 @@ public class FlatFileChooserUI
 
 				// create button
 				JToggleButton button = createButton( name, icon );
+				File f = file;
 				button.addActionListener( e -> {
-					fc.setCurrentDirectory( file );
+					fc.setCurrentDirectory( f );
 				} );
 
 				add( button );
 				buttonGroup.add( button );
-				buttons[i] = button;
+
+				filesList.add( file );
+				buttonsList.add( button );
 			}
 
+			this.files = filesList.toArray( new File[filesList.size()] );
+			this.buttons = buttonsList.toArray( new JToggleButton[buttonsList.size()] );
+
 			directoryChanged( fc.getCurrentDirectory() );
 		}
 
@@ -524,6 +537,9 @@ public class FlatFileChooserUI
 					return icon;
 			}
 
+			if( doNotUseSystemIcons() )
+				return new FlatFileViewDirectoryIcon();
+
 			// Java 17+ supports getting larger system icons
 			try {
 				if( SystemInfo.isJava_17_orLater ) {
@@ -539,10 +555,12 @@ public class FlatFileChooserUI
 							return new ImageIcon( image );
 					}
 				}
-			} catch( IllegalAccessException ex ) {
-				// do not log because access may be denied via VM option '--illegal-access=deny'
 			} catch( Exception ex ) {
-				LoggingFacade.INSTANCE.logSevere( null, ex );
+				// do not log InaccessibleObjectException because access
+				// may be denied via VM option '--illegal-access=deny' (default in Java 16)
+				// (not catching InaccessibleObjectException here because it is new in Java 9, but FlatLaf also runs on Java 8)
+				if( !"java.lang.reflect.InaccessibleObjectException".equals( ex.getClass().getName() ) )
+					LoggingFacade.INSTANCE.logSevere( null, ex );
 			}
 
 			// get system icon in default size 16x16

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

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

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

@@ -24,6 +24,7 @@ import java.awt.Rectangle;
 import java.beans.PropertyChangeEvent;
 import java.util.Arrays;
 import java.util.HashSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import javax.swing.Icon;
@@ -179,7 +180,7 @@ public class FlatLabelUI
 			// BASE_SIZE rule is parsed in javax.swing.text.html.StyleSheet.addRule()
 			String style = "<style>BASE_SIZE " + c.getFont().getSize() + "</style>";
 
-			String lowerText = text.toLowerCase();
+			String lowerText = text.toLowerCase( Locale.ENGLISH );
 			int headIndex;
 			int styleIndex;
 
@@ -228,7 +229,7 @@ public class FlatLabelUI
 						int tagBegin = i + 1;
 						for( i += 2; i < textLength; i++ ) {
 							if( !Character.isLetterOrDigit( text.charAt( i ) ) ) {
-								String tag = text.substring( tagBegin, i ).toLowerCase();
+								String tag = text.substring( tagBegin, i ).toLowerCase( Locale.ENGLISH );
 								if( tagsUseFontSizeSet.contains( tag ) )
 									return true;
 

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

@@ -17,20 +17,34 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.EventQueue;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.Insets;
+import java.awt.Point;
+import java.awt.Rectangle;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
+import javax.swing.DefaultListCellRenderer;
 import javax.swing.JComponent;
+import javax.swing.JList;
+import javax.swing.ListCellRenderer;
+import javax.swing.ListModel;
+import javax.swing.ListSelectionModel;
 import javax.swing.UIManager;
+import javax.swing.event.ListSelectionListener;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.basic.BasicComboBoxRenderer;
 import javax.swing.plaf.basic.BasicListUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.Graphics2DProxy;
 import com.formdev.flatlaf.util.LoggingFacade;
+import com.formdev.flatlaf.util.UIScale;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JList}.
@@ -59,6 +73,8 @@ import com.formdev.flatlaf.util.LoggingFacade;
  *
  * @uiDefault List.selectionInactiveBackground		Color
  * @uiDefault List.selectionInactiveForeground		Color
+ * @uiDefault List.selectionInsets					Insets
+ * @uiDefault List.selectionArc						int
  *
  * <!-- FlatListCellBorder -->
  *
@@ -76,6 +92,8 @@ public class FlatListUI
 	@Styleable protected Color selectionForeground;
 	@Styleable protected Color selectionInactiveBackground;
 	@Styleable protected Color selectionInactiveForeground;
+	/** @since 3 */ @Styleable protected Insets selectionInsets;
+	/** @since 3 */ @Styleable protected int selectionArc;
 
 	// for FlatListCellBorder
 	/** @since 2 */ @Styleable protected Insets cellMargins;
@@ -110,6 +128,8 @@ public class FlatListUI
 		selectionForeground = UIManager.getColor( "List.selectionForeground" );
 		selectionInactiveBackground = UIManager.getColor( "List.selectionInactiveBackground" );
 		selectionInactiveForeground = UIManager.getColor( "List.selectionInactiveForeground" );
+		selectionInsets = UIManager.getInsets( "List.selectionInsets" );
+		selectionArc = UIManager.getInt( "List.selectionArc" );
 
 		toggleSelectionColors();
 	}
@@ -168,6 +188,29 @@ public class FlatListUI
 		};
 	}
 
+	@Override
+	protected ListSelectionListener createListSelectionListener() {
+		ListSelectionListener superListener = super.createListSelectionListener();
+		return e -> {
+			superListener.valueChanged( e );
+
+			// for united rounded selection, repaint parts of the rows/columns that adjoin to the changed rows/columns
+			if( useUnitedRoundedSelection( true, true ) &&
+				!list.isSelectionEmpty() &&
+				(list.getMaxSelectionIndex() - list.getMinSelectionIndex()) >= 1 )
+			{
+				int size = list.getModel().getSize();
+				int firstIndex = Math.min( Math.max( e.getFirstIndex(), 0 ), size - 1 );
+				int lastIndex = Math.min( Math.max( e.getLastIndex(), 0 ), size - 1 );
+				Rectangle r = getCellBounds( list, firstIndex, lastIndex );
+				if( r != null ) {
+					int arc = (int) Math.ceil( UIScale.scale( selectionArc / 2f ) );
+					list.repaint( r.x - arc, r.y - arc, r.width + (arc * 2), r.height + (arc * 2) );
+				}
+			}
+		};
+	}
+
 	/** @since 2 */
 	protected void installStyle() {
 		try {
@@ -247,4 +290,165 @@ public class FlatListUI
 				list.setSelectionForeground( selectionInactiveForeground );
 		}
 	}
+
+	@SuppressWarnings( "rawtypes" )
+	@Override
+	protected void paintCell( Graphics g, int row, Rectangle rowBounds, ListCellRenderer cellRenderer,
+		ListModel dataModel, ListSelectionModel selModel, int leadIndex )
+	{
+		boolean isSelected = selModel.isSelectedIndex( row );
+
+		// get renderer component
+		@SuppressWarnings( "unchecked" )
+		Component rendererComponent = cellRenderer.getListCellRendererComponent( list,
+			dataModel.getElementAt( row ), row, isSelected,
+			FlatUIUtils.isPermanentFocusOwner( list ) && (row == leadIndex) );
+
+		//
+		boolean isFileList = Boolean.TRUE.equals( list.getClientProperty( "List.isFileList" ) );
+		int cx, cw;
+		if( isFileList ) {
+			// see BasicListUI.paintCell()
+			cw = Math.min( rowBounds.width, rendererComponent.getPreferredSize().width + 4 );
+			cx = list.getComponentOrientation().isLeftToRight()
+				? rowBounds.x
+				: rowBounds.x + (rowBounds.width - cw);
+		} else {
+			cx = rowBounds.x;
+			cw = rowBounds.width;
+		}
+
+		// rounded selection or selection insets
+		if( isSelected &&
+			!isFileList && // rounded selection is not supported for file list
+			(rendererComponent instanceof DefaultListCellRenderer ||
+			 rendererComponent instanceof BasicComboBoxRenderer) &&
+			(selectionArc > 0 ||
+			 (selectionInsets != null &&
+			  (selectionInsets.top != 0 || selectionInsets.left != 0 || selectionInsets.bottom != 0 || selectionInsets.right != 0))) )
+		{
+			// Because selection painting is done in the cell renderer, it would be
+			// necessary to require a FlatLaf specific renderer to implement rounded selection.
+			// Using a LaF specific renderer was avoided because often a custom renderer is
+			// already used in applications. Then either the rounded selection is not used,
+			// or the application has to be changed to extend a FlatLaf renderer.
+			//
+			// To solve this, a graphics proxy is used that paints rounded selection
+			// if row is selected and the renderer wants to fill the background.
+			class RoundedSelectionGraphics extends Graphics2DProxy {
+				// used to avoid endless loop in case that paintCellSelection() invokes
+				// g.fillRect() with full bounds (selectionInsets is 0,0,0,0)
+				private boolean inPaintSelection;
+
+				RoundedSelectionGraphics( Graphics delegate ) {
+					super( (Graphics2D) delegate );
+				}
+
+				@Override
+				public Graphics create() {
+					return new RoundedSelectionGraphics( super.create() );
+				}
+
+				@Override
+				public Graphics create( int x, int y, int width, int height ) {
+					return new RoundedSelectionGraphics( super.create( x, y, width, height ) );
+				}
+
+				@Override
+				public void fillRect( int x, int y, int width, int height ) {
+					if( !inPaintSelection &&
+						x == 0 && y == 0 && width == rowBounds.width && height == rowBounds.height &&
+						this.getColor() == rendererComponent.getBackground() )
+					{
+						inPaintSelection = true;
+						paintCellSelection( this, row, x, y, width, height );
+						inPaintSelection = false;
+					} else
+						super.fillRect( x, y, width, height );
+				}
+			}
+			g = new RoundedSelectionGraphics( g );
+		}
+
+		// paint renderer
+		rendererPane.paintComponent( g, rendererComponent, list, cx, rowBounds.y, cw, rowBounds.height, true );
+	}
+
+	/** @since 3 */
+	protected void paintCellSelection( Graphics g, int row, int x, int y, int width, int height ) {
+		float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
+		arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
+
+		if( list.getLayoutOrientation() == JList.VERTICAL ) {
+			// layout orientation: VERTICAL
+			if( useUnitedRoundedSelection( true, false ) ) {
+				if( row > 0 && list.isSelectedIndex( row - 1 ) )
+					arcTopLeft = arcTopRight = 0;
+				if( row < list.getModel().getSize() - 1 && list.isSelectedIndex( row + 1 ) )
+					arcBottomLeft = arcBottomRight = 0;
+			}
+		} else {
+			// layout orientation: VERTICAL_WRAP or HORIZONTAL_WRAP
+			Rectangle r = null;
+			if( useUnitedRoundedSelection( true, false ) ) {
+				// vertical: check whether cells above or below are selected
+				r = getCellBounds( list, row, row );
+
+				int topIndex = locationToIndex( list, new Point( r.x, r.y - 1 ) );
+				int bottomIndex = locationToIndex( list, new Point( r.x, r.y + r.height ) );
+
+				if( topIndex >= 0 && topIndex != row && list.isSelectedIndex( topIndex ) )
+					arcTopLeft = arcTopRight = 0;
+				if( bottomIndex >= 0 && bottomIndex != row && list.isSelectedIndex( bottomIndex ) )
+					arcBottomLeft = arcBottomRight = 0;
+			}
+
+			if( useUnitedRoundedSelection( false, true ) ) {
+				// horizontal: check whether cells left or right are selected
+				if( r == null )
+					r = getCellBounds( list, row, row );
+
+				int leftIndex = locationToIndex( list, new Point( r.x - 1, r.y ) );
+				int rightIndex = locationToIndex( list, new Point( r.x + r.width, r.y ) );
+
+				// special handling for the case that last column contains less cells than the other columns
+				boolean ltr = list.getComponentOrientation().isLeftToRight();
+				if( !ltr && leftIndex >= 0 && leftIndex != row && leftIndex == locationToIndex( list, new Point( r.x - 1, r.y - 1 ) ) )
+					leftIndex = -1;
+				if( ltr && rightIndex >= 0 && rightIndex != row && rightIndex == locationToIndex( list, new Point( r.x + r.width, r.y - 1 ) ) )
+					rightIndex = -1;
+
+				if( leftIndex >= 0 && leftIndex != row && list.isSelectedIndex( leftIndex ) )
+					arcTopLeft = arcBottomLeft = 0;
+				if( rightIndex >= 0 && rightIndex != row && list.isSelectedIndex( rightIndex ) )
+					arcTopRight = arcBottomRight = 0;
+			}
+		}
+
+		FlatUIUtils.paintSelection( (Graphics2D) g, x, y, width, height,
+			UIScale.scale( selectionInsets ), arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight, 0 );
+	}
+
+	private boolean useUnitedRoundedSelection( boolean vertical, boolean horizontal ) {
+		return selectionArc > 0 &&
+			(selectionInsets == null ||
+			 (vertical && selectionInsets.top == 0 && selectionInsets.bottom == 0) ||
+			 (horizontal && selectionInsets.left == 0 && selectionInsets.right == 0));
+	}
+
+	/**
+	 * Paints a cell selection at the given coordinates.
+	 * The selection color must be set on the graphics context.
+	 * <p>
+	 * This method is intended for use in custom cell renderers.
+	 *
+	 * @since 3
+	 */
+	public static void paintCellSelection( JList<?> list, Graphics g, int row, int x, int y, int width, int height ) {
+		if( !(list.getUI() instanceof FlatListUI) )
+			return;
+
+		FlatListUI ui = (FlatListUI) list.getUI();
+		ui.paintCellSelection( g, row, x, y, width, height );
+	}
 }

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

@@ -75,6 +75,9 @@ public class FlatMenuBarUI
 	/** @since 2 */ @Styleable protected Insets itemMargins;
 
 	// used in FlatMenuUI
+	/** @since 3 */ @Styleable protected Insets selectionInsets;
+	/** @since 3 */ @Styleable protected Insets selectionEmbeddedInsets;
+	/** @since 3 */ @Styleable protected int selectionArc = -1;
 	/** @since 2 */ @Styleable protected Color hoverBackground;
 	/** @since 2.5 */ @Styleable protected Color selectionBackground;
 	/** @since 2.5 */ @Styleable protected Color selectionForeground;

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

@@ -63,6 +63,8 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @uiDefault MenuItem.acceleratorArrowGap							int
  * @uiDefault MenuItem.checkBackground								Color
  * @uiDefault MenuItem.checkMargins									Insets
+ * @uiDefault MenuItem.selectionInsets								Insets
+ * @uiDefault MenuItem.selectionArc									int
  * @uiDefault MenuItem.selectionType								String	null (default) or underline
  * @uiDefault MenuItem.underlineSelectionBackground					Color
  * @uiDefault MenuItem.underlineSelectionCheckBackground			Color
@@ -91,6 +93,9 @@ public class FlatMenuItemRenderer
 	@Styleable protected Color checkBackground = UIManager.getColor( "MenuItem.checkBackground" );
 	@Styleable protected Insets checkMargins = UIManager.getInsets( "MenuItem.checkMargins" );
 
+	/** @since 3 */ @Styleable protected Insets selectionInsets = UIManager.getInsets( "MenuItem.selectionInsets" );
+	/** @since 3 */ @Styleable protected int selectionArc = UIManager.getInt( "MenuItem.selectionArc" );
+
 	@Styleable protected Color underlineSelectionBackground = UIManager.getColor( "MenuItem.underlineSelectionBackground" );
 	@Styleable protected Color underlineSelectionCheckBackground = UIManager.getColor( "MenuItem.underlineSelectionCheckBackground" );
 	@Styleable protected Color underlineSelectionColor = UIManager.getColor( "MenuItem.underlineSelectionColor" );
@@ -337,10 +342,16 @@ public class FlatMenuItemRenderer
 		g.setColor( Color.orange ); g.drawRect( arrowRect.x, arrowRect.y, arrowRect.width - 1, arrowRect.height - 1 );
 debug*/
 
+		boolean armedOrSelected = isArmedOrSelected( menuItem );
 		boolean underlineSelection = isUnderlineSelection();
-		paintBackground( g, underlineSelection ? underlineSelectionBackground : selectionBackground );
-		if( underlineSelection && isArmedOrSelected( menuItem ) )
-			paintUnderlineSelection( g, underlineSelectionColor, underlineSelectionHeight );
+
+		paintBackground( g );
+		if( armedOrSelected ) {
+			if( underlineSelection )
+				paintUnderlineSelection( g, underlineSelectionBackground, underlineSelectionColor, underlineSelectionHeight );
+			else
+				paintSelection( g, selectionBackground, selectionInsets, selectionArc );
+		}
 		paintIcon( g, iconRect, getIconForPainting(), underlineSelection ? underlineSelectionCheckBackground : checkBackground, selectionBackground );
 		paintText( g, textRect, menuItem.getText(), selectionForeground, disabledForeground );
 		paintAccelerator( g, accelRect, getAcceleratorText(), acceleratorForeground, acceleratorSelectionForeground, disabledForeground );
@@ -348,21 +359,35 @@ debug*/
 			paintArrowIcon( g, arrowRect, arrowIcon );
 	}
 
-	protected void paintBackground( Graphics g, Color selectionBackground ) {
-		boolean armedOrSelected = isArmedOrSelected( menuItem );
-		if( menuItem.isOpaque() || armedOrSelected ) {
-			// paint background
-			g.setColor( armedOrSelected
-				? deriveBackground( selectionBackground )
-				: menuItem.getBackground() );
+	/** @since 3 */
+	protected void paintBackground( Graphics g ) {
+		if( menuItem.isOpaque() ) {
+			g.setColor( menuItem.getBackground() );
 			g.fillRect( 0, 0, menuItem.getWidth(), menuItem.getHeight() );
 		}
 	}
 
-	protected void paintUnderlineSelection( Graphics g, Color underlineSelectionColor, int underlineSelectionHeight ) {
+	/** @since 3 */
+	protected void paintSelection( Graphics g, Color selectionBackground, Insets selectionInsets, int selectionArc ) {
+		float arc = scale( selectionArc / 2f );
+
+		g.setColor( deriveBackground( selectionBackground ) );
+		FlatUIUtils.paintSelection( (Graphics2D) g, 0, 0, menuItem.getWidth(), menuItem.getHeight(),
+			scale( selectionInsets ), arc, arc, arc, arc, 0 );
+	}
+
+	/** @since 3 */
+	protected void paintUnderlineSelection( Graphics g, Color underlineSelectionBackground,
+		Color underlineSelectionColor, int underlineSelectionHeight )
+	{
 		int width = menuItem.getWidth();
 		int height = menuItem.getHeight();
 
+		// paint background
+		g.setColor( deriveBackground( underlineSelectionBackground ) );
+		g.fillRect( 0, 0, width, height );
+
+		// paint underline
 		int underlineHeight = scale( underlineSelectionHeight );
 		g.setColor( underlineSelectionColor );
 		if( isTopLevelMenu( menuItem ) ) {
@@ -431,10 +456,11 @@ debug*/
 			return;
 
 		// center because the real icon may be smaller than dimension in iconRect
+		int x = iconRect.x + centerOffset( iconRect.width, icon.getIconWidth() );
 		int y = iconRect.y + centerOffset( iconRect.height, icon.getIconHeight() );
 
 		// paint
-		icon.paintIcon( menuItem, g, iconRect.x, y );
+		icon.paintIcon( menuItem, g, x, y );
 	}
 
 	protected static void paintText( Graphics g, JMenuItem menuItem,
@@ -500,7 +526,11 @@ debug*/
 
 	private Font getTopLevelFont() {
 		Font font = menuItem.getFont();
-		return (font != menuFont) ? font : menuItem.getParent().getFont();
+		// menu item parent may be null if JMenu.isTopLevelMenu() is overridden
+		// and does not check parent (e.g. com.jidesoft.swing.JideMenu.isTopLevelMenu())
+		return (font != menuFont || menuItem.getParent() == null)
+			? font
+			: menuItem.getParent().getFont();
 	}
 
 	private Icon getIconForPainting() {

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

@@ -20,7 +20,9 @@ import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Font;
 import java.awt.Graphics;
+import java.awt.Insets;
 import java.awt.Rectangle;
+import java.awt.Window;
 import java.awt.event.MouseEvent;
 import java.beans.PropertyChangeListener;
 import java.lang.invoke.MethodHandles;
@@ -32,7 +34,9 @@ import javax.swing.JComponent;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
+import javax.swing.JRootPane;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.event.MouseInputListener;
 import javax.swing.plaf.ComponentUI;
@@ -75,9 +79,12 @@ import com.formdev.flatlaf.util.LoggingFacade;
  *
  * <!-- FlatMenuRenderer -->
  *
+ * @uiDefault MenuBar.selectionInsets								Insets
+ * @uiDefault MenuBar.selectionEmbeddedInsets						Insets
+ * @uiDefault MenuBar.selectionArc									int
  * @uiDefault MenuBar.hoverBackground								Color
- * @uiDefault MenuBar.selectionBackground							Color
- * @uiDefault MenuBar.selectionForeground							Color
+ * @uiDefault MenuBar.selectionBackground							Color	optional; defaults to Menu.selectionBackground
+ * @uiDefault MenuBar.selectionForeground							Color	optional; defaults to Menu.selectionForeground
  * @uiDefault MenuBar.underlineSelectionBackground					Color
  * @uiDefault MenuBar.underlineSelectionColor						Color
  * @uiDefault MenuBar.underlineSelectionHeight						int
@@ -225,12 +232,15 @@ public class FlatMenuUI
 	protected class FlatMenuRenderer
 		extends FlatMenuItemRenderer
 	{
+		/** @since 3 */ protected Insets menuBarSelectionInsets = UIManager.getInsets( "MenuBar.selectionInsets" );
+		/** @since 3 */ protected Insets menuBarSelectionEmbeddedInsets = UIManager.getInsets( "MenuBar.selectionEmbeddedInsets" );
+		/** @since 3 */ protected int menuBarSelectionArc = UIManager.getInt( "MenuBar.selectionArc" );
 		protected Color hoverBackground = UIManager.getColor( "MenuBar.hoverBackground" );
-		protected Color menuBarSelectionBackground = UIManager.getColor( "MenuBar.selectionBackground" );
-		protected Color menuBarSelectionForeground = UIManager.getColor( "MenuBar.selectionForeground" );
-		protected Color menuBarUnderlineSelectionBackground = FlatUIUtils.getUIColor( "MenuBar.underlineSelectionBackground", underlineSelectionBackground );
-		protected Color menuBarUnderlineSelectionColor = FlatUIUtils.getUIColor( "MenuBar.underlineSelectionColor", underlineSelectionColor );
-		protected int menuBarUnderlineSelectionHeight = FlatUIUtils.getUIInt( "MenuBar.underlineSelectionHeight", underlineSelectionHeight );
+		/** @since 2.5 */ protected Color menuBarSelectionBackground = UIManager.getColor( "MenuBar.selectionBackground" );
+		/** @since 2.5 */ protected Color menuBarSelectionForeground = UIManager.getColor( "MenuBar.selectionForeground" );
+		protected Color menuBarUnderlineSelectionBackground = UIManager.getColor( "MenuBar.underlineSelectionBackground" );
+		protected Color menuBarUnderlineSelectionColor = UIManager.getColor( "MenuBar.underlineSelectionColor" );
+		protected int menuBarUnderlineSelectionHeight = FlatUIUtils.getUIInt( "MenuBar.underlineSelectionHeight", -1 );
 
 		protected FlatMenuRenderer( JMenuItem menuItem, Icon checkIcon, Icon arrowIcon,
 			Font acceleratorFont, String acceleratorDelimiter )
@@ -238,46 +248,76 @@ public class FlatMenuUI
 			super( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 		}
 
