release 0.36

- do not increase inspection level when activated with keyboard shortcut
- added some javadoc
- added to CHANGELOG.md and flatlaf-extras/README.md

.travis.yml

@@ -5,7 +5,7 @@ jdk:
   - openjdk8
   - openjdk9
   - openjdk11
-  - openjdk13
+  - openjdk14
 
 before_cache:
   - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock

CHANGELOG.md

@@ -1,6 +1,68 @@
 FlatLaf Change Log
 ==================
 
+## 0.36
+
+- ScrollBar: Made styling more flexible by supporting insets and arc for track
+  and thumb. (issue #103)
+- ComboBox: Minimum width is now 72 pixels (was ~50 for non-editable and ~130
+  for editable comboboxes).
+- ComboBox: Support custom borders in combobox editors. (issue #102)
+- Button: Support non-square icon-only buttons. (issue #110)
+- Ubuntu Linux: Fixed poorly rendered font. (issue #105)
+- macOS Catalina: Use Helvetica Neue font.
+- `FlatInspector` added (see [FlatLaf Extras](flatlaf-extras)).
+
+
+## 0.35
+
+- Added drop shadows to popup menus, combobox popups, tooltips and internal
+  frames. (issue #94)
+- Support different component border colors to indicate errors, warnings or
+  custom state (set client property `JComponent.outline` to `error`, `warning`
+  or any `java.awt.Color`).
+- Button and ToggleButton: Support round button style (set client property
+  `JButton.buttonType` to `roundRect`).
+- ComboBox, Spinner and TextField: Support round border style (set client
+  property `JComponent.roundRect` to `true`).
+- Paint nicely rounded buttons, comboboxes, spinners and text fields when
+  setting `Button.arc`, `Component.arc` or `TextComponent.arc` to a large value
+  (e.g. 1000).
+- Added Java 9 module descriptor to `flatlaf-extras-<version>.jar` and
+  `flatlaf-swingx-<version>.jar`.
+- CheckBox and RadioButton: Flag `opaque` is no longer ignored when checkbox or
+  radio button is used as table cell renderer. (issue #77)
+- FileChooser: Use system icons. (issue #100)
+- FileChooser: Fixed missing labels in file chooser when running on Java 9 or
+  later. (issue #98)
+- PasswordField: Do not apply minimum width if `columns` property is greater
+  than zero.
+
+
+## 0.34
+
+- Menus: New menu item renderer brings stable left margins, right aligned
+  accelerators and larger gap between text and accelerator. This makes menus
+  look more modern and more similar to native platform menus.
+- New underline menu selection style that displays selected menu items similar
+  to tabs (to enable use `UIManager.put( "MenuItem.selectionType", "underline"
+  );`).
+- Menus: Fixed text color of selected menu items that use HTML. (issue #87)
+- Menus: On Windows, pressing <kbd>F10</kbd> now activates the menu bar without
+  showing a menu popup (as usual on Windows platform). On other platforms the
+  first menu popup is shown.
+- Menus: On Windows, releasing <kbd>Alt</kbd> key now activates the menu bar (as
+  usual on Windows platform). (issue #43)
+- Menus: Fixed inconsistent left padding in menu items. (issue #3)
+- Menus: Fixed: Setting `iconTextGap` property on a menu item did increase left
+  and right margins. (issue #54)
+- Hide mnemonics if window is deactivated (e.g. <kbd>Alt+Tab</kbd> to another
+  window). (issue #43)
+- macOS: Enabled drop shadows for popup menus and combobox popups. (issue #94)
+- macOS: Fixed NPE if using `JMenuBar` in `JInternalFrame` and macOS screen menu
+  bar is enabled (with `-Dapple.laf.useScreenMenuBar=true`). (issue #90)
+
+
 ## 0.33
 
 - Improved creation of disabled grayscale icons used in disabled buttons, labels

README.md

@@ -69,9 +69,10 @@ docs).
 Addons
 ------
 
+- [IntelliJ Themes Pack](flatlaf-intellij-themes)
+- [Extras](flatlaf-extras)
 - [SwingX](flatlaf-swingx)
 - [JIDE Common Layer](flatlaf-jide-oss)
-- [IntelliJ Themes Pack](flatlaf-intellij-themes)
 
 
 Projects using FlatLaf

build.gradle.kts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-val releaseVersion = "0.33"
-val developmentVersion = "0.34-SNAPSHOT"
+val releaseVersion = "0.36"
+val developmentVersion = "0.37-SNAPSHOT"
 
 version = if( java.lang.Boolean.getBoolean( "release" ) ) releaseVersion else developmentVersion
 

buildSrc/build.gradle.kts

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+plugins {
+	`kotlin-dsl`
+}
+
+// required for kotlin-dsl or embedded-kotlin plugins
+repositories {
+	jcenter()
+}
+
+dependencies {
+	// NOTE: keep plugin versions in sync with settings.gradle.kts
+
+	// "com.jfrog.bintray" plugin
+	implementation( "com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4" )
+
+	// "com.jfrog.artifactory" plugin
+	implementation( "org.jfrog.buildinfo:build-info-extractor-gradle:4.13.0" )
+}

buildSrc/src/main/java/ReorderJarEntries.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2020 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 java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
+import java.util.function.Predicate;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+import java.util.zip.ZipOutputStream;
+
+/**
+ * Reorders entries in a JAR file so that .properties files are placed before .class files,
+ * which is necessary to workaround an issue in NetBeans 11.3 (and older).
+ * See issues #13 and #93.
+ *
+ * @author Karl Tauber
+ */
+public class ReorderJarEntries
+{
+	public static void reorderJarEntries( File jarFile )
+		throws IOException
+	{
+		ByteArrayOutputStream outStream = new ByteArrayOutputStream( (int) jarFile.length() + 1000 );
+
+		try( ZipOutputStream zipOutStream = new ZipOutputStream( outStream ) ) {
+			// 1st pass: copy .properties files
+			copyFiles( zipOutStream, jarFile, name -> name.endsWith( ".properties" ) );
+
+			// 2st pass: copy other files
+			copyFiles( zipOutStream, jarFile, name -> !name.endsWith( ".properties" ) );
+		}
+
+		// replace JAR
+		Files.write( jarFile.toPath(), outStream.toByteArray(),
+			StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING );
+	}
+
+	private static void copyFiles( ZipOutputStream dest, File jarFile, Predicate<String> filter )
+		throws IOException
+	{
+		try( ZipInputStream zipInputStream = new ZipInputStream( new FileInputStream( jarFile ) ) ) {
+			ZipEntry entry;
+			while( (entry = zipInputStream.getNextEntry()) != null ) {
+				if( filter.test( entry.getName() ) ) {
+					dest.putNextEntry( entry );
+					copyFile( zipInputStream, dest );
+				}
+			}
+		}
+	}
+
+	private static void copyFile( InputStream src, OutputStream dest )
+		throws IOException
+	{
+		byte[] buf = new byte[8*1024];
+		int len;
+		while( (len = src.read( buf )) > 0 )
+			dest.write( buf, 0, len );
+		dest.flush();
+	}
+}

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

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+plugins {
+	java
+}
+
+if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
+	sourceSets {
+		create( "java9" ) {
+			java {
+				setSrcDirs( listOf( "src/main/java9" ) )
+			}
+		}
+	}
+
+	tasks {
+		named<JavaCompile>( "compileJava9Java" ) {
+			sourceCompatibility = "9"
+			targetCompatibility = "9"
+		}
+
+		jar {
+			manifest.attributes( "Multi-Release" to "true" )
+
+			into( "META-INF/versions/9" ) {
+				from( sourceSets["java9"].output )
+			}
+		}
+	}
+}

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

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2020 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.
+ */
+
+open class ModuleInfoExtension {
+	var paths: ArrayList<String> = ArrayList()
+
+	fun dependsOn( vararg paths: String ) {
+		this.paths.addAll( paths )
+	}
+}
+
+val extension = project.extensions.create<ModuleInfoExtension>( "flatlafModuleInfo" )
+
+
+plugins {
+	java
+}
+
+if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
+	sourceSets {
+		create( "module-info" ) {
+			java {
+				// include "src/main/java" here to get compile errors if classes are
+				// used from other modules that are not specified in module dependencies
+				setSrcDirs( listOf( "src/main/module-info", "src/main/java" ) )
+			}
+		}
+	}
+
+	tasks {
+		named<JavaCompile>( "compileModuleInfoJava" ) {
+			sourceCompatibility = "9"
+			targetCompatibility = "9"
+
+			dependsOn( extension.paths )
+
+			options.compilerArgs.add( "--module-path" )
+			options.compilerArgs.add( configurations.runtimeClasspath.get().asPath )
+		}
+
+		jar {
+			manifest.attributes( "Multi-Release" to "true" )
+
+			into( "META-INF/versions/9" ) {
+				from( sourceSets["module-info"].output ) {
+					include( "module-info.class" )
+				}
+			}
+		}
+	}
+}

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

@@ -0,0 +1,116 @@
+/*
+ * Copyright 2020 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.
+ */
+
+
+open class PublishExtension {
+	var artifactId: String? = null
+	var name: String? = null
+	var description: String? = null
+}
+
+val extension = project.extensions.create<PublishExtension>( "flatlafPublish" )
+
+
+plugins {
+	`maven-publish`
+	id( "com.jfrog.bintray" )
+	id( "com.jfrog.artifactory" )
+}
+
+publishing {
+	publications {
+		create<MavenPublication>( "maven" ) {
+			afterEvaluate {
+				artifactId = extension.artifactId
+			}
+			groupId = "com.formdev"
+
+			from( components["java"] )
+
+			pom {
+				afterEvaluate {
+					this@pom.name.set( extension.name )
+					this@pom.description.set( extension.description )
+				}
+				url.set( "https://github.com/JFormDesigner/FlatLaf" )
+
+				licenses {
+					license {
+						name.set( "The Apache License, Version 2.0" )
+						url.set( "https://www.apache.org/licenses/LICENSE-2.0.txt" )
+					}
+				}
+
+				developers {
+					developer {
+						name.set( "Karl Tauber" )
+						organization.set( "FormDev Software GmbH" )
+						organizationUrl.set( "https://www.formdev.com/" )
+					}
+				}
+
+				scm {
+					url.set( "https://github.com/JFormDesigner/FlatLaf" )
+				}
+			}
+		}
+	}
+}
+
+bintray {
+	user = rootProject.extra["bintray.user"] as String?
+	key = rootProject.extra["bintray.key"] as String?
+
+	setPublications( "maven" )
+
+	with( pkg ) {
+		repo = "flatlaf"
+		afterEvaluate {
+			this@with.name = extension.artifactId
+		}
+		setLicenses( "Apache-2.0" )
+		vcsUrl = "https://github.com/JFormDesigner/FlatLaf"
+
+		with( version ) {
+			name = project.version.toString()
+		}
+
+		publish = rootProject.extra["bintray.publish"] as Boolean
+		dryRun = rootProject.extra["bintray.dryRun"] as Boolean
+	}
+}
+
+artifactory {
+	setContextUrl( "https://oss.jfrog.org" )
+
+	publish( closureOf<org.jfrog.gradle.plugin.artifactory.dsl.PublisherConfig> {
+		repository( delegateClosureOf<groovy.lang.GroovyObject> {
+			setProperty( "repoKey", "oss-snapshot-local" )
+			setProperty( "username", rootProject.extra["bintray.user"] as String? )
+			setProperty( "password", rootProject.extra["bintray.key"] as String? )
+		} )
+
+		defaults( delegateClosureOf<groovy.lang.GroovyObject> {
+			invokeMethod( "publications", "maven" )
+			setProperty( "publishArtifacts", true )
+			setProperty( "publishPom", true )
+		} )
+	} )
+
+	resolve( delegateClosureOf<org.jfrog.gradle.plugin.artifactory.dsl.ResolverConfig> {
+		setProperty( "repoKey", "jcenter" )
+	} )
+}

flatlaf-core/build.gradle.kts

@@ -16,161 +16,46 @@
 
 plugins {
 	`java-library`
-	`maven-publish`
-	id( "com.jfrog.bintray" )
-	id( "com.jfrog.artifactory" )
+	`flatlaf-module-info`
+	`flatlaf-java9`
+	`flatlaf-publish`
 }
 
-if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
-	sourceSets {
-		create( "java9" ) {
-			java {
-				setSrcDirs( listOf( "src/main/java9" ) )
-			}
-		}
-		create( "module-info" ) {
-			java {
-				// include "src/main/java" here to get compile errors if classes are
-				// used from other modules that are not specified in module dependencies
-				setSrcDirs( listOf( "src/main/module-info", "src/main/java" ) )
-			}
-		}
-	}
+java {
+	withSourcesJar()
+	withJavadocJar()
 }
 
 tasks {
-	assemble {
-		dependsOn(
-			"sourcesJar",
-			"javadocJar"
-		)
-	}
-
-	if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
-		named<JavaCompile>( "compileModuleInfoJava" ) {
-			sourceCompatibility = "9"
-			targetCompatibility = "9"
-		}
-	}
-
 	jar {
 		archiveBaseName.set( "flatlaf" )
 
-		if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
-			manifest.attributes( "Multi-Release" to "true" )
-
-			into( "META-INF/versions/9" ) {
-				from( sourceSets["java9"].output )
-			}
-
-			from( sourceSets["module-info"].output ) {
-				include( "module-info.class" )
-			}
+		doLast {
+			ReorderJarEntries.reorderJarEntries( outputs.files.singleFile );
 		}
 	}
 
 	javadoc {
 		options {
 			this as StandardJavadocDocletOptions
+			use( true )
 			tags = listOf( "uiDefault", "clientProperty" )
 			addStringOption( "Xdoclint:all,-missing", "-Xdoclint:all,-missing" )
 		}
 		isFailOnError = false
 	}
 
-	register( "sourcesJar", Jar::class ) {
+	named<Jar>("sourcesJar" ) {
 		archiveBaseName.set( "flatlaf" )
-		archiveClassifier.set( "sources" )
-
-		from( sourceSets.main.get().allJava )
 	}
 
-	register( "javadocJar", Jar::class ) {
+	named<Jar>("javadocJar" ) {
 		archiveBaseName.set( "flatlaf" )
-		archiveClassifier.set( "javadoc" )
-
-		from( javadoc )
 	}
 }
 
-publishing {
-	publications {
-		create<MavenPublication>( "maven" ) {
-			artifactId = "flatlaf"
-			groupId = "com.formdev"
-
-			from( components["java"] )
-
-			artifact( tasks["sourcesJar"] )
-			artifact( tasks["javadocJar"] )
-
-			pom {
-				name.set( "FlatLaf" )
-				description.set( "Flat Look and Feel" )
-				url.set( "https://github.com/JFormDesigner/FlatLaf" )
-
-				licenses {
-					license {
-						name.set( "The Apache License, Version 2.0" )
-						url.set( "https://www.apache.org/licenses/LICENSE-2.0.txt" )
-					}
-				}
-
-				developers {
-					developer {
-						name.set( "Karl Tauber" )
-						organization.set( "FormDev Software GmbH" )
-						organizationUrl.set( "https://www.formdev.com/" )
-					}
-				}
-
-				scm {
-					url.set( "https://github.com/JFormDesigner/FlatLaf" )
-				}
-			}
-		}
-	}
-}
-
-bintray {
-	user = rootProject.extra["bintray.user"] as String?
-	key = rootProject.extra["bintray.key"] as String?
-
-	setPublications( "maven" )
-
-	with( pkg ) {
-		repo = "flatlaf"
-		name = "flatlaf"
-		setLicenses( "Apache-2.0" )
-		vcsUrl = "https://github.com/JFormDesigner/FlatLaf"
-
-		with( version ) {
-			name = project.version.toString()
-		}
-
-		publish = rootProject.extra["bintray.publish"] as Boolean
-		dryRun = rootProject.extra["bintray.dryRun"] as Boolean
-	}
-}
-
-artifactory {
-	setContextUrl( "https://oss.jfrog.org" )
-
-	publish( closureOf<org.jfrog.gradle.plugin.artifactory.dsl.PublisherConfig> {
-		repository( delegateClosureOf<groovy.lang.GroovyObject> {
-			setProperty( "repoKey", "oss-snapshot-local" )
-			setProperty( "username", rootProject.extra["bintray.user"] as String? )
-			setProperty( "password", rootProject.extra["bintray.key"] as String? )
-		} )
-
-		defaults( delegateClosureOf<groovy.lang.GroovyObject> {
-			invokeMethod( "publications", "maven" )
-			setProperty( "publishArtifacts", true )
-			setProperty( "publishPom", true )
-		} )
-	} )
-
-	resolve( delegateClosureOf<org.jfrog.gradle.plugin.artifactory.dsl.ResolverConfig> {
-		setProperty( "repoKey", "jcenter" )
-	} )
+flatlafPublish {
+	artifactId = "flatlaf"
+	name = "FlatLaf"
+	description = "Flat Look and Feel"
 }

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

@@ -30,7 +30,8 @@ public interface FlatClientProperties
 	 * <p>
 	 * <strong>Components</strong> {@link javax.swing.JButton} and {@link javax.swing.JToggleButton}<br>
 	 * <strong>Value type</strong> {@link java.lang.String}<br>
-	 * <strong>Allowed Values</strong> {@link #BUTTON_TYPE_SQUARE} and {@link #BUTTON_TYPE_HELP}
+	 * <strong>Allowed Values</strong> {@link #BUTTON_TYPE_SQUARE}, {@link #BUTTON_TYPE_ROUND_RECT},
+	 * {@link #BUTTON_TYPE_TAB}, {@link #BUTTON_TYPE_HELP} and {@link BUTTON_TYPE_TOOLBAR_BUTTON}
 	 */
 	String BUTTON_TYPE = "JButton.buttonType";
 
@@ -43,6 +44,15 @@ public interface FlatClientProperties
 	 */
 	String BUTTON_TYPE_SQUARE = "square";
 
+	/**
+	 * Paint the button with round edges.
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.JButton} and {@link javax.swing.JToggleButton}
+	 *
+	 * @see #BUTTON_TYPE
+	 */
+	String BUTTON_TYPE_ROUND_RECT = "roundRect";
+
 	/**
 	 * Paint the toggle button in tab style.
 	 * <p>
@@ -61,6 +71,15 @@ public interface FlatClientProperties
 	 */
 	String BUTTON_TYPE_HELP = "help";
 
+	/**
+	 * Paint the button in toolbar style.
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.JButton} and {@link javax.swing.JToggleButton}
+	 *
+	 * @see #BUTTON_TYPE
+	 */
+	String BUTTON_TYPE_TOOLBAR_BUTTON = "toolBarButton";
+
 	/**
 	 * Specifies selected state of a checkbox.
 	 * <p>
@@ -80,7 +99,8 @@ public interface FlatClientProperties
 	/**
 	 * Specifies minimum width of a component.
 	 * <p>
-	 * <strong>Component</strong> {@link javax.swing.JButton}, {@link javax.swing.JToggleButton} and {@link javax.swing.text.JTextComponent}<br>
+	 * <strong>Component</strong> {@link javax.swing.JButton}, {@link javax.swing.JToggleButton},
+	 * {@link javax.swing.JComboBox}, {@link javax.swing.JSpinner} and {@link javax.swing.text.JTextComponent}<br>
 	 * <strong>Value type</strong> {@link java.lang.Integer}<br>
 	 */
 	String MINIMUM_WIDTH = "JComponent.minimumWidth";
@@ -93,6 +113,52 @@ public interface FlatClientProperties
 	 */
 	String MINIMUM_HEIGHT = "JComponent.minimumHeight";
 
+	/**
+	 * Specifies the outline color of the component border.
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.JButton}, {@link javax.swing.JComboBox},
+	 * {@link javax.swing.JFormattedTextField}, {@link javax.swing.JPasswordField},
+	 * {@link javax.swing.JScrollPane}, {@link javax.swing.JSpinner},
+	 * {@link javax.swing.JTextField} and {@link javax.swing.JToggleButton}<br>
+	 * <strong>Value type</strong> {@link java.lang.String} or {@link java.awt.Color} or {@link java.awt.Color}[2]<br>
+	 * <strong>Allowed Values</strong> {@link #OUTLINE_ERROR}, {@link #OUTLINE_WARNING},
+	 * any color (type {@link java.awt.Color}) or an array of two colors (type {@link java.awt.Color}[2])
+	 * where the first color is for focused state and the second for unfocused state
+	 */
+	String OUTLINE = "JComponent.outline";
+
+	/**
+	 * Paint the component border in another color (usually reddish) to indicate an error.
+	 *
+	 * @see #OUTLINE
+	 */
+	String OUTLINE_ERROR = "error";
+
+	/**
+	 * Paint the component border in another color (usually yellowish) to indicate a warning.
+	 *
+	 * @see #OUTLINE
+	 */
+	String OUTLINE_WARNING = "warning";
+
+	/**
+	 * Paint the component with round edges.
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.JComboBox}, {@link javax.swing.JSpinner},
+	 * {@link javax.swing.JTextField}, {@link javax.swing.JFormattedTextField} and {@link javax.swing.JPasswordField}
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 */
+	String COMPONENT_ROUND_RECT = "JComponent.roundRect";
+
+	/**
+	 * Specifies whether a drop shadow is painted if the component is shown in a popup
+	 * or if the component is the owner of another component that is shown in a popup.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 */
+	String POPUP_DROP_SHADOW_PAINTED = "Popup.dropShadowPainted";
+
 	/**
 	 * Specifies whether the progress bar has always the larger height even if no string is painted.
 	 * <p>
@@ -240,4 +306,14 @@ public interface FlatClientProperties
 		Object value = c.getClientProperty( key );
 		return (value instanceof Color) ? (Color) value : defaultValue;
 	}
+
+	static int clientPropertyChoice( JComponent c, String key, String... choices ) {
+		Object value = c.getClientProperty( key );
+		for( int i = 0; i < choices.length; i++ ) {
+			if( choices[i].equals( value ) )
+				return i;
+
+		}
+		return -1;
+	}
 }

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

@@ -32,11 +32,11 @@ public class FlatDarculaLaf
 
 	@Override
 	public String getName() {
-		return "Flat Darcula";
+		return "FlatLaf Darcula";
 	}
 
 	@Override
 	public String getDescription() {
-		return "Flat Darcula Look and Feel";
+		return "FlatLaf Darcula Look and Feel";
 	}
 }

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

@@ -32,12 +32,12 @@ public class FlatDarkLaf
 
 	@Override
 	public String getName() {
-		return "Flat Dark";
+		return "FlatLaf Dark";
 	}
 
 	@Override
 	public String getDescription() {
-		return "Flat Dark Look and Feel";
+		return "FlatLaf Dark Look and Feel";
 	}
 
 	@Override

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

@@ -0,0 +1,89 @@
+/*
+ * Copyright 2020 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;
+
+/**
+ * Default color palette for action icons and object icons.
+ * <p>
+ * The idea is to use only this well defined set of colors in SVG icons and
+ * then they are replaced at runtime to dark variants or to other theme colors.
+ * Then a single SVG icon (light variant) can be used for dark themes too.
+ * IntelliJ Platform uses this mechanism to allow themes to change IntelliJ Platform icons.
+ * <p>
+ * Use the {@code *_DARK} colors only in {@code *_dark.svg} files.
+ * <p>
+ * The colors are based on IntelliJ Platform
+ *   <a href="https://jetbrains.design/intellij/principles/icons/#action-icons">Action icons</a>
+ * and
+ *   <a href="https://jetbrains.design/intellij/principles/icons/#noun-icons">Noun icons</a>
+ * <p>
+ * These colors may be changed by IntelliJ Platform themes.
+ * <p>
+ * You may use these colors also in your application (outside of SVG icons), but do
+ * not use the RGB values defined in this enum.<br>
+ * Instead use {@code UIManager.getColor( FlatIconColors.ACTIONS_GREY.key )}.
+ *
+ * @author Karl Tauber
+ */
+public enum FlatIconColors
+{
+	// colors for action icons
+	// see https://jetbrains.design/intellij/principles/icons/#action-icons
+	ACTIONS_RED				( 0xDB5860, "Actions.Red", true, false ),
+	ACTIONS_RED_DARK		( 0xC75450, "Actions.Red", false, true ),
+	ACTIONS_YELLOW			( 0xEDA200, "Actions.Yellow", true, false ),
+	ACTIONS_YELLOW_DARK		( 0xF0A732, "Actions.Yellow", false, true ),
+	ACTIONS_GREEN			( 0x59A869, "Actions.Green", true, false ),
+	ACTIONS_GREEN_DARK		( 0x499C54, "Actions.Green", false, true ),
+	ACTIONS_BLUE			( 0x389FD6, "Actions.Blue", true, false ),
+	ACTIONS_BLUE_DARK		( 0x3592C4, "Actions.Blue", false, true ),
+	ACTIONS_GREY			( 0x6E6E6E, "Actions.Grey", true, false ),
+	ACTIONS_GREY_DARK		( 0xAFB1B3, "Actions.Grey", false, true ),
+	ACTIONS_GREYINLINE		( 0x7F8B91, "Actions.GreyInline", true, false ),
+	ACTIONS_GREYINLINE_DARK	( 0x7F8B91, "Actions.GreyInline", false, true ),
+
+	// colors for object icons
+	// see https://jetbrains.design/intellij/principles/icons/#noun-icons
+	OBJECTS_GREY			( 0x9AA7B0, "Objects.Grey" ),
+	OBJECTS_BLUE			( 0x40B6E0, "Objects.Blue" ),
+	OBJECTS_GREEN			( 0x62B543, "Objects.Green" ),
+	OBJECTS_YELLOW			( 0xF4AF3D, "Objects.Yellow" ),
+	OBJECTS_YELLOW_DARK		( 0xD9A343, "Objects.YellowDark" ),
+	OBJECTS_PURPLE			( 0xB99BF8, "Objects.Purple" ),
+	OBJECTS_PINK			( 0xF98B9E, "Objects.Pink" ),
+	OBJECTS_RED				( 0xF26522, "Objects.Red" ),
+	OBJECTS_RED_STATUS		( 0xE05555, "Objects.RedStatus" ),
+	OBJECTS_GREEN_ANDROID	( 0xA4C639, "Objects.GreenAndroid" ),
+	OBJECTS_BLACK_TEXT		( 0x231F20, "Objects.BlackText" );
+
+	public final int rgb;
+	public final String key;
+
+	public final boolean light;
+	public final boolean dark;
+
+	FlatIconColors( int rgb, String key ) {
+		this( rgb, key, true, true );
+	}
+
+	FlatIconColors( int rgb, String key, boolean light, boolean dark ) {
+		this.rgb = rgb;
+		this.key = key;
+		this.light = light;
+		this.dark = dark;
+	}
+}

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

@@ -85,8 +85,12 @@ class FlatInputMaps
 			// swap to make it consistent with List and Tree
 			"HOME", "selectFirstRow",
 			"END", "selectLastRow",
+			"shift HOME", "selectFirstRowExtendSelection",
+			"shift END", "selectLastRowExtendSelection",
 			mac( "ctrl HOME", null ), "selectFirstColumn",
-			mac( "ctrl END", null ), "selectLastColumn"
+			mac( "ctrl END", null ), "selectLastColumn",
+			mac( "shift ctrl HOME", null ), "selectFirstColumnExtendSelection",
+			mac( "shift ctrl END", null ), "selectLastColumnExtendSelection"
 		);
 
 		if( !SystemInfo.IS_MAC ) {
@@ -501,6 +505,9 @@ class FlatInputMaps
 			"alt KP_LEFT", "selectParent",
 			"alt KP_RIGHT", "selectChild",
 
+			"shift HOME", "selectFirstExtendSelection",
+			"shift END", "selectLastExtendSelection",
+
 		    "meta A", "selectAll",
 		    "meta C", "copy",
 		    "meta V", "paste",
@@ -545,8 +552,6 @@ class FlatInputMaps
 			"shift ctrl SPACE", null,
 			"shift ctrl UP", null,
 			"shift DELETE", null,
-			"shift END", null,
-			"shift HOME", null,
 			"shift INSERT", null,
 			"shift PAGE_DOWN", null,
 			"shift PAGE_UP", null,

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

@@ -32,11 +32,11 @@ public class FlatIntelliJLaf
 
 	@Override
 	public String getName() {
-		return "Flat IntelliJ";
+		return "FlatLaf IntelliJ";
 	}
 
 	@Override
 	public String getDescription() {
-		return "Flat IntelliJ Look and Feel";
+		return "FlatLaf IntelliJ Look and Feel";
 	}
 }

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

@@ -18,22 +18,17 @@ package com.formdev.flatlaf;
 
 import java.awt.Color;
 import java.awt.Component;
-import java.awt.Container;
 import java.awt.EventQueue;
 import java.awt.Font;
 import java.awt.Image;
-import java.awt.KeyEventPostProcessor;
-import java.awt.KeyboardFocusManager;
 import java.awt.RenderingHints;
 import java.awt.Toolkit;
 import java.awt.Window;
-import java.awt.event.KeyEvent;
 import java.awt.image.FilteredImageSource;
 import java.awt.image.ImageFilter;
 import java.awt.image.ImageProducer;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
-import java.lang.ref.WeakReference;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
@@ -44,13 +39,10 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.logging.Level;
 import java.util.logging.Logger;
-import javax.swing.AbstractButton;
+import javax.swing.BorderFactory;
 import javax.swing.Icon;
 import javax.swing.ImageIcon;
 import javax.swing.JComponent;
-import javax.swing.JLabel;
-import javax.swing.JRootPane;
-import javax.swing.JTabbedPane;
 import javax.swing.LookAndFeel;
 import javax.swing.PopupFactory;
 import javax.swing.SwingUtilities;
@@ -64,6 +56,7 @@ import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicLookAndFeel;
 import javax.swing.text.StyleContext;
 import javax.swing.text.html.HTMLEditorKit;
+import com.formdev.flatlaf.ui.FlatPopupFactory;
 import com.formdev.flatlaf.util.GrayFilter;
 import com.formdev.flatlaf.util.MultiResolutionImageSupport;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -81,14 +74,14 @@ public abstract class FlatLaf
 	private static final String DESKTOPFONTHINTS = "awt.font.desktophints";
 
 	private String desktopPropertyName;
+	private String desktopPropertyName2;
 	private PropertyChangeListener desktopPropertyListener;
 
 	private static boolean aquaLoaded;
 	private static boolean updateUIPending;
 
-	private KeyEventPostProcessor mnemonicListener;
-	private static boolean showMnemonics;
-	private static WeakReference<Window> lastShowMnemonicWindow;
+	private PopupFactory oldPopupFactory;
+	private MnemonicHandler mnemonicHandler;
 
 	private Consumer<UIDefaults> postInitialization;
 
@@ -131,14 +124,10 @@ public abstract class FlatLaf
 	public Icon getDisabledIcon( JComponent component, Icon icon ) {
 		if( icon instanceof ImageIcon ) {
 			Object grayFilter = UIManager.get( "Component.grayFilter" );
-			if( !(grayFilter instanceof ImageFilter) ) {
-				// fallback
-				grayFilter = isDark()
-					? new GrayFilter( -20, -70, 100 )
-					: new GrayFilter(  25, -25, 100 );
-			}
+			ImageFilter filter = (grayFilter instanceof ImageFilter)
+				? (ImageFilter) grayFilter
+				: GrayFilter.createDisabledIconFilter( isDark() ); // fallback
 
-			ImageFilter filter = (ImageFilter) grayFilter;
 			Function<Image, Image> mapper = img -> {
 				ImageProducer producer = new FilteredImageSource( img.getSource(), filter );
 				return Toolkit.getDefaultToolkit().createImage( producer );
@@ -158,12 +147,13 @@ public abstract class FlatLaf
 
 		super.initialize();
 
-		// add mnemonic listener
-		mnemonicListener = e -> {
-			checkShowMnemonics( e );
-			return false;
-		};
-		KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventPostProcessor( mnemonicListener );
+		// install popup factory
+		oldPopupFactory = PopupFactory.getSharedInstance();
+		PopupFactory.setSharedInstance( new FlatPopupFactory() );
+
+		// install mnemonic handler
+		mnemonicHandler = new MnemonicHandler();
+		mnemonicHandler.install();
 
 		// listen to desktop property changes to update UI if system font or scaling changes
 		if( SystemInfo.IS_WINDOWS ) {
@@ -171,15 +161,19 @@ public abstract class FlatLaf
 			//   Settings > Ease of Access > Display > Make text bigger (100% - 225%)
 			desktopPropertyName = "win.messagebox.font";
 		} else if( SystemInfo.IS_LINUX ) {
+			// Linux/Gnome allows changing font in "Tweaks" app
+			desktopPropertyName = "gnome.Gtk/FontName";
+
 			// Linux/Gnome allows extra scaling and larger text:
 			//   Settings > Devices > Displays > Scale (100% or 200%)
 			//   Settings > Universal access > Large Text (off or on, 125%)
-			desktopPropertyName = "gnome.Xft/DPI";
+			//   "Tweaks" app > Fonts > Scaling Factor (0,5 - 3)
+			desktopPropertyName2 = "gnome.Xft/DPI";
 		}
 		if( desktopPropertyName != null ) {
 			desktopPropertyListener = e -> {
 				String propertyName = e.getPropertyName();
-				if( desktopPropertyName.equals( propertyName ) )
+				if( desktopPropertyName.equals( propertyName ) || propertyName.equals( desktopPropertyName2 ) )
 					reSetLookAndFeel();
 				else if( DESKTOPFONTHINTS.equals( propertyName ) ) {
 					if( UIManager.getLookAndFeel() instanceof FlatLaf ) {
@@ -190,6 +184,8 @@ public abstract class FlatLaf
 			};
 			Toolkit toolkit = Toolkit.getDefaultToolkit();
 			toolkit.addPropertyChangeListener( desktopPropertyName, desktopPropertyListener );
+			if( desktopPropertyName2 != null )
+				toolkit.addPropertyChangeListener( desktopPropertyName2, desktopPropertyListener );
 			toolkit.addPropertyChangeListener( DESKTOPFONTHINTS, desktopPropertyListener );
 		}
 
@@ -212,15 +208,24 @@ public abstract class FlatLaf
 		if( desktopPropertyListener != null ) {
 			Toolkit toolkit = Toolkit.getDefaultToolkit();
 			toolkit.removePropertyChangeListener( desktopPropertyName, desktopPropertyListener );
+			if( desktopPropertyName2 != null )
+				toolkit.removePropertyChangeListener( desktopPropertyName2, desktopPropertyListener );
 			toolkit.removePropertyChangeListener( DESKTOPFONTHINTS, desktopPropertyListener );
 			desktopPropertyName = null;
+			desktopPropertyName2 = null;
 			desktopPropertyListener = null;
 		}
 
-		// remove mnemonic listener
-		if( mnemonicListener != null ) {
-			KeyboardFocusManager.getCurrentKeyboardFocusManager().removeKeyEventPostProcessor( mnemonicListener );
-			mnemonicListener = null;
+		// uninstall popup factory
+		if( oldPopupFactory != null ) {
+			PopupFactory.setSharedInstance( oldPopupFactory );
+			oldPopupFactory = null;
+		}
+
+		// uninstall mnemonic handler
+		if( mnemonicHandler != null ) {
+			mnemonicHandler.uninstall();
+			mnemonicHandler = null;
 		}
 
 		// restore default link color
@@ -273,8 +278,8 @@ public abstract class FlatLaf
 	public UIDefaults getDefaults() {
 		UIDefaults defaults = super.getDefaults();
 
-		// add Metal resource bundle, which is required for FlatFileChooserUI
-		defaults.addResourceBundle( "com.sun.swing.internal.plaf.metal.resources.metal" );
+		// add resource bundle for localized texts
+		defaults.addResourceBundle( "com.formdev.flatlaf.resources.Bundle" );
 
 		// initialize some defaults (for overriding) that are used in UI delegates,
 		// but are not set in BasicLookAndFeel
@@ -321,9 +326,13 @@ public abstract class FlatLaf
 			UIDefaultsLoader.loadDefaultsFromProperties( getClass(), addons, getAdditionalDefaults(), isDark(), defaults );
 
 		// use Aqua MenuBarUI if Mac screen menubar is enabled
-		if( SystemInfo.IS_MAC && Boolean.getBoolean( "apple.laf.useScreenMenuBar" ) )
+		if( SystemInfo.IS_MAC && Boolean.getBoolean( "apple.laf.useScreenMenuBar" ) ) {
 			defaults.put( "MenuBarUI", "com.apple.laf.AquaMenuBarUI" );
 
+			// add defaults necessary for AquaMenuBarUI
+			defaults.put( "MenuBar.backgroundPainter", BorderFactory.createEmptyBorder() );
+		}
+
 		// initialize text antialiasing
 		putAATextInfo( defaults );
 
@@ -334,6 +343,11 @@ public abstract class FlatLaf
 		for( FlatDefaultsAddon addon : addons )
 			addon.afterDefaultsLoading( this, defaults );
 
+		// add user scale factor to allow layout managers (e.g. MigLayout) to use it
+		defaults.put( "laf.scaleFactor", (ActiveValue) t -> {
+			return UIScale.getUserScaleFactor();
+		} );
+
 		if( postInitialization != null ) {
 			postInitialization.accept( defaults );
 			postInitialization = null;
@@ -363,7 +377,10 @@ public abstract class FlatLaf
 
 		} else if( SystemInfo.IS_MAC ) {
 			String fontName;
-			if( SystemInfo.IS_MAC_OS_10_11_EL_CAPITAN_OR_LATER ) {
+			if( SystemInfo.IS_MAC_OS_10_15_CATALINA_OR_LATER ) {
+				// use Helvetica Neue font
+				fontName = "Helvetica Neue";
+			} else if( SystemInfo.IS_MAC_OS_10_11_EL_CAPITAN_OR_LATER ) {
 				// use San Francisco Text font
 				fontName = ".SF NS Text";
 			} else {
@@ -405,7 +422,7 @@ public abstract class FlatLaf
 		// using StyleContext.getFont() here because it uses
 		// sun.font.FontUtilities.getCompositeFontUIResource()
 		// and creates a composite font that is able to display all Unicode characters
-		Font font = new StyleContext().getFont( family, style, size );
+		Font font = StyleContext.getDefaultStyleContext().getFont( family, style, size );
 		return (font instanceof FontUIResource) ? (FontUIResource) font : new FontUIResource( font );
 	}
 
@@ -422,30 +439,14 @@ public abstract class FlatLaf
 	 *   <a href="https://jetbrains.design/intellij/principles/icons/#action-icons">Action icons</a>
 	 * and
 	 *   <a href="https://jetbrains.design/intellij/principles/icons/#noun-icons">Noun icons</a>
+	 * <p>
+	 * These colors may be changed by IntelliJ Platform themes.
 	 */
 	public static void initIconColors( UIDefaults defaults, boolean dark ) {
-		// colors for action icons
-		// see https://jetbrains.design/intellij/principles/icons/#action-icons
-		defaults.put( "Actions.Red",            new ColorUIResource( !dark ? 0xDB5860 : 0xC75450 ) );
-		defaults.put( "Actions.Yellow",         new ColorUIResource( !dark ? 0xEDA200 : 0xF0A732 ) );
-		defaults.put( "Actions.Green",          new ColorUIResource( !dark ? 0x59A869 : 0x499C54 ) );
-		defaults.put( "Actions.Blue",           new ColorUIResource( !dark ? 0x389FD6 : 0x3592C4 ) );
-		defaults.put( "Actions.Grey",           new ColorUIResource( !dark ? 0x6E6E6E : 0xAFB1B3 ) );
-		defaults.put( "Actions.GreyInline",     new ColorUIResource( !dark ? 0x7F8B91 : 0x7F8B91 ) );
-
-		// colors for object icons
-		// see https://jetbrains.design/intellij/principles/icons/#noun-icons
-		defaults.put( "Objects.Grey",           new ColorUIResource( 0x9AA7B0 ) );
-		defaults.put( "Objects.Blue",           new ColorUIResource( 0x40B6E0 ) );
-		defaults.put( "Objects.Green",          new ColorUIResource( 0x62B543 ) );
-		defaults.put( "Objects.Yellow",         new ColorUIResource( 0xF4AF3D ) );
-		defaults.put( "Objects.YellowDark",     new ColorUIResource( 0xD9A343 ) );
-		defaults.put( "Objects.Purple",         new ColorUIResource( 0xB99BF8 ) );
-		defaults.put( "Objects.Pink",           new ColorUIResource( 0xF98B9E ) );
-		defaults.put( "Objects.Red",            new ColorUIResource( 0xF26522 ) );
-		defaults.put( "Objects.RedStatus",      new ColorUIResource( 0xE05555 ) );
-		defaults.put( "Objects.GreenAndroid",   new ColorUIResource( 0xA4C639 ) );
-		defaults.put( "Objects.BlackText",      new ColorUIResource( 0x231F20 ) );
+		for( FlatIconColors c : FlatIconColors.values() ) {
+			if( c.light == !dark || c.dark == dark )
+				defaults.put( c.key, new ColorUIResource( c.rgb ) );
+		}
 	}
 
 	private void putAATextInfo( UIDefaults defaults ) {
@@ -535,86 +536,15 @@ public abstract class FlatLaf
 	}
 
 	public static boolean isShowMnemonics() {
-		return showMnemonics || !UIManager.getBoolean( "Component.hideMnemonics" );
+		return MnemonicHandler.isShowMnemonics();
 	}
 
