macOS: hide popups when window is resized (issue #1082)

https://www.formdev.com/flatlaf/typography/#text_styles

Theme Editor: added to preview

.editorconfig

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

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

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

.github/workflows/ci.yml

@@ -14,13 +14,13 @@ on:
       - '.*'
       - '**/.settings/**'
       - 'flatlaf-core/svg/**'
+      - 'flatlaf-natives/**'
       - 'flatlaf-testing/dumps/**'
       - 'flatlaf-testing/misc/**'
       - 'images/**'
 
 jobs:
   build:
-    name: build (11)
     runs-on: ubuntu-latest
 
     steps:
@@ -28,20 +28,44 @@ jobs:
 
       - uses: gradle/actions/wrapper-validation@v4
 
-      - name: Setup Java 11
+      - name: Setup Java 21
         uses: actions/setup-java@v4
         with:
-          java-version: 11
+          java-version: 21
           distribution: temurin  # pre-installed on ubuntu-latest
-          cache: gradle
 
-      - name: Check with Error Prone
-        run: ./gradlew errorprone clean
+      - name: Cache Gradle
+        uses: ./.github/actions/cache-gradle
 
-      - name: Build with Gradle
+
+        # test against
+        # - Java 8 (minimum requirement)
+        # - Java LTS versions (11, 17, ...)
+        # - latest Java version(s)
+
+      - name: Build with Java 11 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=11
+
+      - name: Build with Java 17 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=17
+
+      - name: Build with Java 21 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=21
+
+      - name: Build with Java 25 LTS
+        if: github.repository == 'JFormDesigner/FlatLaf'
+        run: ./gradlew build clean -Dtoolchain=25
+
+
+        # build with Java 8 for snapshot
+
+      - name: Build with Java 8
         run: ./gradlew build
 
-      - name: Upload artifacts
+      - name: Upload artifacts to GitHub Actions
         uses: actions/upload-artifact@v4
         with:
           name: FlatLaf-build-artifacts
@@ -52,59 +76,11 @@ jobs:
             !**/*-sources.jar
 
 
-  build-on:
-    runs-on: ubuntu-latest
-    needs: build
-    if: github.repository == 'JFormDesigner/FlatLaf'
-
-    strategy:
-      matrix:
-        # test against
-        # - Java 8 (minimum requirement)
-        # - Java LTS versions (11, 17, ...)
-        # - latest Java version(s)
-        java:
-          - 8
-          - 17  # LTS
-          - 21  # LTS
-        toolchain: [""]
-        include:
-          - java: 21
-            toolchain: 25  # LTS
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Java ${{ matrix.java }}
-        uses: actions/setup-java@v4
-        with:
-          java-version: ${{ matrix.java }}
-          distribution: temurin  # Java 8, 11, 17 and 21 are pre-installed on ubuntu-latest
-          cache: gradle
-
-      - name: Build with Gradle
-        run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
-
-
-  snapshot:
-    runs-on: ubuntu-latest
-    needs: build-on
-    if: |
-      github.event_name == 'push' &&
-      (github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' )) &&
-      github.repository == 'JFormDesigner/FlatLaf'
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Java 11
-        uses: actions/setup-java@v4
-        with:
-          java-version: 11
-          distribution: temurin  # pre-installed on ubuntu-latest
-          cache: gradle
-
       - name: Publish snapshot to Sonatype Central
+        if: |
+          github.repository == 'JFormDesigner/FlatLaf' &&
+          github.event_name == 'push' &&
+          (github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' ))
         run: ./gradlew publish -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
         env:
           SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
@@ -113,7 +89,7 @@ jobs:
 
   release:
     runs-on: ubuntu-latest
-    needs: build-on
+    needs: build
     if: |
       github.event_name == 'push' &&
       startsWith( github.ref, 'refs/tags/' ) &&
@@ -122,14 +98,16 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup Java 11
+      - name: Setup Java 21
         uses: actions/setup-java@v4
         with:
-          java-version: 11
+          java-version: 21
           distribution: temurin  # pre-installed on ubuntu-latest
-          cache: gradle
 
-      - name: Release a new stable version to Maven Central
+      - name: Cache Gradle
+        uses: ./.github/actions/cache-gradle
+
+      - name: Release a new stable version to Maven Central and build demo and theme editor
         run: ./gradlew publishToSonatype closeSonatypeStagingRepository :flatlaf-demo:build :flatlaf-theme-editor:build -PskipFonts -Prelease -Dorg.gradle.parallel=false
         env:
           SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}

.github/workflows/error-prone.yml

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

.github/workflows/fonts.yml

@@ -34,12 +34,14 @@ jobs:
         steps:
             - uses: actions/checkout@v4
 
-            - name: Setup Java 11
+            - name: Setup Java 21
               uses: actions/setup-java@v4
               with:
-                  java-version: 11
+                  java-version: 21
                   distribution: temurin  # pre-installed on ubuntu-latest
-                  cache: gradle
+
+            - name: Cache Gradle
+              uses: ./.github/actions/cache-gradle
 
             - name: Build with Gradle
               run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:build

.github/workflows/natives.yml

@@ -33,30 +33,99 @@ jobs:
 
             - uses: gradle/actions/wrapper-validation@v4
 
-            - name: install libxt-dev
+            - name: apt update (Linux)
               if: matrix.os == 'ubuntu-latest' || matrix.os == 'ubuntu-24.04-arm'
-              run: sudo apt install libxt-dev
+              run: sudo apt-get update
 
-            - name: install g++-aarch64-linux-gnu
-              if: matrix.os == 'ubuntu-latest'
-              run: sudo apt install g++-aarch64-linux-gnu
+            - name: install libxt-dev and libgtk-3-dev (Linux)
+              if: matrix.os == 'ubuntu-latest' || matrix.os == 'ubuntu-24.04-arm'
+              run: sudo apt-get install libxt-dev libgtk-3-dev
 
-            - name: Setup Java 11
+#           - name: Download libgtk-3.so for arm64 (Linux)
+#             if: matrix.os == 'ubuntu-latest'
+#             working-directory: flatlaf-natives/flatlaf-natives-linux/lib/aarch64
+#             run: |
+#               pwd
+#               ls -l /usr/lib/x86_64-linux-gnu/libgtk*
+#               wget --no-verbose https://ports.ubuntu.com/pool/main/g/gtk%2b3.0/libgtk-3-0_3.24.18-1ubuntu1_arm64.deb
+#               ls -l
+#               ar -x libgtk-3-0_3.24.18-1ubuntu1_arm64.deb data.tar.xz
+#               tar -xvf data.tar.xz --wildcards --to-stdout "./usr/lib/aarch64-linux-gnu/libgtk-3.so.0.*" > libgtk-3.so
+#               rm libgtk-3-0_3.24.18-1ubuntu1_arm64.deb data.tar.xz
+#               ls -l
+
+#           - name: install g++-aarch64-linux-gnu (Linux)
+#             if: matrix.os == 'ubuntu-latest'
+#             run: sudo apt-get install g++-aarch64-linux-gnu
+
+            - name: Setup Java 21
               uses: actions/setup-java@v4
               with:
-                  java-version: 11
+                  java-version: 21
                   distribution: temurin
-                  cache: gradle
+
+            - name: Cache Gradle
+              uses: ./.github/actions/cache-gradle
 
             - name: Build with Gradle
               # --no-daemon is necessary on Windows otherwise caching Gradle would fail with:
               #   tar.exe: Couldn't open ~/.gradle/caches/modules-2/modules-2.lock: Permission denied
               run: ./gradlew build-natives --no-daemon
 
+            - name: Sign Windows DLLs
+              if: matrix.os == 'windows-latest'
+              uses: skymatic/code-sign-action@v3
+              with:
+                certificate: '${{ secrets.CODE_SIGN_CERT_BASE64 }}'
+                password: '${{ secrets.CODE_SIGN_CERT_PASSWORD }}'
+                certificatesha1: '${{ secrets.CODE_SIGN_CERT_SHA1 }}'
+                folder: 'flatlaf-core/src/main/resources/com/formdev/flatlaf/natives'
+
+            - name: Sign macOS natives
+              if: matrix.os == 'DISABLED--macos-latest'
+              env:
+                CERT_BASE64: ${{ secrets.CODE_SIGN_CERT_BASE64 }}
+                CERT_PASSWORD: ${{ secrets.CODE_SIGN_CERT_PASSWORD }}
+                CERT_IDENTITY: ${{ secrets.CODE_SIGN_CERT_IDENTITY }}
+              run: |
+                # https://docs.github.com/en/actions/use-cases-and-examples/deploying/installing-an-apple-certificate-on-macos-runners-for-xcode-development
+                # create variables
+                CERTIFICATE_PATH=$RUNNER_TEMP/cert.p12
+                KEYCHAIN_PATH=$RUNNER_TEMP/signing.keychain-db
+                KEYCHAIN_PASSWORD=$CERT_PASSWORD
+                # decode certificate
+                printenv CERT_BASE64 | base64 --decode > $CERTIFICATE_PATH
+                # create temporary keychain
+                security create-keychain -p "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
+                security set-keychain-settings -lut 21600 $KEYCHAIN_PATH
+                security unlock-keychain -p "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
+                # import certificate to keychain
+                security import $CERTIFICATE_PATH -P "$CERT_PASSWORD" -A -t cert -f pkcs12 -k $KEYCHAIN_PATH
+                # set partition list (required for codesign)
+                security set-key-partition-list -S apple-tool:,apple: -k "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
+                # add keychain to keychain search list
+                security list-keychains -d user -s $KEYCHAIN_PATH
+                # sign code
+                codesign --sign "$CERT_IDENTITY" --force --verbose=4 --timestamp \
+                  flatlaf-core/src/main/resources/com/formdev/flatlaf/natives/libflatlaf-macos-*.dylib
+                codesign --display --verbose=4 flatlaf-core/src/main/resources/com/formdev/flatlaf/natives/libflatlaf-macos-*.dylib
+                # cleanup
+                security delete-keychain $KEYCHAIN_PATH
+
+            - name: Set artifacts pattern
+              shell: bash
+              run: |
+                case ${{ matrix.os }} in
+                    windows-latest)    echo "artifactPattern=flatlaf-windows-*.dll"      >> $GITHUB_ENV ;;
+                    macos-latest)      echo "artifactPattern=libflatlaf-macos-*.dylib"   >> $GITHUB_ENV ;;
+                    ubuntu-latest)     echo "artifactPattern=libflatlaf-linux-x86_64.so" >> $GITHUB_ENV ;;
+                    ubuntu-24.04-arm)  echo "artifactPattern=libflatlaf-linux-arm64.so"  >> $GITHUB_ENV ;;
+                esac
+
             - name: Upload artifacts
               uses: actions/upload-artifact@v4
               with:
                   name: FlatLaf-natives-build-artifacts-${{ matrix.os }}
                   path: |
-                      flatlaf-core/src/main/resources/com/formdev/flatlaf/natives
+                      flatlaf-core/src/main/resources/com/formdev/flatlaf/natives/${{ env.artifactPattern }}
                       flatlaf-natives/flatlaf-natives-*/build

.github/workflows/pr-snapshots.yml

@@ -21,12 +21,14 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup Java 11
+      - name: Setup Java 21
         uses: actions/setup-java@v4
         with:
-          java-version: 11
+          java-version: 21
           distribution: temurin  # pre-installed on ubuntu-latest
-          cache: gradle
+
+      - name: Cache Gradle
+        uses: ./.github/actions/cache-gradle
 
       - name: Publish PR snapshot to Sonatype Central
         run: >

CHANGELOG.md

@@ -1,6 +1,62 @@
 FlatLaf Change Log
 ==================
 
+## 3.7.1-SNAPSHOT
+
+- ComboBox: Added UI property `ComboBox.buttonFocusedEditableBackground`. (issue
+  #1068)
+- Dialog: Some client properties (e.g. `JRootPane.titleBarShowTitle`) did not
+  work before the dialog was made visible. (issue #1081)
+- Popup: Fixed scrolling popup painting issue on Windows 10 when a glass pane is
+  visible and frame is maximized. (issue #1071)
+- Slider: Styling `thumbSize` or `focusWidth` did not update slider size/layout.
+  (PR #1074)
+- ToolBar: Grip disappeared when switching between Look and Feels. (issue #1075)
+- macOS: Popups (menus and combobox lists) were not always hidden when window is
+  resized. (issue #1082)
+- Extras:
+  - UI defaults inspector: Fixed NPE if color of `FlatLineBorder` is null. Also
+    use `FlatLineBorder` line color as cell background color in "Value" column.
+    (PR #1080)
+  - `FlatDesktop`: Avoid unnecessary logging if desktop is not supported (e.g.
+    on NixOS with Plasma/KDE desktop).
+
+
+## 3.7
+
+#### New features and improvements
+
+- System File Chooser allows using **operating system file dialogs** in Java
+  Swing applications. (PR #988)
+- Zooming API. (PR #1051)
+- Icons:
+  - Support scaling Laf icons (checkbox, radiobutton, etc). (issue #1061)
+  - Scale checkbox and radiobutton icons when using
+    [text styles](https://www.formdev.com/flatlaf/typography/#text_styles)
+    `large`, `medium`, `small` and `mini`.
+- TabbedPane: Added icon-only tab mode, which shows tab icons but hides tab
+  titles. Tab titles are used in "Show Hidden Tabs" popup menu. (set client
+  property `JTabbedPane.tabWidthMode` to `"iconOnly"`)
+- TabbedPane: In scroll tab layout, propagate mouse wheel events to ancestors.
+  This allows mouse wheel scrolling if JTabbedPane is inside a JScrollPane. (PR
+  #1030)
+
+#### Fixed bugs
+
+- CheckBox and RadioButton: Fixed styling of custom icon. Also fixed focus width
+  (and preferred size) if using custom icon. (PR #1060)
+- TabbedPane: In "Show Hidden Tabs" popup menu, do not show text "x. Tab" if tab
+  has icon but no title. (issue #1062)
+- TextField: Fixed wrong leading/trailing icon placement if border is set to
+  `null`. (issue #1047)
+- Extras: UI defaults inspector: Exclude inspector window from being blocked by
+  modal dialogs. (issue #1048)
+- JideButton, JideToggleButton, JideSplitButton and JideToggleSplitButton: Paint
+  border in button style `TOOLBAR_STYLE` if in selected state. (issue #1045)
+- IntelliJ Themes: Fixed problem when using theme instance more than once when
+  switching to that theme. (issue #990)
+
+
 ## 3.6.2
 
 #### New features and improvements

README.md

@@ -76,10 +76,16 @@ Otherwise, download `flatlaf-<version>.jar` here:
 
 [![Maven Central](https://img.shields.io/maven-central/v/com.formdev/flatlaf?style=flat-square)](https://central.sonatype.com/artifact/com.formdev/flatlaf)
 
-See also
-[Native Libraries distribution](https://www.formdev.com/flatlaf/native-libraries/)
-for instructions on how to redistribute FlatLaf native libraries with your
-application.
+- See
+  [Native Libraries distribution](https://www.formdev.com/flatlaf/native-libraries/)
+  for instructions on how to redistribute FlatLaf native libraries with your
+  application.
+- If repackaging FlatLaf (and other) JARs into a single fat/uber JAR:
+  - add `Multi-Release: true` to `META-INF/MANIFEST.MF`
+  - keep `META-INF/versions/` and `META-INF/services/` directories
+  - merge content of equally named files in `META-INF/services/`
+- If using obfuscation/minimizing/shrinking tools (e.g. **ProGuard** or
+  **Shadow**), exclude package `com.formdev.flatlaf` and all sub-packages.
 
 
 ### Snapshots

build.gradle.kts

@@ -14,8 +14,12 @@
  * limitations under the License.
  */
 
+import io.github.gradlenexus.publishplugin.CloseNexusStagingRepository
 import net.ltgt.gradle.errorprone.errorprone
+import org.gradle.kotlin.dsl.withType
 
+
+// initialize version
 group = "com.formdev"
 version = property( if( hasProperty( "release" ) ) "flatlaf.releaseVersion" else "flatlaf.developmentVersion" ) as String
 
@@ -24,18 +28,16 @@ val pullRequestNumber = findProperty( "github.event.pull_request.number" )
 if( pullRequestNumber != null )
 	version = "PR-${pullRequestNumber}-SNAPSHOT"
 
-
-allprojects {
+// apply version to all subprojects
+subprojects {
 	version = rootProject.version
-
-	repositories {
-		mavenCentral()
-	}
 }
 
-// check required Java version
-if( JavaVersion.current() < JavaVersion.VERSION_1_8 )
-	throw RuntimeException( "Java 8 or later required (running ${System.getProperty( "java.version" )})" )
+
+// initialize toolchain version (default is Java 8)
+val toolchainJavaVersion: String by extra {
+	System.getProperty( "toolchain", "8" )
+}
 
 // log version, Gradle and Java versions
 println()
@@ -43,9 +45,7 @@ println( "----------------------------------------------------------------------
 println( "FlatLaf Version: ${version}" )
 println( "Gradle ${gradle.gradleVersion} at ${gradle.gradleHomeDir}" )
 println( "Java ${System.getProperty( "java.version" )}" )
-val toolchainJavaVersion = System.getProperty( "toolchain" )
-if( !toolchainJavaVersion.isNullOrEmpty() )
-	println( "Java toolchain ${toolchainJavaVersion}" )
+println( "Java toolchain ${toolchainJavaVersion}" )
 println()
 
 
@@ -55,6 +55,10 @@ plugins {
 }
 
 allprojects {
+	repositories {
+		mavenCentral()
+	}
+
 	tasks {
 		withType<JavaCompile>().configureEach {
 			sourceCompatibility = "1.8"
@@ -78,6 +82,10 @@ allprojects {
 			}
 		}
 
+		withType<AbstractArchiveTask>().configureEach {
+			isPreserveFileTimestamps = true
+		}
+
 		withType<Javadoc>().configureEach {
 			options {
 				this as StandardJavadocDocletOptions
@@ -90,6 +98,23 @@ allprojects {
 				links( "https://docs.oracle.com/en/java/javase/11/docs/api/" )
 			}
 			isFailOnError = false
+
+			// use Java 25 to generate javadoc
+			val javaToolchains = (project as ExtensionAware).extensions.getByName("javaToolchains") as JavaToolchainService
+			javadocTool.set( javaToolchains.javadocToolFor {
+				languageVersion.set( JavaLanguageVersion.of( 25 ) )
+			} )
+		}
+
+		// mark some publishing related tasks as not compatible with configuration cache
+		withType<Sign>().configureEach {
+			notCompatibleWithConfigurationCache( "not compatible" )
+		}
+		withType<PublishToMavenRepository>().configureEach {
+			notCompatibleWithConfigurationCache( "not compatible" )
+		}
+		withType<CloseNexusStagingRepository>().configureEach {
+			notCompatibleWithConfigurationCache( "not compatible" )
 		}
 	}
 
@@ -141,6 +166,15 @@ allprojects {
 						)
 					}
 				}
+
+				// Error Prone requires at lease Java 11
+				val java = (project as ExtensionAware).extensions.getByName("java") as JavaPluginExtension
+				val javaToolchains = (project as ExtensionAware).extensions.getByName("javaToolchains") as JavaToolchainService
+				if( java.toolchain.languageVersion.get().asInt() < 11 ) {
+					javaCompiler.set( javaToolchains.compilerFor {
+						languageVersion.set( JavaLanguageVersion.of( 11 ) )
+					} )
+				}
 			}
 		}
 	}

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

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

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

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

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

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

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

@@ -15,7 +15,7 @@
  */
 
 
-open class NativeArtifact( val fileName: String, val classifier: String, val type: String ) {}
+open class NativeArtifact( val fileName: String, val classifier: String, val extension: String ) {}
 
 open class PublishExtension {
 	var artifactId: String? = null
@@ -77,35 +77,14 @@ publishing {
 
 			afterEvaluate {
 				extension.nativeArtifacts?.forEach {
-					artifact( artifacts.add( "archives", file( it.fileName ) ) {
+					artifact( file( it.fileName ) ) {
 						classifier = it.classifier
-						type = it.type
-					} )
+						extension = it.extension
+					}
 				}
 			}
 		}
 	}
-
-/*
-	repositories {
-		maven {
-			name = "MavenCentral"
-
-			val releasesRepoUrl = "https://ossrh-staging-api.central.sonatype.com/service/local/staging/deploy/maven2/"
-			val snapshotsRepoUrl = "https://central.sonatype.com/repository/maven-snapshots/"
-			url = uri( if( rootProject.hasProperty( "release" ) ) releasesRepoUrl else snapshotsRepoUrl )
-
-			credentials {
-				// get from gradle.properties
-				val sonatypeUsername: String? by project
-				val sonatypePassword: String? by project
-
-				username = System.getenv( "SONATYPE_USERNAME" ) ?: sonatypeUsername
-				password = System.getenv( "SONATYPE_PASSWORD" ) ?: sonatypePassword
-			}
-		}
-	}
-*/
 }
 
 signing {
@@ -125,10 +104,22 @@ tasks.withType<Sign>().configureEach {
 	onlyIf { rootProject.hasProperty( "release" ) }
 }
 
-// check whether parallel build is enabled
-tasks.withType<AbstractPublishToMaven>().configureEach {
-	doFirst {
-		if( System.getProperty( "org.gradle.parallel" ) == "true" )
-			throw RuntimeException( "Publishing does not work correctly with enabled parallel build. Disable parallel build with VM option '-Dorg.gradle.parallel=false'." )
+tasks {
+	// check whether parallel build is enabled
+	withType<AbstractPublishToMaven>().configureEach {
+		doFirst {
+			if( System.getProperty( "org.gradle.parallel" ) == "true" )
+				throw RuntimeException( "Publishing does not work correctly with enabled parallel build. Disable parallel build with VM option '-Dorg.gradle.parallel=false'." )
+		}
+	}
+
+	register( "publishToSonatypeAndCloseStagingRepo" ) {
+		group = "publishing"
+		description = "Publish to Sonatype Maven Central and close staging repository"
+
+		dependsOn(
+			"publishToSonatype",
+			":closeSonatypeStagingRepository"
+		)
 	}
 }

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

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

flatlaf-core/build.gradle.kts

@@ -90,7 +90,7 @@ tasks {
 		useJUnitPlatform()
 		testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
 
-		if( JavaVersion.current() >= JavaVersion.VERSION_1_9 )
+		if( java.toolchain.languageVersion.get().asInt() >= 9 )
 			jvmArgs( listOf( "--add-opens", "java.desktop/javax.swing.plaf.basic=ALL-UNNAMED" ) )
 	}
 
@@ -98,21 +98,31 @@ tasks {
 		group = "verification"
 		dependsOn( "jar" )
 
+		// necessary for configuration cache
+		val classpath = sigtest.asPath
+		val signatureFile = "${project.name}-sigtest.txt"
+		val jarPath = jar.get().outputs.files.asPath
+		val version = version
+
 		doLast {
 			ant.withGroovyBuilder {
 				"taskdef"(
 					"name" to "sigtest",
 					"classname" to "org.netbeans.apitest.Sigtest",
-					"classpath" to sigtest.asPath )
+					"classpath" to classpath )
 
 				"sigtest"(
 					"action" to "generate",
-					"fileName" to "${project.name}-sigtest.txt",
-					"classpath" to jar.get().outputs.files.asPath,
+					"fileName" to signatureFile,
+					"classpath" to jarPath,
 					"packages" to "com.formdev.flatlaf,com.formdev.flatlaf.themes,com.formdev.flatlaf.util",
 					"version" to version,
 					"release" to "1.8", // Java version
 					"failonerror" to "true" )
+
+				"fixcrlf"(
+					"file" to signatureFile,
+					"eol" to "lf" )
 			}
 		}
 	}
@@ -121,17 +131,23 @@ tasks {
 		group = "verification"
 		dependsOn( "jar" )
 
+		// necessary for configuration cache
+		val classpath = sigtest.asPath
+		val signatureFile = "${project.name}-sigtest.txt"
+		val jarPath = jar.get().outputs.files.asPath
+		val version = version
+
 		doLast {
 			ant.withGroovyBuilder {
 				"taskdef"(
 					"name" to "sigtest",
 					"classname" to "org.netbeans.apitest.Sigtest",
-					"classpath" to sigtest.asPath )
+					"classpath" to classpath )
 
 				"sigtest"(
 					"action" to "check",
-					"fileName" to "${project.name}-sigtest.txt",
-					"classpath" to jar.get().outputs.files.asPath,
+					"fileName" to signatureFile,
+					"classpath" to jarPath,
 					"packages" to "com.formdev.flatlaf,com.formdev.flatlaf.util",
 					"version" to version,
 					"release" to "1.8", // Java version

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 3.6.2
+#Version 3.7
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -87,6 +87,7 @@ fld public final static java.lang.String TABBED_PANE_TAB_TYPE_UNDERLINED = "unde
 fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE = "JTabbedPane.tabWidthMode"
 fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE_COMPACT = "compact"
 fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE_EQUAL = "equal"
+fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY = "iconOnly"
 fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE_PREFERRED = "preferred"
 fld public final static java.lang.String TABBED_PANE_TRAILING_COMPONENT = "JTabbedPane.trailingComponent"
 fld public final static java.lang.String TAB_BUTTON_SELECTED_BACKGROUND = "JToggleButton.tab.selectedBackground"
@@ -307,6 +308,7 @@ fld public final static java.lang.String USE_JETBRAINS_CUSTOM_DECORATIONS = "fla
 fld public final static java.lang.String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary"
 fld public final static java.lang.String USE_ROUNDED_POPUP_BORDER = "flatlaf.useRoundedPopupBorder"
 fld public final static java.lang.String USE_SUB_MENU_SAFE_TRIANGLE = "flatlaf.useSubMenuSafeTriangle"
+fld public final static java.lang.String USE_SYSTEM_FILE_CHOOSER = "flatlaf.useSystemFileChooser"
 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"
@@ -770,6 +772,112 @@ cons public init()
 meth public static <%0 extends java.awt.Component> {%%0} getComponentByName(java.awt.Container,java.lang.String)
 supr java.lang.Object
 
+CLSS public com.formdev.flatlaf.util.SystemFileChooser
+cons public init()
+cons public init(java.io.File)
+cons public init(java.lang.String)
+fld public final static int APPROVE_OPTION = 0
+fld public final static int CANCEL_OPTION = 1
+fld public final static int DIRECTORIES_ONLY = 1
+fld public final static int FILES_ONLY = 0
+fld public final static int OPEN_DIALOG = 0
+fld public final static int SAVE_DIALOG = 1
+fld public final static java.lang.String LINUX_OPTIONS_CLEAR = "linux.optionsClear"
+fld public final static java.lang.String LINUX_OPTIONS_SET = "linux.optionsSet"
+fld public final static java.lang.String MAC_FILTER_FIELD_LABEL = "mac.filterFieldLabel"
+fld public final static java.lang.String MAC_MESSAGE = "mac.message"
+fld public final static java.lang.String MAC_NAME_FIELD_LABEL = "mac.nameFieldLabel"
+fld public final static java.lang.String MAC_OPTIONS_CLEAR = "mac.optionsClear"
+fld public final static java.lang.String MAC_OPTIONS_SET = "mac.optionsSet"
+fld public final static java.lang.String MAC_TREATS_FILE_PACKAGES_AS_DIRECTORIES = "mac.treatsFilePackagesAsDirectories"
+fld public final static java.lang.String WINDOWS_DEFAULT_EXTENSION = "windows.defaultExtension"
+fld public final static java.lang.String WINDOWS_DEFAULT_FOLDER = "windows.defaultFolder"
+fld public final static java.lang.String WINDOWS_FILE_NAME_LABEL = "windows.fileNameLabel"
+fld public final static java.lang.String WINDOWS_OPTIONS_CLEAR = "windows.optionsClear"
+fld public final static java.lang.String WINDOWS_OPTIONS_SET = "windows.optionsSet"
+innr public abstract interface static ApproveCallback
+innr public abstract interface static StateStore
+innr public abstract static ApproveContext
+innr public abstract static FileFilter
+innr public final static FileNameExtensionFilter
+meth public <%0 extends java.lang.Object> {%%0} getPlatformProperty(java.lang.String)
+meth public boolean isAcceptAllFileFilterUsed()
+meth public boolean isDirectorySelectionEnabled()
+meth public boolean isFileHidingEnabled()
+meth public boolean isFileSelectionEnabled()
+meth public boolean isMultiSelectionEnabled()
+meth public boolean removeChoosableFileFilter(com.formdev.flatlaf.util.SystemFileChooser$FileFilter)
+meth public com.formdev.flatlaf.util.SystemFileChooser$ApproveCallback getApproveCallback()
+meth public com.formdev.flatlaf.util.SystemFileChooser$FileFilter getAcceptAllFileFilter()
+meth public com.formdev.flatlaf.util.SystemFileChooser$FileFilter getFileFilter()
+meth public com.formdev.flatlaf.util.SystemFileChooser$FileFilter[] getChoosableFileFilters()
+meth public int getApproveButtonMnemonic()
+meth public int getDialogType()
+meth public int getFileSelectionMode()
+meth public int showDialog(java.awt.Component,java.lang.String)
+meth public int showOpenDialog(java.awt.Component)
+meth public int showSaveDialog(java.awt.Component)
+meth public java.io.File getCurrentDirectory()
+meth public java.io.File getSelectedFile()
+meth public java.io.File[] getSelectedFiles()
+meth public java.lang.String getApproveButtonText()
+meth public java.lang.String getDialogTitle()
+meth public java.lang.String getStateStoreID()
+meth public static com.formdev.flatlaf.util.SystemFileChooser$StateStore getStateStore()
+meth public static void setStateStore(com.formdev.flatlaf.util.SystemFileChooser$StateStore)
+meth public void addChoosableFileFilter(com.formdev.flatlaf.util.SystemFileChooser$FileFilter)
+meth public void putPlatformProperty(java.lang.String,java.lang.Object)
+meth public void resetChoosableFileFilters()
+meth public void setAcceptAllFileFilterUsed(boolean)
+meth public void setApproveButtonMnemonic(char)
+meth public void setApproveButtonMnemonic(int)
+meth public void setApproveButtonText(java.lang.String)
+meth public void setApproveCallback(com.formdev.flatlaf.util.SystemFileChooser$ApproveCallback)
+meth public void setCurrentDirectory(java.io.File)
+meth public void setDialogTitle(java.lang.String)
+meth public void setDialogType(int)
+meth public void setFileFilter(com.formdev.flatlaf.util.SystemFileChooser$FileFilter)
+meth public void setFileHidingEnabled(boolean)
+meth public void setFileSelectionMode(int)
+meth public void setMultiSelectionEnabled(boolean)
+meth public void setSelectedFile(java.io.File)
+meth public void setSelectedFiles(java.io.File[])
+meth public void setStateStoreID(java.lang.String)
+supr java.lang.Object
+hfds acceptAllFileFilter,approveButtonMnemonic,approveButtonText,approveCallback,approveResult,currentDirectory,dialogTitle,dialogType,fileFilter,fileSelectionMode,filters,inMemoryStateStore,keepAcceptAllAtEnd,multiSelection,platformProperties,selectedFile,selectedFiles,stateStore,stateStoreID,useAcceptAllFileFilter,useFileHiding
+hcls AcceptAllFileFilter,FileChooserProvider,LinuxFileChooserProvider,MacFileChooserProvider,SwingFileChooserProvider,SystemFileChooserProvider,WindowsFileChooserProvider
+
+CLSS public abstract interface static com.formdev.flatlaf.util.SystemFileChooser$ApproveCallback
+ outer com.formdev.flatlaf.util.SystemFileChooser
+meth public abstract int approve(java.io.File[],com.formdev.flatlaf.util.SystemFileChooser$ApproveContext)
+
+CLSS public abstract static com.formdev.flatlaf.util.SystemFileChooser$ApproveContext
+ outer com.formdev.flatlaf.util.SystemFileChooser
+cons public init()
+meth public abstract !varargs int showMessageDialog(int,java.lang.String,java.lang.String,int,java.lang.String[])
+supr java.lang.Object
+
+CLSS public abstract static com.formdev.flatlaf.util.SystemFileChooser$FileFilter
+ outer com.formdev.flatlaf.util.SystemFileChooser
+cons public init()
+meth public abstract java.lang.String getDescription()
+supr java.lang.Object
+
+CLSS public final static com.formdev.flatlaf.util.SystemFileChooser$FileNameExtensionFilter
+ outer com.formdev.flatlaf.util.SystemFileChooser
+cons public !varargs init(java.lang.String,java.lang.String[])
+meth public java.lang.String getDescription()
+meth public java.lang.String toString()
+meth public java.lang.String[] getExtensions()
+supr com.formdev.flatlaf.util.SystemFileChooser$FileFilter
+hfds description,extensions
+
+CLSS public abstract interface static com.formdev.flatlaf.util.SystemFileChooser$StateStore
+ outer com.formdev.flatlaf.util.SystemFileChooser
+fld public final static java.lang.String KEY_CURRENT_DIRECTORY = "currentDirectory"
+meth public abstract java.lang.String get(java.lang.String,java.lang.String)
+meth public abstract void put(java.lang.String,java.lang.String)
+
 CLSS public com.formdev.flatlaf.util.SystemInfo
 cons public init()
 fld public final static boolean isAARCH64
@@ -806,13 +914,21 @@ supr java.lang.Object
 