+		/** @since 3 */
 		@Override
-		protected void paintBackground( Graphics g, Color selectionBackground ) {
-			if( ((JMenu)menuItem).isTopLevelMenu() ) {
-				if( isUnderlineSelection() )
-					selectionBackground = getStyleFromMenuBarUI( ui -> ui.underlineSelectionBackground, menuBarUnderlineSelectionBackground );
-				else {
-					selectionBackground = getStyleFromMenuBarUI( ui -> ui.selectionBackground,
-						menuBarSelectionBackground != null ? menuBarSelectionBackground : selectionBackground );
-				}
+		protected void paintBackground( Graphics g ) {
+			super.paintBackground( g );
 
-				ButtonModel model = menuItem.getModel();
-				if( model.isRollover() && !model.isArmed() && !model.isSelected() && model.isEnabled() ) {
-					g.setColor( deriveBackground( getStyleFromMenuBarUI( ui -> ui.hoverBackground, hoverBackground ) ) );
+			if( ((JMenu)menuItem).isTopLevelMenu() && isHover() ) {
+				// paint hover background
+				Color color = deriveBackground( getStyleFromMenuBarUI( ui -> ui.hoverBackground, hoverBackground ) );
+				if( isUnderlineSelection() ) {
+					g.setColor( color );
 					g.fillRect( 0, 0, menuItem.getWidth(), menuItem.getHeight() );
-					return;
-				}
+				} else
+					paintSelection( g, color, selectionInsets, selectionArc );
+			}
+		}
+
+		/** @since 3 */
+		@Override
+		protected void paintSelection( Graphics g, Color selectionBackground, Insets selectionInsets, int selectionArc ) {
+			if( ((JMenu)menuItem).isTopLevelMenu() ) {
+				if( !isHover() )
+					selectionBackground = getStyleFromMenuBarUI( ui -> ui.selectionBackground, menuBarSelectionBackground, selectionBackground );
+
+				JMenuBar menuBar = (JMenuBar) menuItem.getParent();
+				JRootPane rootPane = SwingUtilities.getRootPane( menuBar );
+				if( rootPane != null && rootPane.getParent() instanceof Window &&
+					rootPane.getJMenuBar() == menuBar &&
+					FlatRootPaneUI.isMenuBarEmbedded( rootPane ) )
+				{
+					selectionInsets = getStyleFromMenuBarUI( ui -> ui.selectionEmbeddedInsets, menuBarSelectionEmbeddedInsets );
+				} else
+					selectionInsets = getStyleFromMenuBarUI( ui -> ui.selectionInsets, menuBarSelectionInsets );
+
+				selectionArc = getStyleFromMenuBarUI( ui -> (ui.selectionArc != -1)
+					? ui.selectionArc : null, menuBarSelectionArc );
 			}
 
-			super.paintBackground( g, selectionBackground );
+			super.paintSelection( g, selectionBackground, selectionInsets, selectionArc );
+		}
+
+		/** @since 3 */
+		@Override
+		protected void paintUnderlineSelection( Graphics g, Color underlineSelectionBackground,
+			Color underlineSelectionColor, int underlineSelectionHeight )
+		{
+			if( ((JMenu)menuItem).isTopLevelMenu() ) {
+				underlineSelectionBackground = getStyleFromMenuBarUI( ui -> ui.underlineSelectionBackground, menuBarUnderlineSelectionBackground, underlineSelectionBackground );
+				underlineSelectionColor = getStyleFromMenuBarUI( ui -> ui.underlineSelectionColor, menuBarUnderlineSelectionColor, underlineSelectionColor );
+				underlineSelectionHeight = getStyleFromMenuBarUI( ui -> (ui.underlineSelectionHeight != -1) ? ui.underlineSelectionHeight : null,
+					 (menuBarUnderlineSelectionHeight != -1) ? menuBarUnderlineSelectionHeight : underlineSelectionHeight );
+			}
+
+			super.paintUnderlineSelection( g, underlineSelectionBackground, underlineSelectionColor, underlineSelectionHeight );
 		}
 
 		@Override
 		protected void paintText( Graphics g, Rectangle textRect, String text, Color selectionForeground, Color disabledForeground ) {
-			if( ((JMenu)menuItem).isTopLevelMenu() && !isUnderlineSelection() ) {
-				selectionForeground = getStyleFromMenuBarUI( ui -> ui.selectionForeground,
-					menuBarSelectionForeground != null ? menuBarSelectionForeground : selectionForeground );
-			}
+			if( ((JMenu)menuItem).isTopLevelMenu() && !isUnderlineSelection() )
+				selectionForeground = getStyleFromMenuBarUI( ui -> ui.selectionForeground, menuBarSelectionForeground, selectionForeground );
 
 			super.paintText( g, textRect, text, selectionForeground, disabledForeground );
 		}
 
-		@Override
-		protected void paintUnderlineSelection( Graphics g, Color underlineSelectionColor, int underlineSelectionHeight ) {
-			if( ((JMenu)menuItem).isTopLevelMenu() ) {
-				underlineSelectionColor = getStyleFromMenuBarUI( ui -> ui.underlineSelectionColor, menuBarUnderlineSelectionColor );
-				underlineSelectionHeight = getStyleFromMenuBarUI( ui -> (ui.underlineSelectionHeight != -1)
-					? ui.underlineSelectionHeight : null, menuBarUnderlineSelectionHeight );
-			}
+		private boolean isHover() {
+			ButtonModel model = menuItem.getModel();
+			return model.isRollover() && !model.isArmed() && !model.isSelected() && model.isEnabled();
+		}
 
-			super.paintUnderlineSelection( g, underlineSelectionColor, underlineSelectionHeight );
+		private <T> T getStyleFromMenuBarUI( Function<FlatMenuBarUI, T> f, T defaultValue, T defaultValue2 ) {
+			return getStyleFromMenuBarUI( f, (defaultValue != null) ? defaultValue : defaultValue2 );
 		}
 
 		private <T> T getStyleFromMenuBarUI( Function<FlatMenuBarUI, T> f, T defaultValue ) {

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

@@ -17,6 +17,8 @@
 package com.formdev.flatlaf.ui;
 
 import java.io.File;
+import java.net.URL;
+import java.security.CodeSource;
 import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.NativeLibrary;
@@ -31,6 +33,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 class FlatNativeLibrary
 {
+	private static boolean initialized;
 	private static NativeLibrary nativeLibrary;
 
 	/**
@@ -43,32 +46,48 @@ class FlatNativeLibrary
 	}
 
 	private static void initialize() {
-		if( nativeLibrary != null )
+		if( initialized )
+			return;
+		initialized = true;
+
+		if( !FlatSystemProperties.getBoolean( FlatSystemProperties.USE_NATIVE_LIBRARY, true ) )
 			return;
 
-		String libraryName;
-		if( SystemInfo.isWindows_10_orLater && (SystemInfo.isX86 || SystemInfo.isX86_64) ) {
-			// Windows: requires Windows 10 (x86 or x86_64)
+		String classifier;
+		String ext;
+		if( SystemInfo.isWindows_10_orLater && (SystemInfo.isX86 || SystemInfo.isX86_64 || SystemInfo.isAARCH64) ) {
+			// Windows: requires Windows 10/11 (x86, x86_64 or aarch64)
 
-			libraryName = "flatlaf-windows-x86";
-			if( SystemInfo.isX86_64 )
-				libraryName += "_64";
+			if( SystemInfo.isAARCH64 )
+				classifier = "windows-arm64";
+			else if( SystemInfo.isX86_64 )
+				classifier = "windows-x86_64";
+			else
+				classifier = "windows-x86";
+
+			ext = "dll";
+
+			// Do not load jawt.dll (part of JRE) here explicitly because
+			// the FlatLaf native library flatlaf.dll may be loaded very early on Windows
+			// (e.g. from class com.formdev.flatlaf.util.SystemInfo) and before AWT is
+			// initialized (and awt.dll is loaded). Loading jawt.dll also loads awt.dll.
+			// In Java 8, loading jawt.dll before AWT is initialized may load
+			// a wrong version of awt.dll if a newer Java version (e.g. 19)
+			// is in PATH environment variable. Then Java 19 awt.dll and Java 8 awt.dll
+			// are loaded at same time and calling JAWT_GetAWT() crashes the application.
+			//
+			// To avoid this, flatlaf.dll is not linked to jawt.dll,
+			// which avoids loading jawt.dll when flatlaf.dll is loaded.
+			// Instead flatlaf.dll dynamically loads jawt.dll when first used,
+			// which is guaranteed after AWT initialization.
 
-			// load jawt native library
-			if( !SystemInfo.isJava_9_orLater ) {
-				// In Java 8, load jawt.dll (part of JRE) explicitly because it
-				// is not found when running application with <jdk>/bin/java.exe.
-				// When using <jdk>/jre/bin/java.exe, it is found.
-				// jawt.dll is located in <jdk>/jre/bin/.
-				// Java 9 and later do not have this problem.
-				loadJAWT();
-			}
 		} else if( SystemInfo.isLinux && SystemInfo.isX86_64 ) {
 			// Linux: requires x86_64
 
-			libraryName = "flatlaf-linux-x86_64";
+			classifier = "linux-x86_64";
+			ext = "so";
 
-			// Load jawt.so (part of JRE) explicitly because it is not found
+			// Load libjawt.so (part of JRE) explicitly because it is not found
 			// in all Java versions/distributions.
 			// E.g. not found in Java 13 and later from openjdk.java.net.
 			// There seems to be also differences between distributions.
@@ -78,22 +97,98 @@ class FlatNativeLibrary
 			return; // no native library available for current OS or CPU architecture
 
 		// load native library
-		nativeLibrary = createNativeLibrary( libraryName );
+		nativeLibrary = createNativeLibrary( classifier, ext );
 	}
 
-	private static NativeLibrary createNativeLibrary( String libraryName ) {
+	private static NativeLibrary createNativeLibrary( String classifier, String ext ) {
+		String libraryName = "flatlaf-" + classifier;
+
+		// load from "java.library.path" or from path specified in system property "flatlaf.nativeLibraryPath"
 		String libraryPath = System.getProperty( FlatSystemProperties.NATIVE_LIBRARY_PATH );
 		if( libraryPath != null ) {
-			File libraryFile = new File( libraryPath, System.mapLibraryName( libraryName ) );
-			if( libraryFile.exists() )
-				return new NativeLibrary( libraryFile, true );
-			else
+			if( "system".equals( libraryPath ) ) {
+				NativeLibrary library = new NativeLibrary( libraryName, true );
+				if( library.isLoaded() )
+					return library;
+
+				LoggingFacade.INSTANCE.logSevere( "Did not find library " + libraryName + " in java.library.path, using extracted library instead", null );
+			} else {
+				File libraryFile = new File( libraryPath, System.mapLibraryName( libraryName ) );
+				if( libraryFile.exists() )
+					return new NativeLibrary( libraryFile, true );
+
 				LoggingFacade.INSTANCE.logSevere( "Did not find external library " + libraryFile + ", using extracted library instead", null );
+			}
 		}
 
+		// load from beside the FlatLaf jar
+		// e.g. for flatlaf-3.1.jar, load flatlaf-3.1-windows-x86_64.dll (from same directory)
+		File libraryFile = findLibraryBesideJar( classifier, ext );
+		if( libraryFile != null )
+			return new NativeLibrary( libraryFile, true );
+
+		// load from FlatLaf jar (extract native library to temp folder)
 		return new NativeLibrary( "com/formdev/flatlaf/natives/" + libraryName, null, true );
 	}
 
+	/**
+	 * Search for a native library beside the jar that contains this class
+	 * (usually the FlatLaf jar).
+	 * The native library must be in the same directory (or in "../bin" if jar is in "lib")
+	 * as the jar and have the same basename as the jar.
+	 * If FlatLaf jar is repackaged into fat/uber application jar, "-flatlaf" is appended to jar basename.
+	 * The classifier and the extension are appended to the jar basename.
+	 *
+	 * E.g.
+	 *     flatlaf-3.1.jar
+	 *     flatlaf-3.1-windows-x86_64.dll
+	 *     flatlaf-3.1-linux-x86_64.so
+	 */
+	private static File findLibraryBesideJar( String classifier, String ext ) {
+		try {
+			// get location of FlatLaf jar
+			CodeSource codeSource = FlatNativeLibrary.class.getProtectionDomain().getCodeSource();
+			URL jarUrl = (codeSource != null) ? codeSource.getLocation() : null;
+			if( jarUrl == null )
+				return null;
+
+			// if url is not a file, then we're running in a special environment (e.g. WebStart)
+			if( !"file".equals( jarUrl.getProtocol() ) )
+				return null;
+
+			File jarFile = new File( jarUrl.toURI() );
+
+			// if jarFile is a directory, then we're in a development environment
+			if( !jarFile.isFile() )
+				return null;
+
+			// build library file
+			String jarName = jarFile.getName();
+			String jarBasename = jarName.substring( 0, jarName.lastIndexOf( '.' ) );
+			File parent = jarFile.getParentFile();
+			String libraryName = jarBasename
+				+ (jarBasename.contains( "flatlaf" ) ? "" : "-flatlaf")
+				+ '-' + classifier + '.' + ext;
+
+			// check whether native library exists in same directory as jar
+			File libraryFile = new File( parent, libraryName );
+			if( libraryFile.isFile() )
+				return libraryFile;
+
+			// if jar is in "lib" directory, then also check whether library exists
+			// in "../bin" directory
+			if( parent.getName().equalsIgnoreCase( "lib" ) ) {
+				libraryFile = new File( parent.getParentFile(), "bin/" + libraryName );
+				if( libraryFile.isFile() )
+					return libraryFile;
+			}
+		} catch( Exception ex ) {
+			LoggingFacade.INSTANCE.logSevere( ex.getMessage(), ex );
+		}
+
+		return null;
+	}
+
 	private static void loadJAWT() {
 		try {
 			System.loadLibrary( "jawt" );
@@ -101,9 +196,9 @@ class FlatNativeLibrary
 			// log error only if native library jawt.dll not already loaded
 			String message = ex.getMessage();
 			if( message == null || !message.contains( "already loaded in another classloader" ) )
-				LoggingFacade.INSTANCE.logSevere( null, ex );
+				LoggingFacade.INSTANCE.logSevere( message, ex );
 		} catch( Exception ex ) {
-			LoggingFacade.INSTANCE.logSevere( null, ex );
+			LoggingFacade.INSTANCE.logSevere( ex.getMessage(), ex );
 		}
 	}
 }

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

@@ -23,6 +23,7 @@ import java.awt.event.MouseEvent;
 import java.awt.geom.AffineTransform;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Native methods for Linux.
@@ -35,7 +36,7 @@ import javax.swing.JFrame;
 class FlatNativeLinuxLibrary
 {
 	static boolean isLoaded() {
-		return FlatNativeLibrary.isLoaded();
+		return SystemInfo.isLinux && FlatNativeLibrary.isLoaded();
 	}
 
 	// direction for _NET_WM_MOVERESIZE message

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

@@ -0,0 +1,107 @@
+/*
+ * Copyright 2022 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Window;
+import com.formdev.flatlaf.util.SystemInfo;
+
+/**
+ * Native methods for Windows.
+ * <p>
+ * <b>Note</b>: This is private API. Do not use!
+ *
+ * @author Karl Tauber
+ * @since 3.1
+ */
+public class FlatNativeWindowsLibrary
+{
+	private static long osBuildNumber = Long.MIN_VALUE;
+
+	public static boolean isLoaded() {
+		return SystemInfo.isWindows && FlatNativeLibrary.isLoaded();
+	}
+
+	/**
+	 * Gets the Windows operating system build number.
+	 * <p>
+	 * Invokes Win32 API method {@code GetVersionEx()} and returns {@code OSVERSIONINFO.dwBuildNumber}.
+	 * See https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversionexa
+	 */
+	public static long getOSBuildNumber() {
+		if( osBuildNumber == Long.MIN_VALUE )
+			osBuildNumber = getOSBuildNumberImpl();
+		return osBuildNumber;
+	}
+
+	/**
+	 * Invokes Win32 API method {@code GetVersionEx()} and returns {@code OSVERSIONINFO.dwBuildNumber}.
+	 * See https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversionexa
+	 */
+	private native static long getOSBuildNumberImpl();
+
+	/**
+	 * Gets the Windows window handle (HWND) for the given Swing window.
+	 * <p>
+	 * Note that the underlying Windows window must be already created,
+	 * otherwise this method returns zero. Use following to ensure this:
+	 * <pre>{@code
+	 * if( !window.isDisplayable() )
+	 *     window.addNotify();
+	 * }</pre>
+	 * or invoke this method after packing the window. E.g.
+	 * <pre>{@code
+	 * window.pack();
+	 * long hwnd = getHWND( window );
+	 * }</pre>
+	 */
+	public native static long getHWND( Window window );
+
+	/**
+	 * DWM_WINDOW_CORNER_PREFERENCE
+	 * see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
+	 */
+	public static final int
+		DWMWCP_DEFAULT = 0,
+		DWMWCP_DONOTROUND = 1,
+		DWMWCP_ROUND = 2,
+		DWMWCP_ROUNDSMALL = 3;
+
+	/**
+	 * Sets the rounded corner preference for the window.
+	 * Allowed values are {@link #DWMWCP_DEFAULT}, {@link #DWMWCP_DONOTROUND},
+	 * {@link #DWMWCP_ROUND} and {@link #DWMWCP_ROUNDSMALL}.
+	 * <p>
+	 * Invokes Win32 API method {@code DwmSetWindowAttribute(DWMWA_WINDOW_CORNER_PREFERENCE)}.
+	 * See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
+	 * <p>
+	 * Supported since Windows 11 Build 22000.
+	 */
+	public native static boolean setWindowCornerPreference( long hwnd, int cornerPreference );
+
+	/**
+	 * Sets the color of the window border.
+	 * The red/green/blue values must be in range {@code 0 - 255}.
+	 * If red is {@code -1}, then the system default border color is used (useful to reset the border color).
+	 * If red is {@code -2}, then no border is painted.
+	 * <p>
+	 * Invokes Win32 API method {@code DwmSetWindowAttribute(DWMWA_BORDER_COLOR)}.
+	 * See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
+	 * <p>
+	 * Supported since Windows 11 Build 22000.
+	 */
+	public native static boolean setWindowBorderColor( long hwnd, int red, int green, int blue );
+}

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

@@ -66,7 +66,6 @@ import com.formdev.flatlaf.util.UIScale;
  * <!-- FlatTextFieldUI -->
  *
  * @uiDefault Component.minimumWidth				int
- * @uiDefault Component.isIntelliJTheme				boolean
  * @uiDefault PasswordField.placeholderForeground	Color
  * @uiDefault PasswordField.focusedBackground		Color	optional
  * @uiDefault PasswordField.iconTextGap				int		optional, default is 4

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

@@ -36,6 +36,7 @@ import java.awt.Window;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
 import java.awt.event.MouseEvent;
+import java.awt.event.WindowFocusListener;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
@@ -43,6 +44,7 @@ import java.lang.reflect.Method;
 import javax.swing.JComponent;
 import javax.swing.JLayeredPane;
 import javax.swing.JPanel;
+import javax.swing.JPopupMenu;
 import javax.swing.JToolTip;
 import javax.swing.JWindow;
 import javax.swing.Popup;
@@ -52,6 +54,9 @@ import javax.swing.SwingUtilities;
 import javax.swing.ToolTipManager;
 import javax.swing.UIManager;
 import javax.swing.border.Border;
+import javax.swing.border.EmptyBorder;
+import javax.swing.border.LineBorder;
+import javax.swing.plaf.basic.BasicComboPopup;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
@@ -79,6 +84,8 @@ public class FlatPopupFactory
 			y = pt.y;
 		}
 
+		fixLinuxWaylandJava21focusIssue( owner );
+
 		boolean forceHeavyWeight = isOptionEnabled( owner, contents, FlatClientProperties.POPUP_FORCE_HEAVY_WEIGHT, "Popup.forceHeavyWeight" );
 
 		if( !isOptionEnabled( owner, contents, FlatClientProperties.POPUP_DROP_SHADOW_PAINTED, "Popup.dropShadowPainted" ) || SystemInfo.isProjector || SystemInfo.isWebswing )
@@ -88,6 +95,21 @@ public class FlatPopupFactory
 		if( SystemInfo.isMacOS || SystemInfo.isLinux )
 			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), contents );
 
+		// Windows 11 with FlatLaf native library can use rounded corners and shows drop shadow for heavy weight popups
+		int borderCornerRadius;
+		if( isWindows11BorderSupported() &&
+			(borderCornerRadius = getBorderCornerRadius( owner, contents )) > 0 )
+		{
+			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), contents );
+			if( popup.popupWindow != null )
+				setupWindows11Border( popup.popupWindow, contents, borderCornerRadius );
+			return popup;
+		}
+
+		// check whether popup overlaps a heavy weight component
+		if( !forceHeavyWeight && overlapsHeavyWeightComponent( owner, contents, x, y ) )
+			forceHeavyWeight = true;
+
 		// create drop shadow popup
 		return new DropShadowPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), owner, contents );
 	}
@@ -166,19 +188,39 @@ public class FlatPopupFactory
 	}
 
 	private boolean isOptionEnabled( Component owner, Component contents, String clientKey, String uiKey ) {
-		if( owner instanceof JComponent ) {
-			Boolean b = FlatClientProperties.clientPropertyBooleanStrict( (JComponent) owner, clientKey, null );
-			if( b != null )
-				return b;
+		Object value = getOption( owner, contents, clientKey, uiKey );
+		return (value instanceof Boolean) ? (Boolean) value : false;
+	}
+
+	private int getBorderCornerRadius( Component owner, Component contents ) {
+		String uiKey =
+			(contents instanceof BasicComboPopup) ? "ComboBox.borderCornerRadius" :
+			(contents instanceof JPopupMenu) ? "PopupMenu.borderCornerRadius" :
+			(contents instanceof JToolTip) ? "ToolTip.borderCornerRadius" :
+			"Popup.borderCornerRadius";
+
+		Object value = getOption( owner, contents, FlatClientProperties.POPUP_BORDER_CORNER_RADIUS, uiKey );
+		return (value instanceof Integer) ? (Integer) value : 0;
+	}
+
+	/**
+	 * Get option from:
+	 * <ol>
+	 * <li>client property {@code clientKey} of {@code owner}
+	 * <li>client property {@code clientKey} of {@code contents}
+	 * <li>UI property {@code uiKey}
+	 * </ol>
+	 */
+	private Object getOption( Component owner, Component contents, String clientKey, String uiKey ) {
+		for( Component c : new Component[] { owner, contents } ) {
+			if( c instanceof JComponent ) {
+				Object value = ((JComponent)c).getClientProperty( clientKey );
+				if( value != null )
+					return value;
+			}
 		}
 
-		if( contents instanceof JComponent ) {
-			Boolean b = FlatClientProperties.clientPropertyBooleanStrict( (JComponent) contents, clientKey, null );
-			if( b != null )
-				return b;
-		}
-
-		return UIManager.getBoolean( uiKey );
+		return UIManager.get( uiKey );
 	}
 
 	/**
@@ -300,9 +342,122 @@ public class FlatPopupFactory
 			((JComponent)owner).getToolTipLocation( me ) != null;
 	}
 