-	private static void checkShowMnemonics( KeyEvent e ) {
-		int keyCode = e.getKeyCode();
-		if( SystemInfo.IS_MAC ) {
-			// Ctrl+Alt keys must be pressed on Mac
-			if( keyCode == KeyEvent.VK_CONTROL || keyCode == KeyEvent.VK_ALT )
-				showMnemonics( e.getID() == KeyEvent.KEY_PRESSED && e.isControlDown() && e.isAltDown(), e.getComponent() );
-		} else {
-			// Alt key must be pressed on Windows and Linux
-			if( keyCode == KeyEvent.VK_ALT )
-				showMnemonics( e.getID() == KeyEvent.KEY_PRESSED, e.getComponent() );
-		}
+	public static void showMnemonics( Component c ) {
+		MnemonicHandler.showMnemonics( true, c );
 	}
 
-	private static void showMnemonics( boolean show, Component c ) {
-		if( show == showMnemonics )
-			return;
-
-		showMnemonics = show;
-
-		// check whether it is necessary to repaint
-		if( !UIManager.getBoolean( "Component.hideMnemonics" ) )
-			return;
-
-		if( show ) {
-			// get root pane
-			JRootPane rootPane = SwingUtilities.getRootPane( c );
-			if( rootPane == null )
-				return;
-
-			// get window
-			Window window = SwingUtilities.getWindowAncestor( rootPane );
-			if( window == null )
-				return;
-
-			// repaint components with mnemonics in focused window
-			repaintMnemonics( window );
-
-			lastShowMnemonicWindow = new WeakReference<>( window );
-		} else if( lastShowMnemonicWindow != null ) {
-			Window window = lastShowMnemonicWindow.get();
-			if( window != null )
-				repaintMnemonics( window );
-
-			lastShowMnemonicWindow = null;
-		}
-	}
-
-	private static void repaintMnemonics( Container container ) {
-		for( Component c : container.getComponents() ) {
-			if( !c.isVisible() )
-				continue;
-
-			if( hasMnemonic( c ) )
-				c.repaint();
-
-			if( c instanceof Container )
-				repaintMnemonics( (Container) c );
-		}
-	}
-
-	private static boolean hasMnemonic( Component c ) {
-		if( c instanceof JLabel && ((JLabel)c).getDisplayedMnemonicIndex() >= 0 )
-			return true;
-
-		if( c instanceof AbstractButton && ((AbstractButton)c).getDisplayedMnemonicIndex() >= 0 )
-			return true;
-
-		if( c instanceof JTabbedPane ) {
-			JTabbedPane tabPane = (JTabbedPane) c;
-			int tabCount = tabPane.getTabCount();
-			for( int i = 0; i < tabCount; i++ ) {
-				if( tabPane.getDisplayedMnemonicIndexAt( i ) >= 0 )
-					return true;
-			}
-		}
-
-		return false;
+	public static void hideMnemonics() {
+		MnemonicHandler.showMnemonics( false, null );
 	}
 
 	//---- class ActiveFont ---------------------------------------------------

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

@@ -32,12 +32,12 @@ public class FlatLightLaf
 
 	@Override
 	public String getName() {
-		return "Flat Light";
+		return "FlatLaf Light";
 	}
 
 	@Override
 	public String getDescription() {
-		return "Flat Light Look and Feel";
+		return "FlatLaf Light Look and Feel";
 	}
 
 	@Override

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

@@ -0,0 +1,122 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Properties;
+
+/**
+ * A Flat LaF that is able to load UI defaults from properties passed to the constructor.
+ * <p>
+ * Specify the base theme in the properties with {@code @baseTheme=<baseTheme>}.
+ * Allowed values for {@code <baseTheme>} are {@code light} (the default), {@code dark},
+ * {@code intellij} or {@code darcula}.
+ * <p>
+ * The properties are applied after loading the base theme and may overwrite base properties.
+ * All features of FlatLaf properties files are available.
+ *
+ * @author Karl Tauber
+ */
+public class FlatPropertiesLaf
+	extends FlatLaf
+{
+	private final String name;
+	private final String baseTheme;
+	private final boolean dark;
+	private final Properties properties;
+
+	public FlatPropertiesLaf( String name, File propertiesFile )
+		throws IOException
+	{
+		this( name, new FileInputStream( propertiesFile ) );
+	}
+
+	public FlatPropertiesLaf( String name, InputStream in )
+		throws IOException
+	{
+		this( name, loadProperties( in ) );
+	}
+
+	private static Properties loadProperties( InputStream in )
+		throws IOException
+	{
+		Properties properties = new Properties();
+		try( InputStream in2 = in ) {
+			properties.load( in2 );
+		}
+		return properties;
+	}
+
+	public FlatPropertiesLaf( String name, Properties properties ) {
+		this.name = name;
+		this.properties = properties;
+
+		baseTheme = properties.getProperty( "@baseTheme", "light" );
+		dark = "dark".equalsIgnoreCase( baseTheme ) || "darcula".equalsIgnoreCase( baseTheme );
+	}
+
+	@Override
+	public String getName() {
+		return name;
+	}
+
+	@Override
+	public String getDescription() {
+		return name;
+	}
+
+	@Override
+	public boolean isDark() {
+		return dark;
+	}
+
+	@Override
+	protected ArrayList<Class<?>> getLafClassesForDefaultsLoading() {
+		ArrayList<Class<?>> lafClasses = new ArrayList<>();
+		lafClasses.add( FlatLaf.class );
+		switch( baseTheme.toLowerCase() ) {
+			default:
+			case "light":
+				lafClasses.add( FlatLightLaf.class );
+				break;
+
+			case "dark":
+				lafClasses.add( FlatDarkLaf.class );
+				break;
+
+			case "intellij":
+				lafClasses.add( FlatLightLaf.class );
+				lafClasses.add( FlatIntelliJLaf.class );
+				break;
+
+			case "darcula":
+				lafClasses.add( FlatDarkLaf.class );
+				lafClasses.add( FlatDarculaLaf.class );
+				break;
+		}
+		return lafClasses;
+	}
+
+	@Override
+	protected Properties getAdditionalDefaults() {
+		return properties;
+	}
+}

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

@@ -240,7 +240,7 @@ public class IntelliJTheme
 			if( color != null ) {
 				String key = e.getKey();
 				namedColors.put( key, color );
-				defaults.put( "ColorPalette." + e.getKey(), color );
+				defaults.put( "ColorPalette." + key, color );
 			}
 		}
 	}
@@ -467,6 +467,12 @@ public class IntelliJTheme
 		uiKeyMapping.put( "ComboBox.ArrowButton.iconColor",             "ComboBox.buttonArrowColor" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.nonEditableBackground", "ComboBox.buttonBackground" );
 
+		// Component
+		uiKeyMapping.put( "Component.inactiveErrorFocusColor",   "Component.error.borderColor" );
+		uiKeyMapping.put( "Component.errorFocusColor",           "Component.error.focusedBorderColor" );
+		uiKeyMapping.put( "Component.inactiveWarningFocusColor", "Component.warning.borderColor" );
+		uiKeyMapping.put( "Component.warningFocusColor",         "Component.warning.focusedBorderColor" );
+
 		// Link
 		uiKeyMapping.put( "Link.activeForeground", "Component.linkColor" );
 

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

@@ -74,6 +74,13 @@ class LinuxFontPolicy
 				family = family.isEmpty() ? word : (family + ' ' + word);
 		}
 
+		// Ubuntu font is rendered poorly (except if running in JetBrains VM)
+		// --> use Liberation Sans font
+		if( family.startsWith( "Ubuntu" ) &&
+			!SystemInfo.IS_JETBRAINS_JVM &&
+			!Boolean.parseBoolean( System.getProperty( "flatlaf.useUbuntuFont" ) ) )
+		  family = "Liberation Sans";
+
 		// scale font size
 		double dsize = size * getGnomeFontScale();
 		size = (int) (dsize + 0.5);

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

@@ -0,0 +1,259 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf;
+
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.EventQueue;
+import java.awt.KeyEventPostProcessor;
+import java.awt.KeyboardFocusManager;
+import java.awt.Window;
+import java.awt.event.KeyEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowListener;
+import java.lang.ref.WeakReference;
+import javax.swing.AbstractButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JRootPane;
+import javax.swing.JTabbedPane;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+import com.formdev.flatlaf.util.SystemInfo;
+
+/**
+ * Show/hide mnemonics.
+ *
+ * @author Karl Tauber
+ */
+class MnemonicHandler
+	implements KeyEventPostProcessor, ChangeListener
+{
+	private static boolean showMnemonics;
+	private static WeakReference<Window> lastShowMnemonicWindow;
+	private static WindowListener windowListener;
+
+	static boolean isShowMnemonics() {
+		return showMnemonics || !UIManager.getBoolean( "Component.hideMnemonics" );
+	}
+
+	void install() {
+		KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventPostProcessor( this );
+		MenuSelectionManager.defaultManager().addChangeListener( this );
+	}
+
+	void uninstall() {
+		KeyboardFocusManager.getCurrentKeyboardFocusManager().removeKeyEventPostProcessor( this );
+		MenuSelectionManager.defaultManager().removeChangeListener( this );
+	}
+
+	@Override
+	public boolean postProcessKeyEvent( KeyEvent e ) {
+		int keyCode = e.getKeyCode();
+		if( SystemInfo.IS_MAC ) {
+			// Ctrl+Alt keys must be pressed on Mac
+			if( keyCode == KeyEvent.VK_CONTROL || keyCode == KeyEvent.VK_ALT )
+				showMnemonics( shouldShowMnemonics( e ) && e.isControlDown() && e.isAltDown(), e.getComponent() );
+		} else {
+			// Alt key must be pressed on Windows and Linux
+			if( SystemInfo.IS_WINDOWS )
+				return processKeyEventOnWindows( e );
+
+			if( keyCode == KeyEvent.VK_ALT )
+				showMnemonics( shouldShowMnemonics( e ), e.getComponent() );
+		}
+
+		return false;
+	}
+
+	private boolean shouldShowMnemonics( KeyEvent e ) {
+		return e.getID() == KeyEvent.KEY_PRESSED ||
+			MenuSelectionManager.defaultManager().getSelectedPath().length > 0;
+	}
+
+	private static int altPressedEventCount;
+	private static boolean selectMenuOnAltReleased;
+
+	/**
+	 * Special Alt key behavior on Windows.
+	 *
+	 * Press-and-release Alt key selects first menu (if available) and moves focus
+	 * temporary to menu bar. If menu bar has focus (some menu is selected),
+	 * pressing Alt key unselects menu and moves focus back to permanent focus owner.
+	 */
+	private boolean processKeyEventOnWindows( KeyEvent e ) {
+		if( e.getKeyCode() != KeyEvent.VK_ALT ) {
+			selectMenuOnAltReleased = false;
+			return false;
+		}
+
+		if( e.getID() == KeyEvent.KEY_PRESSED ) {
+			altPressedEventCount++;
+
+			if( altPressedEventCount == 1 && !e.isConsumed() ) {
+				MenuSelectionManager menuSelectionManager = MenuSelectionManager.defaultManager();
+				selectMenuOnAltReleased = (menuSelectionManager.getSelectedPath().length == 0);
+
+				// if menu is selected when Alt key is pressed then clear menu selection
+				if( !selectMenuOnAltReleased )
+					menuSelectionManager.clearSelectedPath();
+			}
+
+			// show mnemonics
+			showMnemonics( shouldShowMnemonics( e ), e.getComponent() );
+
+			// avoid that the system menu of the window gets focus
+			e.consume();
+			return true;
+
+		} else if( e.getID() == KeyEvent.KEY_RELEASED ) {
+			altPressedEventCount = 0;
+
+			boolean mnemonicsShown = false;
+			if( selectMenuOnAltReleased && !e.isConsumed() ) {
+				MenuSelectionManager menuSelectionManager = MenuSelectionManager.defaultManager();
+				if( menuSelectionManager.getSelectedPath().length == 0 ) {
+					// get menu bar and first menu
+					Component c = e.getComponent();
+					JRootPane rootPane = SwingUtilities.getRootPane( c );
+					Window window = (rootPane != null) ? SwingUtilities.getWindowAncestor( rootPane ) : null;
+					JMenuBar menuBar = (rootPane != null) ? rootPane.getJMenuBar() : null;
+					if( menuBar == null && window instanceof JFrame )
+						menuBar = ((JFrame)window).getJMenuBar();
+					JMenu firstMenu = (menuBar != null) ? menuBar.getMenu( 0 ) : null;
+
+					// select first menu and show mnemonics
+					if( firstMenu != null ) {
+						menuSelectionManager.setSelectedPath( new MenuElement[] { menuBar, firstMenu } );
+						showMnemonics( true, c );
+						mnemonicsShown = true;
+					}
+				}
+			}
+			selectMenuOnAltReleased = false;
+
+			// hide mnemonics
+			if( !mnemonicsShown )
+				showMnemonics( shouldShowMnemonics( e ), e.getComponent() );
+		}
+		return false;
+	}
+
+	@Override
+	public void stateChanged( ChangeEvent e ) {
+		MenuElement[] selectedPath = MenuSelectionManager.defaultManager().getSelectedPath();
+		if( selectedPath.length == 0 && altPressedEventCount == 0 ) {
+			// hide mnemonics when menu selection was canceled
+			showMnemonics( false, null );
+		}
+	}
+
+	static void showMnemonics( boolean show, Component c ) {
+		if( show == showMnemonics )
+			return;
+
+		showMnemonics = show;
+
+		// check whether it is necessary to repaint
+		if( !UIManager.getBoolean( "Component.hideMnemonics" ) )
+			return;
+
+		if( show ) {
+			// get root pane
+			JRootPane rootPane = SwingUtilities.getRootPane( c );
+			if( rootPane == null )
+				return;
+
+			// get window
+			Window window = SwingUtilities.getWindowAncestor( rootPane );
+			if( window == null )
+				return;
+
+			// repaint components with mnemonics in focused window
+			repaintMnemonics( window );
+
+			// hide mnemonics if window is deactivated (e.g. Alt+Tab to another window)
+			windowListener = new WindowAdapter() {
+				@Override
+				public void windowDeactivated( WindowEvent e ) {
+					altPressedEventCount = 0;
+					selectMenuOnAltReleased = false;
+
+					// use invokeLater() to avoid that the listener is removed
+					// while the listener queue is iterated to fire this event
+					EventQueue.invokeLater( () -> {
+						showMnemonics( false, null );
+					} );
+				}
+			};
+			window.addWindowListener( windowListener );
+
+			lastShowMnemonicWindow = new WeakReference<>( window );
+		} else if( lastShowMnemonicWindow != null ) {
+			Window window = lastShowMnemonicWindow.get();
+			if( window != null ) {
+				repaintMnemonics( window );
+
+				if( windowListener != null ) {
+					window.removeWindowListener( windowListener );
+					windowListener = null;
+				}
+			}
+
+			lastShowMnemonicWindow = null;
+		}
+	}
+
+	private static void repaintMnemonics( Container container ) {
+		for( Component c : container.getComponents() ) {
+			if( !c.isVisible() )
+				continue;
+
+			if( hasMnemonic( c ) )
+				c.repaint();
+
+			if( c instanceof Container )
+				repaintMnemonics( (Container) c );
+		}
+	}
+
+	private static boolean hasMnemonic( Component c ) {
+		if( c instanceof JLabel && ((JLabel)c).getDisplayedMnemonicIndex() >= 0 )
+			return true;
+
+		if( c instanceof AbstractButton && ((AbstractButton)c).getDisplayedMnemonicIndex() >= 0 )
+			return true;
+
+		if( c instanceof JTabbedPane ) {
+			JTabbedPane tabPane = (JTabbedPane) c;
+			int tabCount = tabPane.getTabCount();
+			for( int i = 0; i < tabCount; i++ ) {
+				if( tabPane.getDisplayedMnemonicIndexAt( i ) >= 0 )
+					return true;
+			}
+		}
+
+		return false;
+	}
+}

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

@@ -40,6 +40,7 @@ import javax.swing.plaf.InsetsUIResource;
 import com.formdev.flatlaf.ui.FlatEmptyBorder;
 import com.formdev.flatlaf.ui.FlatLineBorder;
 import com.formdev.flatlaf.util.ColorFunctions;
+import com.formdev.flatlaf.util.ColorFunctions.ColorFunction;
 import com.formdev.flatlaf.util.DerivedColor;
 import com.formdev.flatlaf.util.GrayFilter;
 import com.formdev.flatlaf.util.HSLColor;
@@ -63,8 +64,6 @@ class UIDefaultsLoader
 	private static final String TYPE_PREFIX = "{";
 	private static final String TYPE_PREFIX_END = "}";
 	private static final String VARIABLE_PREFIX = "@";
-	@Deprecated
-	private static final String REF_PREFIX = VARIABLE_PREFIX + "@";
 	private static final String PROPERTY_PREFIX = "$";
 	private static final String OPTIONAL_PREFIX = "?";
 	private static final String GLOBAL_PREFIX = "*.";
@@ -213,12 +212,6 @@ class UIDefaultsLoader
 		else if( !value.startsWith( VARIABLE_PREFIX ) )
 			return value;
 
-		// for compatibility
-		if( value.startsWith( REF_PREFIX ) ) {
-			FlatLaf.LOG.log( Level.WARNING, "FlatLaf: Usage of '@@' in .properties files is deprecated. Use '$' instead." );
-			value = value.substring( REF_PREFIX.length() );
-		}
-
 		boolean optional = false;
 		if( value.startsWith( OPTIONAL_PREFIX ) ) {
 			value = value.substring( OPTIONAL_PREFIX.length() );
@@ -515,29 +508,42 @@ class UIDefaultsLoader
 			throw new IllegalArgumentException( "missing parameters in function '" + value + "'" );
 
 		switch( function ) {
-			case "rgb":			return parseColorRgbOrRgba( false, params );
-			case "rgba":		return parseColorRgbOrRgba( true, params );
+			case "rgb":			return parseColorRgbOrRgba( false, params, resolver, reportError );
+			case "rgba":		return parseColorRgbOrRgba( true, params, resolver, reportError );
 			case "hsl":			return parseColorHslOrHsla( false, params );
 			case "hsla":		return parseColorHslOrHsla( true, params );
-			case "lighten":		return parseColorLightenOrDarken( true, params, resolver, reportError );
-			case "darken":		return parseColorLightenOrDarken( false, params, resolver, reportError );
+			case "lighten":		return parseColorHSLIncreaseDecrease( 2, true, params, resolver, reportError );
+			case "darken":		return parseColorHSLIncreaseDecrease( 2, false, params, resolver, reportError );
+			case "saturate":	return parseColorHSLIncreaseDecrease( 1, true, params, resolver, reportError );
+			case "desaturate":	return parseColorHSLIncreaseDecrease( 1, false, params, resolver, reportError );
 		}
 
 		throw new IllegalArgumentException( "unknown color function '" + value + "'" );
 	}
 
 	/**
-	 * Syntax: rgb(red,green,blue) or rgba(red,green,blue,alpha)
-	 *   - red: an integer 0-255
-	 *   - green: an integer 0-255
-	 *   - blue: an integer 0-255
-	 *   - alpha: an integer 0-255
+	 * Syntax: rgb(red,green,blue) or rgba(red,green,blue,alpha) or rgba(color,alpha)
+	 *   - red:   an integer 0-255 or a percentage 0-100%
+	 *   - green: an integer 0-255 or a percentage 0-100%
+	 *   - blue:  an integer 0-255 or a percentage 0-100%
+	 *   - alpha: an integer 0-255 or a percentage 0-100%
 	 */
-	private static ColorUIResource parseColorRgbOrRgba( boolean hasAlpha, List<String> params ) {
-		int red = parseInteger( params.get( 0 ), 0, 255 );
-		int green = parseInteger( params.get( 1 ), 0, 255 );
-		int blue = parseInteger( params.get( 2 ), 0, 255 );
-		int alpha = hasAlpha ? parseInteger( params.get( 3 ), 0, 255 ) : 255;
+	private static ColorUIResource parseColorRgbOrRgba( boolean hasAlpha, List<String> params,
+		Function<String, String> resolver, boolean reportError )
+	{
+		if( hasAlpha && params.size() == 2 ) {
+			// syntax rgba(color,alpha), which allows adding alpha to any color
+			String colorStr = params.get( 0 );
+			int alpha = parseInteger( params.get( 1 ), 0, 255, true );
+
+			ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver, reportError );
+			return new ColorUIResource( new Color( ((alpha & 0xff) << 24) | (color.getRGB() & 0xffffff), true ) );
+		}
+
+		int red = parseInteger( params.get( 0 ), 0, 255, true );
+		int green = parseInteger( params.get( 1 ), 0, 255, true );
+		int blue = parseInteger( params.get( 2 ), 0, 255, true );
+		int alpha = hasAlpha ? parseInteger( params.get( 3 ), 0, 255, true ) : 255;
 
 		return hasAlpha
 			? new ColorUIResource( new Color( red, green, blue, alpha ) )
@@ -552,7 +558,7 @@ class UIDefaultsLoader
 	 *   - alpha: a percentage 0-100%
 	 */
 	private static ColorUIResource parseColorHslOrHsla( boolean hasAlpha, List<String> params ) {
-		int hue = parseInteger( params.get( 0 ), 0, 360 );
+		int hue = parseInteger( params.get( 0 ), 0, 360, false );
 		int saturation = parsePercentage( params.get( 1 ) );
 		int lightness = parsePercentage( params.get( 2 ) );
 		int alpha = hasAlpha ? parsePercentage( params.get( 3 ) ) : 100;
@@ -562,13 +568,14 @@ class UIDefaultsLoader
 	}
 
 	/**
-	 * Syntax: lighten(color,amount[,options]) or darken(color,amount[,options])
+	 * Syntax: lighten(color,amount[,options]) or darken(color,amount[,options]) or
+	 *         saturate(color,amount[,options]) or desaturate(color,amount[,options])
 	 *   - color: a color (e.g. #f00) or a color function
 	 *   - amount: percentage 0-100%
-	 *   - options: [relative] [autoInverse] [lazy] [derived]
+	 *   - options: [relative] [autoInverse] [noAutoInverse] [lazy] [derived]
 	 */
-	private static Object parseColorLightenOrDarken( boolean lighten, List<String> params,
-		Function<String, String> resolver, boolean reportError )
+	private static Object parseColorHSLIncreaseDecrease( int hslIndex, boolean increase,
+		List<String> params, Function<String, String> resolver, boolean reportError )
 	{
 		String colorStr = params.get( 0 );
 		int amount = parsePercentage( params.get( 1 ) );
@@ -583,16 +590,15 @@ class UIDefaultsLoader
 			autoInverse = options.contains( "autoInverse" );
 			lazy = options.contains( "lazy" );
 			derived = options.contains( "derived" );
+
+			// use autoInverse by default for derived colors, except if noAutoInverse is set
+			if( derived && !options.contains( "noAutoInverse" ) )
+				autoInverse = true;
 		}
 
-		ColorFunctions.ColorFunction function = lighten
-			? new ColorFunctions.Lighten( amount, relative, autoInverse )
-			: new ColorFunctions.Darken( amount, relative, autoInverse );
-
-		if( derived ) {
-			ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver, reportError );
-			return new DerivedColor( ColorFunctions.applyFunctions( color, function ), function );
-		}
+		// create function
+		ColorFunction function = new ColorFunctions.HSLIncreaseDecrease(
+			hslIndex, increase, amount, relative, autoInverse );
 
 		if( lazy ) {
 			return (LazyValue) t -> {
@@ -603,8 +609,29 @@ class UIDefaultsLoader
 			};
 		}
 
-		ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver, reportError );
-		return new ColorUIResource( ColorFunctions.applyFunctions( color, function ) );
+		// parse base color
+		String resolvedColorStr = resolver.apply( colorStr );
+		ColorUIResource baseColor = (ColorUIResource) parseColorOrFunction( resolvedColorStr, resolver, reportError );
+
+		// apply this function to base color
+		Color newColor = ColorFunctions.applyFunctions( baseColor, function );
+
+		if( derived ) {
+			ColorFunction[] functions;
+			if( baseColor instanceof DerivedColor && resolvedColorStr == colorStr ) {
+				// if the base color is also derived, join the color functions
+				// but only if base color function is specified directly in this function
+				ColorFunction[] baseFunctions = ((DerivedColor)baseColor).getFunctions();
+				functions = new ColorFunction[baseFunctions.length + 1];
+				System.arraycopy( baseFunctions, 0, functions, 0, baseFunctions.length );
+				functions[baseFunctions.length] = function;
+			} else
+				functions = new ColorFunction[] { function };
+
+			return new DerivedColor( newColor, functions );
+		}
+
+		return new ColorUIResource( newColor );
 	}
 
 	private static int parsePercentage( String value ) {
@@ -629,7 +656,12 @@ class UIDefaultsLoader
 		return value.charAt( 0 );
 	}
 
-	private static Integer parseInteger( String value, int min, int max ) {
+	private static Integer parseInteger( String value, int min, int max, boolean allowPercentage ) {
+		if( allowPercentage && value.endsWith( "%" ) ) {
+			int percent = parsePercentage( value );
+			return (max * percent) / 100;
+		}
+
 		Integer integer = parseInteger( value, true );
 		if( integer.intValue() < min || integer.intValue() > max )
 			throw new NumberFormatException( "integer '" + value + "' out of range (" + min + '-' + max + ')' );

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

@@ -111,13 +111,13 @@ public class FlatCheckBoxIcon
 		paintBorder( g2 );
 
 		// paint background
-		FlatUIUtils.setColor( g2, FlatButtonUI.buttonStateColor( c,
+		g2.setColor( FlatUIUtils.deriveColor( FlatButtonUI.buttonStateColor( c,
 			selected ? selectedBackground : background,
 			disabledBackground,
 			focusedBackground,
 			selected && selectedHoverBackground != null ? selectedHoverBackground : hoverBackground,
 			selected && selectedPressedBackground != null ? selectedPressedBackground : pressedBackground ),
-			background );
+			background ) );
 		paintBackground( g2 );
 
 		// paint checkmark

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

@@ -30,7 +30,8 @@ import javax.swing.UIManager;
  *
  * @uiDefault MenuItemCheckBox.icon.checkmarkColor				Color
  * @uiDefault MenuItemCheckBox.icon.disabledCheckmarkColor		Color
- * @uiDefault Menu.selectionForeground							Color
+ * @uiDefault MenuItem.selectionForeground						Color
+ * @uiDefault MenuItem.selectionType							String
  *
  * @author Karl Tauber
  */
@@ -39,7 +40,7 @@ public class FlatCheckBoxMenuItemIcon
 {
 	protected final Color checkmarkColor = UIManager.getColor( "MenuItemCheckBox.icon.checkmarkColor" );
 	protected final Color disabledCheckmarkColor = UIManager.getColor( "MenuItemCheckBox.icon.disabledCheckmarkColor" );
-	protected final Color selectionForeground = UIManager.getColor( "Menu.selectionForeground" );
+	protected final Color selectionForeground = UIManager.getColor( "MenuItem.selectionForeground" );
 
 	public FlatCheckBoxMenuItemIcon() {
 		super( 15, 15, null );
@@ -67,9 +68,14 @@ public class FlatCheckBoxMenuItemIcon
 	}
 
 	private Color getCheckmarkColor( Component c ) {
-		if( c instanceof JMenuItem && ((JMenuItem)c).isArmed() )
+		if( c instanceof JMenuItem && ((JMenuItem)c).isArmed() && !isUnderlineSelection() )
 			return selectionForeground;
 
 		return c.isEnabled() ? checkmarkColor : disabledCheckmarkColor;
 	}
+
+	private boolean isUnderlineSelection() {
+		// not storing value of "MenuItem.selectionType" in class to allow changing at runtime
+		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
+	}
 }

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

@@ -100,12 +100,12 @@ public class FlatHelpButtonIcon
 		g2.fill( new Ellipse2D.Float( focusWidth + 0.5f, focusWidth + 0.5f, 21, 21 ) );
 
 		// paint background
-		FlatUIUtils.setColor( g2, FlatButtonUI.buttonStateColor( c,
+		g2.setColor( FlatUIUtils.deriveColor( FlatButtonUI.buttonStateColor( c,
 			background,
 			disabledBackground,
 			focusedBackground,
 			hoverBackground,
-			pressedBackground ), background );
+			pressedBackground ), background ) );
 		g2.fill( new Ellipse2D.Float( focusWidth + 1.5f, focusWidth + 1.5f, 19, 19 ) );
 
 		// paint question mark

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

@@ -27,6 +27,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 /**
  * Base class for internal frame icons.
  *
+ * @uiDefault InternalFrame.buttonSize					Dimension
  * @uiDefault InternalFrame.buttonHoverBackground		Color
  * @uiDefault InternalFrame.buttonPressedBackground		Color
  *
@@ -53,7 +54,7 @@ public abstract class FlatInternalFrameAbstractIcon
 	protected void paintBackground( Component c, Graphics2D g ) {
 		Color background = FlatButtonUI.buttonStateColor( c, null, null, null, hoverBackground, pressedBackground );
 		if( background != null ) {
-			FlatUIUtils.setColor( g, background, c.getBackground() );
+			g.setColor( FlatUIUtils.deriveColor( background, c.getBackground() ) );
 			g.fillRect( 0, 0, width, height );
 		}
 	}

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

@@ -28,8 +28,11 @@ import com.formdev.flatlaf.ui.FlatButtonUI;
 /**
  * "close" icon for {@link javax.swing.JInternalFrame}.
  *
- * @uiDefault InternalFrame.buttonHoverBackground		Color
- * @uiDefault InternalFrame.buttonPressedBackground		Color
+ * @uiDefault InternalFrame.buttonSize					Dimension
+ * @uiDefault InternalFrame.closeHoverBackground		Color
+ * @uiDefault InternalFrame.closePressedBackground		Color
+ * @uiDefault InternalFrame.closeHoverForeground		Color
+ * @uiDefault InternalFrame.closePressedForeground		Color
  *
  * @author Karl Tauber
  */

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

@@ -24,14 +24,14 @@ import java.awt.geom.Rectangle2D;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
- * "minimize" (actually "restore") icon for {@link javax.swing.JInternalFrame}.
+ * "restore" (or "minimize") icon for {@link javax.swing.JInternalFrame}.
  *
  * @author Karl Tauber
  */
-public class FlatInternalFrameMinimizeIcon
+public class FlatInternalFrameRestoreIcon
 	extends FlatInternalFrameAbstractIcon
 {
-	public FlatInternalFrameMinimizeIcon() {
+	public FlatInternalFrameRestoreIcon() {
 	}
 
 	@Override

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

@@ -32,6 +32,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  * @uiDefault Menu.icon.arrowColor				Color
  * @uiDefault Menu.icon.disabledArrowColor		Color
  * @uiDefault Menu.selectionForeground			Color
+ * @uiDefault MenuItem.selectionType			String
  *
  * @author Karl Tauber
  */
@@ -65,9 +66,14 @@ public class FlatMenuArrowIcon
 	}
 
 	private Color getArrowColor( Component c ) {
-		if( c instanceof JMenu && ((JMenu)c).isSelected() )
+		if( c instanceof JMenu && ((JMenu)c).isSelected() && !isUnderlineSelection() )
 			return selectionForeground;
 
 		return c.isEnabled() ? arrowColor : disabledArrowColor;
 	}
+
+	private boolean isUnderlineSelection() {
+		// not storing value of "MenuItem.selectionType" in class to allow changing at runtime
+		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
+	}
 }

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

@@ -19,6 +19,7 @@ package com.formdev.flatlaf.ui;
 import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.BasicStroke;
 import java.awt.Color;
+import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -26,6 +27,7 @@ import java.awt.Shape;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.geom.Path2D;
+import javax.swing.JComponent;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicArrowButton;
 
@@ -111,6 +113,10 @@ public class FlatArrowButton
 		this.yOffset = yOffset;
 	}
 
+	protected Color deriveHoverBackground( Color hoverBackground ) {
+		return hoverBackground;
+	}
+
 	@Override
 	public Dimension getPreferredSize() {
 		return scale( super.getPreferredSize() );
@@ -132,31 +138,44 @@ public class FlatArrowButton
 
 		// paint hover background
 		if( enabled && isHover() && hoverBackground != null ) {
-			g.setColor( hoverBackground );
+			g.setColor( deriveHoverBackground( hoverBackground ) );
 			g.fillRect( 0, 0, width, height );
 		}
 
 		int direction = getDirection();
 		boolean vert = (direction == NORTH || direction == SOUTH);
 
+		// compute width/height
 		int w = scale( arrowWidth + (chevron ? 0 : 1) );
 		int h = scale( (arrowWidth / 2) + (chevron ? 0 : 1) );
+
+		// rotate width/height
 		int rw = vert ? w : h;
 		int rh = vert ? h : w;
+
+		// chevron lines end 1px outside of width/height
+		if( chevron ) {
+			// add 1px to width/height for position calculation only
+			rw++;
+			rh++;
+		}
+
 		int x = Math.round( (width - rw) / 2f + scale( (float) xOffset ) );
 		int y = Math.round( (height - rh) / 2f + scale( (float) yOffset ) );
 
-		// optimization for small chevron arrows (e.g. OneTouchButtons in SplitPane)
-		if( x + rw >= width && x > 0 )
-			x--;
-		if( y + rh >= height && y > 0 )
-			y--;
+		// move arrow for round borders
+		Container parent = getParent();
+		if( vert && parent instanceof JComponent && FlatUIUtils.hasRoundBorder( (JComponent) parent ) )
+			x -= scale( parent.getComponentOrientation().isLeftToRight() ? 1 : -1 );
 
 		// paint arrow
 		g.setColor( enabled
 			? (isHover() && hoverForeground != null ? hoverForeground : foreground)
 			: disabledForeground );
 		g.translate( x, y );
+/*debug
+		debugPaint( g2, vert, rw, rh );
+debug*/
 		Shape arrowShape = createArrowShape( direction, chevron, w, h );
 		if( chevron ) {
 			g2.setStroke( new BasicStroke( scale( 1f ) ) );
@@ -177,4 +196,22 @@ public class FlatArrowButton
 			default:	return new Path2D.Float();
 		}
 	}
+
+/*debug
+	private void debugPaint( Graphics g, boolean vert, int w, int h ) {
+		Color oldColor = g.getColor();
+		g.setColor( Color.red );
+		g.drawRect( 0, 0, w - 1, h - 1 );
+
+		int xy1 = -2;
+		int xy2 = h + 1;
+		for( int i = 0; i < 20; i++ ) {
+			g.drawRect( vert ? 0 : xy1, vert ? xy1 : 0, 0, 0 );
+			g.drawRect( vert ? 0 : xy2, vert ? xy2 : 0, 0, 0 );
+			xy1 -= 2;
+			xy2 += 2;
+		}
+		g.setColor( oldColor );
+	}
+debug*/
 }

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

@@ -36,6 +36,8 @@ import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.basic.BasicBorders;
 import javax.swing.text.JTextComponent;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.util.DerivedColor;
 
 /**
  * Border for various components (e.g. {@link javax.swing.JTextField}).
@@ -54,6 +56,12 @@ import javax.swing.text.JTextComponent;
  * @uiDefault Component.disabledBorderColor	Color
  * @uiDefault Component.focusedBorderColor	Color
  *
+ * @uiDefault Component.error.borderColor			Color
+ * @uiDefault Component.error.focusedBorderColor	Color
+ * @uiDefault Component.warning.borderColor			Color
+ * @uiDefault Component.warning.focusedBorderColor	Color
+ * @uiDefault Component.custom.borderColor			Color
+ *
  * @author Karl Tauber
  */
 public class FlatBorder
@@ -61,11 +69,18 @@ public class FlatBorder
 {
 	protected final int focusWidth = UIManager.getInt( "Component.focusWidth" );
 	protected final float innerFocusWidth = FlatUIUtils.getUIFloat( "Component.innerFocusWidth", 0 );
+	protected final float innerOutlineWidth = FlatUIUtils.getUIFloat( "Component.innerOutlineWidth", 0 );
 	protected final Color focusColor = UIManager.getColor( "Component.focusColor" );
 	protected final Color borderColor = UIManager.getColor( "Component.borderColor" );
 	protected final Color disabledBorderColor = UIManager.getColor( "Component.disabledBorderColor" );
 	protected final Color focusedBorderColor = UIManager.getColor( "Component.focusedBorderColor" );
 
+	protected final Color errorBorderColor = UIManager.getColor( "Component.error.borderColor" );
+	protected final Color errorFocusedBorderColor = UIManager.getColor( "Component.error.focusedBorderColor" );
+	protected final Color warningBorderColor = UIManager.getColor( "Component.warning.borderColor" );
+	protected final Color warningFocusedBorderColor = UIManager.getColor( "Component.warning.focusedBorderColor" );
+	protected final Color customBorderColor = UIManager.getColor( "Component.custom.borderColor" );
+
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		Graphics2D g2 = (Graphics2D) g.create();
@@ -73,25 +88,53 @@ public class FlatBorder
 			FlatUIUtils.setRenderingHints( g2 );
 
 			boolean isCellEditor = isTableCellEditor( c );
-			float focusWidth = isCellEditor ? 0 : getFocusWidth( c );
-			float borderWidth = getBorderWidth( c );
-			float arc = isCellEditor ? 0 : getArc( c );
+			float focusWidth = isCellEditor ? 0 : scale( (float) getFocusWidth( c ) );
+			float borderWidth = scale( (float) getBorderWidth( c ) );
+			float arc = isCellEditor ? 0 : scale( (float) getArc( c ) );
+			Color outlineColor = getOutlineColor( c );
 
-			if( isFocused( c ) ) {
-				float innerFocusWidth = !(c instanceof JScrollPane) ? this.innerFocusWidth : 0;
+			if( outlineColor != null || isFocused( c ) ) {
+				float innerFocusWidth = !(c instanceof JScrollPane)
+					? (outlineColor != null ? innerOutlineWidth : this.innerFocusWidth)
+					: 0;
 
-				g2.setColor( getFocusColor( c ) );
+				g2.setColor( (outlineColor != null) ? outlineColor : getFocusColor( c ) );
 				FlatUIUtils.paintComponentOuterBorder( g2, x, y, width, height, focusWidth,
-					getLineWidth( c ) + scale( innerFocusWidth ), arc );
+					scale( (float) getLineWidth( c ) ) + scale( innerFocusWidth ), arc );
 			}
 
-			g2.setPaint( getBorderColor( c ) );
+			g2.setPaint( (outlineColor != null) ? outlineColor : getBorderColor( c ) );
 			FlatUIUtils.paintComponentBorder( g2, x, y, width, height, focusWidth, borderWidth, arc );
 		} finally {
 			g2.dispose();
 		}
 	}
 