 CLSS public com.formdev.flatlaf.util.UIScale
 cons public init()
+fld public final static java.lang.String PROP_USER_SCALE_FACTOR = "userScaleFactor"
+fld public final static java.lang.String PROP_ZOOM_FACTOR = "zoomFactor"
 meth public static boolean isSystemScalingEnabled()
+meth public static boolean setZoomFactor(float)
+meth public static boolean zoomIn()
+meth public static boolean zoomOut()
+meth public static boolean zoomReset()
 meth public static double getSystemScaleFactor(java.awt.Graphics2D)
 meth public static double getSystemScaleFactor(java.awt.GraphicsConfiguration)
 meth public static float computeFontScaleFactor(java.awt.Font)
 meth public static float getUserScaleFactor()
+meth public static float getZoomFactor()
 meth public static float scale(float)
 meth public static float unscale(float)
+meth public static float[] getSupportedZoomFactors()
 meth public static int scale(int)
 meth public static int scale2(int)
 meth public static int unscale(int)
@@ -822,8 +938,9 @@ meth public static javax.swing.plaf.FontUIResource applyCustomScaleFactor(javax.
 meth public static void addPropertyChangeListener(java.beans.PropertyChangeListener)
 meth public static void removePropertyChangeListener(java.beans.PropertyChangeListener)
 meth public static void scaleGraphics(java.awt.Graphics2D)
+meth public static void setSupportedZoomFactors(float[])
 supr java.lang.Object
-hfds DEBUG,changeSupport,initialized,jreHiDPI,scaleFactor
+hfds DEBUG,changeSupport,ignoreFontChange,inUnitTests,initialized,jreHiDPI,listenerInitialized,scaleFactor,supportedZoomFactors,unzoomedScaleFactor,zoomFactor
 
 CLSS public java.awt.Color
 cons public init(float,float,float)

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

@@ -1086,8 +1086,9 @@ public interface FlatClientProperties
 	 * <strong>Value type</strong> {@link java.lang.String}<br>
 	 * <strong>Allowed Values</strong>
 	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_PREFERRED} (default),
-	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_EQUAL} or
-	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_COMPACT}
+	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_EQUAL},
+	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_COMPACT} or
+	 *     {@link #TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY}
 	 */
 	String TABBED_PANE_TAB_WIDTH_MODE = "JTabbedPane.tabWidthMode";
 
@@ -1113,6 +1114,14 @@ public interface FlatClientProperties
 	 */
 	String TABBED_PANE_TAB_WIDTH_MODE_COMPACT = "compact";
 
+	/**
+	 * All tabs are smaller because they show only the tab icon, but no tab title.
+	 *
+	 * @see #TABBED_PANE_TAB_WIDTH_MODE
+	 * @since 3.7
+	 */
+	String TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY = "iconOnly";
+
 	/**
 	 * Specifies the tab icon placement (relative to tab title).
 	 * <p>

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

@@ -310,8 +310,8 @@ public abstract class FlatLaf
 		// install submenu usability helper
 		subMenuUsabilityHelperInstalled = SubMenuUsabilityHelper.install();
 
-		// install Linux popup menu canceler
-		if( SystemInfo.isLinux )
+		// install Linux/macOS popup menu canceler
+		if( SystemInfo.isLinux || SystemInfo.isMacOS )
 			linuxPopupMenuCanceler = new LinuxPopupMenuCanceler();
 
 		// listen to desktop property changes to update UI if system font or scaling changes
@@ -368,6 +368,22 @@ public abstract class FlatLaf
 					String.format( "a, address { color: #%06x; }", linkColor.getRGB() & 0xffffff ) );
 			}
 		};
+
+		// Initialize UIScale user scale factor immediately after FlatLaf was activated,
+		// which is necessary to ensure that UIScale.setZoomFactor(float)
+		// scales FlatLaf defaultDont correctly even if UIScale.scale() was not yet used.
+		// In other words: Without this, UIScale.setZoomFactor(float) would
+		// not work correctly if invoked between FlatLaf.setup() and crating UI.
+		PropertyChangeListener listener = new PropertyChangeListener() {
+			@Override
+			public void propertyChange( PropertyChangeEvent e ) {
+				if( "lookAndFeel".equals( e.getPropertyName() ) ) {
+					UIManager.removePropertyChangeListener( this );
+					UIScale.getUserScaleFactor();
+				}
+			}
+		};
+		UIManager.addPropertyChangeListener( listener );
 	}
 
 	@Override
@@ -707,11 +723,22 @@ public abstract class FlatLaf
 			uiFont = ((ActiveFont)defaultFont).derive( baseFont, fontSize -> {
 				return Math.round( fontSize * UIScale.computeFontScaleFactor( baseFont ) );
 			} );
-		}
+		} else if( defaultFont instanceof LazyValue )
+			uiFont = ActiveFont.toUIResource( (Font) ((LazyValue)defaultFont).createValue( defaults ) );
 
 		// increase font size if system property "flatlaf.uiScale" is set
 		uiFont = UIScale.applyCustomScaleFactor( uiFont );
 
+		// apply zoom factor to font size
+		float zoomFactor = UIScale.getZoomFactor();
+		if( zoomFactor != 1 ) {
+			// see also UIScale.setZoomFactor()
+			int unzoomedFontSize = uiFont.getSize();
+			defaults.put( "defaultFont.unzoomedSize", unzoomedFontSize );
+			int newFontSize = Math.max( Math.round( unzoomedFontSize * zoomFactor ), 1 );
+			uiFont = new FontUIResource( uiFont.deriveFont( (float) newFontSize ) );
+		}
+
 		// set default font
 		defaults.put( "defaultFont", uiFont );
 	}
@@ -1768,7 +1795,7 @@ public abstract class FlatLaf
 				return toUIResource( baseFont );
 		}
 
-		private FontUIResource toUIResource( Font font ) {
+		private static FontUIResource toUIResource( Font font ) {
 			// make sure that font is a UIResource for LaF switching
 			return (font instanceof FontUIResource)
 				? (FontUIResource) font

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

@@ -16,8 +16,10 @@
 
 package com.formdev.flatlaf;
 
+import javax.swing.JFileChooser;
 import javax.swing.JPopupMenu;
 import javax.swing.SwingUtilities;
+import com.formdev.flatlaf.util.SystemFileChooser;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -246,6 +248,17 @@ public interface FlatSystemProperties
 	 */
 	String USE_SUB_MENU_SAFE_TRIANGLE = "flatlaf.useSubMenuSafeTriangle";
 
+	/**
+	 * Specifies whether {@link SystemFileChooser} uses operating system file dialogs.
+	 * If set to {@code false}, the {@link JFileChooser} is used instead.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 *
+	 * @since 3.7
+	 */
+	String USE_SYSTEM_FILE_CHOOSER = "flatlaf.useSystemFileChooser";
+
 	/**
 	 * Checks whether a system property is set and returns {@code true} if its value
 	 * is {@code "true"} (case-insensitive), otherwise it returns {@code false}.

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

@@ -58,9 +58,9 @@ public class IntelliJTheme
 	public final boolean dark;
 	public final String author;
 
-	private Map<String, String> jsonColors;
-	private Map<String, Object> jsonUI;
-	private Map<String, Object> jsonIcons;
+	private final Map<String, String> jsonColors;
+	private final Map<String, Object> jsonUI;
+	private final Map<String, Object> jsonIcons;
 
 	private Map<String, String> namedColors = Collections.emptyMap();
 
@@ -276,11 +276,6 @@ public class IntelliJTheme
 
 			put( properties, key, value );
 		}
-
-		// let Java release memory
-		jsonColors = null;
-		jsonUI = null;
-		jsonIcons = null;
 	}
 
 	private String get( Properties properties, Map<String, String> themeSpecificProps, String key ) {

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

@@ -30,7 +30,7 @@ import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 
 /**
- * Cancels (hides) popup menus on Linux.
+ * Cancels (hides) popup menus on Linux and macOS.
  * <p>
  * On Linux, popups are not hidden under following conditions, which results in
  * misplaced popups:
@@ -41,7 +41,13 @@ import javax.swing.event.ChangeListener;
  *   <li>window deactivated (e.g. activated other application)
  * </ul>
  *
- * On Windows and macOS, popups are automatically hidden.
+ * On macOS, popups are usually automatically hidden, but not always.
+ * When resizing a window, then it depends where clicking to start resizing (and on the Java version).
+ * E.g. with Java 25, clicking at bottom-right corner inside of the window does not hide the popups.
+ * But clicking on same corner outside of the window, hides the popup.
+ *
+ * <p>
+ * On Windows, popups are automatically hidden.
  * <p>
  * The implementation is similar to what's done in
  * {@code javax.swing.plaf.basic.BasicPopupMenuUI.MouseGrabber},

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

@@ -45,6 +45,7 @@ import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Properties;
 import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import javax.swing.Icon;
@@ -431,7 +432,7 @@ class UIDefaultsLoader
 	enum ValueType { UNKNOWN, STRING, BOOLEAN, CHARACTER, INTEGER, INTEGERORFLOAT, FLOAT, BORDER, ICON, INSETS, DIMENSION, COLOR, FONT,
 		SCALEDINTEGER, SCALEDFLOAT, SCALEDINSETS, SCALEDDIMENSION, INSTANCE, CLASS, GRAYFILTER, NULL, LAZY }
 
-	private static final ValueType[] tempResultValueType = new ValueType[1];
+	private static final AtomicReference<ValueType> tempResultValueType = new AtomicReference<>();
 	private static Map<Class<?>, ValueType> javaValueTypes;
 	private static Map<String, ValueType> knownValueTypes;
 
@@ -441,7 +442,7 @@ class UIDefaultsLoader
 		return parseValue( key, value, valueType, null, v -> v, Collections.emptyList() );
 	}
 
-	static Object parseValue( String key, String value, Class<?> javaValueType, ValueType[] resultValueType,
+	static Object parseValue( String key, String value, Class<?> javaValueType, AtomicReference<ValueType> resultValueType,
 		Function<String, String> resolver, List<ClassLoader> addonClassLoaders )
 			throws IllegalArgumentException
 	{
@@ -450,7 +451,7 @@ class UIDefaultsLoader
 
 		// do not parse styles here
 		if( key.startsWith( "[style]" ) ) {
-			resultValueType[0] = ValueType.STRING;
+			resultValueType.set( ValueType.STRING );
 			return value;
 		}
 
@@ -458,7 +459,7 @@ class UIDefaultsLoader
 
 		// null
 		if( value.equals( "null" ) || value.isEmpty() ) {
-			resultValueType[0] = ValueType.NULL;
+			resultValueType.set( ValueType.NULL );
 			return null;
 		}
 
@@ -514,14 +515,14 @@ class UIDefaultsLoader
 		} else {
 			// false, true
 			switch( value ) {
-				case "false":	resultValueType[0] = ValueType.BOOLEAN; return false;
-				case "true":	resultValueType[0] = ValueType.BOOLEAN; return true;
+				case "false":	resultValueType.set( ValueType.BOOLEAN ); return false;
+				case "true":	resultValueType.set( ValueType.BOOLEAN ); return true;
 			}
 
 			// check for function "lazy"
 			//     Syntax: lazy(uiKey)
 			if( value.startsWith( "lazy(" ) && value.endsWith( ")" ) ) {
-				resultValueType[0] = ValueType.LAZY;
+				resultValueType.set( ValueType.LAZY );
 				String uiKey = StringUtils.substringTrimmed( value, 5, value.length() - 1 );
 				return (LazyValue) t -> {
 					return lazyUIManagerGet( uiKey );
@@ -602,7 +603,7 @@ class UIDefaultsLoader
 			}
 		}
 
-		resultValueType[0] = valueType;
+		resultValueType.set( valueType );
 
 		// parse value
 		switch( valueType ) {
@@ -629,14 +630,14 @@ class UIDefaultsLoader
 			default:
 				// string
 				if( value.startsWith( "\"" ) && value.endsWith( "\"" ) ) {
-					resultValueType[0] = ValueType.STRING;
+					resultValueType.set( ValueType.STRING );
 					return value.substring( 1, value.length() - 1 );
 				}
 
 				// colors
 				if( value.startsWith( "#" ) || value.endsWith( ")" ) ) {
 					Object color = parseColorOrFunction( value, resolver );
-					resultValueType[0] = (color != null) ? ValueType.COLOR : ValueType.NULL;
+					resultValueType.set( (color != null) ? ValueType.COLOR : ValueType.NULL );
 					return color;
 				}
 
@@ -648,7 +649,7 @@ class UIDefaultsLoader
 					// integer
 					try {
 						Integer integer = parseInteger( value );
-						resultValueType[0] = ValueType.INTEGER;
+						resultValueType.set( ValueType.INTEGER );
 						return integer;
 					} catch( NumberFormatException ex ) {
 						// ignore
@@ -657,7 +658,7 @@ class UIDefaultsLoader
 					// float
 					try {
 						Float f = parseFloat( value );
-						resultValueType[0] = ValueType.FLOAT;
+						resultValueType.set( ValueType.FLOAT );
 						return f;
 					} catch( NumberFormatException ex ) {
 						// ignore
@@ -665,7 +666,7 @@ class UIDefaultsLoader
 				}
 
 				// string
-				resultValueType[0] = ValueType.STRING;
+				resultValueType.set( ValueType.STRING );
 				return value;
 		}
 	}

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

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf.icons;
 
-import static com.formdev.flatlaf.util.UIScale.*;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics;
@@ -29,7 +28,7 @@ import com.formdev.flatlaf.util.UIScale;
 /**
  * Base class for icons that scales width and height, creates and initializes
  * a scaled graphics context for icon painting.
- *
+ * <p>
  * Subclasses do not need to scale icon painting.
  *
  * @author Karl Tauber
@@ -37,10 +36,15 @@ import com.formdev.flatlaf.util.UIScale;
 public abstract class FlatAbstractIcon
 	implements Icon, UIResource
 {
+	/** Unscaled icon width. */
 	protected final int width;
+	/** Unscaled icon height. */
 	protected final int height;
 	protected Color color;
 
+	/** Additional icon scale factor. */
+	private float scale = 1;
+
 	public FlatAbstractIcon( int width, int height, Color color ) {
 		this.width = width;
 		this.height = height;
@@ -61,6 +65,9 @@ public abstract class FlatAbstractIcon
 
 			g2.translate( x, y );
 			UIScale.scaleGraphics( g2 );
+			float scale = getScale();
+			if( scale != 1 )
+				g2.scale( scale, scale );
 
 			if( color != null )
 				g2.setColor( color );
@@ -71,19 +78,71 @@ public abstract class FlatAbstractIcon
 		}
 	}
 
-	/** @since 3.5.2 */
+	/**
+	 * Paints icon background. Default implementation does nothing.
+	 * Can be overridden to paint specific icon background.
+	 * <p>
+	 * The bounds of the area to be filled are:
+	 * x, y, {@link #getIconWidth()}, {@link #getIconHeight()}.
+	 * <p>
+	 * In contrast to {@link #paintIcon(Component, Graphics2D)},
+	 * the graphics context {@code g} is not translated and not scaled.
+	 *
+	 * @since 3.5.2
+	 */
 	protected void paintBackground( Component c, Graphics2D g, int x, int y ) {
 	}
 
+	/**
+	 * Paints icon.
+	 * <p>
+	 * The graphics context is translated and scaled.
+	 * This means that icon x,y coordinates are {@code 0,0}
+	 * and it is not necessary to scale coordinates within this method.
+	 * <p>
+	 * The bounds to be used for icon painting are:
+	 * 0, 0, {@link #width}, {@link #height}.
+	 */
 	protected abstract void paintIcon( Component c, Graphics2D g );
 
+	/**
+	 * Returns the scaled icon width.
+	 */
 	@Override
 	public int getIconWidth() {
-		return scale( width );
+		return scale( UIScale.scale( width ) );
 	}
 
+	/**
+	 * Returns the scaled icon height.
+	 */
 	@Override
 	public int getIconHeight() {
-		return scale( height );
+		return scale( UIScale.scale( height ) );
+	}
+
+	/** @since 3.7 */
+	public float getScale() {
+		return scale;
+	}
+
+	/** @since 3.7 */
+	public void setScale( float scale ) {
+		this.scale = scale;
+	}
+
+	/**
+	 * Multiplies the given value by the icon scale factor {@link #getScale()} and rounds the result.
+	 * <p>
+	 * If you want scale a {@code float} or {@code double} value,
+	 * simply use: {@code myFloatValue * }{@link #getScale()}.
+	 * <p>
+	 * Do not use this method when painting icon in {@link #paintIcon(Component, Graphics2D)}.
+	 *
+	 * @since 3.7
+	 */
+	protected int scale( int size ) {
+		float scale = getScale();
+		return (scale == 1) ? size : Math.round( size * scale );
 	}
 }

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

@@ -17,7 +17,6 @@
 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;
@@ -26,7 +25,8 @@ import java.awt.geom.Path2D;
 import java.awt.geom.Rectangle2D;
 import java.awt.geom.RoundRectangle2D;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -36,8 +36,11 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="capsLockIconScale", fieldName="scale" )
+@StyleableField( cls=FlatAbstractIcon.class, key="capsLockIconColor", fieldName="color" )
 public class FlatCapsLockIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	private Path2D path;
 
@@ -45,23 +48,6 @@ public class FlatCapsLockIcon
 		super( 16, 16, UIManager.getColor( "PasswordField.capsLockIconColor" ) );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		Object oldValue;
-		switch( key ) {
-			case "capsLockIconColor": oldValue = color; color = (Color) value; return oldValue;
-			default: throw new UnknownStyleException( key );
-		}
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		switch( key ) {
-			case "capsLockIconColor": return color;
-			default: return null;
-		}
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*

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

@@ -24,13 +24,13 @@ import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
 import java.awt.geom.RoundRectangle2D;
-import java.util.Map;
 import javax.swing.AbstractButton;
 import javax.swing.JComponent;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -101,8 +101,10 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="scale" )
 public class FlatCheckBoxIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	protected final String style = UIManager.getString( getPropertyPrefix() + "icon.style" );
 	@Styleable protected float focusWidth = getUIFloat( "CheckBox.icon.focusWidth", UIManager.getInt( "Component.focusWidth" ), style );
@@ -197,21 +199,6 @@ public class FlatCheckBoxIcon
 		super( ICON_SIZE, ICON_SIZE, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		boolean indeterminate = isIndeterminate( c );
@@ -306,7 +293,7 @@ public class FlatCheckBoxIcon
 
 	/** @since 2 */
 	public float getFocusWidth() {
-		return focusWidth;
+		return focusWidth * getScale();
 	}
 
 	protected Color getFocusColor( Component c ) {

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

@@ -21,12 +21,12 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.AbstractButton;
 import javax.swing.JMenuItem;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 
 /**
  * Icon for {@link javax.swing.JCheckBoxMenuItem}.
@@ -38,8 +38,10 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="scale" )
 public class FlatCheckBoxMenuItemIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Color checkmarkColor = UIManager.getColor( "CheckBoxMenuItem.icon.checkmarkColor" );
 	@Styleable protected Color disabledCheckmarkColor = UIManager.getColor( "CheckBoxMenuItem.icon.disabledCheckmarkColor" );
@@ -49,21 +51,6 @@ public class FlatCheckBoxMenuItemIcon
 		super( 15, 15, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g2 ) {
 		boolean selected = (c instanceof AbstractButton) && ((AbstractButton)c).isSelected();

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

@@ -21,12 +21,12 @@ import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.AbstractButton;
 import javax.swing.ButtonModel;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -39,8 +39,10 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  * @author Karl Tauber
  * @since 1.5
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="clearIconScale", fieldName="scale" )
 public class FlatClearIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Color clearIconColor = UIManager.getColor( "SearchField.clearIconColor" );
 	@Styleable protected Color clearIconHoverColor = UIManager.getColor( "SearchField.clearIconHoverColor" );
@@ -58,21 +60,6 @@ public class FlatClearIcon
 		this.ignoreButtonState = ignoreButtonState;
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		if( !ignoreButtonState && c instanceof AbstractButton ) {

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

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf.icons;
 
-import static com.formdev.flatlaf.util.UIScale.*;
 import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
@@ -24,11 +23,12 @@ import java.awt.Graphics2D;
 import java.awt.RenderingHints;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
+import com.formdev.flatlaf.util.UIScale;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -52,8 +52,10 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="scale" )
 public class FlatHelpButtonIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected int focusWidth = UIManager.getInt( "Component.focusWidth" );
 	@Styleable protected Color focusColor = UIManager.getColor( "Component.focusColor" );
@@ -76,21 +78,6 @@ public class FlatHelpButtonIcon
 		super( 0, 0, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g2 ) {
 		/*
@@ -167,12 +154,12 @@ public class FlatHelpButtonIcon
 
 	@Override
 	public int getIconWidth() {
-		return scale( iconSize() );
+		return scale( UIScale.scale( iconSize() ) );
 	}
 
 	@Override
 	public int getIconHeight() {
-		return scale( iconSize() );
+		return scale( UIScale.scale( iconSize() ) );
 	}
 
 	private int iconSize() {

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

@@ -21,12 +21,12 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.JMenu;
 import javax.swing.UIManager;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 
 /**
  * "arrow" icon for {@link javax.swing.JMenu}.
@@ -39,8 +39,10 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="scale" )
 public class FlatMenuArrowIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected String arrowType = UIManager.getString( "Component.arrowType" );
 	@Styleable protected Color arrowColor = UIManager.getColor( "Menu.icon.arrowColor" );
@@ -51,21 +53,6 @@ public class FlatMenuArrowIcon
 		super( 6, 10, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		if( c != null && !c.getComponentOrientation().isLeftToRight() )

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

@@ -21,11 +21,11 @@ import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Area;
 import java.awt.geom.Ellipse2D;
-import java.util.Map;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -38,8 +38,10 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  * @author Karl Tauber
  * @since 1.5
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="searchIconScale", fieldName="scale" )
 public class FlatSearchIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Color searchIconColor = UIManager.getColor( "SearchField.searchIconColor" );
 	@Styleable protected Color searchIconHoverColor = UIManager.getColor( "SearchField.searchIconHoverColor" );
@@ -58,21 +60,6 @@ public class FlatSearchIcon
 		this.ignoreButtonState = ignoreButtonState;
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*

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

@@ -22,11 +22,11 @@ import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import java.util.Map;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
-import com.formdev.flatlaf.ui.FlatStylingSupport;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
@@ -46,8 +46,10 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=FlatAbstractIcon.class, key="closeScale", fieldName="scale" )
 public class FlatTabbedPaneCloseIcon
 	extends FlatAbstractIcon
+	implements StyleableObject
 {
 	@Styleable protected Dimension closeSize = UIManager.getDimension( "TabbedPane.closeSize" );
 	@Styleable protected int closeArc = UIManager.getInt( "TabbedPane.closeArc" );
@@ -65,21 +67,6 @@ public class FlatTabbedPaneCloseIcon
 		super( 16, 16, null );
 	}
 
-	/** @since 2 */
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		// paint background

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

@@ -23,7 +23,6 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Paint;
-import java.util.Map;
 import javax.swing.JComboBox;
 import javax.swing.JComponent;
 import javax.swing.JScrollPane;
@@ -32,7 +31,7 @@ import javax.swing.UIManager;
 import javax.swing.plaf.basic.BasicBorders;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
-import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableBorder;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.util.DerivedColor;
 
 /**
@@ -67,7 +66,7 @@ import com.formdev.flatlaf.util.DerivedColor;
  */
 public class FlatBorder
 	extends BasicBorders.MarginBorder
-	implements StyleableBorder
+	implements StyleableObject
 {
 	@Styleable protected int focusWidth = UIManager.getInt( "Component.focusWidth" );
 	@Styleable protected float innerFocusWidth = FlatUIUtils.getUIFloat( "Component.innerFocusWidth", 0 );
@@ -92,24 +91,6 @@ public class FlatBorder
 	/** @since 2 */ @Styleable protected Color outlineColor;
 	/** @since 2 */ @Styleable protected Color outlineFocusedColor;
 
-	/** @since 2 */
-	@Override
-	public Object applyStyleProperty( String key, Object value ) {
-		return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
-	}
-
-	/** @since 2 */
-	@Override
-	public Map<String, Class<?>> getStyleableInfos() {
-		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
-	}
-
-	/** @since 2.5 */
-	@Override
-	public Object getStyleableValue( String key ) {
-		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
-	}
-
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		Graphics2D g2 = (Graphics2D) g.create();

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

@@ -58,8 +58,8 @@ import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.text.View;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
-import com.formdev.flatlaf.icons.FlatHelpButtonIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.HiDPIUtils;
@@ -369,8 +369,8 @@ public class FlatButtonUI
 	/** @since 2 */
 	protected Object applyStyleProperty( AbstractButton b, String key, Object value ) {
 		if( key.startsWith( "help." ) ) {
-			if( !(helpButtonIcon instanceof FlatHelpButtonIcon) )
-				return new UnknownStyleException( key );
+			if( !(helpButtonIcon instanceof StyleableObject) )
+				throw new UnknownStyleException( key );
 
 			if( helpButtonIconShared ) {
 				helpButtonIcon = FlatStylingSupport.cloneIcon( helpButtonIcon );
@@ -378,7 +378,7 @@ public class FlatButtonUI
 			}
 
 			key = key.substring( "help.".length() );
-			return ((FlatHelpButtonIcon)helpButtonIcon).applyStyleProperty( key, value );
+			return ((StyleableObject)helpButtonIcon).applyStyleProperty( key, value );
 		}
 
 		// update internal values; otherwise isCustomBackground() and isCustomForeground() would return wrong results
@@ -399,8 +399,8 @@ public class FlatButtonUI
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
 		Map<String, Class<?>> infos = FlatStylingSupport.getAnnotatedStyleableInfos( this, c.getBorder() );
-		if( helpButtonIcon instanceof FlatHelpButtonIcon )
-			FlatStylingSupport.putAllPrefixKey( infos, "help.", ((FlatHelpButtonIcon)helpButtonIcon).getStyleableInfos() );
+		if( helpButtonIcon instanceof StyleableObject )
+			FlatStylingSupport.putAllPrefixKey( infos, "help.", ((StyleableObject)helpButtonIcon).getStyleableInfos() );
 		return infos;
 	}
 
@@ -408,8 +408,8 @@ public class FlatButtonUI
 	@Override
 	public Object getStyleableValue( JComponent c, String key ) {
 		if( key.startsWith( "help." ) ) {
-			return (helpButtonIcon instanceof FlatHelpButtonIcon)
-				? ((FlatHelpButtonIcon)helpButtonIcon).getStyleableValue( key.substring( "help.".length() ) )
+			return (helpButtonIcon instanceof StyleableObject)
+				? ((StyleableObject)helpButtonIcon).getStyleableValue( key.substring( "help.".length() ) )
 				: null;
 		}
 