+	private static boolean isWindows11BorderSupported() {
+		return SystemInfo.isWindows_11_orLater && FlatNativeWindowsLibrary.isLoaded();
+	}
+
+	private static void setupWindows11Border( Window popupWindow, Component contents, int borderCornerRadius ) {
+		// make sure that the Windows 11 window is created
+		if( !popupWindow.isDisplayable() )
+			popupWindow.addNotify();
+
+		// get window handle
+		long hwnd = FlatNativeWindowsLibrary.getHWND( popupWindow );
+
+		// set corner preference
+		int cornerPreference = (borderCornerRadius <= 4)
+			? FlatNativeWindowsLibrary.DWMWCP_ROUNDSMALL  // 4px
+			: FlatNativeWindowsLibrary.DWMWCP_ROUND;      // 8px
+		FlatNativeWindowsLibrary.setWindowCornerPreference( hwnd, cornerPreference );
+
+		// set border color
+		int red = -1; // use system default color
+		int green = 0;
+		int blue = 0;
+		if( contents instanceof JComponent ) {
+			Border border = ((JComponent)contents).getBorder();
+			border = FlatUIUtils.unwrapNonUIResourceBorder( border );
+
+			// get color from border of contents (e.g. JPopupMenu or JToolTip)
+			Color borderColor = null;
+			if( border instanceof FlatLineBorder )
+				borderColor = ((FlatLineBorder)border).getLineColor();
+			else if( border instanceof LineBorder )
+				borderColor = ((LineBorder)border).getLineColor();
+			else if( border instanceof EmptyBorder )
+				red = -2; // do not paint border
+
+			if( borderColor != null ) {
+				red = borderColor.getRed();
+				green = borderColor.getGreen();
+				blue = borderColor.getBlue();
+			}
+		}
+		FlatNativeWindowsLibrary.setWindowBorderColor( hwnd, red, green, blue );
+	}
+
+	private static void resetWindows11Border( Window popupWindow ) {
+		// get window handle
+		long hwnd = FlatNativeWindowsLibrary.getHWND( popupWindow );
+		if( hwnd == 0 )
+			return;
+
+		// reset corner preference
+		FlatNativeWindowsLibrary.setWindowCornerPreference( hwnd, FlatNativeWindowsLibrary.DWMWCP_DONOTROUND );
+	}
+
+	private static boolean overlapsHeavyWeightComponent( Component owner, Component contents, int x, int y ) {
+		Window window = SwingUtilities.getWindowAncestor( owner );
+		if( window == null )
+			return false;
+
+		Rectangle r = new Rectangle( new Point( x, y ), contents.getPreferredSize() );
+		return overlapsHeavyWeightComponent( window, r );
+	}
+
+	private static boolean overlapsHeavyWeightComponent( Component parent, Rectangle r ) {
+		if( !parent.isVisible() || !r.intersects( parent.getBounds() ) )
+			return false;
+
+		if( !parent.isLightweight() && !(parent instanceof Window) )
+			return true;
+
+		if( parent instanceof Container ) {
+			Rectangle r2 = new Rectangle( r.x - parent.getX(), r.y - parent.getY(), r.width, r.height );
+			for( Component c : ((Container)parent).getComponents() ) {
+				if( overlapsHeavyWeightComponent( c, r2 ) )
+					return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * On Linux with Wayland, since Java 21, Swing adds a window focus listener to popup owner/invoker window,
+	 * which hides the popup as soon as the owner/invoker window looses focus.
+	 * This works fine for light-weight popups.
+	 * It also works for heavy-weight popups if the do not request focus.
+	 * Because FlatLaf always uses heavy-weight popups, all popups that request focus
+	 * are broken since Java 21.
+	 *
+	 * This method removes the problematic window focus listener.
+	 *
+	 * https://bugs.openjdk.org/browse/JDK-8280993
+	 * https://github.com/openjdk/jdk/pull/13830
+	 */
+	private static void fixLinuxWaylandJava21focusIssue( Component owner ) {
+		// only necessary on Linux when running in Java 21+
+		if( !SystemInfo.isLinux || SystemInfo.javaVersion < SystemInfo.toVersion( 21, 0, 0, 0 ) )
+			return;
+
+		// get window
+		Window window = SwingUtilities.getWindowAncestor( owner );
+		if( window == null )
+			return;
+
+		// remove window focus listener, which was added from class sun.awt.UNIXToolkit since Java 21
+		for( WindowFocusListener l : window.getWindowFocusListeners() ) {
+			if( "sun.awt.UNIXToolkit$1".equals( l.getClass().getName() ) ) {
+				window.removeWindowFocusListener( l );
+				break;
+			}
+		}
+	}
+
 	//---- class NonFlashingPopup ---------------------------------------------
 
-	private class NonFlashingPopup
+	private static class NonFlashingPopup
 		extends Popup
 	{
 		private Popup delegate;
@@ -431,6 +586,14 @@ public class FlatPopupFactory
 					oldDropShadowWindowBackground = dropShadowWindow.getBackground();
 					dropShadowWindow.setBackground( new Color( 0, true ) );
 				}
+
+				// Windows 11: reset corner preference on reused heavy weight popups
+				if( isWindows11BorderSupported() ) {
+					resetWindows11Border( popupWindow );
+					if( dropShadowWindow != null )
+						resetWindows11Border( dropShadowWindow );
+				}
+
 			} else {
 				mediumWeightPanel = (Panel) SwingUtilities.getAncestorOfClass( Panel.class, contents );
 				if( mediumWeightPanel != null ) {

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

@@ -67,6 +67,7 @@ import javax.swing.plaf.basic.BasicComboPopup;
 import javax.swing.plaf.basic.BasicMenuItemUI;
 import javax.swing.plaf.basic.BasicPopupMenuUI;
 import javax.swing.plaf.basic.DefaultMenuLayout;
+import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.LoggingFacade;
@@ -192,27 +193,38 @@ public class FlatPopupMenuUI
 
 	@Override
 	public Popup getPopup( JPopupMenu popup, int x, int y ) {
+		Dimension popupSize = popup.getPreferredSize();
+		Rectangle screenBounds = getScreenBoundsAt( x, y );
+
+		// make sure that popup does not overlap any task/side bar
+		if( x + popupSize.width > screenBounds.x + screenBounds.width )
+			x = screenBounds.x + screenBounds.width - popupSize.width;
+		if( y + popupSize.height > screenBounds.y + screenBounds.height )
+			y = screenBounds.y + screenBounds.height - popupSize.height;
+		if( x < screenBounds.x )
+			x = screenBounds.x;
+		if( y < screenBounds.y )
+			y = screenBounds.y;
+
 		// do not add scroller to combobox popups or to popups that already have a scroll pane
 		if( popup instanceof BasicComboPopup ||
 			(popup.getComponentCount() > 0 && popup.getComponent( 0 ) instanceof JScrollPane) )
 		  return super.getPopup( popup, x, y );
 
 		// do not add scroller if popup fits into screen
-		Dimension prefSize = popup.getPreferredSize();
-		int screenHeight = getScreenHeightAt( x, y );
-		if( prefSize.height <= screenHeight )
+		if( popupSize.height <= screenBounds.height )
 			return super.getPopup( popup, x, y );
 
 		// create scroller
 		FlatPopupScroller scroller = new FlatPopupScroller( popup );
-		scroller.setPreferredSize( new Dimension( prefSize.width, screenHeight ) );
+		scroller.setPreferredSize( new Dimension( popupSize.width, screenBounds.height ) );
 
 		// create popup
 		PopupFactory popupFactory = PopupFactory.getSharedInstance();
 		return popupFactory.getPopup( popup.getInvoker(), scroller, x, y );
 	}
 
-	private int getScreenHeightAt( int x, int y ) {
+	private Rectangle getScreenBoundsAt( int x, int y ) {
 		// find GraphicsConfiguration at popup location (similar to JPopupMenu.getCurrentGraphicsConfiguration())
 		GraphicsConfiguration gc = null;
 		for( GraphicsDevice device : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices() ) {
@@ -233,7 +245,7 @@ public class FlatPopupMenuUI
 		Toolkit toolkit = Toolkit.getDefaultToolkit();
 		Rectangle screenBounds = (gc != null) ? gc.getBounds() : new Rectangle( toolkit.getScreenSize() );
 		Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
-		return screenBounds.height - screenInsets.top - screenInsets.bottom;
+		return FlatUIUtils.subtractInsets( screenBounds, screenInsets );
 	}
 
 	//---- class FlatPopupMenuLayout ------------------------------------------
@@ -297,6 +309,9 @@ public class FlatPopupMenuUI
 			popup.addMenuKeyListener( this );
 
 			updateArrowButtons();
+
+			putClientProperty( FlatClientProperties.POPUP_BORDER_CORNER_RADIUS,
+				UIManager.getInt( "PopupMenu.borderCornerRadius" ) );
 		}
 
 		void scroll( int unitsToScroll ) {

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

@@ -35,6 +35,7 @@ import javax.swing.CellRendererPane;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
@@ -208,6 +209,9 @@ public class FlatRadioButtonUI
 			return ((FlatCheckBoxIcon)icon).applyStyleProperty( key, value );
 		}
 
+		if( "iconTextGap".equals( key ) && value instanceof Integer )
+			value = UIScale.scale( (Integer) value );
+
 		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, b, key, value );
 	}
 
@@ -275,20 +279,27 @@ public class FlatRadioButtonUI
 		int focusWidth = getIconFocusWidth( c );
 		if( focusWidth > 0 ) {
 			boolean ltr = c.getComponentOrientation().isLeftToRight();
+			int halign = ((AbstractButton)c).getHorizontalAlignment();
+			if( halign == SwingConstants.LEADING )
+				halign = ltr ? SwingConstants.LEFT : SwingConstants.RIGHT;
+			else if( halign == SwingConstants.TRAILING )
+				halign = ltr ? SwingConstants.RIGHT : SwingConstants.LEFT;
+
 			Insets insets = c.getInsets( tempInsets );
-			int leftOrRightInset = ltr ? insets.left : insets.right;
-			if( focusWidth > leftOrRightInset ) {
+			if( (focusWidth > insets.left || focusWidth > insets.right) &&
+				(halign == SwingConstants.LEFT || halign == SwingConstants.RIGHT) )
+			{
 				// The left (or right) inset is smaller than the focus width, which may be
 				// the case if insets were explicitly reduced (e.g. with an EmptyBorder).
 				// In this case the width has been increased in getPreferredSize() and
 				// here it is necessary to fix icon and text painting location.
-				int offset = focusWidth - leftOrRightInset;
-				if( !ltr )
-					offset = -offset;
+				int offset = (halign == SwingConstants.LEFT)
+					? Math.max( focusWidth - insets.left, 0 )
+					: -Math.max( focusWidth - insets.right, 0 );
 
 				// move the graphics origin to the left (or right)
 				g.translate( offset, 0 );
-				super.paint( g, c );
+				super.paint( FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c ), c );
 				g.translate( -offset, 0 );
 				return;
 			}
@@ -325,6 +336,11 @@ public class FlatRadioButtonUI
 			: 0;
 	}
 
+	@Override
+	public int getBaseline( JComponent c, int width, int height ) {
+		return FlatButtonUI.getBaselineImpl( c, width, height );
+	}
+
 	//---- class FlatRadioButtonListener --------------------------------------
 
 	/** @since 2 */

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

@@ -23,6 +23,7 @@ import java.awt.Dimension;
 import java.awt.Frame;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.IllegalComponentStateException;
 import java.awt.Insets;
 import java.awt.LayoutManager;
 import java.awt.LayoutManager2;
@@ -349,11 +350,28 @@ public class FlatRootPaneUI
 					titlePane.updateIcon();
 				break;
 
+			case FlatClientProperties.TITLE_BAR_SHOW_TITLE:
+			case FlatClientProperties.TITLE_BAR_SHOW_ICONIFFY:
+			case FlatClientProperties.TITLE_BAR_SHOW_MAXIMIZE:
+			case FlatClientProperties.TITLE_BAR_SHOW_CLOSE:
+				if( titlePane != null )
+					titlePane.updateVisibility();
+				break;
+
 			case FlatClientProperties.TITLE_BAR_BACKGROUND:
 			case FlatClientProperties.TITLE_BAR_FOREGROUND:
 				if( titlePane != null )
 					titlePane.titleBarColorsChanged();
 				break;
+
+			case FlatClientProperties.GLASS_PANE_FULL_HEIGHT:
+				rootPane.revalidate();
+				break;
+
+			case FlatClientProperties.WINDOW_STYLE:
+				if( rootPane.isDisplayable() )
+					throw new IllegalComponentStateException( "The client property 'Window.style' must be set before the window becomes displayable." );
+				break;
 		}
 	}
 
@@ -434,11 +452,11 @@ public class FlatRootPaneUI
 			int width = rootPane.getWidth() - insets.left - insets.right;
 			int height = rootPane.getHeight() - insets.top - insets.bottom;
 
+			// layered pane
 			if( rootPane.getLayeredPane() != null )
 				rootPane.getLayeredPane().setBounds( x, y, width, height );
-			if( rootPane.getGlassPane() != null )
-				rootPane.getGlassPane().setBounds( x, y, width, height );
 
+			// title pane
 			int nextY = 0;
 			if( titlePane != null ) {
 				int prefHeight = !isFullScreen ? titlePane.getPreferredSize().height : 0;
@@ -446,6 +464,15 @@ public class FlatRootPaneUI
 				nextY += prefHeight;
 			}
 
+			// glass pane
+			if( rootPane.getGlassPane() != null ) {
+				boolean fullHeight = FlatClientProperties.clientPropertyBoolean(
+					rootPane, FlatClientProperties.GLASS_PANE_FULL_HEIGHT, false );
+				int offset = fullHeight ? 0 : nextY;
+				rootPane.getGlassPane().setBounds( x, y + offset, width, height - offset );
+			}
+
+			// menu bar
 			JMenuBar menuBar = rootPane.getJMenuBar();
 			if( menuBar != null && menuBar.isVisible() ) {
 				boolean embedded = !isFullScreen && titlePane != null && titlePane.isMenuBarEmbedded();
@@ -459,10 +486,12 @@ public class FlatRootPaneUI
 				}
 			}
 
+			// content pane
 			Container contentPane = rootPane.getContentPane();
 			if( contentPane != null )
 				contentPane.setBounds( 0, nextY, width, Math.max( height - nextY, 0 ) );
 
+			// title pane
 			if( titlePane != null )
 				titlePane.menuBarLayouted();
 		}
@@ -528,7 +557,7 @@ public class FlatRootPaneUI
 
 		protected boolean isWindowMaximized( Component c ) {
 			Container parent = c.getParent();
-			return parent instanceof Frame && (((Frame)parent).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0;
+			return parent instanceof Frame && (((Frame)parent).getExtendedState() & Frame.MAXIMIZED_BOTH) == Frame.MAXIMIZED_BOTH;
 		}
 	}
 

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

@@ -17,7 +17,10 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Component;
+import java.awt.Graphics;
+import javax.swing.JSpinner;
 import javax.swing.UIManager;
+import javax.swing.plaf.SpinnerUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 
 /**
@@ -35,6 +38,19 @@ public class FlatRoundBorder
 	// only used via styling (not in UI defaults, but has likewise client properties)
 	/** @since 2 */ @Styleable protected Boolean roundRect;
 
+	@Override
+	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+		// make mac style spinner border smaller (border does not surround arrow buttons)
+		if( isMacStyleSpinner( c ) ) {
+			int macStyleButtonsWidth = ((FlatSpinnerUI)((JSpinner)c).getUI()).getMacStyleButtonsWidth();
+			width -= macStyleButtonsWidth;
+			if( !c.getComponentOrientation().isLeftToRight() )
+				x += macStyleButtonsWidth;
+		}
+
+		super.paintBorder( c, g, x, y, width, height );
+	}
+
 	@Override
 	protected int getArc( Component c ) {
 		if( isCellEditor( c ) )
@@ -43,6 +59,17 @@ public class FlatRoundBorder
 		Boolean roundRect = FlatUIUtils.isRoundRect( c );
 		if( roundRect == null )
 			roundRect = this.roundRect;
-		return roundRect != null ? (roundRect ? Short.MAX_VALUE : 0) : arc;
+		return roundRect != null
+			? (roundRect ? Short.MAX_VALUE : 0)
+			: (isMacStyleSpinner( c ) ? 0 : arc);
+	}
+
+	private boolean isMacStyleSpinner( Component c ) {
+		if( c instanceof JSpinner ) {
+			SpinnerUI ui = ((JSpinner)c).getUI();
+			if( ui instanceof FlatSpinnerUI )
+				return ((FlatSpinnerUI)ui).isMacStyle();
+		}
+		return false;
 	}
 }

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

@@ -352,6 +352,9 @@ public class FlatScrollBarUI
 
 	@Override
 	protected void paintTrack( Graphics g, JComponent c, Rectangle trackBounds ) {
+		if( trackBounds.isEmpty() || !scrollbar.isEnabled() )
+			return;
+
 		g.setColor( getTrackColor( c, hoverTrack, isPressed && hoverTrack && !hoverThumb ) );
 		paintTrackOrThumb( g, c, trackBounds, trackInsets, trackArc );
 	}
@@ -452,18 +455,31 @@ public class FlatScrollBarUI
 
 		@Override
 		public void mousePressed( MouseEvent e ) {
-			isPressed = true;
-			repaint();
+			if( SwingUtilities.isLeftMouseButton( e ) || isAbsolutePositioning( e ) ) {
+				isPressed = true;
+				repaint();
+
+				// update hover because BasicScrollBarUI.TrackListener.mousePressed()
+				// moves the track on middle-click (if absolute positioning is enabled)
+				if( isAbsolutePositioning( e ) )
+					update( e.getX(), e.getY() );
+			}
 		}
 
 		@Override
 		public void mouseReleased( MouseEvent e ) {
-			isPressed = false;
-			repaint();
+			if( SwingUtilities.isLeftMouseButton( e ) || isAbsolutePositioning( e ) ) {
+				isPressed = false;
+				repaint();
+			}
 
 			update( e.getX(), e.getY() );
 		}
 
+		private boolean isAbsolutePositioning( MouseEvent e ) {
+			return getSupportsAbsolutePositioning() && SwingUtilities.isMiddleMouseButton( e );
+		}
+
 		private void update( int x, int y ) {
 			boolean inTrack = getTrackBounds().contains( x, y );
 			boolean inThumb = getThumbBounds().contains( x, y );

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

@@ -360,8 +360,8 @@ public class FlatScrollPaneUI
 	protected void updateViewport( PropertyChangeEvent e ) {
 		super.updateViewport( e );
 
-		JViewport oldViewport = (JViewport) (e.getOldValue());
-		JViewport newViewport = (JViewport) (e.getNewValue());
+		JViewport oldViewport = (JViewport) e.getOldValue();
+		JViewport newViewport = (JViewport) e.getNewValue();
 
 		removeViewportListeners( oldViewport );
 		addViewportListeners( newViewport );

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

@@ -531,7 +531,7 @@ debug*/
 	public static Shape createDirectionalThumbShape( float x, float y, float w, float h, float arc ) {
 		float wh = w / 2;
 
-		Path2D path = new Path2D.Float();
+		Path2D path = new Path2D.Float( Path2D.WIND_NON_ZERO, 9 );
 		path.moveTo( x + wh, y + h );
 		path.lineTo( x, y + (h - wh) );
 		path.lineTo( x, y + arc );

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

@@ -65,9 +65,8 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * <!-- FlatSpinnerUI -->
  *
  * @uiDefault Component.minimumWidth			int
- * @uiDefault Spinner.buttonStyle				String	button (default) or none
+ * @uiDefault Spinner.buttonStyle				String	button (default), mac or none
  * @uiDefault Component.arrowType				String	chevron (default) or triangle
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault Spinner.disabledBackground		Color
  * @uiDefault Spinner.disabledForeground		Color
  * @uiDefault Spinner.focusedBackground			Color	optional
@@ -92,7 +91,6 @@ public class FlatSpinnerUI
 	@Styleable protected int minimumWidth;
 	@Styleable protected String buttonStyle;
 	@Styleable protected String arrowType;
-	protected boolean isIntelliJTheme;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color disabledForeground;
 	@Styleable protected Color focusedBackground;
@@ -129,7 +127,6 @@ public class FlatSpinnerUI
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
 		buttonStyle = UIManager.getString( "Spinner.buttonStyle" );
 		arrowType = UIManager.getString( "Component.arrowType" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		disabledBackground = UIManager.getColor( "Spinner.disabledBackground" );
 		disabledForeground = UIManager.getColor( "Spinner.disabledForeground" );
 		focusedBackground = UIManager.getColor( "Spinner.focusedBackground" );
@@ -316,7 +313,7 @@ public class FlatSpinnerUI
 
 			return background;
 		} else
-			return isIntelliJTheme ? FlatUIUtils.getParentBackground( spinner ) : disabledBackground;
+			return disabledBackground;
 	}
 
 	protected Color getForeground( boolean enabled ) {
@@ -340,7 +337,25 @@ public class FlatSpinnerUI
 
 	private Component createArrowButton( int direction, String name ) {
 		FlatArrowButton button = new FlatArrowButton( direction, arrowType, buttonArrowColor,
-			buttonDisabledArrowColor, buttonHoverArrowColor, null, buttonPressedArrowColor, null );
+			buttonDisabledArrowColor, buttonHoverArrowColor, null, buttonPressedArrowColor, null )
+		{
+			@Override
+			public int getArrowWidth() {
+				return isMacStyle() ? 7 : super.getArrowWidth();
+			}
+			@Override
+			public float getArrowThickness() {
+				return isMacStyle() ? 1.5f : super.getArrowThickness();
+			}
+			@Override
+			public float getYOffset() {
+				return isMacStyle() ? 0 : super.getYOffset();
+			}
+			@Override
+			public boolean isRoundBorderAutoXOffset() {
+				return isMacStyle() ? false : super.isRoundBorderAutoXOffset();
+			}
+		};
 		button.setName( name );
 		button.setYOffset( (direction == SwingConstants.NORTH) ? 1.25f : -1.25f );
 		if( direction == SwingConstants.NORTH )
@@ -374,10 +389,13 @@ public class FlatSpinnerUI
 		int width = c.getWidth();
 		int height = c.getHeight();
 		boolean enabled = spinner.isEnabled();
+		boolean ltr = spinner.getComponentOrientation().isLeftToRight();
+		boolean isMacStyle = isMacStyle();
+		int macStyleButtonsWidth = isMacStyle ? getMacStyleButtonsWidth() : 0;
 
 		// paint background
 		g2.setColor( getBackground( enabled ) );
-		FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
+		FlatUIUtils.paintComponentBackground( g2, ltr ? 0 : macStyleButtonsWidth, 0, width - macStyleButtonsWidth, height, focusWidth, arc );
 