+	protected Color getOutlineColor( Component c ) {
+		if( !(c instanceof JComponent) )
+			return null;
+
+		Object outline = ((JComponent)c).getClientProperty( FlatClientProperties.OUTLINE );
+		if( outline instanceof String ) {
+			switch( (String) outline ) {
+				case FlatClientProperties.OUTLINE_ERROR:
+					return isFocused( c ) ? errorFocusedBorderColor : errorBorderColor;
+
+				case FlatClientProperties.OUTLINE_WARNING:
+					return isFocused( c ) ? warningFocusedBorderColor : warningBorderColor;
+			}
+		} else if( outline instanceof Color ) {
+			Color color = (Color) outline;
+			// use color functions to compute color for unfocused state
+			if( !isFocused( c ) && customBorderColor instanceof DerivedColor )
+				color = ((DerivedColor)customBorderColor).derive( color );
+			return color;
+		} else if( outline instanceof Color[] && ((Color[])outline).length >= 2 )
+			return ((Color[])outline)[isFocused( c ) ? 0 : 1];
+
+		return null;
+	}
+
 	protected Color getFocusColor( Component c ) {
 		return focusColor;
 	}
@@ -135,6 +178,9 @@ public class FlatBorder
 			Component editorComponent = ((JComboBox<?>)c).getEditor().getEditorComponent();
 			return (editorComponent != null) ? FlatUIUtils.isPermanentFocusOwner( editorComponent ) : false;
 		} else if( c instanceof JSpinner ) {
+			if( FlatUIUtils.isPermanentFocusOwner( c ) )
+				return true;
+
 			JComponent editor = ((JSpinner)c).getEditor();
 			if( editor instanceof JSpinner.DefaultEditor ) {
 				JTextField textField = ((JSpinner.DefaultEditor)editor).getTextField();
@@ -153,7 +199,8 @@ public class FlatBorder
 	@Override
 	public Insets getBorderInsets( Component c, Insets insets ) {
 		boolean isCellEditor = isTableCellEditor( c );
-		float ow = (isCellEditor ? 0 : getFocusWidth( c )) + getLineWidth( c );
+		float focusWidth = isCellEditor ? 0 : scale( (float) getFocusWidth( c ) );
+		float ow = focusWidth + scale( (float) getLineWidth( c ) );
 
 		insets = super.getBorderInsets( c, insets );
 		insets.top = Math.round( scale( (float) insets.top ) + ow );
@@ -163,19 +210,33 @@ public class FlatBorder
 		return insets;
 	}
 
-	protected float getFocusWidth( Component c ) {
-		return scale( (float) focusWidth );
+	/**
+	 * Returns the (unscaled) thickness of the outer focus border.
+	 */
+	protected int getFocusWidth( Component c ) {
+		return focusWidth;
 	}
 
-	protected float getLineWidth( Component c ) {
-		return scale( 1f );
+	/**
+	 * Returns the (unscaled) line thickness used to compute the border insets.
+	 * This may be different to {@link #getBorderWidth}.
+	 */
+	protected int getLineWidth( Component c ) {
+		return 1;
 	}
 
-	protected float getBorderWidth( Component c ) {
+	/**
+	 * Returns the (unscaled) line thickness used to paint the border.
+	 * This may be different to {@link #getLineWidth}.
+	 */
+	protected int getBorderWidth( Component c ) {
 		return getLineWidth( c );
 	}
 
-	protected float getArc( Component c ) {
+	/**
+	 * Returns the (unscaled) arc diameter of the border.
+	 */
+	protected int getArc( Component c ) {
 		return 0;
 	}
 }

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

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.GradientPaint;
@@ -115,8 +114,8 @@ public class FlatButtonBorder
 		} else {
 			insets = super.getBorderInsets( c, insets );
 
-			// use smaller left and right insets for icon-only buttons (so that they are square)
-			if( FlatButtonUI.isIconOnlyButton( c ) && ((AbstractButton)c).getMargin() instanceof UIResource )
+			// use smaller left and right insets for icon-only or single-character buttons (so that they are square)
+			if( FlatButtonUI.isIconOnlyOrSingleCharacterButton( c ) && ((AbstractButton)c).getMargin() instanceof UIResource )
 				insets.left = insets.right = Math.min( insets.top, insets.bottom );
 		}
 
@@ -124,17 +123,21 @@ public class FlatButtonBorder
 	}
 
 	@Override
-	protected float getFocusWidth( Component c ) {
-		return FlatToggleButtonUI.isTabButton( c ) ? 0 : super.getFocusWidth(c );
+	protected int getFocusWidth( Component c ) {
+		return FlatToggleButtonUI.isTabButton( c ) ? 0 : super.getFocusWidth( c );
 	}
 
 	@Override
-	protected float getBorderWidth( Component c ) {
-		return FlatButtonUI.isDefaultButton( c ) ? scale( (float) defaultBorderWidth ) : super.getBorderWidth( c );
+	protected int getBorderWidth( Component c ) {
+		return FlatButtonUI.isDefaultButton( c ) ? defaultBorderWidth : super.getBorderWidth( c );
 	}
 
 	@Override
-	protected float getArc( Component c ) {
-		return FlatButtonUI.isSquareButton( c ) ? 0 : scale( (float) arc );
+	protected int getArc( Component c ) {
+		switch( FlatButtonUI.getButtonType( c ) ) {
+			case FlatButtonUI.TYPE_SQUARE: return 0;
+			case FlatButtonUI.TYPE_ROUND_RECT: return Short.MAX_VALUE;
+			default: return arc;
+		}
 	}
 }

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

@@ -39,7 +39,6 @@ import javax.swing.JToggleButton;
 import javax.swing.JToolBar;
 import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
-import javax.swing.border.Border;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicButtonListener;
@@ -61,8 +60,6 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * <!-- FlatButtonUI -->
  *
- * @uiDefault Component.focusWidth				int
- * @uiDefault Button.arc						int
  * @uiDefault Button.minimumWidth				int
  * @uiDefault Button.iconTextGap				int
  * @uiDefault Button.startBackground			Color	optional; if set, a gradient paint is used and Button.background is ignored
@@ -92,8 +89,6 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatButtonUI
 	extends BasicButtonUI
 {
-	protected int focusWidth;
-	protected int arc;
 	protected int minimumWidth;
 	protected int iconTextGap;
 
@@ -139,8 +134,6 @@ public class FlatButtonUI
 		if( !defaults_initialized ) {
 			String prefix = getPropertyPrefix();
 
-			focusWidth = UIManager.getInt( "Component.focusWidth" );
-			arc = UIManager.getInt( "Button.arc" );
 			minimumWidth = UIManager.getInt( prefix + "minimumWidth" );
 			iconTextGap = FlatUIUtils.getUIInt( prefix + "iconTextGap", 4 );
 
@@ -187,7 +180,7 @@ public class FlatButtonUI
 		LookAndFeel.installProperty( b, "opaque", false );
 		LookAndFeel.installProperty( b, "iconTextGap", scale( iconTextGap ) );
 
-		MigLayoutVisualPadding.install( b, getFocusWidth( b ) );
+		MigLayoutVisualPadding.install( b );
 	}
 
 	@Override
@@ -215,6 +208,11 @@ public class FlatButtonUI
 			case MINIMUM_HEIGHT:
 				b.revalidate();
 				break;
+
+			case BUTTON_TYPE:
+				b.revalidate();
+				b.repaint();
+				break;
 		}
 	}
 
@@ -226,7 +224,11 @@ public class FlatButtonUI
 		return c instanceof JButton && ((JButton)c).isDefaultButton();
 	}
 
-	static boolean isIconOnlyButton( Component c ) {
+	/**
+	 * Returns true if the button has an icon but no text,
+	 * or it it does not have an icon and the text is either "..." or one character.
+	 */
+	static boolean isIconOnlyOrSingleCharacterButton( Component c ) {
 		if( !(c instanceof JButton) && !(c instanceof JToggleButton) )
 			return false;
 
@@ -236,8 +238,15 @@ public class FlatButtonUI
 			(icon == null && text != null && ("...".equals( text ) || text.length() == 1));
 	}
 
-	static boolean isSquareButton( Component c ) {
-		return c instanceof AbstractButton && clientPropertyEquals( (AbstractButton) c, BUTTON_TYPE, BUTTON_TYPE_SQUARE );
+	// same indices as in parameters to clientPropertyChoice()
+	static final int TYPE_OTHER = -1;
+	static final int TYPE_SQUARE = 0;
+	static final int TYPE_ROUND_RECT = 1;
+
+	static int getButtonType( Component c ) {
+		return (c instanceof AbstractButton)
+			? clientPropertyChoice( (AbstractButton) c, BUTTON_TYPE, BUTTON_TYPE_SQUARE, BUTTON_TYPE_ROUND_RECT )
+			: TYPE_OTHER;
 	}
 
 	static boolean isHelpButton( Component c ) {
@@ -245,7 +254,8 @@ public class FlatButtonUI
 	}
 
 	static boolean isToolBarButton( Component c ) {
-		return c.getParent() instanceof JToolBar;
+		return c.getParent() instanceof JToolBar ||
+			(c instanceof AbstractButton && clientPropertyEquals( (AbstractButton) c, BUTTON_TYPE, BUTTON_TYPE_TOOLBAR_BUTTON ));
 	}
 
 	@Override
@@ -272,11 +282,10 @@ public class FlatButtonUI
 			try {
 				FlatUIUtils.setRenderingHints( g2 );
 
-				Border border = c.getBorder();
 				boolean isToolBarButton = isToolBarButton( c );
-				float focusWidth = (border instanceof FlatBorder && !isToolBarButton) ? scale( (float) getFocusWidth( c ) ) : 0;
-				float arc = ((border instanceof FlatButtonBorder && !isSquareButton( c )) || isToolBarButton)
-					? scale( (float) this.arc ) : 0;
+				float focusWidth = isToolBarButton ? 0 : FlatUIUtils.getBorderFocusWidth( c );
+				float arc = FlatUIUtils.getBorderArc( c );
+
 				boolean def = isDefaultButton( c );
 
 				int x = 0;
@@ -308,7 +317,7 @@ public class FlatButtonUI
 				if( background == startBg && endBg != null && !startBg.equals( endBg ) )
 					g2.setPaint( new GradientPaint( 0, 0, startBg, 0, height, endBg ) );
 				else
-					FlatUIUtils.setColor( g2, background, def ? defaultBackground : c.getBackground() );
+					g2.setColor( FlatUIUtils.deriveColor( background, def ? defaultBackground : c.getBackground() ) );
 
 				FlatUIUtils.paintComponentBackground( g2, x, y, width, height, focusWidth, arc );
 			} finally {
@@ -401,23 +410,21 @@ public class FlatButtonUI
 			return new Dimension( helpButtonIcon.getIconWidth(), helpButtonIcon.getIconHeight() );
 
 		Dimension prefSize = super.getPreferredSize( c );
-		if ( prefSize == null )
+		if( prefSize == null )
 			return null;
 
-		// make button square if it is a icon-only button
-		// or apply minimum width, if not in toolbar and not a icon-only button
-		if( isIconOnlyButton( c ) )
-			prefSize.width = Math.max( prefSize.width, prefSize.height );
-		else if( !isToolBarButton( c ) && c.getBorder() instanceof FlatButtonBorder ) {
-			int focusWidth = getFocusWidth( c );
-			prefSize.width = Math.max( prefSize.width, scale( FlatUIUtils.minimumWidth( c, minimumWidth ) + (focusWidth * 2) ) );
-			prefSize.height = Math.max( prefSize.height, scale( FlatUIUtils.minimumHeight( c, 0 ) + (focusWidth * 2) ) );
+		// make button square if it is a single-character button
+		// or apply minimum width, if not in toolbar and not a icon-only or single-character button
+		if( isIconOnlyOrSingleCharacterButton( c ) ) {
+			// make only single-character buttons square to allow non-square icon-only buttons
+			if( ((AbstractButton)c).getIcon() == null )
+				prefSize.width = Math.max( prefSize.width, prefSize.height );
+		} else if( !isToolBarButton( c ) && c.getBorder() instanceof FlatButtonBorder ) {
+			float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
+			prefSize.width = Math.max( prefSize.width, scale( FlatUIUtils.minimumWidth( c, minimumWidth ) ) + Math.round( focusWidth * 2 ) );
+			prefSize.height = Math.max( prefSize.height, scale( FlatUIUtils.minimumHeight( c, 0 ) ) + Math.round( focusWidth * 2 ) );
 		}
 
 		return prefSize;
 	}
-
-	protected int getFocusWidth( JComponent c ) {
-		return focusWidth;
-	}
 }

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

@@ -16,12 +16,11 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
+import java.awt.Dimension;
 import java.awt.Graphics;
-import java.awt.Rectangle;
-import java.beans.PropertyChangeListener;
+import javax.swing.Icon;
 import javax.swing.JComponent;
-import javax.swing.JMenuItem;
+import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicCheckBoxMenuItemUI;
 
@@ -30,29 +29,34 @@ import javax.swing.plaf.basic.BasicCheckBoxMenuItemUI;
  *
  * <!-- BasicCheckBoxMenuItemUI -->
  *
- * @uiDefault CheckBoxMenuItem.font								Font
- * @uiDefault CheckBoxMenuItem.background						Color
- * @uiDefault CheckBoxMenuItem.foreground						Color
- * @uiDefault CheckBoxMenuItem.disabledForeground				Color
- * @uiDefault CheckBoxMenuItem.selectionBackground				Color
- * @uiDefault CheckBoxMenuItem.selectionForeground				Color
- * @uiDefault CheckBoxMenuItem.acceleratorForeground			Color
- * @uiDefault CheckBoxMenuItem.acceleratorSelectionForeground	Color
- * @uiDefault MenuItem.acceleratorFont							Font		defaults to MenuItem.font
- * @uiDefault MenuItem.acceleratorDelimiter						String
- * @uiDefault CheckBoxMenuItem.border							Border
- * @uiDefault CheckBoxMenuItem.borderPainted					boolean
- * @uiDefault CheckBoxMenuItem.margin							Insets
- * @uiDefault CheckBoxMenuItem.arrowIcon						Icon
- * @uiDefault CheckBoxMenuItem.checkIcon						Icon
- * @uiDefault CheckBoxMenuItem.opaque							boolean
- * @uiDefault CheckBoxMenuItem.evenHeight						boolean
+ * @uiDefault CheckBoxMenuItem.font									Font
+ * @uiDefault CheckBoxMenuItem.background							Color
+ * @uiDefault CheckBoxMenuItem.foreground							Color
+ * @uiDefault CheckBoxMenuItem.disabledForeground					Color
+ * @uiDefault CheckBoxMenuItem.selectionBackground					Color
+ * @uiDefault CheckBoxMenuItem.selectionForeground					Color
+ * @uiDefault CheckBoxMenuItem.acceleratorForeground				Color
+ * @uiDefault CheckBoxMenuItem.acceleratorSelectionForeground		Color
+ * @uiDefault MenuItem.acceleratorFont								Font		defaults to MenuItem.font
+ * @uiDefault MenuItem.acceleratorDelimiter							String
+ * @uiDefault CheckBoxMenuItem.border								Border
+ * @uiDefault CheckBoxMenuItem.borderPainted						boolean
+ * @uiDefault CheckBoxMenuItem.margin								Insets
+ * @uiDefault CheckBoxMenuItem.arrowIcon							Icon
+ * @uiDefault CheckBoxMenuItem.checkIcon							Icon
+ * @uiDefault CheckBoxMenuItem.opaque								boolean
+ *
+ * <!-- FlatCheckBoxMenuItemUI -->
+ *
+ * @uiDefault MenuItem.iconTextGap									int
  *
  * @author Karl Tauber
  */
 public class FlatCheckBoxMenuItemUI
 	extends BasicCheckBoxMenuItemUI
 {
+	private FlatMenuItemRenderer renderer;
+
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatCheckBoxMenuItemUI();
 	}
@@ -61,25 +65,30 @@ public class FlatCheckBoxMenuItemUI
 	protected void installDefaults() {
 		super.installDefaults();
 
-		// scale
-		defaultTextIconGap = scale( defaultTextIconGap );
-	}
+		LookAndFeel.installProperty( menuItem, "iconTextGap", FlatUIUtils.getUIInt( "MenuItem.iconTextGap", 4 ) );
 
-	/**
-	 * Scale defaultTextIconGap again if iconTextGap property has changed.
-	 */
-	@Override
-	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		PropertyChangeListener superListener = super.createPropertyChangeListener( c );
-		return e -> {
-			superListener.propertyChange( e );
-			if( e.getPropertyName() == "iconTextGap" )
-				defaultTextIconGap = scale( defaultTextIconGap );
-		};
+		renderer = createRenderer();
 	}
 
 	@Override
-	protected void paintText( Graphics g, JMenuItem menuItem, Rectangle textRect, String text ) {
-		FlatMenuItemUI.paintText( g, menuItem, textRect, text, disabledForeground, selectionForeground );
+	protected void uninstallDefaults() {
+		super.uninstallDefaults();
+
+		renderer = null;
+	}
+
+	protected FlatMenuItemRenderer createRenderer() {
+		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
+	}
+
+	@Override
+	protected Dimension getPreferredMenuItemSize( JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap ) {
+		return renderer.getPreferredMenuItemSize();
+	}
+
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		renderer.paintMenuItem( g, selectionBackground, selectionForeground, disabledForeground,
+			acceleratorForeground, acceleratorSelectionForeground );
 	}
 }

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

@@ -39,6 +39,7 @@ import java.beans.PropertyChangeListener;
 import java.lang.ref.WeakReference;
 import javax.swing.AbstractAction;
 import javax.swing.BorderFactory;
+import javax.swing.ComboBoxEditor;
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.InputMap;
 import javax.swing.JButton;
@@ -46,6 +47,7 @@ import javax.swing.JComboBox;
 import javax.swing.JComponent;
 import javax.swing.JList;
 import javax.swing.JPanel;
+import javax.swing.JTextField;
 import javax.swing.KeyStroke;
 import javax.swing.ListCellRenderer;
 import javax.swing.LookAndFeel;
@@ -76,8 +78,8 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * <!-- FlatComboBoxUI -->
  *
- * @uiDefault Component.focusWidth				int
- * @uiDefault Component.arc						int
+ * @uiDefault ComboBox.minimumWidth				int
+ * @uiDefault ComboBox.editorColumns			int
  * @uiDefault Component.arrowType				String	triangle (default) or chevron
  * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault Component.borderColor				Color
@@ -96,8 +98,8 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatComboBoxUI
 	extends BasicComboBoxUI
 {
-	protected int focusWidth;
-	protected int arc;
+	protected int minimumWidth;
+	protected int editorColumns;
 	protected String arrowType;
 	protected boolean isIntelliJTheme;
 	protected Color borderColor;
@@ -150,8 +152,8 @@ public class FlatComboBoxUI
 
 		LookAndFeel.installProperty( comboBox, "opaque", false );
 
-		focusWidth = UIManager.getInt( "Component.focusWidth" );
-		arc = UIManager.getInt( "Component.arc" );
+		minimumWidth = UIManager.getInt( "ComboBox.minimumWidth" );
+		editorColumns = UIManager.getInt( "ComboBox.editorColumns" );
 		arrowType = UIManager.getString( "Component.arrowType" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		borderColor = UIManager.getColor( "Component.borderColor" );
@@ -170,7 +172,7 @@ public class FlatComboBoxUI
 		// scale
 		padding = UIScale.scale( padding );
 
-		MigLayoutVisualPadding.install( comboBox, focusWidth );
+		MigLayoutVisualPadding.install( comboBox );
 	}
 
 	@Override
@@ -249,6 +251,10 @@ public class FlatComboBoxUI
 					editor.applyComponentOrientation( o );
 				} else if( editor != null && FlatClientProperties.PLACEHOLDER_TEXT.equals( propertyName ) )
 					editor.repaint();
+				else if( FlatClientProperties.COMPONENT_ROUND_RECT.equals( propertyName ) )
+					comboBox.repaint();
+				else if( FlatClientProperties.MINIMUM_WIDTH.equals( propertyName ) )
+					comboBox.revalidate();
 			}
 		};
 	}
@@ -258,18 +264,30 @@ public class FlatComboBoxUI
 		return new FlatComboPopup( comboBox );
 	}
 
+	@Override
+	protected ComboBoxEditor createEditor() {
+		ComboBoxEditor comboBoxEditor = super.createEditor();
+
+		Component editor = comboBoxEditor.getEditorComponent();
+		if( editor instanceof JTextField ) {
+			JTextField textField = (JTextField) editor;
+			textField.setColumns( editorColumns );
+
+			// assign a non-null and non-javax.swing.plaf.UIResource border to the text field,
+			// otherwise it is replaced with default text field border when switching LaF
+			// because javax.swing.plaf.basic.BasicComboBoxEditor.BorderlessTextField.setBorder()
+			// uses "border instanceof javax.swing.plaf.basic.BasicComboBoxEditor.UIResource"
+			// instead of "border instanceof javax.swing.plaf.UIResource"
+			textField.setBorder( BorderFactory.createEmptyBorder() );
+		}
+
+		return comboBoxEditor;
+	}
+
 	@Override
 	protected void configureEditor() {
 		super.configureEditor();
 
-		// assign a non-javax.swing.plaf.UIResource border to the text field,
-		// otherwise it is replaced with default text field border when switching LaF
-		// because javax.swing.plaf.basic.BasicComboBoxEditor.BorderlessTextField.setBorder()
-		// uses "border instanceof javax.swing.plaf.basic.BasicComboBoxEditor.UIResource"
-		// instead of "border instanceof javax.swing.plaf.UIResource"
-		if( editor instanceof JTextComponent )
-			((JTextComponent)editor).setBorder( BorderFactory.createEmptyBorder() );
-
 		// explicitly make non-opaque
 		if( editor instanceof JComponent )
 			((JComponent)editor).setOpaque( false );
@@ -318,8 +336,11 @@ public class FlatComboBoxUI
 
 	@Override
 	public void update( Graphics g, JComponent c ) {
+		float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
+		float arc = FlatUIUtils.getBorderArc( c );
+
 		// fill background if opaque to avoid garbage if user sets opaque to true
-		if( c.isOpaque() && (focusWidth > 0 || arc != 0) )
+		if( c.isOpaque() && (focusWidth > 0 || arc > 0) )
 			FlatUIUtils.paintParentBackground( g, c );
 
 		Graphics2D g2 = (Graphics2D) g;
@@ -327,8 +348,6 @@ public class FlatComboBoxUI
 
 		int width = c.getWidth();
 		int height = c.getHeight();
-		float focusWidth = (c.getBorder() instanceof FlatBorder) ? scale( (float) this.focusWidth ) : 0;
-		float arc = (c.getBorder() instanceof FlatRoundBorder) ? scale( (float) this.arc ) : 0;
 		int arrowX = arrowButton.getX();
 		int arrowWidth = arrowButton.getWidth();
 		boolean enabled = comboBox.isEnabled();
@@ -394,14 +413,20 @@ public class FlatComboBoxUI
 
 	@Override
 	public void paintCurrentValueBackground( Graphics g, Rectangle bounds, boolean hasFocus ) {
-		g.setColor( comboBox.isEnabled() ? comboBox.getBackground() : getDisabledBackground( comboBox ) );
-		g.fillRect( bounds.x, bounds.y, bounds.width, bounds.height );
+		// not necessary because already painted in update()
 	}
 
 	private Color getDisabledBackground( JComponent c ) {
 		return isIntelliJTheme ? FlatUIUtils.getParentBackground( c ) : disabledBackground;
 	}
 
+	@Override
+	public Dimension getMinimumSize( JComponent c ) {
+		Dimension minimumSize = super.getMinimumSize( c );
+		minimumSize.width = Math.max( minimumSize.width, scale( FlatUIUtils.minimumWidth( c, minimumWidth ) ) );
+		return minimumSize;
+	}
+
 	@Override
 	protected Dimension getDefaultSize() {
 		@SuppressWarnings( "unchecked" )
@@ -422,6 +447,18 @@ public class FlatComboBoxUI
 
 		Dimension displaySize = super.getDisplaySize();
 
+		// recalculate width without hardcoded 100 under special conditions
+		if( displaySize.width == 100 + padding.left + padding.right &&
+			comboBox.isEditable() &&
+			comboBox.getItemCount() == 0 &&
+			comboBox.getPrototypeDisplayValue() == null )
+		{
+			int width = getDefaultSize().width;
+			width = Math.max( width, editor.getPreferredSize().width );
+			width += padding.left + padding.right;
+			displaySize = new Dimension( width, displaySize.height );
+		}
+
 		uninstallCellPaddingBorder( renderer );
 		return displaySize;
 	}

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

@@ -0,0 +1,223 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.Insets;
+import java.awt.RadialGradientPaint;
+import java.awt.image.BufferedImage;
+import com.formdev.flatlaf.util.HiDPIUtils;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * Paints a drop shadow border around the component.
+ * Supports 1-sided, 2-side, 3-sided or 4-sided drop shadows.
+ * <p>
+ * The shadow insets allow specifying drop shadow thickness for each side.
+ * A zero or negative value hides the drop shadow on that side.
+ * A negative value can be used to indent the drop shadow on corners.
+ * E.g. -4 on left indents drop shadow at top-left and bottom-left corners by 4 pixels.
+ *
+ * @author Karl Tauber
+ */
+public class FlatDropShadowBorder
+	extends FlatEmptyBorder
+{
+	private final Color shadowColor;
+	private final Insets shadowInsets;
+	private final float shadowOpacity;
+
+	private final int shadowSize;
+	private Image shadowImage;
+	private Color lastShadowColor;
+	private double lastSystemScaleFactor;
+	private float lastUserScaleFactor;
+
+	public FlatDropShadowBorder() {
+		this( null );
+	}
+
+	public FlatDropShadowBorder( Color shadowColor ) {
+		this( shadowColor, 4, 0.5f );
+	}
+
+	public FlatDropShadowBorder( Color shadowColor, int shadowSize, float shadowOpacity ) {
+		this( shadowColor, new Insets( -shadowSize, -shadowSize, shadowSize, shadowSize ), shadowOpacity );
+	}
+
+	public FlatDropShadowBorder( Color shadowColor, Insets shadowInsets, float shadowOpacity ) {
+		super( Math.max( shadowInsets.top, 0 ), Math.max( shadowInsets.left, 0 ),
+			Math.max( shadowInsets.bottom, 0 ), Math.max( shadowInsets.right, 0 ) );
+		this.shadowColor = shadowColor;
+		this.shadowInsets = shadowInsets;
+		this.shadowOpacity = shadowOpacity;
+
+		shadowSize = Math.max(
+			Math.max( shadowInsets.left, shadowInsets.right ),
+			Math.max( shadowInsets.top, shadowInsets.bottom ) );
+	}
+
+	@Override
+	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+		if( shadowSize <= 0 )
+			return;
+
+		HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, width, height, this::paintImpl );
+	}
+
+	private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+		Color shadowColor = (this.shadowColor != null) ? this.shadowColor : g.getColor();
+		int shadowSize = scale( this.shadowSize, scaleFactor );
+
+		// create and cache shadow image
+		float userScaleFactor = UIScale.getUserScaleFactor();
+		if( shadowImage == null ||
+			!shadowColor.equals( lastShadowColor ) ||
+			lastSystemScaleFactor != scaleFactor ||
+			lastUserScaleFactor != userScaleFactor )
+		{
+			shadowImage = createShadowImage( shadowColor, shadowSize, shadowOpacity,
+				(float) (scaleFactor * userScaleFactor) );
+			lastShadowColor = shadowColor;
+			lastSystemScaleFactor = scaleFactor;
+			lastUserScaleFactor = userScaleFactor;
+		}
+
+/*debug
+		int m = shadowImage.getWidth( null );
+		Color oldColor = g.getColor();
+		g.setColor( Color.lightGray );
+		g.drawRect( x - m - 1, y - m - 1, m + 1, m + 1 );
+		g.setColor( Color.white );
+		g.fillRect( x - m, y - m, m, m );
+		g.drawImage( shadowImage, x - m, y - m, null );
+		g.setColor( oldColor );
+debug*/
+
+		int left = scale( shadowInsets.left, scaleFactor );
+		int right = scale( shadowInsets.right, scaleFactor );
+		int top = scale( shadowInsets.top, scaleFactor );
+		int bottom = scale( shadowInsets.bottom, scaleFactor );
+
+		// shadow outer coordinates
+		int x1o = x - Math.min( left, 0 );
+		int y1o = y - Math.min( top, 0 );
+		int x2o = x + width + Math.min( right, 0 );
+		int y2o = y + height + Math.min( bottom, 0 );
+
+		// shadow inner coordinates
+		int x1i = x1o + shadowSize;
+		int y1i = y1o + shadowSize;
+		int x2i = x2o - shadowSize;
+		int y2i = y2o - shadowSize;
+
+		int wh = (shadowSize * 2) - 1;
+		int center = shadowSize - 1;
+
+		// left-top edge
+		if( left > 0 || top > 0 ) {
+			g.drawImage( shadowImage, x1o, y1o, x1i, y1i,
+				0, 0, center, center, null );
+		}
+
+		// top shadow
+		if( top > 0 ) {
+			g.drawImage( shadowImage, x1i, y1o, x2i, y1i,
+				center, 0, center + 1, center, null );
+		}
+
+		// right-top edge
+		if( right > 0 || top > 0 ) {
+			g.drawImage( shadowImage, x2i, y1o, x2o, y1i,
+				center, 0, wh, center, null );
+		}
+
+		// left shadow
+		if( left > 0 ) {
+			g.drawImage( shadowImage, x1o, y1i, x1i, y2i,
+				0, center, center, center + 1, null );
+		}
+
+		// right shadow
+		if( right > 0 ) {
+			g.drawImage( shadowImage, x2i, y1i, x2o, y2i,
+				center, center, wh, center + 1, null );
+		}
+
+		// left-bottom edge
+		if( left > 0 || bottom > 0 ) {
+			g.drawImage( shadowImage, x1o, y2i, x1i, y2o,
+				0, center, center, wh, null );
+		}
+
+		// bottom shadow
+		if( bottom > 0 ) {
+			g.drawImage( shadowImage, x1i, y2i, x2i, y2o,
+				center, center, center + 1, wh, null );
+		}
+
+		// right-bottom edge
+		if( right > 0 || bottom > 0 ) {
+			g.drawImage( shadowImage, x2i, y2i, x2o, y2o,
+				center, center, wh, wh, null );
+		}
+	}
+
+	private int scale( int value, double scaleFactor ) {
+		return (int) Math.ceil( UIScale.scale( value ) * scaleFactor );
+	}
+
+	private static BufferedImage createShadowImage( Color shadowColor, int shadowSize,
+		float shadowOpacity, float scaleFactor )
+	{
+		int shadowRGB = shadowColor.getRGB() & 0xffffff;
+		int shadowAlpha = (int) (255 * shadowOpacity);
+		Color startColor = new Color( shadowRGB | ((shadowAlpha & 0xff) << 24), true );
+		Color midColor = new Color( shadowRGB | (((shadowAlpha / 2) & 0xff) << 24), true );
+		Color endColor = new Color( shadowRGB, true );
+
+/*debug
+		startColor = Color.red;
+		midColor = Color.green;
+		endColor = Color.blue;
+debug*/
+
+		int wh = (shadowSize * 2) - 1;
+		int center = shadowSize - 1;
+
+		RadialGradientPaint p = new RadialGradientPaint( center, center,
+			shadowSize - (0.75f * scaleFactor),
+			new float[] { 0, 0.35f, 1 },
+			new Color[] { startColor, midColor, endColor } );
+
+		BufferedImage image = new BufferedImage( wh, wh, BufferedImage.TYPE_INT_ARGB );
+
+		Graphics2D g = image.createGraphics();
+		try {
+			g.setPaint( p );
+			g.fillRect( 0, 0, wh, wh );
+		} finally {
+			g.dispose();
+		}
+
+		return image;
+	}
+}

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

@@ -19,6 +19,7 @@ package com.formdev.flatlaf.ui;
 import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.beans.PropertyChangeEvent;
 import javax.swing.JComponent;
 import javax.swing.JEditorPane;
 import javax.swing.UIManager;
@@ -26,6 +27,7 @@ import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicEditorPaneUI;
 import javax.swing.text.JTextComponent;
+import com.formdev.flatlaf.FlatClientProperties;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JEditorPane}.
@@ -83,22 +85,36 @@ public class FlatEditorPaneUI
 		getComponent().putClientProperty( JEditorPane.HONOR_DISPLAY_PROPERTIES, oldHonorDisplayProperties );
 	}
 
+	@Override
+	protected void propertyChange( PropertyChangeEvent e ) {
+		super.propertyChange( e );
+		propertyChange( getComponent(), e );
+	}
+
+	static void propertyChange( JTextComponent c, PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case FlatClientProperties.MINIMUM_WIDTH:
+				c.revalidate();
+				break;
+		}
+	}
+
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
-		return applyMinimumWidth( super.getPreferredSize( c ) );
+		return applyMinimumWidth( c, super.getPreferredSize( c ), minimumWidth );
 	}
 
 	@Override
 	public Dimension getMinimumSize( JComponent c ) {
-		return applyMinimumWidth( super.getMinimumSize( c ) );
+		return applyMinimumWidth( c, super.getMinimumSize( c ), minimumWidth );
 	}
 
-	private Dimension applyMinimumWidth( Dimension size ) {
+	static Dimension applyMinimumWidth( JComponent c, Dimension size, int minimumWidth ) {
 		// Assume that text area is in a scroll pane (that displays the border)
 		// and subtract 1px border line width.
 		// Using "(scale( 1 ) * 2)" instead of "scale( 2 )" to deal with rounding
 		// issues. E.g. at scale factor 1.5 the first returns 4, but the second 3.
-		int minimumWidth = FlatUIUtils.minimumWidth( getComponent(), this.minimumWidth );
+		minimumWidth = FlatUIUtils.minimumWidth( c, minimumWidth );
 		size.width = Math.max( size.width, scale( minimumWidth ) - (scale( 1 ) * 2) );
 		return size;
 	}

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

@@ -16,11 +16,27 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.BorderLayout;
+import java.awt.Component;
 import java.awt.Dimension;
+import java.awt.Insets;
+import java.io.File;
+import javax.swing.AbstractButton;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
 import javax.swing.JComponent;
 import javax.swing.JFileChooser;
+import javax.swing.JPanel;
+import javax.swing.JToggleButton;
+import javax.swing.UIManager;
+import javax.swing.filechooser.FileView;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.metal.MetalFileChooserUI;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.util.ScaledImageIcon;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -86,6 +102,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault FileChooser.folderNameLabelText					String
  * @uiDefault FileChooser.filesOfTypeLabelMnemonic				String
  * @uiDefault FileChooser.filesOfTypeLabelText					String
+ *
  * @uiDefault FileChooser.upFolderToolTipText					String
  * @uiDefault FileChooser.upFolderAccessibleName				String
  * @uiDefault FileChooser.homeFolderToolTipText					String
@@ -97,11 +114,27 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault FileChooser.detailsViewButtonToolTipText			String
  * @uiDefault FileChooser.detailsViewButtonAccessibleName		String
  *
+ * <!-- FilePane -->
+ *
+ * @uiDefault FileChooser.fileNameHeaderText					String
+ * @uiDefault FileChooser.fileSizeHeaderText					String
+ * @uiDefault FileChooser.fileTypeHeaderText					String
+ * @uiDefault FileChooser.fileDateHeaderText					String
+ * @uiDefault FileChooser.fileAttrHeaderText					String
+ *
+ * @uiDefault FileChooser.viewMenuLabelText						String
+ * @uiDefault FileChooser.refreshActionLabelText				String
+ * @uiDefault FileChooser.newFolderActionLabelText				String
+ * @uiDefault FileChooser.listViewActionLabelText				String
+ * @uiDefault FileChooser.detailsViewActionLabelText			String
+ *
  * @author Karl Tauber
  */
 public class FlatFileChooserUI
 	extends MetalFileChooserUI
 {
+	private final FlatFileView fileView = new FlatFileView();
+
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatFileChooserUI( (JFileChooser) c );
 	}
@@ -110,6 +143,40 @@ public class FlatFileChooserUI
 		super( filechooser );
 	}
 
+	@Override
+	public void installComponents( JFileChooser fc ) {
+		super.installComponents( fc );
+
+		patchUI( fc );
+	}
+
+	private void patchUI( JFileChooser fc ) {
+		// turn top-right buttons into toolbar buttons
+		Component topPanel = fc.getComponent( 0 );
+		if( (topPanel instanceof JPanel) &&
+			(((JPanel)topPanel).getLayout() instanceof BorderLayout) )
+		{
+			Component topButtonPanel = ((JPanel)topPanel).getComponent( 0 );
+			if( (topButtonPanel instanceof JPanel) &&
+				(((JPanel)topButtonPanel).getLayout() instanceof BoxLayout) )
+			{
+				Insets margin = UIManager.getInsets( "Button.margin" );
+				Component[] comps = ((JPanel)topButtonPanel).getComponents();
+				for( int i = comps.length - 1; i >= 0; i-- ) {
+					Component c = comps[i];
+					if( c instanceof JButton || c instanceof JToggleButton ) {
+						AbstractButton b = (AbstractButton)c;
+						b.putClientProperty( FlatClientProperties.BUTTON_TYPE,
+							FlatClientProperties.BUTTON_TYPE_TOOLBAR_BUTTON );
+						b.setMargin( margin );
+						b.setFocusable( false );
+					} else if( c instanceof Box.Filler )
+						((JPanel)topButtonPanel).remove( i );
+				}
+			}
+		}
+	}
+
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
 		return UIScale.scale( super.getPreferredSize( c ) );
@@ -119,4 +186,50 @@ public class FlatFileChooserUI
 	public Dimension getMinimumSize( JComponent c ) {
 		return UIScale.scale( super.getMinimumSize( c ) );
 	}
+
+	@Override
+	public FileView getFileView( JFileChooser fc ) {
+		return fileView;
+	}
+
+	@Override
+	public void clearIconCache() {
+		fileView.clearIconCache();
+	}
+
+	//---- class FlatFileView -------------------------------------------------
+
+	private class FlatFileView
+		extends BasicFileView
+	{
+		@Override
+		public Icon getIcon( File f ) {
+			// get cached icon
+			Icon icon = getCachedIcon( f );
+			if( icon != null )
+				return icon;
+
+			// get system icon
+			if( f != null ) {
+				icon = getFileChooser().getFileSystemView().getSystemIcon( f );
+
+				if( icon != null ) {
+					if( icon instanceof ImageIcon )
+						icon = new ScaledImageIcon( (ImageIcon) icon );
+					cacheIcon( f, icon );
+					return icon;
+				}
+			}
+
+			// get default icon
+			icon = super.getIcon( f );
+
+			if( icon instanceof ImageIcon ) {
+				icon = new ScaledImageIcon( (ImageIcon) icon );
+				cacheIcon( f, icon );
+			}
+
+			return icon;
+		}
+	}
 }

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

@@ -112,6 +112,16 @@ public class FlatInternalFrameUI
 		private final Color activeBorderColor = UIManager.getColor( "InternalFrame.activeBorderColor" );
 		private final Color inactiveBorderColor = UIManager.getColor( "InternalFrame.inactiveBorderColor" );
 		private final int borderLineWidth = FlatUIUtils.getUIInt( "InternalFrame.borderLineWidth", 1 );
+		private final boolean dropShadowPainted = UIManager.getBoolean( "InternalFrame.dropShadowPainted" );
+
+		private final FlatDropShadowBorder activeDropShadowBorder = new FlatDropShadowBorder(
+			UIManager.getColor( "InternalFrame.activeDropShadowColor" ),
+			UIManager.getInsets( "InternalFrame.activeDropShadowInsets" ),
+			FlatUIUtils.getUIFloat( "InternalFrame.activeDropShadowOpacity", 0.5f ) );
+		private final FlatDropShadowBorder inactiveDropShadowBorder = new FlatDropShadowBorder(
+			UIManager.getColor( "InternalFrame.inactiveDropShadowColor" ),
+			UIManager.getInsets( "InternalFrame.inactiveDropShadowInsets" ),
+			FlatUIUtils.getUIFloat( "InternalFrame.inactiveDropShadowOpacity", 0.5f ) );
 
 		public FlatInternalFrameBorder() {
 			super( UIManager.getInsets( "InternalFrame.borderMargins" ) );
@@ -137,16 +147,31 @@ public class FlatInternalFrameUI
 			Insets insets = getBorderInsets( c );
 			float lineWidth = scale( (float) borderLineWidth );
 