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

@@ -113,6 +113,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @uiDefault ComboBox.buttonBackground			Color	optional
  * @uiDefault ComboBox.buttonEditableBackground	Color	optional
  * @uiDefault ComboBox.buttonFocusedBackground	Color	optional; defaults to ComboBox.focusedBackground
+ * @uiDefault ComboBox.buttonFocusedEditableBackground	Color	optional; defaults to ComboBox.buttonEditableBackground
  * @uiDefault ComboBox.buttonSeparatorWidth		int or float	optional; defaults to Component.borderWidth
  * @uiDefault ComboBox.buttonSeparatorColor		Color	optional
  * @uiDefault ComboBox.buttonDisabledSeparatorColor Color	optional
@@ -147,6 +148,7 @@ public class FlatComboBoxUI
 	@Styleable protected Color buttonBackground;
 	@Styleable protected Color buttonEditableBackground;
 	@Styleable protected Color buttonFocusedBackground;
+	/** @since 3.7.1 */ @Styleable protected Color buttonFocusedEditableBackground;
 	/** @since 2 */ @Styleable protected float buttonSeparatorWidth;
 	/** @since 2 */ @Styleable protected Color buttonSeparatorColor;
 	/** @since 2 */ @Styleable protected Color buttonDisabledSeparatorColor;
@@ -258,6 +260,7 @@ public class FlatComboBoxUI
 
 		buttonBackground = UIManager.getColor( "ComboBox.buttonBackground" );
 		buttonFocusedBackground = UIManager.getColor( "ComboBox.buttonFocusedBackground" );
+		buttonFocusedEditableBackground = UIManager.getColor( "ComboBox.buttonFocusedEditableBackground" );
 		buttonEditableBackground = UIManager.getColor( "ComboBox.buttonEditableBackground" );
 		buttonSeparatorWidth = FlatUIUtils.getUIFloat( "ComboBox.buttonSeparatorWidth", FlatUIUtils.getUIFloat( "Component.borderWidth", 1 ) );
 		buttonSeparatorColor = UIManager.getColor( "ComboBox.buttonSeparatorColor" );
@@ -293,6 +296,7 @@ public class FlatComboBoxUI
 		buttonBackground = null;
 		buttonEditableBackground = null;
 		buttonFocusedBackground = null;
+		buttonFocusedEditableBackground = null;
 		buttonSeparatorColor = null;
 		buttonDisabledSeparatorColor = null;
 		buttonArrowColor = null;
@@ -587,7 +591,7 @@ public class FlatComboBoxUI
 			// paint arrow button background
 			if( enabled && !isCellRenderer && arrowButton.isVisible() ) {
 				Color buttonColor = paintButton
-					? buttonEditableBackground
+					? (buttonFocusedEditableBackground != null && isPermanentFocusOwner( comboBox ) ? buttonFocusedEditableBackground : buttonEditableBackground)
 					: (buttonFocusedBackground != null || focusedBackground != null) && isPermanentFocusOwner( comboBox )
 						? (buttonFocusedBackground != null ? buttonFocusedBackground : focusedBackground)
 						: buttonBackground;

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

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

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

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

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

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

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

@@ -24,6 +24,7 @@ import java.awt.event.MouseEvent;
 import java.awt.geom.AffineTransform;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
+import javax.swing.JOptionPane;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -34,9 +35,9 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @author Karl Tauber
  * @since 2.5
  */
-class FlatNativeLinuxLibrary
+public class FlatNativeLinuxLibrary
 {
-	private static int API_VERSION_LINUX = 3001;
+	private static int API_VERSION_LINUX = 3003;
 
 	/**
 	 * Checks whether native library is loaded/available.
@@ -44,10 +45,13 @@ class FlatNativeLinuxLibrary
 	 * <b>Note</b>: It is required to invoke this method before invoking any other
 	 *              method of this class. Otherwise, the native library may not be loaded.
 	 */
-	static boolean isLoaded() {
+	public static boolean isLoaded() {
 		return SystemInfo.isLinux && FlatNativeLibrary.isLoaded( API_VERSION_LINUX );
 	}
 
+
+	//---- X Window System ----------------------------------------------------
+
 	// direction for _NET_WM_MOVERESIZE message
 	// see https://specifications.freedesktop.org/wm-spec/latest/ar01s04.html
 	static final int
@@ -124,4 +128,110 @@ class FlatNativeLinuxLibrary
 		return (window instanceof JFrame && JFrame.isDefaultLookAndFeelDecorated() && ((JFrame)window).isUndecorated()) ||
 			(window instanceof JDialog && JDialog.isDefaultLookAndFeelDecorated() && ((JDialog)window).isUndecorated());
 	}
+
+
+	//---- GTK ----------------------------------------------------------------
+
+	private static Boolean isGtk3Available;
+
+	/**
+	 * Checks whether GTK 3 is available.
+	 * Use this before invoking any native method that uses GTK.
+	 * Otherwise the app may terminate immediately if GTK is not installed.
+	 * <p>
+	 * This works because Java uses {@code dlopen(RTLD_LAZY)} to load JNI libraries,
+	 * which only resolves symbols as the code that references them is executed.
+	 *
+	 * @since 3.7
+	 */
+	public static boolean isGtk3Available() {
+		if( isGtk3Available == null )
+			isGtk3Available = isLibAvailable( "libgtk-3.so.0" ) || isLibAvailable( "libgtk-3.so" );
+		return isGtk3Available;
+	}
+
+	private native static boolean isLibAvailable( String libname );
+
+	/**
+	 * https://docs.gtk.org/gtk3/iface.FileChooser.html#properties
+	 *
+	 * @since 3.7
+	 */
+	public static final int
+		FC_select_folder					= 1 << 0,
+		FC_select_multiple					= 1 << 1,
+		FC_show_hidden						= 1 << 2,
+		FC_local_only						= 1 << 3,  // default
+		FC_do_overwrite_confirmation		= 1 << 4,  // GTK 3 only; removed and always-on in GTK 4
+		FC_create_folders					= 1 << 5;  // default for Save
+
+	/**
+	 * Shows the Linux/GTK system file dialog
+	 * <a href="https://docs.gtk.org/gtk3/class.FileChooserDialog.html">GtkFileChooserDialog</a>.
+	 * <p>
+	 * Uses {@code GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER} if {@link #FC_select_folder} is set in parameter {@code optionsSet}.
+	 * Otherwise uses {@code GTK_FILE_CHOOSER_ACTION_OPEN} if parameter {@code open} is {@code true},
+	 * or {@code GTK_FILE_CHOOSER_ACTION_SAVE} if {@code false}.
+	 * <p>
+	 * <b>Note:</b> This method blocks the current thread until the user closes
+	 * the file dialog. It is highly recommended to invoke it from a new thread
+	 * to avoid blocking the AWT event dispatching thread.
+	 *
+	 * @param owner the owner of the file dialog; or {@code null}
+	 * @param dark preferred appearance of the file dialog: {@code 1} = prefer dark, {@code 0} = prefer light, {@code -1} = default
+	 * @param open if {@code true}, shows the open dialog; if {@code false}, shows the save dialog
+	 * @param title text displayed in dialog title; or {@code null}
+	 * @param okButtonLabel text displayed in default button; or {@code null}.
+	 *        Use '_' for mnemonics (e.g. "_Choose")
+	 *        Use '__' for '_' character (e.g. "Choose__and__Quit").
+	 * @param currentName user-editable filename currently shown in the filename field in save dialog; or {@code null}
+	 * @param currentFolder current directory shown in the dialog; or {@code null}
+	 * @param optionsSet options to set; see {@code FOS_*} constants
+	 * @param optionsClear options to clear; see {@code FOS_*} constants
+	 * @param callback approve callback; or {@code null}
+	 * @param fileTypeIndex the file type that appears as selected (zero-based)
+	 * @param fileTypes file types that the dialog can open or save.
+	 *        Two or more strings and {@code null} are required for each filter.
+	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
+	 *        Subsequent strings are the filter patterns (e.g. "*.txt" or "*").
+	 *        {@code null} is required to mark end of filter.
+	 * @return file path(s) that the user selected; an empty array if canceled;
+	 *         or {@code null} on failures (no dialog shown)
+	 *
+	 * @since 3.7
+	 */
+	public native static String[] showFileChooser( Window owner, int dark, boolean open,
+		String title, String okButtonLabel, String currentName, String currentFolder,
+		int optionsSet, int optionsClear, FileChooserCallback callback,
+		int fileTypeIndex, String... fileTypes );
+
+	/** @since 3.7 */
+	public interface FileChooserCallback {
+		boolean approve( String[] files, long hwndFileDialog );
+	}
+
+	/**
+	 * Shows a GTK message box
+	 * <a href="https://docs.gtk.org/gtk3/class.MessageDialog.html">GtkMessageDialog</a>.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param messageType type of message being displayed:
+	 *        {@link JOptionPane#ERROR_MESSAGE}, {@link JOptionPane#INFORMATION_MESSAGE},
+	 *        {@link JOptionPane#WARNING_MESSAGE}, {@link JOptionPane#QUESTION_MESSAGE} or
+	 *        {@link JOptionPane#PLAIN_MESSAGE}
+	 * @param primaryText primary text; if the dialog has a secondary text,
+	 *        this will appear as title in a larger bold font
+	 * @param secondaryText secondary text; shown below of primary text; or {@code null}
+	 * @param defaultButton index of the default button, which can be pressed using ENTER key
+	 * @param buttons texts of the buttons; if no buttons given the a default "OK" button is shown.
+	 *        Use '_' for mnemonics (e.g. "_Choose")
+	 *        Use '__' for '_' character (e.g. "Choose__and__Quit").
+	 * @return index of pressed button; or -1 for ESC key
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageDialog( long hwndParent, int messageType,
+		String primaryText, String secondaryText, int defaultButton, String... buttons );
 }

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

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Rectangle;
 import java.awt.Window;
+import javax.swing.JOptionPane;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -44,7 +45,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeMacLibrary
 {
-	private static int API_VERSION_MACOS = 2001;
+	private static int API_VERSION_MACOS = 2002;
 
 	/**
 	 * Checks whether native library is loaded/available.
@@ -68,4 +69,88 @@ public class FlatNativeMacLibrary
 	/** @since 3.4 */ public native static Rectangle getWindowButtonsBounds( Window window );
 	/** @since 3.4 */ public native static boolean isWindowFullScreen( Window window );
 	/** @since 3.4 */ public native static boolean toggleWindowFullScreen( Window window );
+
+
+	/** @since 3.7 */
+	public static final int
+		// NSOpenPanel (extends NSSavePanel)
+		FC_canChooseFiles					= 1 << 0,  // default
+		FC_canChooseDirectories				= 1 << 1,
+		FC_resolvesAliases					= 1 << 2,  // default
+		FC_allowsMultipleSelection			= 1 << 3,
+		FC_accessoryViewDisclosed			= 1 << 4,
+		// NSSavePanel
+		FC_showsTagField					= 1 << 8,  // default for Save
+		FC_canCreateDirectories				= 1 << 9,  // default for Save
+		FC_canSelectHiddenExtension			= 1 << 10,
+		FC_showsHiddenFiles					= 1 << 11,
+		FC_extensionHidden					= 1 << 12,
+		FC_allowsOtherFileTypes				= 1 << 13,
+		FC_treatsFilePackagesAsDirectories	= 1 << 14,
+		// custom
+		FC_showSingleFilterField			= 1 << 24;
+
+	/**
+	 * Shows the macOS system file dialogs
+	 * <a href="https://developer.apple.com/documentation/appkit/nsopenpanel?language=objc">NSOpenPanel</a> or
+	 * <a href="https://developer.apple.com/documentation/appkit/nssavepanel?language=objc">NSSavePanel</a>.
+	 * <p>
+	 * <b>Note:</b> This method blocks the current thread until the user closes
+	 * the file dialog. It is highly recommended to invoke it from a new thread
+	 * to avoid blocking the AWT event dispatching thread.
+	 *
+	 * @param owner the owner of the file dialog; or {@code null}
+	 * @param dark appearance of the file dialog: {@code 1} = dark, {@code 0} = light, {@code -1} = default
+	 * @param open if {@code true}, shows the open dialog; if {@code false}, shows the save dialog
+	 * @param title text displayed at top of save dialog (not used in open dialog); or {@code null}
+	 * @param prompt text displayed in default button; or {@code null}
+	 * @param message text displayed at top of open/save dialogs; or {@code null}
+	 * @param filterFieldLabel text displayed in front of the filter combobox; or {@code null}
+	 * @param nameFieldLabel text displayed in front of the filename text field in save dialog (not used in open dialog); or {@code null}
+	 * @param nameFieldStringValue user-editable filename currently shown in the name field in save dialog (not used in open dialog); or {@code null}
+	 * @param directoryURL current directory shown in the dialog; or {@code null}
+	 * @param optionsSet options to set; see {@code FC_*} constants
+	 * @param optionsClear options to clear; see {@code FC_*} constants
+	 * @param fileTypeIndex the file type that appears as selected (zero-based)
+	 * @param fileTypes file types that the dialog can open or save.
+	 *        Two or more strings and {@code null} are required for each filter.
+	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
+	 *        Subsequent strings are the filter patterns (e.g. "txt" or "*").
+	 *        {@code null} is required to mark end of filter.
+	 * @return file path(s) that the user selected; an empty array if canceled;
+	 *         or {@code null} on failures (no dialog shown)
+	 *
+	 * @since 3.7
+	 */
+	public native static String[] showFileChooser( Window owner, int dark, boolean open,
+		String title, String prompt, String message, String filterFieldLabel,
+		String nameFieldLabel, String nameFieldStringValue, String directoryURL,
+		int optionsSet, int optionsClear, FileChooserCallback callback,
+		int fileTypeIndex, String... fileTypes );
+
+	/** @since 3.7 */
+	public interface FileChooserCallback {
+		boolean approve( String[] files, long hwndFileDialog );
+	}
+
+	/**
+	 * Shows a macOS alert
+	 * <a href="https://developer.apple.com/documentation/appkit/nsalert?language=objc">NSAlert</a>.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param alertStyle type of alert being displayed:
+	 *        {@link JOptionPane#ERROR_MESSAGE}, {@link JOptionPane#INFORMATION_MESSAGE} or
+	 *        {@link JOptionPane#WARNING_MESSAGE}
+	 * @param messageText main message of the alert
+	 * @param informativeText additional information about the alert; shown below of main message; or {@code null}
+	 * @param defaultButton index of the default button, which can be pressed using ENTER key
+	 * @param buttons texts of the buttons; if no buttons given the a default "OK" button is shown
+	 * @return index of pressed button
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageDialog( long hwndParent, int alertStyle,
+		String messageText, String informativeText, int defaultButton, String... buttons );
 }

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

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
 import java.awt.Window;
+import javax.swing.JOptionPane;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -30,7 +31,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeWindowsLibrary
 {
-	private static int API_VERSION_WINDOWS = 1001;
+	private static int API_VERSION_WINDOWS = 1002;
 
 	private static long osBuildNumber = Long.MIN_VALUE;
 
@@ -158,4 +159,125 @@ public class FlatNativeWindowsLibrary
 		// DwmSetWindowAttribute() expects COLORREF as attribute value, which is defined as DWORD
 		return dwmSetWindowAttributeDWORD( hwnd, attribute, rgb );
 	}
+
+
+	/**
+	 * FILEOPENDIALOGOPTIONS
+	 * see https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/ne-shobjidl_core-_fileopendialogoptions
+	 *
+	 * @since 3.7
+	 */
+	public static final int
+		FOS_OVERWRITEPROMPT = 0x2,		// default for Save
+		FOS_STRICTFILETYPES = 0x4,
+		FOS_NOCHANGEDIR = 0x8,			// default
+		FOS_PICKFOLDERS = 0x20,
+		FOS_FORCEFILESYSTEM = 0x40,
+		FOS_ALLNONSTORAGEITEMS = 0x80,
+		FOS_NOVALIDATE = 0x100,
+		FOS_ALLOWMULTISELECT = 0x200,
+		FOS_PATHMUSTEXIST = 0x800,		// default
+		FOS_FILEMUSTEXIST = 0x1000,		// default for Open
+		FOS_CREATEPROMPT = 0x2000,
+		FOS_SHAREAWARE = 0x4000,
+		FOS_NOREADONLYRETURN = 0x8000,	// default for Save
+		FOS_NOTESTFILECREATE = 0x10000,
+		FOS_HIDEMRUPLACES = 0x20000,
+		FOS_HIDEPINNEDPLACES = 0x40000,
+		FOS_NODEREFERENCELINKS = 0x100000,
+		FOS_OKBUTTONNEEDSINTERACTION = 0x200000,
+		FOS_DONTADDTORECENT = 0x2000000,
+		FOS_FORCESHOWHIDDEN = 0x10000000,
+		FOS_DEFAULTNOMINIMODE = 0x20000000,
+		FOS_FORCEPREVIEWPANEON = 0x40000000,
+		FOS_SUPPORTSTREAMABLEITEMS = 0x80000000;
+
+	/**
+	 * Shows the Windows system
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/shell/common-file-dialog">file dialogs</a>
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-ifileopendialog">IFileOpenDialog</a> or
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-ifilesavedialog">IFileSaveDialog</a>.
+	 * <p>
+	 * <b>Note:</b> This method blocks the current thread until the user closes
+	 * the file dialog. It is highly recommended to invoke it from a new thread
+	 * to avoid blocking the AWT event dispatching thread.
+	 *
+	 * @param owner the owner of the file dialog; or {@code null}
+	 * @param open if {@code true}, shows the open dialog; if {@code false}, shows the save dialog
+	 * @param title text displayed in dialog title; or {@code null}
+	 * @param okButtonLabel text displayed in default button; or {@code null}.
+	 *        Use '&amp;' for mnemonics (e.g. "&amp;Choose").
+	 *        Use '&amp;&amp;' for '&amp;' character (e.g. "Choose &amp;&amp; Quit").
+	 * @param fileNameLabel text displayed in front of the filename text field; or {@code null}
+	 * @param fileName user-editable filename currently shown in the filename field; or {@code null}
+	 * @param folder current directory shown in the dialog; or {@code null}
+	 * @param saveAsItem file to be used as the initial entry in a Save As dialog; or {@code null}.
+	 *        File name is shown in filename text field, folder is selected in view.
+	 *        To be used for saving files that already exist. For new files use {@code fileName}.
+	 * @param defaultFolder folder used as a default if there is not a recently used folder value available; or {@code null}.
+	 *        Windows somewhere stores default folder on a per-app basis.
+	 *        So this is probably used only once when the app opens a file dialog for first time.
+	 * @param defaultExtension default extension to be added to file name in save dialog; or {@code null}
+	 * @param optionsSet options to set; see {@code FOS_*} constants
+	 * @param optionsClear options to clear; see {@code FOS_*} constants
+	 * @param callback approve callback; or {@code null}
+	 * @param fileTypeIndex the file type that appears as selected (zero-based)
+	 * @param fileTypes file types that the dialog can open or save.
+	 *        Pairs of strings are required for each filter.
+	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
+	 *        Second string is the filter pattern (e.g. "*.txt", "*.exe;*.dll" or "*.*").
+	 * @return file path(s) that the user selected; an empty array if canceled;
+	 *         or {@code null} on failures (no dialog shown)
+	 *
+	 * @since 3.7
+	 */
+	public native static String[] showFileChooser( Window owner, boolean open,
+		String title, String okButtonLabel, String fileNameLabel, String fileName,
+		String folder, String saveAsItem, String defaultFolder, String defaultExtension,
+		int optionsSet, int optionsClear, FileChooserCallback callback,
+		int fileTypeIndex, String... fileTypes );
+
+	/** @since 3.7 */
+	public interface FileChooserCallback {
+		boolean approve( String[] files, long hwndFileDialog );
+	}
+
+	/**
+	 * Shows a modal Windows message dialog.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param messageType type of message being displayed:
+	 *        {@link JOptionPane#ERROR_MESSAGE}, {@link JOptionPane#INFORMATION_MESSAGE},
+	 *        {@link JOptionPane#WARNING_MESSAGE}, {@link JOptionPane#QUESTION_MESSAGE} or
+	 *        {@link JOptionPane#PLAIN_MESSAGE}
+	 * @param title dialog box title; or {@code null} to use title from parent window
+	 * @param text message to be displayed
+	 * @param defaultButton index of the default button, which can be pressed using ENTER key
+	 * @param buttons texts of the buttons.
+	 *        Use '&amp;' for mnemonics (e.g. "&amp;Choose").
+	 *        Use '&amp;&amp;' for '&amp;' character (e.g. "Choose &amp;&amp; Quit").
+	 * @return index of pressed button; or -1 for ESC key
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageDialog( long hwndParent, int messageType,
+		String title, String text, int defaultButton, String... buttons );
+
+	/**
+	 * Shows a Windows message box
+	 * <a href="https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox">MessageBox</a>.
+	 * <p>
+	 * For use in {@link FileChooserCallback} only.
+	 *
+	 * @param hwndParent the parent of the message box
+	 * @param text message to be displayed
+	 * @param caption dialog box title
+	 * @param type see <a href="https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox#parameters">MessageBox parameter uType</a>
+	 * @return see <a href="https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox#return-value">MessageBox Return value</a>
+	 *
+	 * @since 3.7
+	 */
+	public native static int showMessageBox( long hwndParent, String text, String caption, int type );
 }

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

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf.ui;
 
-import java.awt.Color;
 import java.awt.Graphics;
 import java.awt.Rectangle;
 import java.awt.Toolkit;
@@ -41,8 +40,8 @@ import javax.swing.text.JTextComponent;
 import javax.swing.text.PasswordView;
 import javax.swing.text.View;
 import com.formdev.flatlaf.FlatClientProperties;
-import com.formdev.flatlaf.icons.FlatCapsLockIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -215,12 +214,12 @@ public class FlatPasswordFieldUI
 	/** @since 2 */
 	@Override
 	protected Object applyStyleProperty( String key, Object value ) {
-		if( key.equals( "capsLockIconColor" ) && capsLockIcon instanceof FlatCapsLockIcon ) {
+		if( key.startsWith( "capsLockIcon" ) && capsLockIcon instanceof StyleableObject ) {
 			if( capsLockIconShared ) {
 				capsLockIcon = FlatStylingSupport.cloneIcon( capsLockIcon );
 				capsLockIconShared = false;
 			}
-			return ((FlatCapsLockIcon)capsLockIcon).applyStyleProperty( key, value );
+			return ((StyleableObject)capsLockIcon).applyStyleProperty( key, value );
 		}
 
 		return super.applyStyleProperty( key, value );
@@ -230,14 +229,15 @@ public class FlatPasswordFieldUI
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
 		Map<String, Class<?>> infos = super.getStyleableInfos( c );
-		infos.put( "capsLockIconColor", Color.class );
+		if( capsLockIcon instanceof StyleableObject )
+			infos.putAll( ((StyleableObject)capsLockIcon).getStyleableInfos() );
 		return infos;
 	}
 
 	@Override
 	public Object getStyleableValue( JComponent c, String key ) {
-		if( key.equals( "capsLockIconColor" ) && capsLockIcon instanceof FlatCapsLockIcon )
-			return ((FlatCapsLockIcon)capsLockIcon).getStyleableValue( key );
+		if( key.startsWith( "capsLockIcon" ) && capsLockIcon instanceof StyleableObject )
+			return ((StyleableObject)capsLockIcon).getStyleableValue( key );
 
 		return super.getStyleableValue( c, key );
 	}

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

@@ -108,10 +108,8 @@ public class FlatPopupFactory
 			}
 		}
 
-		boolean forceHeavyWeight = isOptionEnabled( owner, contents, FlatClientProperties.POPUP_FORCE_HEAVY_WEIGHT, "Popup.forceHeavyWeight" );
-
 		if( !isOptionEnabled( owner, contents, FlatClientProperties.POPUP_DROP_SHADOW_PAINTED, "Popup.dropShadowPainted" ) || SystemInfo.isProjector || SystemInfo.isWebswing )
-			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), owner, contents );
+			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, isForceHeavyWeight( owner, contents, x, y ) ), owner, contents );
 
 		// macOS and Linux adds drop shadow to heavy weight popups
 		if( SystemInfo.isMacOS || SystemInfo.isLinux ) {
@@ -131,12 +129,8 @@ public class FlatPopupFactory
 			return popup;
 		}
 
-		// check whether popup overlaps a heavy weight component
-		if( !forceHeavyWeight && overlapsHeavyWeightComponent( owner, contents, x, y ) )
-			forceHeavyWeight = true;
-
 		// create drop shadow popup
-		Popup popupForScreenOfOwner = getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight );
+		Popup popupForScreenOfOwner = getPopupForScreenOfOwner( owner, contents, x, y, isForceHeavyWeight( owner, contents, x, y ) );
 		GraphicsConfiguration gc = (owner != null) ? owner.getGraphicsConfiguration() : null;
 		return (gc != null && gc.isTranslucencyCapable())
 			? new DropShadowPopup( popupForScreenOfOwner, owner, contents )
@@ -226,6 +220,11 @@ public class FlatPopupFactory
 		}
 	}
 
+	private static boolean isForceHeavyWeight( Component owner, Component contents, int x, int y ) {
+		boolean forceHeavyWeight = isOptionEnabled( owner, contents, FlatClientProperties.POPUP_FORCE_HEAVY_WEIGHT, "Popup.forceHeavyWeight" );
+		return forceHeavyWeight || hasVisibleGlassPane( owner ) || overlapsHeavyWeightComponent( owner, contents, x, y );
+	}
+
 	private static boolean isOptionEnabled( Component owner, Component contents, String clientKey, String uiKey ) {
 		Object value = getOption( owner, contents, clientKey, uiKey );
 		return (value instanceof Boolean) ? (Boolean) value : false;
@@ -469,6 +468,18 @@ public class FlatPopupFactory
 
 	//---- fixes --------------------------------------------------------------
 
+	private static boolean hasVisibleGlassPane( Component owner ) {
+		if( owner == null )
+			return false;
+
+		Window window = SwingUtilities.windowForComponent( owner );
+		if( !(window instanceof RootPaneContainer) )
+			return false;
+
+		Component glassPane = ((RootPaneContainer)window).getGlassPane();
+		return (glassPane != null && glassPane.isVisible());
+	}
+
 	private static boolean overlapsHeavyWeightComponent( Component owner, Component contents, int x, int y ) {
 		if( owner == null )
 			return false;

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

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

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

@@ -45,6 +45,7 @@ import javax.swing.plaf.basic.BasicRadioButtonUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.icons.FlatCheckBoxIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.HiDPIUtils;
@@ -203,16 +204,17 @@ public class FlatRadioButtonUI
 	protected Object applyStyleProperty( AbstractButton b, String key, Object value ) {
 		// style icon
 		if( key.startsWith( "icon." ) ) {
-			if( !(icon instanceof FlatCheckBoxIcon) )
-				return new UnknownStyleException( key );
+			Icon icon = getRealIcon( b );
+			if( !(icon instanceof StyleableObject) )
+				throw new UnknownStyleException( key );
 
-			if( iconShared ) {
-				icon = FlatStylingSupport.cloneIcon( icon );
+			if( icon == this.icon && iconShared ) {
+				this.icon = icon = FlatStylingSupport.cloneIcon( icon );
 				iconShared = false;
 			}
 
 			key = key.substring( "icon.".length() );
-			return ((FlatCheckBoxIcon)icon).applyStyleProperty( key, value );
+			return ((StyleableObject)icon).applyStyleProperty( key, value );
 		}
 
 		if( "iconTextGap".equals( key ) && value instanceof Integer )
@@ -225,10 +227,9 @@ public class FlatRadioButtonUI
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
 		Map<String, Class<?>> infos = FlatStylingSupport.getAnnotatedStyleableInfos( this );
-		if( icon instanceof FlatCheckBoxIcon ) {
-			for( Map.Entry<String, Class<?>> e : ((FlatCheckBoxIcon)icon).getStyleableInfos().entrySet() )
-				infos.put( "icon.".concat( e.getKey() ), e.getValue() );
-		}
+		Icon icon = getRealIcon( c );
+		if( icon instanceof StyleableObject )
+			FlatStylingSupport.putAllPrefixKey( infos, "icon.", ((StyleableObject)icon).getStyleableInfos() );
 		return infos;
 	}
 
@@ -237,8 +238,9 @@ public class FlatRadioButtonUI
 	public Object getStyleableValue( JComponent c, String key ) {
 		// style icon
 		if( key.startsWith( "icon." ) ) {
-			return (icon instanceof FlatCheckBoxIcon)
-				? ((FlatCheckBoxIcon)icon).getStyleableValue( key.substring( "icon.".length() ) )
+			Icon icon = getRealIcon( c );
+			return (icon instanceof StyleableObject)
+				? ((StyleableObject)icon).getStyleableValue( key.substring( "icon.".length() ) )
 				: null;
 		}
 
@@ -332,16 +334,18 @@ public class FlatRadioButtonUI
 	}
 
 	private int getIconFocusWidth( JComponent c ) {
-		AbstractButton b = (AbstractButton) c;
-		Icon icon = b.getIcon();
-		if( icon == null )
-			icon = getDefaultIcon();
-
+		Icon icon = getRealIcon( c );
 		return (icon instanceof FlatCheckBoxIcon)
 			? Math.round( UIScale.scale( ((FlatCheckBoxIcon)icon).getFocusWidth() ) )
 			: 0;
 	}
 
+	private Icon getRealIcon( JComponent c ) {
+		AbstractButton b = (AbstractButton) c;
+		Icon icon = b.getIcon();
+		return (icon != null) ? icon : getDefaultIcon();
+	}
+
 	@Override
 	public int getBaseline( JComponent c, int width, int height ) {
 		return FlatButtonUI.getBaselineImpl( c, width, height );

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

@@ -227,7 +227,13 @@ public class FlatSliderUI
 
 	/** @since 2 */
 	protected void applyStyle( Object style ) {
+		Dimension oldThumbSize = thumbSize;
+		int oldFocusWidth = focusWidth;
+
 		oldStyleValues = FlatStylingSupport.parseAndApply( oldStyleValues, style, this::applyStyleProperty );
+
+		if( !thumbSize.equals( oldThumbSize ) || focusWidth != oldFocusWidth )
+			calculateGeometry();
 	}
 
 	/** @since 2 */

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

@@ -51,6 +51,9 @@ import com.formdev.flatlaf.util.StringUtils;
  */
 public class FlatStylingSupport
 {
+
+	//---- annotations --------------------------------------------------------
+
 	/**
 	 * Indicates that a field is intended to be used by FlatLaf styling support.
 	 * <p>
@@ -98,17 +101,56 @@ public class FlatStylingSupport
 	}
 
 
+	//---- interfaces ---------------------------------------------------------
+
 	/** @since 2 */
 	public interface StyleableUI {
 		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() throws IllegalArgumentException;
-		/** @since 2.5 */ Object getStyleableValue( String key ) throws IllegalArgumentException;
+	/**
+	 * An object that implements this interface is intended to support FlatLaf styling.
+	 *
+	 * @since 3.7
+	 */
+	public interface StyleableObject {
+		/**
+		 * Applies the given value to this object.
+		 * <p>
+		 * The default implementation invokes {@link FlatStylingSupport#applyToAnnotatedObject(Object, String, Object)}.
+		 *
+		 * @param key the name of the property
+		 * @param value the new value
+		 * @return the old value of the property
+		 */
+		default Object applyStyleProperty( String key, Object value )
+			throws UnknownStyleException, IllegalArgumentException
+		{
+			return applyToAnnotatedObject( this, key, value );
+		}
+
+		/**
+		 * Returns a map of all styleable properties.
+		 * The key is the name of the property and the value the type of the property.
+		 * <p>
+		 * The default implementation invokes {@link FlatStylingSupport#getAnnotatedStyleableInfos(Object)}.
+		 */
+		default Map<String, Class<?>> getStyleableInfos() throws IllegalArgumentException {
+			return getAnnotatedStyleableInfos( this );
+		}
+
+		/**
+		 * Returns the current value for the given property key.
+		 * <p>
+		 * The default implementation invokes {@link FlatStylingSupport#getAnnotatedStyleableValue(Object, String)}.
+		 *
+		 * @param key the name of the property
+		 * @return the current value of the property
+		 */
+		default Object getStyleableValue( String key ) throws IllegalArgumentException {
+			return getAnnotatedStyleableValue( this, key );
+		}
 	}
 