 		// paint button background and separator
 		boolean paintButton = !"none".equals( buttonStyle );
@@ -386,27 +404,49 @@ public class FlatSpinnerUI
 			Component button = (handler.nextButton != null) ? handler.nextButton : handler.previousButton;
 			int arrowX = button.getX();
 			int arrowWidth = button.getWidth();
-			boolean isLeftToRight = spinner.getComponentOrientation().isLeftToRight();
-
-			// paint arrow buttons background
-			if( enabled && buttonBackground != null ) {
-				g2.setColor( buttonBackground );
-				Shape oldClip = g2.getClip();
-				if( isLeftToRight )
-					g2.clipRect( arrowX, 0, width - arrowX, height );
-				else
-					g2.clipRect( 0, 0, arrowX + arrowWidth, height );
-				FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
-				g2.setClip( oldClip );
-			}
-
-			// paint vertical line between value and arrow buttons
 			Color separatorColor = enabled ? buttonSeparatorColor : buttonDisabledSeparatorColor;
-			if( separatorColor != null && buttonSeparatorWidth > 0 ) {
-				g2.setColor( separatorColor );
+
+			if( isMacStyle ) {
+				Insets insets = spinner.getInsets();
+				int lineWidth = Math.round( FlatUIUtils.getBorderLineWidth( spinner ) );
+				int bx = arrowX;
+				int by = insets.top - lineWidth;
+				int bw = arrowWidth;
+				int bh = height - insets.top - insets.bottom + (lineWidth * 2);
 				float lw = scale( buttonSeparatorWidth );
-				float lx = isLeftToRight ? arrowX : arrowX + arrowWidth - lw;
-				g2.fill( new Rectangle2D.Float( lx, focusWidth, lw, height - 1 - (focusWidth * 2) ) );
+
+				// buttons border
+				FlatUIUtils.paintOutlinedComponent( g2, bx, by, bw, bh,
+					0, 0, 0, lw, scale( 12 ),
+					null, separatorColor, buttonBackground );
+
+				// separator between buttons
+				if( separatorColor != null ) {
+					int thickness = scale( 1 );
+					g2.setColor( separatorColor );
+					g2.fill( new Rectangle2D.Float( bx + lw, by + ((bh - thickness) / 2f),
+						bw - (lw * 2), thickness ) );
+				}
+			} else {
+				// paint arrow buttons background
+				if( enabled && buttonBackground != null ) {
+					g2.setColor( buttonBackground );
+					Shape oldClip = g2.getClip();
+					if( ltr )
+						g2.clipRect( arrowX, 0, width - arrowX, height );
+					else
+						g2.clipRect( 0, 0, arrowX + arrowWidth, height );
+					FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
+					g2.setClip( oldClip );
+				}
+
+				// paint vertical line between value and arrow buttons
+				if( separatorColor != null && buttonSeparatorWidth > 0 ) {
+					g2.setColor( separatorColor );
+					float lw = scale( buttonSeparatorWidth );
+					float lx = ltr ? arrowX : arrowX + arrowWidth - lw;
+					g2.fill( new Rectangle2D.Float( lx, focusWidth, lw, height - 1 - (focusWidth * 2) ) );
+				}
 			}
 		}
 
@@ -415,6 +455,19 @@ public class FlatSpinnerUI
 		FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
 	}
 
+	boolean isMacStyle() {
+		return "mac".equals( buttonStyle );
+	}
+
+	int getMacStyleButtonsWidth() {
+		return (handler.nextButton != null || handler.previousButton != null)
+			? scale( MAC_STEPPER_GAP ) + scale( MAC_STEPPER_WIDTH )
+			: 0;
+	}
+
+	private static final int MAC_STEPPER_WIDTH = 15;
+	private static final int MAC_STEPPER_GAP = 3;
+
 	//---- class Handler ------------------------------------------------------
 
 	private class Handler
@@ -471,6 +524,7 @@ public class FlatSpinnerUI
 			Insets insets = parent.getInsets();
 			Rectangle r = FlatUIUtils.subtractInsets( new Rectangle( size ), insets );
 
+			// editor gets all space if there are no buttons
 			if( nextButton == null && previousButton == null ) {
 				if( editor != null )
 					editor.setBounds( r );
@@ -483,22 +537,39 @@ public class FlatSpinnerUI
 			// limit buttons width to height of a raw spinner (without insets)
 			FontMetrics fm = spinner.getFontMetrics( spinner.getFont() );
 			int maxButtonWidth = fm.getHeight() + scale( padding.top ) + scale( padding.bottom );
+			int minButtonWidth = (maxButtonWidth * 3) / 4;
 
-			// make button area square (if spinner has preferred height)
-			int buttonsWidth = Math.min( parent.getPreferredSize().height - insets.top - insets.bottom, maxButtonWidth );
+			// make button area square (except if width is limited)
+			boolean isMacStyle = isMacStyle();
+			int buttonsGap = isMacStyle ? scale( MAC_STEPPER_GAP ) : 0;
+			int prefButtonWidth = isMacStyle ? scale( MAC_STEPPER_WIDTH ) : buttonsRect.height;
+			int buttonsWidth = Math.min( Math.max( prefButtonWidth, minButtonWidth ), maxButtonWidth );
+
+			// update editor and buttons bounds
 			buttonsRect.width = buttonsWidth;
+			editorRect.width -= buttonsWidth + buttonsGap;
+			boolean ltr = parent.getComponentOrientation().isLeftToRight();
+			if( ltr )
+				buttonsRect.x += editorRect.width + buttonsGap;
+			else
+				editorRect.x += buttonsWidth + buttonsGap;
 
-			if( parent.getComponentOrientation().isLeftToRight() ) {
-				editorRect.width -= buttonsWidth;
-				buttonsRect.x += editorRect.width;
-			} else {
-				editorRect.x += buttonsWidth;
-				editorRect.width -= buttonsWidth;
+			// in mac button style increase buttons height and move to the right
+			// for exact alignment with border
+			if( isMacStyle ) {
+				int lineWidth = Math.round( FlatUIUtils.getBorderLineWidth( spinner ) );
+				if( lineWidth > 0 ) {
+					buttonsRect.x += ltr ? lineWidth : -lineWidth;
+					buttonsRect.y -= lineWidth;
+					buttonsRect.height += lineWidth * 2;
+				}
 			}
 
+			// set editor bounds
 			if( editor != null )
 				editor.setBounds( editorRect );
 
+			// set buttons bounds
 			int nextHeight = (buttonsRect.height / 2) + (buttonsRect.height % 2); // round up
 			if( nextButton != null )
 				nextButton.setBounds( buttonsRect.x, buttonsRect.y, buttonsRect.width, nextHeight );

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

@@ -87,7 +87,6 @@ public class FlatSplitPaneUI
 	@Styleable protected Color oneTouchHoverArrowColor;
 	@Styleable protected Color oneTouchPressedArrowColor;
 
-	private PropertyChangeListener propertyChangeListener;
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
@@ -126,19 +125,9 @@ public class FlatSplitPaneUI
 	}
 
 	@Override
-	protected void installListeners() {
-		super.installListeners();
-
-		propertyChangeListener = FlatStylingSupport.createPropertyChangeListener( splitPane, this::installStyle, null );
-		splitPane.addPropertyChangeListener( propertyChangeListener );
-	}
-
-	@Override
-	protected void uninstallListeners() {
-		super.uninstallListeners();
-
-		splitPane.removePropertyChangeListener( propertyChangeListener );
-		propertyChangeListener = null;
+	protected PropertyChangeListener createPropertyChangeListener() {
+		return FlatStylingSupport.createPropertyChangeListener( splitPane, this::installStyle,
+			super.createPropertyChangeListener() );
 	}
 
 	@Override

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

@@ -100,15 +100,15 @@ public class FlatStylingSupport
 
 	/** @since 2 */
 	public interface StyleableUI {
-		Map<String, Class<?>> getStyleableInfos( JComponent c );
-		/** @since 2.5 */ Object getStyleableValue( JComponent c, String key );
+		Map<String, Class<?>> getStyleableInfos( JComponent c ) throws IllegalArgumentException;
+		/** @since 2.5 */ Object getStyleableValue( JComponent c, String key ) throws IllegalArgumentException;
 	}
 
 	/** @since 2 */
 	public interface StyleableBorder {
 		Object applyStyleProperty( String key, Object value );
-		Map<String, Class<?>> getStyleableInfos();
-		/** @since 2.5 */ Object getStyleableValue( String key );
+		Map<String, Class<?>> getStyleableInfos() throws IllegalArgumentException;
+		/** @since 2.5 */ Object getStyleableValue( String key ) throws IllegalArgumentException;
 	}
 
 	/** @since 2.5 */
@@ -135,7 +135,9 @@ public class FlatStylingSupport
 		return getStyle( c ) != null || getStyleClass( c ) != null;
 	}
 
-	public static Object getResolvedStyle( JComponent c, String type ) {
+	public static Object getResolvedStyle( JComponent c, String type )
+		throws IllegalArgumentException
+	{
 		Object style = getStyle( c );
 		Object styleClass = getStyleClass( c );
 		Object styleForClasses = getStyleForClasses( styleClass, type );
@@ -175,7 +177,9 @@ public class FlatStylingSupport
 	 * @param type the type of the component
 	 * @return the styles
 	 */
-	public static Object getStyleForClasses( Object styleClass, String type ) {
+	public static Object getStyleForClasses( Object styleClass, String type )
+		throws IllegalArgumentException
+	{
 		if( styleClass == null )
 			return null;
 
@@ -198,7 +202,9 @@ public class FlatStylingSupport
 			return null;
 	}
 
-	private static Object getStyleForClass( String styleClass, String type ) {
+	private static Object getStyleForClass( String styleClass, String type )
+		throws IllegalArgumentException
+	{
 		return joinStyles(
 			UIManager.get( "[style]." + styleClass ),
 			UIManager.get( "[style]" + type + '.' + styleClass ) );
@@ -218,7 +224,9 @@ public class FlatStylingSupport
 	 * @return new joined style
 	 */
 	@SuppressWarnings( "unchecked" )
-	public static Object joinStyles( Object style1, Object style2 ) {
+	public static Object joinStyles( Object style1, Object style2 )
+		throws IllegalArgumentException
+	{
 		if( style1 == null )
 			return style2;
 		if( style2 == null )
@@ -278,6 +286,7 @@ public class FlatStylingSupport
 	 * @throws IllegalArgumentException on syntax errors
 	 * @throws ClassCastException if value type does not fit to expected type
 	 */
+	@SuppressWarnings( "ReturnValueIgnored" ) // Error Prone
 	public static Map<String, Object> parseAndApply( Map<String, Object> oldStyleValues,
 		Object style, BiFunction<String, Object, Object> applyProperty )
 			throws UnknownStyleException, IllegalArgumentException
@@ -379,7 +388,9 @@ public class FlatStylingSupport
 		return map;
 	}
 
-	private static Object parseValue( String key, String value ) {
+	private static Object parseValue( String key, String value )
+		throws IllegalArgumentException
+	{
 		// simple reference
 		if( value.startsWith( "$" ) )
 			return UIManager.get( value.substring( 1 ) );
@@ -474,7 +485,9 @@ public class FlatStylingSupport
 		}
 	}
 
-	private static Object applyToField( Field f, Object obj, Object value, boolean useMethodHandles ) {
+	private static Object applyToField( Field f, Object obj, Object value, boolean useMethodHandles )
+		throws IllegalArgumentException
+	{
 		checkValidField( f );
 
 		if( useMethodHandles && obj instanceof StyleableLookupProvider ) {
@@ -504,7 +517,9 @@ public class FlatStylingSupport
 		}
 	}
 
-	private static Object getFieldValue( Field f, Object obj, boolean useMethodHandles ) {
+	private static Object getFieldValue( Field f, Object obj, boolean useMethodHandles )
+		throws IllegalArgumentException
+	{
 		checkValidField( f );
 
 		if( useMethodHandles && obj instanceof StyleableLookupProvider ) {
@@ -529,7 +544,9 @@ public class FlatStylingSupport
 		return new IllegalArgumentException( "failed to access field '" + f.getDeclaringClass().getName() + "." + f.getName() + "'", ex );
 	}
 
-	private static void checkValidField( Field f ) {
+	private static void checkValidField( Field f )
+		throws IllegalArgumentException
+	{
 		if( !isValidField( f ) )
 			throw new IllegalArgumentException( "field '" + f.getDeclaringClass().getName() + "." + f.getName() + "' is final or static" );
 	}
@@ -539,7 +556,9 @@ public class FlatStylingSupport
 		return (modifiers & (Modifier.FINAL|Modifier.STATIC)) == 0 && !f.isSynthetic();
 	}
 
-	private static Field getStyleableField( StyleableField styleableField ) {
+	private static Field getStyleableField( StyleableField styleableField )
+		throws IllegalArgumentException
+	{
 		String fieldName = styleableField.fieldName();
 		if( fieldName.isEmpty() )
 			fieldName = styleableField.key();
@@ -647,6 +666,7 @@ public class FlatStylingSupport
 
 	static Object applyToAnnotatedObjectOrBorder( Object obj, String key, Object value,
 		JComponent c, AtomicBoolean borderShared )
+			throws IllegalArgumentException
 	{
 		try {
 			return applyToAnnotatedObject( obj, key, value );
@@ -695,7 +715,9 @@ public class FlatStylingSupport
 		};
 	}
 
-	static Border cloneBorder( Border border ) {
+	static Border cloneBorder( Border border )
+		throws IllegalArgumentException
+	{
 		Class<? extends Border> borderClass = border.getClass();
 		try {
 			return borderClass.getDeclaredConstructor().newInstance();
@@ -704,7 +726,9 @@ public class FlatStylingSupport
 		}
 	}
 
-	static Icon cloneIcon( Icon icon ) {
+	static Icon cloneIcon( Icon icon )
+		throws IllegalArgumentException
+	{
 		Class<? extends Icon> iconClass = icon.getClass();
 		try {
 			return iconClass.getDeclaredConstructor().newInstance();
@@ -717,11 +741,15 @@ public class FlatStylingSupport
 	 * Returns a map of all fields annotated with {@link Styleable}.
 	 * The key is the name of the field and the value the type of the field.
 	 */
-	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj ) {
+	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj )
+		throws IllegalArgumentException
+	{
 		return getAnnotatedStyleableInfos( obj, null );
 	}
 
-	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj, Border border ) {
+	public static Map<String, Class<?>> getAnnotatedStyleableInfos( Object obj, Border border )
+		throws IllegalArgumentException
+	{
 		Map<String, Class<?>> infos = new StyleableInfosMap<>();
 		collectAnnotatedStyleableInfos( obj, infos );
 		collectStyleableInfos( border, infos );
@@ -732,7 +760,9 @@ public class FlatStylingSupport
 	 * Search for all fields annotated with {@link Styleable} and add them to the given map.
 	 * The key is the name of the field and the value the type of the field.
 	 */
-	public static void collectAnnotatedStyleableInfos( Object obj, Map<String, Class<?>> infos ) {
+	public static void collectAnnotatedStyleableInfos( Object obj, Map<String, Class<?>> infos )
+		throws IllegalArgumentException
+	{
 		HashSet<String> processedFields = new HashSet<>();
 		Class<?> cls = obj.getClass();
 
@@ -810,7 +840,9 @@ public class FlatStylingSupport
 			infos.put( keyPrefix.concat( e.getKey() ), e.getValue() );
 	}
 
-	public static Object getAnnotatedStyleableValue( Object obj, String key ) {
+	public static Object getAnnotatedStyleableValue( Object obj, String key )
+		throws IllegalArgumentException
+	{
 		String fieldName = keyToFieldName( key );
 		Class<?> cls = obj.getClass();
 
@@ -877,7 +909,9 @@ public class FlatStylingSupport
 		extends LinkedHashMap<K,V>
 	{
 		@Override
-		public V put( K key, V value ) {
+		public V put( K key, V value )
+			throws IllegalArgumentException
+		{
 			V oldValue = super.put( key, value );
 			if( oldValue != null )
 				throw new IllegalArgumentException( "duplicate key '" + key + "'" );

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

@@ -49,6 +49,7 @@ import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.awt.event.MouseMotionListener;
 import java.awt.event.MouseWheelEvent;
+import java.awt.geom.Area;
 import java.awt.geom.Path2D;
 import java.awt.geom.Rectangle2D;
 import java.beans.PropertyChangeEvent;
@@ -128,12 +129,14 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * @uiDefault TabbedPane.disabledForeground				Color
  * @uiDefault TabbedPane.selectedBackground				Color	optional
- * @uiDefault TabbedPane.selectedForeground				Color
+ * @uiDefault TabbedPane.selectedForeground				Color	optional
  * @uiDefault TabbedPane.underlineColor					Color
  * @uiDefault TabbedPane.inactiveUnderlineColor			Color
  * @uiDefault TabbedPane.disabledUnderlineColor			Color
- * @uiDefault TabbedPane.hoverColor						Color
- * @uiDefault TabbedPane.focusColor						Color
+ * @uiDefault TabbedPane.hoverColor						Color	optional
+ * @uiDefault TabbedPane.hoverForeground				Color	optional
+ * @uiDefault TabbedPane.focusColor						Color	optional
+ * @uiDefault TabbedPane.focusForeground				Color	optional
  * @uiDefault TabbedPane.tabSeparatorColor				Color	optional; defaults to TabbedPane.contentAreaColor
  * @uiDefault TabbedPane.contentAreaColor				Color
  * @uiDefault TabbedPane.minimumTabWidth				int		optional
@@ -141,6 +144,11 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TabbedPane.tabHeight						int
  * @uiDefault TabbedPane.tabSelectionHeight				int
  * @uiDefault TabbedPane.cardTabSelectionHeight			int
+ * @uiDefault TabbedPane.tabArc							int
+ * @uiDefault TabbedPane.tabSelectionArc				int
+ * @uiDefault TabbedPane.cardTabArc						int
+ * @uiDefault TabbedPane.selectedInsets					Insets
+ * @uiDefault TabbedPane.tabSelectionInsets				Insets
  * @uiDefault TabbedPane.contentSeparatorHeight			int
  * @uiDefault TabbedPane.showTabSeparators				boolean
  * @uiDefault TabbedPane.tabSeparatorsFullHeight		boolean
@@ -205,7 +213,9 @@ public class FlatTabbedPaneUI
 	/** @since 2.2 */ @Styleable protected Color inactiveUnderlineColor;
 	@Styleable protected Color disabledUnderlineColor;
 	@Styleable protected Color hoverColor;
+	/** @since 3.1 */ @Styleable protected Color hoverForeground;
 	@Styleable protected Color focusColor;
+	/** @since 3.1 */ @Styleable protected Color focusForeground;
 	@Styleable protected Color tabSeparatorColor;
 	@Styleable protected Color contentAreaColor;
 
@@ -215,6 +225,11 @@ public class FlatTabbedPaneUI
 	@Styleable protected int tabHeight;
 	@Styleable protected int tabSelectionHeight;
 	/** @since 2 */ @Styleable protected int cardTabSelectionHeight;
+	/** @since 3.2 */ @Styleable protected int tabArc;
+	/** @since 3.2 */ @Styleable protected int tabSelectionArc;
+	/** @since 3.2 */ @Styleable protected int cardTabArc;
+	/** @since 3.2 */ @Styleable protected Insets selectedInsets;
+	/** @since 3.2 */ @Styleable protected Insets tabSelectionInsets;
 	@Styleable protected int contentSeparatorHeight;
 	@Styleable protected boolean showTabSeparators;
 	@Styleable protected boolean tabSeparatorsFullHeight;
@@ -328,7 +343,9 @@ public class FlatTabbedPaneUI
 		inactiveUnderlineColor = FlatUIUtils.getUIColor( "TabbedPane.inactiveUnderlineColor", underlineColor );
 		disabledUnderlineColor = UIManager.getColor( "TabbedPane.disabledUnderlineColor" );
 		hoverColor = UIManager.getColor( "TabbedPane.hoverColor" );
+		hoverForeground = UIManager.getColor( "TabbedPane.hoverForeground" );
 		focusColor = UIManager.getColor( "TabbedPane.focusColor" );
+		focusForeground = UIManager.getColor( "TabbedPane.focusForeground" );
 		tabSeparatorColor = UIManager.getColor( "TabbedPane.tabSeparatorColor" );
 		contentAreaColor = UIManager.getColor( "TabbedPane.contentAreaColor" );
 
@@ -338,6 +355,11 @@ public class FlatTabbedPaneUI
 		tabHeight = UIManager.getInt( "TabbedPane.tabHeight" );
 		tabSelectionHeight = UIManager.getInt( "TabbedPane.tabSelectionHeight" );
 		cardTabSelectionHeight = UIManager.getInt( "TabbedPane.cardTabSelectionHeight" );
+		tabArc = UIManager.getInt( "TabbedPane.tabArc" );
+		tabSelectionArc = UIManager.getInt( "TabbedPane.tabSelectionArc" );
+		cardTabArc = UIManager.getInt( "TabbedPane.cardTabArc" );
+		selectedInsets = UIManager.getInsets( "TabbedPane.selectedInsets" );
+		tabSelectionInsets = UIManager.getInsets( "TabbedPane.tabSelectionInsets" );
 		contentSeparatorHeight = UIManager.getInt( "TabbedPane.contentSeparatorHeight" );
 		showTabSeparators = UIManager.getBoolean( "TabbedPane.showTabSeparators" );
 		tabSeparatorsFullHeight = UIManager.getBoolean( "TabbedPane.tabSeparatorsFullHeight" );
@@ -397,7 +419,9 @@ public class FlatTabbedPaneUI
 		inactiveUnderlineColor = null;
 		disabledUnderlineColor = null;
 		hoverColor = null;
+		hoverForeground = null;
 		focusColor = null;
+		focusForeground = null;
 		tabSeparatorColor = null;
 		contentAreaColor = null;
 		closeIcon = null;
@@ -1141,42 +1165,101 @@ public class FlatTabbedPaneUI
 			}
 
 			// plain text
-			Color color;
-			if( tabPane.isEnabled() && tabPane.isEnabledAt( tabIndex ) ) {
-				color = tabPane.getForegroundAt( tabIndex );
-				if( isSelected && selectedForeground != null && color == tabPane.getForeground() )
-					color = selectedForeground;
-			} else
-				color = disabledForeground;
-
 			int mnemIndex = FlatLaf.isShowMnemonics() ? tabPane.getDisplayedMnemonicIndexAt( tabIndex ) : -1;
-
-			g.setColor( color );
+			g.setColor( getTabForeground( tabPlacement, tabIndex, isSelected ) );
 			FlatUIUtils.drawStringUnderlineCharAt( tabPane, g, title, mnemIndex,
 				textRect.x, textRect.y + metrics.getAscent() );
 		} );
 	}
 
+	/** @since 3.1 */
+	protected Color getTabForeground( int tabPlacement, int tabIndex, boolean isSelected ) {
+		// tabbed pane or tab is disabled
+		if( !tabPane.isEnabled() || !tabPane.isEnabledAt( tabIndex ) )
+			return disabledForeground;
+
+		// hover
+		if( hoverForeground != null && getRolloverTab() == tabIndex )
+			return hoverForeground;
+
+		// tab foreground (if set)
+		Color foreground = tabPane.getForegroundAt( tabIndex );
+		if( foreground != tabPane.getForeground() )
+			return foreground;
+
+		// focused and selected
+		if( focusForeground != null && isSelected && FlatUIUtils.isPermanentFocusOwner( tabPane ) )
+			return focusForeground;
+		if( selectedForeground != null && isSelected )
+			return selectedForeground;
+
+		return foreground;
+	}
+
 	@Override
 	protected void paintTabBackground( Graphics g, int tabPlacement, int tabIndex,
 		int x, int y, int w, int h, boolean isSelected )
 	{
+		boolean isCard = (getTabType() == TAB_TYPE_CARD);
+
+		// fill whole tab background if tab is rounded or has insets
+		if( (!isCard && tabArc > 0) ||
+			(isCard && cardTabArc > 0) ||
+			(!isCard && selectedInsets != null &&
+			 (selectedInsets.top != 0 || selectedInsets.left != 0 ||
+			  selectedInsets.bottom != 0 || selectedInsets.right != 0)) )
+		{
+			Color background = tabPane.getBackgroundAt( tabIndex );
+			g.setColor( FlatUIUtils.deriveColor( background, tabPane.getBackground() ) );
+			g.fillRect( x, y, w, h );
+		}
+
+		// apply insets
+		if( !isCard && selectedInsets != null ) {
+			Insets insets = new Insets( 0, 0, 0, 0 );
+			rotateInsets( selectedInsets, insets, tabPane.getTabPlacement() );
+
+			x += scale( insets.left );
+			y += scale( insets.top );
+			w -= scale( insets.left + insets.right );
+			h -= scale( insets.top + insets.bottom );
+		}
+
 		// paint tab background
 		Color background = getTabBackground( tabPlacement, tabIndex, isSelected );
 		g.setColor( FlatUIUtils.deriveColor( background, tabPane.getBackground() ) );
-		g.fillRect( x, y, w, h );
+		if( !isCard && tabArc > 0 ) {
+			float arc = scale( (float) tabArc ) / 2f;
+			FlatUIUtils.paintSelection( (Graphics2D) g, x, y, w, h, null, arc, arc, arc, arc, 0 );
+		} else if( isCard && cardTabArc > 0 )
+			((Graphics2D)g).fill( createCardTabOuterPath( tabPlacement, x, y, w, h ) );
+		else
+			g.fillRect( x, y, w, h );
 	}
 