+			float rx = x + insets.left - lineWidth;
+			float ry = y + insets.top - lineWidth;
+			float rwidth = width - insets.left - insets.right + (lineWidth * 2);
+			float rheight = height - insets.top - insets.bottom + (lineWidth * 2);
+
 			Graphics2D g2 = (Graphics2D) g.create();
 			try {
 				FlatUIUtils.setRenderingHints( g2 );
 				g2.setColor( f.isSelected() ? activeBorderColor : inactiveBorderColor );
-				g2.fill( FlatUIUtils.createRectangle(
-					x + insets.left - lineWidth,
-					y + insets.top - lineWidth,
-					width - insets.left - insets.right + (lineWidth * 2),
-					height - insets.top - insets.bottom + (lineWidth * 2),
-					lineWidth ) );
+
+				// paint drop shadow
+				if( dropShadowPainted ) {
+					FlatDropShadowBorder dropShadowBorder = f.isSelected()
+						? activeDropShadowBorder : inactiveDropShadowBorder;
+
+					Insets dropShadowInsets = dropShadowBorder.getBorderInsets();
+					dropShadowBorder.paintBorder( c, g2,
+						(int) rx - dropShadowInsets.left,
+						(int) ry - dropShadowInsets.top,
+						(int) rwidth + dropShadowInsets.left + dropShadowInsets.right,
+						(int) rheight + dropShadowInsets.top + dropShadowInsets.bottom );
+				}
+
+				// paint border
+				g2.fill( FlatUIUtils.createRectangle( rx, ry, rwidth, rheight, lineWidth ) );
 			} finally {
 				g2.dispose();
 			}

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

@@ -48,6 +48,14 @@ public class FlatLineBorder
 		this.lineThickness = lineThickness;
 	}
 
+	public Color getLineColor() {
+		return lineColor;
+	}
+
+	public float getLineThickness() {
+		return lineThickness;
+	}
+
 	@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/FlatMenuBarUI.java

@@ -16,9 +16,20 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.event.ActionEvent;
+import javax.swing.AbstractAction;
+import javax.swing.ActionMap;
 import javax.swing.JComponent;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.SwingUtilities;
+import javax.swing.plaf.ActionMapUIResource;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicMenuBarUI;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JMenuBar}.
@@ -38,4 +49,45 @@ public class FlatMenuBarUI
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatMenuBarUI();
 	}
+
+	/*
+	 * WARNING: This class is not used on macOS if screen menu bar is enabled.
+	 *          Do not add any functionality here.
+	 */
+
+	@Override
+	protected void installKeyboardActions() {
+		super.installKeyboardActions();
+
+		ActionMap map = SwingUtilities.getUIActionMap( menuBar );
+		if( map == null ) {
+			map = new ActionMapUIResource();
+			SwingUtilities.replaceUIActionMap( menuBar, map );
+		}
+		map.put( "takeFocus", new TakeFocus() );
+	}
+
+	//---- class TakeFocus ----------------------------------------------------
+
+	/**
+	 * Activates the menu bar and shows mnemonics.
+	 * On Windows, the popup of the first menu is not shown.
+	 * On other platforms, the popup of the first menu is shown.
+	 */
+	private static class TakeFocus
+		extends AbstractAction
+	{
+		@Override
+		public void actionPerformed( ActionEvent e ) {
+			JMenuBar menuBar = (JMenuBar) e.getSource();
+			JMenu menu = menuBar.getMenu( 0 );
+			if( menu != null ) {
+				MenuSelectionManager.defaultManager().setSelectedPath( SystemInfo.IS_WINDOWS
+					? new MenuElement[] { menuBar, menu }
+					: new MenuElement[] { menuBar, menu, menu.getPopupMenu() } );
+
+				FlatLaf.showMnemonics( menuBar );
+			}
+		}
+	}
 }

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

@@ -0,0 +1,516 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import static com.formdev.flatlaf.util.UIScale.scale;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Insets;
+import java.awt.Paint;
+import java.awt.Rectangle;
+import java.awt.event.InputEvent;
+import java.awt.event.KeyEvent;
+import java.text.AttributedCharacterIterator;
+import javax.swing.Icon;
+import javax.swing.JMenu;
+import javax.swing.JMenuItem;
+import javax.swing.KeyStroke;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.plaf.basic.BasicHTML;
+import javax.swing.text.View;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.util.Graphics2DProxy;
+
+/**
+ * Renderer for menu items.
+ *
+ * @uiDefault MenuItem.minimumWidth									int
+ * @uiDefault MenuItem.minimumIconSize								Dimension
+ * @uiDefault MenuItem.textAcceleratorGap							int
+ * @uiDefault MenuItem.textNoAcceleratorGap							int
+ * @uiDefault MenuItem.acceleratorArrowGap							int
+ * @uiDefault MenuItem.checkBackground								Color
+ * @uiDefault MenuItem.underlineSelectionBackground					Color
+ * @uiDefault MenuItem.underlineSelectionCheckBackground			Color
+ * @uiDefault MenuItem.underlineSelectionColor						Color
+ * @uiDefault MenuItem.underlineSelectionHeight						Color
+ *
+ * @author Karl Tauber
+ */
+public class FlatMenuItemRenderer
+{
+	protected final JMenuItem menuItem;
+	protected final Icon checkIcon;
+	protected final Icon arrowIcon;
+	protected final Font acceleratorFont;
+	protected final String acceleratorDelimiter;
+
+	protected final int minimumWidth = UIManager.getInt( "MenuItem.minimumWidth" );
+	protected final Dimension minimumIconSize;
+	protected final int textAcceleratorGap = FlatUIUtils.getUIInt( "MenuItem.textAcceleratorGap", 28 );
+	protected final int textNoAcceleratorGap = FlatUIUtils.getUIInt( "MenuItem.textNoAcceleratorGap", 6 );
+	protected final int acceleratorArrowGap = FlatUIUtils.getUIInt( "MenuItem.acceleratorArrowGap", 2 );
+
+	protected final Color checkBackground = UIManager.getColor( "MenuItem.checkBackground" );
+	protected final Insets checkMargins = UIManager.getInsets( "MenuItem.checkMargins" );
+
+	protected final Color underlineSelectionBackground = UIManager.getColor( "MenuItem.underlineSelectionBackground" );
+	protected final Color underlineSelectionCheckBackground = UIManager.getColor( "MenuItem.underlineSelectionCheckBackground" );
+	protected final Color underlineSelectionColor = UIManager.getColor( "MenuItem.underlineSelectionColor" );
+	protected final int underlineSelectionHeight = UIManager.getInt( "MenuItem.underlineSelectionHeight" );
+
+	protected FlatMenuItemRenderer( JMenuItem menuItem, Icon checkIcon, Icon arrowIcon,
+		Font acceleratorFont, String acceleratorDelimiter )
+	{
+		this.menuItem = menuItem;
+		this.checkIcon = checkIcon;
+		this.arrowIcon = arrowIcon;
+		this.acceleratorFont = acceleratorFont;
+		this.acceleratorDelimiter = acceleratorDelimiter;
+
+		Dimension minimumIconSize = UIManager.getDimension( "MenuItem.minimumIconSize" );
+		this.minimumIconSize = (minimumIconSize != null) ? minimumIconSize : new Dimension( 16, 16 );
+	}
+
+	protected Dimension getPreferredMenuItemSize() {
+		int width = 0;
+		int height = 0;
+		boolean isTopLevelMenu = isTopLevelMenu( menuItem );
+
+		Rectangle viewRect = new Rectangle( 0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE );
+		Rectangle iconRect = new Rectangle();
+		Rectangle textRect = new Rectangle();
+
+		// layout icon and text
+		SwingUtilities.layoutCompoundLabel( menuItem,
+			menuItem.getFontMetrics( menuItem.getFont() ), menuItem.getText(), getIconForLayout(),
+			menuItem.getVerticalAlignment(), menuItem.getHorizontalAlignment(),
+			menuItem.getVerticalTextPosition(), menuItem.getHorizontalTextPosition(),
+			viewRect, iconRect, textRect, scale( menuItem.getIconTextGap() ) );
+
+		// union icon and text rectangles
+		Rectangle labelRect = iconRect.union( textRect );
+		width += labelRect.width;
+		height = Math.max( labelRect.height, height );
+
+		// accelerator size
+		String accelText = getAcceleratorText();
+		if( accelText != null ) {
+			// gap between text and accelerator
+			width += scale( !isTopLevelMenu ? textAcceleratorGap : menuItem.getIconTextGap() );
+
+			FontMetrics accelFm = menuItem.getFontMetrics( acceleratorFont );
+			width += SwingUtilities.computeStringWidth( accelFm, accelText );
+			height = Math.max( accelFm.getHeight(), height );
+		}
+
+		// arrow size
+		if( !isTopLevelMenu && arrowIcon != null ) {
+			// gap between text and arrow
+			if( accelText == null )
+				width += scale( textNoAcceleratorGap );
+
+			// gap between accelerator and arrow
+			width += scale( acceleratorArrowGap );
+
+			width += arrowIcon.getIconWidth();
+			height = Math.max( arrowIcon.getIconHeight(), height );
+		}
+
+		// add insets
+		Insets insets = menuItem.getInsets();
+		width += insets.left + insets.right;
+		height += insets.top + insets.bottom;
+
+		// minimum width
+		if( !isTopLevelMenu ) {
+			int minimumWidth = FlatUIUtils.minimumWidth( menuItem, this.minimumWidth );
+			width = Math.max( width, scale( minimumWidth ) );
+		}
+
+		return new Dimension( width, height );
+	}
+
+	private void layout( Rectangle viewRect, Rectangle iconRect, Rectangle textRect,
+		Rectangle accelRect, Rectangle arrowRect, Rectangle labelRect )
+	{
+		boolean isTopLevelMenu = isTopLevelMenu( menuItem );
+
+		// layout arrow
+		if( !isTopLevelMenu && arrowIcon != null ) {
+			arrowRect.width = arrowIcon.getIconWidth();
+			arrowRect.height = arrowIcon.getIconHeight();
+		} else
+			arrowRect.setSize( 0, 0 );
+		arrowRect.y = viewRect.y + centerOffset( viewRect.height, arrowRect.height );
+
+		// layout accelerator
+		String accelText = getAcceleratorText();
+		if( accelText != null ) {
+			FontMetrics accelFm = menuItem.getFontMetrics( acceleratorFont );
+			accelRect.width = SwingUtilities.computeStringWidth( accelFm, accelText );
+			accelRect.height = accelFm.getHeight();
+
+			accelRect.y = viewRect.y + centerOffset( viewRect.height, accelRect.height );
+		} else
+			accelRect.setBounds( 0, 0, 0, 0 );
+
+		// compute horizontal positions of accelerator and arrow
+		int accelArrowGap = !isTopLevelMenu ? scale( acceleratorArrowGap ) : 0;
+		if( menuItem.getComponentOrientation().isLeftToRight() ) {
+			// left-to-right
+			arrowRect.x = viewRect.x + viewRect.width - arrowRect.width;
+			accelRect.x = arrowRect.x - accelArrowGap - accelRect.width;
+		} else {
+			// right-to-left
+			arrowRect.x = viewRect.x;
+			accelRect.x = arrowRect.x + accelArrowGap + arrowRect.width;
+		}
+
+		// width of accelerator, arrow and gap
+		int accelArrowWidth = accelRect.width + arrowRect.width;
+		if( accelText != null )
+			accelArrowWidth += scale( !isTopLevelMenu ? textAcceleratorGap : menuItem.getIconTextGap() );
+		if( !isTopLevelMenu && arrowIcon != null ) {
+			if( accelText == null )
+				accelArrowWidth += scale( textNoAcceleratorGap );
+			accelArrowWidth += scale( acceleratorArrowGap );
+		}
+
+		// label rectangle is view rectangle subtracted by accelerator, arrow and gap
+		labelRect.setBounds( viewRect );
+		labelRect.width -= accelArrowWidth;
+		if( !menuItem.getComponentOrientation().isLeftToRight() )
+			labelRect.x += accelArrowWidth;
+
+		// layout icon and text
+		SwingUtilities.layoutCompoundLabel( menuItem,
+			menuItem.getFontMetrics( menuItem.getFont() ), menuItem.getText(), getIconForLayout(),
+			menuItem.getVerticalAlignment(), menuItem.getHorizontalAlignment(),
+			menuItem.getVerticalTextPosition(), menuItem.getHorizontalTextPosition(),
+			labelRect, iconRect, textRect, scale( menuItem.getIconTextGap() ) );
+	}
+
+	private static int centerOffset( int wh1, int wh2 ) {
+		return (wh1 / 2) - (wh2 / 2);
+	}
+
+	protected void paintMenuItem( Graphics g, Color selectionBackground, Color selectionForeground,
+		Color disabledForeground, Color acceleratorForeground, Color acceleratorSelectionForeground )
+	{
+		Rectangle viewRect = new Rectangle( menuItem.getWidth(), menuItem.getHeight() );
+
+		// subtract insets
+		Insets insets = menuItem.getInsets();
+		viewRect.x += insets.left;
+		viewRect.y += insets.top;
+		viewRect.width -= (insets.left + insets.right);
+		viewRect.height -= (insets.top + insets.bottom);
+
+		Rectangle iconRect = new Rectangle();
+		Rectangle textRect = new Rectangle();
+		Rectangle accelRect = new Rectangle();
+		Rectangle arrowRect = new Rectangle();
+		Rectangle labelRect = new Rectangle();
+
+		layout( viewRect, iconRect, textRect, accelRect, arrowRect, labelRect );
+
+/*debug
+		g.setColor( Color.green ); g.drawRect( viewRect.x, viewRect.y, viewRect.width - 1, viewRect.height - 1 );
+		g.setColor( Color.red ); g.drawRect( labelRect.x, labelRect.y, labelRect.width - 1, labelRect.height - 1 );
+		g.setColor( Color.blue ); g.drawRect( iconRect.x, iconRect.y, iconRect.width - 1, iconRect.height - 1 );
+		g.setColor( Color.cyan ); g.drawRect( textRect.x, textRect.y, textRect.width - 1, textRect.height - 1 );
+		g.setColor( Color.magenta ); g.drawRect( accelRect.x, accelRect.y, accelRect.width - 1, accelRect.height - 1 );
+		g.setColor( Color.orange ); g.drawRect( arrowRect.x, arrowRect.y, arrowRect.width - 1, arrowRect.height - 1 );
+debug*/
+
+		paintBackground( g, selectionBackground );
+		paintIcon( g, iconRect, getIconForPainting() );
+		paintText( g, textRect, menuItem.getText(), selectionForeground, disabledForeground );
+		paintAccelerator( g, accelRect, getAcceleratorText(), acceleratorForeground, acceleratorSelectionForeground, disabledForeground );
+		if( !isTopLevelMenu( menuItem ) )
+			paintArrowIcon( g, arrowRect, arrowIcon );
+	}
+
+	protected void paintBackground( Graphics g, Color selectionBackground ) {
+		boolean armedOrSelected = isArmedOrSelected( menuItem );
+		if( menuItem.isOpaque() || armedOrSelected ) {
+			int width = menuItem.getWidth();
+			int height = menuItem.getHeight();
+
+			// paint background
+			g.setColor( armedOrSelected
+				? (isUnderlineSelection() ? underlineSelectionBackground : selectionBackground)
+				: menuItem.getBackground() );
+			g.fillRect( 0, 0, width, height );
+
+			// paint underline
+			if( armedOrSelected && isUnderlineSelection() ) {
+				int underlineHeight = scale( underlineSelectionHeight );
+				g.setColor( underlineSelectionColor );
+				if( isTopLevelMenu( menuItem ) ) {
+					// paint underline at bottom
+					g.fillRect( 0, height - underlineHeight, width, underlineHeight );
+				} else if( menuItem.getComponentOrientation().isLeftToRight() ) {
+					// paint underline at left side
+					g.fillRect( 0, 0, underlineHeight, height );
+				} else {
+					// paint underline at right side
+					g.fillRect( width - underlineHeight, 0, underlineHeight, height );
+				}
+			}
+		}
+	}
+
+	protected void paintIcon( Graphics g, Rectangle iconRect, Icon icon ) {
+		// if checkbox/radiobutton menu item is selected and also has a custom icon,
+		// then use filled icon background to indicate selection (instead of using checkIcon)
+		if( menuItem.isSelected() && checkIcon != null && icon != checkIcon ) {
+			Rectangle r = FlatUIUtils.addInsets( iconRect, scale( checkMargins ) );
+			g.setColor( isUnderlineSelection() ? underlineSelectionCheckBackground : checkBackground );
+			g.fillRect( r.x, r.y, r.width, r.height );
+		}
+
+		paintIcon( g, menuItem, icon, iconRect );
+	}
+
+	protected void paintText( Graphics g, Rectangle textRect, String text, Color selectionForeground, Color disabledForeground ) {
+		View htmlView = (View) menuItem.getClientProperty( BasicHTML.propertyKey );
+		if( htmlView != null ) {
+			paintHTMLText( g, menuItem, textRect, htmlView, isUnderlineSelection() ? null : selectionForeground );
+			return;
+		}
+
+		int mnemonicIndex = FlatLaf.isShowMnemonics() ? menuItem.getDisplayedMnemonicIndex() : -1;
+		Color foreground = menuItem.getForeground();
+
+		paintText( g, menuItem, textRect, text, mnemonicIndex, menuItem.getFont(),
+			foreground, isUnderlineSelection() ? foreground : selectionForeground, disabledForeground );
+	}
+
+	protected void paintAccelerator( Graphics g, Rectangle accelRect, String accelText,
+		Color foreground, Color selectionForeground, Color disabledForeground )
+	{
+		paintText( g, menuItem, accelRect, accelText, -1, acceleratorFont,
+			foreground, isUnderlineSelection() ? foreground : selectionForeground, disabledForeground );
+	}
+
+	protected void paintArrowIcon( Graphics g, Rectangle arrowRect, Icon arrowIcon ) {
+		paintIcon( g, menuItem, arrowIcon, arrowRect );
+	}
+
+	protected static void paintIcon( Graphics g, JMenuItem menuItem, Icon icon, Rectangle iconRect ) {
+		if( icon == null )
+			return;
+
+		// center because the real icon may be smaller than dimension in iconRect
+		int x = iconRect.x + centerOffset( iconRect.width, icon.getIconWidth() );
+		int y = iconRect.y + centerOffset( iconRect.height, icon.getIconHeight() );
+
+		// paint
+		icon.paintIcon( menuItem, g, x, y );
+	}
+
+	protected static void paintText( Graphics g, JMenuItem menuItem,
+		Rectangle textRect, String text, int mnemonicIndex, Font font,
+		Color foreground, Color selectionForeground, Color disabledForeground )
+	{
+		if( text == null || text.isEmpty() )
+			return;
+
+		FontMetrics fm = menuItem.getFontMetrics( font );
+
+		Font oldFont = g.getFont();
+		g.setFont( font );
+		g.setColor( !menuItem.isEnabled()
+			? disabledForeground
+			: (isArmedOrSelected( menuItem )
+				? selectionForeground
+				: foreground) );
+
+		FlatUIUtils.drawStringUnderlineCharAt( menuItem, g, text, mnemonicIndex,
+			textRect.x, textRect.y + fm.getAscent() );
+
+		g.setFont( oldFont );
+	}
+
+	protected static void paintHTMLText( Graphics g, JMenuItem menuItem,
+		Rectangle textRect, View htmlView, Color selectionForeground )
+	{
+		if( isArmedOrSelected( menuItem ) && selectionForeground != null )
+			g = new GraphicsProxyWithTextColor( (Graphics2D) g, selectionForeground );
+
+		htmlView.paint( g, textRect );
+	}
+
+	protected static boolean isArmedOrSelected( JMenuItem menuItem ) {
+		return menuItem.isArmed() || (menuItem instanceof JMenu && menuItem.isSelected());
+	}
+
+	protected static boolean isTopLevelMenu( JMenuItem menuItem ) {
+		return menuItem instanceof JMenu && ((JMenu)menuItem).isTopLevelMenu();
+	}
+
+	private boolean isUnderlineSelection() {
+		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
+	}
+
+	private Icon getIconForPainting() {
+		Icon icon = menuItem.getIcon();
+
+		if( icon == null && checkIcon != null && !isTopLevelMenu( menuItem ) )
+			return checkIcon;
+
+		if( icon == null )
+			return null;
+
+		if( !menuItem.isEnabled() )
+			return menuItem.getDisabledIcon();
+
+		if( menuItem.getModel().isPressed() && menuItem.isArmed() ) {
+			Icon pressedIcon = menuItem.getPressedIcon();
+			if( pressedIcon != null )
+				return pressedIcon;
+		}
+
+		return icon;
+	}
+
+	private Icon getIconForLayout() {
+		Icon icon = menuItem.getIcon();
+
+		if( isTopLevelMenu( menuItem ) )
+			return (icon != null) ? new MinSizeIcon( icon ) : null;
+
+		return new MinSizeIcon( (icon != null) ? icon : checkIcon );
+	}
+
+	private KeyStroke cachedAccelerator;
+	private String cachedAcceleratorText;
+
+	private String getAcceleratorText() {
+		KeyStroke accelerator = menuItem.getAccelerator();
+		if( accelerator == null )
+			return null;
+
+		if( accelerator == cachedAccelerator )
+			return cachedAcceleratorText;
+
+		StringBuilder buf = new StringBuilder();
+		int modifiers = accelerator.getModifiers();
+		if( modifiers != 0 )
+			buf.append( InputEvent.getModifiersExText( modifiers ) ).append( acceleratorDelimiter );
+
+		int keyCode = accelerator.getKeyCode();
+		if( keyCode != 0 )
+			buf.append( KeyEvent.getKeyText( keyCode ) );
+		else
+			buf.append( accelerator.getKeyChar() );
+
+		cachedAccelerator = accelerator;
+		cachedAcceleratorText = buf.toString();
+
+		return cachedAcceleratorText;
+	}
+
+	//---- class MinSizeIcon --------------------------------------------------
+
+	private class MinSizeIcon
+		implements Icon
+	{
+		private final Icon delegate;
+
+		MinSizeIcon( Icon delegate ) {
+			this.delegate = delegate;
+		}
+
+		@Override
+		public int getIconWidth() {
+			int iconWidth = (delegate != null) ? delegate.getIconWidth() : 0;
+			return Math.max( iconWidth, scale( minimumIconSize.width ) );
+		}
+
+		@Override
+		public int getIconHeight() {
+			int iconHeight = (delegate != null) ? delegate.getIconHeight() : 0;
+			return Math.max( iconHeight, scale( minimumIconSize.height ) );
+		}
+
+		@Override
+		public void paintIcon( Component c, Graphics g, int x, int y ) {
+		}
+	}
+
+	//---- class GraphicsProxyWithTextColor -----------------------------------
+
+	private static class GraphicsProxyWithTextColor
+		extends Graphics2DProxy
+	{
+		private final Color textColor;
+
+		GraphicsProxyWithTextColor( Graphics2D delegate, Color textColor ) {
+			super( delegate );
+			this.textColor = textColor;
+		}
+
+		@Override
+		public void drawString( String str, int x, int y ) {
+			Paint oldPaint = getPaint();
+			setPaint( textColor );
+			super.drawString( str, x, y );
+			setPaint( oldPaint );
+		}
+
+		@Override
+		public void drawString( String str, float x, float y ) {
+			Paint oldPaint = getPaint();
+			setPaint( textColor );
+			super.drawString( str, x, y );
+			setPaint( oldPaint );
+		}
+
+		@Override
+		public void drawString( AttributedCharacterIterator iterator, int x, int y ) {
+			Paint oldPaint = getPaint();
+			setPaint( textColor );
+			super.drawString( iterator, x, y );
+			setPaint( oldPaint );
+		}
+
+		@Override
+		public void drawString( AttributedCharacterIterator iterator, float x, float y ) {
+			Paint oldPaint = getPaint();
+			setPaint( textColor );
+			super.drawString( iterator, x, y );
+			setPaint( oldPaint );
+		}
+
+		@Override
+		public void drawChars( char[] data, int offset, int length, int x, int y ) {
+			Paint oldPaint = getPaint();
+			setPaint( textColor );
+			super.drawChars( data, offset, length, x, y );
+			setPaint( oldPaint );
+		}
+	}
+}

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

@@ -16,48 +16,47 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
-import java.awt.Color;
-import java.awt.FontMetrics;
+import java.awt.Dimension;
 import java.awt.Graphics;
-import java.awt.Rectangle;
-import java.beans.PropertyChangeListener;
-import javax.swing.ButtonModel;
+import javax.swing.Icon;
 import javax.swing.JComponent;
-import javax.swing.JMenu;
-import javax.swing.JMenuItem;
+import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicMenuItemUI;
-import com.formdev.flatlaf.FlatLaf;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JMenuItem}.
  *
  * <!-- BasicMenuItemUI -->
  *
- * @uiDefault MenuItem.font								Font
- * @uiDefault MenuItem.background						Color
- * @uiDefault MenuItem.foreground						Color
- * @uiDefault MenuItem.disabledForeground				Color
- * @uiDefault MenuItem.selectionBackground				Color
- * @uiDefault MenuItem.selectionForeground				Color
- * @uiDefault MenuItem.acceleratorForeground			Color
- * @uiDefault MenuItem.acceleratorSelectionForeground	Color
- * @uiDefault MenuItem.acceleratorFont					Font		defaults to MenuItem.font
- * @uiDefault MenuItem.acceleratorDelimiter				String
- * @uiDefault MenuItem.border							Border
- * @uiDefault MenuItem.borderPainted					boolean
- * @uiDefault MenuItem.margin							Insets
- * @uiDefault MenuItem.arrowIcon						Icon
- * @uiDefault MenuItem.checkIcon						Icon
- * @uiDefault MenuItem.opaque							boolean
- * @uiDefault MenuItem.evenHeight						boolean
+ * @uiDefault MenuItem.font											Font
+ * @uiDefault MenuItem.background									Color
+ * @uiDefault MenuItem.foreground									Color
+ * @uiDefault MenuItem.disabledForeground							Color
+ * @uiDefault MenuItem.selectionBackground							Color
+ * @uiDefault MenuItem.selectionForeground							Color
+ * @uiDefault MenuItem.acceleratorForeground						Color
+ * @uiDefault MenuItem.acceleratorSelectionForeground				Color
+ * @uiDefault MenuItem.acceleratorFont								Font		defaults to MenuItem.font
+ * @uiDefault MenuItem.acceleratorDelimiter							String
+ * @uiDefault MenuItem.border										Border
+ * @uiDefault MenuItem.borderPainted								boolean
+ * @uiDefault MenuItem.margin										Insets
+ * @uiDefault MenuItem.arrowIcon									Icon
+ * @uiDefault MenuItem.checkIcon									Icon
+ * @uiDefault MenuItem.opaque										boolean
+ *
+ * <!-- FlatMenuItemUI -->
+ *
+ * @uiDefault MenuItem.iconTextGap									int
  *
  * @author Karl Tauber
  */
 public class FlatMenuItemUI
 	extends BasicMenuItemUI
 {
+	private FlatMenuItemRenderer renderer;
+
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatMenuItemUI();
 	}
@@ -66,42 +65,30 @@ public class FlatMenuItemUI
 	protected void installDefaults() {
 		super.installDefaults();
 
-		// scale
-		defaultTextIconGap = scale( defaultTextIconGap );
-	}
+		LookAndFeel.installProperty( menuItem, "iconTextGap", FlatUIUtils.getUIInt( "MenuItem.iconTextGap", 4 ) );
 
-	/**
-	 * Scale defaultTextIconGap again if iconTextGap property has changed.
-	 */
-	@Override
-	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		PropertyChangeListener superListener = super.createPropertyChangeListener( c );
-		return e -> {
-			superListener.propertyChange( e );
-			if( e.getPropertyName() == "iconTextGap" )
-				defaultTextIconGap = scale( defaultTextIconGap );
-		};
+		renderer = createRenderer();
 	}
 
 	@Override
-	protected void paintText( Graphics g, JMenuItem menuItem, Rectangle textRect, String text ) {
-		paintText( g, menuItem, textRect, text, disabledForeground, selectionForeground );
+	protected void uninstallDefaults() {
+		super.uninstallDefaults();
+
+		renderer = null;
 	}
 
-	public static void paintText( Graphics g, JMenuItem menuItem, Rectangle textRect,
-		String text, Color disabledForeground, Color selectionForeground )
-	{
-		FontMetrics fm = menuItem.getFontMetrics( menuItem.getFont() );
-		int mnemonicIndex = FlatLaf.isShowMnemonics() ? menuItem.getDisplayedMnemonicIndex() : -1;
+	protected FlatMenuItemRenderer createRenderer() {
+		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
+	}
 
-		ButtonModel model = menuItem.getModel();
-		g.setColor( !model.isEnabled()
-			? disabledForeground
-			: (model.isArmed() || (menuItem instanceof JMenu && model.isSelected())
-				? selectionForeground
-				: menuItem.getForeground()) );
+	@Override
+	protected Dimension getPreferredMenuItemSize( JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap ) {
+		return renderer.getPreferredMenuItemSize();
+	}
 
-		FlatUIUtils.drawStringUnderlineCharAt( menuItem, g, text, mnemonicIndex,
-			textRect.x, textRect.y + fm.getAscent() );
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		renderer.paintMenuItem( g, selectionBackground, selectionForeground, disabledForeground,
+			acceleratorForeground, acceleratorSelectionForeground );
 	}
 }

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

@@ -16,16 +16,17 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Font;
 import java.awt.Graphics;
-import java.awt.Rectangle;
 import java.awt.event.MouseEvent;
-import java.beans.PropertyChangeListener;
 import javax.swing.ButtonModel;
+import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JMenu;
 import javax.swing.JMenuItem;
+import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
 import javax.swing.event.MouseInputListener;
 import javax.swing.plaf.ComponentUI;
@@ -36,30 +37,30 @@ import javax.swing.plaf.basic.BasicMenuUI;
  *
  * <!-- BasicMenuUI -->
  *
- * @uiDefault Menu.font								Font
- * @uiDefault Menu.background						Color
- * @uiDefault Menu.foreground						Color
- * @uiDefault Menu.disabledForeground				Color
- * @uiDefault Menu.selectionBackground				Color
- * @uiDefault Menu.selectionForeground				Color
- * @uiDefault Menu.acceleratorForeground			Color
- * @uiDefault Menu.acceleratorSelectionForeground	Color
- * @uiDefault MenuItem.acceleratorFont				Font		defaults to MenuItem.font
- * @uiDefault MenuItem.acceleratorDelimiter			String
- * @uiDefault Menu.border							Border
- * @uiDefault Menu.borderPainted					boolean
- * @uiDefault Menu.margin							Insets
- * @uiDefault Menu.arrowIcon						Icon
- * @uiDefault Menu.checkIcon						Icon
- * @uiDefault Menu.opaque							boolean
- * @uiDefault Menu.evenHeight						boolean
- * @uiDefault Menu.crossMenuMnemonic				boolean	default is false
- * @uiDefault Menu.useMenuBarBackgroundForTopLevel	boolean	default is false
- * @uiDefault MenuBar.background					Color	used if Menu.useMenuBarBackgroundForTopLevel is true
+ * @uiDefault Menu.font												Font
+ * @uiDefault Menu.background										Color
+ * @uiDefault Menu.foreground										Color
+ * @uiDefault Menu.disabledForeground								Color
+ * @uiDefault Menu.selectionBackground								Color
+ * @uiDefault Menu.selectionForeground								Color
+ * @uiDefault Menu.acceleratorForeground							Color
+ * @uiDefault Menu.acceleratorSelectionForeground					Color
+ * @uiDefault MenuItem.acceleratorFont								Font		defaults to MenuItem.font
+ * @uiDefault MenuItem.acceleratorDelimiter							String
+ * @uiDefault Menu.border											Border
+ * @uiDefault Menu.borderPainted									boolean
+ * @uiDefault Menu.margin											Insets
+ * @uiDefault Menu.arrowIcon										Icon
+ * @uiDefault Menu.checkIcon										Icon
+ * @uiDefault Menu.opaque											boolean
+ * @uiDefault Menu.crossMenuMnemonic								boolean	default is false
+ * @uiDefault Menu.useMenuBarBackgroundForTopLevel					boolean	default is false
+ * @uiDefault MenuBar.background									Color	used if Menu.useMenuBarBackgroundForTopLevel is true
  *
  * <!-- FlatMenuUI -->
  *
- * @uiDefault MenuBar.hoverBackground				Color
+ * @uiDefault MenuItem.iconTextGap									int
+ * @uiDefault MenuBar.hoverBackground								Color
  *
  * @author Karl Tauber
  */
@@ -67,6 +68,7 @@ public class FlatMenuUI
 	extends BasicMenuUI
 {
 	private Color hoverBackground;
+	private FlatMenuItemRenderer renderer;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatMenuUI();
@@ -76,12 +78,12 @@ public class FlatMenuUI
 	protected void installDefaults() {
 		super.installDefaults();
 
+		LookAndFeel.installProperty( menuItem, "iconTextGap", FlatUIUtils.getUIInt( "MenuItem.iconTextGap", 4 ) );
+
 		menuItem.setRolloverEnabled( true );
 
 		hoverBackground = UIManager.getColor( "MenuBar.hoverBackground" );
-
-		// scale
-		defaultTextIconGap = scale( defaultTextIconGap );
+		renderer = createRenderer();
 	}
 
 	@Override
@@ -89,19 +91,11 @@ public class FlatMenuUI
 		super.uninstallDefaults();
 
 		hoverBackground = null;
+		renderer = null;
 	}
 
-	/**
-	 * Scale defaultTextIconGap again if iconTextGap property has changed.
-	 */
-	@Override
-	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		PropertyChangeListener superListener = super.createPropertyChangeListener( c );
-		return e -> {
-			superListener.propertyChange( e );
-			if( e.getPropertyName() == "iconTextGap" )
-				defaultTextIconGap = scale( defaultTextIconGap );
-		};
+	protected FlatMenuItemRenderer createRenderer() {
+		return new FlatMenuRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
 
 	@Override
@@ -130,19 +124,37 @@ public class FlatMenuUI
 	}
 
 	@Override
-	protected void paintBackground( Graphics g, JMenuItem menuItem, Color bgColor ) {
-		ButtonModel model = menuItem.getModel();
-		if( model.isArmed() || model.isSelected() ) {
-			super.paintBackground( g, menuItem, bgColor );
-		} else if( model.isRollover() && model.isEnabled() && ((JMenu)menuItem).isTopLevelMenu() ) {
-			FlatUIUtils.setColor( g, hoverBackground, menuItem.getBackground() );
-			g.fillRect( 0, 0, menuItem.getWidth(), menuItem.getHeight() );
-		} else
-			super.paintBackground( g, menuItem, bgColor );
+	protected Dimension getPreferredMenuItemSize( JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap ) {
+		return renderer.getPreferredMenuItemSize();
 	}
 
 	@Override
-	protected void paintText( Graphics g, JMenuItem menuItem, Rectangle textRect, String text ) {
-		FlatMenuItemUI.paintText( g, menuItem, textRect, text, disabledForeground, selectionForeground );
+	public void paint( Graphics g, JComponent c ) {
+		renderer.paintMenuItem( g, selectionBackground, selectionForeground, disabledForeground,
+			acceleratorForeground, acceleratorSelectionForeground );
+	}
+
+	//---- class FlatMenuRenderer ---------------------------------------------
+
+	protected class FlatMenuRenderer
+		extends FlatMenuItemRenderer
+	{
+		protected FlatMenuRenderer( JMenuItem menuItem, Icon checkIcon, Icon arrowIcon,
+			Font acceleratorFont, String acceleratorDelimiter )
+		{
+			super( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
+		}
+
+		@Override
+		protected void paintBackground( Graphics g, Color selectionBackground ) {
+			ButtonModel model = menuItem.getModel();
+			if( model.isRollover() && !model.isArmed() && !model.isSelected() &&
+				model.isEnabled() && ((JMenu)menuItem).isTopLevelMenu() )
+			{
+				g.setColor( FlatUIUtils.deriveColor( hoverBackground, menuItem.getBackground() ) );
+				g.fillRect( 0, 0, menuItem.getWidth(), menuItem.getHeight() );
+			} else
+				super.paintBackground( g, selectionBackground );
+		}
 	}
 }

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

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
@@ -34,7 +33,6 @@ import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicPasswordFieldUI;
 import javax.swing.text.Caret;
 import javax.swing.text.JTextComponent;
-import com.formdev.flatlaf.FlatClientProperties;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JPasswordField}.
@@ -57,8 +55,6 @@ import com.formdev.flatlaf.FlatClientProperties;
  *
  * <!-- FlatPasswordFieldUI -->
  *
- * @uiDefault TextComponent.arc						int
- * @uiDefault Component.focusWidth					int
  * @uiDefault Component.minimumWidth				int
  * @uiDefault Component.isIntelliJTheme				boolean
  * @uiDefault PasswordField.placeholderForeground	Color
@@ -70,8 +66,6 @@ import com.formdev.flatlaf.FlatClientProperties;
 public class FlatPasswordFieldUI
 	extends BasicPasswordFieldUI
 {
-	protected int arc;
-	protected int focusWidth;
 	protected int minimumWidth;
 	protected boolean isIntelliJTheme;
 	protected Color placeholderForeground;
@@ -89,16 +83,14 @@ public class FlatPasswordFieldUI
 		super.installDefaults();
 
 		String prefix = getPropertyPrefix();
-		arc = UIManager.getInt( "TextComponent.arc" );
-		focusWidth = UIManager.getInt( "Component.focusWidth" );
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		placeholderForeground = UIManager.getColor( prefix + ".placeholderForeground" );
 		capsLockIcon = UIManager.getIcon( "PasswordField.capsLockIcon" );
 
-		LookAndFeel.installProperty( getComponent(), "opaque", focusWidth == 0 );
+		LookAndFeel.installProperty( getComponent(), "opaque", false );
 
-		MigLayoutVisualPadding.install( getComponent(), focusWidth );
+		MigLayoutVisualPadding.install( getComponent() );
 	}
 
 	@Override
@@ -153,14 +145,12 @@ public class FlatPasswordFieldUI
 	@Override
 	protected void propertyChange( PropertyChangeEvent e ) {
 		super.propertyChange( e );
-
-		if( FlatClientProperties.PLACEHOLDER_TEXT.equals( e.getPropertyName() ) )
-			getComponent().repaint();
+		FlatTextFieldUI.propertyChange( getComponent(), e );
 	}
 
 	@Override
 	protected void paintSafely( Graphics g ) {
-		FlatTextFieldUI.paintBackground( g, getComponent(), focusWidth, arc, isIntelliJTheme );
+		FlatTextFieldUI.paintBackground( g, getComponent(), isIntelliJTheme );
 		FlatTextFieldUI.paintPlaceholder( g, getComponent(), placeholderForeground );
 		paintCapsLock( g );
 		super.paintSafely( g );
@@ -184,18 +174,11 @@ public class FlatPasswordFieldUI
 
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
-		return applyMinimumWidth( super.getPreferredSize( c ), c );
+		return FlatTextFieldUI.applyMinimumWidth( c, super.getPreferredSize( c ), minimumWidth );
 	}
 
 	@Override
 	public Dimension getMinimumSize( JComponent c ) {
-		return applyMinimumWidth( super.getMinimumSize( c ), c );
-	}
-
-	private Dimension applyMinimumWidth( Dimension size, JComponent c ) {
-		int minimumWidth = FlatUIUtils.minimumWidth( getComponent(), this.minimumWidth );
-		int focusWidth = (c.getBorder() instanceof FlatBorder) ? this.focusWidth : 0;
-		size.width = Math.max( size.width, scale( minimumWidth + (focusWidth * 2) ) );
-		return size;
+		return FlatTextFieldUI.applyMinimumWidth( c, super.getMinimumSize( c ), minimumWidth );
 	}
 }