 	/** @since 2.5 */
@@ -117,6 +159,8 @@ public class FlatStylingSupport
 	}
 
 
+	//---- methods ------------------------------------------------------------
+
 	/**
 	 * Returns the style specified in client property {@link FlatClientProperties#STYLE}.
 	 */
@@ -675,7 +719,7 @@ public class FlatStylingSupport
 		} catch( UnknownStyleException ex ) {
 			// apply to border
 			Border border = c.getBorder();
-			if( border instanceof StyleableBorder ) {
+			if( border instanceof StyleableObject ) {
 				if( borderShared.get() ) {
 					border = cloneBorder( border );
 					c.setBorder( border );
@@ -683,7 +727,7 @@ public class FlatStylingSupport
 				}
 
 				try {
-					return ((StyleableBorder)border).applyStyleProperty( key, value );
+					return ((StyleableObject)border).applyStyleProperty( key, value );
 				} catch( UnknownStyleException ex2 ) {
 					// ignore
 				}
@@ -833,8 +877,8 @@ public class FlatStylingSupport
 	}
 
 	public static void collectStyleableInfos( Border border, Map<String, Class<?>> infos ) {
-		if( border instanceof StyleableBorder )
-			infos.putAll( ((StyleableBorder)border).getStyleableInfos() );
+		if( border instanceof StyleableObject )
+			infos.putAll( ((StyleableObject)border).getStyleableInfos() );
 	}
 
 	public static void putAllPrefixKey( Map<String, Class<?>> infos, String keyPrefix, Map<String, Class<?>> infos2 ) {
@@ -882,8 +926,8 @@ public class FlatStylingSupport
 	}
 
 	public static Object getAnnotatedStyleableValue( Object obj, Border border, String key ) {
-		if( border instanceof StyleableBorder ) {
-			Object value = ((StyleableBorder)border).getStyleableValue( key );
+		if( border instanceof StyleableObject ) {
+			Object value = ((StyleableObject)border).getStyleableValue( key );
 			if( value != null )
 				return value;
 		}

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

@@ -92,8 +92,8 @@ import javax.swing.text.JTextComponent;
 import javax.swing.text.View;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
-import com.formdev.flatlaf.icons.FlatTabbedPaneCloseIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableObject;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.Animator;
@@ -205,6 +205,7 @@ public class FlatTabbedPaneUI
 	protected static final int WIDTH_MODE_PREFERRED = 0;
 	protected static final int WIDTH_MODE_EQUAL = 1;
 	protected static final int WIDTH_MODE_COMPACT = 2;
+	/** @since 3.7 */ protected static final int WIDTH_MODE_ICON_ONLY = 3;
 
 	// tab rotation
 	/** @since 3.3 */ protected static final int NONE = -1;
@@ -670,15 +671,15 @@ public class FlatTabbedPaneUI
 	protected Object applyStyleProperty( String key, Object value ) {
 		// close icon
 		if( key.startsWith( "close" ) ) {
-			if( !(closeIcon instanceof FlatTabbedPaneCloseIcon) )
-				return new UnknownStyleException( key );
+			if( !(closeIcon instanceof StyleableObject) )
+				throw new UnknownStyleException( key );
 
 			if( closeIconShared ) {
 				closeIcon = FlatStylingSupport.cloneIcon( closeIcon );
 				closeIconShared = false;
 			}
 
-			return ((FlatTabbedPaneCloseIcon)closeIcon).applyStyleProperty( key, value );
+			return ((StyleableObject)closeIcon).applyStyleProperty( key, value );
 		}
 
 		if( value instanceof String ) {
@@ -720,8 +721,8 @@ public class FlatTabbedPaneUI
 		infos.put( "tabAreaInsets", Insets.class );
 		infos.put( "textIconGap", int.class );
 		FlatStylingSupport.collectAnnotatedStyleableInfos( this, infos );
-		if( closeIcon instanceof FlatTabbedPaneCloseIcon )
-			infos.putAll( ((FlatTabbedPaneCloseIcon)closeIcon).getStyleableInfos() );
+		if( closeIcon instanceof StyleableObject )
+			infos.putAll( ((StyleableObject)closeIcon).getStyleableInfos() );
 		return infos;
 	}
 
@@ -730,8 +731,8 @@ public class FlatTabbedPaneUI
 	public Object getStyleableValue( JComponent c, String key ) {
 		// close icon
 		if( key.startsWith( "close" ) ) {
-			return (closeIcon instanceof FlatTabbedPaneCloseIcon)
-				? ((FlatTabbedPaneCloseIcon)closeIcon).getStyleableValue( key )
+			return (closeIcon instanceof StyleableObject)
+				? ((StyleableObject)closeIcon).getStyleableValue( key )
 				: null;
 		}
 
@@ -780,6 +781,7 @@ public class FlatTabbedPaneUI
 					case WIDTH_MODE_PREFERRED:	return TABBED_PANE_TAB_WIDTH_MODE_PREFERRED;
 					case WIDTH_MODE_EQUAL:		return TABBED_PANE_TAB_WIDTH_MODE_EQUAL;
 					case WIDTH_MODE_COMPACT:	return TABBED_PANE_TAB_WIDTH_MODE_COMPACT;
+					case WIDTH_MODE_ICON_ONLY:	return TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY;
 				}
 
 			case "tabRotation":
@@ -926,9 +928,10 @@ public class FlatTabbedPaneUI
 
 		int tabWidth;
 		Icon icon;
-		if( tabWidthMode == WIDTH_MODE_COMPACT &&
-			tabIndex != tabPane.getSelectedIndex() &&
-			isHorizontalOrRotated( tabPlacement ) &&
+		if( ((tabWidthMode == WIDTH_MODE_COMPACT &&
+			  tabIndex != tabPane.getSelectedIndex() &&
+			  isHorizontalOrRotated( tabPlacement )) ||
+			 tabWidthMode == WIDTH_MODE_ICON_ONLY) &&
 			tabPane.getTabComponentAt( tabIndex ) == null &&
 			(icon = getIconForTab( tabIndex )) != null )
 		{
@@ -1247,7 +1250,8 @@ public class FlatTabbedPaneUI
 		Font font = tabPane.getFont();
 		FontMetrics metrics = tabPane.getFontMetrics( font );
 		boolean isCompact = (icon != null && !isSelected && getTabWidthMode() == WIDTH_MODE_COMPACT && isHorizontalOrRotated( tabPlacement ));
-		if( isCompact )
+		boolean isIconOnly = (icon != null && getTabWidthMode() == WIDTH_MODE_ICON_ONLY);
+		if( isCompact || isIconOnly )
 			title = null;
 		String clippedTitle = layoutAndClipLabel( tabPlacement, metrics, tabIndex, title, icon, tabRect, iconRect, textRect, isSelected );
 
@@ -1283,7 +1287,7 @@ debug*/
 		}
 
 		// paint title and icon
-		if( !isCompact )
+		if( !isCompact || isIconOnly )
 			paintText( g, tabPlacement, font, metrics, tabIndex, clippedTitle, textRect, isSelected );
 		paintIcon( g, tabPlacement, tabIndex, icon, iconRect, isSelected );
 	}
@@ -2160,6 +2164,7 @@ debug*/
 			case TABBED_PANE_TAB_WIDTH_MODE_PREFERRED:	return WIDTH_MODE_PREFERRED;
 			case TABBED_PANE_TAB_WIDTH_MODE_EQUAL:		return WIDTH_MODE_EQUAL;
 			case TABBED_PANE_TAB_WIDTH_MODE_COMPACT:	return WIDTH_MODE_COMPACT;
+			case TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY:	return WIDTH_MODE_ICON_ONLY;
 		}
 	}
 
@@ -2508,7 +2513,7 @@ debug*/
 			//   2. text of label or text component in custom tab component (including children)
 			//   3. accessible name of tab
 			//   4. accessible name of custom tab component (including children)
-			//   5. string "n. Tab"
+			//   5. string "n. Tab", if tab does not have an icon
 			String title = tabPane.getTitleAt( tabIndex );
 			if( StringUtils.isEmpty( title ) ) {
 				Component tabComp = tabPane.getTabComponentAt( tabIndex );
@@ -2518,7 +2523,7 @@ debug*/
 					title = tabPane.getAccessibleContext().getAccessibleChild( tabIndex ).getAccessibleContext().getAccessibleName();
 				if( StringUtils.isEmpty( title ) && tabComp instanceof Accessible )
 					title = findTabTitleInAccessible( (Accessible) tabComp );
-				if( StringUtils.isEmpty( title ) )
+				if( StringUtils.isEmpty( title ) && tabPane.getIconAt( tabIndex ) == null )
 					title = (tabIndex + 1) + ". Tab";
 			}
 
@@ -2539,6 +2544,12 @@ debug*/
 			if( !tabPane.isEnabled() || !tabPane.isEnabledAt( tabIndex ) )
 				menuItem.setEnabled( false );
 
+			// make menu item smaller if it contains icon only
+			if( StringUtils.isEmpty( title ) ) {
+				menuItem.putClientProperty( FlatClientProperties.STYLE,
+					"minimumWidth: 0; textNoAcceleratorGap: 0; acceleratorArrowGap: 0" );
+			}
+
 			menuItem.addActionListener( e -> selectTab( tabIndex ) );
 			return menuItem;
 		}
@@ -2707,8 +2718,13 @@ debug*/
 
 			// because this listener receives mouse events for the whole tabbed pane,
 			// we have to check whether the mouse is located over the viewport
-			if( !isInViewport( e.getX(), e.getY() ) )
+			if( !isInViewport( e.getX(), e.getY() ) ) {
+				// if it is not in the viewport, retarget the event to a parent container
+				// which might support scrolling (e.g. a surrounding ScrollPane)
+				Container parent = tabPane.getParent();
+				parent.dispatchEvent( SwingUtilities.convertMouseEvent( tabPane, e, parent ) );
 				return;
+			}
 
 			lastMouseX = e.getX();
 			lastMouseY = e.getY();

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

@@ -34,7 +34,6 @@ import java.awt.event.ComponentListener;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import java.awt.geom.Rectangle2D;
-import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
 import javax.swing.Action;
@@ -66,6 +65,7 @@ import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.icons.FlatCheckBoxIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.ui.FlatUIUtils.FlatPropertyWatcher;
 import com.formdev.flatlaf.util.Graphics2DProxy;
 import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
@@ -189,29 +189,26 @@ public class FlatTableUI
 		if( rowHeight > 0 )
 			LookAndFeel.installProperty( table, "rowHeight", UIScale.scale( rowHeight ) );
 
-		FlatTablePropertyWatcher watcher = FlatTablePropertyWatcher.get( table );
-		if( watcher != null )
-			watcher.enabled = false;
-
-		if( !showHorizontalLines && (watcher == null || !watcher.showHorizontalLinesChanged) ) {
-			oldShowHorizontalLines = table.getShowHorizontalLines();
-			table.setShowHorizontalLines( false );
+		if( !showHorizontalLines ) {
+			FlatPropertyWatcher.runIfNotChanged( table, "showHorizontalLines", () -> {
+				oldShowHorizontalLines = table.getShowHorizontalLines();
+				table.setShowHorizontalLines( false );
+			} );
 		}
-		if( !showVerticalLines && (watcher == null || !watcher.showVerticalLinesChanged) ) {
-			oldShowVerticalLines = table.getShowVerticalLines();
-			table.setShowVerticalLines( false );
+		if( !showVerticalLines ) {
+			FlatPropertyWatcher.runIfNotChanged( table, "showVerticalLines", () -> {
+				oldShowVerticalLines = table.getShowVerticalLines();
+				table.setShowVerticalLines( false );
+			} );
 		}
 
-		if( intercellSpacing != null && (watcher == null || !watcher.intercellSpacingChanged) ) {
-			oldIntercellSpacing = table.getIntercellSpacing();
-			table.setIntercellSpacing( intercellSpacing );
+		if( intercellSpacing != null ) {
+			FlatPropertyWatcher.runIfNotChanged( table, "rowMargin", () -> {
+				oldIntercellSpacing = table.getIntercellSpacing();
+				table.setIntercellSpacing( intercellSpacing );
+			} );
 		}
 
-		if( watcher != null )
-			watcher.enabled = true;
-		else
-			table.addPropertyChangeListener( new FlatTablePropertyWatcher() );
-
 		// install boolean renderer
 		oldBooleanRenderer = table.getDefaultRenderer( Boolean.class );
 		if( oldBooleanRenderer instanceof UIResource )
@@ -231,25 +228,24 @@ public class FlatTableUI
 
 		oldStyleValues = null;
 
-		FlatTablePropertyWatcher watcher = FlatTablePropertyWatcher.get( table );
-		if( watcher != null )
-			watcher.enabled = false;
-
 		// restore old show horizontal/vertical lines (if not modified)
-		if( !showHorizontalLines && oldShowHorizontalLines && !table.getShowHorizontalLines() &&
-			(watcher == null || !watcher.showHorizontalLinesChanged) )
-		  table.setShowHorizontalLines( true );
-		if( !showVerticalLines && oldShowVerticalLines && !table.getShowVerticalLines() &&
-			(watcher == null || !watcher.showVerticalLinesChanged) )
-		  table.setShowVerticalLines( true );
+		if( !showHorizontalLines && oldShowHorizontalLines && !table.getShowHorizontalLines() ) {
+			FlatPropertyWatcher.runIfNotChanged( table, "showHorizontalLines", () -> {
+				table.setShowHorizontalLines( true );
+			} );
+		}
+		if( !showVerticalLines && oldShowVerticalLines && !table.getShowVerticalLines() ) {
+			FlatPropertyWatcher.runIfNotChanged( table, "showVerticalLines", () -> {
+				table.setShowVerticalLines( true );
+			} );
+		}
 
 		// restore old intercell spacing (if not modified)
-		if( intercellSpacing != null && table.getIntercellSpacing().equals( intercellSpacing ) &&
-			(watcher == null || !watcher.intercellSpacingChanged) )
-		  table.setIntercellSpacing( oldIntercellSpacing );
-
-		if( watcher != null )
-			watcher.enabled = true;
+		if( intercellSpacing != null && table.getIntercellSpacing().equals( intercellSpacing ) ) {
+			FlatPropertyWatcher.runIfNotChanged( table, "rowMargin", () -> {
+				table.setIntercellSpacing( oldIntercellSpacing );
+			} );
+		}
 
 		// uninstall boolean renderer
 		if( table.getDefaultRenderer( Boolean.class ) instanceof FlatBooleanRenderer ) {
@@ -938,48 +934,6 @@ public class FlatTableUI
 		}
 	}
 
-	//---- class FlatTablePropertyWatcher -------------------------------------
-
-	/**
-	 * Listener that watches for change of some table properties from application code.
-	 * This information is used in {@link FlatTableUI#installDefaults()} and
-	 * {@link FlatTableUI#uninstallDefaults()} to decide whether FlatLaf modifies those properties.
-	 * If they are modified in application code, FlatLaf no longer changes them.
-	 *
-	 * The listener is added once for each table, but never removed.
-	 * So switching Laf/theme reuses existing listener.
-	 */
-	private static class FlatTablePropertyWatcher
-		implements PropertyChangeListener
-	{
-		boolean enabled = true;
-		boolean showHorizontalLinesChanged;
-		boolean showVerticalLinesChanged;
-		boolean intercellSpacingChanged;
-
-		static FlatTablePropertyWatcher get( JTable table ) {
-			for( PropertyChangeListener l : table.getPropertyChangeListeners() ) {
-				if( l instanceof FlatTablePropertyWatcher )
-					return (FlatTablePropertyWatcher) l;
-			}
-			return null;
-		}
-
-		//---- interface PropertyChangeListener ----
-
-		@Override
-		public void propertyChange( PropertyChangeEvent e ) {
-			if( !enabled )
-				return;
-
-			switch( e.getPropertyName() ) {
-				case "showHorizontalLines":	showHorizontalLinesChanged = true; break;
-				case "showVerticalLines":	showVerticalLinesChanged = true; break;
-				case "rowMargin":			intercellSpacingChanged = true; break;
-			}
-		}
-	}
-
 	//---- class FlatBooleanRenderer ------------------------------------------
 
 	private static class FlatBooleanRenderer

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

@@ -628,7 +628,7 @@ debug*/
 	/**
 	 * Returns the rectangle used to paint leading and trailing icons.
 	 * It invokes {@code super.getVisibleEditorRect()} and reduces left and/or
-	 * right margin if the text field has leading or trailing icons or components.
+	 * right insets if the text field has leading or trailing icons or components.
 	 * Also, the preferred widths of leading and trailing components are removed.
 	 *
 	 * @since 2
@@ -660,24 +660,24 @@ debug*/
 			}
 		}
 
-		// if a leading/trailing icons (or components) are shown, then the left/right margins are reduced
-		// to the top margin, which places the icon nicely centered on left/right side
+		// if a leading/trailing icons (or components) are shown, then the left/right insets are reduced
+		// to the top inset, which places the icon nicely centered on left/right side
 		if( leftVisible || (ltr ? hasLeadingIcon() : hasTrailingIcon()) ) {
-			// reduce left margin
-			Insets margin = getComponent().getMargin();
-			int newLeftMargin = Math.min( margin.left, margin.top );
-			if( newLeftMargin < margin.left ) {
-				int diff = scale( margin.left - newLeftMargin );
+			// reduce left inset
+			Insets insets = getComponent().getInsets();
+			int newLeftInset = Math.min( insets.left, insets.top );
+			if( newLeftInset < insets.left ) {
+				int diff = insets.left - newLeftInset;
 				r.x -= diff;
 				r.width += diff;
 			}
 		}
 		if( rightVisible || (ltr ? hasTrailingIcon() : hasLeadingIcon()) ) {
-			// reduce right margin
-			Insets margin = getComponent().getMargin();
-			int newRightMargin = Math.min( margin.right, margin.top );
-			if( newRightMargin < margin.left )
-				r.width += scale( margin.right - newRightMargin );
+			// reduce right inset
+			Insets insets = getComponent().getInsets();
+			int newRightInset = Math.min( insets.right, insets.top );
+			if( newRightInset < insets.left )
+				r.width += insets.right - newRightInset;
 		}
 
 		// make sure that width and height are not negative

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

@@ -484,7 +484,7 @@ public class FlatTitlePane
 	}
 
 	protected void frameStateChanged() {
-		if( window == null || rootPane.getWindowDecorationStyle() != JRootPane.FRAME )
+		if( window == null || rootPane.getWindowDecorationStyle() == JRootPane.NONE )
 			return;
 
 		updateVisibility();

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

@@ -47,6 +47,7 @@ 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.ui.FlatUIUtils.FlatPropertyWatcher;
 import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
@@ -144,11 +145,13 @@ public class FlatToolBarUI
 		hoverButtonGroupBackground = UIManager.getColor( "ToolBar.hoverButtonGroupBackground" );
 
 		// floatable
+		oldFloatable = null;
 		if( !UIManager.getBoolean( "ToolBar.floatable" ) ) {
-			oldFloatable = toolBar.isFloatable();
-			toolBar.setFloatable( false );
-		} else
-			oldFloatable = null;
+			FlatPropertyWatcher.runIfNotChanged( toolBar, "floatable", () -> {
+				oldFloatable = toolBar.isFloatable();
+				toolBar.setFloatable( false );
+			} );
+		}
 	}
 
 	@Override
@@ -158,7 +161,9 @@ public class FlatToolBarUI
 		hoverButtonGroupBackground = null;
 
 		if( oldFloatable != null ) {
-			toolBar.setFloatable( oldFloatable );
+			FlatPropertyWatcher.runIfNotChanged( toolBar, "floatable", () -> {
+				toolBar.setFloatable( oldFloatable );
+			} );
 			oldFloatable = null;
 		}
 	}

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

@@ -44,6 +44,8 @@ import java.awt.geom.Path2D;
 import java.awt.geom.Point2D;
 import java.awt.geom.Rectangle2D;
 import java.awt.geom.RoundRectangle2D;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
 import java.util.IdentityHashMap;
 import java.util.WeakHashMap;
 import java.util.function.Predicate;
@@ -474,6 +476,9 @@ public class FlatUIUtils
 	 * Returns the scaled arc diameter of the border for the given component.
 	 */
 	public static float getBorderArc( JComponent c ) {
+		if( c.getBorder() instanceof FlatLineBorder )
+			return UIScale.scale( ((FlatLineBorder)c.getBorder()).getArc() );
+
 		FlatBorder border = getOutsideFlatBorder( c );
 		return (border != null)
 			? UIScale.scale( (float) border.getArc( c ) )
@@ -1410,4 +1415,47 @@ debug*/
 			return delegate.isBorderOpaque();
 		}
 	}
+
+	//---- class FlatPropertyWatcher ------------------------------------------
+
+	/**
+	 * Listener that watches for change of a property from application code.
+	 * This information can be used to decide whether FlatLaf modifies the property.
+	 * If it is modified in application code, FlatLaf no longer changes it.
+	 * <p>
+	 * The listener is added once for a property, but never removed.
+	 * So switching Laf/theme reuses existing listener.
+	 */
+	static class FlatPropertyWatcher
+		implements PropertyChangeListener
+	{
+		private boolean changed;
+
+		static void runIfNotChanged( JComponent c, String propName, Runnable runnable ) {
+			FlatPropertyWatcher watcher = getOrInstall( c, propName );
+			if( watcher.changed )
+				return;
+
+			runnable.run();
+			watcher.changed = false;
+		}
+
+		private static FlatPropertyWatcher getOrInstall( JComponent c, String propName ) {
+			for( PropertyChangeListener l : c.getPropertyChangeListeners( propName ) ) {
+				if( l instanceof FlatPropertyWatcher )
+					return (FlatPropertyWatcher) l;
+			}
+
+			FlatPropertyWatcher watcher = new FlatPropertyWatcher();
+			c.addPropertyChangeListener( propName, watcher );
+			return watcher;
+		}
+
+		//---- interface PropertyChangeListener ----
+
+		@Override
+		public void propertyChange( PropertyChangeEvent e ) {
+			changed = true;
+		}
+	}
 }

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

@@ -27,7 +27,9 @@ import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.beans.PropertyChangeSupport;
 import java.lang.reflect.Method;
+import java.util.Arrays;
 import javax.swing.LookAndFeel;
+import javax.swing.UIDefaults;
 import javax.swing.UIManager;
 import javax.swing.plaf.DimensionUIResource;
 import javax.swing.plaf.FontUIResource;
@@ -61,16 +63,28 @@ import com.formdev.flatlaf.FlatSystemProperties;
  * or if the default font is changed.
  * The user scale factor is computed based on the used font.
  * The JRE does not scale anything.
- * So we have to invoke {@link #scale(float)} where necessary.
+ * So we have to invoke {@link #scale(int)} where necessary.
  * There is only one user scale factor for all displays.
  * The user scale factor may change if the active LaF, "defaultFont" or "Label.font" has changed.
  * If system scaling mode is available the user scale factor is usually 1,
  * but may be larger on Linux or if the default font is changed.
  *
+ * <h2>Zooming</h2>
+ *
+ * Zooming allows appliations to easily zoom their UI, if FlatLaf is active Laf.
+ * This is done by changing user scale factor and default font.
+ * There are methods to increase, decrease and reset zoom factor.
+ * <p>
+ * Note: Only standard Swing components are zoomed.
+ *       Custom components need to use {@link #scale(int)} to zoom their UI.
+ *
  * @author Karl Tauber
  */
 public class UIScale
 {
+	/** @since 3.7 */ public static final String PROP_USER_SCALE_FACTOR = "userScaleFactor";
+	/** @since 3.7 */ public static final String PROP_ZOOM_FACTOR = "zoomFactor";
+
 	private static final boolean DEBUG = false;
 
 	private static PropertyChangeSupport changeSupport;
@@ -87,7 +101,7 @@ public class UIScale
 		changeSupport.removePropertyChangeListener( listener );
 	}
 
-	//---- system scaling (Java 9) --------------------------------------------
+	//---- system scaling (Java 9+) -------------------------------------------
 
 	private static Boolean jreHiDPI;
 
@@ -135,10 +149,13 @@ public class UIScale
 		return (isSystemScalingEnabled() && gc != null) ? gc.getDefaultTransform().getScaleX() : 1;
 	}
 
-	//---- user scaling (Java 8) ----------------------------------------------
+	//---- user scaling (Java 8 / zooming) ------------------------------------
 
+	private static float unzoomedScaleFactor = 1;
 	private static float scaleFactor = 1;
 	private static boolean initialized;
+	private static boolean listenerInitialized; // use extra flag for unit tests
+	private static boolean ignoreFontChange;
 
 	private static void initialize() {
 		if( initialized )
@@ -148,33 +165,43 @@ public class UIScale
 		if( !isUserScalingEnabled() )
 			return;
 
+		initializeListener();
+
+		updateScaleFactor( true );
+	}
+
+	private static void initializeListener() {
+		if( listenerInitialized )
+			return;
+		listenerInitialized = true;
+
 		// listener to update scale factor if LaF changed, "defaultFont" or "Label.font" changed
 		PropertyChangeListener listener = new PropertyChangeListener() {
 			@Override
 			public void propertyChange( PropertyChangeEvent e ) {
 				switch( e.getPropertyName() ) {
 					case "lookAndFeel":
-						// it is not necessary (and possible) to remove listener of old LaF defaults
+						// it is not possible (and necessary) to remove listener of old LaF defaults
+						// because it is not possible to access the UIDefault object of the old LaF
 						if( e.getNewValue() instanceof LookAndFeel )
 							UIManager.getLookAndFeelDefaults().addPropertyChangeListener( this );
-						updateScaleFactor();
+						updateScaleFactor( true );
 						break;
 
 					case "defaultFont":
 					case "Label.font":
-						updateScaleFactor();
+						if( !ignoreFontChange )
+							updateScaleFactor( false );
 						break;
 				}
 			}
 		};
-		UIManager.addPropertyChangeListener( listener );
 		UIManager.getDefaults().addPropertyChangeListener( listener );
 		UIManager.getLookAndFeelDefaults().addPropertyChangeListener( listener );
-
-		updateScaleFactor();
+		UIManager.addPropertyChangeListener( listener );
 	}
 
-	private static void updateScaleFactor() {
+	private static void updateScaleFactor( boolean lafChanged ) {
 		if( !isUserScalingEnabled() )
 			return;
 
@@ -185,17 +212,20 @@ public class UIScale
 			return;
 		}
 
-		// use font size to calculate scale factor (instead of DPI)
-		// because even if we are on a HiDPI display it is not sure
-		// that a larger font size is set by the current LaF
-		// (e.g. can avoid large icons with small text)
+		// get font that is used to calculate scale factor
 		Font font = null;
 		if( UIManager.getLookAndFeel() instanceof FlatLaf )
 			font = UIManager.getFont( "defaultFont" );
 		if( font == null )
 			font = UIManager.getFont( "Label.font" );
 
-		setUserScaleFactor( computeFontScaleFactor( font ), true );
+		float fontScaleFactor = computeFontScaleFactor( font );
+		if( lafChanged && UIManager.getLookAndFeel() instanceof FlatLaf ) {
+			// FlatLaf has applied zoom factor in FlatLaf.initDefaultFont() to defaultFont,
+			// so we need to take it into account to get correct user scale factor
+			fontScaleFactor /= zoomFactor;
+		}
+		setUserScaleFactor( fontScaleFactor, true );
 	}
 
 	/**
@@ -204,7 +234,7 @@ public class UIScale
 	 * @since 2
 	 */
 	public static float computeFontScaleFactor( Font font ) {
-		if( SystemInfo.isWindows ) {
+		if( SystemInfo.isWindows && !inUnitTests ) {
 			// Special handling for Windows to be compatible with OS scaling,
 			// which distinguish between "screen scaling" and "text scaling".
 			//  - Windows "screen scaling" scales everything (text, icon, gaps, etc.)
@@ -335,7 +365,7 @@ public class UIScale
 	}
 
 	/**
-	 * Returns the user scale factor.
+	 * Returns the user scale factor (including zoom factor).
 	 */
 	public static float getUserScaleFactor() {
 		initialize();
@@ -345,27 +375,49 @@ public class UIScale
 	/**
 	 * Sets the user scale factor.
 	 */
-	private static void setUserScaleFactor( float scaleFactor, boolean normalize ) {
-		if( normalize ) {
-			if( scaleFactor < 1f ) {
-				scaleFactor = FlatSystemProperties.getBoolean( FlatSystemProperties.UI_SCALE_ALLOW_SCALE_DOWN, false )
-					? Math.round( scaleFactor * 10f ) / 10f // round small scale factor to 1/10
-					: 1f;
-			} else if( scaleFactor > 1f ) // round scale factor to 1/4
-				scaleFactor = Math.round( scaleFactor * 4f ) / 4f;
-		}
+	private static void setUserScaleFactor( float unzoomedScaleFactor, boolean normalize ) {
+		if( normalize )
+			unzoomedScaleFactor = normalizeScaleFactor( unzoomedScaleFactor );
 
 		// minimum scale factor
-		scaleFactor = Math.max( scaleFactor, 0.1f );
+		unzoomedScaleFactor = Math.max( unzoomedScaleFactor, 0.1f );
+
+		if( unzoomedScaleFactor == UIScale.unzoomedScaleFactor )
+			return;
+
+		if( DEBUG )
+			System.out.println( "Unzoomed scale factor " + UIScale.unzoomedScaleFactor + " --> " + unzoomedScaleFactor );
+
+		UIScale.unzoomedScaleFactor = unzoomedScaleFactor;
+		setScaleFactor( unzoomedScaleFactor * zoomFactor );
+	}
+
+	private static void setScaleFactor( float scaleFactor ) {
+		// round scale factor to 1/100
+		scaleFactor = Math.round( scaleFactor * 100f ) / 100f;
+
+		if( scaleFactor == UIScale.scaleFactor )
+			return;
 
 		float oldScaleFactor = UIScale.scaleFactor;
 		UIScale.scaleFactor = scaleFactor;
 
 		if( DEBUG )
-			System.out.println( "HiDPI scale factor " + scaleFactor );
+			System.out.println( "Scale factor          " + oldScaleFactor + " --> " + scaleFactor + "   (unzoomed " + UIScale.unzoomedScaleFactor + ")" );
 
 		if( changeSupport != null )
-			changeSupport.firePropertyChange( "userScaleFactor", oldScaleFactor, scaleFactor );
+			changeSupport.firePropertyChange( PROP_USER_SCALE_FACTOR, oldScaleFactor, scaleFactor );
+	}
+
+	private static float normalizeScaleFactor( float scaleFactor ) {
+		if( scaleFactor < 1f ) {
+			return FlatSystemProperties.getBoolean( FlatSystemProperties.UI_SCALE_ALLOW_SCALE_DOWN, false )
+				? Math.round( scaleFactor * 10f ) / 10f // round small scale factor to 1/10
+				: 1f;
+		} else if( scaleFactor > 1f ) // round scale factor to 1/4
+			return Math.round( scaleFactor * 4f ) / 4f;
+		else
+			return scaleFactor;
 	}
 