 	/** @since 2 */
 	protected Color getTabBackground( int tabPlacement, int tabIndex, boolean isSelected ) {
-		boolean enabled = tabPane.isEnabled();
-		return enabled && tabPane.isEnabledAt( tabIndex ) && getRolloverTab() == tabIndex
-			? hoverColor
-			: (enabled && isSelected && FlatUIUtils.isPermanentFocusOwner( tabPane )
-				? focusColor
-				: (selectedBackground != null && enabled && isSelected
-					? selectedBackground
-					: tabPane.getBackgroundAt( tabIndex )));
+		Color background = tabPane.getBackgroundAt( tabIndex );
+
+		// tabbed pane or tab is disabled
+		if( !tabPane.isEnabled() || !tabPane.isEnabledAt( tabIndex ) )
+			return background;
+
+		// hover
+		if( hoverColor != null && getRolloverTab() == tabIndex )
+			return hoverColor;
+
+		// tab background (if set)
+		if( background != tabPane.getBackground() )
+			return background;
+
+		// focused and selected
+		if( focusColor != null && isSelected && FlatUIUtils.isPermanentFocusOwner( tabPane ) )
+			return focusColor;
+		if( selectedBackground != null && isSelected )
+			return selectedBackground;
+
+		return background;
 	}
 
 	@Override
@@ -1205,42 +1288,38 @@ public class FlatTabbedPaneUI
 	protected void paintCardTabBorder( Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h ) {
 		Graphics2D g2 = (Graphics2D) g;
 
-		float borderWidth = scale( (float) contentSeparatorHeight );
+		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
+		path.append( createCardTabOuterPath( tabPlacement, x, y, w, h ), false );
+		path.append( createCardTabInnerPath( tabPlacement, x, y, w, h ), false );
+
 		g.setColor( (tabSeparatorColor != null) ? tabSeparatorColor : contentAreaColor );
+		g2.fill( path );
+	}
+
+	/** @since 3.2 */
+	protected Shape createCardTabOuterPath( int tabPlacement, int x, int y, int w, int h ) {
+		float arc = scale( (float) cardTabArc ) / 2f;
 
 		switch( tabPlacement ) {
 			default:
-			case TOP:
-			case BOTTOM:
-				// paint left and right tab border
-				g2.fill( new Rectangle2D.Float( x, y, borderWidth, h ) );
-				g2.fill( new Rectangle2D.Float( x + w - borderWidth, y, borderWidth, h ) );
-				break;
-			case LEFT:
-			case RIGHT:
-				// paint top and bottom tab border
-				g2.fill( new Rectangle2D.Float( x, y, w, borderWidth ) );
-				g2.fill( new Rectangle2D.Float( x, y + h - borderWidth, w, borderWidth ) );
-				break;
+			case TOP:    return FlatUIUtils.createRoundRectanglePath( x, y, w, h, arc, arc, 0, 0 );
+			case BOTTOM: return FlatUIUtils.createRoundRectanglePath( x, y, w, h, 0, 0, arc, arc );
+			case LEFT:   return FlatUIUtils.createRoundRectanglePath( x, y, w, h, arc, 0, arc, 0 );
+			case RIGHT:  return FlatUIUtils.createRoundRectanglePath( x, y, w, h, 0, arc, 0, arc );
 		}
+	}
 
-		if( cardTabSelectionHeight <= 0 ) {
-			// if there is no tab selection indicator, paint a top border as well
-			switch( tabPlacement ) {
-				default:
-				case TOP:
-					g2.fill( new Rectangle2D.Float( x, y, w, borderWidth ) );
-					break;
-				case BOTTOM:
-					g2.fill( new Rectangle2D.Float( x, y + h - borderWidth, w, borderWidth ) );
-					break;
-				case LEFT:
-					g2.fill( new Rectangle2D.Float( x, y, borderWidth, h ) );
-					break;
-				case RIGHT:
-					g2.fill( new Rectangle2D.Float( x + w - borderWidth, y, borderWidth, h ) );
-					break;
-			}
+	/** @since 3.2 */
+	protected Shape createCardTabInnerPath( int tabPlacement, int x, int y, int w, int h ) {
+		float bw = scale( (float) contentSeparatorHeight );
+		float arc = (scale( (float) cardTabArc ) / 2f) - bw;
+
+		switch( tabPlacement ) {
+			default:
+			case TOP:    return FlatUIUtils.createRoundRectanglePath( x + bw, y + bw, w - (bw * 2), h - bw,       arc, arc, 0, 0 );
+			case BOTTOM: return FlatUIUtils.createRoundRectanglePath( x + bw, y,      w - (bw * 2), h - bw,       0, 0, arc, arc );
+			case LEFT:   return FlatUIUtils.createRoundRectanglePath( x + bw, y + bw, w - bw,       h - (bw * 2), arc, 0, arc, 0 );
+			case RIGHT:  return FlatUIUtils.createRoundRectanglePath( x,      y + bw, w - bw,       h - (bw * 2), 0, arc, 0, arc );
 		}
 	}
 
@@ -1288,38 +1367,62 @@ public class FlatTabbedPaneUI
 			? (isTabbedPaneOrChildFocused() ? underlineColor : inactiveUnderlineColor)
 			: disabledUnderlineColor );
 
-		// paint underline selection
-		boolean atBottom = (getTabType() != TAB_TYPE_CARD);
+		boolean isCard = (getTabType() == TAB_TYPE_CARD);
+		boolean atBottom = !isCard;
 		Insets contentInsets = atBottom
 			? ((!rotateTabRuns && runCount > 1 && !isScrollTabLayout() && getRunForTab( tabPane.getTabCount(), tabIndex ) > 0)
 				? new Insets( 0, 0, 0, 0 )
 				: getContentBorderInsets( tabPlacement ))
 			: null;
 
-		int tabSelectionHeight = scale( atBottom ? this.tabSelectionHeight : cardTabSelectionHeight );
-		int sx, sy;
+		int tabSelectionHeight = scale( isCard ? cardTabSelectionHeight : this.tabSelectionHeight );
+		float arc = scale( (float) (isCard ? cardTabArc : tabSelectionArc) ) / 2f;
+		int sx = x, sy = y, sw = w, sh = h;
 		switch( tabPlacement ) {
 			case TOP:
 			default:
 				sy = atBottom ? (y + h + contentInsets.top - tabSelectionHeight) : y;
-				g.fillRect( x, sy, w, tabSelectionHeight );
+				sh = tabSelectionHeight;
 				break;
 
 			case BOTTOM:
 				sy = atBottom ? (y - contentInsets.bottom) : (y + h - tabSelectionHeight);
-				g.fillRect( x, sy, w, tabSelectionHeight );
+				sh = tabSelectionHeight;
 				break;
 
 			case LEFT:
 				sx = atBottom ? (x + w + contentInsets.left - tabSelectionHeight) : x;
-				g.fillRect( sx, y, tabSelectionHeight, h );
+				sw = tabSelectionHeight;
 				break;
 
 			case RIGHT:
 				sx = atBottom ? (x - contentInsets.right) : (x + w - tabSelectionHeight);
-				g.fillRect( sx, y, tabSelectionHeight, h );
+				sw = tabSelectionHeight;
 				break;
 		}
+
+		// apply insets
+		if( !isCard && tabSelectionInsets != null ) {
+			Insets insets = new Insets( 0, 0, 0, 0 );
+			rotateInsets( tabSelectionInsets, insets, tabPane.getTabPlacement() );
+
+			sx += scale( insets.left );
+			sy += scale( insets.top );
+			sw -= scale( insets.left + insets.right );
+			sh -= scale( insets.top + insets.bottom );
+		}
+
+		// paint underline selection
+		if( arc <= 0 )
+			g.fillRect( sx, sy, sw, sh );
+		else {
+			if( isCard ) {
+				Area area = new Area( createCardTabOuterPath( tabPlacement, x, y, w, h ) );
+				area.intersect( new Area( new Rectangle2D.Float( sx, sy, sw, sh ) ) );
+				((Graphics2D)g).fill( area );
+			} else
+				FlatUIUtils.paintSelection( (Graphics2D) g, sx, sy, sw, sh, null, arc, arc, arc, arc, 0 );
+		}
 	}
 
 	/** @since 2.2 */
@@ -1431,7 +1534,8 @@ public class FlatTabbedPaneUI
 				path.append( gap, false );
 
 				// fill gap in case that the tab is colored (e.g. focused or hover)
-				g.setColor( getTabBackground( tabPlacement, selectedIndex, true ) );
+				Color background = getTabBackground( tabPlacement, selectedIndex, true );
+				g.setColor( FlatUIUtils.deriveColor( background, tabPane.getBackground() ) );
 				((Graphics2D)g).fill( gap );
 			}
 		}
@@ -1930,7 +2034,7 @@ public class FlatTabbedPaneUI
 
 	//---- class TabCloseButton -----------------------------------------------
 
-	private class TabCloseButton
+	private static class TabCloseButton
 		extends JButton
 		implements UIResource
 	{
@@ -1940,7 +2044,7 @@ public class FlatTabbedPaneUI
 
 	//---- class ContainerUIResource ------------------------------------------
 
-	private class ContainerUIResource
+	private static class ContainerUIResource
 		extends JPanel
 		implements UIResource
 	{
@@ -2345,7 +2449,7 @@ public class FlatTabbedPaneUI
 			if( isPreciseWheel &&
 				getScrollButtonsPlacement() == BOTH &&
 				getScrollButtonsPolicy() == AS_NEEDED_SINGLE &&
-				(isLeftToRight() || !horizontal) || // scroll buttons are hidden in right-to-left
+				(isLeftToRight() || !horizontal) && // scroll buttons are hidden in right-to-left
 				scrollBackwardButtonPrefSize != null )
 			{
 				// special cases for scrolling with touchpad or high-resolution wheel:
@@ -2589,7 +2693,7 @@ public class FlatTabbedPaneUI
 		public void mousePressed( MouseEvent e ) {
 			updateRollover( e );
 
-			if( !isPressedTabClose() )
+			if( !isPressedTabClose() && SwingUtilities.isLeftMouseButton( e ) )
 				mouseDelegate.mousePressed( e );
 		}
 
@@ -2644,7 +2748,7 @@ public class FlatTabbedPaneUI
 
 			// check whether mouse hit tab close area
 			boolean hitClose = isTabClosable( tabIndex ) && getTabCloseHitArea( tabIndex ).contains( x, y );
-			if( e.getID() == MouseEvent.MOUSE_PRESSED )
+			if( e.getID() == MouseEvent.MOUSE_PRESSED && SwingUtilities.isLeftMouseButton( e ) )
 				pressedTabIndex = hitClose ? tabIndex : -1;
 			setRolloverTabClose( hitClose );
 			setPressedTabClose( hitClose && tabIndex == pressedTabIndex );
@@ -3014,7 +3118,7 @@ public class FlatTabbedPaneUI
 							break;
 
 						case CENTER:
-							shiftTabs( 0, (diff) / 2 );
+							shiftTabs( 0, diff / 2 );
 							topHeight += diff / 2;
 							bottomHeight += diff - (diff / 2);
 							break;
@@ -3463,7 +3567,7 @@ public class FlatTabbedPaneUI
 	//---- class FlatSelectedTabRepainter -------------------------------------
 
 	private static class FlatSelectedTabRepainter
-		implements PropertyChangeListener//, Runnable
+		implements PropertyChangeListener
 	{
 		private static FlatSelectedTabRepainter instance;
 
@@ -3513,17 +3617,31 @@ public class FlatTabbedPaneUI
 					break;
 
 				case "activeWindow":
-					repaintSelectedTabs( keyboardFocusManager.getPermanentFocusOwner() );
+					Component permanentFocusOwner = keyboardFocusManager.getPermanentFocusOwner();
+					if( permanentFocusOwner != null )
+						repaintSelectedTabs( permanentFocusOwner );
 					break;
 			}
 		}
 
 		private void repaintSelectedTabs( Component c ) {
-			if( c instanceof JTabbedPane )
-				repaintSelectedTab( (JTabbedPane) c );
+			// Use invokeLater because this method may be invoked while UI update
+			// is in progress. This may happen if a focusable component (e.g. text field)
+			// is used as tab component (see JTabbedPane.setTabComponentAt()).
+			// uninstallTabContainer() removes all components from tabbed pane and
+			// the text field looses focus.
+			EventQueue.invokeLater( () -> {
+				// because this is invoked later, check whether component is still displayable
+				if( !c.isDisplayable() )
+					return;
 
-			while( (c = SwingUtilities.getAncestorOfClass( JTabbedPane.class, c )) != null )
-				repaintSelectedTab( (JTabbedPane) c );
+				if( c instanceof JTabbedPane )
+					repaintSelectedTab( (JTabbedPane) c );
+
+				Component c2 = c;
+				while( (c2 = SwingUtilities.getAncestorOfClass( JTabbedPane.class, c2 )) != null )
+					repaintSelectedTab( (JTabbedPane) c2 );
+			} );
 		}
 
 		private void repaintSelectedTab( JTabbedPane tabbedPane ) {

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

@@ -24,6 +24,7 @@ import java.util.function.Function;
 import javax.swing.JTable;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
+import javax.swing.border.Border;
 import javax.swing.plaf.TableUI;
 
 /**
@@ -107,17 +108,55 @@ public class FlatTableCellBorder
 	public static class Focused
 		extends FlatTableCellBorder
 	{
+		@Override
+		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+			if( c != null && c.getClass().getName().equals( "javax.swing.JTable$BooleanRenderer" ) ) {
+				// boolean renderer in JTable does not use Table.focusSelectedCellHighlightBorder
+				// if cell is selected and focused (as DefaultTableCellRenderer does)
+				// --> delegate to Table.focusSelectedCellHighlightBorder
+				//     to make FlatLaf "focus indicator border hiding" work
+				JTable table = (JTable) SwingUtilities.getAncestorOfClass( JTable.class, c );
+				if( table != null &&
+					c.getForeground() == table.getSelectionForeground() &&
+					c.getBackground() == table.getSelectionBackground() )
+				{
+					Border border = UIManager.getBorder( "Table.focusSelectedCellHighlightBorder" );
+					if( border != null ) {
+						border.paintBorder( c, g, x, y, width, height );
+						return;
+					}
+				}
+			}
+
+			super.paintBorder( c, g, x, y, width, height );
+		}
 	}
 
 	//---- class Selected -----------------------------------------------------
 
 	/**
-	 * Border for selected cell that uses margins and paints focus indicator border
-	 * if enabled (Table.showCellFocusIndicator=true) or at least one selected cell is editable.
+	 * Border for selected cell that uses margins and paints focus indicator border.
+	 * The focus indicator is shown under following conditions:
+	 * <ul>
+	 * <li>always if enabled via UI property {@code Table.showCellFocusIndicator=true}
+	 * <li>for row selection mode if exactly one row is selected and at least one cell in that row is editable
+	 * <li>for column selection mode if exactly one column is selected and at least one cell in that column is editable
+	 * <li>never for cell selection mode
+	 * </ul>
+	 * The reason for this logic is to hide the focus indicator when it is not needed,
+	 * and only show it when there are editable cells and the user needs to know
+	 * which cell is focused to start editing.
+	 * <p>
+	 * To avoid possible performance issues, checking for editable cells is limited
+	 * to {@link #maxCheckCellsEditable}. If there are more cells to check,
+	 * the focus indicator is always shown.
 	 */
 	public static class Selected
 		extends FlatTableCellBorder
 	{
+		/** @since 3.1 */
+		public int maxCheckCellsEditable = 50;
+
 		@Override
 		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 			Boolean b = getStyleFromTableUI( c, ui -> ui.showCellFocusIndicator );
@@ -125,7 +164,7 @@ public class FlatTableCellBorder
 
 			if( !showCellFocusIndicator ) {
 				JTable table = (JTable) SwingUtilities.getAncestorOfClass( JTable.class, c );
-				if( table != null && !isSelectionEditable( table ) )
+				if( table != null && !shouldShowCellFocusIndicator( table ) )
 					return;
 			}
 
@@ -133,28 +172,57 @@ public class FlatTableCellBorder
 		}
 
 		/**
-		 * Checks whether at least one selected cell is editable.
+		 * Returns whether focus indicator border should be shown.
+		 *
+		 * @since 3.1
 		 */
-		protected boolean isSelectionEditable( JTable table ) {
-			if( table.getRowSelectionAllowed() ) {
-				int columnCount = table.getColumnCount();
-				int[] selectedRows = table.getSelectedRows();
-				for( int selectedRow : selectedRows ) {
-					for( int column = 0; column < columnCount; column++ ) {
-						if( table.isCellEditable( selectedRow, column ) )
-							return true;
-					}
-				}
-			}
+		protected boolean shouldShowCellFocusIndicator( JTable table ) {
+			boolean rowSelectionAllowed = table.getRowSelectionAllowed();
+			boolean columnSelectionAllowed = table.getColumnSelectionAllowed();
 
-			if( table.getColumnSelectionAllowed() ) {
+			// do not show for cell selection mode
+			// (unlikely that user wants edit cell in case that multiple cells are selected;
+			// if only a single cell is selected then it is clear where the focus is)
+			if( rowSelectionAllowed && columnSelectionAllowed )
+				return false;
+
+			if( rowSelectionAllowed ) {
+				// row selection mode
+
+				// do not show if more than one row is selected
+				// (unlikely that user wants edit cell in this case)
+				if( table.getSelectedRowCount() != 1 )
+					return false;
+
+				// show always if there are too many columns to check for editable
+				int columnCount = table.getColumnCount();
+				if( columnCount > maxCheckCellsEditable )
+					return true;
+
+				// check whether at least one selected cell is editable
+				int selectedRow = table.getSelectedRow();
+				for( int column = 0; column < columnCount; column++ ) {
+					if( table.isCellEditable( selectedRow, column ) )
+						return true;
+				}
+			} else if( columnSelectionAllowed ) {
+				// column selection mode
+
+				// do not show if more than one column is selected
+				// (unlikely that user wants edit cell in this case)
+				if( table.getSelectedColumnCount() != 1 )
+					return false;
+
+				// show always if there are too many rows to check for editable
 				int rowCount = table.getRowCount();
-				int[] selectedColumns = table.getSelectedColumns();
-				for( int selectedColumn : selectedColumns ) {
-					for( int row = 0; row < rowCount; row++ ) {
-						if( table.isCellEditable( row, selectedColumn ) )
-							return true;
-					}
+				if( rowCount > maxCheckCellsEditable )
+					return true;
+
+				// check whether at least one selected cell is editable
+				int selectedColumn = table.getSelectedColumn();
+				for( int row = 0; row < rowCount; row++ ) {
+					if( table.isCellEditable( row, selectedColumn ) )
+						return true;
 				}
 			}
 

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

@@ -59,6 +59,10 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * <!-- FlatTableHeaderUI -->
  *
+ * @uiDefault TableHeader.hoverBackground		Color	optional
+ * @uiDefault TableHeader.hoverForeground		Color	optional
+ * @uiDefault TableHeader.pressedBackground		Color	optional
+ * @uiDefault TableHeader.pressedForeground		Color	optional
  * @uiDefault TableHeader.bottomSeparatorColor	Color
  * @uiDefault TableHeader.height				int
  * @uiDefault TableHeader.sortIconPosition		String	right (default), left, top or bottom
@@ -81,6 +85,10 @@ public class FlatTableHeaderUI
 	extends BasicTableHeaderUI
 	implements StyleableUI
 {
+	/** @since 3.1 */ @Styleable protected Color hoverBackground;
+	/** @since 3.1 */ @Styleable protected Color hoverForeground;
+	/** @since 3.1 */ @Styleable protected Color pressedBackground;
+	/** @since 3.1 */ @Styleable protected Color pressedForeground;
 	@Styleable protected Color bottomSeparatorColor;
 	@Styleable protected int height;
 	@Styleable(type=String.class) protected int sortIconPosition;
@@ -113,6 +121,10 @@ public class FlatTableHeaderUI
 	protected void installDefaults() {
 		super.installDefaults();
 
+		hoverBackground = UIManager.getColor( "TableHeader.hoverBackground" );
+		hoverForeground = UIManager.getColor( "TableHeader.hoverForeground" );
+		pressedBackground = UIManager.getColor( "TableHeader.pressedBackground" );
+		pressedForeground = UIManager.getColor( "TableHeader.pressedForeground" );
 		bottomSeparatorColor = UIManager.getColor( "TableHeader.bottomSeparatorColor" );
 		height = UIManager.getInt( "TableHeader.height" );
 		sortIconPosition = parseSortIconPosition( UIManager.getString( "TableHeader.sortIconPosition" ) );
@@ -122,6 +134,10 @@ public class FlatTableHeaderUI
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		hoverBackground = null;
+		hoverForeground = null;
+		pressedBackground = null;
+		pressedForeground = null;
 		bottomSeparatorColor = null;
 
 		oldStyleValues = null;
@@ -211,6 +227,12 @@ public class FlatTableHeaderUI
 		return super.getRolloverColumn();
 	}
 
+	@Override
+	protected void rolloverColumnUpdated( int oldColumn, int newColumn ) {
+		header.repaint( header.getHeaderRect( oldColumn ) );
+		header.repaint( header.getHeaderRect( newColumn ) );
+	}
+
 	@Override
 	public void paint( Graphics g, JComponent c ) {
 		fixDraggedAndResizingColumns( header );
@@ -243,21 +265,16 @@ public class FlatTableHeaderUI
 			}
 		}
 
-		// temporary use own default renderer if necessary
-		FlatTableCellHeaderRenderer sortIconRenderer = null;
-		if( sortIconPosition != SwingConstants.RIGHT ) {
-			sortIconRenderer = new FlatTableCellHeaderRenderer( header.getDefaultRenderer() );
-			header.setDefaultRenderer( sortIconRenderer );
-		}
+		// temporary use own default renderer
+		FlatTableCellHeaderRenderer tempRenderer = new FlatTableCellHeaderRenderer( header.getDefaultRenderer() );
+		header.setDefaultRenderer( tempRenderer );
 
 		// paint header
 		super.paint( g, c );
 
 		// restore default renderer
-		if( sortIconRenderer != null ) {
-			sortIconRenderer.reset();
-			header.setDefaultRenderer( sortIconRenderer.delegate );
-		}
+		tempRenderer.reset();
+		header.setDefaultRenderer( tempRenderer.delegate );
 	}
 
 	private boolean isSystemDefaultRenderer( Object headerRenderer ) {
@@ -318,8 +335,8 @@ public class FlatTableHeaderUI
 	//---- class FlatTableCellHeaderRenderer ----------------------------------
 