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

@@ -0,0 +1,375 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Insets;
+import java.awt.Panel;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Window;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import javax.swing.JComponent;
+import javax.swing.JLayeredPane;
+import javax.swing.JPanel;
+import javax.swing.Popup;
+import javax.swing.PopupFactory;
+import javax.swing.RootPaneContainer;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.border.Border;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.util.SystemInfo;
+
+/**
+ * A popup factory that adds drop shadows to popups on Windows.
+ * On macOS and Linux, heavy weight popups (without drop shadow) are produced and the
+ * operating system automatically adds drop shadows.
+ *
+ * @author Karl Tauber
+ */
+public class FlatPopupFactory
+	extends PopupFactory
+{
+	private Method java8getPopupMethod;
+	private Method java9getPopupMethod;
+
+	@Override
+	public Popup getPopup( Component owner, Component contents, int x, int y )
+		throws IllegalArgumentException
+	{
+		if( !isDropShadowPainted( owner, contents ) )
+			return new NonFlashingPopup( super.getPopup( owner, contents, x, y ), contents );
+
+		// macOS and Linux adds drop shadow to heavy weight popups
+		if( SystemInfo.IS_MAC || SystemInfo.IS_LINUX ) {
+			Popup popup = getHeavyWeightPopup( owner, contents, x, y );
+			if( popup == null )
+				popup = super.getPopup( owner, contents, x, y );
+			return new NonFlashingPopup( popup, contents );
+		}
+
+		// create drop shadow popup
+		return new DropShadowPopup( super.getPopup( owner, contents, x, y ), owner, contents );
+	}
+
+	private boolean isDropShadowPainted( Component owner, Component contents ) {
+		Boolean b = isDropShadowPainted( owner );
+		if( b != null )
+			return b;
+
+		b = isDropShadowPainted( contents );
+		if( b != null )
+			return b;
+
+		return UIManager.getBoolean( "Popup.dropShadowPainted" );
+	}
+
+	private Boolean isDropShadowPainted( Component c ) {
+		if( !(c instanceof JComponent) )
+			return null;
+
+		Object value = ((JComponent)c).getClientProperty( FlatClientProperties.POPUP_DROP_SHADOW_PAINTED );
+		return (value instanceof Boolean ) ? (Boolean) value : null;
+	}
+
+	/**
+	 * There is no API in Java 8 to force creation of heavy weight popups,
+	 * but it is possible with reflection. Java 9 provides a new method.
+	 *
+	 * When changing FlatLaf system requirements to Java 9+,
+	 * then this method can be replaced with:
+	 *    return getPopup( owner, contents, x, y, true );
+	 */
+	private Popup getHeavyWeightPopup( Component owner, Component contents, int x, int y )
+		throws IllegalArgumentException
+	{
+		try {
+			if( SystemInfo.IS_JAVA_9_OR_LATER ) {
+				if( java9getPopupMethod == null ) {
+					java9getPopupMethod = PopupFactory.class.getDeclaredMethod(
+						"getPopup", Component.class, Component.class, int.class, int.class, boolean.class );
+				}
+				return (Popup) java9getPopupMethod.invoke( this, owner, contents, x, y, true );
+			} else {
+				// Java 8
+				if( java8getPopupMethod == null ) {
+					java8getPopupMethod = PopupFactory.class.getDeclaredMethod(
+						"getPopup", Component.class, Component.class, int.class, int.class, int.class );
+					java8getPopupMethod.setAccessible( true );
+				}
+				return (Popup) java8getPopupMethod.invoke( this, owner, contents, x, y, /*HEAVY_WEIGHT_POPUP*/ 2 );
+			}
+		} catch( NoSuchMethodException | SecurityException | IllegalAccessException | InvocationTargetException ex ) {
+			// ignore
+			return null;
+		}
+	}
+
+	//---- class NonFlashingPopup ---------------------------------------------
+
+	private class NonFlashingPopup
+		extends Popup
+	{
+		private Popup delegate;
+
+		// heavy weight
+		protected Window popupWindow;
+		private Color oldPopupWindowBackground;
+
+		NonFlashingPopup( Popup delegate, Component contents ) {
+			this.delegate = delegate;
+
+			popupWindow = SwingUtilities.windowForComponent( contents );
+			if( popupWindow != null ) {
+				// heavy weight popup
+
+				// fix background flashing which may occur on some platforms
+				// (e.g. macOS and Linux) when using dark theme
+				oldPopupWindowBackground = popupWindow.getBackground();
+				popupWindow.setBackground( contents.getBackground() );
+			}
+		}
+
+		@Override
+		public void show() {
+			if( delegate != null )
+				delegate.show();
+		}
+
+		@Override
+		public void hide() {
+			if( delegate != null ) {
+				delegate.hide();
+				delegate = null;
+			}
+
+			if( popupWindow != null ) {
+				// restore background so that it can not affect other LaFs (when switching)
+				// because popup windows are cached and reused
+				popupWindow.setBackground( oldPopupWindowBackground );
+				popupWindow = null;
+			}
+		}
+	}
+
+	//---- class DropShadowPopup ----------------------------------------------
+
+	private class DropShadowPopup
+		extends NonFlashingPopup
+	{
+		private final Component owner;
+
+		// light weight
+		private JComponent lightComp;
+		private Border oldBorder;
+		private boolean oldOpaque;
+
+		// medium weight
+		private boolean mediumWeightShown;
+		private Panel mediumWeightPanel;
+		private JPanel dropShadowPanel;
+		private ComponentListener mediumPanelListener;
+
+		// heavy weight
+		private Popup dropShadowDelegate;
+		private Window dropShadowWindow;
+		private Color oldDropShadowWindowBackground;
+
+		DropShadowPopup( Popup delegate, Component owner, Component contents ) {
+			super( delegate, contents );
+			this.owner = owner;
+
+			Dimension size = contents.getPreferredSize();
+			if( size.width <= 0 || size.height <= 0 )
+				return;
+
+			if( popupWindow != null ) {
+				// heavy weight popup
+
+				// Since Java has a problem with sub-pixel text rendering on translucent
+				// windows, we can not make the popup window translucent for the drop shadow.
+				// (see https://bugs.openjdk.java.net/browse/JDK-8215980)
+				// The solution is to create a second translucent window that paints
+				// the drop shadow and is positioned behind the popup window.
+
+				// create panel that paints the drop shadow
+				JPanel dropShadowPanel = new JPanel();
+				dropShadowPanel.setBorder( createDropShadowBorder() );
+				dropShadowPanel.setOpaque( false );
+
+				// set preferred size of drop shadow panel
+				Dimension prefSize = popupWindow.getPreferredSize();
+				Insets insets = dropShadowPanel.getInsets();
+				dropShadowPanel.setPreferredSize( new Dimension(
+					prefSize.width + insets.left + insets.right,
+					prefSize.height + insets.top + insets.bottom ) );
+
+				// create heavy weight popup for drop shadow
+				int x = popupWindow.getX() - insets.left;
+				int y = popupWindow.getY() - insets.top;
+				dropShadowDelegate = getHeavyWeightPopup( owner, dropShadowPanel, x, y );
+
+				// make drop shadow popup window translucent
+				dropShadowWindow = SwingUtilities.windowForComponent( dropShadowPanel );
+				if( dropShadowWindow != null ) {
+					oldDropShadowWindowBackground = dropShadowWindow.getBackground();
+					dropShadowWindow.setBackground( new Color( 0, true ) );
+				}
+			} else {
+				mediumWeightPanel = (Panel) SwingUtilities.getAncestorOfClass( Panel.class, contents );
+				if( mediumWeightPanel != null ) {
+					// medium weight popup
+					dropShadowPanel = new JPanel();
+					dropShadowPanel.setBorder( createDropShadowBorder() );
+					dropShadowPanel.setOpaque( false );
+					dropShadowPanel.setSize( FlatUIUtils.addInsets( mediumWeightPanel.getSize(), dropShadowPanel.getInsets() ) );
+				} else {
+					// light weight popup
+					Container p = contents.getParent();
+					if( !(p instanceof JComponent) )
+						return;
+
+					lightComp = (JComponent) p;
+					oldBorder = lightComp.getBorder();
+					oldOpaque = lightComp.isOpaque();
+					lightComp.setBorder( createDropShadowBorder() );
+					lightComp.setOpaque( false );
+					lightComp.setSize( lightComp.getPreferredSize() );
+				}
+			}
+		}
+
+		private Border createDropShadowBorder() {
+			return new FlatDropShadowBorder(
+				UIManager.getColor( "Popup.dropShadowColor" ),
+				UIManager.getInsets( "Popup.dropShadowInsets" ),
+				FlatUIUtils.getUIFloat( "Popup.dropShadowOpacity", 0.5f ) );
+		}
+
+		@Override
+		public void show() {
+			if( dropShadowDelegate != null )
+				dropShadowDelegate.show();
+
+			if( mediumWeightPanel != null )
+				showMediumWeightDropShadow();
+
+			super.show();
+
+			// fix location of light weight popup in case it has left or top drop shadow
+			if( lightComp != null ) {
+				Insets insets = lightComp.getInsets();
+				if( insets.left != 0 || insets.top != 0 )
+					lightComp.setLocation( lightComp.getX() - insets.left, lightComp.getY() - insets.top );
+			}
+		}
+
+		@Override
+		public void hide() {
+			if( dropShadowDelegate != null ) {
+				dropShadowDelegate.hide();
+				dropShadowDelegate = null;
+			}
+
+			if( mediumWeightPanel != null ) {
+				hideMediumWeightDropShadow();
+				dropShadowPanel = null;
+				mediumWeightPanel = null;
+			}
+
+			super.hide();
+
+			if( dropShadowWindow != null ) {
+				dropShadowWindow.setBackground( oldDropShadowWindowBackground );
+				dropShadowWindow = null;
+			}
+
+			if( lightComp != null ) {
+				lightComp.setBorder( oldBorder );
+				lightComp.setOpaque( oldOpaque );
+				lightComp = null;
+			}
+		}
+
+		private void showMediumWeightDropShadow() {
+			if( mediumWeightShown )
+				return;
+
+			mediumWeightShown = true;
+
+			Window window = SwingUtilities.windowForComponent( owner );
+			if( window == null )
+				return;
+
+			if( !(window instanceof RootPaneContainer) )
+				return;
+
+			dropShadowPanel.setVisible( false );
+
+			JLayeredPane layeredPane = ((RootPaneContainer)window).getLayeredPane();
+			layeredPane.add( dropShadowPanel, JLayeredPane.POPUP_LAYER, 0 );
+
+			mediumPanelListener = new ComponentListener() {
+				@Override
+				public void componentShown( ComponentEvent e ) {
+					if( dropShadowPanel != null )
+						dropShadowPanel.setVisible( true );
+				}
+
+				@Override
+				public void componentHidden( ComponentEvent e ) {
+					if( dropShadowPanel != null )
+						dropShadowPanel.setVisible( false );
+				}
+
+				@Override
+				public void componentMoved( ComponentEvent e ) {
+					if( dropShadowPanel != null && mediumWeightPanel != null ) {
+						Point location = mediumWeightPanel.getLocation();
+						Insets insets = dropShadowPanel.getInsets();
+						dropShadowPanel.setLocation( location.x - insets.left, location.y - insets.top );
+					}
+				}
+
+				@Override
+				public void componentResized( ComponentEvent e ) {
+					if( dropShadowPanel != null )
+						dropShadowPanel.setSize( FlatUIUtils.addInsets( mediumWeightPanel.getSize(), dropShadowPanel.getInsets() ) );
+				}
+			};
+			mediumWeightPanel.addComponentListener( mediumPanelListener );
+		}
+
+		private void hideMediumWeightDropShadow() {
+			mediumWeightPanel.removeComponentListener( mediumPanelListener );
+
+			Container parent = dropShadowPanel.getParent();
+			if( parent != null ) {
+				Rectangle bounds = dropShadowPanel.getBounds();
+				parent.remove( dropShadowPanel );
+				parent.repaint( bounds.x, bounds.y, bounds.width, bounds.height );
+			}
+		}
+	}
+}

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

@@ -16,12 +16,11 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
+import java.awt.Dimension;
 import java.awt.Graphics;
-import java.awt.Rectangle;
-import java.beans.PropertyChangeListener;
+import javax.swing.Icon;
 import javax.swing.JComponent;
-import javax.swing.JMenuItem;
+import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicRadioButtonMenuItemUI;
 
@@ -46,13 +45,18 @@ import javax.swing.plaf.basic.BasicRadioButtonMenuItemUI;
  * @uiDefault RadioButtonMenuItem.arrowIcon							Icon
  * @uiDefault RadioButtonMenuItem.checkIcon							Icon
  * @uiDefault RadioButtonMenuItem.opaque							boolean
- * @uiDefault RadioButtonMenuItem.evenHeight						boolean
+ *
+ * <!-- FlatRadioButtonMenuItemUI -->
+ *
+ * @uiDefault MenuItem.iconTextGap									int
  *
  * @author Karl Tauber
  */
 public class FlatRadioButtonMenuItemUI
 	extends BasicRadioButtonMenuItemUI
 {
+	private FlatMenuItemRenderer renderer;
+
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatRadioButtonMenuItemUI();
 	}
@@ -61,25 +65,30 @@ public class FlatRadioButtonMenuItemUI
 	protected void installDefaults() {
 		super.installDefaults();
 
-		// scale
-		defaultTextIconGap = scale( defaultTextIconGap );
-	}
+		LookAndFeel.installProperty( menuItem, "iconTextGap", FlatUIUtils.getUIInt( "MenuItem.iconTextGap", 4 ) );
 
-	/**
-	 * Scale defaultTextIconGap again if iconTextGap property has changed.
-	 */
-	@Override
-	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		PropertyChangeListener superListener = super.createPropertyChangeListener( c );
-		return e -> {
-			superListener.propertyChange( e );
-			if( e.getPropertyName() == "iconTextGap" )
-				defaultTextIconGap = scale( defaultTextIconGap );
-		};
+		renderer = createRenderer();
 	}
 
 	@Override
-	protected void paintText( Graphics g, JMenuItem menuItem, Rectangle textRect, String text ) {
-		FlatMenuItemUI.paintText( g, menuItem, textRect, text, disabledForeground, selectionForeground );
+	protected void uninstallDefaults() {
+		super.uninstallDefaults();
+
+		renderer = null;
+	}
+
+	protected FlatMenuItemRenderer createRenderer() {
+		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
+	}
+
+	@Override
+	protected Dimension getPreferredMenuItemSize( JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap ) {
+		return renderer.getPreferredMenuItemSize();
+	}
+
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		renderer.paintMenuItem( g, selectionBackground, selectionForeground, disabledForeground,
+			acceleratorForeground, acceleratorSelectionForeground );
 	}
 }

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

@@ -23,7 +23,6 @@ import java.awt.Graphics;
 import java.awt.Insets;
 import java.awt.Rectangle;
 import javax.swing.AbstractButton;
-import javax.swing.CellRendererPane;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
@@ -122,11 +121,10 @@ public class FlatRadioButtonUI
 	public void paint( Graphics g, JComponent c ) {
 		// fill background even if not opaque if
 		// - contentAreaFilled is true and
-		//   - used as cell renderer (because of selection background)
-		//   - or if background was explicitly set to a non-UIResource color
+		// - if background was explicitly set to a non-UIResource color
 		if( !c.isOpaque() &&
 			((AbstractButton)c).isContentAreaFilled() &&
-			(c.getParent() instanceof CellRendererPane || !(c.getBackground() instanceof UIResource)))
+			!(c.getBackground() instanceof UIResource) )
 		{
 			g.setColor( c.getBackground() );
 			g.fillRect( 0, 0, c.getWidth(), c.getHeight() );

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

@@ -16,8 +16,15 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.Color;
+import java.awt.Container;
 import javax.swing.JComponent;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
+import javax.swing.JRootPane;
+import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicRootPaneUI;
 
 /**
@@ -35,4 +42,21 @@ public class FlatRootPaneUI
 			instance = new FlatRootPaneUI();
 		return instance;
 	}
+
+	@Override
+	protected void installDefaults( JRootPane c ) {
+		super.installDefaults( c );
+
+		// Update background color of JFrame or JDialog parent to avoid bad border
+		// on HiDPI screens when switching from light to dark Laf.
+		// The background of JFrame is initialized in JFrame.frameInit() and
+		// the background of JDialog in JDialog.dialogInit(),
+		// but it was not updated when switching Laf.
+		Container parent = c.getParent();
+		if( parent instanceof JFrame || parent instanceof JDialog ) {
+			Color background = parent.getBackground();
+			if( background == null || background instanceof UIResource )
+				parent.setBackground( UIManager.getColor( "control" ) );
+		}
+	}
 }

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

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Component;
 import javax.swing.UIManager;
 
@@ -33,7 +32,7 @@ public class FlatRoundBorder
 	protected final int arc = UIManager.getInt( "Component.arc" );
 
 	@Override
-	protected float getArc( Component c ) {
-		return scale( (float) arc );
+	protected int getArc( Component c ) {
+		return FlatUIUtils.isRoundRect( c ) ? Short.MAX_VALUE : arc;
 	}
 }

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

@@ -19,6 +19,8 @@ package com.formdev.flatlaf.ui;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Insets;
 import java.awt.Rectangle;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
@@ -28,6 +30,7 @@ import java.util.Objects;
 import javax.swing.InputMap;
 import javax.swing.JButton;
 import javax.swing.JComponent;
+import javax.swing.JScrollBar;
 import javax.swing.JScrollPane;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
@@ -52,8 +55,13 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * <!-- FlatScrollBarUI -->
  *
+ * @uiDefault ScrollBar.trackInsets					Insets
+ * @uiDefault ScrollBar.thumbInsets					Insets
+ * @uiDefault ScrollBar.trackArc					int
+ * @uiDefault ScrollBar.thumbArc					int
  * @uiDefault ScrollBar.hoverTrackColor				Color
  * @uiDefault ScrollBar.hoverThumbColor				Color
+ * @uiDefault ScrollBar.hoverThumbWithTrack			boolean
  * @uiDefault Component.arrowType					String	triangle (default) or chevron
  * @uiDefault ScrollBar.showButtons					boolean
  * @uiDefault ScrollBar.buttonArrowColor			Color
@@ -64,8 +72,13 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatScrollBarUI
 	extends BasicScrollBarUI
 {
+	protected Insets trackInsets;
+	protected Insets thumbInsets;
+	protected int trackArc;
+	protected int thumbArc;
 	protected Color hoverTrackColor;
 	protected Color hoverThumbColor;
+	protected boolean hoverThumbWithTrack;
 
 	protected boolean showButtons;
 	protected String arrowType;
@@ -73,8 +86,8 @@ public class FlatScrollBarUI
 	protected Color buttonDisabledArrowColor;
 
 	private MouseAdapter hoverListener;
-	private boolean hoverTrack;
-	private boolean hoverThumb;
+	protected boolean hoverTrack;
+	protected boolean hoverThumb;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatScrollBarUI();
@@ -102,8 +115,13 @@ public class FlatScrollBarUI
 	protected void installDefaults() {
 		super.installDefaults();
 
+		trackInsets = UIManager.getInsets( "ScrollBar.trackInsets" );
+		thumbInsets = UIManager.getInsets( "ScrollBar.thumbInsets" );
+		trackArc = UIManager.getInt( "ScrollBar.trackArc" );
+		thumbArc = UIManager.getInt( "ScrollBar.thumbArc" );
 		hoverTrackColor = UIManager.getColor( "ScrollBar.hoverTrackColor" );
 		hoverThumbColor = UIManager.getColor( "ScrollBar.hoverThumbColor" );
+		hoverThumbWithTrack = UIManager.getBoolean( "ScrollBar.hoverThumbWithTrack" );
 
 		showButtons = UIManager.getBoolean( "ScrollBar.showButtons" );
 		arrowType = UIManager.getString( "Component.arrowType" );
@@ -115,6 +133,8 @@ public class FlatScrollBarUI
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		trackInsets = null;
+		thumbInsets = null;
 		hoverTrackColor = null;
 		hoverThumbColor = null;
 
@@ -171,6 +191,11 @@ public class FlatScrollBarUI
 		FlatArrowButton button = new FlatArrowButton( orientation,
 			arrowType, buttonArrowColor, buttonDisabledArrowColor, null, hoverTrackColor )
 		{
+			@Override
+			protected Color deriveHoverBackground( Color hoverBackground ) {
+				return getTrackColor( scrollbar, true ) ;
+			}
+
 			@Override
 			public Dimension getPreferredSize() {
 				if( isShowButtons() ) {
@@ -203,6 +228,45 @@ public class FlatScrollBarUI
 		return (showButtons != null) ? Objects.equals( showButtons, true ) : this.showButtons;
 	}
 
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		FlatUIUtils.setRenderingHints( (Graphics2D) g );
+		super.paint( g, c );
+	}
+
+	@Override
+	protected void paintTrack( Graphics g, JComponent c, Rectangle trackBounds ) {
+		g.setColor( getTrackColor( c, hoverTrack ) );
+		paintTrackOrThumb( g, c, trackBounds, trackInsets, trackArc );
+	}
+
+	@Override
+	protected void paintThumb( Graphics g, JComponent c, Rectangle thumbBounds ) {
+		if( thumbBounds.isEmpty() || !scrollbar.isEnabled() )
+			return;
+
+		g.setColor( getThumbColor( c, hoverThumb ) );
+		paintTrackOrThumb( g, c, thumbBounds, thumbInsets, thumbArc );
+	}
+
+	protected void paintTrackOrThumb( Graphics g, JComponent c, Rectangle bounds, Insets insets, int arc ) {
+		// rotate insets for horizontal orientation because they are given for vertical orientation
+		if( scrollbar.getOrientation() == JScrollBar.HORIZONTAL )
+			insets = new Insets( insets.right, insets.top, insets.left, insets.bottom );
+
+		// subtract insets from bounds
+		bounds = FlatUIUtils.subtractInsets( bounds, UIScale.scale( insets ) );
+
+		if( arc <= 0 ) {
+			// paint rectangle
+			g.fillRect( bounds.x, bounds.y, bounds.width, bounds.height );
+		} else {
+			// paint round rectangle
+			arc = Math.min( UIScale.scale( arc ), Math.min( bounds.width, bounds.height ) );
+			g.fillRoundRect( bounds.x, bounds.y, bounds.width, bounds.height, arc, arc );
+		}
+	}
+
 	@Override
 	protected void paintDecreaseHighlight( Graphics g ) {
 		// do not paint
@@ -213,19 +277,15 @@ public class FlatScrollBarUI
 		// do not paint
 	}
 
-	@Override
-	protected void paintTrack( Graphics g, JComponent c, Rectangle trackBounds ) {
-		g.setColor( hoverTrack ? hoverTrackColor : trackColor );
-		g.fillRect( trackBounds.x, trackBounds.y, trackBounds.width, trackBounds.height );
+	protected Color getTrackColor( JComponent c, boolean hover ) {
+		Color trackColor = FlatUIUtils.deriveColor( this.trackColor, c.getBackground() );
+		return hover ? FlatUIUtils.deriveColor( hoverTrackColor, trackColor ) : trackColor;
 	}
 
-	@Override
-	protected void paintThumb( Graphics g, JComponent c, Rectangle thumbBounds ) {
-		if( thumbBounds.isEmpty() || !scrollbar.isEnabled() )
-			return;
-
-		g.setColor( hoverThumb ? hoverThumbColor : thumbColor );
-		g.fillRect( thumbBounds.x, thumbBounds.y, thumbBounds.width, thumbBounds.height );
+	protected Color getThumbColor( JComponent c, boolean hover ) {
+		Color trackColor = FlatUIUtils.deriveColor( this.trackColor, c.getBackground() );
+		Color thumbColor = FlatUIUtils.deriveColor( this.thumbColor, trackColor );
+		return hover ? FlatUIUtils.deriveColor( hoverThumbColor, thumbColor ) : thumbColor;
 	}
 
 	@Override
@@ -276,7 +336,7 @@ public class FlatScrollBarUI
 			boolean inThumb = getThumbBounds().contains( x, y );
 			if( inTrack != hoverTrack || inThumb != hoverThumb ) {
 				hoverTrack = inTrack;
-				hoverThumb = inThumb;
+				hoverThumb = inThumb || (hoverThumbWithTrack && inTrack);
 				repaint();
 			}
 		}

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

@@ -83,7 +83,7 @@ public class FlatScrollPaneUI
 		int focusWidth = UIManager.getInt( "Component.focusWidth" );
 		LookAndFeel.installProperty( c, "opaque", focusWidth == 0 );
 
-		MigLayoutVisualPadding.install( scrollpane, focusWidth );
+		MigLayoutVisualPadding.install( scrollpane );
 	}
 
 	@Override

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

@@ -201,7 +201,7 @@ public class FlatSliderUI
 		}
 
 		if( coloredTrack != null ) {
-			FlatUIUtils.setColor( g, FlatUIUtils.isPermanentFocusOwner( slider ) ? focusColor : (hover ? hoverColor : thumbColor), thumbColor );
+			g.setColor( FlatUIUtils.deriveColor( FlatUIUtils.isPermanentFocusOwner( slider ) ? focusColor : (hover ? hoverColor : thumbColor), thumbColor ) );
 			((Graphics2D)g).fill( coloredTrack );
 		}
 
@@ -211,10 +211,10 @@ public class FlatSliderUI
 
 	@Override
 	public void paintThumb( Graphics g ) {
-		FlatUIUtils.setColor( g, slider.isEnabled()
+		g.setColor( FlatUIUtils.deriveColor( slider.isEnabled()
 			? (FlatUIUtils.isPermanentFocusOwner( slider ) ? focusColor : (hover ? hoverColor : thumbColor))
 			: disabledForeground,
-			thumbColor );
+			thumbColor ) );
 
 		if( isRoundThumb() )
 			g.fillOval( thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height );

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

@@ -40,6 +40,7 @@ import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicSpinnerUI;
+import com.formdev.flatlaf.FlatClientProperties;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JSpinner}.
@@ -56,8 +57,6 @@ import javax.swing.plaf.basic.BasicSpinnerUI;
  *
  * <!-- FlatSpinnerUI -->
  *
- * @uiDefault Component.focusWidth				int
- * @uiDefault Component.arc						int
  * @uiDefault Component.minimumWidth			int
  * @uiDefault Component.arrowType				String	triangle (default) or chevron
  * @uiDefault Component.isIntelliJTheme			boolean
@@ -78,8 +77,6 @@ public class FlatSpinnerUI
 {
 	private Handler handler;
 
-	protected int focusWidth;
-	protected int arc;
 	protected int minimumWidth;
 	protected String arrowType;
 	protected boolean isIntelliJTheme;
@@ -103,8 +100,6 @@ public class FlatSpinnerUI
 
 		LookAndFeel.installProperty( spinner, "opaque", false );
 
-		focusWidth = UIManager.getInt( "Component.focusWidth" );
-		arc = UIManager.getInt( "Component.arc" );
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
 		arrowType = UIManager.getString( "Component.arrowType" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
@@ -121,7 +116,7 @@ public class FlatSpinnerUI
 		// scale
 		padding = scale( padding );
 
-		MigLayoutVisualPadding.install( spinner, focusWidth );
+		MigLayoutVisualPadding.install( spinner );
 	}
 
 	@Override
@@ -146,6 +141,7 @@ public class FlatSpinnerUI
 		super.installListeners();
 
 		addEditorFocusListener( spinner.getEditor() );
+		spinner.addFocusListener( getHandler() );
 		spinner.addPropertyChangeListener( getHandler() );
 	}
 
@@ -154,6 +150,7 @@ public class FlatSpinnerUI
 		super.uninstallListeners();
 
 		removeEditorFocusListener( spinner.getEditor() );
+		spinner.removeFocusListener( getHandler() );
 		spinner.removePropertyChangeListener( getHandler() );
 
 		handler = null;
@@ -211,7 +208,7 @@ public class FlatSpinnerUI
 		}
 	}
 
-	private JTextField getEditorTextField( JComponent editor ) {
+	private static JTextField getEditorTextField( JComponent editor ) {
 		return editor instanceof JSpinner.DefaultEditor
 			? ((JSpinner.DefaultEditor)editor).getTextField()
 			: null;
@@ -246,8 +243,11 @@ public class FlatSpinnerUI
 
 	@Override
 	public void update( Graphics g, JComponent c ) {
+		float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
+		float arc = FlatUIUtils.getBorderArc( c );
+
 		// fill background if opaque to avoid garbage if user sets opaque to true
-		if( c.isOpaque() && (focusWidth > 0 || arc != 0) )
+		if( c.isOpaque() && (focusWidth > 0 || arc > 0) )
 			FlatUIUtils.paintParentBackground( g, c );
 
 		Graphics2D g2 = (Graphics2D) g;
@@ -255,8 +255,6 @@ public class FlatSpinnerUI
 
 		int width = c.getWidth();
 		int height = c.getHeight();
-		float focusWidth = (c.getBorder() instanceof FlatBorder) ? scale( (float) this.focusWidth ) : 0;
-		float arc = (c.getBorder() instanceof FlatRoundBorder) ? scale( (float) this.arc ) : 0;
 		Component nextButton = getHandler().nextButton;
 		int arrowX = nextButton.getX();
 		int arrowWidth = nextButton.getWidth();
@@ -328,8 +326,9 @@ public class FlatSpinnerUI
 			// the arrows width is the same as the inner height so that the arrows area is square
 			int minimumWidth = FlatUIUtils.minimumWidth( spinner, FlatSpinnerUI.this.minimumWidth );
 			int innerHeight = editorSize.height + padding.top + padding.bottom;
+			float focusWidth = FlatUIUtils.getBorderFocusWidth( spinner );
 			return new Dimension(
-				Math.max( insets.left + insets.right + editorSize.width + padding.left + padding.right + innerHeight, scale( minimumWidth + (focusWidth * 2) ) ),
+				Math.max( insets.left + insets.right + editorSize.width + padding.left + padding.right + innerHeight, scale( minimumWidth ) + Math.round( focusWidth * 2 ) ),
 				insets.top + insets.bottom + innerHeight );
 		}
 
@@ -368,12 +367,14 @@ public class FlatSpinnerUI
 			if( editor != null )
 				editor.setBounds( FlatUIUtils.subtractInsets( editorRect, padding ) );
 
-			int nextHeight = Math.round( buttonsRect.height / 2f );
+			int nextHeight = (buttonsRect.height / 2) + (buttonsRect.height % 2); // round up
 			if( nextButton != null )
 				nextButton.setBounds( buttonsRect.x, buttonsRect.y, buttonsRect.width, nextHeight );
 			if( previousButton != null ) {
-				previousButton.setBounds( buttonsRect.x, buttonsRect.y + nextHeight,
-					buttonsRect.width, buttonsRect.height - nextHeight );
+				// for precise layout of arrows, the "previous" button has the same height
+				// as the "next" button and may overlap on uneven buttonsRect.height
+				int previousY = buttonsRect.y + buttonsRect.height - nextHeight;
+				previousButton.setBounds( buttonsRect.x, previousY, buttonsRect.width, nextHeight );
 			}
 		}
 
@@ -382,6 +383,13 @@ public class FlatSpinnerUI
 		@Override
 		public void focusGained( FocusEvent e ) {
 			spinner.repaint();
+
+			// if spinner gained focus, transfer it to the editor text field
+			if( e.getComponent() == spinner ) {
+				JTextField textField = getEditorTextField( spinner.getEditor() );
+				if( textField != null )
+					textField.requestFocusInWindow();
+			}
 		}
 
 		@Override
@@ -398,6 +406,14 @@ public class FlatSpinnerUI
 				case "enabled":
 					updateEditorColors();
 					break;
+
+				case FlatClientProperties.COMPONENT_ROUND_RECT:
+					spinner.repaint();
+					break;
+
+				case FlatClientProperties.MINIMUM_WIDTH:
+					spinner.revalidate();
+					break;
 			}
 		}
 	}

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

@@ -20,11 +20,13 @@ import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
+import javax.swing.JCheckBox;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicTableUI;
+import javax.swing.table.TableCellRenderer;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -132,6 +134,12 @@ public class FlatTableUI
 			oldIntercellSpacing = table.getIntercellSpacing();
 			table.setIntercellSpacing( intercellSpacing );
 		}
+
+		// checkbox is non-opaque in FlatLaf and therefore would not paint selection
+		// --> make checkbox renderer opaque (but opaque in Metal or Windows LaF)
+		TableCellRenderer booleanRenderer = table.getDefaultRenderer( Boolean.class );
+		if( booleanRenderer instanceof JCheckBox )
+			((JCheckBox)booleanRenderer).setOpaque( true );
 	}
 
 	@Override

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

@@ -16,10 +16,10 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.beans.PropertyChangeEvent;
 import javax.swing.JComponent;
 import javax.swing.JTextArea;
 import javax.swing.UIManager;
@@ -83,6 +83,12 @@ public class FlatTextAreaUI
 		inactiveBackground = null;
 	}
 
+	@Override
+	protected void propertyChange( PropertyChangeEvent e ) {
+		super.propertyChange( e );
+		FlatEditorPaneUI.propertyChange( getComponent(), e );
+	}
+
 	@Override
 	protected void paintBackground( Graphics g ) {
 		JTextComponent c = getComponent();
@@ -100,25 +106,19 @@ public class FlatTextAreaUI
 
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
-		return applyMinimumWidth( super.getPreferredSize( c ), c );
+		return applyMinimumWidth( c, super.getPreferredSize( c ) );
 	}
 
 	@Override
 	public Dimension getMinimumSize( JComponent c ) {
-		return applyMinimumWidth( super.getMinimumSize( c ), c );
+		return applyMinimumWidth( c, super.getMinimumSize( c ) );
 	}
 
-	private Dimension applyMinimumWidth( Dimension size, JComponent c ) {
+	private Dimension applyMinimumWidth( JComponent c, Dimension size ) {
 		// do not apply minimum width if JTextArea.columns is set
 		if( c instanceof JTextArea && ((JTextArea)c).getColumns() > 0 )
 			return size;
 
-		// Assume that text area is in a scroll pane (that displays the border)
-		// and subtract 1px border line width.
-		// Using "(scale( 1 ) * 2)" instead of "scale( 2 )" to deal with rounding
-		// issues. E.g. at scale factor 1.5 the first returns 4, but the second 3.
-		int minimumWidth = FlatUIUtils.minimumWidth( getComponent(), this.minimumWidth );
-		size.width = Math.max( size.width, scale( minimumWidth ) - (scale( 1 ) * 2) );
-		return size;
+		return FlatEditorPaneUI.applyMinimumWidth( c, size, minimumWidth );
 	}
 }

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

@@ -16,14 +16,13 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Component;
 import javax.swing.UIManager;
 
 /**
  * Border for various text components (e.g. {@link javax.swing.JTextField}).
  *
- * @uiDefault Component.arc					int
+ * @uiDefault TextComponent.arc				int
  *
  * @author Karl Tauber
  */
@@ -33,7 +32,7 @@ public class FlatTextBorder
 	protected final int arc = UIManager.getInt( "TextComponent.arc" );
 
 	@Override
-	protected float getArc( Component c ) {
-		return scale( (float) arc );
+	protected int getArc( Component c ) {
+		return FlatUIUtils.isRoundRect( c ) ? Short.MAX_VALUE : arc;
 	}
 }

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

@@ -32,7 +32,6 @@ import javax.swing.JSpinner;
 import javax.swing.JTextField;
 import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
-import javax.swing.border.Border;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicTextFieldUI;
@@ -60,8 +59,6 @@ import com.formdev.flatlaf.FlatClientProperties;
  *
  * <!-- FlatTextFieldUI -->
  *
- * @uiDefault TextComponent.arc					int
- * @uiDefault Component.focusWidth				int
  * @uiDefault Component.minimumWidth			int
  * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault TextField.placeholderForeground	Color
@@ -72,8 +69,6 @@ import com.formdev.flatlaf.FlatClientProperties;
 public class FlatTextFieldUI
 	extends BasicTextFieldUI
 {
-	protected int arc;
-	protected int focusWidth;
 	protected int minimumWidth;
 	protected boolean isIntelliJTheme;
 	protected Color placeholderForeground;
@@ -89,15 +84,13 @@ public class FlatTextFieldUI
 		super.installDefaults();
 
 		String prefix = getPropertyPrefix();
-		arc = UIManager.getInt( "TextComponent.arc" );
-		focusWidth = UIManager.getInt( "Component.focusWidth" );
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		placeholderForeground = UIManager.getColor( prefix + ".placeholderForeground" );
 
-		LookAndFeel.installProperty( getComponent(), "opaque", focusWidth == 0 );
+		LookAndFeel.installProperty( getComponent(), "opaque", false );
 
-		MigLayoutVisualPadding.install( getComponent(), focusWidth );
+		MigLayoutVisualPadding.install( getComponent() );
 	}
 
 	@Override
@@ -133,14 +126,25 @@ public class FlatTextFieldUI
 	@Override
 	protected void propertyChange( PropertyChangeEvent e ) {
 		super.propertyChange( e );
+		propertyChange( getComponent(), e );
+	}
 
-		if( FlatClientProperties.PLACEHOLDER_TEXT.equals( e.getPropertyName() ) )
-			getComponent().repaint();
+	static void propertyChange( JTextComponent c, PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case FlatClientProperties.PLACEHOLDER_TEXT:
+			case FlatClientProperties.COMPONENT_ROUND_RECT:
+				c.repaint();
+				break;
+
+			case FlatClientProperties.MINIMUM_WIDTH:
+				c.revalidate();
+				break;
+		}
 	}
 
 	@Override
 	protected void paintSafely( Graphics g ) {
-		paintBackground( g, getComponent(), focusWidth, arc, isIntelliJTheme );
+		paintBackground( g, getComponent(), isIntelliJTheme );
 		paintPlaceholder( g, getComponent(), placeholderForeground );
 		super.paintSafely( g );
 	}
@@ -150,19 +154,20 @@ public class FlatTextFieldUI
 		// background is painted elsewhere
 	}
 
-	static void paintBackground( Graphics g, JTextComponent c, int focusWidth, int arc, boolean isIntelliJTheme ) {
-		Border border = c.getBorder();
-
+	static void paintBackground( Graphics g, JTextComponent c, boolean isIntelliJTheme ) {
 		// do not paint background if:
 		//   - not opaque and
 		//   - border is not a flat border and
 		//   - opaque was explicitly set (to false)
 		// (same behaviour as in AquaTextFieldUI)
-		if( !c.isOpaque() && !(border instanceof FlatBorder) && FlatUIUtils.hasOpaqueBeenExplicitlySet( c ) )
+		if( !c.isOpaque() && FlatUIUtils.getOutsideFlatBorder( c ) == null && FlatUIUtils.hasOpaqueBeenExplicitlySet( c ) )
 			return;
 
+		float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
+		float arc = FlatUIUtils.getBorderArc( c );
+
 		// fill background if opaque to avoid garbage if user sets opaque to true
-		if( c.isOpaque() && focusWidth > 0 )
+		if( c.isOpaque() && (focusWidth > 0 || arc > 0) )
 			FlatUIUtils.paintParentBackground( g, c );
 
 		// paint background
@@ -170,16 +175,13 @@ public class FlatTextFieldUI
 		try {
 			FlatUIUtils.setRenderingHints( g2 );
 
-			float fFocusWidth = (border instanceof FlatBorder) ? scale( (float) focusWidth ) : 0;
-			float fArc = (border instanceof FlatTextBorder) ? scale( (float) arc ) : 0;
-
 			Color background = c.getBackground();
 			g2.setColor( !(background instanceof UIResource)
 				? background
 				: (isIntelliJTheme && (!c.isEnabled() || !c.isEditable())
 					? FlatUIUtils.getParentBackground( c )
 					: background) );
-			FlatUIUtils.paintComponentBackground( g2, 0, 0, c.getWidth(), c.getHeight(), fFocusWidth, fArc );
+			FlatUIUtils.paintComponentBackground( g2, 0, 0, c.getWidth(), c.getHeight(), focusWidth, arc );
 		} finally {
 			g2.dispose();
 		}
@@ -212,28 +214,29 @@ public class FlatTextFieldUI
 
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
-		return applyMinimumWidth( super.getPreferredSize( c ), c );
+		return applyMinimumWidth( c, super.getPreferredSize( c ), minimumWidth );
 	}
 
 	@Override
 	public Dimension getMinimumSize( JComponent c ) {
-		return applyMinimumWidth( super.getMinimumSize( c ), c );
+		return applyMinimumWidth( c, super.getMinimumSize( c ), minimumWidth );
 	}
 
-	private Dimension applyMinimumWidth( Dimension size, JComponent c ) {
+	static Dimension applyMinimumWidth( JComponent c, Dimension size, int minimumWidth ) {
 		// do not apply minimum width if JTextField.columns is set
 		if( c instanceof JTextField && ((JTextField)c).getColumns() > 0 )
 			return size;
 
+		// do not apply minimum width if used in combobox or spinner
 		Container parent = c.getParent();
 		if( parent instanceof JComboBox ||
 			parent instanceof JSpinner ||
 			(parent != null && parent.getParent() instanceof JSpinner) )
 		  return size;
 
-		int minimumWidth = FlatUIUtils.minimumWidth( getComponent(), this.minimumWidth );
-		int focusWidth = (c.getBorder() instanceof FlatBorder) ? this.focusWidth : 0;
-		size.width = Math.max( size.width, scale( minimumWidth + (focusWidth * 2) ) );
+		minimumWidth = FlatUIUtils.minimumWidth( c, minimumWidth );
+		float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
+		size.width = Math.max( size.width, scale( minimumWidth ) + Math.round( focusWidth * 2 ) );
 		return size;
 	}
 }