 	/**
@@ -451,4 +503,185 @@ public class UIScale
 				? new InsetsUIResource( scale( insets.top ), scale( insets.left ), scale( insets.bottom ), scale( insets.right ) )
 				: new Insets          ( scale( insets.top ), scale( insets.left ), scale( insets.bottom ), scale( insets.right ) ));
 	}
+
+	//---- zoom ---------------------------------------------------------------
+
+	private static float zoomFactor = 1;
+	private static float[] supportedZoomFactors = { 1f, 1.1f, 1.25f, 1.5f, 1.75f, 2f };
+
+	/**
+	 * Returns the current zoom factor. Default is {@code 1}.
+	 *
+	 * @since 3.7
+	 */
+	public static float getZoomFactor() {
+		return zoomFactor;
+	}
+
+	/**
+	 * Sets the zoom factor.
+	 * Also updates user scale factor and default font (if FlatLaf is active Laf).
+	 * <p>
+	 * UI needs to be updated if zoom factor has changed. E.g.:
+	 * <pre>{@code
+	 * if( UIScale.setZoomFactor( newZoomFactor ) )
+	 *     FlatLaf.updateUI();
+	 * }</pre>
+	 *
+	 * @param zoomFactor new zoom factor
+	 * @return {@code true} if zoom factor has changed
+	 * @since 3.7
+	 */
+	public static boolean setZoomFactor( float zoomFactor ) {
+		// minimum zoom factor
+		zoomFactor = Math.max( zoomFactor, 0.1f );
+
+		if( UIScale.zoomFactor == zoomFactor )
+			return false;
+
+		float oldZoomFactor = UIScale.zoomFactor;
+		UIScale.zoomFactor = zoomFactor;
+
+		if( DEBUG )
+			System.out.println( "Zoom factor           " + oldZoomFactor + " --> " + zoomFactor );
+
+		setScaleFactor( UIScale.unzoomedScaleFactor * zoomFactor );
+
+		if( initialized && UIManager.getLookAndFeel() instanceof FlatLaf ) {
+			// see also FlatLaf.initDefaultFont()
+			UIDefaults defaults = UIManager.getLookAndFeelDefaults();
+			Font font = defaults.getFont( "defaultFont" );
+			int unzoomedSize = defaults.getInt( "defaultFont.unzoomedSize" );
+			if( unzoomedSize == 0 ) {
+				unzoomedSize = font.getSize();
+				defaults.put( "defaultFont.unzoomedSize", unzoomedSize );
+			}
+
+			// update "defaultFont"
+			ignoreFontChange = true;
+			try {
+				// get application default font before updating Laf default font
+				Font appFont = UIManager.getFont( "defaultFont" );
+
+				// update Laf default font
+				int newFontSize = Math.max( Math.round( unzoomedSize * zoomFactor ), 1 );
+				defaults.put( "defaultFont", new FontUIResource( font.deriveFont( (float) newFontSize ) ) );
+
+				if( DEBUG )
+					System.out.println( "Zoom Laf font         " + font.getSize() + " --> " + newFontSize + "   (unzoomed " + unzoomedSize + ")" );
+
+				// check whether application has changed default font
+				if( appFont != font ) {
+					// application has own default font --> also zoom it
+					int newAppFontSize = Math.max( Math.round( (appFont.getSize() / oldZoomFactor) * zoomFactor ), 1 );
+					UIManager.put( "defaultFont", appFont.deriveFont( (float) newAppFontSize ) );
+
+					if( DEBUG )
+						System.out.println( "Zoom app font         " + appFont.getSize() + " --> " + newAppFontSize );
+				}
+			} finally {
+				ignoreFontChange = false;
+			}
+		}
+
+		if( changeSupport != null )
+			changeSupport.firePropertyChange( PROP_ZOOM_FACTOR, oldZoomFactor, zoomFactor );
+
+		return true;
+	}
+
+	/**
+	 * Increases zoom factor using next greater factor in supported factors array.
+	 * <p>
+	 * UI needs to be updated if zoom factor has changed. E.g.:
+	 * <pre>{@code
+	 * if( UIScale.zoomIn() )
+	 *     FlatLaf.updateUI();
+	 * }</pre>
+	 *
+	 * @return {@code true} if zoom factor has changed
+	 * @see #getSupportedZoomFactors()
+	 * @since 3.7
+	 */
+	public static boolean zoomIn() {
+		int i = Arrays.binarySearch( supportedZoomFactors, zoomFactor );
+		int next = (i >= 0) ? i + 1 : -i - 1;
+		if( next >= supportedZoomFactors.length )
+			return false;
+
+		return setZoomFactor( supportedZoomFactors[next] );
+	}
+
+	/**
+	 * Decreases zoom factor using next smaller factor in supported factors array.
+	 * <p>
+	 * UI needs to be updated if zoom factor has changed. E.g.:
+	 * <pre>{@code
+	 * if( UIScale.zoomOut() )
+	 *     FlatLaf.updateUI();
+	 * }</pre>
+	 *
+	 * @return {@code true} if zoom factor has changed
+	 * @see #getSupportedZoomFactors()
+	 * @since 3.7
+	 */
+	public static boolean zoomOut() {
+		int i = Arrays.binarySearch( supportedZoomFactors, zoomFactor );
+		int prev = (i >= 0) ? i - 1 : -i - 2;
+		if( prev < 0 )
+			return false;
+
+		return setZoomFactor( supportedZoomFactors[prev] );
+	}
+
+	/**
+	 * Resets zoom factor to {@code 1}.
+	 * <p>
+	 * UI needs to be updated if zoom factor has changed. E.g.:
+	 * <pre>{@code
+	 * if( UIScale.zoomReset() )
+	 *     FlatLaf.updateUI();
+	 * }</pre>
+	 *
+	 * @return {@code true} if zoom factor has changed
+	 * @since 3.7
+	 */
+	public static boolean zoomReset() {
+		return setZoomFactor( 1 );
+	}
+
+	/**
+	 * Returns the supported zoom factors used for {@link #zoomIn()} and {@link #zoomOut()}.
+	 * <p>
+	 * Default is {@code [ 1f, 1.1f, 1.25f, 1.5f, 1.75f, 2f ]}.
+	 *
+	 * @since 3.7
+	 */
+	public static float[] getSupportedZoomFactors() {
+		return supportedZoomFactors.clone();
+	}
+
+	/**
+	 * Sets the supported zoom factors used for {@link #zoomIn()} and {@link #zoomOut()}.
+	 *
+	 * @since 3.7
+	 */
+	public static void setSupportedZoomFactors( float[] supportedZoomFactors ) {
+		UIScale.supportedZoomFactors = supportedZoomFactors.clone();
+		Arrays.sort( UIScale.supportedZoomFactors );
+
+		if( Arrays.binarySearch( UIScale.supportedZoomFactors, 1f ) < 0 )
+			throw new IllegalArgumentException( "supportedZoomFactors array must contain value 1f" );
+	}
+
+	//---- unit testing -------------------------------------------------------
+
+	static boolean inUnitTests;
+
+	static void tests_uninitialize() {
+		initialized = false;
+		unzoomedScaleFactor = 1;
+		scaleFactor = 1;
+		zoomFactor = 1;
+	}
 }

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties

@@ -696,7 +696,7 @@ TabbedPane.hiddenTabsNavigation = moreTabsButton
 TabbedPane.tabAreaAlignment = leading
 # allowed values: leading, trailing or center
 TabbedPane.tabAlignment = center
-# allowed values: preferred, equal or compact
+# allowed values: preferred, equal, compact or iconsOnly
 TabbedPane.tabWidthMode = preferred
 # allowed values: none, auto, left or right
 TabbedPane.tabRotation = none
@@ -977,6 +977,24 @@ Tree.icon.openColor = @icon
 
 #---- Styles ------------------------------------------------------------------
 
+#---- scale icons ----
+
+@largeScale = 1.125
+@mediumScale = 0.875
+@smallScale = 0.8125
+@miniScale = 0.75
+
+[style]CheckBox.large = icon.scale: @largeScale; iconTextGap: 5
+[style]CheckBox.medium = icon.scale: @mediumScale
+[style]CheckBox.small = icon.scale: @smallScale; iconTextGap: 3
+[style]CheckBox.mini = icon.scale: @miniScale; iconTextGap: 3
+
+[style]RadioButton.large = icon.scale: @largeScale; iconTextGap: 5
+[style]RadioButton.medium = icon.scale: @mediumScale
+[style]RadioButton.small = icon.scale: @smallScale; iconTextGap: 3
+[style]RadioButton.mini = icon.scale: @miniScale; iconTextGap: 3
+
+
 #---- inTextField ----
 # for leading/trailing components in text fields
 

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

@@ -30,6 +30,10 @@ import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 import com.formdev.flatlaf.icons.*;
+import com.formdev.flatlaf.ui.FlatInternalFrameUI.FlatInternalFrameBorder;
+import com.formdev.flatlaf.ui.TestFlatStyling.CustomCheckBoxIcon;
+import com.formdev.flatlaf.ui.TestFlatStyling.CustomIcon;
+import com.formdev.flatlaf.ui.TestFlatStyling.CustomRadioButtonIcon;
 
 /**
  * @author Karl Tauber
@@ -70,6 +74,8 @@ public class TestFlatStyleableInfo
 		//---- FlatHelpButtonIcon ----
 
 		expectedMap( expected,
+			"help.scale", float.class,
+
 			"help.focusWidth", int.class,
 			"help.focusColor", Color.class,
 			"help.innerFocusWidth", float.class,
@@ -144,7 +150,20 @@ public class TestFlatStyleableInfo
 
 	@Test
 	void checkBox() {
-		JCheckBox c = new JCheckBox();
+		checkBox( new JCheckBox() );
+	}
+
+	@Test
+	void checkBox2() {
+		checkBox( new JCheckBox( new CustomIcon() ) );
+	}
+
+	@Test
+	void checkBox3() {
+		checkBox( new JCheckBox( new CustomCheckBoxIcon() ) );
+	}
+
+	private void checkBox( JCheckBox c ) {
 		FlatCheckBoxUI ui = (FlatCheckBoxUI) c.getUI();
 
 		assertTrue( ui.getDefaultIcon() instanceof FlatCheckBoxIcon );
@@ -153,6 +172,11 @@ public class TestFlatStyleableInfo
 		Map<String, Class<?>> expected = new LinkedHashMap<>();
 		radioButton( expected );
 
+		// remove "icon." keys if check box has custom icon
+		Icon icon = c.getIcon();
+		if( icon != null && !(icon instanceof FlatCheckBoxIcon) )
+			expected.keySet().removeIf( key -> key.startsWith( "icon." ) );
+
 		assertMapEquals( expected, ui.getStyleableInfos( c ) );
 	}
 
@@ -175,8 +199,9 @@ public class TestFlatStyleableInfo
 			"disabledForeground", Color.class,
 
 			"buttonBackground", Color.class,
-			"buttonFocusedBackground", Color.class,
 			"buttonEditableBackground", Color.class,
+			"buttonFocusedBackground", Color.class,
+			"buttonFocusedEditableBackground", Color.class,
 			"buttonSeparatorWidth", float.class,
 			"buttonSeparatorColor", Color.class,
 			"buttonDisabledSeparatorColor", Color.class,
@@ -391,6 +416,8 @@ public class TestFlatStyleableInfo
 
 	private void menuItem_checkIcon( Map<String, Class<?>> expected ) {
 		expectedMap( expected,
+			"icon.scale", float.class,
+
 			"icon.checkmarkColor", Color.class,
 			"icon.disabledCheckmarkColor", Color.class,
 			"selectionForeground", Color.class
@@ -399,6 +426,8 @@ public class TestFlatStyleableInfo
 
 	private void menuItem_arrowIcon( Map<String, Class<?>> expected ) {
 		expectedMap( expected,
+			"icon.scale", float.class,
+
 			"icon.arrowType", String.class,
 			"icon.arrowColor", Color.class,
 			"icon.disabledArrowColor", Color.class,
@@ -434,7 +463,8 @@ public class TestFlatStyleableInfo
 
 		expectedMap( expected,
 			// capsLockIcon
-			"capsLockIconColor", Color.class
+			"capsLockIconColor", Color.class,
+			"capsLockIconScale", float.class
 		);
 
 		// border
@@ -492,7 +522,20 @@ public class TestFlatStyleableInfo
 
 	@Test
 	void radioButton() {
-		JRadioButton c = new JRadioButton();
+		radioButton( new JRadioButton() );
+	}
+
+	@Test
+	void radioButton2() {
+		radioButton( new JRadioButton( new CustomIcon() ) );
+	}
+
+	@Test
+	void radioButton3() {
+		radioButton( new JRadioButton( new CustomRadioButtonIcon() ) );
+	}
+
+	private void radioButton( JRadioButton c ) {
 		FlatRadioButtonUI ui = (FlatRadioButtonUI) c.getUI();
 
 		assertTrue( ui.getDefaultIcon() instanceof FlatRadioButtonIcon );
@@ -504,6 +547,11 @@ public class TestFlatStyleableInfo
 			"icon.centerDiameter", float.class
 		);
 
+		// remove "icon." keys if radio button has custom icon
+		Icon icon = c.getIcon();
+		if( icon != null && !(icon instanceof FlatRadioButtonIcon) )
+			expected.keySet().removeIf( key -> key.startsWith( "icon." ) );
+
 		assertMapEquals( expected, ui.getStyleableInfos( c ) );
 	}
 
@@ -513,6 +561,8 @@ public class TestFlatStyleableInfo
 
 			//---- icon ----
 
+			"icon.scale", float.class,
+
 			"icon.focusWidth", float.class,
 			"icon.focusColor", Color.class,
 			"icon.borderWidth", float.class,
@@ -791,6 +841,7 @@ public class TestFlatStyleableInfo
 			"tabIconPlacement", int.class,
 
 			// FlatTabbedPaneCloseIcon
+			"closeScale", float.class,
 			"closeSize", Dimension.class,
 			"closeArc", int.class,
 			"closeCrossPlainSize", float.class,
@@ -1112,6 +1163,16 @@ public class TestFlatStyleableInfo
 		assertMapEquals( expected, border.getStyleableInfos() );
 	}
 
+	@Test
+	void flatScrollPaneBorder() {
+		FlatScrollPaneBorder border = new FlatScrollPaneBorder();
+
+		Map<String, Class<?>> expected = new LinkedHashMap<>();
+		flatScrollPaneBorder( expected );
+
+		assertMapEquals( expected, border.getStyleableInfos() );
+	}
+
 	@Test
 	void flatTextBorder() {
 		FlatTextBorder border = new FlatTextBorder();
@@ -1132,6 +1193,64 @@ public class TestFlatStyleableInfo
 		assertMapEquals( expected, border.getStyleableInfos() );
 	}
 
+	@Test
+	void flatDropShadowBorder() {
+		FlatDropShadowBorder border = new FlatDropShadowBorder();
+
+		Map<String, Class<?>> expected = expectedMap(
+			"shadowColor", Color.class,
+			"shadowInsets", Insets.class,
+			"shadowOpacity", float.class
+		);
+
+		assertMapEquals( expected, border.getStyleableInfos() );
+	}
+
+	@Test
+	void flatMenuBarBorder() {
+		FlatMenuBarBorder border = new FlatMenuBarBorder();
+
+		Map<String, Class<?>> expected = expectedMap(
+			"borderColor", Color.class
+		);
+
+		assertMapEquals( expected, border.getStyleableInfos() );
+	}
+
+	@Test
+	void flatPopupMenuBorder() {
+		FlatPopupMenuBorder border = new FlatPopupMenuBorder();
+
+		Map<String, Class<?>> expected = expectedMap(
+			"borderInsets", Insets.class,
+			"borderColor", Color.class
+		);
+
+		assertMapEquals( expected, border.getStyleableInfos() );
+	}
+
+	@Test
+	void flatInternalFrameBorder() {
+		FlatInternalFrameBorder border = new FlatInternalFrameBorder();
+
+		Map<String, Class<?>> expected = expectedMap(
+			"activeBorderColor", Color.class,
+			"inactiveBorderColor", Color.class,
+			"borderLineWidth", int.class,
+			"dropShadowPainted", boolean.class,
+			"borderMargins", Insets.class,
+
+			"activeDropShadowColor", Color.class,
+			"activeDropShadowInsets", Insets.class,
+			"activeDropShadowOpacity", float.class,
+			"inactiveDropShadowColor", Color.class,
+			"inactiveDropShadowInsets", Insets.class,
+			"inactiveDropShadowOpacity", float.class
+		);
+
+		assertMapEquals( expected, border.getStyleableInfos() );
+	}
+
 	//---- icons --------------------------------------------------------------
 
 	@Test
@@ -1161,6 +1280,8 @@ public class TestFlatStyleableInfo
 
 	private void flatCheckBoxIcon( Map<String, Class<?>> expected ) {
 		expectedMap( expected,
+			"scale", float.class,
+
 			"focusWidth", float.class,
 			"focusColor", Color.class,
 			"borderWidth", float.class,
@@ -1245,6 +1366,8 @@ public class TestFlatStyleableInfo
 
 	private void flatCheckBoxMenuItemIcon( Map<String, Class<?>> expected ) {
 		expectedMap( expected,
+			"scale", float.class,
+
 			"checkmarkColor", Color.class,
 			"disabledCheckmarkColor", Color.class,
 			"selectionForeground", Color.class
@@ -1263,6 +1386,8 @@ public class TestFlatStyleableInfo
 
 	private void flatMenuArrowIcon( Map<String, Class<?>> expected ) {
 		expectedMap( expected,
+			"scale", float.class,
+
 			"arrowType", String.class,
 			"arrowColor", Color.class,
 			"disabledArrowColor", Color.class,
@@ -1275,6 +1400,8 @@ public class TestFlatStyleableInfo
 		FlatHelpButtonIcon icon = new FlatHelpButtonIcon();
 
 		Map<String, Class<?>> expected = expectedMap(
+			"scale", float.class,
+
 			"focusWidth", int.class,
 			"focusColor", Color.class,
 			"innerFocusWidth", float.class,
@@ -1295,4 +1422,87 @@ public class TestFlatStyleableInfo
 
 		assertMapEquals( expected, icon.getStyleableInfos() );
 	}
+
+	@Test
+	void flatClearIcon() {
+		FlatClearIcon icon = new FlatClearIcon();
+
+		Map<String, Class<?>> expected = expectedMap(
+			"clearIconScale", float.class,
+
+			"clearIconColor", Color.class,
+			"clearIconHoverColor", Color.class,
+			"clearIconPressedColor", Color.class
+		);
+
+		assertMapEquals( expected, icon.getStyleableInfos() );
+	}
+
+	@Test
+	void flatSearchIcon() {
+		FlatSearchIcon icon = new FlatSearchIcon();
+
+		Map<String, Class<?>> expected = new LinkedHashMap<>();
+		flatSearchIcon( expected );
+
+		assertMapEquals( expected, icon.getStyleableInfos() );
+	}
+
+	@Test
+	void flatSearchWithHistoryIcon() {
+		FlatSearchWithHistoryIcon icon = new FlatSearchWithHistoryIcon();
+
+		Map<String, Class<?>> expected = new LinkedHashMap<>();
+		flatSearchIcon( expected );
+
+		assertMapEquals( expected, icon.getStyleableInfos() );
+	}
+
+	private void flatSearchIcon( Map<String, Class<?>> expected ) {
+		expectedMap( expected,
+			"searchIconScale", float.class,
+
+			"searchIconColor", Color.class,
+			"searchIconHoverColor", Color.class,
+			"searchIconPressedColor", Color.class
+		);
+	}
+
+	@Test
+	void flatCapsLockIcon() {
+		FlatCapsLockIcon icon = new FlatCapsLockIcon();
+
+		Map<String, Class<?>> expected = expectedMap(
+			"capsLockIconScale", float.class,
+
+			"capsLockIconColor", Color.class
+		);
+
+		assertMapEquals( expected, icon.getStyleableInfos() );
+	}
+
+	@Test
+	void flatTabbedPaneCloseIcon() {
+		FlatTabbedPaneCloseIcon icon = new FlatTabbedPaneCloseIcon();
+
+		Map<String, Class<?>> expected = expectedMap(
+			//TODO closeScale ?
+//			"scale", float.class,
+			"closeScale", float.class,
+
+			"closeSize", Dimension.class,
+			"closeArc", int.class,
+			"closeCrossPlainSize", float.class,
+			"closeCrossFilledSize", float.class,
+			"closeCrossLineWidth", float.class,
+			"closeBackground", Color.class,
+			"closeForeground", Color.class,
+			"closeHoverBackground", Color.class,
+			"closeHoverForeground", Color.class,
+			"closePressedBackground", Color.class,
+			"closePressedForeground", Color.class
+		);
+
+		assertMapEquals( expected, icon.getStyleableInfos() );
+	}
 }

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

@@ -17,9 +17,15 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Font;
+import java.lang.reflect.Method;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Objects;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.TreeSet;
 import javax.swing.UIManager;
+import org.junit.jupiter.api.Test;
 import org.opentest4j.AssertionFailedError;
 import com.formdev.flatlaf.FlatIntelliJLaf;
 import com.formdev.flatlaf.FlatLightLaf;
@@ -57,12 +63,57 @@ public class TestUtils
 
 	public static void assertMapEquals( Map<?, ?> expected, Map<?, ?> actual ) {
 		if( !Objects.equals( expected, actual ) ) {
-			String expectedStr = String.valueOf( expected ).replace( ", ", ",\n" );
-			String actualStr = String.valueOf( actual ).replace( ", ", ",\n" );
+			String expectedStr = String.valueOf( new TreeMap<>( expected ) ).replace( ", ", ",\n" );
+			String actualStr = String.valueOf( new TreeMap<>( actual ) ).replace( ", ", ",\n" );
 			String msg = String.format( "expected: <%s> but was: <%s>", expectedStr, actualStr );
 
 			// pass expected/actual strings to exception for nice diff in IDE
 			throw new AssertionFailedError( msg, expectedStr, actualStr );
 		}
 	}
+
+	public static void assertSetEquals( Set<?> expected, Set<?> actual, String message ) {
+		if( !Objects.equals( expected, actual ) ) {
+			String expectedStr = String.valueOf( new TreeSet<>( expected ) ).replace( ", ", ",\n" );
+			String actualStr = String.valueOf( new TreeSet<>( actual ) ).replace( ", ", ",\n" );
+			String msg = String.format( "expected: <%s> but was: <%s>", expectedStr, actualStr );
+			if( message != null )
+				msg = message + " ==> " + msg;
+
+			// pass expected/actual strings to exception for nice diff in IDE
+			throw new AssertionFailedError( msg, expectedStr, actualStr );
+		}
+	}
+
+	public static void checkImplementedTests( Set<String> excludes, Class<?> baseClass, Class<?>... classes ) {
+		Set<String> expected = getTestMethods( baseClass );
+
+		for( Class<?> cls : classes ) {
+			Set<String> actual = getTestMethods( cls );
+
+			for( String methodName : expected ) {
+				if( !actual.contains( methodName ) && !excludes.contains( methodName ) ) {
+					throw new AssertionFailedError( "missing " + cls.getSimpleName() + '.' + methodName
+						+ "() for " + baseClass.getSimpleName() + '.' + methodName + "()" );
+				}
+			}
+
+			for( String methodName : actual ) {
+				if( !expected.contains( methodName ) && !excludes.contains( methodName ) ) {
+					throw new AssertionFailedError( "missing " + baseClass.getSimpleName() + '.' + methodName
+						+ "() for " + cls.getSimpleName() + '.' + methodName + "()" );
+				}
+			}
+		}
+	}
+
+	private static Set<String> getTestMethods( Class<?> cls ) {
+		HashSet<String> tests = new HashSet<>();
+		Method[] methods = cls.getDeclaredMethods();
+		for( Method m : methods ) {
+			if( m.isAnnotationPresent( Test.class ) )
+				tests.add( m.getName() );
+		}
+		return tests;
+	}
 }