 	/**
-	 * A delegating header renderer that is only used to paint sort arrows at
-	 * top, bottom or left position.
+	 * A delegating header renderer that is only used to paint hover and pressed
+	 * background/foreground and to paint sort arrows at top, bottom or left position.
 	 */
 	private class FlatTableCellHeaderRenderer
 		implements TableCellRenderer, Border, UIResource
@@ -327,6 +344,9 @@ public class FlatTableHeaderUI
 		private final TableCellRenderer delegate;
 
 		private JLabel l;
+		private Color oldBackground;
+		private Color oldForeground;
+		private Boolean oldOpaque;
 		private int oldHorizontalTextPosition = -1;
 		private Border origBorder;
 		private Icon sortIcon;
@@ -345,11 +365,38 @@ public class FlatTableHeaderUI
 
 			l = (JLabel) c;
 
+			// hover and pressed background/foreground
+			TableColumn draggedColumn = header.getDraggedColumn();
+			Color background = null;
+			Color foreground = null;
+			if( draggedColumn != null && header.getTable().convertColumnIndexToView( draggedColumn.getModelIndex() ) == column ) {
+				background = pressedBackground;
+				foreground = pressedForeground;
+			} else if( getRolloverColumn() == column ) {
+				background = hoverBackground;
+				foreground = hoverForeground;
+			}
+			if( background != null ) {
+				if( oldBackground == null )
+					oldBackground = l.getBackground();
+				if( oldOpaque == null )
+					oldOpaque = l.isOpaque();
+				l.setBackground( FlatUIUtils.deriveColor( background, header.getBackground() ) );
+				l.setOpaque( true );
+			}
+			if( foreground != null ) {
+				if( oldForeground == null )
+					oldForeground = l.getForeground();
+				l.setForeground( FlatUIUtils.deriveColor( foreground, header.getForeground() ) );
+			}
+
+			// sort icon
 			if( sortIconPosition == SwingConstants.LEFT ) {
+				// left
 				if( oldHorizontalTextPosition < 0 )
 					oldHorizontalTextPosition = l.getHorizontalTextPosition();
 				l.setHorizontalTextPosition( SwingConstants.RIGHT );
-			} else {
+			} else if( sortIconPosition == SwingConstants.TOP || sortIconPosition == SwingConstants.BOTTOM ) {
 				// top or bottom
 				sortIcon = l.getIcon();
 				origBorder = l.getBorder();
@@ -361,7 +408,16 @@ public class FlatTableHeaderUI
 		}
 
 		void reset() {
-			if( l != null && sortIconPosition == SwingConstants.LEFT && oldHorizontalTextPosition >= 0 )
+			if( l == null )
+				return;
+
+			if( oldBackground != null )
+				l.setBackground( oldBackground );
+			if( oldForeground != null )
+				l.setForeground( oldForeground );
+			if( oldOpaque != null )
+				l.setOpaque( oldOpaque );
+			if( oldHorizontalTextPosition >= 0 )
 				l.setHorizontalTextPosition( oldHorizontalTextPosition );
 		}
 

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

@@ -277,6 +277,9 @@ public class FlatTableUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
+		if( "rowHeight".equals( key ) && value instanceof Integer )
+			value = UIScale.scale( (Integer) value );
+
 		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, table, key, value );
 	}
 

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

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

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

@@ -45,6 +45,7 @@ import javax.swing.JTextField;
 import javax.swing.JToggleButton;
 import javax.swing.JToolBar;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.event.DocumentEvent;
 import javax.swing.event.DocumentListener;
@@ -81,7 +82,6 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * <!-- FlatTextFieldUI -->
  *
  * @uiDefault Component.minimumWidth			int
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault TextField.placeholderForeground	Color
  * @uiDefault TextField.focusedBackground		Color	optional
  * @uiDefault TextField.iconTextGap				int		optional, default is 4
@@ -95,7 +95,6 @@ public class FlatTextFieldUI
 	implements StyleableUI
 {
 	@Styleable protected int minimumWidth;
-	protected boolean isIntelliJTheme;
 	private Color background;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color inactiveBackground;
@@ -165,7 +164,6 @@ public class FlatTextFieldUI
 
 		String prefix = getPropertyPrefix();
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		background = UIManager.getColor( prefix + ".background" );
 		disabledBackground = UIManager.getColor( prefix + ".disabledBackground" );
 		inactiveBackground = UIManager.getColor( prefix + ".inactiveBackground" );
@@ -402,7 +400,7 @@ public class FlatTextFieldUI
 
 	@Override
 	protected void paintSafely( Graphics g ) {
-		paintBackground( g, getComponent(), isIntelliJTheme, focusedBackground );
+		paintBackground( g, getComponent(), focusedBackground );
 		paintPlaceholder( g );
 
 		if( hasLeadingIcon() || hasTrailingIcon() )
@@ -422,7 +420,7 @@ debug*/
 		// background is painted elsewhere
 	}
 
-	static void paintBackground( Graphics g, JTextComponent c, boolean isIntelliJTheme, Color focusedBackground ) {
+	static void paintBackground( Graphics g, JTextComponent c, Color focusedBackground ) {
 		// do not paint background if:
 		//   - not opaque and
 		//   - border is not a flat border and
@@ -443,14 +441,14 @@ debug*/
 		try {
 			FlatUIUtils.setRenderingHints( g2 );
 
-			g2.setColor( getBackground( c, isIntelliJTheme, focusedBackground ) );
+			g2.setColor( getBackground( c, focusedBackground ) );
 			FlatUIUtils.paintComponentBackground( g2, 0, 0, c.getWidth(), c.getHeight(), focusWidth, arc );
 		} finally {
 			g2.dispose();
 		}
 	}
 
-	static Color getBackground( JTextComponent c, boolean isIntelliJTheme, Color focusedBackground ) {
+	static Color getBackground( JTextComponent c, Color focusedBackground ) {
 		Color background = c.getBackground();
 
 		// always use explicitly set color
@@ -461,10 +459,6 @@ debug*/
 		if( focusedBackground != null && FlatUIUtils.isPermanentFocusOwner( c ) )
 			return focusedBackground;
 
-		// for compatibility with IntelliJ themes
-		if( isIntelliJTheme && (!c.isEnabled() || !c.isEditable()) )
-			return FlatUIUtils.getParentBackground( c );
-
 		return background;
 	}
 
@@ -487,10 +481,22 @@ debug*/
 		// compute placeholder location
 		Rectangle r = getVisibleEditorRect();
 		FontMetrics fm = c.getFontMetrics( c.getFont() );
-		String clippedPlaceholder = JavaCompatibility.getClippedString( c, fm, placeholder, r.width );
-		int x = r.x + (isLeftToRight() ? 0 : r.width - fm.stringWidth( clippedPlaceholder ));
+		int x = r.x;
 		int y = r.y + fm.getAscent() + ((r.height - fm.getHeight()) / 2);
 
+		// apply horizontal alignment to x location
+		String clippedPlaceholder = JavaCompatibility.getClippedString( c, fm, placeholder, r.width );
+		int stringWidth = fm.stringWidth( clippedPlaceholder );
+		int halign = (c instanceof JTextField) ? ((JTextField)c).getHorizontalAlignment() : SwingConstants.LEADING;
+		if( halign == SwingConstants.LEADING )
+			halign = isLeftToRight() ? SwingConstants.LEFT : SwingConstants.RIGHT;
+		else if( halign == SwingConstants.TRAILING )
+			halign = isLeftToRight() ? SwingConstants.RIGHT : SwingConstants.LEFT;
+		if( halign == SwingConstants.RIGHT )
+			x += r.width - stringWidth;
+		else if( halign == SwingConstants.CENTER )
+			x = Math.max( 0, x + (r.width / 2) - (stringWidth / 2) );
+
 		// paint placeholder
 		g.setColor( placeholderForeground );
 		FlatUIUtils.drawString( c, g, clippedPlaceholder, x, y );

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

@@ -56,7 +56,6 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * <!-- FlatTextPaneUI -->
  *
  * @uiDefault Component.minimumWidth			int
- * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault TextPane.focusedBackground		Color	optional
  *
  * @author Karl Tauber
@@ -66,7 +65,6 @@ public class FlatTextPaneUI
 	implements StyleableUI
 {
 	@Styleable protected int minimumWidth;
-	protected boolean isIntelliJTheme;
 	private Color background;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color inactiveBackground;
@@ -98,7 +96,6 @@ public class FlatTextPaneUI
 
 		String prefix = getPropertyPrefix();
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
-		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		background = UIManager.getColor( prefix + ".background" );
 		disabledBackground = UIManager.getColor( prefix + ".disabledBackground" );
 		inactiveBackground = UIManager.getColor( prefix + ".inactiveBackground" );
@@ -220,6 +217,6 @@ public class FlatTextPaneUI
 
 	@Override
 	protected void paintBackground( Graphics g ) {
-		FlatEditorPaneUI.paintBackground( g, getComponent(), isIntelliJTheme, focusedBackground );
+		FlatEditorPaneUI.paintBackground( g, getComponent(), focusedBackground );
 	}
 }

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

@@ -57,6 +57,7 @@ import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JComponent;
 import javax.swing.JDialog;
+import javax.swing.JInternalFrame;
 import javax.swing.JLabel;
 import javax.swing.JMenuBar;
 import javax.swing.JPanel;
@@ -96,6 +97,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TitlePane.centerTitleIfMenuBarEmbedded		boolean
  * @uiDefault TitlePane.showIconBesideTitle					boolean
  * @uiDefault TitlePane.menuBarTitleGap						int
+ * @uiDefault TitlePane.menuBarTitleMinimumGap				int
  * @uiDefault TitlePane.menuBarResizeHeight					int
  * @uiDefault TitlePane.closeIcon							Icon
  * @uiDefault TitlePane.iconifyIcon							Icon
@@ -107,29 +109,32 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatTitlePane
 	extends JComponent
 {
-	/** @since 2.5 */ protected final Font titleFont = UIManager.getFont( "TitlePane.font" );
-	protected final Color activeBackground = UIManager.getColor( "TitlePane.background" );
-	protected final Color inactiveBackground = UIManager.getColor( "TitlePane.inactiveBackground" );
-	protected final Color activeForeground = UIManager.getColor( "TitlePane.foreground" );
-	protected final Color inactiveForeground = UIManager.getColor( "TitlePane.inactiveForeground" );
-	protected final Color embeddedForeground = UIManager.getColor( "TitlePane.embeddedForeground" );
-	protected final Color borderColor = UIManager.getColor( "TitlePane.borderColor" );
+	private static final String KEY_DEBUG_SHOW_RECTANGLES = "FlatLaf.debug.titlebar.showRectangles";
 
-	/** @since 2 */ protected final boolean showIcon = FlatUIUtils.getUIBoolean( "TitlePane.showIcon", true );
-	/** @since 2.5 */ protected final boolean showIconInDialogs = FlatUIUtils.getUIBoolean( "TitlePane.showIconInDialogs", true );
-	/** @since 2 */ protected final int noIconLeftGap = FlatUIUtils.getUIInt( "TitlePane.noIconLeftGap", 8 );
-	protected final Dimension iconSize = UIManager.getDimension( "TitlePane.iconSize" );
-	/** @since 2.4 */ protected final int titleMinimumWidth = FlatUIUtils.getUIInt( "TitlePane.titleMinimumWidth", 60 );
-	/** @since 2.4 */ protected final int buttonMinimumWidth = FlatUIUtils.getUIInt( "TitlePane.buttonMinimumWidth", 30 );
-	protected final int buttonMaximizedHeight = UIManager.getInt( "TitlePane.buttonMaximizedHeight" );
-	protected final boolean centerTitle = UIManager.getBoolean( "TitlePane.centerTitle" );
-	protected final boolean centerTitleIfMenuBarEmbedded = FlatUIUtils.getUIBoolean( "TitlePane.centerTitleIfMenuBarEmbedded", true );
-	/** @since 2.4 */ protected final boolean showIconBesideTitle = UIManager.getBoolean( "TitlePane.showIconBesideTitle" );
-	protected final int menuBarTitleGap = FlatUIUtils.getUIInt( "TitlePane.menuBarTitleGap", 40 );
-	/** @since 2.4 */ protected final int menuBarTitleMinimumGap = FlatUIUtils.getUIInt( "TitlePane.menuBarTitleMinimumGap", 12 );
-	/** @since 2.4 */ protected final int menuBarResizeHeight = FlatUIUtils.getUIInt( "TitlePane.menuBarResizeHeight", 4 );
+	/** @since 2.5 */ protected final Font titleFont;
+	protected final Color activeBackground;
+	protected final Color inactiveBackground;
+	protected final Color activeForeground;
+	protected final Color inactiveForeground;
+	protected final Color embeddedForeground;
+	protected final Color borderColor;
+
+	/** @since 2 */ protected final boolean showIcon;
+	/** @since 2.5 */ protected final boolean showIconInDialogs;
+	/** @since 2 */ protected final int noIconLeftGap;
+	protected final Dimension iconSize;
+	/** @since 2.4 */ protected final int titleMinimumWidth;
+	/** @since 2.4 */ protected final int buttonMinimumWidth;
+	protected final int buttonMaximizedHeight;
+	protected final boolean centerTitle;
+	protected final boolean centerTitleIfMenuBarEmbedded;
+	/** @since 2.4 */ protected final boolean showIconBesideTitle;
+	protected final int menuBarTitleGap;
+	/** @since 2.4 */ protected final int menuBarTitleMinimumGap;
+	/** @since 2.4 */ protected final int menuBarResizeHeight;
 
 	protected final JRootPane rootPane;
+	protected final String windowStyle;
 
 	protected JPanel leftPanel;
 	protected JLabel iconLabel;
@@ -148,6 +153,34 @@ public class FlatTitlePane
 	public FlatTitlePane( JRootPane rootPane ) {
 		this.rootPane = rootPane;
 
+		Window w = SwingUtilities.getWindowAncestor( rootPane );
+		String defaultWindowStyle = (w != null && w.getType() == Window.Type.UTILITY) ? WINDOW_STYLE_SMALL : null;
+		windowStyle = clientProperty( rootPane, WINDOW_STYLE, defaultWindowStyle, String.class );
+
+		titleFont = FlatUIUtils.getSubUIFont( "TitlePane.font", windowStyle );
+		activeBackground = FlatUIUtils.getSubUIColor( "TitlePane.background", windowStyle );
+		inactiveBackground = FlatUIUtils.getSubUIColor( "TitlePane.inactiveBackground", windowStyle );
+		activeForeground = FlatUIUtils.getSubUIColor( "TitlePane.foreground", windowStyle );
+		inactiveForeground = FlatUIUtils.getSubUIColor( "TitlePane.inactiveForeground", windowStyle );
+		embeddedForeground = FlatUIUtils.getSubUIColor( "TitlePane.embeddedForeground", windowStyle );
+		// not using windowStyle here because TitlePane.borderColor is also used in FlatRootPaneUI
+		borderColor = UIManager.getColor( "TitlePane.borderColor" );
+
+		showIcon = FlatUIUtils.getSubUIBoolean( "TitlePane.showIcon", windowStyle, true );
+		showIconInDialogs = FlatUIUtils.getSubUIBoolean( "TitlePane.showIconInDialogs", windowStyle, true );
+		noIconLeftGap = FlatUIUtils.getSubUIInt( "TitlePane.noIconLeftGap", windowStyle, 8 );
+		iconSize = FlatUIUtils.getSubUIDimension( "TitlePane.iconSize", windowStyle );
+		titleMinimumWidth = FlatUIUtils.getSubUIInt( "TitlePane.titleMinimumWidth", windowStyle, 60 );
+		buttonMinimumWidth = FlatUIUtils.getSubUIInt( "TitlePane.buttonMinimumWidth", windowStyle, 30 );
+		buttonMaximizedHeight = FlatUIUtils.getSubUIInt( "TitlePane.buttonMaximizedHeight", windowStyle, 0 );
+		centerTitle = FlatUIUtils.getSubUIBoolean( "TitlePane.centerTitle", windowStyle, false );
+		centerTitleIfMenuBarEmbedded = FlatUIUtils.getSubUIBoolean( "TitlePane.centerTitleIfMenuBarEmbedded", windowStyle, true );
+		showIconBesideTitle = FlatUIUtils.getSubUIBoolean( "TitlePane.showIconBesideTitle", windowStyle, false );
+		menuBarTitleGap = FlatUIUtils.getSubUIInt( "TitlePane.menuBarTitleGap", windowStyle, 40 );
+		menuBarTitleMinimumGap = FlatUIUtils.getSubUIInt( "TitlePane.menuBarTitleMinimumGap", windowStyle, 12 );
+		menuBarResizeHeight = FlatUIUtils.getSubUIInt( "TitlePane.menuBarResizeHeight", windowStyle, 4 );
+
+
 		handler = createHandler();
 		setBorder( createTitlePaneBorder() );
 
@@ -180,8 +213,8 @@ public class FlatTitlePane
 				setUI( new FlatTitleLabelUI() );
 			}
 		};
-		iconLabel.setBorder( new FlatEmptyBorder( UIManager.getInsets( "TitlePane.iconMargins" ) ) );
-		titleLabel.setBorder( new FlatEmptyBorder( UIManager.getInsets( "TitlePane.titleMargins" ) ) );
+		iconLabel.setBorder( new FlatEmptyBorder( FlatUIUtils.getSubUIInsets( "TitlePane.iconMargins", windowStyle ) ) );
+		titleLabel.setBorder( new FlatEmptyBorder( FlatUIUtils.getSubUIInsets( "TitlePane.titleMargins", windowStyle ) ) );
 
 		leftPanel.setLayout( new BoxLayout( leftPanel, BoxLayout.LINE_AXIS ) );
 		leftPanel.setOpaque( false );
@@ -308,7 +341,7 @@ public class FlatTitlePane
 	}
 
 	protected JButton createButton( String iconKey, String accessibleName, ActionListener action ) {
-		JButton button = new JButton( UIManager.getIcon( iconKey ) ) {
+		JButton button = new JButton( FlatUIUtils.getSubUIIcon( iconKey, windowStyle ) ) {
 			@Override
 			public Dimension getMinimumSize() {
 				// allow the button to shrink if space is rare
@@ -354,16 +387,12 @@ public class FlatTitlePane
 		if( window == null || rootPane.getWindowDecorationStyle() != JRootPane.FRAME )
 			return;
 
+		updateVisibility();
+
 		if( window instanceof Frame ) {
 			Frame frame = (Frame) window;
-			boolean resizable = frame.isResizable();
-			boolean maximized = ((frame.getExtendedState() & Frame.MAXIMIZED_BOTH) != 0);
 
-			iconifyButton.setVisible( true );
-			maximizeButton.setVisible( resizable && !maximized );
-			restoreButton.setVisible( resizable && maximized );
-
-			if( maximized &&
+			if( isWindowMaximized() &&
 				!(SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window )) &&
 				rootPane.getClientProperty( "_flatlaf.maximizedBoundsUpToDate" ) == null )
 			{
@@ -383,14 +412,27 @@ public class FlatTitlePane
 					frame.setExtendedState( oldExtendedState );
 				}
 			}
+		}
+	}
+
+	/** @since 3 */
+	protected void updateVisibility() {
+		titleLabel.setVisible( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_TITLE, true ) );
+		closeButton.setVisible( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_CLOSE, true ) );
+
+		if( window instanceof Frame ) {
+			Frame frame = (Frame) window;
+			boolean maximizable = frame.isResizable() && clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_MAXIMIZE, true );
+			boolean maximized = isWindowMaximized();
+
+			iconifyButton.setVisible( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_ICONIFFY, true ) );
+			maximizeButton.setVisible( maximizable && !maximized );
+			restoreButton.setVisible( maximizable && maximized );
 		} else {
 			// hide buttons because they are only supported in frames
 			iconifyButton.setVisible( false );
 			maximizeButton.setVisible( false );
 			restoreButton.setVisible( false );
-
-			revalidate();
-			repaint();
 		}
 	}
 
@@ -566,11 +608,13 @@ public class FlatTitlePane
 		doLayout();
 	}
 
-/*debug
 	@Override
 	public void paint( Graphics g ) {
 		super.paint( g );
 
+		if( !UIManager.getBoolean( KEY_DEBUG_SHOW_RECTANGLES ) )
+			return;
+
 		if( debugTitleBarHeight > 0 ) {
 			g.setColor( Color.green );
 			g.drawLine( 0, debugTitleBarHeight, getWidth(), debugTitleBarHeight );
@@ -594,7 +638,6 @@ public class FlatTitlePane
 		Point offset = SwingUtilities.convertPoint( this, 0, 0, window );
 		g.drawRect( r.x - offset.x, r.y - offset.y, r.width - 1, r.height - 1 );
 	}
-debug*/
 
 	@Override
 	protected void paintComponent( Graphics g ) {
@@ -630,7 +673,10 @@ debug*/
 
 	/** @since 2.4 */
 	protected boolean isWindowMaximized() {
-		return window instanceof Frame && (((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0;
+		// Windows and macOS use always MAXIMIZED_BOTH.
+		// Only Linux uses MAXIMIZED_VERT and MAXIMIZED_HORIZ (when dragging window to left or right edge).
+		// (searched jdk source code)
+		return window instanceof Frame && (((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) == Frame.MAXIMIZED_BOTH;
 	}
 
 	/**
@@ -648,8 +694,30 @@ debug*/
 		rootPane.putClientProperty( "_flatlaf.maximizedBoundsUpToDate", true );
 
 		// maximize window
-		if( !FlatNativeWindowBorder.showWindow( frame, FlatNativeWindowBorder.Provider.SW_MAXIMIZE ) )
-			frame.setExtendedState( frame.getExtendedState() | Frame.MAXIMIZED_BOTH );
+		if( !FlatNativeWindowBorder.showWindow( frame, FlatNativeWindowBorder.Provider.SW_MAXIMIZE ) ) {
+			int oldState = frame.getExtendedState();
+			int newState = oldState | Frame.MAXIMIZED_BOTH;
+
+			if( SystemInfo.isLinux ) {
+				// Linux supports vertical and horizontal maximization:
+				//   - dragging a window to left or right edge of screen vertically maximizes
+				//     the window to the left or right half of the screen
+				//   - don't know whether user can do horizontal maximization
+				// (Windows and macOS use only MAXIMIZED_BOTH)
+				//
+				// If a window is maximized vertically or horizontally (but not both),
+				// then Frame.setExtendedState() behaves not as expected on Linux.
+				// E.g. if window state is MAXIMIZED_VERT, calling setExtendedState(MAXIMIZED_BOTH)
+				// changes state to MAXIMIZED_HORIZ. But calling setExtendedState(MAXIMIZED_HORIZ)
+				// changes state from MAXIMIZED_VERT to MAXIMIZED_BOTH.
+				// Seems to be a bug in sun.awt.X11.XNETProtocol.requestState(),
+				// which does some strange state XOR-ing...
+				if( (oldState & Frame.MAXIMIZED_BOTH) == Frame.MAXIMIZED_VERT )
+					newState = (oldState & ~Frame.MAXIMIZED_BOTH) | Frame.MAXIMIZED_HORIZ;
+			}
+
+			frame.setExtendedState( newState );
+		}
 	}
 
 	protected void updateMaximizedBounds() {
@@ -753,8 +821,7 @@ debug*/
 		if( !(window instanceof Frame) || !((Frame)window).isResizable() )
 			return;
 
-		Frame frame = (Frame) window;
-		if( (frame.getExtendedState() & Frame.MAXIMIZED_BOTH) != 0 )
+		if( isWindowMaximized() )
 			restore();
 		else
 			maximize();
@@ -916,6 +983,13 @@ debug*/
 			}
 		}
 