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

@@ -16,9 +16,9 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.beans.PropertyChangeEvent;
 import javax.swing.JComponent;
 import javax.swing.JEditorPane;
 import javax.swing.UIManager;
@@ -83,24 +83,20 @@ public class FlatTextPaneUI
 		getComponent().putClientProperty( JEditorPane.HONOR_DISPLAY_PROPERTIES, oldHonorDisplayProperties );
 	}
 
+	@Override
+	protected void propertyChange( PropertyChangeEvent e ) {
+		super.propertyChange( e );
+		FlatEditorPaneUI.propertyChange( getComponent(), e );
+	}
+
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
-		return applyMinimumWidth( super.getPreferredSize( c ) );
+		return FlatEditorPaneUI.applyMinimumWidth( c, super.getPreferredSize( c ), minimumWidth );
 	}
 
 	@Override
 	public Dimension getMinimumSize( JComponent c ) {
-		return applyMinimumWidth( super.getMinimumSize( c ) );
-	}
-
-	private Dimension applyMinimumWidth( Dimension size ) {
-		// Assume that text area is in a scroll pane (that displays the border)
-		// and subtract 1px border line width.
-		// Using "(scale( 1 ) * 2)" instead of "scale( 2 )" to deal with rounding
-		// issues. E.g. at scale factor 1.5 the first returns 4, but the second 3.
-		int minimumWidth = FlatUIUtils.minimumWidth( getComponent(), this.minimumWidth );
-		size.width = Math.max( size.width, scale( minimumWidth ) - (scale( 1 ) * 2) );
-		return size;
+		return FlatEditorPaneUI.applyMinimumWidth( c, super.getMinimumSize( c ), minimumWidth );
 	}
 
 	@Override

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

@@ -138,7 +138,7 @@ public class FlatToggleButtonUI
 			case BUTTON_TYPE:
 				if( BUTTON_TYPE_TAB.equals( e.getOldValue() ) || BUTTON_TYPE_TAB.equals( e.getNewValue() ) ) {
 					MigLayoutVisualPadding.uninstall( b );
-					MigLayoutVisualPadding.install( b, getFocusWidth( b ) );
+					MigLayoutVisualPadding.install( b );
 					b.revalidate();
 				}
 
@@ -212,9 +212,4 @@ public class FlatToggleButtonUI
 
 		return super.getForeground( c );
 	}
-
-	@Override
-	protected int getFocusWidth( JComponent c ) {
-		return isTabButton( c ) ? 0 : super.getFocusWidth( c );
-	}
 }

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

@@ -27,6 +27,7 @@ import javax.swing.JComponent;
 import javax.swing.JToolTip;
 import javax.swing.SwingUtilities;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.plaf.basic.BasicToolTipUI;
 import com.formdev.flatlaf.util.StringUtils;
 
@@ -102,7 +103,7 @@ public class FlatToolTipUI
 			for( String line : lines )
 				width = Math.max( width, SwingUtilities.computeStringWidth( fm, line ) );
 
-			return new Dimension( insets.left + width + insets.right, insets.top + height + insets.bottom );
+			return new Dimension( insets.left + width + insets.right + 6, insets.top + height + insets.bottom );
 		} else
 			return super.getPreferredSize( c );
 	}
@@ -118,8 +119,8 @@ public class FlatToolTipUI
 
 			List<String> lines = StringUtils.split( ((JToolTip)c).getTipText(), '\n' );
 
-			int x = insets.left;
-			int x2 = c.getWidth() - insets.right;
+			int x = insets.left + 3;
+			int x2 = c.getWidth() - insets.right - 3;
 			int y = insets.top - fm.getDescent();
 			int lineHeight = fm.getHeight();
 			JComponent comp = ((JToolTip)c).getComponent();
@@ -134,6 +135,6 @@ public class FlatToolTipUI
 
 	private boolean isMultiLine( JComponent c ) {
 		String text = ((JToolTip)c).getTipText();
-		return c.getClientProperty( "html" ) == null && text != null && text.indexOf( '\n' ) >= 0;
+		return c.getClientProperty( BasicHTML.propertyKey ) == null && text != null && text.indexOf( '\n' ) >= 0;
 	}
 }

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

@@ -39,9 +39,12 @@ import java.util.function.Consumer;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
+import javax.swing.border.Border;
+import javax.swing.border.CompoundBorder;
 import javax.swing.plaf.UIResource;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.util.DerivedColor;
+import com.formdev.flatlaf.util.Graphics2DProxy;
 import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.JavaCompatibility;
 import com.formdev.flatlaf.util.UIScale;
@@ -141,6 +144,47 @@ public class FlatUIUtils
 		return (KeyboardFocusManager.getCurrentKeyboardFocusManager().getPermanentFocusOwner() == c);
 	}
 
+	public static boolean isRoundRect( Component c ) {
+		return c instanceof JComponent && FlatClientProperties.clientPropertyBoolean(
+			(JComponent) c, FlatClientProperties.COMPONENT_ROUND_RECT, false );
+	}
+
+	/**
+	 * Returns the scaled thickness of the outer focus border for the given component.
+	 */
+	public static float getBorderFocusWidth( JComponent c ) {
+		FlatBorder border = getOutsideFlatBorder( c );
+		return (border != null)
+			? UIScale.scale( (float) border.getFocusWidth( c ) )
+			: 0;
+	}
+
+	/**
+	 * Returns the scaled arc diameter of the border for the given component.
+	 */
+	public static float getBorderArc( JComponent c ) {
+		FlatBorder border = getOutsideFlatBorder( c );
+		return (border != null)
+			? UIScale.scale( (float) border.getArc( c ) )
+			: 0;
+	}
+
+	public static boolean hasRoundBorder( JComponent c ) {
+		return getBorderArc( c ) >= c.getHeight();
+	}
+
+	public static FlatBorder getOutsideFlatBorder( JComponent c ) {
+		Border border = c.getBorder();
+		for(;;) {
+			if( border instanceof FlatBorder )
+				return (FlatBorder) border;
+			else if( border instanceof CompoundBorder )
+				border = ((CompoundBorder)border).getOutsideBorder();
+			else
+				return null;
+		}
+	}
+
 	/**
 	 * Sets rendering hints used for painting.
 	 */
@@ -150,10 +194,10 @@ public class FlatUIUtils
 			MAC_USE_QUARTZ ? RenderingHints.VALUE_STROKE_PURE : RenderingHints.VALUE_STROKE_NORMALIZE );
 	}
 
-	public static void setColor( Graphics g, Color color, Color baseColor ) {
-		if( color instanceof DerivedColor )
-			color = ((DerivedColor)color).derive( baseColor );
-		g.setColor( color );
+	public static Color deriveColor( Color color, Color baseColor ) {
+		return (color instanceof DerivedColor)
+			? ((DerivedColor)color).derive( baseColor )
+			: color;
 	}
 
 	/**
@@ -194,14 +238,9 @@ public class FlatUIUtils
 		if( arc > 0 && arc < UIScale.scale( 10 ) )
 			outerArc -= UIScale.scale( 2f );
 
-		if( outerArc < 0 )
-			outerArc = 0;
-		if( innerArc < 0 )
-			innerArc = 0;
-
 		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
-		path.append( new RoundRectangle2D.Float( x, y, width, height, outerArc, outerArc ), false );
-		path.append( new RoundRectangle2D.Float( x + ow, y + ow, width - (ow * 2), height - (ow * 2), innerArc, innerArc ), false );
+		path.append( createComponentRectangle( x, y, width, height, outerArc ), false );
+		path.append( createComponentRectangle( x + ow, y + ow, width - (ow * 2), height - (ow * 2), innerArc ), false );
 		g.fill( path );
 	}
 
@@ -235,19 +274,16 @@ public class FlatUIUtils
 	private static void paintComponentBorderImpl( Graphics2D g, int x, int y, int width, int height,
 		float focusWidth, float lineWidth, float arc )
 	{
+		float x1 = x + focusWidth;
+		float y1 = y + focusWidth;
+		float width1 = width - focusWidth * 2;
+		float height1 = height - focusWidth * 2;
 		float arc2 = arc - (lineWidth * 2);
 
-		if( arc < 0 )
-			arc = 0;
-		if( arc2 < 0 )
-			arc2 = 0;
-
-		RoundRectangle2D.Float r1 = new RoundRectangle2D.Float(
-			x + focusWidth, y + focusWidth,
-			width - focusWidth * 2, height - focusWidth * 2, arc, arc );
-		RoundRectangle2D.Float r2 = new RoundRectangle2D.Float(
-			r1.x + lineWidth, r1.y + lineWidth,
-			r1.width - lineWidth * 2, r1.height - lineWidth * 2, arc2, arc2 );
+		Shape r1 = createComponentRectangle( x1, y1, width1, height1, arc );
+		Shape r2 = createComponentRectangle(
+			x1 + lineWidth, y1 + lineWidth,
+			width1 - lineWidth * 2, height1 - lineWidth * 2, arc2 );
 
 		Path2D border = new Path2D.Float( Path2D.WIND_EVEN_ODD );
 		border.append( r1, false );
@@ -285,12 +321,21 @@ public class FlatUIUtils
 	private static void paintComponentBackgroundImpl( Graphics2D g, int x, int y, int width, int height,
 		float focusWidth, float arc )
 	{
-		if( arc < 0 )
-			arc = 0;
-
-		g.fill( new RoundRectangle2D.Float(
+		g.fill( createComponentRectangle(
 			x + focusWidth, y + focusWidth,
-			width - focusWidth * 2, height - focusWidth * 2, arc, arc ) );
+			width - focusWidth * 2, height - focusWidth * 2, arc ) );
+	}
+
+	/**
+	 * Creates a (rounded) rectangle used to paint components (border, background, etc).
+	 * The given arc diameter is limited to min(width,height).
+	 */
+	public static Shape createComponentRectangle( float x, float y, float w, float h, float arc ) {
+		if( arc <= 0 )
+			return new Rectangle2D.Float( x, y, w, h );
+
+		arc = Math.min( arc, Math.min( w, h ) );
+		return new RoundRectangle2D.Float( x, y, w, h, arc, arc );
 	}
 
 	/**
@@ -359,14 +404,12 @@ public class FlatUIUtils
 		if( arcTopLeft <= 0 && arcTopRight <= 0 && arcBottomLeft <= 0 && arcBottomRight <= 0 )
 			return new Rectangle2D.Float( x, y, width, height );
 
-		if( arcTopLeft < 0 )
-			arcTopLeft = 0;
-		if( arcTopRight < 0 )
-			arcTopRight = 0;
-		if( arcBottomLeft < 0 )
-			arcBottomLeft = 0;
-		if( arcBottomRight < 0 )
-			arcBottomRight = 0;
+		// limit arcs to min(width,height)
+		float maxArc = Math.min( width, height ) / 2;
+		arcTopLeft = (arcTopLeft > 0) ? Math.min( arcTopLeft, maxArc ) : 0;
+		arcTopRight = (arcTopRight > 0) ? Math.min( arcTopRight, maxArc ) : 0;
+		arcBottomLeft = (arcBottomLeft > 0) ? Math.min( arcBottomLeft, maxArc ) : 0;
+		arcBottomRight = (arcBottomRight > 0) ? Math.min( arcBottomRight, maxArc ) : 0;
 
 		float x2 = x + width;
 		float y2 = y + height;
@@ -427,6 +470,23 @@ public class FlatUIUtils
 	public static void drawStringUnderlineCharAt( JComponent c, Graphics g,
 		String text, int underlinedIndex, int x, int y )
 	{
+		// scale underline height if necessary
+		if( underlinedIndex >= 0 && UIScale.getUserScaleFactor() > 1 ) {
+			g = new Graphics2DProxy( (Graphics2D) g ) {
+				@Override
+				public void fillRect( int x, int y, int width, int height ) {
+					if( height == 1 ) {
+						// scale height and correct y position
+						// (using 0.9f so that underline height is 1 at scale factor 1.5x)
+						height = Math.round( UIScale.scale( 0.9f ) );
+						y += height - 1;
+					}
+
+					super.fillRect( x, y, width, height );
+				}
+			};
+		}
+
 		JavaCompatibility.drawStringUnderlineCharAt( c, g, text, underlinedIndex, x, y );
 	}
 

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

@@ -69,14 +69,17 @@ public class MigLayoutVisualPadding
 	/**
 	 * Convenience method that checks whether component border is a FlatBorder.
 	 */
-	public static void install( JComponent c, int focusWidth ) {
+	public static void install( JComponent c ) {
 		if( !migLayoutAvailable )
 			return;
 
 		install( c, c2 -> {
-			return (c2.getBorder() instanceof FlatBorder)
-				? new Insets( focusWidth, focusWidth, focusWidth, focusWidth )
-				: null;
+			FlatBorder border = FlatUIUtils.getOutsideFlatBorder( c2 );
+			if( border != null ) {
+				int focusWidth = border.getFocusWidth( c2 );
+				return new Insets( focusWidth, focusWidth, focusWidth, focusWidth );
+			} else
+				return null;
 		}, "border" );
 	}
 

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

@@ -49,20 +49,26 @@ public class ColorFunctions
 		void apply( float[] hsl );
 	}
 
-	//---- class Lighten ------------------------------------------------------
+	//---- class HSLIncreaseDecrease ------------------------------------------
 
 	/**
-	 * Increase the lightness of a color in the HSL color space by an absolute
-	 * or relative amount.
+	 * Increase or decrease hue, saturation or luminance of a color in the HSL color space
+	 * by an absolute or relative amount.
 	 */
-	public static class Lighten
+	public static class HSLIncreaseDecrease
 		implements ColorFunction
 	{
-		private final float amount;
-		private final boolean relative;
-		private final boolean autoInverse;
+		public final int hslIndex;
+		public final boolean increase;
+		public final float amount;
+		public final boolean relative;
+		public final boolean autoInverse;
 
-		public Lighten( float amount, boolean relative, boolean autoInverse ) {
+		public HSLIncreaseDecrease( int hslIndex, boolean increase,
+			float amount, boolean relative, boolean autoInverse )
+		{
+			this.hslIndex = hslIndex;
+			this.increase = increase;
 			this.amount = amount;
 			this.relative = relative;
 			this.autoInverse = autoInverse;
@@ -70,33 +76,17 @@ public class ColorFunctions
 
 		@Override
 		public void apply( float[] hsl ) {
-			float amount2 = autoInverse && shouldInverse( hsl ) ? -amount : amount;
-			hsl[2] = clamp( relative
-				? (hsl[2] * ((100 + amount2) / 100))
-				: (hsl[2] + amount2) );
+			float amount2 = increase ? amount : -amount;
+			amount2 = autoInverse && shouldInverse( hsl ) ? -amount2 : amount2;
+			hsl[hslIndex] = clamp( relative
+				? (hsl[hslIndex] * ((100 + amount2) / 100))
+				: (hsl[hslIndex] + amount2) );
 		}
 
 		protected boolean shouldInverse( float[] hsl ) {
-			return hsl[2] >= 50;
-		}
-	}
-
-	//---- class Darken -------------------------------------------------------
-
-	/**
-	 * Decrease the lightness of a color in the HSL color space by an absolute
-	 * or relative amount.
-	 */
-	public static class Darken
-		extends Lighten
-	{
-		public Darken( float amount, boolean relative, boolean autoInverse ) {
-			super( -amount, relative, autoInverse );
-		}
-
-		@Override
-		protected boolean shouldInverse( float[] hsl ) {
-			return hsl[2] < 50;
+			return increase
+				? hsl[hslIndex] >= 50
+				: hsl[hslIndex] < 50;
 		}
 	}
 }

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

@@ -32,12 +32,31 @@ public class DerivedColor
 {
 	private final ColorFunction[] functions;
 
+	private boolean hasBaseOfDefaultColor;
+	private int baseOfDefaultColorRGB;
+
 	public DerivedColor( Color defaultColor, ColorFunction... functions ) {
 		super( (defaultColor != null) ? defaultColor : Color.red );
 		this.functions = functions;
 	}
 
 	public Color derive( Color baseColor ) {
-		return ColorFunctions.applyFunctions( baseColor, functions );
+		if( (hasBaseOfDefaultColor && baseOfDefaultColorRGB == baseColor.getRGB()) || baseColor == this )
+			return this; // return default color
+
+		Color result = ColorFunctions.applyFunctions( baseColor, functions );
+
+		// if the result is equal to the default color, then the original base color
+		// was passed and we can cache this to avoid color calculations
+		if( !hasBaseOfDefaultColor && result.getRGB() == this.getRGB() ) {
+			hasBaseOfDefaultColor = true;
+			baseOfDefaultColorRGB = baseColor.getRGB();
+		}
+
+		return result;
+	}
+
+	public ColorFunction[] getFunctions() {
+		return functions;
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/util/Graphics2DProxy.java

@@ -0,0 +1,479 @@
+/*
+ * Copyright 2020 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 java.awt.Color;
+import java.awt.Composite;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.Image;
+import java.awt.Paint;
+import java.awt.Polygon;
+import java.awt.Rectangle;
+import java.awt.RenderingHints;
+import java.awt.RenderingHints.Key;
+import java.awt.Shape;
+import java.awt.Stroke;
+import java.awt.font.FontRenderContext;
+import java.awt.font.GlyphVector;
+import java.awt.geom.AffineTransform;
+import java.awt.image.BufferedImage;
+import java.awt.image.BufferedImageOp;
+import java.awt.image.ImageObserver;
+import java.awt.image.RenderedImage;
+import java.awt.image.renderable.RenderableImage;
+import java.text.AttributedCharacterIterator;
+import java.util.Map;
+
+/**
+ * A proxy for {@link Graphics2D}.
+ *
+ * @author Karl Tauber
+ */
+public class Graphics2DProxy
+	extends Graphics2D
+{
+	private final Graphics2D delegate;
+
+	public Graphics2DProxy( Graphics2D delegate ) {
+		this.delegate = delegate;
+	}
+
+	@Override
+	public Graphics create() {
+		return delegate.create();
+	}
+
+	@Override
+	public Graphics create( int x, int y, int width, int height ) {
+		return delegate.create( x, y, width, height );
+	}
+
+	@Override
+	public Color getColor() {
+		return delegate.getColor();
+	}
+
+	@Override
+	public void setColor( Color c ) {
+		delegate.setColor( c );
+	}
+
+	@Override
+	public void setPaintMode() {
+		delegate.setPaintMode();
+	}
+
+	@Override
+	public void setXORMode( Color c1 ) {
+		delegate.setXORMode( c1 );
+	}
+
+	@Override
+	public Font getFont() {
+		return delegate.getFont();
+	}
+
+	@Override
+	public void setFont( Font font ) {
+		delegate.setFont( font );
+	}
+
+	@Override
+	public FontMetrics getFontMetrics() {
+		return delegate.getFontMetrics();
+	}
+
+	@Override
+	public FontMetrics getFontMetrics( Font f ) {
+		return delegate.getFontMetrics( f );
+	}
+
+	@Override
+	public Rectangle getClipBounds() {
+		return delegate.getClipBounds();
+	}
+
+	@Override
+	public void clipRect( int x, int y, int width, int height ) {
+		delegate.clipRect( x, y, width, height );
+	}
+
+	@Override
+	public void setClip( int x, int y, int width, int height ) {
+		delegate.setClip( x, y, width, height );
+	}
+
+	@Override
+	public Shape getClip() {
+		return delegate.getClip();
+	}
+
+	@Override
+	public void setClip( Shape clip ) {
+		delegate.setClip( clip );
+	}
+
+	@Override
+	public void copyArea( int x, int y, int width, int height, int dx, int dy ) {
+		delegate.copyArea( x, y, width, height, dx, dy );
+	}
+
+	@Override
+	public void drawLine( int x1, int y1, int x2, int y2 ) {
+		delegate.drawLine( x1, y1, x2, y2 );
+	}
+
+	@Override
+	public void fillRect( int x, int y, int width, int height ) {
+		delegate.fillRect( x, y, width, height );
+	}
+
+	@Override
+	public void drawRect( int x, int y, int width, int height ) {
+		delegate.drawRect( x, y, width, height );
+	}
+
+	@Override
+	public void clearRect( int x, int y, int width, int height ) {
+		delegate.clearRect( x, y, width, height );
+	}
+
+	@Override
+	public void drawRoundRect( int x, int y, int width, int height, int arcWidth, int arcHeight ) {
+		delegate.drawRoundRect( x, y, width, height, arcWidth, arcHeight );
+	}
+
+	@Override
+	public void fillRoundRect( int x, int y, int width, int height, int arcWidth, int arcHeight ) {
+		delegate.fillRoundRect( x, y, width, height, arcWidth, arcHeight );
+	}
+
+	@Override
+	public void drawOval( int x, int y, int width, int height ) {
+		delegate.drawOval( x, y, width, height );
+	}
+
+	@Override
+	public void fillOval( int x, int y, int width, int height ) {
+		delegate.fillOval( x, y, width, height );
+	}
+
+	@Override
+	public void drawArc( int x, int y, int width, int height, int startAngle, int arcAngle ) {
+		delegate.drawArc( x, y, width, height, startAngle, arcAngle );
+	}
+
+	@Override
+	public void fillArc( int x, int y, int width, int height, int startAngle, int arcAngle ) {
+		delegate.fillArc( x, y, width, height, startAngle, arcAngle );
+	}
+
+	@Override
+	public void drawPolyline( int[] xPoints, int[] yPoints, int nPoints ) {
+		delegate.drawPolyline( xPoints, yPoints, nPoints );
+	}
+
+	@Override
+	public void drawPolygon( int[] xPoints, int[] yPoints, int nPoints ) {
+		delegate.drawPolygon( xPoints, yPoints, nPoints );
+	}
+
+	@Override
+	public void drawPolygon( Polygon p ) {
+		delegate.drawPolygon( p );
+	}
+
+	@Override
+	public void fillPolygon( int[] xPoints, int[] yPoints, int nPoints ) {
+		delegate.fillPolygon( xPoints, yPoints, nPoints );
+	}
+
+	@Override
+	public void fillPolygon( Polygon p ) {
+		delegate.fillPolygon( p );
+	}
+
+	@Override
+	public void drawChars( char[] data, int offset, int length, int x, int y ) {
+		delegate.drawChars( data, offset, length, x, y );
+	}
+
+	@Override
+	public void drawBytes( byte[] data, int offset, int length, int x, int y ) {
+		delegate.drawBytes( data, offset, length, x, y );
+	}
+
+	@Override
+	public boolean drawImage( Image img, int x, int y, ImageObserver observer ) {
+		return delegate.drawImage( img, x, y, observer );
+	}
+
+	@Override
+	public boolean drawImage( Image img, int x, int y, int width, int height, ImageObserver observer ) {
+		return delegate.drawImage( img, x, y, width, height, observer );
+	}
+
+	@Override
+	public boolean drawImage( Image img, int x, int y, Color bgcolor, ImageObserver observer ) {
+		return delegate.drawImage( img, x, y, bgcolor, observer );
+	}
+
+	@Override
+	public boolean drawImage( Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer ) {
+		return delegate.drawImage( img, x, y, width, height, bgcolor, observer );
+	}
+
+	@Override
+	public boolean drawImage( Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer ) {
+		return delegate.drawImage( img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, observer );
+	}
+
+	@Override
+	public boolean drawImage( Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver observer ) {
+		return delegate.drawImage( img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, bgcolor, observer );
+	}
+
+	@Override
+	public void dispose() {
+		delegate.dispose();
+	}
+
+	@Override
+	public void finalize() {
+		delegate.finalize();
+	}
+
+	@Override
+	public String toString() {
+		return delegate.toString();
+	}
+
+	@SuppressWarnings( "deprecation" )
+	@Override
+	public Rectangle getClipRect() {
+		return delegate.getClipRect();
+	}
+
+	@Override
+	public boolean hitClip( int x, int y, int width, int height ) {
+		return delegate.hitClip( x, y, width, height );
+	}
+
+	@Override
+	public Rectangle getClipBounds( Rectangle r ) {
+		return delegate.getClipBounds( r );
+	}
+
+	@Override
+	public void draw3DRect( int x, int y, int width, int height, boolean raised ) {
+		delegate.draw3DRect( x, y, width, height, raised );
+	}
+
+	@Override
+	public void fill3DRect( int x, int y, int width, int height, boolean raised ) {
+		delegate.fill3DRect( x, y, width, height, raised );
+	}
+
+	@Override
+	public void draw( Shape s ) {
+		delegate.draw( s );
+	}
+
+	@Override
+	public boolean drawImage( Image img, AffineTransform xform, ImageObserver obs ) {
+		return delegate.drawImage( img, xform, obs );
+	}
+
+	@Override
+	public void drawImage( BufferedImage img, BufferedImageOp op, int x, int y ) {
+		delegate.drawImage( img, op, x, y );
+	}
+
+	@Override
+	public void drawRenderedImage( RenderedImage img, AffineTransform xform ) {
+		delegate.drawRenderedImage( img, xform );
+	}
+
+	@Override
+	public void drawRenderableImage( RenderableImage img, AffineTransform xform ) {
+		delegate.drawRenderableImage( img, xform );
+	}
+
+	@Override
+	public void drawString( String str, int x, int y ) {
+		delegate.drawString( str, x, y );
+	}
+
+	@Override
+	public void drawString( String str, float x, float y ) {
+		delegate.drawString( str, x, y );
+	}
+
+	@Override
+	public void drawString( AttributedCharacterIterator iterator, int x, int y ) {
+		delegate.drawString( iterator, x, y );
+	}
+
+	@Override
+	public void drawString( AttributedCharacterIterator iterator, float x, float y ) {
+		delegate.drawString( iterator, x, y );
+	}
+
+	@Override
+	public void drawGlyphVector( GlyphVector g, float x, float y ) {
+		delegate.drawGlyphVector( g, x, y );
+	}
+
+	@Override
+	public void fill( Shape s ) {
+		delegate.fill( s );
+	}
+
+	@Override
+	public boolean hit( Rectangle rect, Shape s, boolean onStroke ) {
+		return delegate.hit( rect, s, onStroke );
+	}
+
+	@Override
+	public GraphicsConfiguration getDeviceConfiguration() {
+		return delegate.getDeviceConfiguration();
+	}
+
+	@Override
+	public void setComposite( Composite comp ) {
+		delegate.setComposite( comp );
+	}
+
+	@Override
+	public void setPaint( Paint paint ) {
+		delegate.setPaint( paint );
+	}
+
+	@Override
+	public void setStroke( Stroke s ) {
+		delegate.setStroke( s );
+	}
+
+	@Override
+	public void setRenderingHint( Key hintKey, Object hintValue ) {
+		delegate.setRenderingHint( hintKey, hintValue );
+	}
+
+	@Override
+	public Object getRenderingHint( Key hintKey ) {
+		return delegate.getRenderingHint( hintKey );
+	}
+
+	@Override
+	public void setRenderingHints( Map<?, ?> hints ) {
+		delegate.setRenderingHints( hints );
+	}
+
+	@Override
+	public void addRenderingHints( Map<?, ?> hints ) {
+		delegate.addRenderingHints( hints );
+	}
+
+	@Override
+	public RenderingHints getRenderingHints() {
+		return delegate.getRenderingHints();
+	}
+
+	@Override
+	public void translate( int x, int y ) {
+		delegate.translate( x, y );
+	}
+
+	@Override
+	public void translate( double tx, double ty ) {
+		delegate.translate( tx, ty );
+	}
+
+	@Override
+	public void rotate( double theta ) {
+		delegate.rotate( theta );
+	}
+
+	@Override
+	public void rotate( double theta, double x, double y ) {
+		delegate.rotate( theta, x, y );
+	}
+
+	@Override
+	public void scale( double sx, double sy ) {
+		delegate.scale( sx, sy );
+	}
+
+	@Override
+	public void shear( double shx, double shy ) {
+		delegate.shear( shx, shy );
+	}
+
+	@Override
+	public void transform( AffineTransform Tx ) {
+		delegate.transform( Tx );
+	}
+
+	@Override
+	public void setTransform( AffineTransform Tx ) {
+		delegate.setTransform( Tx );
+	}
+
+	@Override
+	public AffineTransform getTransform() {
+		return delegate.getTransform();
+	}
+
+	@Override
+	public Paint getPaint() {
+		return delegate.getPaint();
+	}
+
+	@Override
+	public Composite getComposite() {
+		return delegate.getComposite();
+	}
+
+	@Override
+	public void setBackground( Color color ) {
+		delegate.setBackground( color );
+	}
+
+	@Override
+	public Color getBackground() {
+		return delegate.getBackground();
+	}
+
+	@Override
+	public Stroke getStroke() {
+		return delegate.getStroke();
+	}
+
+	@Override
+	public void clip( Shape s ) {
+		delegate.clip( s );
+	}
+
+	@Override
+	public FontRenderContext getFontRenderContext() {
+		return delegate.getFontRenderContext();
+	}
+}

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

@@ -19,6 +19,12 @@ public class GrayFilter
 	private final int origContrast;
 	private final int origBrightness;
 
+	public static GrayFilter createDisabledIconFilter( boolean dark ) {
+		return dark
+			? new GrayFilter( -20, -70, 100 )
+			: new GrayFilter(  25, -25, 100 );
+	}
+
 	/**
 	 * @param brightness in range [-100..100] where 0 has no effect
 	 * @param contrast in range [-100..100] where 0 has no effect

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

@@ -17,6 +17,8 @@
 package com.formdev.flatlaf.util;
 
 import java.awt.Image;
+import java.util.Collections;
+import java.util.List;
 import java.util.function.Function;
 
 /**
@@ -41,4 +43,12 @@ public class MultiResolutionImageSupport
 	public static Image map( Image image, Function<Image, Image> mapper ) {
 		return mapper.apply( image );
 	}
+
+	public static Image getResolutionVariant( Image image, int destImageWidth, int destImageHeight ) {
+		return image;
+	}
+
+	public static List<Image> getResolutionVariants( Image image ) {
+		return Collections.singletonList( image );
+	}
 }

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

@@ -0,0 +1,172 @@
+/*
+ * Copyright 2020 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 java.awt.Component;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.RenderingHints;
+import java.awt.image.BufferedImage;
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+
+/**
+ * Scales the given image icon using the system and user scale factors and
+ * paints the icon at system scale factor 1x. This gives best scaling quality.
+ * If the given image icon supports multiple resolutions, the best resolution
+ * variant is used. The last scaled image is cached for faster repainting.
+ *
+ * @author Karl Tauber
+ */
+public class ScaledImageIcon
+	implements Icon
+{
+	private final ImageIcon imageIcon;
+
+	private double lastSystemScaleFactor;
+	private float lastUserScaleFactor;
+	private Image lastImage;
+
+	public ScaledImageIcon( ImageIcon imageIcon ) {
+		this.imageIcon = imageIcon;
+	}
+
+	@Override
+	public int getIconWidth() {
+		return UIScale.scale( imageIcon.getIconWidth() );
+	}
+
+	@Override
+	public int getIconHeight() {
+		return UIScale.scale( imageIcon.getIconHeight() );
+	}
+
+	@Override
+	public void paintIcon( Component c, Graphics g, int x, int y ) {
+/*debug
+		g.setColor( Color.red );
+		g.drawRect( x, y, getIconWidth(), getIconHeight() );
+debug*/
+
+		// scale factor
+		double systemScaleFactor = UIScale.getSystemScaleFactor( (Graphics2D) g );
+		float userScaleFactor = UIScale.getUserScaleFactor();
+		double scaleFactor = systemScaleFactor * userScaleFactor;
+
+		// paint input image icon if not necessary to scale
+		if( scaleFactor == 1 ) {
+			imageIcon.paintIcon( c, g, x, y );
+			return;
+		}
+
+		// paint cached scaled icon
+		if( systemScaleFactor == lastSystemScaleFactor &&
+			userScaleFactor == lastUserScaleFactor &&
+			lastImage != null )
+		{
+			paintLastImage( g, x, y );
+			return;
+		}
+
+		// destination image size
+		int destImageWidth = (int) Math.round( imageIcon.getIconWidth() * scaleFactor );
+		int destImageHeight = (int) Math.round( imageIcon.getIconHeight() * scaleFactor );
+
+		// get resolution variant of image if it is a multi-resolution image
+		Image image = MultiResolutionImageSupport.getResolutionVariant(
+			imageIcon.getImage(), destImageWidth, destImageHeight );
+
+		// size of image
+		int imageWidth = image.getWidth( null );
+		int imageHeight = image.getHeight( null );
+
+		// scale image if necessary to destination size
+		if( imageWidth != destImageWidth || imageHeight != destImageHeight ) {
+			// determine scaling method; default is "quality"
+			Object scalingInterpolation = RenderingHints.VALUE_INTERPOLATION_BICUBIC;
+			float imageScaleFactor = (float) destImageWidth / (float) imageWidth;
+			if( ((int) imageScaleFactor) == imageScaleFactor &&
+				imageScaleFactor > 1f &&
+				imageWidth <= 16 &&
+				imageHeight <= 16 )
+			{
+				// use "speed" scaling for small icons if the scale factor is an integer
+				// to avoid blurred icons
+				scalingInterpolation = RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR;
+			}
+
+			// scale image
+			BufferedImage bufferedImage = image2bufferedImage( image );
+			image = scaleImage( bufferedImage, destImageWidth, destImageHeight, scalingInterpolation );
+		}
+
+		// cache image
+		lastSystemScaleFactor = systemScaleFactor;
+		lastUserScaleFactor = userScaleFactor;
+		lastImage = image;
+
+		// paint image
+		paintLastImage( g, x, y );
+	}
+
+	private void paintLastImage( Graphics g, int x, int y ) {
+		if( lastSystemScaleFactor > 1 ) {
+			HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, 100, 100, // width and height are not used
+				(g2, x2, y2, width2, height2, scaleFactor2) -> {
+					g2.drawImage( lastImage, x2, y2, null );
+				} );
+		} else
+			g.drawImage( lastImage, x, y, null );
+	}
+
+	/**
+	 * Scales the given image to the target dimensions.
+	 *
+	 * This is the same what imgscalr library (https://github.com/rkalla/imgscalr)
+	 * would do when invoking Scalr.resize().
+	 */
+	private BufferedImage scaleImage( BufferedImage image, int targetWidth, int targetHeight,
+		Object scalingInterpolation )
+	{
+		BufferedImage bufferedImage = new BufferedImage( targetWidth, targetHeight, BufferedImage.TYPE_INT_ARGB );
+		Graphics2D g = bufferedImage.createGraphics();
+		try {
+			g.setRenderingHint( RenderingHints.KEY_INTERPOLATION, scalingInterpolation );
+			g.drawImage( image, 0, 0, targetWidth, targetHeight, null );
+		} finally {
+			g.dispose();
+		}
+		return bufferedImage;
+
+	}
+
+	private BufferedImage image2bufferedImage( Image image ) {
+		if( image instanceof BufferedImage )
+			return (BufferedImage) image;
+
+		BufferedImage bufferedImage = new BufferedImage( image.getWidth( null ),
+			image.getHeight( null ), BufferedImage.TYPE_INT_ARGB );
+		Graphics2D g = bufferedImage.createGraphics();
+		try {
+			g.drawImage( image, 0, 0, null );
+		} finally {
+			g.dispose();
+		}
+		return bufferedImage;
+	}
+}

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

@@ -33,6 +33,7 @@ public class SystemInfo
 
 	// OS versions
 	public static final boolean IS_MAC_OS_10_11_EL_CAPITAN_OR_LATER;
+	public static final boolean IS_MAC_OS_10_15_CATALINA_OR_LATER;
 
 	// Java versions
 	public static final boolean IS_JAVA_9_OR_LATER;
@@ -53,6 +54,7 @@ public class SystemInfo
 		// OS versions
 		long osVersion = scanVersion( System.getProperty( "os.version" ) );
 		IS_MAC_OS_10_11_EL_CAPITAN_OR_LATER = (IS_MAC && osVersion >= toVersion( 10, 11, 0, 0 ));
+		IS_MAC_OS_10_15_CATALINA_OR_LATER = (IS_MAC && osVersion >= toVersion( 10, 15, 0, 0 ));
 
 		// Java versions
 		long javaVersion = scanVersion( System.getProperty( "java.version" ) );

flatlaf-core/src/main/java9/com/formdev/flatlaf/util/MultiResolutionImageSupport.java

@@ -21,6 +21,7 @@ import java.awt.image.AbstractMultiResolutionImage;
 import java.awt.image.BaseMultiResolutionImage;
 import java.awt.image.MultiResolutionImage;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.IdentityHashMap;
 import java.util.List;
 import java.util.function.Function;
@@ -51,6 +52,18 @@ public class MultiResolutionImageSupport
 			: mapper.apply( image );
 	}
 
+	public static Image getResolutionVariant( Image image, int destImageWidth, int destImageHeight ) {
+		return (image instanceof MultiResolutionImage)
+			? ((MultiResolutionImage)image).getResolutionVariant( destImageWidth, destImageHeight )
+			: image;
+	}
+
+	public static List<Image> getResolutionVariants( Image image ) {
+		return (image instanceof MultiResolutionImage)
+			? ((MultiResolutionImage)image).getResolutionVariants()
+			: Collections.singletonList( image );
+	}
+
 	//---- class MappedMultiResolutionImage -----------------------------------
 
 	private static class MappedMultiResolutionImage

flatlaf-core/src/main/module-info/module-info.java

@@ -26,5 +26,7 @@ module com.formdev.flatlaf {
 	exports com.formdev.flatlaf.ui;
 	exports com.formdev.flatlaf.util;
 
+	opens com.formdev.flatlaf.resources;
+
 	uses com.formdev.flatlaf.FlatDefaultsAddon;
 }

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

@@ -27,6 +27,7 @@ Button.default.boldText=true
 
 Component.focusWidth=2
 Component.innerFocusWidth=0
+Component.innerOutlineWidth=0
 Component.arrowType=triangle
 
 

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

@@ -29,6 +29,9 @@
 @disabledText=#777777
 @textComponentBackground=#45494A
 @menuBackground=darken(@background,5%)
+@menuHoverBackground=lighten(@menuBackground,10%)
+@menuCheckBackground=lighten(@menuBackground,10%)
+@menuCheckHoverBackground=lighten(@menuBackground,20%)
 @cellFocusColor=#000000
 @icon=#adadad
 
@@ -53,7 +56,7 @@
 *.disabledBackground=@background
 *.disabledForeground=@disabledText
 *.disabledText=@disabledText
-*.acceleratorForeground=#bbbbbb
+*.acceleratorForeground=darken(@foreground,15%)
 *.acceleratorSelectionForeground=@selectionForeground
 
 
@@ -69,8 +72,8 @@ controlDkShadow=lighten($controlShadow,10%)
 #---- Button ----
 
 Button.background=#4c5052
-Button.hoverBackground=lighten($Button.background,3%,derived autoInverse)
-Button.pressedBackground=lighten($Button.background,6%,derived autoInverse)
+Button.hoverBackground=lighten($Button.background,3%,derived)
+Button.pressedBackground=lighten($Button.background,6%,derived)
 
 Button.borderColor=#5e6060
 Button.disabledBorderColor=#5e6060
@@ -79,16 +82,16 @@ Button.hoverBorderColor=$Button.focusedBorderColor
 
 Button.default.background=#365880
 Button.default.foreground=#bbbbbb
-Button.default.hoverBackground=lighten($Button.default.background,3%,derived autoInverse)
-Button.default.pressedBackground=lighten($Button.default.background,6%,derived autoInverse)
+Button.default.hoverBackground=lighten($Button.default.background,3%,derived)
+Button.default.pressedBackground=lighten($Button.default.background,6%,derived)
 Button.default.borderColor=#4c708c
 Button.default.hoverBorderColor=#537699
 Button.default.focusedBorderColor=#537699
 Button.default.focusColor=#43688c
 Button.default.boldText=true
 
-Button.toolbar.hoverBackground=lighten($Button.background,1%,derived autoInverse)
-Button.toolbar.pressedBackground=lighten($Button.background,4%,derived autoInverse)
+Button.toolbar.hoverBackground=lighten($Button.background,1%,derived)
+Button.toolbar.pressedBackground=lighten($Button.background,4%,derived)
 