flatlaf-core/src/test/java/com/formdev/flatlaf/util/TestUIScale.java

@@ -0,0 +1,343 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.util;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import java.awt.Font;
+import java.util.Collections;
+import java.util.Map;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.plaf.metal.MetalLookAndFeel;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import com.formdev.flatlaf.FlatDarkLaf;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.FlatLightLaf;
+import com.formdev.flatlaf.FlatSystemProperties;
+
+/**
+ * @author Karl Tauber
+ */
+public class TestUIScale
+{
+	private static Map<String, String> FONT_EXTRA_DEFAULTS_1x = Collections.singletonMap(
+		"defaultFont", "{instance}java.awt.Font,Dialog,0,12" );
+	private static Map<String, String> FONT_EXTRA_DEFAULTS_1_5x = Collections.singletonMap(
+		"defaultFont", "{instance}java.awt.Font,Dialog,0,18" );
+
+	@BeforeAll
+	static void setup() {
+		UIScale.inUnitTests = true;
+
+		// disable platform specific fonts
+		System.setProperty( "flatlaf.uiScale.fontSizeDivider", "12" );
+		FlatLaf.setGlobalExtraDefaults( FONT_EXTRA_DEFAULTS_1x );
+	}
+
+	@AfterAll
+	static void cleanup() throws UnsupportedLookAndFeelException {
+		System.clearProperty( "flatlaf.uiScale.fontSizeDivider" );
+		FlatLaf.setGlobalExtraDefaults( null );
+
+		UIScale.inUnitTests = false;
+	}
+
+	@AfterEach
+	void afterEach() throws UnsupportedLookAndFeelException {
+		UIManager.setLookAndFeel( new MetalLookAndFeel() );
+		UIManager.put( "defaultFont", null );
+		UIManager.put( "Label.font", null );
+		FlatLaf.setGlobalExtraDefaults( FONT_EXTRA_DEFAULTS_1x );
+
+		UIScale.tests_uninitialize();
+	}
+
+	@Test
+	void testCustomScaleFactor() {
+		System.setProperty( FlatSystemProperties.UI_SCALE, "1.25x" );
+		assertScaleFactor( 1.25f );
+
+		System.setProperty( FlatSystemProperties.UI_SCALE, "2x" );
+		UIScale.tests_uninitialize();
+		assertScaleFactor( 2f );
+
+		System.clearProperty( FlatSystemProperties.UI_SCALE );
+	}
+
+	@Test
+	void testLabelFontScaling() {
+		assertInstanceOf( MetalLookAndFeel.class, UIManager.getLookAndFeel() );
+
+		testLabelFont(  8, 1f );
+		testLabelFont(  9, 1f );
+		testLabelFont( 10, 1f );
+		testLabelFont( 11, 1f );
+		testLabelFont( 12, 1f );
+		testLabelFont( 13, 1f );
+		testLabelFont( 14, 1.25f );
+		testLabelFont( 15, 1.25f );
+		testLabelFont( 16, 1.25f );
+		testLabelFont( 17, 1.5f );
+		testLabelFont( 18, 1.5f );
+		testLabelFont( 19, 1.5f );
+		testLabelFont( 20, 1.75f );
+		testLabelFont( 21, 1.75f );
+		testLabelFont( 22, 1.75f );
+		testLabelFont( 23, 2f );
+		testLabelFont( 24, 2f );
+		testLabelFont( 25, 2f );
+		testLabelFont( 26, 2.25f );
+	}
+
+	private void testLabelFont( int fontSize, float expectedScaleFactor ) {
+		UIManager.put( "Label.font", new Font( Font.DIALOG, Font.PLAIN, fontSize ) );
+		assertScaleFactor( expectedScaleFactor );
+	}
+
+	@Test
+	void testDefaultFontScaling() {
+		FlatLightLaf.setup();
+
+		testDefaultFont(  8, 1f );
+		testDefaultFont(  9, 1f );
+		testDefaultFont( 10, 1f );
+		testDefaultFont( 11, 1f );
+		testDefaultFont( 12, 1f );
+		testDefaultFont( 13, 1f );
+		testDefaultFont( 14, 1.25f );
+		testDefaultFont( 15, 1.25f );
+		testDefaultFont( 16, 1.25f );
+		testDefaultFont( 17, 1.5f );
+		testDefaultFont( 18, 1.5f );
+		testDefaultFont( 19, 1.5f );
+		testDefaultFont( 20, 1.75f );
+		testDefaultFont( 21, 1.75f );
+		testDefaultFont( 22, 1.75f );
+		testDefaultFont( 23, 2f );
+		testDefaultFont( 24, 2f );
+		testDefaultFont( 25, 2f );
+		testDefaultFont( 26, 2.25f );
+	}
+
+	private void testDefaultFont( int fontSize, float expectedScaleFactor ) {
+		UIManager.put( "defaultFont", new Font( Font.DIALOG, Font.PLAIN, fontSize ) );
+		assertScaleFactor( expectedScaleFactor );
+	}
+
+	@Test
+	void testInitialScaleFactorAndFontSizes() {
+		FlatLightLaf.setup();
+		assertScaleFactorAndFontSizes( 1f, 12, -1 );
+
+		FlatLaf.setGlobalExtraDefaults( FONT_EXTRA_DEFAULTS_1_5x );
+		FlatDarkLaf.setup();
+		assertScaleFactorAndFontSizes( 1.5f, 18, -1 );
+	}
+
+	@Test
+	void zoom_Metal() {
+		UIScale.setZoomFactor( 1.1f );
+		assertScaleFactor( 1.1f );
+
+		UIScale.setZoomFactor( 1.3f );
+		assertScaleFactor( 1.3f );
+
+		UIScale.setZoomFactor( 2.3f );
+		assertScaleFactor( 2.3f );
+	}
+
+	@Test
+	void zoom_1x() {
+		FlatLightLaf.setup();
+		testZoom( 0.7f,  0.7f,   8, -1 );
+		testZoom( 0.75f, 0.75f,  9, -1 );
+		testZoom( 0.8f,  0.8f,  10, -1 );
+		testZoom( 0.9f,  0.9f,  11, -1 );
+		testZoom( 1f,    1f,    12, -1 );
+		testZoom( 1.1f,  1.1f,  13, -1 );
+		testZoom( 1.2f,  1.2f,  14, -1 );
+		testZoom( 1.25f, 1.25f, 15, -1 );
+		testZoom( 1.3f,  1.3f,  16, -1 );
+		testZoom( 1.4f,  1.4f,  17, -1 );
+		testZoom( 1.5f,  1.5f,  18, -1 );
+		testZoom( 1.6f,  1.6f,  19, -1 );
+		testZoom( 1.7f,  1.7f,  20, -1 );
+		testZoom( 1.75f, 1.75f, 21, -1 );
+		testZoom( 1.8f,  1.8f,  22, -1 );
+		testZoom( 1.9f,  1.9f,  23, -1 );
+		testZoom( 2f,    2f,    24, -1 );
+		testZoom( 2.25f, 2.25f, 27, -1 );
+		testZoom( 2.5f,  2.5f,  30, -1 );
+		testZoom( 2.75f, 2.75f, 33, -1 );
+		testZoom( 3f,    3f,    36, -1 );
+		testZoom( 4f,    4f,    48, -1 );
+	}
+
+	@Test
+	void zoom_1_5x() {
+		FlatLaf.setGlobalExtraDefaults( FONT_EXTRA_DEFAULTS_1_5x );
+		FlatLightLaf.setup();
+
+		testZoom( 0.7f,  1.05f, 13, -1 );
+		testZoom( 0.75f, 1.13f, 14, -1 );
+		testZoom( 0.8f,  1.2f,  14, -1 );
+		testZoom( 0.9f,  1.35f, 16, -1 );
+		testZoom( 1f,    1.5f,  18, -1 );
+		testZoom( 1.1f,  1.65f, 20, -1 );
+		testZoom( 1.2f,  1.8f,  22, -1 );
+		testZoom( 1.25f, 1.88f, 23, -1 );
+		testZoom( 1.3f,  1.95f, 23, -1 );
+		testZoom( 1.4f,  2.1f,  25, -1 );
+		testZoom( 1.5f,  2.25f, 27, -1 );
+		testZoom( 1.6f,  2.4f,  29, -1 );
+		testZoom( 1.7f,  2.55f, 31, -1 );
+		testZoom( 1.75f, 2.63f, 32, -1 );
+		testZoom( 1.8f,  2.7f,  32, -1 );
+		testZoom( 1.9f,  2.85f, 34, -1 );
+		testZoom( 2f,    3f,    36, -1 );
+		testZoom( 2.25f, 3.38f, 41, -1 );
+		testZoom( 2.5f,  3.75f, 45, -1 );
+		testZoom( 2.75f, 4.13f, 50, -1 );
+		testZoom( 3f,    4.5f,  54, -1 );
+		testZoom( 4f,    6f,    72, -1 );
+	}
+
+	@Test
+	void zoomAppFont_1x() {
+		FlatLightLaf.setup();
+		UIManager.put( "defaultFont", new Font( Font.DIALOG, Font.PLAIN, 14 ) );
+
+		testZoom( 1f,    1.25f, 12, 14 );
+		testZoom( 1.1f,  1.38f, 13, 15 );
+		testZoom( 1.25f, 1.56f, 15, 17 );
+		testZoom( 1.5f,  1.88f, 18, 20 );
+		testZoom( 1.75f, 2.19f, 21, 23 );
+		testZoom( 2f,    2.5f,  24, 26 );
+		testZoom( 1f,    1.25f, 12, 13 );
+		testZoom( 2f,    2.5f,  24, 26 );
+	}
+
+	@Test
+	void zoomWithLafChange() {
+		FlatLightLaf.setup();
+		assertScaleFactorAndFontSizes( 1f, 12, -1 );
+		testZoom( 1.1f,  1.1f,  13, -1 );
+
+		FlatDarkLaf.setup();
+		assertScaleFactorAndFontSizes( 1.1f, 13, -1 );
+		testZoom( 1.2f,  1.2f,  14, -1 );
+
+		FlatLightLaf.setup();
+		assertScaleFactorAndFontSizes( 1.2f, 14, -1 );
+		testZoom( 1.3f,  1.3f,  16, -1 );
+
+		FlatLaf.setGlobalExtraDefaults( FONT_EXTRA_DEFAULTS_1_5x );
+		FlatDarkLaf.setup();
+		assertScaleFactorAndFontSizes( 1.95f, 23, -1 );
+		testZoom( 1.4f,  2.1f,  25, -1 );
+
+		FlatLightLaf.setup();
+		assertScaleFactorAndFontSizes( 2.1f, 25, -1 );
+		testZoom( 1.5f,  2.25f,  27, -1 );
+	}
+
+	@Test
+	void zoomWithDefaultFontChange() {
+		FlatLightLaf.setup();
+		assertScaleFactorAndFontSizes( 1f, 12, -1 );
+
+		float zoom1 = 1.4f;
+		testZoom( zoom1,  zoom1,  17, -1 );
+		testDefaultFont(  8, z( zoom1, 1f ) );
+		testDefaultFont(  9, z( zoom1, 1f ) );
+		testDefaultFont( 10, z( zoom1, 1f ) );
+		testDefaultFont( 11, z( zoom1, 1f ) );
+		testDefaultFont( 12, z( zoom1, 1f ) );
+		testDefaultFont( 13, z( zoom1, 1f ) );
+		testDefaultFont( 14, z( zoom1, 1.25f ) );
+		testDefaultFont( 15, z( zoom1, 1.25f ) );
+		testDefaultFont( 16, z( zoom1, 1.25f ) );
+		testDefaultFont( 17, z( zoom1, 1.5f ) );
+		testDefaultFont( 18, z( zoom1, 1.5f ) );
+		testDefaultFont( 19, z( zoom1, 1.5f ) );
+		testDefaultFont( 20, z( zoom1, 1.75f ) );
+		testDefaultFont( 21, z( zoom1, 1.75f ) );
+		testDefaultFont( 22, z( zoom1, 1.75f ) );
+		testDefaultFont( 23, z( zoom1, 2f ) );
+		testDefaultFont( 24, z( zoom1, 2f ) );
+		testDefaultFont( 25, z( zoom1, 2f ) );
+		testDefaultFont( 26, z( zoom1, 2.25f ) );
+
+		float zoom2 = 1.8f;
+		testZoom( zoom2,  4.05f,  22, 33 );
+		testDefaultFont(  8, z( zoom2, 1f ) );
+		testDefaultFont(  9, z( zoom2, 1f ) );
+		testDefaultFont( 10, z( zoom2, 1f ) );
+		testDefaultFont( 11, z( zoom2, 1f ) );
+		testDefaultFont( 12, z( zoom2, 1f ) );
+		testDefaultFont( 13, z( zoom2, 1f ) );
+		testDefaultFont( 14, z( zoom2, 1.25f ) );
+		testDefaultFont( 15, z( zoom2, 1.25f ) );
+		testDefaultFont( 16, z( zoom2, 1.25f ) );
+		testDefaultFont( 17, z( zoom2, 1.5f ) );
+		testDefaultFont( 18, z( zoom2, 1.5f ) );
+		testDefaultFont( 19, z( zoom2, 1.5f ) );
+		testDefaultFont( 20, z( zoom2, 1.75f ) );
+		testDefaultFont( 21, z( zoom2, 1.75f ) );
+		testDefaultFont( 22, z( zoom2, 1.75f ) );
+		testDefaultFont( 23, z( zoom2, 2f ) );
+		testDefaultFont( 24, z( zoom2, 2f ) );
+		testDefaultFont( 25, z( zoom2, 2f ) );
+		testDefaultFont( 26, z( zoom2, 2.25f ) );
+	}
+
+	private static float z( float zoom, float scale ) {
+		// round scale factor to 1/100
+		return Math.round( (zoom * scale) * 100f ) / 100f;
+	}
+
+	private static void testZoom( float zoomFactor, float expectedScaleFactor,
+		int expectedLafFontSize, int expectedAppFontSize )
+	{
+		UIScale.setZoomFactor( zoomFactor );
+		assertScaleFactorAndFontSizes( expectedScaleFactor, expectedLafFontSize, expectedAppFontSize );
+	}
+
+	private static void assertScaleFactorAndFontSizes( float expectedScaleFactor,
+		int expectedLafFontSize, int expectedAppFontSize )
+	{
+		assertScaleFactor( expectedScaleFactor );
+
+		Font lafFont = UIManager.getLookAndFeelDefaults().getFont( "defaultFont" );
+		Font appFont = UIManager.getFont( "defaultFont" );
+		assertEquals( expectedLafFontSize, lafFont.getSize() );
+		if( expectedAppFontSize > 0 ) {
+			assertNotEquals( lafFont, appFont );
+			assertEquals( expectedAppFontSize, appFont.getSize() );
+		} else
+			assertEquals( lafFont, appFont );
+	}
+
+	private static void assertScaleFactor( float expectedScaleFactor ) {
+		assertEquals( expectedScaleFactor, UIScale.getUserScaleFactor() );
+	}
+}

flatlaf-demo/build.gradle.kts

@@ -43,15 +43,13 @@ tasks {
 		dependsOn( ":flatlaf-intellij-themes:jar" )
 //		dependsOn( ":flatlaf-natives-jna:jar" )
 
-		manifest {
-			attributes( "Main-Class" to "com.formdev.flatlaf.demo.FlatLafDemo" )
-
-			if( JavaVersion.current() >= JavaVersion.VERSION_1_9 )
-				attributes( "Multi-Release" to "true" )
+		manifest.attributes(
+			"Main-Class" to "com.formdev.flatlaf.demo.FlatLafDemo",
+			"Multi-Release" to "true",
 
 			// allow loading FlatLaf native library in Java 24+ (see https://openjdk.org/jeps/472)
-			attributes( "Enable-Native-Access" to "ALL-UNNAMED" )
-		}
+			"Enable-Native-Access" to "ALL-UNNAMED",
+		)
 
 		exclude( "module-info.class" )
 		exclude( "META-INF/versions/*/module-info.class" )

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

@@ -111,6 +111,10 @@ class ControlBar
 		UIScale.addPropertyChangeListener( e -> {
 			// update info label because user scale factor may change
 			updateInfoLabel();
+
+			// update "Font" menu (e.g. if zoom factor changed)
+			if( UIScale.PROP_ZOOM_FACTOR.equals( e.getPropertyName() ) )
+				frame.updateFontMenuItems();
 		} );
 	}
 
@@ -192,13 +196,15 @@ class ControlBar
 		String javaVendor = System.getProperty( "java.vendor" );
 		if( "Oracle Corporation".equals( javaVendor ) )
 			javaVendor = null;
+		float zoomFactor = UIScale.getZoomFactor();
 		double systemScaleFactor = UIScale.getSystemScaleFactor( getGraphicsConfiguration() );
 		float userScaleFactor = UIScale.getUserScaleFactor();
 		Font font = UIManager.getFont( "Label.font" );
 		String newInfo = "(Java " + System.getProperty( "java.version" )
 			+ (javaVendor != null ? ("; " + javaVendor) : "")
-			+ (systemScaleFactor != 1 ? (";  system scale factor " + systemScaleFactor) : "")
-			+ (userScaleFactor != 1 ? (";  user scale factor " + userScaleFactor) : "")
+			+ (zoomFactor != 1 ? (";  zoom " + zoomFactor) : "")
+			+ (systemScaleFactor != 1 ? (";  system scale " + systemScaleFactor) : "")
+			+ (userScaleFactor != 1 ? (";  user scale " + userScaleFactor) : "")
 			+ (systemScaleFactor == 1 && userScaleFactor == 1 ? "; no scaling" : "")
 			+ "; " + font.getFamily() + " " + font.getSize()
 			+ (font.isBold() ? " BOLD" : "")

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

@@ -18,12 +18,14 @@ package com.formdev.flatlaf.demo;
 
 import java.awt.*;
 import java.awt.event.*;
+import java.io.File;
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.time.Year;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.prefs.Preferences;
 import javax.swing.*;
 import javax.swing.text.DefaultEditorKit;
@@ -45,11 +47,14 @@ import com.formdev.flatlaf.extras.components.FlatButton.ButtonType;
 import com.formdev.flatlaf.icons.FlatAbstractIcon;
 import com.formdev.flatlaf.themes.FlatMacDarkLaf;
 import com.formdev.flatlaf.themes.FlatMacLightLaf;
+import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.extras.FlatSVGUtils;
 import com.formdev.flatlaf.util.ColorFunctions;
 import com.formdev.flatlaf.util.FontUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
+import com.formdev.flatlaf.util.SystemFileChooser;
 import com.formdev.flatlaf.util.SystemInfo;
+import com.formdev.flatlaf.util.UIScale;
 import net.miginfocom.layout.ConstraintParser;
 import net.miginfocom.layout.LC;
 import net.miginfocom.layout.UnitValue;
@@ -71,6 +76,7 @@ class DemoFrame
 		Arrays.sort( availableFontFamilyNames );
 
 		initComponents();
+		initZommMenuItems();
 		updateFontMenuItems();
 		initAccentColors();
 		initFullWindowContent();
@@ -172,6 +178,48 @@ class DemoFrame
 		chooser.showSaveDialog( this );
 	}
 
+	private void openSystemActionPerformed() {
+		SystemFileChooser chooser = new SystemFileChooser();
+		chooser.setMultiSelectionEnabled( true );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Text Files", "txt", "md" ) );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"PDF Files", "pdf" ) );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Archives", "zip", "tar", "jar", "7z" ) );
+
+		if( chooser.showOpenDialog( this ) != SystemFileChooser.APPROVE_OPTION )
+			return;
+
+		File[] files = chooser.getSelectedFiles();
+		System.out.println( Arrays.toString( files ).replace( ",", "\n" ) );
+	}
+
+	private void saveAsSystemActionPerformed() {
+		SystemFileChooser chooser = new SystemFileChooser();
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Text Files", "txt", "md" ) );
+		chooser.addChoosableFileFilter( new SystemFileChooser.FileNameExtensionFilter(
+			"Images", "png", "gif", "jpg" ) );
+
+		if( chooser.showSaveDialog( this ) != SystemFileChooser.APPROVE_OPTION )
+			return;
+
+		File file = chooser.getSelectedFile();
+		System.out.println( file );
+	}
+
+	private void selectFolderSystemActionPerformed() {
+		SystemFileChooser chooser = new SystemFileChooser();
+		chooser.setFileSelectionMode( SystemFileChooser.DIRECTORIES_ONLY );
+
+		if( chooser.showOpenDialog( this ) != SystemFileChooser.APPROVE_OPTION )
+			return;
+
+		File directory  = chooser.getSelectedFile();
+		System.out.println( directory  );
+	}
+
 	private void exitActionPerformed() {
 		dispose();
 	}
@@ -286,6 +334,92 @@ class DemoFrame
 		showHints();
 	}
 
+	private void initZommMenuItems() {
+		float currentZoomFactor = UIScale.getZoomFactor();
+		UIScale.setSupportedZoomFactors( new float[] { 0.7f, 0.8f, 0.9f, 1f, 1.1f, 1.2f, 1.3f, 1.4f, 1.5f, 1.75f, 2f } );
+
+		ButtonGroup group = new ButtonGroup();
+		HashMap<Float, JCheckBoxMenuItem> items = new HashMap<>();
+
+		// add supported zoom factors to "Zoom" menu
+		zoomMenu.addSeparator();
+		for( float zoomFactor : UIScale.getSupportedZoomFactors() ) {
+			JCheckBoxMenuItem item = new JCheckBoxMenuItem( (int)(zoomFactor * 100) + "%" );
+			item.setSelected( zoomFactor == currentZoomFactor );
+			item.addActionListener( this::zoomFactorChanged );
+			zoomMenu.add( item );
+
+			group.add( item );
+			items.put( zoomFactor, item );
+		}
+
+		// update menu item selection if zoom factor changed
+		UIScale.addPropertyChangeListener( e -> {
+			if( UIScale.PROP_ZOOM_FACTOR.equals( e.getPropertyName() ) ) {
+				float newZoomFactor = UIScale.getZoomFactor();
+				JCheckBoxMenuItem item = items.get( newZoomFactor );
+				if( item != null )
+					item.setSelected( true );
+
+				zoomWindowBounds( this, (float) e.getOldValue(), (float) e.getNewValue() );
+			}
+		} );
+	}
+
+	private static void zoomWindowBounds( Window window, float oldZoomFactor, float newZoomFactor ) {
+		if( window instanceof Frame && ((Frame)window).getExtendedState() != Frame.NORMAL )
+			return;
+
+		Rectangle oldBounds = window.getBounds();
+
+		// zoom window bounds
+		float factor = (1f / oldZoomFactor) * newZoomFactor;
+		int newWidth = (int) (oldBounds.width * factor);
+		int newHeight = (int) (oldBounds.height * factor);
+		int newX = oldBounds.x - ((newWidth - oldBounds.width) / 2);
+		int newY = oldBounds.y - ((newHeight - oldBounds.height) / 2);
+
+		// get maximum window bounds (screen bounds minus screen insets)
+		GraphicsConfiguration gc = window.getGraphicsConfiguration();
+		Rectangle screenBounds = gc.getBounds();
+		Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
+		Rectangle maxBounds = FlatUIUtils.subtractInsets( screenBounds, screenInsets );
+
+		// limit new window width/height
+		newWidth = Math.min( newWidth, maxBounds.width );
+		newHeight = Math.min( newHeight, maxBounds.height );
+
+		// move window into screen bounds
+		newX = Math.max( Math.min( newX, maxBounds.width - newWidth ), maxBounds.x );
+		newY = Math.max( Math.min( newY, maxBounds.height - newHeight ), maxBounds.y );
+
+		// set new window bounds
+		window.setBounds( newX, newY, newWidth, newHeight );
+	}
+
+	private void zoomFactorChanged( ActionEvent e ) {
+		String zoomFactor = e.getActionCommand();
+		float zoom =  Integer.parseInt( zoomFactor.substring( 0, zoomFactor.length() - 1 ) ) / 100f;
+
+		if( UIScale.setZoomFactor( zoom ) )
+			FlatLaf.updateUI();
+	}
+
+	private void zoomReset() {
+		if( UIScale.zoomReset() )
+			FlatLaf.updateUI();
+	}
+
+	private void zoomIn() {
+		if( UIScale.zoomIn() )
+			FlatLaf.updateUI();
+	}
+
+	private void zoomOut() {
+		if( UIScale.zoomOut() )
+			FlatLaf.updateUI();
+	}
+
 	private void fontFamilyChanged( ActionEvent e ) {
 		String fontFamily = e.getActionCommand();
 
@@ -508,6 +642,9 @@ class DemoFrame
 		JMenuItem newMenuItem = new JMenuItem();
 		JMenuItem openMenuItem = new JMenuItem();
 		JMenuItem saveAsMenuItem = new JMenuItem();
+		JMenuItem openSystemMenuItem = new JMenuItem();
+		JMenuItem saveAsSystemMenuItem = new JMenuItem();
+		JMenuItem selectFolderSystemMenuItem = new JMenuItem();
 		JMenuItem closeMenuItem = new JMenuItem();
 		exitMenuItem = new JMenuItem();
 		JMenu editMenu = new JMenu();
@@ -533,6 +670,10 @@ class DemoFrame
 		JRadioButtonMenuItem radioButtonMenuItem1 = new JRadioButtonMenuItem();
 		JRadioButtonMenuItem radioButtonMenuItem2 = new JRadioButtonMenuItem();
 		JRadioButtonMenuItem radioButtonMenuItem3 = new JRadioButtonMenuItem();
+		zoomMenu = new JMenu();
+		JMenuItem resetZoomMenuItem = new JMenuItem();
+		JMenuItem incrZoomMenuItem = new JMenuItem();
+		JMenuItem decrZoomMenuItem = new JMenuItem();
 		fontMenu = new JMenu();
 		JMenuItem restoreFontMenuItem = new JMenuItem();
 		JMenuItem incrFontMenuItem = new JMenuItem();
@@ -608,6 +749,25 @@ class DemoFrame
 				fileMenu.add(saveAsMenuItem);
 				fileMenu.addSeparator();
 
+				//---- openSystemMenuItem ----
+				openSystemMenuItem.setText("Open (System)...");
+				openSystemMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.SHIFT_DOWN_MASK));
+				openSystemMenuItem.addActionListener(e -> openSystemActionPerformed());
+				fileMenu.add(openSystemMenuItem);
+
+				//---- saveAsSystemMenuItem ----
+				saveAsSystemMenuItem.setText("Save As (System)...");
+				saveAsSystemMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.SHIFT_DOWN_MASK));
+				saveAsSystemMenuItem.addActionListener(e -> saveAsSystemActionPerformed());
+				fileMenu.add(saveAsSystemMenuItem);
+
+				//---- selectFolderSystemMenuItem ----
+				selectFolderSystemMenuItem.setText("Select Folder (System)...");
+				selectFolderSystemMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.SHIFT_DOWN_MASK));
+				selectFolderSystemMenuItem.addActionListener(e -> selectFolderSystemActionPerformed());
+				fileMenu.add(selectFolderSystemMenuItem);
+				fileMenu.addSeparator();
+
 				//---- closeMenuItem ----
 				closeMenuItem.setText("Close");
 				closeMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
@@ -778,25 +938,49 @@ class DemoFrame
 			}
 			menuBar.add(viewMenu);
 
+			//======== zoomMenu ========
+			{
+				zoomMenu.setText("Zoom");
+
+				//---- resetZoomMenuItem ----
+				resetZoomMenuItem.setText("Reset Zoom");
+				resetZoomMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_0, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
+				resetZoomMenuItem.addActionListener(e -> zoomReset());
+				zoomMenu.add(resetZoomMenuItem);
+
+				//---- incrZoomMenuItem ----
+				incrZoomMenuItem.setText("Zoom In");
+				incrZoomMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
+				incrZoomMenuItem.addActionListener(e -> zoomIn());
+				zoomMenu.add(incrZoomMenuItem);
+
+				//---- decrZoomMenuItem ----
+				decrZoomMenuItem.setText("Zoom Out");
+				decrZoomMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
+				decrZoomMenuItem.addActionListener(e -> zoomOut());
+				zoomMenu.add(decrZoomMenuItem);
+			}
+			menuBar.add(zoomMenu);
+
 			//======== fontMenu ========
 			{
 				fontMenu.setText("Font");
 
 				//---- restoreFontMenuItem ----
 				restoreFontMenuItem.setText("Restore Font");
-				restoreFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_0, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
+				restoreFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_0, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.ALT_DOWN_MASK));
 				restoreFontMenuItem.addActionListener(e -> restoreFont());
 				fontMenu.add(restoreFontMenuItem);
 
 				//---- incrFontMenuItem ----
 				incrFontMenuItem.setText("Increase Font Size");
-				incrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
+				incrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.ALT_DOWN_MASK));
 				incrFontMenuItem.addActionListener(e -> incrFont());
 				fontMenu.add(incrFontMenuItem);
 
 				//---- decrFontMenuItem ----
 				decrFontMenuItem.setText("Decrease Font Size");
-				decrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
+				decrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()|KeyEvent.ALT_DOWN_MASK));
 				decrFontMenuItem.addActionListener(e -> decrFont());
 				fontMenu.add(decrFontMenuItem);
 			}
@@ -1045,6 +1229,7 @@ class DemoFrame
 	private JMenuItem exitMenuItem;
 	private JMenu scrollingPopupMenu;
 	private JMenuItem htmlMenuItem;
+	private JMenu zoomMenu;
 	private JMenu fontMenu;
 	private JMenu optionsMenu;
 	private JCheckBoxMenuItem windowDecorationsCheckBoxMenuItem;

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "8.2.1.0.348" Java: "21.0.1" encoding: "UTF-8"
+JFDML JFormDesigner: "8.3" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -182,6 +182,27 @@ new FormModel {
 						"mnemonic": 83
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "saveAsActionPerformed", false ) )
 					} )
+					add( new FormComponent( "javax.swing.JPopupMenu$Separator" ) {
+						name: "separator9"
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "openSystemMenuItem"
+						"text": "Open (System)..."
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 79, 4291, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "openSystemActionPerformed", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "saveAsSystemMenuItem"
+						"text": "Save As (System)..."
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 83, 4291, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "saveAsSystemActionPerformed", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "selectFolderSystemMenuItem"
+						"text": "Select Folder (System)..."
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 70, 4291, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "selectFolderSystemActionPerformed", false ) )
+					} )
 					add( new FormComponent( "javax.swing.JPopupMenu$Separator" ) {
 						name: "separator2"
 					} )
@@ -362,6 +383,31 @@ new FormModel {
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "menuItemActionPerformed", true ) )
 					} )
 				} )
+				add( new FormContainer( "javax.swing.JMenu", new FormLayoutManager( class javax.swing.JMenu ) ) {
+					name: "zoomMenu"
+					"text": "Zoom"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "resetZoomMenuItem"
+						"text": "Reset Zoom"
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 48, 4226, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "zoomReset", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "incrZoomMenuItem"
+						"text": "Zoom In"
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 521, 4226, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "zoomIn", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "decrZoomMenuItem"
+						"text": "Zoom Out"
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 45, 4226, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "zoomOut", false ) )
+					} )
+				} )
 				add( new FormContainer( "javax.swing.JMenu", new FormLayoutManager( class javax.swing.JMenu ) ) {
 					name: "fontMenu"
 					"text": "Font"
@@ -371,19 +417,19 @@ new FormModel {
 					add( new FormComponent( "javax.swing.JMenuItem" ) {
 						name: "restoreFontMenuItem"
 						"text": "Restore Font"
-						"accelerator": static javax.swing.KeyStroke getKeyStroke( 48, 4226, false )
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 48, 4746, false )
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "restoreFont", false ) )
 					} )
 					add( new FormComponent( "javax.swing.JMenuItem" ) {
 						name: "incrFontMenuItem"
 						"text": "Increase Font Size"
-						"accelerator": static javax.swing.KeyStroke getKeyStroke( 521, 4226, false )
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 521, 4746, false )
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "incrFont", false ) )
 					} )
 					add( new FormComponent( "javax.swing.JMenuItem" ) {
 						name: "decrFontMenuItem"
 						"text": "Decrease Font Size"
-						"accelerator": static javax.swing.KeyStroke getKeyStroke( 45, 4226, false )
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 45, 4746, false )
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "decrFont", false ) )
 					} )
 				} )

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

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

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

@@ -69,6 +69,7 @@ class TabsPanel
 		initTabWidthMode( widthPreferredTabbedPane, TABBED_PANE_TAB_WIDTH_MODE_PREFERRED );
 		initTabWidthMode( widthEqualTabbedPane, TABBED_PANE_TAB_WIDTH_MODE_EQUAL );
 		initTabWidthMode( widthCompactTabbedPane, TABBED_PANE_TAB_WIDTH_MODE_COMPACT );
+		initTabWidthMode( widthIconOnlyTabbedPane, TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY );
 	}
 
 	private void initTabPlacementTabs( JTabbedPane tabbedPane ) {
@@ -262,7 +263,9 @@ class TabsPanel
 
 	private void initTabWidthMode( JTabbedPane tabbedPane, String tabWidthMode ) {
 		tabbedPane.putClientProperty( TABBED_PANE_TAB_WIDTH_MODE, tabWidthMode );
-		if( tabWidthMode.equals( TABBED_PANE_TAB_WIDTH_MODE_COMPACT ) ) {
+		if( tabWidthMode.equals( TABBED_PANE_TAB_WIDTH_MODE_COMPACT ) ||
+			tabWidthMode.equals( TABBED_PANE_TAB_WIDTH_MODE_ICON_ONLY ) )
+		{
 			tabbedPane.addTab( "Search", new FlatSVGIcon( "com/formdev/flatlaf/demo/icons/search.svg", 16, 16 ), null );
 			tabbedPane.addTab( "Recents", new FlatSVGIcon( "com/formdev/flatlaf/demo/icons/RecentlyUsed.svg", 16, 16 ), null );
 			tabbedPane.addTab( "Favorites", new FlatSVGIcon( "com/formdev/flatlaf/demo/icons/favorite.svg", 16, 16 ), null );
@@ -390,6 +393,7 @@ class TabsPanel
 		widthPreferredTabbedPane = new JTabbedPane();
 		widthEqualTabbedPane = new JTabbedPane();
 		widthCompactTabbedPane = new JTabbedPane();
+		widthIconOnlyTabbedPane = new JTabbedPane();
 		JLabel minMaxTabWidthLabel = new JLabel();
 		minimumTabWidthTabbedPane = new JTabbedPane();
 		maximumTabWidthTabbedPane = new JTabbedPane();
@@ -684,6 +688,7 @@ class TabsPanel
 						"[]" +
 						"[]" +
 						"[]" +
+						"[]" +
 						"[]para" +
 						"[]" +
 						"[]" +
@@ -697,25 +702,56 @@ class TabsPanel
 					panel3.add(tabWidthModeLabel, "cell 0 0");
 
 					//---- tabWidthModeNoteLabel ----
-					tabWidthModeNoteLabel.setText("(preferred/equal/compact)");
+					tabWidthModeNoteLabel.setText("(preferred/equal/compact/iconOnly)");
 					tabWidthModeNoteLabel.setEnabled(false);
 					tabWidthModeNoteLabel.putClientProperty(FlatClientProperties.STYLE_CLASS, "small");
 					panel3.add(tabWidthModeNoteLabel, "cell 0 1");
+
+					//======== widthPreferredTabbedPane ========
+					{
+						widthPreferredTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+					}
 					panel3.add(widthPreferredTabbedPane, "cell 0 2");
+
+					//======== widthEqualTabbedPane ========
+					{
+						widthEqualTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+					}
 					panel3.add(widthEqualTabbedPane, "cell 0 3");
+
+					//======== widthCompactTabbedPane ========
+					{
+						widthCompactTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+					}
 					panel3.add(widthCompactTabbedPane, "cell 0 4");
 
+					//======== widthIconOnlyTabbedPane ========
+					{
+						widthIconOnlyTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+					}
+					panel3.add(widthIconOnlyTabbedPane, "cell 0 5");
+
 					//---- minMaxTabWidthLabel ----
 					minMaxTabWidthLabel.setText("Minimum/maximum tab width");
 					minMaxTabWidthLabel.putClientProperty(FlatClientProperties.STYLE_CLASS, "h3");
-					panel3.add(minMaxTabWidthLabel, "cell 0 5");
-					panel3.add(minimumTabWidthTabbedPane, "cell 0 6");
-					panel3.add(maximumTabWidthTabbedPane, "cell 0 7");
+					panel3.add(minMaxTabWidthLabel, "cell 0 6");
+
+					//======== minimumTabWidthTabbedPane ========
+					{
+						minimumTabWidthTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+					}
+					panel3.add(minimumTabWidthTabbedPane, "cell 0 7");
+
+					//======== maximumTabWidthTabbedPane ========
+					{
+						maximumTabWidthTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+					}
+					panel3.add(maximumTabWidthTabbedPane, "cell 0 8");
 
 					//---- tabAlignmentLabel ----
 					tabAlignmentLabel.setText("Tab title alignment");
 					tabAlignmentLabel.putClientProperty(FlatClientProperties.STYLE_CLASS, "h3");
-					panel3.add(tabAlignmentLabel, "cell 0 8");
+					panel3.add(tabAlignmentLabel, "cell 0 9");
 