+		// allow internal frames in layered pane to be moved/resized when placed over title bar
+		for( Component c : rootPane.getLayeredPane().getComponents() ) {
+			r = (c instanceof JInternalFrame) ? getNativeHitTestSpot( (JInternalFrame) c ) : null;
+			if( r != null )
+				hitTestSpots.add( r );
+		}
+
 		Rectangle minimizeButtonBounds = boundsInWindow( iconifyButton );
 		Rectangle maximizeButtonBounds = boundsInWindow( maximizeButton.isVisible() ? maximizeButton : restoreButton );
 		Rectangle closeButtonBounds = boundsInWindow( closeButton );
@@ -923,15 +997,14 @@ debug*/
 		FlatNativeWindowBorder.setTitleBarHeightAndHitTestSpots( window, titleBarHeight,
 			hitTestSpots, appIconBounds, minimizeButtonBounds, maximizeButtonBounds, closeButtonBounds );
 
-/*debug
 		debugTitleBarHeight = titleBarHeight;
 		debugHitTestSpots = hitTestSpots;
 		debugAppIconBounds = appIconBounds;
 		debugMinimizeButtonBounds = minimizeButtonBounds;
 		debugMaximizeButtonBounds = maximizeButtonBounds;
 		debugCloseButtonBounds = closeButtonBounds;
-		repaint();
-debug*/
+		if( UIManager.getBoolean( KEY_DEBUG_SHOW_RECTANGLES ) )
+			repaint();
 	}
 
 	private Rectangle boundsInWindow( JComponent c ) {
@@ -950,14 +1023,12 @@ debug*/
 		return r;
 	}
 
-/*debug
 	private int debugTitleBarHeight;
 	private List<Rectangle> debugHitTestSpots;
 	private Rectangle debugAppIconBounds;
 	private Rectangle debugMinimizeButtonBounds;
 	private Rectangle debugMaximizeButtonBounds;
 	private Rectangle debugCloseButtonBounds;
-debug*/
 
 	//---- class FlatTitlePaneBorder ------------------------------------------
 
@@ -1178,6 +1249,13 @@ debug*/
 
 		@Override
 		public void windowStateChanged( WindowEvent e ) {
+/*debug
+			System.out.println( "state " + e.getOldState() + " -> " + e.getNewState() + "     "
+				+ ((e.getNewState() & Frame.MAXIMIZED_HORIZ) != 0 ? " HORIZ" : "")
+				+ ((e.getNewState() & Frame.MAXIMIZED_VERT) != 0 ? " VERT" : "")
+			);
+debug*/
+
 			frameStateChanged();
 			updateNativeTitleBarHeightAndHitTestSpots();
 		}
@@ -1185,7 +1263,7 @@ debug*/
 		//---- interface MouseListener ----
 
 		private Point dragOffset;
-		private boolean nativeMove;
+		private boolean linuxNativeMove;
 		private long lastSingleClickWhen;
 
 		@Override
@@ -1193,7 +1271,7 @@ debug*/
 			// on Linux, when using native library, the mouse clicked event
 			// is usually not sent and maximize/restore is done in mouse pressed event
 			// this check is here for the case that a mouse clicked event comes thru for some reason
-			if( SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) ) {
+			if( linuxNativeMove && SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) ) {
 				// see comment in mousePressed()
 				if( lastSingleClickWhen != 0 && (e.getWhen() - lastSingleClickWhen) <= getMultiClickInterval() ) {
 					lastSingleClickWhen = 0;
@@ -1231,7 +1309,7 @@ debug*/
 				return;
 
 			dragOffset = SwingUtilities.convertPoint( FlatTitlePane.this, e.getPoint(), window );
-			nativeMove = false;
+			linuxNativeMove = false;
 
 			// on Linux, move or maximize/restore window
 			if( SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) ) {
@@ -1251,7 +1329,7 @@ debug*/
 					case 1:
 						// move window via _NET_WM_MOVERESIZE message
 						e.consume();
-						nativeMove = FlatNativeLinuxLibrary.moveOrResizeWindow( window, e, FlatNativeLinuxLibrary.MOVE );
+						linuxNativeMove = FlatNativeLinuxLibrary.moveOrResizeWindow( window, e, FlatNativeLinuxLibrary.MOVE );
 						lastSingleClickWhen = e.getWhen();
 						break;
 
@@ -1281,7 +1359,7 @@ debug*/
 			if( window == null || dragOffset == null )
 				return; // should newer occur
 
-			if( nativeMove )
+			if( linuxNativeMove )
 				return;
 
 			if( !SwingUtilities.isLeftMouseButton( e ) )

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

@@ -20,23 +20,35 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Container;
 import java.awt.FocusTraversalPolicy;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.Insets;
+import java.awt.Rectangle;
 import java.awt.event.ContainerEvent;
 import java.awt.event.ContainerListener;
 import java.beans.PropertyChangeListener;
+import java.util.ArrayList;
+import java.util.Enumeration;
 import java.util.Map;
 import javax.swing.AbstractButton;
+import javax.swing.ButtonGroup;
+import javax.swing.ButtonModel;
+import javax.swing.DefaultButtonModel;
 import javax.swing.InputMap;
 import javax.swing.JComboBox;
 import javax.swing.JComponent;
+import javax.swing.JToolBar;
 import javax.swing.LayoutFocusTraversalPolicy;
+import javax.swing.RootPaneContainer;
 import javax.swing.UIManager;
 import javax.swing.border.Border;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicToolBarUI;
+import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.LoggingFacade;
+import com.formdev.flatlaf.util.UIScale;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JToolBar}.
@@ -58,6 +70,8 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * @uiDefault ToolBar.focusableButtons					boolean
  * @uiDefault ToolBar.arrowKeysOnlyNavigation			boolean
  * @uiDefault ToolBar.floatable							boolean
+ * @uiDefault ToolBar.hoverButtonGroupArc				int
+ * @uiDefault ToolBar.hoverButtonGroupBackground		Color
  *
  * <!-- FlatToolBarBorder -->
  *
@@ -72,6 +86,8 @@ public class FlatToolBarUI
 {
 	/** @since 1.4 */ @Styleable protected boolean focusableButtons;
 	/** @since 2 */ @Styleable protected boolean arrowKeysOnlyNavigation;
+	/** @since 3 */ @Styleable protected int hoverButtonGroupArc;
+	/** @since 3 */ @Styleable protected Color hoverButtonGroupBackground;
 
 	// for FlatToolBarBorder
 	@Styleable protected Insets borderMargins;
@@ -119,6 +135,8 @@ public class FlatToolBarUI
 
 		focusableButtons = UIManager.getBoolean( "ToolBar.focusableButtons" );
 		arrowKeysOnlyNavigation = UIManager.getBoolean( "ToolBar.arrowKeysOnlyNavigation" );
+		hoverButtonGroupArc = UIManager.getInt( "ToolBar.hoverButtonGroupArc" );
+		hoverButtonGroupBackground = UIManager.getColor( "ToolBar.hoverButtonGroupBackground" );
 
 		// floatable
 		if( !UIManager.getBoolean( "ToolBar.floatable" ) ) {
@@ -132,12 +150,21 @@ public class FlatToolBarUI
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		hoverButtonGroupBackground = null;
+
 		if( oldFloatable != null ) {
 			toolBar.setFloatable( oldFloatable );
 			oldFloatable = null;
 		}
 	}
 
+	@Override
+	protected RootPaneContainer createFloatingWindow( JToolBar toolbar ) {
+		RootPaneContainer floatingWindow = super.createFloatingWindow( toolbar );
+		floatingWindow.getRootPane().putClientProperty( FlatClientProperties.WINDOW_STYLE, FlatClientProperties.WINDOW_STYLE_SMALL );
+		return floatingWindow;
+	}
+
 	@Override
 	protected ContainerListener createToolBarContListener() {
 		return new ToolBarContListener() {
@@ -329,6 +356,99 @@ public class FlatToolBarUI
 		super.setOrientation( orientation );
 	}
 
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		super.paint( g, c );
+
+		paintButtonGroup( g );
+	}
+
+	/**@since 3 */
+	protected void paintButtonGroup( Graphics g ) {
+		if( hoverButtonGroupBackground == null )
+			return;
+
+		// find hovered button that is part of a button group
+		ButtonGroup group = null;
+		for( Component b : toolBar.getComponents() ) {
+			if( b instanceof AbstractButton && ((AbstractButton)b).getModel().isRollover() ) {
+				group = getButtonGroup( (AbstractButton) b );
+				if( group != null )
+					break;
+			}
+		}
+		if( group == null )
+			return;
+
+		// get bounds of buttons in group
+		ArrayList<Rectangle> rects = new ArrayList<>();
+		Enumeration<AbstractButton> e = group.getElements();
+		while( e.hasMoreElements() ) {
+			AbstractButton gb = e.nextElement();
+			if( gb.getParent() == toolBar )
+				rects.add( gb.getBounds() );
+		}
+
+		// sort button bounds
+		boolean horizontal = (toolBar.getOrientation() == JToolBar.HORIZONTAL);
+		rects.sort( (r1, r2) -> horizontal ? r1.x - r2.x : r1.y - r2.y );
+
+		Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+		g.setColor( FlatUIUtils.deriveColor( hoverButtonGroupBackground, toolBar.getBackground() ) );
+
+		// paint button group hover background
+		int maxSepWidth = UIScale.scale( 10 );
+		Rectangle gr = null;
+		for( Rectangle r : rects ) {
+			if( gr == null ) {
+				// first button
+				gr = r;
+			} else if( horizontal ? (gr.x + gr.width + maxSepWidth >= r.x) : (gr.y + gr.height + maxSepWidth >= r.y) ) {
+				// button joins previous button
+				gr = gr.union( r );
+			} else {
+				// paint group
+				FlatUIUtils.paintComponentBackground( (Graphics2D) g, gr.x, gr.y, gr.width, gr.height, 0, UIScale.scale( hoverButtonGroupArc ) );
+				gr = r;
+			}
+		}
+		if( gr != null )
+			FlatUIUtils.paintComponentBackground( (Graphics2D) g, gr.x, gr.y, gr.width, gr.height, 0, UIScale.scale( hoverButtonGroupArc ) );
+
+		FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+	}
+
+	/**@since 3 */
+	protected void repaintButtonGroup( AbstractButton b ) {
+		if( hoverButtonGroupBackground == null )
+			return;
+
+		ButtonGroup group = getButtonGroup( b );
+		if( group == null )
+			return;
+
+		// compute union bounds of all buttons in group (including separators)
+		Rectangle gr = null;
+		Enumeration<AbstractButton> e = group.getElements();
+		while( e.hasMoreElements() ) {
+			AbstractButton gb = e.nextElement();
+			Container parent = gb.getParent();
+			if( parent == toolBar )
+				gr = (gr != null) ? gr.union( gb.getBounds() ) : gb.getBounds();
+		}
+
+		// repaint button group
+		if( gr != null )
+			toolBar.repaint( gr );
+	}
+
+	private ButtonGroup getButtonGroup( AbstractButton b ) {
+		ButtonModel model = b.getModel();
+		return (model instanceof DefaultButtonModel)
+			? ((DefaultButtonModel)model).getGroup()
+			: null;
+	}
+
 	//---- class FlatToolBarFocusTraversalPolicy ------------------------------
 
 	/**

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

@@ -17,15 +17,19 @@
 package com.formdev.flatlaf.ui;
 
 import static com.formdev.flatlaf.FlatClientProperties.*;
-
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Rectangle;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
+import java.awt.geom.Rectangle2D;
 import java.beans.PropertyChangeListener;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.HashSet;
 import java.util.Map;
 import javax.swing.CellRendererPane;
 import javax.swing.Icon;
@@ -36,6 +40,7 @@ import javax.swing.LookAndFeel;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.JTree.DropLocation;
+import javax.swing.event.TreeSelectionListener;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicTreeUI;
 import javax.swing.tree.DefaultTreeCellRenderer;
@@ -96,8 +101,11 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Tree.selectionForeground				Color
  * @uiDefault Tree.selectionInactiveBackground		Color
  * @uiDefault Tree.selectionInactiveForeground		Color
+ * @uiDefault Tree.selectionInsets					Insets
+ * @uiDefault Tree.selectionArc						int
  * @uiDefault Tree.wideSelection					boolean
  * @uiDefault Tree.showCellFocusIndicator			boolean
+ * @uiDefault Tree.showDefaultIcons					boolean
  *
  * <!-- FlatTreeExpandedIcon -->
  *
@@ -132,8 +140,11 @@ public class FlatTreeUI
 	@Styleable protected Color selectionInactiveBackground;
 	@Styleable protected Color selectionInactiveForeground;
 	@Styleable protected Color selectionBorderColor;
+	/** @since 3 */ @Styleable protected Insets selectionInsets;
+	/** @since 3 */ @Styleable protected int selectionArc;
 	@Styleable protected boolean wideSelection;
 	@Styleable protected boolean showCellFocusIndicator;
+	/** @since 3 */ protected boolean showDefaultIcons;
 
 	// for icons
 	// (needs to be public because icon classes are in another package)
@@ -147,6 +158,11 @@ public class FlatTreeUI
 	// only used via styling (not in UI defaults, but has likewise client properties)
 	/** @since 2 */ @Styleable protected boolean paintSelection = true;
 
+	private Icon defaultLeafIcon;
+	private Icon defaultClosedIcon;
+	private Icon defaultOpenIcon;
+
+	private boolean paintLines;
 	private Color defaultCellNonSelectionBackground;
 	private Color defaultSelectionBackground;
 	private Color defaultSelectionForeground;
@@ -175,9 +191,17 @@ public class FlatTreeUI
 		selectionInactiveBackground = UIManager.getColor( "Tree.selectionInactiveBackground" );
 		selectionInactiveForeground = UIManager.getColor( "Tree.selectionInactiveForeground" );
 		selectionBorderColor = UIManager.getColor( "Tree.selectionBorderColor" );
+		selectionInsets = UIManager.getInsets( "Tree.selectionInsets" );
+		selectionArc = UIManager.getInt( "Tree.selectionArc" );
 		wideSelection = UIManager.getBoolean( "Tree.wideSelection" );
 		showCellFocusIndicator = UIManager.getBoolean( "Tree.showCellFocusIndicator" );
+		showDefaultIcons = UIManager.getBoolean( "Tree.showDefaultIcons" );
 
+		defaultLeafIcon = UIManager.getIcon( "Tree.leafIcon" );
+		defaultClosedIcon = UIManager.getIcon( "Tree.closedIcon" );
+		defaultOpenIcon = UIManager.getIcon( "Tree.openIcon" );
+
+		paintLines = UIManager.getBoolean( "Tree.paintLines" );
 		defaultCellNonSelectionBackground = UIManager.getColor( "Tree.textBackground" );
 		defaultSelectionBackground = selectionBackground;
 		defaultSelectionForeground = selectionForeground;
@@ -203,6 +227,10 @@ public class FlatTreeUI
 		selectionInactiveForeground = null;
 		selectionBorderColor = null;
 
+		defaultLeafIcon = null;
+		defaultClosedIcon = null;
+		defaultOpenIcon = null;
+
 		defaultCellNonSelectionBackground = null;
 		defaultSelectionBackground = null;
 		defaultSelectionForeground = null;
@@ -210,6 +238,24 @@ public class FlatTreeUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void updateRenderer() {
+		super.updateRenderer();
+
+		// remove default leaf/closed/opened icons
+		if( !showDefaultIcons && currentCellRenderer instanceof DefaultTreeCellRenderer ) {
+			DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) currentCellRenderer;
+			if( renderer.getLeafIcon() == defaultLeafIcon &&
+				renderer.getClosedIcon() == defaultClosedIcon &&
+				renderer.getOpenIcon() == defaultOpenIcon )
+			{
+				renderer.setLeafIcon( null );
+				renderer.setClosedIcon( null );
+				renderer.setOpenIcon( null );
+			}
+		}
+	}
+
 	@Override
 	protected MouseListener createMouseListener() {
 		return new BasicTreeUI.MouseHandler() {
@@ -281,6 +327,21 @@ public class FlatTreeUI
 						tree.revalidate();
 						tree.repaint();
 						break;
+
+					case "enabled":
+						// if default icons are not shown and the renderer is a subclass
+						// of DefaultTreeCellRenderer, then invalidate tree node sizes
+						// because the custom renderer may use an icon for enabled state
+						// but none for disabled state
+						if( !showDefaultIcons &&
+							currentCellRenderer instanceof DefaultTreeCellRenderer &&
+							currentCellRenderer.getClass() != DefaultTreeCellRenderer.class &&
+							treeState != null )
+						{
+							treeState.invalidateSizes();
+							updateSize();
+						}
+						break;
 				}
 			}
 		};
@@ -295,6 +356,34 @@ public class FlatTreeUI
 			tree.repaint( 0, r.y, tree.getWidth(), r.height );
 	}
 
+	@Override
+	protected TreeSelectionListener createTreeSelectionListener() {
+		TreeSelectionListener superListener = super.createTreeSelectionListener();
+		return e -> {
+			superListener.valueChanged( e );
+
+			// for united rounded selection, repaint parts of the rows that adjoin to the changed rows
+			TreePath[] changedPaths;
+			if( useUnitedRoundedSelection() &&
+				tree.getSelectionCount() > 1 &&
+				(changedPaths = e.getPaths()) != null )
+			{
+				if( changedPaths.length > 4 ) {
+					// same is done in BasicTreeUI.Handler.valueChanged()
+					tree.repaint();
+				} else {
+					int arc = (int) Math.ceil( UIScale.scale( selectionArc / 2f ) );
+
+					for( TreePath path : changedPaths ) {
+						Rectangle r = getPathBounds( tree, path );
+						if( r != null )
+							tree.repaint( r.x, r.y - arc, r.width, r.height + (arc * 2) );
+					}
+				}
+			}
+		};
+	}
+
 	@Override
 	public Rectangle getPathBounds( JTree tree, TreePath path ) {
 		Rectangle bounds = super.getPathBounds( tree, path );
@@ -331,6 +420,9 @@ public class FlatTreeUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
+		if( "rowHeight".equals( key ) && value instanceof Integer )
+			value = UIScale.scale( (Integer) value );
+
 		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, tree, key, value );
 	}
 
@@ -346,8 +438,127 @@ public class FlatTreeUI
 		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
 	}
 
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		if( treeState == null )
+			return;
+
+		// use clip bounds to limit painting to needed rows
+		Rectangle clipBounds = g.getClipBounds();
+		TreePath firstPath = getClosestPathForLocation( tree, 0, clipBounds.y );
+		Enumeration<TreePath> visiblePaths = treeState.getVisiblePathsFrom( firstPath );
+
+		if( visiblePaths != null ) {
+			Insets insets = tree.getInsets();
+
+			HashSet<TreePath> verticalLinePaths = paintLines ? new HashSet<>() : null;
+			ArrayList<Runnable> paintLinesLater = paintLines ? new ArrayList<>() : null;
+			ArrayList<Runnable> paintExpandControlsLater = paintLines ? new ArrayList<>() : null;
+
+			// add parents for later painting of vertical lines
+			if( paintLines ) {
+				for( TreePath path = firstPath.getParentPath(); path != null; path = path.getParentPath() )
+					verticalLinePaths.add( path );
+			}
+
+			Rectangle boundsBuffer = new Rectangle();
+			boolean rootVisible = isRootVisible();
+			int row = treeState.getRowForPath( firstPath );
+			boolean leftToRight = tree.getComponentOrientation().isLeftToRight();
+			int treeWidth = tree.getWidth();
+
+			// iterate over visible rows and paint rows, expand control and lines
+			while( visiblePaths.hasMoreElements() ) {
+				TreePath path = visiblePaths.nextElement();
+				if( path == null )
+					break;
+
+				// compute path bounds
+				Rectangle bounds = treeState.getBounds( path, boundsBuffer );
+				if( bounds == null )
+					break;
+
+				// add tree insets to path bounds
+				if( leftToRight )
+					bounds.x += insets.left;
+				else
+					bounds.x = treeWidth - insets.right - (bounds.x + bounds.width);
+				bounds.y += insets.top;
+
+				boolean isLeaf = treeModel.isLeaf( path.getLastPathComponent() );
+				boolean isExpanded = isLeaf ? false : treeState.getExpandedState( path );
+				boolean hasBeenExpanded = isLeaf ? false : tree.hasBeenExpanded( path );
+
+				// paint row (including selection)
+				paintRow( g, clipBounds, insets, bounds, path, row, isExpanded, hasBeenExpanded, isLeaf );
+
+				// collect lines for later painting
+				if( paintLines ) {
+					TreePath parentPath = path.getParentPath();
+
+					// add parent for later painting of vertical lines
+					if( parentPath != null )
+						verticalLinePaths.add( parentPath );
+
+					// paint horizontal line later (for using rendering hints)
+					if( parentPath != null || (rootVisible && row == 0) ) {
+						Rectangle bounds2 = new Rectangle( bounds );
+						int row2 = row;
+						paintLinesLater.add( () -> {
+							paintHorizontalPartOfLeg( g, clipBounds, insets, bounds2, path, row2, isExpanded, hasBeenExpanded, isLeaf );
+						} );
+					}
+				}
+
+				// paint expand control
+				if( shouldPaintExpandControl( path, row, isExpanded, hasBeenExpanded, isLeaf ) ) {
+					if( paintLines ) {
+						// need to paint after painting lines
+						Rectangle bounds2 = new Rectangle( bounds );
+						int row2 = row;
+						paintExpandControlsLater.add( () -> {
+							paintExpandControl( g, clipBounds, insets, bounds2, path, row2, isExpanded, hasBeenExpanded, isLeaf );
+						} );
+					} else
+						paintExpandControl( g, clipBounds, insets, bounds, path, row, isExpanded, hasBeenExpanded, isLeaf );
+				}
+
+				if( bounds.y + bounds.height >= clipBounds.y + clipBounds.height )
+					break;
+
+				row++;
+			}
+
+			if( paintLines ) {
+				// enable antialiasing for line painting
+				Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+
+				// paint horizontal lines
+				for( Runnable r : paintLinesLater )
+					r.run();
+
+				// paint vertical lines
+				g.setColor( Color.green );
+				for( TreePath path : verticalLinePaths )
+					paintVerticalPartOfLeg( g, clipBounds, insets, path );
+
+				// restore rendering hints
+				if( oldRenderingHints != null )
+					FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+
+				// paint expand controls
+				for( Runnable r : paintExpandControlsLater )
+					r.run();
+			}
+		}
+
+		paintDropLine( g );
+
+		rendererPane.removeAll();
+	}
+
 	/**
-	 * Same as super.paintRow(), but supports wide selection and uses
+	 * Similar to super.paintRow(), but supports wide selection and uses
 	 * inactive selection background/foreground if tree is not focused.
 	 */
 	@Override
@@ -367,7 +578,7 @@ public class FlatTreeUI
 			if( isSelected && isWideSelection() ) {
 				Color oldColor = g.getColor();
 				g.setColor( selectionInactiveBackground );
-				paintWideSelection( g, clipBounds, insets, bounds, path, row, isExpanded, hasBeenExpanded, isLeaf );
+				paintWideSelection( g, bounds, row );
 				g.setColor( oldColor );
 			}
 			return;
@@ -425,10 +636,10 @@ public class FlatTreeUI
 
 			if( isWideSelection() ) {
 				// wide selection
-				paintWideSelection( g, clipBounds, insets, bounds, path, row, isExpanded, hasBeenExpanded, isLeaf );
+				paintWideSelection( g, bounds, row );
 			} else {
 				// non-wide selection
-				paintCellBackground( g, rendererComponent, bounds );
+				paintCellBackground( g, rendererComponent, bounds, row, true );
 			}
 