 
 #---- CheckBox ----
@@ -101,8 +104,8 @@ CheckBox.icon.hoverBorderColor=$CheckBox.icon.focusedBorderColor
 CheckBox.icon.selectedFocusedBorderColor=#466D94
 CheckBox.icon.background=#43494A
 CheckBox.icon.disabledBackground=@background
-CheckBox.icon.hoverBackground=lighten($CheckBox.icon.background,3%,derived autoInverse)
-CheckBox.icon.pressedBackground=lighten($CheckBox.icon.background,6%,derived autoInverse)
+CheckBox.icon.hoverBackground=lighten($CheckBox.icon.background,3%,derived)
+CheckBox.icon.pressedBackground=lighten($CheckBox.icon.background,6%,derived)
 CheckBox.icon.selectedBackground=#43494A
 CheckBox.icon.checkmarkColor=#A7A7A7
 CheckBox.icon.disabledCheckmarkColor=#606060
@@ -127,6 +130,12 @@ Component.focusColor=#3d6185
 Component.linkColor=#589df6
 Component.grayFilter=-20,-70,100
 
+Component.error.borderColor=desaturate($Component.error.focusedBorderColor,25%)
+Component.error.focusedBorderColor=#8b3c3c
+Component.warning.borderColor=darken(desaturate($Component.warning.focusedBorderColor,20%),10%)
+Component.warning.focusedBorderColor=#ac7920
+Component.custom.borderColor=desaturate(#f00,50%,relative derived noAutoInverse)
+
 
 #---- Desktop ----
 
@@ -145,16 +154,19 @@ InternalFrame.activeTitleForeground=@foreground
 InternalFrame.inactiveTitleBackground=darken(@background,5%)
 InternalFrame.inactiveTitleForeground=@disabledText
 
-InternalFrame.activeBorderColor=lighten($Component.borderColor,10%)
-InternalFrame.inactiveBorderColor=$Component.borderColor
+InternalFrame.activeBorderColor=darken(@background,7%)
+InternalFrame.inactiveBorderColor=darken(@background,3%)
 
-InternalFrame.buttonHoverBackground=lighten($InternalFrame.activeTitleBackground,10%,derived autoInverse)
-InternalFrame.buttonPressedBackground=lighten($InternalFrame.activeTitleBackground,20%,derived autoInverse)
+InternalFrame.buttonHoverBackground=lighten($InternalFrame.activeTitleBackground,10%,derived)
+InternalFrame.buttonPressedBackground=lighten($InternalFrame.activeTitleBackground,20%,derived)
 InternalFrame.closeHoverBackground=lazy(Actions.Red)
 InternalFrame.closePressedBackground=darken(Actions.Red,10%,lazy)
 InternalFrame.closeHoverForeground=#fff
 InternalFrame.closePressedForeground=#fff
 
+InternalFrame.activeDropShadowOpacity=0.5
+InternalFrame.inactiveDropShadowOpacity=0.75
+
 
 #---- List ----
 
@@ -170,7 +182,7 @@ Menu.icon.disabledArrowColor=#606060
 #---- MenuBar ----
 
 MenuBar.borderColor=#515151
-MenuBar.hoverBackground=lighten($MenuBar.background,10%)
+MenuBar.hoverBackground=@menuHoverBackground
 
 
 #---- MenuItemCheckBox ----
@@ -184,6 +196,12 @@ MenuItemCheckBox.icon.disabledCheckmarkColor=#606060
 PasswordField.capsLockIconColor=#ffffff64
 
 
+#---- Popup ----
+
+Popup.dropShadowColor=#000
+Popup.dropShadowOpacity=0.25
+
+
 #---- PopupMenu ----
 
 PopupMenu.borderColor=#5e5e5e
@@ -199,10 +217,10 @@ ProgressBar.selectionBackground=@foreground
 
 #---- ScrollBar ----
 
-ScrollBar.track=#3F4244
-ScrollBar.thumb=lighten($ScrollBar.track,10%)
-ScrollBar.hoverTrackColor=lighten($ScrollBar.track,4%)
-ScrollBar.hoverThumbColor=lighten($ScrollBar.thumb,10%)
+ScrollBar.track=lighten(@background,1%,derived noAutoInverse)
+ScrollBar.thumb=lighten($ScrollBar.track,10%,derived noAutoInverse)
+ScrollBar.hoverTrackColor=lighten($ScrollBar.track,4%,derived noAutoInverse)
+ScrollBar.hoverThumbColor=lighten($ScrollBar.thumb,10%,derived noAutoInverse)
 
 
 #---- Separator ----
@@ -215,7 +233,7 @@ Separator.foreground=#515151
 Slider.trackColor=#646464
 Slider.thumbColor=#A6A6A6
 Slider.tickColor=#888888
-Slider.hoverColor=darken($Slider.thumbColor,15%,derived autoInverse)
+Slider.hoverColor=darken($Slider.thumbColor,15%,derived)
 Slider.disabledForeground=#4c5052
 
 
@@ -250,11 +268,11 @@ TableHeader.bottomSeparatorColor=$TableHeader.separatorColor
 
 #---- ToggleButton ----
 
-ToggleButton.selectedBackground=lighten($ToggleButton.background,10%,derived autoInverse)
+ToggleButton.selectedBackground=lighten($ToggleButton.background,10%,derived)
 ToggleButton.selectedForeground=@foreground
-ToggleButton.disabledSelectedBackground=lighten($ToggleButton.background,3%,derived autoInverse)
+ToggleButton.disabledSelectedBackground=lighten($ToggleButton.background,3%,derived)
 
-ToggleButton.toolbar.selectedBackground=lighten($ToggleButton.background,7%,derived autoInverse)
+ToggleButton.toolbar.selectedBackground=lighten($ToggleButton.background,7%,derived)
 
 
 #---- ToolTip ----

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

@@ -48,6 +48,7 @@ CheckBox.icon.selectedPressedBackground=#72A1D4
 
 Component.focusWidth=2
 Component.innerFocusWidth=0
+Component.innerOutlineWidth=0
 Component.arrowType=triangle
 
 

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

@@ -64,7 +64,7 @@ ViewportUI=com.formdev.flatlaf.ui.FlatViewportUI
 #---- variables ----
 
 @textComponentMargin=2,6,2,6
-@menuItemMargin=2,8,2,8
+@menuItemMargin=3,6,3,6
 
 
 #---- system colors ----
@@ -178,6 +178,8 @@ ColorChooser.swatchesDefaultRecentColor=$control
 
 ComboBox.border=com.formdev.flatlaf.ui.FlatRoundBorder
 ComboBox.padding=2,6,2,6
+ComboBox.minimumWidth=72
+ComboBox.editorColumns=0
 [mac]ComboBox.showPopupOnNavigation=true
 
 
@@ -185,6 +187,7 @@ ComboBox.padding=2,6,2,6
 
 Component.focusWidth=0
 Component.innerFocusWidth={float}0.5
+Component.innerOutlineWidth={float}1
 Component.arc=5
 Component.minimumWidth=64
 Component.arrowType=chevron
@@ -258,9 +261,16 @@ InternalFrame.buttonSize=24,24
 InternalFrame.closeIcon=com.formdev.flatlaf.icons.FlatInternalFrameCloseIcon
 InternalFrame.iconifyIcon=com.formdev.flatlaf.icons.FlatInternalFrameIconifyIcon
 InternalFrame.maximizeIcon=com.formdev.flatlaf.icons.FlatInternalFrameMaximizeIcon
-InternalFrame.minimizeIcon=com.formdev.flatlaf.icons.FlatInternalFrameMinimizeIcon
+InternalFrame.minimizeIcon=com.formdev.flatlaf.icons.FlatInternalFrameRestoreIcon
 InternalFrame.windowBindings=null
 
+# drop shadow
+InternalFrame.dropShadowPainted=true
+InternalFrame.activeDropShadowColor=null
+InternalFrame.activeDropShadowInsets=5,5,6,6
+InternalFrame.inactiveDropShadowColor=null
+InternalFrame.inactiveDropShadowInsets=3,3,4,4
+
 
 #---- InternalFrameTitlePane ----
 
@@ -299,7 +309,7 @@ Menu.background=@menuBackground
 
 MenuBar.border=com.formdev.flatlaf.ui.FlatMenuBarBorder
 MenuBar.background=@menuBackground
-MenuBar.itemMargins=3,3,3,3
+MenuBar.itemMargins=3,8,3,8
 
 
 #---- MenuItem ----
@@ -311,9 +321,23 @@ MenuItem.margin=@menuItemMargin
 MenuItem.opaque=false
 MenuItem.borderPainted=true
 MenuItem.background=@menuBackground
+MenuItem.checkBackground=@menuCheckBackground
+MenuItem.checkMargins=2,2,2,2
+MenuItem.minimumWidth=72
+MenuItem.minimumIconSize=16,16
+MenuItem.iconTextGap=6
+MenuItem.textAcceleratorGap=24
+MenuItem.textNoAcceleratorGap=6
+MenuItem.acceleratorArrowGap=2
 MenuItem.acceleratorDelimiter=-
 [mac]MenuItem.acceleratorDelimiter=
 
+# for MenuItem.selectionType=underline
+MenuItem.underlineSelectionBackground=@menuHoverBackground
+MenuItem.underlineSelectionCheckBackground=@menuCheckHoverBackground
+MenuItem.underlineSelectionColor=$TabbedPane.underlineColor
+MenuItem.underlineSelectionHeight=3
+
 
 #---- OptionPane ----
 
@@ -348,6 +372,12 @@ PasswordField.echoChar=\u2022
 PasswordField.capsLockIcon=com.formdev.flatlaf.icons.FlatCapsLockIcon
 
 
+#---- Popup ----
+
+Popup.dropShadowPainted=true
+Popup.dropShadowInsets=-4,-4,4,4
+
+
 #---- PopupMenu ----
 
 PopupMenu.border=com.formdev.flatlaf.ui.FlatPopupMenuBorder
@@ -396,12 +426,24 @@ RadioButtonMenuItem.background=@menuBackground
 #---- ScrollBar ----
 
 ScrollBar.width=10
+ScrollBar.trackInsets=0,0,0,0
+ScrollBar.thumbInsets=0,0,0,0
+ScrollBar.trackArc=0
+ScrollBar.thumbArc=0
+ScrollBar.hoverThumbWithTrack=false
 ScrollBar.showButtons=false
 ScrollBar.squareButtons=false
 ScrollBar.buttonArrowColor=$ComboBox.buttonArrowColor
 ScrollBar.buttonDisabledArrowColor=$ComboBox.buttonDisabledArrowColor
 ScrollBar.allowsAbsolutePositioning=true
 
+[mac]ScrollBar.thumbInsets=2,2,2,2
+[mac]ScrollBar.thumbArc=999
+[mac]ScrollBar.hoverThumbWithTrack=true
+
+[linux]ScrollBar.thumbInsets=2,2,2,2
+[linux]ScrollBar.thumbArc=999
+
 
 #---- ScrollPane ----
 
@@ -577,14 +619,6 @@ ToolBar.spacingBorder=$Button.toolbar.spacingInsets
 ToolTipManager.enableToolTipMode=activeApplication
 
 
-#---- ToolTip ----
-
-ToolTip.border=4,6,4,6,$Component.borderColor
-ToolTip.borderInactive=null
-ToolTip.backgroundInactive=$ToolTip.background
-ToolTip.foregroundInactive=@disabledText
-
-
 #---- Tree ----
 
 Tree.border=1,1,1,1

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

@@ -29,6 +29,9 @@
 @disabledText=#8C8C8C
 @textComponentBackground=#ffffff
 @menuBackground=#fff
+@menuHoverBackground=darken(@menuBackground,10%)
+@menuCheckBackground=darken(@menuBackground,10%)
+@menuCheckHoverBackground=darken(@menuBackground,20%)
 @cellFocusColor=#000000
 @icon=#afafaf
 
@@ -53,7 +56,7 @@
 *.disabledBackground=@background
 *.disabledForeground=@disabledText
 *.disabledText=@disabledText
-*.acceleratorForeground=#505050
+*.acceleratorForeground=lighten(@foreground,30%)
 *.acceleratorSelectionForeground=@selectionForeground
 
 
@@ -70,8 +73,8 @@ controlDkShadow=darken($controlShadow,15%)
 
 Button.background=#ffffff
 Button.focusedBackground=#e3f1fa
-Button.hoverBackground=darken($Button.background,3%,derived autoInverse)
-Button.pressedBackground=darken($Button.background,10%,derived autoInverse)
+Button.hoverBackground=darken($Button.background,3%,derived)
+Button.pressedBackground=darken($Button.background,10%,derived)
 
 Button.borderColor=$Component.borderColor
 Button.disabledBorderColor=$Component.disabledBorderColor
@@ -89,8 +92,8 @@ Button.default.focusedBorderColor=$Button.focusedBorderColor
 Button.default.focusColor=$Component.focusColor
 Button.default.borderWidth=2
 
-Button.toolbar.hoverBackground=darken($Button.background,12%,derived autoInverse)
-Button.toolbar.pressedBackground=darken($Button.background,15%,derived autoInverse)
+Button.toolbar.hoverBackground=darken($Button.background,12%,derived)
+Button.toolbar.pressedBackground=darken($Button.background,15%,derived)
 
 
 #---- CheckBox ----
@@ -129,6 +132,12 @@ Component.focusColor=#97c3f3
 Component.linkColor=#2470B3
 Component.grayFilter=25,-25,100
 
+Component.error.borderColor=lighten(desaturate($Component.error.focusedBorderColor,20%),25%)
+Component.error.focusedBorderColor=#e53e4d
+Component.warning.borderColor=lighten(saturate($Component.warning.focusedBorderColor,25%),20%)
+Component.warning.focusedBorderColor=#e2a53a
+Component.custom.borderColor=lighten(desaturate(#f00,20%,derived noAutoInverse),25%,derived noAutoInverse)
+
 
 #---- Desktop ----
 
@@ -155,13 +164,16 @@ InternalFrame.inactiveTitleForeground=@disabledText
 InternalFrame.activeBorderColor=darken($Component.borderColor,20%)
 InternalFrame.inactiveBorderColor=$Component.borderColor
 
-InternalFrame.buttonHoverBackground=darken($InternalFrame.activeTitleBackground,10%,derived autoInverse)
-InternalFrame.buttonPressedBackground=darken($InternalFrame.activeTitleBackground,20%,derived autoInverse)
+InternalFrame.buttonHoverBackground=darken($InternalFrame.activeTitleBackground,10%,derived)
+InternalFrame.buttonPressedBackground=darken($InternalFrame.activeTitleBackground,20%,derived)
 InternalFrame.closeHoverBackground=lazy(Actions.Red)
 InternalFrame.closePressedBackground=darken(Actions.Red,10%,lazy)
 InternalFrame.closeHoverForeground=#fff
 InternalFrame.closePressedForeground=#fff
 
+InternalFrame.activeDropShadowOpacity=0.25
+InternalFrame.inactiveDropShadowOpacity=0.5
+
 
 #---- List ----
 
@@ -177,7 +189,7 @@ Menu.icon.disabledArrowColor=#ABABAB
 #---- MenuBar ----
 
 MenuBar.borderColor=#cdcdcd
-MenuBar.hoverBackground=darken($MenuBar.background,10%)
+MenuBar.hoverBackground=@menuHoverBackground
 
 
 #---- MenuItemCheckBox ----
@@ -191,6 +203,12 @@ MenuItemCheckBox.icon.disabledCheckmarkColor=#ABABAB
 PasswordField.capsLockIconColor=#00000064
 
 
+#---- Popup ----
+
+Popup.dropShadowColor=#000
+Popup.dropShadowOpacity=0.15
+
+
 #---- PopupMenu ----
 
 PopupMenu.borderColor=#adadad
@@ -206,10 +224,10 @@ ProgressBar.selectionBackground=@foreground
 
 #---- ScrollBar ----
 
-ScrollBar.track=#F5F5F5
-ScrollBar.thumb=darken($ScrollBar.track,10%)
-ScrollBar.hoverTrackColor=darken($ScrollBar.track,3%)
-ScrollBar.hoverThumbColor=darken($ScrollBar.thumb,10%)
+ScrollBar.track=lighten(@background,1%,derived noAutoInverse)
+ScrollBar.thumb=darken($ScrollBar.track,10%,derived noAutoInverse)
+ScrollBar.hoverTrackColor=darken($ScrollBar.track,3%,derived noAutoInverse)
+ScrollBar.hoverThumbColor=darken($ScrollBar.thumb,10%,derived noAutoInverse)
 
 
 #---- Separator ----
@@ -222,7 +240,7 @@ Separator.foreground=#d1d1d1
 Slider.trackColor=#c4c4c4
 Slider.thumbColor=#6e6e6e
 Slider.tickColor=#888888
-Slider.hoverColor=lighten($Slider.thumbColor,15%,derived autoInverse)
+Slider.hoverColor=lighten($Slider.thumbColor,15%,derived)
 Slider.disabledForeground=#c0c0c0
 
 
@@ -257,15 +275,16 @@ TableHeader.bottomSeparatorColor=$TableHeader.separatorColor
 
 #---- ToggleButton ----
 
-ToggleButton.selectedBackground=darken($ToggleButton.background,20%,derived autoInverse)
+ToggleButton.selectedBackground=darken($ToggleButton.background,20%,derived)
 ToggleButton.selectedForeground=@foreground
-ToggleButton.disabledSelectedBackground=darken($ToggleButton.background,13%,derived autoInverse)
+ToggleButton.disabledSelectedBackground=darken($ToggleButton.background,13%,derived)
 
 ToggleButton.toolbar.selectedBackground=$ToggleButton.selectedBackground
 
 
 #---- ToolTip ----
 
+ToolTip.border=4,6,4,6,$InternalFrame.activeBorderColor
 ToolTip.background=#fafafa
 
 

flatlaf-core/src/main/resources/com/formdev/flatlaf/IntelliJTheme$ThemeLaf.properties

@@ -39,8 +39,8 @@ HelpButton.hoverBorderColor=null
 
 ToggleButton.startBackground=$ToggleButton.background
 ToggleButton.endBackground=$ToggleButton.background
-[dark]ToggleButton.selectedBackground=lighten($ToggleButton.background,15%,derived autoInverse)
-[dark]ToggleButton.disabledSelectedBackground=lighten($ToggleButton.background,5%,derived autoInverse)
+[dark]ToggleButton.selectedBackground=lighten($ToggleButton.background,15%,derived)
+[dark]ToggleButton.disabledSelectedBackground=lighten($ToggleButton.background,5%,derived)
 
 
 #---- theme specific ----

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

@@ -0,0 +1,48 @@
+#
+# 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.
+#
+
+#---- FileChooser ----
+
+#fields
+FileChooser.lookInLabel.textAndMnemonic=Look &In:
+FileChooser.saveInLabelText=Save In:
+FileChooser.fileNameLabel.textAndMnemonic=File &Name:
+FileChooser.folderNameLabel.textAndMnemonic=Folder &name:
+FileChooser.filesOfTypeLabel.textAndMnemonic=Files of &Type:
+
+# toolbar
+FileChooser.upFolderToolTipText=Up One Level
+FileChooser.upFolderAccessibleName=Up
+FileChooser.homeFolderToolTipText=Home
+FileChooser.homeFolderAccessibleName=Home
+FileChooser.newFolderToolTipText=Create New Folder
+FileChooser.newFolderAccessibleName=New Folder
+FileChooser.listViewButtonToolTipText=List
+FileChooser.listViewButtonAccessibleName=List
+FileChooser.detailsViewButtonToolTipText=Details
+FileChooser.detailsViewButtonAccessibleName=Details
+
+# details table header
+FileChooser.fileNameHeaderText=Name
+FileChooser.fileSizeHeaderText=Size
+FileChooser.fileTypeHeaderText=Type
+FileChooser.fileDateHeaderText=Modified
+FileChooser.fileAttrHeaderText=Attributes
+
+# popup menu
+FileChooser.viewMenuLabelText=View
+FileChooser.refreshActionLabelText=Refresh
+FileChooser.newFolderActionLabelText=New Folder
+FileChooser.listViewActionLabelText=List
+FileChooser.detailsViewActionLabelText=Details

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

@@ -0,0 +1,48 @@
+#
+# 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.
+#
+
+#---- FileChooser ----
+
+#fields
+FileChooser.lookInLabel.textAndMnemonic=Suchen &in:
+FileChooser.saveInLabelText=Speichern in:
+FileChooser.fileNameLabel.textAndMnemonic=&Dateiname:
+FileChooser.folderNameLabel.textAndMnemonic=Ordner&name:
+FileChooser.filesOfTypeLabel.textAndMnemonic=Datei&typ:
+
+# toolbar
+FileChooser.upFolderToolTipText=Eine Ebene h\u00F6her
+FileChooser.upFolderAccessibleName=Nach oben
+FileChooser.homeFolderToolTipText=Home
+FileChooser.homeFolderAccessibleName=Home
+FileChooser.newFolderToolTipText=Neuen Ordner erstellen
+FileChooser.newFolderAccessibleName=Neuer Ordner
+FileChooser.listViewButtonToolTipText=Liste
+FileChooser.listViewButtonAccessibleName=Liste
+FileChooser.detailsViewButtonToolTipText=Details
+FileChooser.detailsViewButtonAccessibleName=Details
+
+# details table header
+FileChooser.fileNameHeaderText=Name
+FileChooser.fileSizeHeaderText=Gr\u00F6\u00DFe
+FileChooser.fileTypeHeaderText=Typ
+FileChooser.fileDateHeaderText=\u00C4nderungsdatum
+FileChooser.fileAttrHeaderText=Attribute
+
+# popup menu
+FileChooser.viewMenuLabelText=Ansicht
+FileChooser.refreshActionLabelText=Aktualisieren
+FileChooser.newFolderActionLabelText=Neuer Ordner
+FileChooser.listViewActionLabelText=Liste
+FileChooser.detailsViewActionLabelText=Details

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

@@ -0,0 +1,48 @@
+#
+# 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.
+#
+
+#---- FileChooser ----
+
+#fields
+FileChooser.lookInLabel.textAndMnemonic=Rechercher &dans:
+FileChooser.saveInLabelText=Enregistrer dans:
+FileChooser.fileNameLabel.textAndMnemonic=&Nom du fichier:
+FileChooser.folderNameLabel.textAndMnemonic=&Nom du dossier:
+FileChooser.filesOfTypeLabel.textAndMnemonic=&Type de fichier:
+
+# toolbar
+FileChooser.upFolderToolTipText=Remonte d'un niveau
+FileChooser.upFolderAccessibleName=Monter
+FileChooser.homeFolderToolTipText=R\u00E9pertoire de base
+FileChooser.homeFolderAccessibleName=R\u00E9pertoire de base
+FileChooser.newFolderToolTipText=Cr\u00E9e un dossier
+FileChooser.newFolderAccessibleName=Nouveau dossier
+FileChooser.listViewButtonToolTipText=Liste
+FileChooser.listViewButtonAccessibleName=Liste
+FileChooser.detailsViewButtonToolTipText=D\u00E9tails
+FileChooser.detailsViewButtonAccessibleName=D\u00E9tails
+
+# details table header
+FileChooser.fileNameHeaderText=Nom
+FileChooser.fileSizeHeaderText=Taille
+FileChooser.fileTypeHeaderText=Type
+FileChooser.fileDateHeaderText=Modifi\u00E9
+FileChooser.fileAttrHeaderText=Attributs
+
+# popup menu
+FileChooser.viewMenuLabelText=Affichage
+FileChooser.refreshActionLabelText=Actualiser
+FileChooser.newFolderActionLabelText=Nouveau dossier
+FileChooser.listViewActionLabelText=Liste
+FileChooser.detailsViewActionLabelText=D\u00E9tails

flatlaf-demo/build.gradle.kts

@@ -27,11 +27,18 @@ plugins {
 	id( "com.jfrog.artifactory" )
 }
 
+repositories {
+	maven {
+		// for using MigLayout snapshot
+		url = uri( "https://oss.sonatype.org/content/repositories/snapshots/" )
+	}
+}
+
 dependencies {
 	implementation( project( ":flatlaf-core" ) )
 	implementation( project( ":flatlaf-extras" ) )
 	implementation( project( ":flatlaf-intellij-themes" ) )
-	implementation( "com.miglayout:miglayout-swing:5.2" )
+	implementation( "com.miglayout:miglayout-swing:5.3-SNAPSHOT" )
 	implementation( "com.jgoodies:jgoodies-forms:1.9.0" )
 }
 
@@ -49,6 +56,7 @@ tasks {
 		}
 
 		exclude( "module-info.class" )
+		exclude( "META-INF/versions/*/module-info.class" )
 
 		// include all dependencies in jar
 		from( {

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

@@ -114,6 +114,14 @@ class BasicComponentsPanel
 		JScrollPane scrollPane12 = new JScrollPane();
 		JTextPane textPane4 = new JTextPane();
 		JTextPane textPane5 = new JTextPane();
+		JLabel label3 = new JLabel();
+		JTextField textField5 = new JTextField();
+		JComboBox<String> comboBox7 = new JComboBox<>();
+		JSpinner spinner3 = new JSpinner();
+		JLabel label4 = new JLabel();
+		JTextField textField7 = new JTextField();
+		JComboBox<String> comboBox8 = new JComboBox<>();
+		JSpinner spinner4 = new JSpinner();
 		JPopupMenu popupMenu1 = new JPopupMenu();
 		JMenuItem cutMenuItem = new JMenuItem();
 		JMenuItem copyMenuItem = new JMenuItem();
@@ -141,6 +149,8 @@ class BasicComponentsPanel
 			"[]" +
 			"[]" +
 			"[]" +
+			"[]para" +
+			"[]" +
 			"[]"));
 
 		//---- labelLabel ----
@@ -179,9 +189,8 @@ class BasicComponentsPanel
 		add(button5, "cell 3 1");
 
 		//---- button6 ----
-		button6.setText("square");
-		button6.setEnabled(false);
-		button6.putClientProperty("JButton.buttonType", "square");
+		button6.setText("round");
+		button6.putClientProperty("JButton.buttonType", "roundRect");
 		add(button6, "cell 4 1");
 
 		//---- button3 ----
@@ -597,19 +606,61 @@ class BasicComponentsPanel
 		textPane5.setText("no scroll pane");
 		add(textPane5, "cell 5 11,growx");
 
+		//---- label3 ----
+		label3.setText("Error hints:");
+		add(label3, "cell 0 12");
+
+		//---- textField5 ----
+		textField5.putClientProperty("JComponent.outline", "error");
+		add(textField5, "cell 1 12,growx");
+
+		//---- comboBox7 ----
+		comboBox7.putClientProperty("JComponent.outline", "error");
+		comboBox7.setModel(new DefaultComboBoxModel<>(new String[] {
+			"editable"
+		}));
+		comboBox7.setEditable(true);
+		add(comboBox7, "cell 2 12,growx");
+
+		//---- spinner3 ----
+		spinner3.putClientProperty("JComponent.outline", "error");
+		add(spinner3, "cell 3 12,growx");
+
+		//---- label4 ----
+		label4.setText("Warning hints:");
+		add(label4, "cell 0 13");
+
+		//---- textField7 ----
+		textField7.putClientProperty("JComponent.outline", "warning");
+		add(textField7, "cell 1 13,growx");
+
+		//---- comboBox8 ----
+		comboBox8.putClientProperty("JComponent.outline", "warning");
+		comboBox8.setModel(new DefaultComboBoxModel<>(new String[] {
+			"not editable"
+		}));
+		add(comboBox8, "cell 2 13,growx");
+
+		//---- spinner4 ----
+		spinner4.putClientProperty("JComponent.outline", "warning");
+		add(spinner4, "cell 3 13,growx");
+
 		//======== popupMenu1 ========
 		{
 
 			//---- cutMenuItem ----
 			cutMenuItem.setText("Cut");
+			cutMenuItem.setMnemonic('C');
 			popupMenu1.add(cutMenuItem);
 
 			//---- copyMenuItem ----
 			copyMenuItem.setText("Copy");
+			copyMenuItem.setMnemonic('O');
 			popupMenu1.add(copyMenuItem);
 
 			//---- pasteMenuItem ----
 			pasteMenuItem.setText("Paste");
+			pasteMenuItem.setMnemonic('P');
 			popupMenu1.add(pasteMenuItem);
 		}
 		// JFormDesigner - End of component initialization  //GEN-END:initComponents

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "7.0.0.0.194" Java: "13.0.1" encoding: "UTF-8"
+JFDML JFormDesigner: "7.0.1.0.272" Java: "13.0.2" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -9,7 +9,7 @@ new FormModel {
 		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 			"$layoutConstraints": "hidemode 3"
 			"$columnConstraints": "[][][][][][]"
-			"$rowConstraints": "[][][][][][][][][][][][]"
+			"$rowConstraints": "[][][][][][][][][][][][]para[][]"
 		} ) {
 			name: "this"
 			add( new FormComponent( "javax.swing.JLabel" ) {
@@ -63,9 +63,8 @@ new FormModel {
 			} )
 			add( new FormComponent( "javax.swing.JButton" ) {
 				name: "button6"
-				"text": "square"
-				"enabled": false
-				"$client.JButton.buttonType": "square"
+				"text": "round"
+				"$client.JButton.buttonType": "roundRect"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 4 1"
 			} )
@@ -592,23 +591,83 @@ new FormModel {
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 5 11,growx"
 			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label3"
+				"text": "Error hints:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 12"
+			} )
+			add( new FormComponent( "javax.swing.JTextField" ) {
+				name: "textField5"
+				"$client.JComponent.outline": "error"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 12,growx"
+			} )
+			add( new FormComponent( "javax.swing.JComboBox" ) {
+				name: "comboBox7"
+				"$client.JComponent.outline": "error"
+				"model": new javax.swing.DefaultComboBoxModel {
+					selectedItem: "editable"
+					addElement( "editable" )
+				}
+				"editable": true
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 12,growx"
+			} )
+			add( new FormComponent( "javax.swing.JSpinner" ) {
+				name: "spinner3"
+				"$client.JComponent.outline": "error"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 3 12,growx"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label4"
+				"text": "Warning hints:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 13"
+			} )
+			add( new FormComponent( "javax.swing.JTextField" ) {
+				name: "textField7"
+				"$client.JComponent.outline": "warning"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 13,growx"
+			} )
+			add( new FormComponent( "javax.swing.JComboBox" ) {
+				name: "comboBox8"
+				"$client.JComponent.outline": "warning"
+				"model": new javax.swing.DefaultComboBoxModel {
+					selectedItem: "not editable"
+					addElement( "not editable" )
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 13,growx"
+			} )
+			add( new FormComponent( "javax.swing.JSpinner" ) {
+				name: "spinner4"
+				"$client.JComponent.outline": "warning"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 3 13,growx"
+			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 0 )
-			"size": new java.awt.Dimension( 790, 440 )
+			"size": new java.awt.Dimension( 920, 440 )
 		} )
 		add( new FormContainer( "javax.swing.JPopupMenu", new FormLayoutManager( class javax.swing.JPopupMenu ) ) {
 			name: "popupMenu1"
 			add( new FormComponent( "javax.swing.JMenuItem" ) {
 				name: "cutMenuItem"
 				"text": "Cut"
+				"mnemonic": 67
 			} )
 			add( new FormComponent( "javax.swing.JMenuItem" ) {
 				name: "copyMenuItem"
 				"text": "Copy"
+				"mnemonic": 79
 			} )
 			add( new FormComponent( "javax.swing.JMenuItem" ) {
 				name: "pasteMenuItem"
 				"text": "Paste"
+				"mnemonic": 80
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 500 )

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

@@ -37,7 +37,7 @@ import net.miginfocom.swing.*;
 class ControlBar
 	extends JPanel
 {
-	private JFrame frame;
+	private DemoFrame frame;
 	private JTabbedPane tabbedPane;
 
 	ControlBar() {
@@ -63,7 +63,7 @@ class ControlBar
 				(SystemInfo.IS_LINUX && className.equals( "com.sun.java.swing.plaf.gtk.GTKLookAndFeel") ) )
 				name += " (F9)";
 			else if( className.equals( MetalLookAndFeel.class.getName() ) )
-				name += " (F10)";
+				name += " (F12)";
 			else if( className.equals( NimbusLookAndFeel.class.getName() ) )
 				name += " (F11)";
 
@@ -78,6 +78,9 @@ class ControlBar
 					// update info label because user scale factor may change
 					updateInfoLabel();
 
+					// update "Font" menu
+					frame.updateFontMenuItems();
+
 					// this is necessary because embedded JOptionPane's "steal" the default button
 					frame.getRootPane().setDefaultButton( closeButton );
 				} );
@@ -90,7 +93,15 @@ class ControlBar
 		} );
 	}
 
-	void initialize( JFrame frame, JTabbedPane tabbedPane ) {
+	@Override
+	public void updateUI() {
+		super.updateUI();
+
+		if( infoLabel != null )
+			updateInfoLabel();
+	}
+
+	void initialize( DemoFrame frame, JTabbedPane tabbedPane ) {
 		this.frame = frame;
 		this.tabbedPane = tabbedPane;
 
@@ -106,7 +117,7 @@ class ControlBar
 			registerSwitchToLookAndFeel( KeyEvent.VK_F9, "com.apple.laf.AquaLookAndFeel" );
 		else if( SystemInfo.IS_LINUX )
 			registerSwitchToLookAndFeel( KeyEvent.VK_F9, "com.sun.java.swing.plaf.gtk.GTKLookAndFeel" );
-		registerSwitchToLookAndFeel( KeyEvent.VK_F10, MetalLookAndFeel.class.getName() );
+		registerSwitchToLookAndFeel( KeyEvent.VK_F12, MetalLookAndFeel.class.getName() );
 		registerSwitchToLookAndFeel( KeyEvent.VK_F11, NimbusLookAndFeel.class.getName() );
 
 		// register ESC key to close frame
@@ -139,12 +150,20 @@ class ControlBar
 	}
 
 	private void updateInfoLabel() {
+		String javaVendor = System.getProperty( "java.vendor" );
+		if( "Oracle Corporation".equals( javaVendor ) )
+			javaVendor = null;
 		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) : "")
 			+ (systemScaleFactor == 1 && userScaleFactor == 1 ? "; no scaling" : "")
+			+ "; " + font.getFamily() + " " + font.getSize()
+			+ (font.isBold() ? " BOLD" : "")
+			+ (font.isItalic() ? " ITALIC" : "")
 			+ ")";
 
 		if( !newInfo.equals( infoLabel.getText() ) )
@@ -177,6 +196,10 @@ class ControlBar
 				// change look and feel
 				UIManager.setLookAndFeel( lafClassName );
 
+				// clear custom default font when switching to non-FlatLaf LaF
+				if( !(UIManager.getLookAndFeel() instanceof FlatLaf) )
+					UIManager.put( "defaultFont", null );
+
 				// update all components
 				FlatLaf.updateUI();
 
@@ -208,6 +231,9 @@ class ControlBar
 
 	private void enabledChanged() {
 		enabledDisable( tabbedPane, enabledCheckBox.isSelected() );
+
+		// repainting whole tabbed pane is faster than repainting many individual components
+		tabbedPane.repaint();
 	}
 
 	private void enabledDisable( Container container, boolean enabled ) {

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

@@ -18,9 +18,13 @@ package com.formdev.flatlaf.demo;
 
 import java.awt.*;
 import java.awt.event.*;
+import java.util.ArrayList;
+import java.util.Arrays;
 import javax.swing.*;
 import javax.swing.text.DefaultEditorKit;
+import javax.swing.text.StyleContext;
 import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.demo.extras.*;
 import com.formdev.flatlaf.demo.intellijthemes.*;
 import com.formdev.flatlaf.extras.FlatSVGIcon;
 import net.miginfocom.swing.*;
@@ -31,10 +35,18 @@ import net.miginfocom.swing.*;
 class DemoFrame
 	extends JFrame
 {
+	private final String[] availableFontFamilyNames;
+	private int initialFontMenuItemCount = -1;
+
 	DemoFrame() {
 		int tabIndex = DemoPrefs.getState().getInt( FlatLafDemo.KEY_TAB, 0 );
 
+		availableFontFamilyNames = GraphicsEnvironment.getLocalGraphicsEnvironment()
+			.getAvailableFontFamilyNames().clone();
+		Arrays.sort( availableFontFamilyNames );
+
 		initComponents();
+		updateFontMenuItems();
 		controlBar.initialize( this, tabbedPane );
 
 		if( tabIndex >= 0 && tabIndex < tabbedPane.getTabCount() && tabIndex != tabbedPane.getSelectedIndex() )
@@ -59,11 +71,20 @@ class DemoFrame
 		} );
 	}
 
+	private void underlineMenuSelection() {
+		UIManager.put( "MenuItem.selectionType", underlineMenuSelectionMenuItem.isSelected() ? "underline" : null );
+	}
+
+	private void alwaysShowMnemonics() {
+		UIManager.put( "Component.hideMnemonics", !alwaysShowMnemonicsMenuItem.isSelected() );
+		repaint();
+	}
+
 	private void fontFamilyChanged( ActionEvent e ) {
 		String fontFamily = e.getActionCommand();
 
 		Font font = UIManager.getFont( "defaultFont" );
-		Font newFont = new Font( fontFamily, font.getStyle(), font.getSize() );
+		Font newFont = StyleContext.getDefaultStyleContext().getFont( fontFamily, font.getStyle(), font.getSize() );
 		UIManager.put( "defaultFont", newFont );
 
 		FlatLaf.updateUI();
@@ -81,6 +102,7 @@ class DemoFrame
 
 	private void restoreFont() {
 		UIManager.put( "defaultFont", null );
+		updateFontMenuItems();
 		FlatLaf.updateUI();
 	}
 
@@ -89,17 +111,80 @@ class DemoFrame
 		Font newFont = font.deriveFont( (float) (font.getSize() + 1) );
 		UIManager.put( "defaultFont", newFont );
 
+		updateFontMenuItems();
 		FlatLaf.updateUI();
 	}
 
 	private void decrFont() {
 		Font font = UIManager.getFont( "defaultFont" );
-		Font newFont = font.deriveFont( (float) Math.max( font.getSize() - 1, 8 ) );
+		Font newFont = font.deriveFont( (float) Math.max( font.getSize() - 1, 10 ) );
 		UIManager.put( "defaultFont", newFont );
 