 					//======== panel5 ========
 					{
@@ -742,17 +778,33 @@ class TabsPanel
 						tabAlignmentNoteLabel2.setEnabled(false);
 						tabAlignmentNoteLabel2.putClientProperty(FlatClientProperties.STYLE_CLASS, "small");
 						panel5.add(tabAlignmentNoteLabel2, "cell 1 0,alignx right,growx 0");
+
+						//======== tabAlignLeadingTabbedPane ========
+						{
+							tabAlignLeadingTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+						}
 						panel5.add(tabAlignLeadingTabbedPane, "cell 0 1");
 
 						//======== tabAlignVerticalTabbedPane ========
 						{
 							tabAlignVerticalTabbedPane.setTabPlacement(SwingConstants.LEFT);
+							tabAlignVerticalTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
 						}
 						panel5.add(tabAlignVerticalTabbedPane, "cell 1 1 1 4,growy");
+
+						//======== tabAlignCenterTabbedPane ========
+						{
+							tabAlignCenterTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+						}
 						panel5.add(tabAlignCenterTabbedPane, "cell 0 2");
+
+						//======== tabAlignTrailingTabbedPane ========
+						{
+							tabAlignTrailingTabbedPane.putClientProperty(FlatClientProperties.TABBED_PANE_TAB_HEIGHT, 28);
+						}
 						panel5.add(tabAlignTrailingTabbedPane, "cell 0 3");
 					}
-					panel3.add(panel5, "cell 0 9");
+					panel3.add(panel5, "cell 0 10");
 				}
 				panel6.add(panel3, "cell 2 0");
 			}
@@ -1027,6 +1079,7 @@ class TabsPanel
 	private JTabbedPane widthPreferredTabbedPane;
 	private JTabbedPane widthEqualTabbedPane;
 	private JTabbedPane widthCompactTabbedPane;
+	private JTabbedPane widthIconOnlyTabbedPane;
 	private JTabbedPane minimumTabWidthTabbedPane;
 	private JTabbedPane maximumTabWidthTabbedPane;
 	private JPanel panel5;

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "8.2.0.0.331" Java: "21" encoding: "UTF-8"
+JFDML JFormDesigner: "8.3" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -337,7 +337,7 @@ new FormModel {
 					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 						"$layoutConstraints": "insets 0,hidemode 3"
 						"$columnConstraints": "[grow,fill]"
-						"$rowConstraints": "[]0[][][][]para[][][]para[]0[]"
+						"$rowConstraints": "[]0[][][][][]para[][][]para[]0[]"
 					} ) {
 						name: "panel3"
 						auxiliary() {
@@ -355,7 +355,7 @@ new FormModel {
 						} )
 						add( new FormComponent( "javax.swing.JLabel" ) {
 							name: "tabWidthModeNoteLabel"
-							"text": "(preferred/equal/compact)"
+							"text": "(preferred/equal/compact/iconOnly)"
 							"enabled": false
 							"$client.FlatLaf.styleClass": "small"
 							auxiliary() {
@@ -366,19 +366,28 @@ new FormModel {
 						} )
 						add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
 							name: "widthPreferredTabbedPane"
+							"$client.JTabbedPane.tabHeight": 28
 						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 							"value": "cell 0 2"
 						} )
 						add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
 							name: "widthEqualTabbedPane"
+							"$client.JTabbedPane.tabHeight": 28
 						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 							"value": "cell 0 3"
 						} )
 						add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
 							name: "widthCompactTabbedPane"
+							"$client.JTabbedPane.tabHeight": 28
 						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 							"value": "cell 0 4"
 						} )
+						add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
+							name: "widthIconOnlyTabbedPane"
+							"$client.JTabbedPane.tabHeight": 28
+						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+							"value": "cell 0 5"
+						} )
 						add( new FormComponent( "javax.swing.JLabel" ) {
 							name: "minMaxTabWidthLabel"
 							"text": "Minimum/maximum tab width"
@@ -386,19 +395,21 @@ new FormModel {
 							auxiliary() {
 								"JavaCodeGenerator.variableLocal": true
 							}
-						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-							"value": "cell 0 5"
-						} )
-						add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
-							name: "minimumTabWidthTabbedPane"
 						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 							"value": "cell 0 6"
 						} )
 						add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
-							name: "maximumTabWidthTabbedPane"
+							name: "minimumTabWidthTabbedPane"
+							"$client.JTabbedPane.tabHeight": 28
 						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 							"value": "cell 0 7"
 						} )
+						add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
+							name: "maximumTabWidthTabbedPane"
+							"$client.JTabbedPane.tabHeight": 28
+						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+							"value": "cell 0 8"
+						} )
 						add( new FormComponent( "javax.swing.JLabel" ) {
 							name: "tabAlignmentLabel"
 							"text": "Tab title alignment"
@@ -407,7 +418,7 @@ new FormModel {
 								"JavaCodeGenerator.variableLocal": true
 							}
 						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-							"value": "cell 0 8"
+							"value": "cell 0 9"
 						} )
 						add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 							"$columnConstraints": "[grow,fill]para[fill]"
@@ -439,27 +450,31 @@ new FormModel {
 							} )
 							add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
 								name: "tabAlignLeadingTabbedPane"
+								"$client.JTabbedPane.tabHeight": 28
 							}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 								"value": "cell 0 1"
 							} )
 							add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
 								name: "tabAlignVerticalTabbedPane"
 								"tabPlacement": 2
+								"$client.JTabbedPane.tabHeight": 28
 							}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 								"value": "cell 1 1 1 4,growy"
 							} )
 							add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
 								name: "tabAlignCenterTabbedPane"
+								"$client.JTabbedPane.tabHeight": 28
 							}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 								"value": "cell 0 2"
 							} )
 							add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
 								name: "tabAlignTrailingTabbedPane"
+								"$client.JTabbedPane.tabHeight": 28
 							}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 								"value": "cell 0 3"
 							} )
 						}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-							"value": "cell 0 9"
+							"value": "cell 0 10"
 						} )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 						"value": "cell 2 0"

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

@@ -43,7 +43,8 @@ public class FlatDesktop
 	public static boolean isSupported( Action action ) {
 		if( SystemInfo.isJava_9_orLater ) {
 			try {
-				return Desktop.getDesktop().isSupported( Enum.valueOf( Desktop.Action.class, action.name() ) );
+				return Desktop.isDesktopSupported() &&
+					Desktop.getDesktop().isSupported( Enum.valueOf( Desktop.Action.class, action.name() ) );
 			} catch( Exception ex ) {
 				LoggingFacade.INSTANCE.logSevere( null, ex );
 				return false;

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

@@ -524,7 +524,9 @@ public class FlatSVGIcon
 	private URL getIconURL( String name, boolean dark ) {
 		if( dark ) {
 			int dotIndex = name.lastIndexOf( '.' );
-			name = name.substring( 0, dotIndex ) + "_dark" + name.substring( dotIndex );
+			name = (dotIndex > 0)
+				? name.substring( 0, dotIndex ) + "_dark" + name.substring( dotIndex )
+				: name + "_dark";
 		}
 
 		ClassLoader cl = (classLoader != null) ? classLoader : FlatSVGIcon.class.getClassLoader();

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

@@ -30,6 +30,7 @@ import java.util.HashSet;
 import java.util.Locale;
 import java.util.Properties;
 import java.util.Map.Entry;
+import java.util.concurrent.atomic.AtomicReference;
 import java.util.Set;
 import java.util.function.Predicate;
 import java.util.prefs.Preferences;
@@ -202,6 +203,7 @@ public class FlatUIDefaultsInspector
 		JFrame frame = new JFrame();
 		frame.setTitle( "UI Defaults Inspector" );
 		frame.setDefaultCloseOperation( WindowConstants.DISPOSE_ON_CLOSE );
+		frame.setModalExclusionType( Dialog.ModalExclusionType.TOOLKIT_EXCLUDE );
 		frame.addWindowListener( new WindowAdapter() {
 			@Override
 			public void windowClosed( WindowEvent e ) {
@@ -309,7 +311,7 @@ public class FlatUIDefaultsInspector
 		Set<Entry<Object, Object>> defaultsSet = defaults.entrySet();
 		ArrayList<Item> items = new ArrayList<>( defaultsSet.size() );
 		HashSet<Object> keys = new HashSet<>( defaultsSet.size() );
-		Color[] pBaseColor = new Color[1];
+		AtomicReference<Color> pBaseColor = new AtomicReference<>();
 		for( Entry<Object,Object> e : defaultsSet ) {
 			Object key = e.getKey();
 
@@ -335,7 +337,7 @@ public class FlatUIDefaultsInspector
 			if( value instanceof DerivedColor ) {
 				Color resolvedColor = resolveDerivedColor( defaults, (String) key, (DerivedColor) value, pBaseColor );
 				if( resolvedColor != value )
-					info = new Color[] { resolvedColor, pBaseColor[0] };
+					info = new Color[] { resolvedColor, pBaseColor.get() };
 			}
 
 			// check whether key was overridden using UIManager.put(key,value)
@@ -350,9 +352,9 @@ public class FlatUIDefaultsInspector
 		return items.toArray( new Item[items.size()] );
 	}
 
-	private Color resolveDerivedColor( UIDefaults defaults, String key, Color color, Color[] pBaseColor ) {
+	private Color resolveDerivedColor( UIDefaults defaults, String key, Color color, AtomicReference<Color> pBaseColor ) {
 		if( pBaseColor != null )
-			pBaseColor[0] = null;
+			pBaseColor.set( null );
 
 		if( !(color instanceof DerivedColor) )
 			return color;
@@ -376,7 +378,7 @@ public class FlatUIDefaultsInspector
 			baseColor = resolveDerivedColor( defaults, (String) baseKey, baseColor, null );
 
 		if( pBaseColor != null )
-			pBaseColor[0] = baseColor;
+			pBaseColor.set( baseColor );
 
 		Color newColor = FlatUIUtils.deriveColor( color, baseColor );
 
@@ -775,6 +777,9 @@ public class FlatUIDefaultsInspector
 
 		@SuppressWarnings( "FormatString" ) // Error Prone
 		private static String color2hex( Color color ) {
+			if( color == null )
+				return "";
+
 			int rgb = color.getRGB();
 			boolean hasAlpha = color.getAlpha() != 255;
 
@@ -1016,28 +1021,36 @@ public class FlatUIDefaultsInspector
 			item = (Item) value;
 			init( table, item.key, isSelected, row );
 
-			// reset background, foreground and icon
-			if( !(item.value instanceof Color) ) {
+			// get color of value
+			valueColor = null;
+			if( item.value instanceof Color )
+				valueColor = (item.info instanceof Color[]) ? ((Color[])item.info)[0] : (Color) item.value;
+			else if( item.value instanceof FlatLineBorder )
+				valueColor = ((FlatLineBorder)item.value).getLineColor();
+
+			// reset background and foreground
+			if( valueColor == null ) {
 				setBackground( null );
 				setForeground( null );
 			}
-			if( !(item.value instanceof Icon) )
-				setIcon( null );
 
 			// value to string
 			value = item.getValueAsString();
 
 			super.getTableCellRendererComponent( table, value, isSelected, hasFocus, row, column );
 
-			if( item.value instanceof Color ) {
-				Color color = (item.info instanceof Color[]) ? ((Color[])item.info)[0] : (Color) item.value;
-				boolean isDark = new HSLColor( color ).getLuminance() < 70 && color.getAlpha() >= 128;
-				valueColor = color;
+			// set foreground, if value has color
+			if( valueColor != null ) {
+				boolean isDark = new HSLColor( valueColor ).getLuminance() < 70 && valueColor.getAlpha() >= 128;
 				setForeground( isDark ? Color.white : Color.black );
-			} else if( item.value instanceof Icon ) {
+			}
+
+			// set icon
+			if( item.value instanceof Icon ) {
 				Icon icon = (Icon) item.value;
 				setIcon( new SafeIcon( icon ) );
-			}
+			} else
+				setIcon( null );
 
 			// set tooltip
 			String toolTipText = (item.value instanceof Object[])
@@ -1054,7 +1067,7 @@ public class FlatUIDefaultsInspector
 
 		@Override
 		protected void paintComponent( Graphics g ) {
-			if( item.value instanceof Color ) {
+			if( valueColor != null ) {
 				int width = getWidth();
 				int height = getHeight();
 				Color background = valueColor;

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTabbedPane.java

@@ -484,7 +484,7 @@ public class FlatTabbedPane
 
 
 	// NOTE: enum names must be equal to allowed strings
-	public enum TabWidthMode { preferred, equal, compact }
+	public enum TabWidthMode { preferred, equal, compact, /** @since 3.7 */ iconOnly }
 
 	/**
 	 * Returns how the tabs should be sized.

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

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

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

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

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

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

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

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

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

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

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

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

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

@@ -40,6 +40,11 @@ var javaHome = System.getProperty( "java.home" )
 if( javaHome.endsWith( "jre" ) && !file( "${javaHome}/include" ).exists() )
 	javaHome += "/.."
 
+interface InjectedOps {
+	@get:Inject val fs: FileSystemOperations
+	@get:Inject val e: ExecOperations
+}
+
 tasks {
 	register( "build-natives" ) {
 		group = "build"
@@ -65,15 +70,37 @@ tasks {
 
 		includes.from(
 			"${javaHome}/include",
-			"${javaHome}/include/linux"
+			"${javaHome}/include/linux",
+
+			// for GTK
+			"/usr/include/gtk-3.0",
+			"/usr/include/glib-2.0",
+			if( name.contains( "X86-64" ) ) "/usr/lib/x86_64-linux-gnu/glib-2.0/include"
+									   else "/usr/lib/aarch64-linux-gnu/glib-2.0/include",
+			"/usr/include/gdk-pixbuf-2.0",
+			"/usr/include/atk-1.0",
+			"/usr/include/cairo",
+			"/usr/include/pango-1.0",
+			"/usr/include/harfbuzz",
 		)
 
 		compilerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf()
+				is Gcc, is Clang -> listOf( "-fvisibility=hidden" )
 				else -> emptyList()
 			}
 		} )
+
+		doFirst {
+			// check required Java version
+			if( JavaVersion.current() < JavaVersion.VERSION_11 ) {
+				println()
+				println( "WARNING: Java 11 or later required to build Linux native library (running ${System.getProperty( "java.version" )})" )
+				println( "         Native library built with older Java versions throw following exception when running in Java 17+:" )
+				println( "         java.lang.UnsatisfiedLinkError: .../libjawt.so: version `SUNWprivate_1.1' not found" )
+				println()
+			}
+		}
 	}
 
 	withType<LinkSharedLibrary>().configureEach {
@@ -88,21 +115,23 @@ tasks {
 
 		linkerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf( "-L${jawtPath}", "-l${jawt}" )
+				is Gcc, is Clang -> listOf( "-L${jawtPath}", "-l${jawt}", "-lgtk-3" )
 				else -> emptyList()
 			}
 		} )
 
+		val injectedOps = project.objects.newInstance<InjectedOps>()
+
 		doLast {
 			// copy shared library to flatlaf-core resources
-			copy {
+			injectedOps.fs.copy {
 				from( linkedFile )
 				into( nativesDir )
 				rename( linkedFile.get().asFile.name, libraryName )
 			}
-
-//			dump( linkedFile.asFile.get(), true )
 		}
+
+//		dump( linkedFile, true, injectedOps )
 	}
 
 	if( org.gradle.internal.os.OperatingSystem.current().isLinux &&
@@ -128,7 +157,20 @@ tasks {
 				"-I", "${javaHome}/include/linux",
 				"-I", "$include",
 
+				// for GTK
+				"-I", "/usr/include/gtk-3.0",
+				"-I", "/usr/include/glib-2.0",
+				"-I", "/usr/lib/x86_64-linux-gnu/glib-2.0/include",
+				"-I", "/usr/include/gdk-pixbuf-2.0",
+				"-I", "/usr/include/atk-1.0",
+				"-I", "/usr/include/cairo",
+				"-I", "/usr/include/pango-1.0",
+				"-I", "/usr/include/harfbuzz",
+
 				"$src/ApiVersion.cpp",
+				"$src/GtkFileChooser.cpp",
+				"$src/GtkMessageDialog.cpp",
+				"$src/JNIUtils.cpp",
 				"$src/X11WmUtils.cpp",
 			)
 		}
@@ -152,49 +194,55 @@ tasks {
 				"-o", "$outDir/$libraryName",
 
 				"$objDir/ApiVersion.o",
+				"$objDir/GtkFileChooser.o",
+				"$objDir/GtkMessageDialog.o",
+				"$objDir/JNIUtils.o",
 				"$objDir/X11WmUtils.o",
 
+				"-lstdc++",
 				"-L${layout.projectDirectory}/lib/aarch64",
 				"-ljawt",
+				"-lgtk-3",
 			)
 
+			val injectedOps = project.objects.newInstance<InjectedOps>()
+
 			doLast {
 				// copy shared library to flatlaf-core resources
-				copy {
+				injectedOps.fs.copy {
 					from( "$outDir/$libraryName" )
 					into( nativesDir )
 				}
-
-//				dump( file( "$outDir/$libraryName" ), false )
 			}
+
+//			dump( file( "$outDir/$libraryName" ), false, injectedOps )
 		}
 	}
 }
 
 /*dump
-interface InjectedExecOps { @get:Inject val execOps: ExecOperations }
-val injected = project.objects.newInstance<InjectedExecOps>()
-
-fun dump( dylib: File, disassemble: Boolean ) {
-
-	val dylibDir = dylib.parent
-	injected.execOps.exec { commandLine( "size", dylib ); standardOutput = FileOutputStream( "$dylibDir/size.txt" ) }
-	injected.execOps.exec {
-		commandLine( "objdump",
-			// commands
-			"--archive-headers",
-			"--section-headers",
-			"--private-headers",
-			"--reloc",
-			"--dynamic-reloc",
-			"--syms",
-			// files
-			dylib )
-		standardOutput = FileOutputStream( "$dylibDir/objdump.txt" )
+fun Task.dump( f: Any, disassemble: Boolean, injectedOps: InjectedOps ) {
+	doLast {
+		val dylib = if( f is RegularFileProperty) f.get().asFile else f as File
+		val dylibDir = dylib.parent
+		injectedOps.e.exec { commandLine( "size", dylib ); standardOutput = FileOutputStream( "$dylibDir/size.txt" ) }
+		injectedOps.e.exec {
+			commandLine( "objdump",
+				// commands
+				"--archive-headers",
+				"--section-headers",
+				"--private-headers",
+				"--reloc",
+				"--dynamic-reloc",
+				"--syms",
+				// files
+				dylib )
+			standardOutput = FileOutputStream( "$dylibDir/objdump.txt" )
+		}
+		if( disassemble )
+			injectedOps.e.exec { commandLine( "objdump", "--disassemble-all", dylib ); standardOutput = FileOutputStream( "$dylibDir/disassemble.txt" ) }
+		injectedOps.e.exec { commandLine( "objdump", "--full-contents", dylib ); standardOutput = FileOutputStream( "$dylibDir/full-contents.txt" ) }
+		injectedOps.e.exec { commandLine( "hexdump", dylib ); standardOutput = FileOutputStream( "$dylibDir/hexdump.txt" ) }
 	}
-	if( disassemble )
-		injected.execOps.exec { commandLine( "objdump", "--disassemble-all", dylib ); standardOutput = FileOutputStream( "$dylibDir/disassemble.txt" ) }
-	injected.execOps.exec { commandLine( "objdump", "--full-contents", dylib ); standardOutput = FileOutputStream( "$dylibDir/full-contents.txt" ) }
-	injected.execOps.exec { commandLine( "hexdump", dylib ); standardOutput = FileOutputStream( "$dylibDir/hexdump.txt" ) }
 }
 dump*/

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

@@ -24,7 +24,7 @@
 
 // increase this version if changing API or functionality of native library
 // also update version in Java class com.formdev.flatlaf.ui.FlatNativeLinuxLibrary
-#define API_VERSION_LINUX		3001
+#define API_VERSION_LINUX		3003
 
 
 //---- JNI methods ------------------------------------------------------------

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

@@ -0,0 +1,307 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <jawt.h>
+#include <linux/jawt_md.h>
+#include <gtk/gtk.h>
+#include <gdk/gdkx.h>
+#include <glib/gi18n.h>
+#include "JNIUtils.h"
+#include "com_formdev_flatlaf_ui_FlatNativeLinuxLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+// declare external methods
+extern Window getWindowHandle( JNIEnv* env, JAWT* awt, jobject window, Display** display_return );
+
+// declare internal methods
+static jobjectArray fileListToStringArray( JNIEnv* env, GSList* fileList );
+
+//---- helper -----------------------------------------------------------------
+
+#define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_ ## option) != 0)
+#define isOptionClear( option ) ((optionsClear & com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_ ## option) != 0)
+#define isOptionSetOrClear( option ) isOptionSet( option ) || isOptionClear( option )
+
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+	jclass stringClass = env->FindClass( "java/lang/String" );
+	return env->NewObjectArray( count, stringClass, NULL );
+}
+
+static void initFilters( GtkFileChooser* chooser, JNIEnv* env, jint fileTypeIndex, jobjectArray fileTypes ) {
+	jint length = env->GetArrayLength( fileTypes );
+	if( length <= 0 )
+		return;
+
+	GtkFileFilter* filter = NULL;
+	int filterIndex = 0;
+	for( int i = 0; i < length; i++ ) {
+		jstring jstr = (jstring) env->GetObjectArrayElement( fileTypes, i );
+		if( jstr == NULL ) {
+			if( filter != NULL ) {
+				gtk_file_chooser_add_filter( chooser, filter );
+				if( fileTypeIndex == filterIndex )
+					gtk_file_chooser_set_filter( chooser, filter );
+				filter = NULL;
+				filterIndex++;
+			}
+			continue;
+		}
+
+		AutoReleaseStringUTF8 str( env, jstr );
+		if( filter == NULL ) {
+			filter = gtk_file_filter_new();
+			gtk_file_filter_set_name( filter, str );
+		} else
+			gtk_file_filter_add_pattern( filter, str );
+	}
+}
+
+static GdkWindow* getGdkWindow( JNIEnv* env, jobject window ) {
+	// get the AWT
+	JAWT awt;
+	awt.version = JAWT_VERSION_1_4;
+	if( !JAWT_GetAWT( env, &awt ) )
+		return NULL;
+
+	// get Xlib window and display from AWT window
+	Display* display;
+	Window w = getWindowHandle( env, &awt, window, &display );
+	if( w == 0 )
+		return NULL;
+
+	// based on GetAllocNativeWindowHandle() from https://github.com/btzy/nativefiledialog-extended
+	// https://github.com/btzy/nativefiledialog-extended/blob/29e3bcb578345b9fa345d1d7683f00c150565ca3/src/nfd_gtk.cpp#L384-L437
+	GdkDisplay* gdkDisplay = gdk_x11_lookup_xdisplay( display );
+	if( gdkDisplay == NULL ) {
+		// search for existing X11 display (there should only be one, even if multiple screens are connected)
+		GdkDisplayManager* displayManager = gdk_display_manager_get();
+		GSList* displays = gdk_display_manager_list_displays( displayManager );
+		for( GSList* l = displays; l; l = l->next ) {
+			if( GDK_IS_X11_DISPLAY( l->data ) ) {
+				gdkDisplay = GDK_DISPLAY( l->data );
+				break;
+			}
+		}
+		g_slist_free( displays );
+
+		// create our own X11 display
+		if( gdkDisplay == NULL ) {
+			gdk_set_allowed_backends( "x11" );
+			gdkDisplay = gdk_display_manager_open_display( displayManager, NULL );
+			gdk_set_allowed_backends( NULL );
+
+			if( gdkDisplay == NULL )
+				return NULL;
+		}
+	}
+
+	return gdk_x11_window_foreign_new_for_display( gdkDisplay, w );
+}
+
+static void handle_realize( GtkWidget* dialog, gpointer data ) {
+	GdkWindow* gdkOwner = static_cast<GdkWindow*>( data );
+
+	// make file dialog a transient of owner window,
+	// which centers file dialog on owner and keeps file dialog above owner
+	gdk_window_set_transient_for( gtk_widget_get_window( dialog ), gdkOwner );
+
+	// necessary because gdk_x11_window_foreign_new_for_display() increases the reference counter
+	g_object_unref( gdkOwner );
+}
+
+struct ResponseData {
+	JNIEnv* env;
+	jobject callback;
+	GSList* fileList;
+
+	ResponseData( JNIEnv* _env, jobject _callback ) {
+		env = _env;
+		callback = _callback;
+		fileList = NULL;
+	}
+};
+
+static void handle_response( GtkWidget* dialog, gint responseId, gpointer data ) {
+	// get filenames if user pressed OK
+	if( responseId == GTK_RESPONSE_ACCEPT ) {
+		ResponseData *response = static_cast<ResponseData*>( data );
+		if( response->callback != NULL ) {
+			GSList* fileList = gtk_file_chooser_get_filenames( GTK_FILE_CHOOSER( dialog ) );
+			jobjectArray files = fileListToStringArray( response->env, fileList );
+
+			GtkWindow* window = GTK_WINDOW( dialog );
+
+			// invoke callback: boolean approve( String[] files, long hwnd );
+			jclass cls = response->env->GetObjectClass( response->callback );
+			jmethodID approveID = response->env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+			if( approveID != NULL && !response->env->CallBooleanMethod( response->callback, approveID, files, window ) )
+				return; // keep dialog open
+		}
+
+		response->fileList = gtk_file_chooser_get_filenames( GTK_FILE_CHOOSER( dialog ) );
+	}
+
+	// hide/destroy file dialog and quit loop
+	gtk_widget_hide( dialog );
+	gtk_widget_destroy( dialog );
+	gtk_main_quit();
+}
+
+//---- JNI methods ------------------------------------------------------------
+
+extern "C"
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showFileChooser
+	( JNIEnv* env, jclass cls, jobject owner, jint dark, jboolean open,
+		jstring title, jstring okButtonLabel, jstring currentName, jstring currentFolder,
+		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+{
+	// initialize GTK
+	if( !gtk_init_check( NULL, NULL ) )
+		return NULL;
+
+	// convert Java strings to C strings
+	AutoReleaseStringUTF8 ctitle( env, title );
+	AutoReleaseStringUTF8 cokButtonLabel( env, okButtonLabel );
+	AutoReleaseStringUTF8 ccurrentName( env, currentName );
+	AutoReleaseStringUTF8 ccurrentFolder( env, currentFolder );
+
+	// create GTK file chooser dialog
+	// https://docs.gtk.org/gtk3/class.FileChooserDialog.html
+	bool selectFolder = isOptionSet( FC_select_folder );
+	bool multiSelect = isOptionSet( FC_select_multiple );
+	GtkWidget* dialog = gtk_file_chooser_dialog_new(
+		(ctitle != NULL) ? ctitle
+			: (selectFolder ? (multiSelect ? _("Select Folders") : _("Select Folder"))
+				: (open ? ((multiSelect ? _("Open Files") : _("Open File"))) : _("Save File"))),
+		NULL, // can not use AWT X11 window as parent because GtkWindow is required
+		selectFolder ? GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER
+			: (open ? GTK_FILE_CHOOSER_ACTION_OPEN : GTK_FILE_CHOOSER_ACTION_SAVE),
+		_("_Cancel"), GTK_RESPONSE_CANCEL,
+		(cokButtonLabel != NULL) ? cokButtonLabel
+			: (selectFolder ? _("_Select") : (open ? _("_Open") : _("_Save"))), GTK_RESPONSE_ACCEPT,
+		NULL ); // marks end of buttons
+	GtkFileChooser* chooser = GTK_FILE_CHOOSER( dialog );
+
+	// set current name and folder
+	if( !open && ccurrentName != NULL )
+		gtk_file_chooser_set_current_name( chooser, ccurrentName );
+	if( ccurrentFolder != NULL )
+		gtk_file_chooser_set_current_folder( chooser, ccurrentFolder );
+
+	// set options
+	if( isOptionSetOrClear( FC_select_multiple ) )
+		gtk_file_chooser_set_select_multiple( chooser, isOptionSet( FC_select_multiple ) );
+	if( isOptionSetOrClear( FC_show_hidden ) )
+		gtk_file_chooser_set_show_hidden( chooser, isOptionSet( FC_show_hidden ) );
+	if( isOptionSetOrClear( FC_local_only ) )
+		gtk_file_chooser_set_local_only( chooser, isOptionSet( FC_local_only ) );
+	if( isOptionSetOrClear( FC_do_overwrite_confirmation ) )
+		gtk_file_chooser_set_do_overwrite_confirmation( chooser, isOptionSet( FC_do_overwrite_confirmation ) );
+	if( isOptionSetOrClear( FC_create_folders ) )
+		gtk_file_chooser_set_create_folders( chooser, isOptionSet( FC_create_folders ) );
+
+	// initialize filter
+	initFilters( chooser, env, fileTypeIndex, fileTypes );
+
+	// setup modality
+	GdkWindow* gdkOwner = (owner != NULL) ? getGdkWindow( env, owner ) : NULL;
+	if( gdkOwner != NULL ) {
+		gtk_window_set_modal( GTK_WINDOW( dialog ), true );
+
+		// file dialog should use same screen as owner
+		GdkScreen* screen = gdk_window_get_screen( gdkOwner );
+		gtk_window_set_screen( GTK_WINDOW( dialog ), screen );
+
+		// set the transient when the file dialog is realized
+		g_signal_connect( dialog, "realize", G_CALLBACK( handle_realize ), gdkOwner );
+
+		// set light/dark appearance
+		if( dark >= 0 ) {
+			GtkSettings *settings = gtk_settings_get_for_screen( screen );
+
+			// get current GTK theme
+			gchar* currentGtkTheme;
+			g_object_get( settings, "gtk-theme-name", &currentGtkTheme, NULL );
+
+			const char* darkSuffix = "-dark";
+			bool isDarkGtkTheme = g_str_has_suffix( currentGtkTheme, darkSuffix );
+			if( isDarkGtkTheme && dark == 0 ) {
+				// current GTK theme is dark, but FlatLaf theme is light
+				// in this case, "gtk-application-prefer-dark-theme" does not work
+				// and there is no "gtk-application-prefer-light-theme" setting
+				// --> try to switch to light GTK theme (if available)
+				gchar* lightGtkTheme = g_strndup( currentGtkTheme, strlen( currentGtkTheme ) - strlen( darkSuffix ) );
+				gchar* themeDir = g_strdup_printf( "/usr/share/themes/%s", lightGtkTheme );
+				if( g_file_test( themeDir, G_FILE_TEST_IS_DIR ) )
+					g_object_set( settings, "gtk-theme-name", lightGtkTheme, NULL );
+				g_free( themeDir );
+				g_free( lightGtkTheme );
+			}
+
+			g_free( currentGtkTheme );
+
+			// let GTK know whether we prefer a dark theme
+			g_object_set( settings, "gtk-application-prefer-dark-theme", (dark == 1), NULL );
+		}
+	}
+
+	// show dialog
+	// (similar to what's done in sun_awt_X11_GtkFileDialogPeer.c)
+	ResponseData responseData( env, callback );
+	g_signal_connect( dialog, "response", G_CALLBACK( handle_response ), &responseData );
+	gtk_widget_show( dialog );
+
+	// necessary to bring file dialog to the front (and make it active)
+	// see issues:
+	//     https://github.com/btzy/nativefiledialog-extended/issues/31
+	//     https://github.com/mlabbe/nativefiledialog/pull/92
+	//     https://github.com/guillaumechereau/noc/pull/11
+	if( GDK_IS_X11_DISPLAY( gtk_widget_get_display( GTK_WIDGET( dialog ) ) ) ) {
+		GdkWindow* gdkWindow = gtk_widget_get_window( GTK_WIDGET( dialog ) );
+		gdk_window_set_events( gdkWindow, static_cast<GdkEventMask>( gdk_window_get_events( gdkWindow ) | GDK_PROPERTY_CHANGE_MASK ) );
+		gtk_window_present_with_time( GTK_WINDOW( dialog ), gdk_x11_get_server_time( gdkWindow ) );
+	}
+
+	// start event loop (will be quit in respone handler)
+	gtk_main();
+
+	// canceled?
+	if( responseData.fileList == NULL )
+		return newJavaStringArray( env, 0 );
+
+	// convert GSList to Java string array
+	return fileListToStringArray( env, responseData.fileList );
+}
+
+static jobjectArray fileListToStringArray( JNIEnv* env, GSList* fileList ) {
+	guint count = g_slist_length( fileList );
+	jobjectArray array = newJavaStringArray( env, count );
+	GSList* it = fileList;
+	for( int i = 0; i < count; i++, it = it->next ) {
+		gchar* path = (gchar*) it->data;
+		jstring jpath = env->NewStringUTF( path );
+		g_free( path );
+
+		env->SetObjectArrayElement( array, i, jpath );
+		env->DeleteLocalRef( jpath );
+	}
+	g_slist_free( fileList );
+	return array;
+}