 			// this is actually not necessary because renderer should always set color
@@ -442,7 +653,7 @@ public class FlatTreeUI
 				if( bg != null && !bg.equals( defaultCellNonSelectionBackground ) ) {
 					Color oldColor = g.getColor();
 					g.setColor( bg );
-					paintCellBackground( g, rendererComponent, bounds );
+					paintCellBackground( g, rendererComponent, bounds, row, false );
 					g.setColor( oldColor );
 				}
 			}
@@ -494,33 +705,72 @@ public class FlatTreeUI
 		return oldColor;
 	}
 
-	private void paintWideSelection( Graphics g, Rectangle clipBounds, Insets insets, Rectangle bounds,
-		TreePath path, int row, boolean isExpanded, boolean hasBeenExpanded, boolean isLeaf )
-	{
-		g.fillRect( 0, bounds.y, tree.getWidth(), bounds.height );
+	private void paintWideSelection( Graphics g, Rectangle bounds, int row ) {
+		float arcTop, arcBottom;
+		arcTop = arcBottom = UIScale.scale( selectionArc / 2f );
 
-		// paint expand/collapse icon
-		// (was already painted before, but painted over with wide selection)
-		if( shouldPaintExpandControl( path, row, isExpanded, hasBeenExpanded, isLeaf ) ) {
-			paintExpandControl( g, clipBounds, insets, bounds,
-				path, row, isExpanded, hasBeenExpanded, isLeaf );
+		if( useUnitedRoundedSelection() ) {
+			if( row > 0 && tree.isRowSelected( row - 1 ) )
+				arcTop = 0;
+			if( row < tree.getRowCount() - 1 && tree.isRowSelected( row + 1 ) )
+				arcBottom = 0;
 		}
+
+		FlatUIUtils.paintSelection( (Graphics2D) g, 0, bounds.y, tree.getWidth(), bounds.height,
+			UIScale.scale( selectionInsets ), arcTop, arcTop, arcBottom, arcBottom, 0 );
 	}
 
-	private void paintCellBackground( Graphics g, Component rendererComponent, Rectangle bounds ) {
+	private void paintCellBackground( Graphics g, Component rendererComponent, Rectangle bounds,
+		int row, boolean paintSelection )
+	{
 		int xOffset = 0;
 		int imageOffset = 0;
 
 		if( rendererComponent instanceof JLabel ) {
 			JLabel label = (JLabel) rendererComponent;
-			Icon icon = label.getIcon();
+			Icon icon = label.isEnabled() ? label.getIcon() : label.getDisabledIcon();
 			imageOffset = (icon != null && label.getText() != null)
 				? icon.getIconWidth() + Math.max( label.getIconTextGap() - 1, 0 )
 				: 0;
 			xOffset = label.getComponentOrientation().isLeftToRight() ? imageOffset : 0;
 		}
 
-		g.fillRect( bounds.x + xOffset, bounds.y, bounds.width - imageOffset, bounds.height );
+		if( paintSelection ) {
+			float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
+			arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
+
+			if( useUnitedRoundedSelection() ) {
+				if( row > 0 && tree.isRowSelected( row - 1 ) ) {
+					Rectangle r = getPathBounds( tree, tree.getPathForRow( row - 1 ) );
+					arcTopLeft = Math.min( arcTopLeft, r.x - bounds.x );
+					arcTopRight = Math.min( arcTopRight, (bounds.x + bounds.width) - (r.x + r.width) );
+				}
+				if( row < tree.getRowCount() - 1 && tree.isRowSelected( row + 1 ) ) {
+					Rectangle r = getPathBounds( tree, tree.getPathForRow( row + 1 ) );
+					arcBottomLeft = Math.min( arcBottomLeft, r.x - bounds.x );
+					arcBottomRight = Math.min( arcBottomRight, (bounds.x + bounds.width) - (r.x + r.width) );
+				}
+			}
+
+			FlatUIUtils.paintSelection( (Graphics2D) g, bounds.x + xOffset, bounds.y, bounds.width - imageOffset, bounds.height,
+				UIScale.scale( selectionInsets ), arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight, 0 );
+		} else
+			g.fillRect( bounds.x + xOffset, bounds.y, bounds.width - imageOffset, bounds.height );
+	}
+
+	private boolean useUnitedRoundedSelection() {
+		return selectionArc > 0 &&
+			(selectionInsets == null || (selectionInsets.top == 0 && selectionInsets.bottom == 0));
+	}
+
+	@Override
+	protected void paintVerticalLine( Graphics g, JComponent c, int x, int top, int bottom ) {
+		((Graphics2D)g).fill( new Rectangle2D.Float( x, top, UIScale.scale( 1f ), bottom - top ) );
+	}
+
+	@Override
+	protected void paintHorizontalLine( Graphics g, JComponent c, int y, int left, int right ) {
+		((Graphics2D)g).fill( new Rectangle2D.Float( left, y, right - left, UIScale.scale( 1f ) ) );
 	}
 
 	/**

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

@@ -39,12 +39,14 @@ import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
+import java.awt.geom.Point2D;
 import java.awt.geom.Rectangle2D;
 import java.awt.geom.RoundRectangle2D;
 import java.util.IdentityHashMap;
 import java.util.WeakHashMap;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
+import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JScrollPane;
 import javax.swing.JTable;
@@ -76,8 +78,6 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatUIUtils
 {
-	public static final boolean MAC_USE_QUARTZ = Boolean.getBoolean( "apple.awt.graphics.UseQuartz" );
-
 	private static boolean useSharedUIs = true;
 	private static final WeakHashMap<LookAndFeel, IdentityHashMap<Object, ComponentUI>> sharedUIinstances = new WeakHashMap<>();
 
@@ -167,6 +167,88 @@ public class FlatUIUtils
 		return defaultValue;
 	}
 
+	/** @since 3.2 */
+	public static Color getSubUIColor( String key, String subKey ) {
+		if( subKey != null ) {
+			Color value = UIManager.getColor( buildSubKey( key, subKey ) );
+			if( value != null )
+				return value;
+		}
+		return UIManager.getColor( key );
+	}
+
+	/** @since 3.2 */
+	public static boolean getSubUIBoolean( String key, String subKey, boolean defaultValue ) {
+		if( subKey != null ) {
+			Object value = UIManager.get( buildSubKey( key, subKey ) );
+			if( value instanceof Boolean )
+				return (Boolean) value;
+		}
+		return getUIBoolean( key, defaultValue );
+	}
+
+	/** @since 3.2 */
+	public static int getSubUIInt( String key, String subKey, int defaultValue ) {
+		if( subKey != null ) {
+			Object value = UIManager.get( buildSubKey( key, subKey ) );
+			if( value instanceof Integer )
+				return (Integer) value;
+		}
+		return getUIInt( key, defaultValue );
+	}
+
+	/** @since 3.2 */
+	public static Insets getSubUIInsets( String key, String subKey ) {
+		if( subKey != null ) {
+			Insets value = UIManager.getInsets( buildSubKey( key, subKey ) );
+			if( value != null )
+				return value;
+		}
+		return UIManager.getInsets( key );
+	}
+
+	/** @since 3.2 */
+	public static Dimension getSubUIDimension( String key, String subKey ) {
+		if( subKey != null ) {
+			Dimension value = UIManager.getDimension( buildSubKey( key, subKey ) );
+			if( value != null )
+				return value;
+		}
+		return UIManager.getDimension( key );
+	}
+
+	/** @since 3.2 */
+	public static Icon getSubUIIcon( String key, String subKey ) {
+		if( subKey != null ) {
+			Icon value = UIManager.getIcon( buildSubKey( key, subKey ) );
+			if( value != null )
+				return value;
+		}
+		return UIManager.getIcon( key );
+	}
+
+	/** @since 3.2 */
+	public static Font getSubUIFont( String key, String subKey ) {
+		if( subKey != null ) {
+			Font value = UIManager.getFont( buildSubKey( key, subKey ) );
+			if( value != null )
+				return value;
+		}
+		return UIManager.getFont( key );
+	}
+
+	/**
+	 * Inserts {@code subKey} at last dot in {@code key}.
+	 * <p>
+	 * E.g. {@code buildSubKey( "TitlePane.font", "small" )} returns {@code "TitlePane.small.font"}.
+	 */
+	private static String buildSubKey( String key, String subKey ) {
+		int dot = key.lastIndexOf( '.' );
+		return (dot >= 0)
+			? key.substring( 0, dot ) + '.' + subKey + '.' + key.substring( dot + 1 )
+			: key;
+	}
+
 	/** @since 1.1.2 */
 	public static boolean getBoolean( JComponent c, String systemPropertyKey,
 		String clientPropertyKey, String uiKey, boolean defaultValue )
@@ -201,6 +283,10 @@ public class FlatUIUtils
 		return (border instanceof UIResource) ? new NonUIResourceBorder( border ) : border;
 	}
 
+	static Border unwrapNonUIResourceBorder( Border border ) {
+		return (border instanceof NonUIResourceBorder) ? ((NonUIResourceBorder)border).delegate : border;
+	}
+
 	public static int minimumWidth( JComponent c, int minimumWidth ) {
 		return FlatClientProperties.clientPropertyInt( c, FlatClientProperties.MINIMUM_WIDTH, minimumWidth );
 	}
@@ -210,6 +296,9 @@ public class FlatUIUtils
 	}
 
 	public static boolean isCellEditor( Component c ) {
+		if( c == null )
+			return false;
+
 		// check whether used in cell editor (check 3 levels up)
 		Component c2 = c;
 		for( int i = 0; i <= 2 && c2 != null; i++ ) {
@@ -386,8 +475,7 @@ public class FlatUIUtils
 		};
 
 		g2.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
-		g2.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL,
-			MAC_USE_QUARTZ ? RenderingHints.VALUE_STROKE_PURE : RenderingHints.VALUE_STROKE_NORMALIZE );
+		g2.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE );
 
 		return oldRenderingHints;
 	}
@@ -440,9 +528,9 @@ public class FlatUIUtils
 	}
 
 	/**
-	 * Fills the background of a component with a round rectangle.
+	 * Fills the background of a component with a rounded rectangle.
 	 * <p>
-	 * The bounds of the painted round rectangle are
+	 * The bounds of the painted rounded rectangle are
 	 * {@code x + focusWidth, y + focusWidth, width - (focusWidth * 2), height - (focusWidth * 2)}.
 	 * The given arc diameter refers to the painted rectangle (and not to {@code x,y,width,height}).
 	 *
@@ -473,7 +561,7 @@ public class FlatUIUtils
 	 * <p>
 	 *
 	 * <strong>Background</strong>:
-	 * The bounds of the filled round rectangle are
+	 * The bounds of the filled rounded rectangle are
 	 * {@code [x + focusWidth, y + focusWidth, width - (focusWidth * 2), height - (focusWidth * 2)]}.
 	 * The focus border and the border may paint over the background.
 	 * <p>
@@ -671,12 +759,56 @@ public class FlatUIUtils
 		}
 	}
 
+	/**
+	 * Paints a selection.
+	 * <p>
+	 * The bounds of the painted selection (rounded) rectangle are
+	 * {@code x + insets.left, y + insets.top, width - insets.left - insets.right, height - insets.top - insets.bottom}.
+	 * The given arc radius refers to the painted rectangle (and not to {@code x,y,width,height}).
+	 *
+	 * @since 3
+	 */
+	public static void paintSelection( Graphics2D g, int x, int y, int width, int height, Insets insets,
+		float arcTopLeft, float arcTopRight, float arcBottomLeft, float arcBottomRight, int flags )
+	{
+		if( insets != null ) {
+			x += insets.left;
+			y += insets.top;
+			width -= insets.left + insets.right;
+			height -= insets.top + insets.bottom;
+		}
+
+		if( arcTopLeft > 0 || arcTopRight > 0 || arcBottomLeft > 0 || arcBottomRight > 0 ) {
+			double systemScaleFactor = UIScale.getSystemScaleFactor( g );
+			if( systemScaleFactor != 1 && systemScaleFactor != 2 ) {
+				// paint at scale 1x to avoid clipping on right and bottom edges at 125%, 150% or 175%
+				HiDPIUtils.paintAtScale1x( g, x, y, width, height,
+					(g2d, x2, y2, width2, height2, scaleFactor) -> {
+						paintRoundedSelectionImpl( g2d, x2, y2, width2, height2,
+							(float) (arcTopLeft * scaleFactor), (float) (arcTopRight * scaleFactor),
+							(float) (arcBottomLeft * scaleFactor), (float) (arcBottomRight * scaleFactor) );
+					} );
+			} else
+				paintRoundedSelectionImpl( g, x, y, width, height, arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight );
+
+		} else
+			g.fillRect( x, y, width, height );
+	}
+
+	private static void paintRoundedSelectionImpl( Graphics2D g, int x, int y, int width, int height,
+		float arcTopLeft, float arcTopRight, float arcBottomLeft, float arcBottomRight )
+	{
+		Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+		g.fill( FlatUIUtils.createRoundRectanglePath( x, y, width, height, arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight ) );
+		FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+	}
+
 	public static void paintGrip( Graphics g, int x, int y, int width, int height,
 		boolean horizontal, int dotCount, int dotSize, int gap, boolean centerPrecise )
 	{
 		dotSize = UIScale.scale( dotSize );
 		gap = UIScale.scale( gap );
-		int gripSize = (dotSize * dotCount) + ((gap * (dotCount - 1)));
+		int gripSize = (dotSize * dotCount) + (gap * (dotCount - 1));
 
 		// calculate grip position
 		float gx;
@@ -762,7 +894,7 @@ public class FlatUIUtils
 	}
 
 	/**
-	 * Creates a not-filled rounded rectangle shape and allows specifying the line width and the radius or each corner.
+	 * Creates a not-filled rounded rectangle shape and allows specifying the line width and the radius of each corner.
 	 */
 	public static Path2D createRoundRectangle( float x, float y, float width, float height,
 		float lineWidth, float arcTopLeft, float arcTopRight, float arcBottomLeft, float arcBottomRight )
@@ -801,7 +933,7 @@ public class FlatUIUtils
 		double ciBottomLeft = arcBottomLeft * ci;
 		double ciBottomRight = arcBottomRight * ci;
 
-		Path2D rect = new Path2D.Float();
+		Path2D rect = new Path2D.Float( Path2D.WIND_NON_ZERO, 16 );
 		rect.moveTo(  x2 - arcTopRight, y );
 		rect.curveTo( x2 - ciTopRight, y,
 					  x2, y + ciTopRight,
@@ -823,6 +955,27 @@ public class FlatUIUtils
 		return rect;
 	}
 
+	/**
+	 * Creates a rounded triangle shape for the given points and arc radius.
+	 *
+	 * @since 3
+	 */
+	public static Shape createRoundTrianglePath( float x1, float y1, float x2, float y2,
+		float x3, float y3, float arc )
+	{
+		double averageSideLength = (distance( x1,y1, x2,y2 ) + distance( x2,y2, x3,y3 ) + distance( x3,y3, x1,y1 )) / 3;
+		double t1 = (1 / averageSideLength) * arc;
+		double t2 = 1 - t1;
+
+		return createPath(
+			lerp( x3, x1, t2 ), lerp( y3, y1, t2 ),
+			QUAD_TO, x1, y1, lerp( x1, x2, t1 ), lerp( y1, y2, t1 ),
+			lerp( x1, x2, t2 ), lerp( y1, y2, t2 ),
+			QUAD_TO, x2, y2, lerp( x2, x3, t1 ), lerp( y2, y3, t1 ),
+			lerp( x2, x3, t2 ), lerp( y2, y3, t2 ),
+			QUAD_TO, x3, y3, lerp( x3, x1, t1 ), lerp( y3, y1, t1 ) );
+	}
+
 	/**
 	 * Paints a chevron or triangle arrow in the center of the given rectangle.
 	 *
@@ -835,13 +988,15 @@ public class FlatUIUtils
 	 *        {@link SwingConstants#WEST} or {@link SwingConstants#EAST})
 	 * @param chevron {@code true} for chevron arrow, {@code false} for triangle arrow
 	 * @param arrowSize the width of the painted arrow (for vertical direction) (will be scaled)
+	 * @param arrowThickness the thickness of the painted chevron arrow (will be scaled)
 	 * @param xOffset an offset added to the x coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
 	 * @param yOffset an offset added to the y coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
 	 *
-	 * @since 1.1
+	 * @since 3
 	 */
 	public static void paintArrow( Graphics2D g, int x, int y, int width, int height,
-		int direction, boolean chevron, int arrowSize, float xOffset, float yOffset )
+		int direction, boolean chevron, int arrowSize, float arrowThickness,
+		float xOffset, float yOffset )
 	{
 		// compute arrow width/height
 		// - make chevron arrows one pixel smaller because coordinates are based on center of pixels (0.5/0.5)
@@ -875,7 +1030,7 @@ debug*/
 		Shape arrowShape = createArrowShape( direction, chevron, aw, ah );
 		if( chevron ) {
 			Stroke oldStroke = g.getStroke();
-			g.setStroke( new BasicStroke( UIScale.scale( 1f ) ) );
+			g.setStroke( new BasicStroke( UIScale.scale( arrowThickness ) ) );
 			drawShapePure( g, arrowShape );
 			g.setStroke( oldStroke );
 		} else {
@@ -932,6 +1087,12 @@ debug*/
 	}
 debug*/
 
+	/** @since 3 */ public static final double MOVE_TO    = -1_000_000_000_001.;
+	/** @since 3 */ public static final double QUAD_TO    = -1_000_000_000_002.;
+	/** @since 3 */ public static final double CURVE_TO   = -1_000_000_000_003.;
+	/** @since 3 */ public static final double ROUNDED    = -1_000_000_000_004.;
+	/** @since 3 */ public static final double CLOSE_PATH = -1_000_000_000_005.;
+
 	/**
 	 * Creates a closed path for the given points.
 	 */
@@ -943,15 +1104,88 @@ debug*/
 	 * Creates an open or closed path for the given points.
 	 */
 	public static Path2D createPath( boolean close, double... points ) {
-		Path2D path = new Path2D.Float();
+		Path2D path = new Path2D.Float( Path2D.WIND_NON_ZERO, points.length / 2 + (close ? 1 : 0) );
 		path.moveTo( points[0], points[1] );
-		for( int i = 2; i < points.length; i += 2 )
-			path.lineTo( points[i], points[i + 1] );
+		for( int i = 2; i < points.length; ) {
+			double p = points[i];
+			if( p == MOVE_TO ) {
+				// move pointer to
+				//    params: x, y
+				path.moveTo( points[i + 1], points[i + 2] );
+				i += 3;
+			} else if( p == QUAD_TO ) {
+				// add quadratic curve
+				//    params: x1, y1, x2, y2
+				path.quadTo( points[i + 1], points[i + 2], points[i + 3], points[i + 4] );
+				i += 5;
+			} else if( p == CURVE_TO ) {
+				// add bezier curve
+				//    params: x1, y1, x2, y2, x3, y3
+				path.curveTo( points[i + 1], points[i + 2], points[i + 3], points[i + 4], points[i + 5], points[i + 6] );
+				i += 7;
+			} else if( p == ROUNDED ) {
+				// add rounded corner
+				//    params: x, y, arc
+				double x = points[i + 1];
+				double y = points[i + 2];
+				double arc = points[i + 3];
+
+				// index of next point
+				int ip2 = i + 4;
+				if( points[ip2] == QUAD_TO || points[ip2] == ROUNDED )
+					ip2++;
+
+				// previous and next points
+				Point2D p1 = path.getCurrentPoint();
+				double x1 = p1.getX();
+				double y1 = p1.getY();
+				double x2 = points[ip2];
+				double y2 = points[ip2 + 1];
+
+				double d1 = distance( x, y, x1, y1 );
+				double d2 = distance( x, y, x2, y2 );
+				double t1 = 1 - ((1 / d1) * arc);
+				double t2 = (1 / d2) * arc;
+
+				path.lineTo( lerp( x1, x, t1 ), lerp( y1, y, t1 ) );
+				path.quadTo( x, y, lerp( x, x2, t2 ), lerp( y, y2, t2 ) );
+
+				i += 4;
+			} else if( p == CLOSE_PATH ) {
+				// close path
+				//    params: -
+				path.closePath();
+				i += 1;
+			} else {
+				// add line to
+				//    params: x, y
+				path.lineTo( p, points[i + 1] );
+				i += 2;
+			}
+		}
 		if( close )
 			path.closePath();
 		return path;
 	}
 
+	/**
+	 * Calculates linear interpolation between two values.
+	 *
+	 * https://en.wikipedia.org/wiki/Linear_interpolation#Programming_language_support
+	 */
+	private static double lerp( double v1, double v2, double t ) {
+		return (v1 * (1 - t)) + (v2 * t);
+	}
+
+	/**
+	 * Calculates the distance between two points.
+	 */
+	private static double distance( double x1, double y1, double x2, double y2 ) {
+		double dx = x2 - x1;
+		double dy = y2 - y1;
+		return Math.sqrt( (dx * dx) + (dy * dy) );
+	}
+
 	/**
 	 * Draws the given shape with disabled stroke normalization.
 	 * The x/y coordinates of the shape are translated by a half pixel.

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

@@ -606,9 +606,10 @@ debug*/
 			if( resizeDir == S_RESIZE_CURSOR || resizeDir == SW_RESIZE_CURSOR || resizeDir == SE_RESIZE_CURSOR ) {
 				newBounds.height = (yOnScreen + dragBottomOffset) - newBounds.y;
 				if( limitToParentBounds() ) {
-					int parentHeight = getParentBounds().height;
-					if( newBounds.y + newBounds.height > parentHeight )
-						newBounds.height = parentHeight - newBounds.y;
+					Rectangle parentBounds = getParentBounds();
+					int parentBottomY = parentBounds.y + parentBounds.height;
+					if( newBounds.y + newBounds.height > parentBottomY )
+						newBounds.height = parentBottomY - newBounds.y;
 				}
 			}
 
@@ -624,9 +625,10 @@ debug*/
 			if( resizeDir == E_RESIZE_CURSOR || resizeDir == NE_RESIZE_CURSOR || resizeDir == SE_RESIZE_CURSOR ) {
 				newBounds.width = (xOnScreen + dragRightOffset) - newBounds.x;
 				if( limitToParentBounds() ) {
-					int parentWidth = getParentBounds().width;
-					if( newBounds.x + newBounds.width > parentWidth )
-						newBounds.width = parentWidth - newBounds.x;
+					Rectangle parentBounds = getParentBounds();
+					int parentRightX = parentBounds.x + parentBounds.width;
+					if( newBounds.x + newBounds.width > parentRightX )
+						newBounds.width = parentRightX - newBounds.x;
 				}
 			}
 

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

@@ -88,10 +88,6 @@ class FlatWindowsNativeWindowBorder
 		if( !SystemInfo.isWindows_10_orLater )
 			return null;
 
-		// requires x86 architecture
-		if( !SystemInfo.isX86 && !SystemInfo.isX86_64 )
-			return null;
-
 		// check whether native library was successfully loaded
 		if( !FlatNativeLibrary.isLoaded() )
 			return null;

flatlaf-core/src/main/java/com/formdev/flatlaf/util/ColorFunctions.java

@@ -105,6 +105,19 @@ public class ColorFunctions
 		return HSLColor.toRGB( hsl[0], hsl[1], hsl[2], alpha );
 	}
 
+	/**
+	 * Set the opacity (alpha) of a color.
+	 *
+	 * @param color base color
+	 * @param amount the amount (in range 0-1) of the new opacity
+	 * @return new color
+	 * @since 3
+	 */
+	public static Color fade( Color color, float amount ) {
+		int newAlpha = Math.round( 255 * amount );
+		return new Color( (color.getRGB() & 0xffffff) | (newAlpha << 24), true );
+	}
+
 	/**
 	 * Returns a color that is a mixture of two colors.
 	 * <p>