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

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <jawt.h>
+#include <linux/jawt_md.h>
+#include <gtk/gtk.h>
+#include <gdk/gdkx.h>
+#include <glib/gi18n.h>
+#include "JNIUtils.h"
+#include "com_formdev_flatlaf_ui_FlatNativeLinuxLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+extern "C"
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showMessageDialog
+	( JNIEnv* env, jclass cls, jlong hwndParent, jint messageType, jstring primaryText, jstring secondaryText,
+		jint defaultButton, jobjectArray buttons )
+{
+	GtkWindow* window = (GtkWindow*) hwndParent;
+
+	// convert message type
+	GtkMessageType gmessageType;
+	switch( messageType ) {
+		case /* JOptionPane.ERROR_MESSAGE */       0: gmessageType = GTK_MESSAGE_ERROR; break;
+		case /* JOptionPane.INFORMATION_MESSAGE */ 1: gmessageType = GTK_MESSAGE_INFO; break;
+		case /* JOptionPane.WARNING_MESSAGE */     2: gmessageType = GTK_MESSAGE_WARNING; break;
+		case /* JOptionPane.QUESTION_MESSAGE */    3: gmessageType = GTK_MESSAGE_QUESTION; break;
+		default:
+		case /* JOptionPane.PLAIN_MESSAGE */      -1: gmessageType = GTK_MESSAGE_OTHER; break;
+	}
+
+	// convert Java strings to C strings
+	AutoReleaseStringUTF8 cprimaryText( env, primaryText );
+	AutoReleaseStringUTF8 csecondaryText( env, secondaryText );
+
+	// create GTK file chooser dialog
+	// https://docs.gtk.org/gtk3/class.MessageDialog.html
+	jint buttonCount = env->GetArrayLength( buttons );
+	GtkWidget* dialog = gtk_message_dialog_new( window, GTK_DIALOG_MODAL, gmessageType,
+		(buttonCount > 0) ? GTK_BUTTONS_NONE : GTK_BUTTONS_OK,
+		"%s", (const gchar*) cprimaryText );
+	if( csecondaryText != NULL )
+		gtk_message_dialog_format_secondary_text( GTK_MESSAGE_DIALOG( dialog ), "%s", (const gchar*) csecondaryText );
+
+	// add buttons
+	for( int i = 0; i < buttonCount; i++ ) {
+		AutoReleaseStringUTF8 str( env, (jstring) env->GetObjectArrayElement( buttons, i ) );
+		gtk_dialog_add_button( GTK_DIALOG( dialog ), str, i );
+	}
+
+	// set default button
+	gtk_dialog_set_default_response( GTK_DIALOG( dialog ), MIN( MAX( defaultButton, 0 ), buttonCount - 1 ) );
+
+	// show message dialog
+	gint responseID = gtk_dialog_run( GTK_DIALOG( dialog ) );
+	gtk_widget_destroy( dialog );
+
+	// return -1 if closed with ESC key
+	return (responseID >= 0) ? responseID : -1;
+}

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

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include <dlfcn.h>
+#include "JNIUtils.h"
+
+/**
+ * @author Karl Tauber
+ */
+
+//---- class AutoReleaseStringUTF8 --------------------------------------------
+
+AutoReleaseStringUTF8::AutoReleaseStringUTF8( JNIEnv* _env, jstring _javaString ) {
+	env = _env;
+	javaString = _javaString;
+	chars = (javaString != NULL) ? env->GetStringUTFChars( javaString, NULL ) : NULL;
+}
+
+AutoReleaseStringUTF8::~AutoReleaseStringUTF8() {
+	if( chars != NULL )
+		env->ReleaseStringUTFChars( javaString, chars );
+}
+
+//---- JNI methods ------------------------------------------------------------
+
+extern "C"
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_isLibAvailable
+	( JNIEnv* env, jclass cls, jstring libname )
+{
+	AutoReleaseStringUTF8 clibname( env, libname );
+
+	void* lib = dlopen( clibname, RTLD_LAZY );
+	if( lib == NULL )
+		return false;
+
+	dlclose( lib );
+	return true;
+}

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

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

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

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtk/gtk.h>
+#include <jni.h>
+
+/**
+ * @author Karl Tauber
+ */
+
+//---- class AutoReleaseStringUTF8 --------------------------------------------
+
+class AutoReleaseStringUTF8 {
+	JNIEnv* env;
+	jstring javaString;
+	const char* chars;
+
+public:
+	AutoReleaseStringUTF8( JNIEnv* _env, jstring _javaString );
+	~AutoReleaseStringUTF8();
+
+	operator const gchar*() { return chars; }
+};

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

@@ -7,8 +7,36 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_TOPLEFT
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_TOPLEFT 0L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_TOP
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_TOP 1L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_TOPRIGHT
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_TOPRIGHT 2L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_RIGHT
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_RIGHT 3L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_BOTTOMRIGHT
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_BOTTOMRIGHT 4L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_BOTTOM
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_BOTTOM 5L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_BOTTOMLEFT
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_BOTTOMLEFT 6L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_LEFT
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_SIZE_LEFT 7L
 #undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_MOVE
 #define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_MOVE 8L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_folder
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_folder 1L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_multiple
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_select_multiple 2L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_show_hidden
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_show_hidden 4L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_local_only
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_local_only 8L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_do_overwrite_confirmation
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_do_overwrite_confirmation 16L
+#undef com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_create_folders
+#define com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_FC_create_folders 32L
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
  * Method:    xMoveOrResizeWindow
@@ -25,6 +53,30 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_xM
 JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_xShowWindowMenu
   (JNIEnv *, jclass, jobject, jint, jint);
 
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
+ * Method:    isLibAvailable
+ * Signature: (Ljava/lang/String;)Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_isLibAvailable
+  (JNIEnv *, jclass, jstring);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
+ * Method:    showFileChooser
+ * Signature: (Ljava/awt/Window;IZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeLinuxLibrary/FileChooserCallback;I[Ljava/lang/String;)[Ljava/lang/String;
+ */
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showFileChooser
+  (JNIEnv *, jclass, jobject, jint, jboolean, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
+ * Method:    showMessageDialog
+ * Signature: (JILjava/lang/String;Ljava/lang/String;I[Ljava/lang/String;)I
+ */
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showMessageDialog
+  (JNIEnv *, jclass, jlong, jint, jstring, jstring, jint, jobjectArray);
+
 #ifdef __cplusplus
 }
 #endif

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

@@ -43,8 +43,10 @@ var javaHome = System.getProperty( "java.home" )
 if( javaHome.endsWith( "jre" ) )
 	javaHome += "/.."
 
-interface InjectedExecOps { @get:Inject val execOps: ExecOperations }
-val injected = project.objects.newInstance<InjectedExecOps>()
+interface InjectedOps {
+	@get:Inject val fs: FileSystemOperations
+	@get:Inject val e: ExecOperations
+}
 
 tasks {
 	register( "build-natives" ) {
@@ -75,7 +77,7 @@ tasks {
 
 		compilerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf( "-x", "objective-c++", "-mmacosx-version-min=$minOs" )
+				is Gcc, is Clang -> listOf( "-x", "objective-c++", "-mmacosx-version-min=$minOs", "-fvisibility=hidden" )
 				else -> emptyList()
 			}
 		} )
@@ -96,12 +98,14 @@ tasks {
 			}
 		} )
 
+		val injectedOps = project.objects.newInstance<InjectedOps>()
+
 		doLast {
 			// sign shared library
-//			injected.execOps.exec { commandLine( "codesign", "-s", "FormDev Software GmbH", "--timestamp", "${linkedFile.asFile.get()}" ) }
+//			injectedOps.e.exec { commandLine( "codesign", "-s", "FormDev Software GmbH", "--timestamp", "${linkedFile.asFile.get()}" ) }
 
 			// copy shared library to flatlaf-core resources
-			copy {
+			injectedOps.fs.copy {
 				from( linkedFile )
 				into( nativesDir )
 				rename( linkedFile.get().asFile.name, libraryName )
@@ -110,9 +114,9 @@ tasks {
 /*dump
 			val dylib = linkedFile.asFile.get()
 			val dylibDir = dylib.parent
-			injected.execOps.exec { commandLine( "size", dylib ); standardOutput = FileOutputStream( "$dylibDir/size.txt" ) }
-			injected.execOps.exec { commandLine( "size", "-m", dylib ); standardOutput = FileOutputStream( "$dylibDir/size-m.txt" ) }
-			injected.execOps.exec {
+			injectedOps.e.exec { commandLine( "size", dylib ); standardOutput = FileOutputStream( "$dylibDir/size.txt" ) }
+			injectedOps.e.exec { commandLine( "size", "-m", dylib ); standardOutput = FileOutputStream( "$dylibDir/size-m.txt" ) }
+			injectedOps.e.exec {
 				commandLine( "objdump",
 					// commands
 					"--archive-headers",
@@ -130,8 +134,8 @@ tasks {
 					dylib )
 				standardOutput = FileOutputStream( "$dylibDir/objdump.txt" )
 			}
-			injected.execOps.exec { commandLine( "objdump", "--disassemble-all", dylib ); standardOutput = FileOutputStream( "$dylibDir/disassemble.txt" ) }
-			injected.execOps.exec { commandLine( "objdump", "--full-contents", dylib ); standardOutput = FileOutputStream( "$dylibDir/full-contents.txt" ) }
+			injectedOps.e.exec { commandLine( "objdump", "--disassemble-all", dylib ); standardOutput = FileOutputStream( "$dylibDir/disassemble.txt" ) }
+			injectedOps.e.exec { commandLine( "objdump", "--full-contents", dylib ); standardOutput = FileOutputStream( "$dylibDir/full-contents.txt" ) }
 dump*/
 		}
 	}

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

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

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

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

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

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

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

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

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

@@ -0,0 +1,406 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Cocoa/Cocoa.h>
+#import <objc/runtime.h>
+#import <jni.h>
+#import "JNIUtils.h"
+#import "JNFRunLoop.h"
+#import "com_formdev_flatlaf_ui_FlatNativeMacLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+// declare internal methods
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count );
+static jobjectArray urlsToStringArray( JNIEnv* env, NSArray* urls );
+static NSArray* getDialogURLs( NSSavePanel* dialog );
+
+//---- class FileChooserDelegate ----------------------------------------------
+
+@interface FileChooserDelegate : NSObject <NSOpenSavePanelDelegate, NSWindowDelegate> {
+		NSArray* _filters;
+
+		JavaVM* _jvm;
+		jobject _callback;
+		NSMutableSet* _urlsSet;
+	}
+
+	@property (nonatomic, assign) NSSavePanel* dialog;
+
+	- (void) initFilterAccessoryView: (NSMutableArray*)filters :(int)filterIndex
+		:(NSString*)filterFieldLabel :(bool)showSingleFilterField;
+	- (void) selectFormat: (id)sender;
+	- (void) selectFormatAtIndex: (int)index;
+@end
+
+@implementation FileChooserDelegate
+
+	- (void) initFilterAccessoryView: (NSMutableArray*)filters :(int)filterIndex
+		:(NSString*)filterFieldLabel :(bool)showSingleFilterField
+	{
+		_filters = filters;
+
+		// get filter names
+		NSArray* filterNames = filters.lastObject;
+		[filters removeLastObject];
+
+		// do not add filter/format combobox if there is only one filter
+		if( filters.count <= 1 && !showSingleFilterField ) {
+			[self selectFormatAtIndex:0];
+			return;
+		}
+
+		// create label
+		NSTextField* label = [[NSTextField alloc] initWithFrame:NSZeroRect];
+		label.stringValue = (filterFieldLabel != NULL) ? filterFieldLabel : @"Format:";
+		label.editable = NO;
+		label.bordered = NO;
+		label.bezeled = NO;
+		label.drawsBackground = NO;
+
+		// create combobox
+		NSPopUpButton* popupButton = [[NSPopUpButton alloc] initWithFrame:NSZeroRect pullsDown:NO];
+		[popupButton addItemsWithTitles:filterNames];
+		[popupButton selectItemAtIndex:MIN( MAX( filterIndex, 0 ), filterNames.count - 1 )];
+		[popupButton setTarget:self];
+		[popupButton setAction:@selector(selectFormat:)];
+
+		// create view
+		NSView* accessoryView = [[NSView alloc] initWithFrame:NSZeroRect];
+		[accessoryView addSubview:label];
+		[accessoryView addSubview:popupButton];
+
+		// autolayout
+		label.translatesAutoresizingMaskIntoConstraints = NO;
+		popupButton.translatesAutoresizingMaskIntoConstraints = NO;
+		int labelWidth = label.intrinsicContentSize.width;
+		int gap = 12;
+		int popupButtonWidth = popupButton.intrinsicContentSize.width;
+		int popupButtonMinimumWidth = 140;
+		int totalWidth = labelWidth + gap + MAX( popupButtonWidth, popupButtonMinimumWidth );
+		[accessoryView addConstraints:@[
+			// horizontal layout
+			[label.leadingAnchor constraintEqualToAnchor:accessoryView.centerXAnchor constant:-(totalWidth / 2)],
+			[popupButton.leadingAnchor constraintEqualToAnchor:label.trailingAnchor constant:gap],
+			[popupButton.widthAnchor constraintGreaterThanOrEqualToConstant:popupButtonMinimumWidth],
+
+			// vertical layout
+			[popupButton.topAnchor constraintEqualToAnchor:accessoryView.topAnchor constant:8],
+			[popupButton.bottomAnchor constraintEqualToAnchor:accessoryView.bottomAnchor constant:-8],
+			[label.firstBaselineAnchor constraintEqualToAnchor:popupButton.firstBaselineAnchor],
+		]];
+
+		[_dialog setAccessoryView:accessoryView];
+
+		// initial filter
+		[self selectFormatAtIndex:filterIndex];
+	}
+
+	- (void) selectFormat: (id)sender {
+		NSPopUpButton* popupButton = (NSPopUpButton*) sender;
+		[self selectFormatAtIndex:popupButton.indexOfSelectedItem];
+	}
+
+	- (void) selectFormatAtIndex: (int)index {
+		index = MIN( MAX( index, 0 ), _filters.count - 1 );
+		NSArray* fileTypes = [_filters objectAtIndex:index];
+
+		// use deprecated allowedFileTypes instead of newer allowedContentTypes (since macOS 11+)
+		// to support older macOS versions 10.14+ and because of some problems with allowedContentTypes:
+		// https://github.com/chromium/chromium/blob/d8e0032963b7ca4728ff4117933c0feb3e479b7a/components/remote_cocoa/app_shim/select_file_dialog_bridge.mm#L209-232
+		_dialog.allowedFileTypes = [fileTypes containsObject:@"*"] ? nil : fileTypes;
+	}
+
+	//---- NSOpenSavePanelDelegate ----
+
+	- (void) initCallback: (JavaVM*)jvm :(jobject)callback {
+		_jvm = jvm;
+		_callback = callback;
+	}
+
+	- (BOOL) panel: (id) sender validateURL:(NSURL*) url error:(NSError**) outError {
+		JNI_COCOA_TRY()
+
+		if( _callback == NULL )
+			return true;
+
+		NSArray* urls = getDialogURLs( sender );
+
+		// if multiple files are selected for opening, then the validateURL method
+		// is invoked for earch file, but our callback should be invoked only once for all files
+		if( urls != NULL && urls.count > 1 ) {
+			if( _urlsSet == NULL ) {
+				// invoked for first selected file --> invoke callback
+				_urlsSet = [NSMutableSet setWithArray:urls];
+				[_urlsSet removeObject:url];
+			} else {
+				// invoked for other selected files --> do not invoke callback
+				[_urlsSet removeObject:url];
+				if( _urlsSet.count == 0 )
+					_urlsSet = NULL;
+				return true;
+			}
+		}
+
+		JNI_THREAD_ENTER( _jvm, true )
+
+		jobjectArray files = urlsToStringArray( env, urls );
+		jlong window = (jlong) sender;
+
+		// invoke callback: boolean approve( String[] files, long hwnd );
+		jclass cls = env->GetObjectClass( _callback );
+		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+		if( approveID != NULL && !env->CallBooleanMethod( _callback, approveID, files, window ) ) {
+			_urlsSet = NULL;
+			return false; // keep dialog open
+		}
+
+		JNI_THREAD_EXIT( _jvm )
+		JNI_COCOA_CATCH()
+
+		return true;
+	}
+
+	//---- NSWindowDelegate ----
+
+	- (void) windowDidBecomeMain:(NSNotification *) notification {
+		JNI_COCOA_TRY()
+
+		// Disable main menu bar because the file dialog is modal and it should be not possible
+		// to select any menu item. Otherwiese an action could show a Swing dialog, which would
+		// be shown under the file dialog.
+		//
+		// NOTE: It is not necessary to re-enable the main menu bar because Swing does this itself.
+		//       When the file dialog is closed and a Swing window becomes active,
+		//       macOS sends windowDidBecomeMain (and windowDidBecomeKey) message to AWTWindow,
+		//       which invokes [self activateWindowMenuBar],
+		//       which invokes [CMenuBar activate:menuBar modallyDisabled:isDisabled],
+		//       which updates main menu bar.
+		NSMenu* mainMenu = [NSApp mainMenu];
+		int count = [mainMenu numberOfItems];
+		for( int i = 0; i < count; i++ ) {
+			NSMenuItem* menuItem = [mainMenu itemAtIndex:i];
+			NSMenu *subenu = [menuItem submenu];
+			if( [subenu isJavaMenu] )
+				[menuItem setEnabled:NO];
+		}
+
+		JNI_COCOA_CATCH()
+	}
+
+@end
+
+//---- helper -----------------------------------------------------------------
+
+#define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeMacLibrary_ ## option) != 0)
+#define isOptionClear( option ) ((optionsClear & com_formdev_flatlaf_ui_FlatNativeMacLibrary_ ## option) != 0)
+#define isOptionSetOrClear( option ) isOptionSet( option ) || isOptionClear( option )
+
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+	jclass stringClass = env->FindClass( "java/lang/String" );
+	return env->NewObjectArray( count, stringClass, NULL );
+}
+
+static NSMutableArray* initFilters( JNIEnv* env, jobjectArray fileTypes ) {
+	jint length = env->GetArrayLength( fileTypes );
+	if( length <= 0 )
+		return NULL;
+
+	NSMutableArray* filterNames = [NSMutableArray array];
+	NSMutableArray* filters = [NSMutableArray array];
+	NSString* filterName = NULL;
+	NSMutableArray* filter = NULL;
+	for( int i = 0; i < length; i++ ) {
+		jstring jstr = (jstring) env->GetObjectArrayElement( fileTypes, i );
+		if( jstr == NULL ) {
+			if( filter != NULL ) {
+				if( filter.count > 0 ) {
+					[filterNames addObject:filterName];
+					[filters addObject:filter];
+				}
+				filterName = NULL;
+				filter = NULL;
+			}
+			continue;
+		}
+
+		NSString* str = JavaToNSString( env, jstr );
+		env->DeleteLocalRef( jstr );
+		if( filter == NULL ) {
+			filterName = str;
+			filter = [NSMutableArray array];
+		} else
+			[filter addObject:str];
+	}
+
+	if( filters.count == 0 )
+		return NULL;
+
+	// add filter names to array (removed again after creating combobox)
+	[filters addObject:filterNames];
+
+	return filters;
+}
+
+//---- JNI methods ------------------------------------------------------------
+
+extern "C"
+JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_showFileChooser
+	( JNIEnv* env, jclass cls, jobject owner, jint dark, jboolean open,
+		jstring title, jstring prompt, jstring message, jstring filterFieldLabel,
+		jstring nameFieldLabel, jstring nameFieldStringValue, jstring directoryURL,
+		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+{
+	JNI_COCOA_ENTER()
+
+	JavaVM* jvm;
+	if( env->GetJavaVM( &jvm ) != JNI_OK )
+		return NULL;
+
+	// convert Java strings to NSString (on Java thread)
+	NSString* nsTitle = JavaToNSString( env, title );
+	NSString* nsPrompt = JavaToNSString( env, prompt );
+	NSString* nsMessage = JavaToNSString( env, message );
+	NSString* nsFilterFieldLabel = JavaToNSString( env, filterFieldLabel );
+	NSString* nsNameFieldLabel = JavaToNSString( env, nameFieldLabel );
+	NSString* nsNameFieldStringValue = JavaToNSString( env, nameFieldStringValue );
+	NSString* nsDirectoryURL = JavaToNSString( env, directoryURL );
+	NSMutableArray* filters = initFilters( env, fileTypes );
+
+	NSArray* urls = NULL;
+	NSArray** purls = &urls;
+
+	// show file dialog on macOS thread
+	[FlatJNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){
+		JNI_COCOA_TRY()
+
+		// create open/save panel
+		NSSavePanel* dialog = open ? [NSOpenPanel openPanel] : [NSSavePanel savePanel];
+
+		// set appearance
+		if( dark == 1 )
+			dialog.appearance = [NSAppearance appearanceNamed:NSAppearanceNameDarkAqua];
+		else if( dark == 0 )
+			dialog.appearance = [NSAppearance appearanceNamed:NSAppearanceNameAqua];
+
+		if( nsTitle != NULL )
+			dialog.title = nsTitle;
+		if( nsPrompt != NULL )
+			dialog.prompt = nsPrompt;
+		if( nsMessage != NULL )
+			dialog.message = nsMessage;
+		if( nsNameFieldLabel != NULL )
+			dialog.nameFieldLabel = nsNameFieldLabel;
+		if( nsNameFieldStringValue != NULL )
+			dialog.nameFieldStringValue = nsNameFieldStringValue;
+		if( nsDirectoryURL != NULL )
+			dialog.directoryURL = [NSURL fileURLWithPath:nsDirectoryURL isDirectory:YES];
+
+		// set open options
+		if( open ) {
+			NSOpenPanel* openDialog = (NSOpenPanel*) dialog;
+
+			bool canChooseFiles = isOptionSet( FC_canChooseFiles );
+			bool canChooseDirectories = isOptionSet( FC_canChooseDirectories );
+			if( !canChooseFiles && !canChooseDirectories )
+				canChooseFiles = true;
+			openDialog.canChooseFiles = canChooseFiles;
+			openDialog.canChooseDirectories = canChooseDirectories;
+
+			if( isOptionSetOrClear( FC_resolvesAliases ) )
+				openDialog.resolvesAliases = isOptionSet( FC_resolvesAliases );
+			if( isOptionSetOrClear( FC_allowsMultipleSelection ) )
+				openDialog.allowsMultipleSelection = isOptionSet( FC_allowsMultipleSelection );
+		}
+
+		// set options
+		if( isOptionSetOrClear( FC_showsTagField ) )
+			dialog.showsTagField = isOptionSet( FC_showsTagField );
+		if( isOptionSetOrClear( FC_canCreateDirectories ) )
+			dialog.canCreateDirectories = isOptionSet( FC_canCreateDirectories );
+		if( isOptionSetOrClear( FC_canSelectHiddenExtension ) )
+			dialog.canSelectHiddenExtension = isOptionSet( FC_canSelectHiddenExtension );
+		if( isOptionSetOrClear( FC_showsHiddenFiles) )
+			dialog.showsHiddenFiles = isOptionSet( FC_showsHiddenFiles);
+		if( isOptionSetOrClear( FC_extensionHidden ) )
+			dialog.extensionHidden = isOptionSet( FC_extensionHidden );
+		if( isOptionSetOrClear( FC_allowsOtherFileTypes ) )
+			dialog.allowsOtherFileTypes = isOptionSet( FC_allowsOtherFileTypes );
+		if( isOptionSetOrClear( FC_treatsFilePackagesAsDirectories ) )
+			dialog.treatsFilePackagesAsDirectories = isOptionSet( FC_treatsFilePackagesAsDirectories );
+
+		FileChooserDelegate* delegate = [FileChooserDelegate new];
+		delegate.dialog = dialog;
+
+		// initialize filter accessory view
+		if( filters != NULL ) {
+			[delegate initFilterAccessoryView:filters :fileTypeIndex :nsFilterFieldLabel :isOptionSet( FC_showSingleFilterField )];
+
+			if( open && isOptionSetOrClear( FC_accessoryViewDisclosed ) )
+				((NSOpenPanel*)dialog).accessoryViewDisclosed = isOptionSet( FC_accessoryViewDisclosed );
+		}
+
+		// initialize callback
+		if( callback != NULL )
+			[delegate initCallback :jvm :callback];
+
+		// set file dialog delegate
+		dialog.delegate = delegate;
+
+		// show dialog
+		NSModalResponse response = [dialog runModal];
+		[delegate release];
+		if( response != NSModalResponseOK ) {
+			*purls = @[];
+			return;
+		}
+
+		*purls = getDialogURLs( dialog );
+
+		JNI_COCOA_CATCH()
+	}];
+
+	if( urls == NULL )
+		return NULL;
+
+	// convert URLs to Java string array
+	return urlsToStringArray( env, urls );
+
+	JNI_COCOA_EXIT()
+}
+
+static NSArray* getDialogURLs( NSSavePanel* dialog ) {
+	if( [dialog isKindOfClass:[NSOpenPanel class]] )
+		return [[NSArray alloc] initWithArray: static_cast<NSOpenPanel*>(dialog).URLs];
+
+	NSURL* url = dialog.URL;
+	// use '[[NSArray alloc] initWithObject:url]' here because '@[url]' crashes on macOS 10.14
+	return (url != NULL) ? [[NSArray alloc] initWithObject:url] : @[];
+}
+
+static jobjectArray urlsToStringArray( JNIEnv* env, NSArray* urls ) {
+	jsize count = (urls != NULL) ? urls.count : 0;
+	jobjectArray array = newJavaStringArray( env, count );
+	for( int i = 0; i < count; i++ ) {
+		jstring filename = NormalizedPathJavaFromNSString( env, [urls[i] path] );
+		env->SetObjectArrayElement( array, i, filename );
+		env->DeleteLocalRef( filename );
+	}
+	return array;
+}

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

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Cocoa/Cocoa.h>
+#import <objc/runtime.h>
+#import <jni.h>
+#import "JNIUtils.h"
+#import "JNFRunLoop.h"
+#import "com_formdev_flatlaf_ui_FlatNativeMacLibrary.h"
+
+/**
+ * @author Karl Tauber
+ * @since 3.7
+ */
+
+extern "C"
+JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_showMessageDialog
+	( JNIEnv* env, jclass cls, jlong hwndParent, jint alertStyle, jstring messageText, jstring informativeText,
+		jint defaultButton, jobjectArray buttons )
+{
+	JNI_COCOA_ENTER()
+
+	// convert Java strings to NSString (on Java thread)
+	NSString* nsMessageText = JavaToNSString( env, messageText );
+	NSString* nsInformativeText = JavaToNSString( env, informativeText );
+
+	jint buttonCount = env->GetArrayLength( buttons );
+	NSMutableArray* nsButtons = [NSMutableArray array];
+	for( int i = 0; i < buttonCount; i++ ) {
+		NSString* nsButton = JavaToNSString( env, (jstring) env->GetObjectArrayElement( buttons, i ) );
+		[nsButtons addObject:nsButton];
+	}
+
+	jint result = -1;
+	jint* presult = &result;
+
+	// show alert on macOS thread
+	[FlatJNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){
+		NSAlert* alert = [[NSAlert alloc] init];
+
+		// use appearance from parent window
+		NSWindow* parent = (NSWindow*) hwndParent;
+		if( parent != NULL )
+			alert.window.appearance = parent.appearance;
+
+		// use empty string because if alert.messageText is not set it displays "Alert"
+		alert.messageText = (nsMessageText != NULL) ? nsMessageText : @"";
+		if( nsInformativeText != NULL )
+			alert.informativeText = nsInformativeText;
+
+		// alert style
+		switch( alertStyle ) {
+			case /* JOptionPane.ERROR_MESSAGE */       0: alert.alertStyle = NSAlertStyleCritical; break;
+			default:
+			case /* JOptionPane.INFORMATION_MESSAGE */ 1: alert.alertStyle = NSAlertStyleInformational; break;
+			case /* JOptionPane.WARNING_MESSAGE */     2: alert.alertStyle = NSAlertStyleWarning; break;
+		}
+
+		// add buttons
+		for( int i = 0; i < nsButtons.count; i++ ) {
+			NSButton* b = [alert addButtonWithTitle:nsButtons[i]];
+			if( i == defaultButton )
+				alert.window.defaultButtonCell = b.cell;
+		}
+
+		// show alert
+		NSInteger response = [alert runModal];
+
+		// if no buttons added, which shows a single OK button, the response is 0 when clicking OK
+		// if buttons added, response is 1000+buttonIndex
+		*presult = MAX( response - NSAlertFirstButtonReturn, 0 );
+	}];
+
+	return result;
+
+	JNI_COCOA_EXIT()
+}