+		updateFontMenuItems();
 		FlatLaf.updateUI();
 	}
 
+	void updateFontMenuItems() {
+		if( initialFontMenuItemCount < 0 )
+			initialFontMenuItemCount = fontMenu.getItemCount();
+		else {
+			// remove old font items
+			for( int i = fontMenu.getItemCount() - 1; i >= initialFontMenuItemCount; i-- )
+				fontMenu.remove( i );
+		}
+
+		// get current font
+		Font currentFont = UIManager.getFont( "Label.font" );
+		String currentFamily = currentFont.getFamily();
+		String currentSize = Integer.toString( currentFont.getSize() );
+
+		// add font families
+		fontMenu.addSeparator();
+		ArrayList<String> families = new ArrayList<>( Arrays.asList(
+			"Arial", "Cantarell", "Comic Sans MS", "Courier New", "DejaVu Sans",
+			"Dialog", "Liberation Sans", "Monospaced", "Noto Sans", "Roboto",
+			"SansSerif", "Segoe UI", "Serif", "Tahoma", "Ubuntu", "Verdana" ) );
+		if( !families.contains( currentFamily ) )
+			families.add( currentFamily );
+		families.sort( String.CASE_INSENSITIVE_ORDER );
+
+		ButtonGroup familiesGroup = new ButtonGroup();
+		for( String family : families ) {
+			if( Arrays.binarySearch( availableFontFamilyNames, family ) < 0 )
+				continue; // not available
+
+			JCheckBoxMenuItem item = new JCheckBoxMenuItem( family );
+			item.setSelected( family.equals( currentFamily ) );
+			item.addActionListener( this::fontFamilyChanged );
+			fontMenu.add( item );
+
+			familiesGroup.add( item );
+		}
+
+		// add font sizes
+		fontMenu.addSeparator();
+		ArrayList<String> sizes = new ArrayList<>( Arrays.asList(
+			"10", "12", "14", "16", "18", "20", "24", "28" ) );
+		if( !sizes.contains( currentSize ) )
+			sizes.add( currentSize );
+		sizes.sort( String.CASE_INSENSITIVE_ORDER );
+
+		ButtonGroup sizesGroup = new ButtonGroup();
+		for( String size : sizes ) {
+			JCheckBoxMenuItem item = new JCheckBoxMenuItem( size );
+			item.setSelected( size.equals( currentSize ) );
+			item.addActionListener( this::fontSizeChanged );
+			fontMenu.add( item );
+
+			sizesGroup.add( item );
+		}
+
+		// enabled/disable items
+		boolean enabled = UIManager.getLookAndFeel() instanceof FlatLaf;
+		for( Component item : fontMenu.getMenuComponents() )
+			item.setEnabled( enabled );
+	}
+
 	private void initComponents() {
 		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
 		JMenuBar menuBar1 = new JMenuBar();
@@ -125,6 +210,7 @@ class DemoFrame
 		JMenuItem projectViewMenuItem = new JMenuItem();
 		JMenuItem structureViewMenuItem = new JMenuItem();
 		JMenuItem propertiesViewMenuItem = new JMenuItem();
+		JMenuItem menuItem1 = new JMenuItem();
 		JRadioButtonMenuItem radioButtonMenuItem1 = new JRadioButtonMenuItem();
 		JRadioButtonMenuItem radioButtonMenuItem2 = new JRadioButtonMenuItem();
 		JRadioButtonMenuItem radioButtonMenuItem3 = new JRadioButtonMenuItem();
@@ -132,6 +218,9 @@ class DemoFrame
 		JMenuItem restoreFontMenuItem = new JMenuItem();
 		JMenuItem incrFontMenuItem = new JMenuItem();
 		JMenuItem decrFontMenuItem = new JMenuItem();
+		JMenu optionsMenu = new JMenu();
+		underlineMenuSelectionMenuItem = new JCheckBoxMenuItem();
+		alwaysShowMnemonicsMenuItem = new JCheckBoxMenuItem();
 		JMenu helpMenu = new JMenu();
 		JMenuItem aboutMenuItem = new JMenuItem();
 		JToolBar toolBar1 = new JToolBar();
@@ -149,6 +238,7 @@ class DemoFrame
 		DataComponentsPanel dataComponentsPanel = new DataComponentsPanel();
 		TabsPanel tabsPanel = new TabsPanel();
 		OptionPanePanel optionPanePanel = new OptionPanePanel();
+		ExtrasPanel extrasPanel1 = new ExtrasPanel();
 		controlBar = new ControlBar();
 		IJThemesPanel themesPanel = new IJThemesPanel();
 
@@ -308,6 +398,10 @@ class DemoFrame
 					menu1.add(propertiesViewMenuItem);
 				}
 				viewMenu.add(menu1);
+
+				//---- menuItem1 ----
+				menuItem1.setText("<html>some <b color=\"red\">HTML</b> <i color=\"blue\">text</i></html>");
+				viewMenu.add(menuItem1);
 				viewMenu.addSeparator();
 
 				//---- radioButtonMenuItem1 ----
@@ -337,24 +431,40 @@ class DemoFrame
 
 				//---- restoreFontMenuItem ----
 				restoreFontMenuItem.setText("Restore Font");
-				restoreFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_0, KeyEvent.CTRL_MASK));
+				restoreFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_0, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
 				restoreFontMenuItem.addActionListener(e -> restoreFont());
 				fontMenu.add(restoreFontMenuItem);
 
 				//---- incrFontMenuItem ----
 				incrFontMenuItem.setText("Increase Font Size");
-				incrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, KeyEvent.CTRL_MASK));
+				incrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
 				incrFontMenuItem.addActionListener(e -> incrFont());
 				fontMenu.add(incrFontMenuItem);
 
 				//---- decrFontMenuItem ----
 				decrFontMenuItem.setText("Decrease Font Size");
-				decrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, KeyEvent.CTRL_MASK));
+				decrFontMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
 				decrFontMenuItem.addActionListener(e -> decrFont());
 				fontMenu.add(decrFontMenuItem);
 			}
 			menuBar1.add(fontMenu);
 
+			//======== optionsMenu ========
+			{
+				optionsMenu.setText("Options");
+
+				//---- underlineMenuSelectionMenuItem ----
+				underlineMenuSelectionMenuItem.setText("Use underline menu selection");
+				underlineMenuSelectionMenuItem.addActionListener(e -> underlineMenuSelection());
+				optionsMenu.add(underlineMenuSelectionMenuItem);
+
+				//---- alwaysShowMnemonicsMenuItem ----
+				alwaysShowMnemonicsMenuItem.setText("Always show mnemonics");
+				alwaysShowMnemonicsMenuItem.addActionListener(e -> alwaysShowMnemonics());
+				optionsMenu.add(alwaysShowMnemonicsMenuItem);
+			}
+			menuBar1.add(optionsMenu);
+
 			//======== helpMenu ========
 			{
 				helpMenu.setText("Help");
@@ -425,6 +535,7 @@ class DemoFrame
 				tabbedPane.addTab("Data Components", dataComponentsPanel);
 				tabbedPane.addTab("SplitPane & Tabs", tabsPanel);
 				tabbedPane.addTab("Option Pane", optionPanePanel);
+				tabbedPane.addTab("Extras", extrasPanel1);
 			}
 			contentPanel.add(tabbedPane, "cell 0 0");
 		}
@@ -457,30 +568,12 @@ class DemoFrame
 		cutMenuItem.addActionListener( new DefaultEditorKit.CutAction() );
 		copyMenuItem.addActionListener( new DefaultEditorKit.CopyAction() );
 		pasteMenuItem.addActionListener( new DefaultEditorKit.PasteAction() );
-
-		// add font families
-		fontMenu.addSeparator();
-		String[] fontFamilies = { "Arial", "Comic Sans MS", "Courier New", "Dialog",
-			"Monospaced", "SansSerif", "Serif", "Tahoma", "Verdana" };
-		for( String fontFamily : fontFamilies ) {
-			JMenuItem fontItem = new JMenuItem( fontFamily );
-			fontItem.addActionListener( this::fontFamilyChanged );
-			fontMenu.add( fontItem );
-		}
-
-		// add font sizes
-		fontMenu.addSeparator();
-		int[] fontSizes = { 8, 10, 12, 14, 16, 18, 20, 24, 28 };
-		for( int fontSize : fontSizes ) {
-			String fontSizeStr = Integer.toString( fontSize );
-			JMenuItem fontItem = new JMenuItem( fontSizeStr );
-			fontItem.addActionListener( this::fontSizeChanged );
-			fontMenu.add( fontItem );
-		}
 	}
 
 	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
 	private JMenu fontMenu;
+	private JCheckBoxMenuItem underlineMenuSelectionMenuItem;
+	private JCheckBoxMenuItem alwaysShowMnemonicsMenuItem;
 	private JTabbedPane tabbedPane;
 	private ControlBar controlBar;
 	// JFormDesigner - End of variables declaration  //GEN-END:variables

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

@@ -93,6 +93,11 @@ new FormModel {
 					}, new FormLayoutConstraints( null ) {
 						"title": "Option Pane"
 					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.extras.ExtrasPanel" ) {
+						name: "extrasPanel1"
+					}, new FormLayoutConstraints( null ) {
+						"title": "Extras"
+					} )
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 0"
 				} )
@@ -259,6 +264,10 @@ new FormModel {
 							addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "menuItemActionPerformed", true ) )
 						} )
 					} )
+					add( new FormComponent( "javax.swing.JMenuItem" ) {
+						name: "menuItem1"
+						"text": "<html>some <b color=\"red\">HTML</b> <i color=\"blue\">text</i></html>"
+					} )
 					add( new FormComponent( "javax.swing.JPopupMenu$Separator" ) {
 						name: "separator8"
 					} )
@@ -294,22 +303,42 @@ new FormModel {
 					add( new FormComponent( "javax.swing.JMenuItem" ) {
 						name: "restoreFontMenuItem"
 						"text": "Restore Font"
-						"accelerator": static javax.swing.KeyStroke getKeyStroke( 48, 130, false )
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 48, 4226, 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, 130, false )
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 521, 4226, 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, 130, false )
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 45, 4226, false )
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "decrFont", false ) )
 					} )
 				} )
+				add( new FormContainer( "javax.swing.JMenu", new FormLayoutManager( class javax.swing.JMenu ) ) {
+					name: "optionsMenu"
+					"text": "Options"
+					add( new FormComponent( "javax.swing.JCheckBoxMenuItem" ) {
+						name: "underlineMenuSelectionMenuItem"
+						"text": "Use underline menu selection"
+						auxiliary() {
+							"JavaCodeGenerator.variableLocal": false
+						}
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "underlineMenuSelection", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JCheckBoxMenuItem" ) {
+						name: "alwaysShowMnemonicsMenuItem"
+						"text": "Always show mnemonics"
+						auxiliary() {
+							"JavaCodeGenerator.variableLocal": false
+						}
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "alwaysShowMnemonics", false ) )
+					} )
+				} )
 				add( new FormContainer( "javax.swing.JMenu", new FormLayoutManager( class javax.swing.JMenu ) ) {
 					name: "helpMenu"
 					"text": "Help"

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

@@ -22,9 +22,9 @@ import java.util.prefs.Preferences;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.FlatLightLaf;
+import com.formdev.flatlaf.FlatPropertiesLaf;
 import com.formdev.flatlaf.IntelliJTheme;
 import com.formdev.flatlaf.demo.intellijthemes.IJThemesPanel;
-import com.formdev.flatlaf.demo.intellijthemes.IJThemesPanel.PropertiesLaf;
 import com.formdev.flatlaf.util.StringUtils;
 
 /**
@@ -68,12 +68,12 @@ public class DemoPrefs
 
 					if( !theme.isEmpty() )
 						UIManager.getLookAndFeelDefaults().put( THEME_UI_KEY, theme );
-				} else if( IJThemesPanel.PropertiesLaf.class.getName().equals( lafClassName ) ) {
+				} else if( FlatPropertiesLaf.class.getName().equals( lafClassName ) ) {
 					String theme = state.get( KEY_LAF_THEME, "" );
 					if( theme.startsWith( FILE_PREFIX ) ) {
 						File themeFile = new File( theme.substring( FILE_PREFIX.length() ) );
 						String themeName = StringUtils.removeTrailing( themeFile.getName(), ".properties" );
-						FlatLaf.install( new PropertiesLaf( themeName, themeFile ) );
+						FlatLaf.install( new FlatPropertiesLaf( themeName, themeFile ) );
 					} else
 						FlatLightLaf.install();
 
@@ -82,7 +82,7 @@ public class DemoPrefs
 				} else
 					UIManager.setLookAndFeel( lafClassName );
 			}
-		} catch( Exception ex ) {
+		} catch( Throwable ex ) {
 			ex.printStackTrace();
 
 			// fallback

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

@@ -17,6 +17,8 @@
 package com.formdev.flatlaf.demo;
 
 import javax.swing.SwingUtilities;
+import com.formdev.flatlaf.extras.FlatInspector;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * @author Karl Tauber
@@ -27,12 +29,19 @@ public class FlatLafDemo
 	static final String KEY_TAB = "tab";
 
 	public static void main( String[] args ) {
+		// on macOS enable screen menu bar
+		if( SystemInfo.IS_MAC && System.getProperty( "apple.laf.useScreenMenuBar" ) == null )
+			System.setProperty( "apple.laf.useScreenMenuBar", "true" );
+
 		SwingUtilities.invokeLater( () -> {
 			DemoPrefs.init( PREFS_ROOT_PATH );
 
 			// set look and feel
 			DemoPrefs.initLaf( args );
 
+			// install inspector
+			FlatInspector.install( "ctrl shift alt X" );
+
 			// create frame
 			DemoFrame frame = new DemoFrame();
 

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

@@ -27,7 +27,7 @@ import net.miginfocom.swing.*;
  * @author Karl Tauber
  */
 class OptionPanePanel
-	extends JScrollPane
+	extends JPanel
 {
 	OptionPanePanel() {
 		initComponents();
@@ -48,6 +48,7 @@ class OptionPanePanel
 
 	private void initComponents() {
 		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
+		JScrollPane scrollPane1 = new JScrollPane();
 		ScrollablePanel panel9 = new ScrollablePanel();
 		JLabel plainLabel = new JLabel();
 		JPanel panel1 = new JPanel();
@@ -83,200 +84,206 @@ class OptionPanePanel
 		OptionPanePanel.ShowDialogLinkLabel customShowDialogLabel = new OptionPanePanel.ShowDialogLinkLabel();
 
 		//======== this ========
-		setBorder(BorderFactory.createEmptyBorder());
+		setLayout(new BorderLayout());
 
-		//======== panel9 ========
+		//======== scrollPane1 ========
 		{
-			panel9.setLayout(new MigLayout(
-				"flowy,hidemode 3",
-				// columns
-				"[]" +
-				"[]" +
-				"[fill]",
-				// rows
-				"[top]" +
-				"[top]" +
-				"[top]" +
-				"[top]" +
-				"[top]" +
-				"[top]" +
-				"[top]" +
-				"[top]"));
+			scrollPane1.setBorder(BorderFactory.createEmptyBorder());
 
-			//---- plainLabel ----
-			plainLabel.setText("Plain");
-			panel9.add(plainLabel, "cell 0 0");
-
-			//======== panel1 ========
+			//======== panel9 ========
 			{
-				panel1.setBorder(LineBorder.createGrayLineBorder());
-				panel1.setLayout(new BorderLayout());
+				panel9.setLayout(new MigLayout(
+					"flowy,hidemode 3",
+					// columns
+					"[]" +
+					"[]" +
+					"[fill]",
+					// rows
+					"[top]" +
+					"[top]" +
+					"[top]" +
+					"[top]" +
+					"[top]" +
+					"[top]" +
+					"[top]" +
+					"[top]"));
 
-				//---- plainOptionPane ----
-				plainOptionPane.setMessage("Hello world.");
-				panel1.add(plainOptionPane, BorderLayout.CENTER);
+				//---- plainLabel ----
+				plainLabel.setText("Plain");
+				panel9.add(plainLabel, "cell 0 0");
+
+				//======== panel1 ========
+				{
+					panel1.setBorder(LineBorder.createGrayLineBorder());
+					panel1.setLayout(new BorderLayout());
+
+					//---- plainOptionPane ----
+					plainOptionPane.setMessage("Hello world.");
+					panel1.add(plainOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel1, "cell 1 0");
+
+				//---- plainShowDialogLabel ----
+				plainShowDialogLabel.setOptionPane(plainOptionPane);
+				plainShowDialogLabel.setTitleLabel(plainLabel);
+				panel9.add(plainShowDialogLabel, "cell 2 0");
+
+				//---- errorLabel ----
+				errorLabel.setText("Error");
+				panel9.add(errorLabel, "cell 0 1");
+
+				//======== panel2 ========
+				{
+					panel2.setBorder(LineBorder.createGrayLineBorder());
+					panel2.setLayout(new BorderLayout());
+
+					//---- errorOptionPane ----
+					errorOptionPane.setMessageType(JOptionPane.ERROR_MESSAGE);
+					errorOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
+					errorOptionPane.setMessage("Your PC ran into a problem. Buy a new one.");
+					panel2.add(errorOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel2, "cell 1 1");
+
+				//---- errorShowDialogLabel ----
+				errorShowDialogLabel.setTitleLabel(errorLabel);
+				errorShowDialogLabel.setOptionPane(errorOptionPane);
+				panel9.add(errorShowDialogLabel, "cell 2 1");
+
+				//---- informationLabel ----
+				informationLabel.setText("Information");
+				panel9.add(informationLabel, "cell 0 2");
+
+				//======== panel3 ========
+				{
+					panel3.setBorder(LineBorder.createGrayLineBorder());
+					panel3.setLayout(new BorderLayout());
+
+					//---- informationOptionPane ----
+					informationOptionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
+					informationOptionPane.setOptionType(JOptionPane.YES_NO_OPTION);
+					informationOptionPane.setMessage("Text with\nmultiple lines\n(use \\n to separate lines)");
+					panel3.add(informationOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel3, "cell 1 2");
+
+				//---- informationShowDialogLabel ----
+				informationShowDialogLabel.setOptionPane(informationOptionPane);
+				informationShowDialogLabel.setTitleLabel(informationLabel);
+				panel9.add(informationShowDialogLabel, "cell 2 2");
+
+				//---- questionLabel ----
+				questionLabel.setText("Question");
+				panel9.add(questionLabel, "cell 0 3");
+
+				//======== panel4 ========
+				{
+					panel4.setBorder(LineBorder.createGrayLineBorder());
+					panel4.setLayout(new BorderLayout());
+
+					//---- questionOptionPane ----
+					questionOptionPane.setMessageType(JOptionPane.QUESTION_MESSAGE);
+					questionOptionPane.setOptionType(JOptionPane.YES_NO_CANCEL_OPTION);
+					questionOptionPane.setMessage("Answer the question. What question? Don't know. Just writing useless text to make this longer than 80 characters.");
+					panel4.add(questionOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel4, "cell 1 3");
+
+				//---- questionShowDialogLabel ----
+				questionShowDialogLabel.setOptionPane(questionOptionPane);
+				questionShowDialogLabel.setTitleLabel(questionLabel);
+				panel9.add(questionShowDialogLabel, "cell 2 3");
+
+				//---- warningLabel ----
+				warningLabel.setText("Warning");
+				panel9.add(warningLabel, "cell 0 4");
+
+				//======== panel5 ========
+				{
+					panel5.setBorder(LineBorder.createGrayLineBorder());
+					panel5.setLayout(new BorderLayout());
+
+					//---- warningOptionPane ----
+					warningOptionPane.setMessageType(JOptionPane.WARNING_MESSAGE);
+					warningOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
+					warningOptionPane.setMessage("<html>I like <b>bold</b>,<br> and I like <i>italic</i>,<br> and I like to have<br> many lines.<br> Lots of lines.");
+					panel5.add(warningOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel5, "cell 1 4");
+
+				//---- warningShowDialogLabel ----
+				warningShowDialogLabel.setOptionPane(warningOptionPane);
+				warningShowDialogLabel.setTitleLabel(warningLabel);
+				panel9.add(warningShowDialogLabel, "cell 2 4");
+
+				//---- inputLabel ----
+				inputLabel.setText("Input");
+				panel9.add(inputLabel, "cell 0 5");
+
+				//======== panel7 ========
+				{
+					panel7.setBorder(LineBorder.createGrayLineBorder());
+					panel7.setLayout(new BorderLayout());
+
+					//---- inputOptionPane ----
+					inputOptionPane.setWantsInput(true);
+					inputOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
+					inputOptionPane.setMessage("Enter whatever you want:");
+					panel7.add(inputOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel7, "cell 1 5");
+
+				//---- inputShowDialogLabel ----
+				inputShowDialogLabel.setOptionPane(inputOptionPane);
+				inputShowDialogLabel.setTitleLabel(inputLabel);
+				panel9.add(inputShowDialogLabel, "cell 2 5");
+
+				//---- inputIconLabel ----
+				inputIconLabel.setText("Input + icon");
+				panel9.add(inputIconLabel, "cell 0 6");
+
+				//======== panel8 ========
+				{
+					panel8.setBorder(LineBorder.createGrayLineBorder());
+					panel8.setLayout(new BorderLayout());
+
+					//---- inputIconOptionPane ----
+					inputIconOptionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
+					inputIconOptionPane.setWantsInput(true);
+					inputIconOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
+					inputIconOptionPane.setMessage("Enter something:");
+					panel8.add(inputIconOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel8, "cell 1 6");
+
+				//---- inputIconShowDialogLabel ----
+				inputIconShowDialogLabel.setTitleLabel(inputIconLabel);
+				inputIconShowDialogLabel.setOptionPane(inputIconOptionPane);
+				panel9.add(inputIconShowDialogLabel, "cell 2 6");
+
+				//---- customLabel ----
+				customLabel.setText("Custom");
+				panel9.add(customLabel, "cell 0 7");
+
+				//======== panel6 ========
+				{
+					panel6.setBorder(LineBorder.createGrayLineBorder());
+					panel6.setLayout(new BorderLayout());
+
+					//---- customOptionPane ----
+					customOptionPane.setIcon(UIManager.getIcon("Tree.leafIcon"));
+					panel6.add(customOptionPane, BorderLayout.CENTER);
+				}
+				panel9.add(panel6, "cell 1 7");
+
+				//---- customShowDialogLabel ----
+				customShowDialogLabel.setOptionPane(customOptionPane);
+				customShowDialogLabel.setTitleLabel(customLabel);
+				panel9.add(customShowDialogLabel, "cell 2 7");
 			}
-			panel9.add(panel1, "cell 1 0");
-
-			//---- plainShowDialogLabel ----
-			plainShowDialogLabel.setOptionPane(plainOptionPane);
-			plainShowDialogLabel.setTitleLabel(plainLabel);
-			panel9.add(plainShowDialogLabel, "cell 2 0");
-
-			//---- errorLabel ----
-			errorLabel.setText("Error");
-			panel9.add(errorLabel, "cell 0 1");
-
-			//======== panel2 ========
-			{
-				panel2.setBorder(LineBorder.createGrayLineBorder());
-				panel2.setLayout(new BorderLayout());
-
-				//---- errorOptionPane ----
-				errorOptionPane.setMessageType(JOptionPane.ERROR_MESSAGE);
-				errorOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
-				errorOptionPane.setMessage("Your PC ran into a problem. Buy a new one.");
-				panel2.add(errorOptionPane, BorderLayout.CENTER);
-			}
-			panel9.add(panel2, "cell 1 1");
-
-			//---- errorShowDialogLabel ----
-			errorShowDialogLabel.setTitleLabel(errorLabel);
-			errorShowDialogLabel.setOptionPane(errorOptionPane);
-			panel9.add(errorShowDialogLabel, "cell 2 1");
-
-			//---- informationLabel ----
-			informationLabel.setText("Information");
-			panel9.add(informationLabel, "cell 0 2");
-
-			//======== panel3 ========
-			{
-				panel3.setBorder(LineBorder.createGrayLineBorder());
-				panel3.setLayout(new BorderLayout());
-
-				//---- informationOptionPane ----
-				informationOptionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
-				informationOptionPane.setOptionType(JOptionPane.YES_NO_OPTION);
-				informationOptionPane.setMessage("Text with\nmultiple lines\n(use \\n to separate lines)");
-				panel3.add(informationOptionPane, BorderLayout.CENTER);
-			}
-			panel9.add(panel3, "cell 1 2");
-
-			//---- informationShowDialogLabel ----
-			informationShowDialogLabel.setOptionPane(informationOptionPane);
-			informationShowDialogLabel.setTitleLabel(informationLabel);
-			panel9.add(informationShowDialogLabel, "cell 2 2");
-
-			//---- questionLabel ----
-			questionLabel.setText("Question");
-			panel9.add(questionLabel, "cell 0 3");
-
-			//======== panel4 ========
-			{
-				panel4.setBorder(LineBorder.createGrayLineBorder());
-				panel4.setLayout(new BorderLayout());
-
-				//---- questionOptionPane ----
-				questionOptionPane.setMessageType(JOptionPane.QUESTION_MESSAGE);
-				questionOptionPane.setOptionType(JOptionPane.YES_NO_CANCEL_OPTION);
-				questionOptionPane.setMessage("Answer the question. What question? Don't know. Just writing useless text to make this longer than 80 characters.");
-				panel4.add(questionOptionPane, BorderLayout.CENTER);
-			}
-			panel9.add(panel4, "cell 1 3");
-
-			//---- questionShowDialogLabel ----
-			questionShowDialogLabel.setOptionPane(questionOptionPane);
-			questionShowDialogLabel.setTitleLabel(questionLabel);
-			panel9.add(questionShowDialogLabel, "cell 2 3");
-
-			//---- warningLabel ----
-			warningLabel.setText("Warning");
-			panel9.add(warningLabel, "cell 0 4");
-
-			//======== panel5 ========
-			{
-				panel5.setBorder(LineBorder.createGrayLineBorder());
-				panel5.setLayout(new BorderLayout());
-
-				//---- warningOptionPane ----
-				warningOptionPane.setMessageType(JOptionPane.WARNING_MESSAGE);
-				warningOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
-				warningOptionPane.setMessage("<html>I like <b>bold</b>,<br> and I like <i>italic</i>,<br> and I like to have<br> many lines.<br> Lots of lines.");
-				panel5.add(warningOptionPane, BorderLayout.CENTER);
-			}
-			panel9.add(panel5, "cell 1 4");
-
-			//---- warningShowDialogLabel ----
-			warningShowDialogLabel.setOptionPane(warningOptionPane);
-			warningShowDialogLabel.setTitleLabel(warningLabel);
-			panel9.add(warningShowDialogLabel, "cell 2 4");
-
-			//---- inputLabel ----
-			inputLabel.setText("Input");
-			panel9.add(inputLabel, "cell 0 5");
-
-			//======== panel7 ========
-			{
-				panel7.setBorder(LineBorder.createGrayLineBorder());
-				panel7.setLayout(new BorderLayout());
-
-				//---- inputOptionPane ----
-				inputOptionPane.setWantsInput(true);
-				inputOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
-				inputOptionPane.setMessage("Enter whatever you want:");
-				panel7.add(inputOptionPane, BorderLayout.CENTER);
-			}
-			panel9.add(panel7, "cell 1 5");
-
-			//---- inputShowDialogLabel ----
-			inputShowDialogLabel.setOptionPane(inputOptionPane);
-			inputShowDialogLabel.setTitleLabel(inputLabel);
-			panel9.add(inputShowDialogLabel, "cell 2 5");
-
-			//---- inputIconLabel ----
-			inputIconLabel.setText("Input + icon");
-			panel9.add(inputIconLabel, "cell 0 6");
-
-			//======== panel8 ========
-			{
-				panel8.setBorder(LineBorder.createGrayLineBorder());
-				panel8.setLayout(new BorderLayout());
-
-				//---- inputIconOptionPane ----
-				inputIconOptionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
-				inputIconOptionPane.setWantsInput(true);
-				inputIconOptionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
-				inputIconOptionPane.setMessage("Enter something:");
-				panel8.add(inputIconOptionPane, BorderLayout.CENTER);
-			}
-			panel9.add(panel8, "cell 1 6");
-
-			//---- inputIconShowDialogLabel ----
-			inputIconShowDialogLabel.setTitleLabel(inputIconLabel);
-			inputIconShowDialogLabel.setOptionPane(inputIconOptionPane);
-			panel9.add(inputIconShowDialogLabel, "cell 2 6");
-
-			//---- customLabel ----
-			customLabel.setText("Custom");
-			panel9.add(customLabel, "cell 0 7");
-
-			//======== panel6 ========
-			{
-				panel6.setBorder(LineBorder.createGrayLineBorder());
-				panel6.setLayout(new BorderLayout());
-
-				//---- customOptionPane ----
-				customOptionPane.setIcon(UIManager.getIcon("Tree.leafIcon"));
-				panel6.add(customOptionPane, BorderLayout.CENTER);
-			}
-			panel9.add(panel6, "cell 1 7");
-
-			//---- customShowDialogLabel ----
-			customShowDialogLabel.setOptionPane(customOptionPane);
-			customShowDialogLabel.setTitleLabel(customLabel);
-			panel9.add(customShowDialogLabel, "cell 2 7");
+			scrollPane1.setViewportView(panel9);
 		}
-		setViewportView(panel9);
+		add(scrollPane1, BorderLayout.CENTER);
 		// JFormDesigner - End of component initialization  //GEN-END:initComponents
 	}
 

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

@@ -6,240 +6,245 @@ new FormModel {
 		auxiliary() {
 			"JavaCodeGenerator.defaultVariableLocal": true
 		}
-		add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
+		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
 			name: "this"
-			"border": new javax.swing.border.EmptyBorder( 0, 0, 0, 0 )
-			add( new FormContainer( "com.formdev.flatlaf.demo.ScrollablePanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
-				"$layoutConstraints": "flowy,hidemode 3"
-				"$columnConstraints": "[][][fill]"
-				"$rowConstraints": "[top][top][top][top][top][top][top][top]"
-			} ) {
-				name: "panel9"
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "plainLabel"
-					"text": "Plain"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 0"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel1"
-					"border": &LineBorder0 new javax.swing.border.LineBorder( sfield java.awt.Color gray, 1, false )
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "plainOptionPane"
-						"message": "Hello world."
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
+			add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
+				name: "scrollPane1"
+				"border": new javax.swing.border.EmptyBorder( 0, 0, 0, 0 )
+				add( new FormContainer( "com.formdev.flatlaf.demo.ScrollablePanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
+					"$layoutConstraints": "flowy,hidemode 3"
+					"$columnConstraints": "[][][fill]"
+					"$rowConstraints": "[top][top][top][top][top][top][top][top]"
+				} ) {
+					name: "panel9"
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "plainLabel"
+						"text": "Plain"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 0"
 					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 0"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "plainShowDialogLabel"
-					"optionPane": new FormReference( "plainOptionPane" )
-					"titleLabel": new FormReference( "plainLabel" )
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-					}
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 0"
-				} )
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "errorLabel"
-					"text": "Error"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 1"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel2"
-					"border": #LineBorder0
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "errorOptionPane"
-						"messageType": 0
-						"optionType": 2
-						"message": "Your PC ran into a problem. Buy a new one."
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel1"
+						"border": &LineBorder0 new javax.swing.border.LineBorder( sfield java.awt.Color gray, 1, false )
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "plainOptionPane"
+							"message": "Hello world."
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 0"
 					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 1"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "errorShowDialogLabel"
-					"titleLabel": new FormReference( "errorLabel" )
-					"optionPane": new FormReference( "errorOptionPane" )
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-					}
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 1"
-				} )
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "informationLabel"
-					"text": "Information"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 2"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel3"
-					"border": #LineBorder0
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "informationOptionPane"
-						"messageType": 1
-						"optionType": 0
-						"message": "Text with\nmultiple lines\n(use \\n to separate lines)"
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
-					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 2"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "informationShowDialogLabel"
-					"optionPane": new FormReference( "informationOptionPane" )
-					"titleLabel": new FormReference( "informationLabel" )
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-					}
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 2"
-				} )
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "questionLabel"
-					"text": "Question"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 3"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel4"
-					"border": #LineBorder0
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "questionOptionPane"
-						"messageType": 3
-						"optionType": 1
-						"message": "Answer the question. What question? Don't know. Just writing useless text to make this longer than 80 characters."
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
-					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 3"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "questionShowDialogLabel"
-					"optionPane": new FormReference( "questionOptionPane" )
-					"titleLabel": new FormReference( "questionLabel" )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 3"
-				} )
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "warningLabel"
-					"text": "Warning"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 4"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel5"
-					"border": #LineBorder0
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "warningOptionPane"
-						"messageType": 2
-						"optionType": 2
-						"message": "<html>I like <b>bold</b>,<br> and I like <i>italic</i>,<br> and I like to have<br> many lines.<br> Lots of lines."
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
-					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 4"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "warningShowDialogLabel"
-					"optionPane": new FormReference( "warningOptionPane" )
-					"titleLabel": new FormReference( "warningLabel" )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 4"
-				} )
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "inputLabel"
-					"text": "Input"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 5"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel7"
-					"border": #LineBorder0
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "inputOptionPane"
-						"wantsInput": true
-						"optionType": 2
-						"message": "Enter whatever you want:"
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
-					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 5"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "inputShowDialogLabel"
-					"optionPane": new FormReference( "inputOptionPane" )
-					"titleLabel": new FormReference( "inputLabel" )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 5"
-				} )
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "inputIconLabel"
-					"text": "Input + icon"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 6"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel8"
-					"border": #LineBorder0
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "inputIconOptionPane"
-						"messageType": 1
-						"wantsInput": true
-						"optionType": 2
-						"message": "Enter something:"
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
-					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 6"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "inputIconShowDialogLabel"
-					"titleLabel": new FormReference( "inputIconLabel" )
-					"optionPane": new FormReference( "inputIconOptionPane" )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 6"
-				} )
-				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "customLabel"
-					"text": "Custom"
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 7"
-				} )
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-					name: "panel6"
-					"border": #LineBorder0
-					add( new FormComponent( "javax.swing.JOptionPane" ) {
-						name: "customOptionPane"
-						"icon": new com.jformdesigner.model.SwingIcon( 2, "Tree.leafIcon" )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "plainShowDialogLabel"
+						"optionPane": new FormReference( "plainOptionPane" )
+						"titleLabel": new FormReference( "plainLabel" )
 						auxiliary() {
 							"JavaCodeGenerator.variableLocal": false
 						}
-					}, new FormLayoutConstraints( class java.lang.String ) {
-						"value": "Center"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 0"
+					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "errorLabel"
+						"text": "Error"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 1"
+					} )
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel2"
+						"border": #LineBorder0
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "errorOptionPane"
+							"messageType": 0
+							"optionType": 2
+							"message": "Your PC ran into a problem. Buy a new one."
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 1"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "errorShowDialogLabel"
+						"titleLabel": new FormReference( "errorLabel" )
+						"optionPane": new FormReference( "errorOptionPane" )
+						auxiliary() {
+							"JavaCodeGenerator.variableLocal": false
+						}
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 1"
+					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "informationLabel"
+						"text": "Information"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 2"
+					} )
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel3"
+						"border": #LineBorder0
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "informationOptionPane"
+							"messageType": 1
+							"optionType": 0
+							"message": "Text with\nmultiple lines\n(use \\n to separate lines)"
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 2"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "informationShowDialogLabel"
+						"optionPane": new FormReference( "informationOptionPane" )
+						"titleLabel": new FormReference( "informationLabel" )
+						auxiliary() {
+							"JavaCodeGenerator.variableLocal": false
+						}
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 2"
+					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "questionLabel"
+						"text": "Question"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 3"
+					} )
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel4"
+						"border": #LineBorder0
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "questionOptionPane"
+							"messageType": 3
+							"optionType": 1
+							"message": "Answer the question. What question? Don't know. Just writing useless text to make this longer than 80 characters."
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 3"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "questionShowDialogLabel"
+						"optionPane": new FormReference( "questionOptionPane" )
+						"titleLabel": new FormReference( "questionLabel" )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 3"
+					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "warningLabel"
+						"text": "Warning"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 4"
+					} )
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel5"
+						"border": #LineBorder0
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "warningOptionPane"
+							"messageType": 2
+							"optionType": 2
+							"message": "<html>I like <b>bold</b>,<br> and I like <i>italic</i>,<br> and I like to have<br> many lines.<br> Lots of lines."
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 4"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "warningShowDialogLabel"
+						"optionPane": new FormReference( "warningOptionPane" )
+						"titleLabel": new FormReference( "warningLabel" )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 4"
+					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "inputLabel"
+						"text": "Input"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 5"
+					} )
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel7"
+						"border": #LineBorder0
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "inputOptionPane"
+							"wantsInput": true
+							"optionType": 2
+							"message": "Enter whatever you want:"
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 5"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "inputShowDialogLabel"
+						"optionPane": new FormReference( "inputOptionPane" )
+						"titleLabel": new FormReference( "inputLabel" )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 5"
+					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "inputIconLabel"
+						"text": "Input + icon"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 6"
+					} )
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel8"
+						"border": #LineBorder0
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "inputIconOptionPane"
+							"messageType": 1
+							"wantsInput": true
+							"optionType": 2
+							"message": "Enter something:"
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 6"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "inputIconShowDialogLabel"
+						"titleLabel": new FormReference( "inputIconLabel" )
+						"optionPane": new FormReference( "inputIconOptionPane" )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 6"
+					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "customLabel"
+						"text": "Custom"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 7"
+					} )
+					add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+						name: "panel6"
+						"border": #LineBorder0
+						add( new FormComponent( "javax.swing.JOptionPane" ) {
+							name: "customOptionPane"
+							"icon": new com.jformdesigner.model.SwingIcon( 2, "Tree.leafIcon" )
+							auxiliary() {
+								"JavaCodeGenerator.variableLocal": false
+							}
+						}, new FormLayoutConstraints( class java.lang.String ) {
+							"value": "Center"
+						} )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 7"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
+						name: "customShowDialogLabel"
+						"optionPane": new FormReference( "customOptionPane" )
+						"titleLabel": new FormReference( "customLabel" )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 2 7"
 					} )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 7"
-				} )
-				add( new FormComponent( "com.formdev.flatlaf.demo.OptionPanePanel$ShowDialogLinkLabel" ) {
-					name: "customShowDialogLabel"
-					"optionPane": new FormReference( "customOptionPane" )
-					"titleLabel": new FormReference( "customLabel" )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 7"
 				} )
+			}, new FormLayoutConstraints( class java.lang.String ) {
+				"value": "Center"
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 0 )

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/extras/ExtrasPanel.java

@@ -0,0 +1,132 @@
+/*
+ * Copyright 2020 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.demo.extras;
+
+import javax.swing.*;
+import com.formdev.flatlaf.extras.*;
+import net.miginfocom.swing.*;
+
+/**
+ * @author Karl Tauber
+ */
+public class ExtrasPanel
+	extends JPanel
+{
+	public ExtrasPanel() {
+		initComponents();
+
+		triStateLabel1.setText( triStateCheckBox1.getState().toString() );
+
+		addSVGIcon( "actions/copy.svg" );
+		addSVGIcon( "actions/colors.svg" );
+		addSVGIcon( "actions/execute.svg" );
+		addSVGIcon( "actions/suspend.svg" );
+		addSVGIcon( "actions/intentionBulb.svg" );
+		addSVGIcon( "actions/quickfixOffBulb.svg" );
+
+		addSVGIcon( "objects/abstractClass.svg" );
+		addSVGIcon( "objects/abstractMethod.svg" );
+		addSVGIcon( "objects/annotationtype.svg" );
+		addSVGIcon( "objects/annotationtype.svg" );
+		addSVGIcon( "objects/css.svg" );
+		addSVGIcon( "objects/javaScript.svg" );
+		addSVGIcon( "objects/xhtml.svg" );
+
+		addSVGIcon( "errorDialog.svg" );
+		addSVGIcon( "informationDialog.svg" );
+		addSVGIcon( "warningDialog.svg" );
+	}
+
+	private void addSVGIcon( String name ) {
+		svgIconsPanel.add( new JLabel( new FlatSVGIcon( "com/formdev/flatlaf/demo/extras/svg/" + name ) ) );
+	}
+
+	private void triStateCheckBox1Changed() {
+		triStateLabel1.setText( triStateCheckBox1.getState().toString() );
+	}
+
+	private void initComponents() {
+		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
+		label4 = new JLabel();
+		label1 = new JLabel();
+		triStateCheckBox1 = new TriStateCheckBox();
+		triStateLabel1 = new JLabel();
+		label2 = new JLabel();
+		svgIconsPanel = new JPanel();
+		label3 = new JLabel();
+
+		//======== this ========
+		setLayout(new MigLayout(
+			"hidemode 3",
+			// columns
+			"[]" +
+			"[]" +
+			"[left]",
+			// rows
+			"[]para" +
+			"[]" +
+			"[]" +
+			"[]"));
+
+		//---- label4 ----
+		label4.setText("Note: Components on this page require the flatlaf-extras library.");
+		add(label4, "cell 0 0 3 1");
+
+		//---- label1 ----
+		label1.setText("TriStateCheckBox:");
+		add(label1, "cell 0 1");
+
+		//---- triStateCheckBox1 ----
+		triStateCheckBox1.setText("three states");
+		triStateCheckBox1.addActionListener(e -> triStateCheckBox1Changed());
+		add(triStateCheckBox1, "cell 1 1");
+
+		//---- triStateLabel1 ----
+		triStateLabel1.setText("text");
+		add(triStateLabel1, "cell 2 1");
+
+		//---- label2 ----
+		label2.setText("SVG Icons:");
+		add(label2, "cell 0 2");
+
+		//======== svgIconsPanel ========
+		{
+			svgIconsPanel.setLayout(new MigLayout(
+				"insets 0,hidemode 3",
+				// columns
+				"[fill]",
+				// rows
+				"[grow,center]"));
+		}
+		add(svgIconsPanel, "cell 1 2 2 1");
+
+		//---- label3 ----
+		label3.setText("The icons may change colors when switching to another theme.");
+		add(label3, "cell 1 3 2 1");
+		// JFormDesigner - End of component initialization  //GEN-END:initComponents
+	}
+
+	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
+	private JLabel label4;
+	private JLabel label1;
+	private TriStateCheckBox triStateCheckBox1;
+	private JLabel triStateLabel1;
+	private JLabel label2;
+	private JPanel svgIconsPanel;
+	private JLabel label3;
+	// JFormDesigner - End of variables declaration  //GEN-END:variables
+}

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/extras/ExtrasPanel.jfd

@@ -0,0 +1,63 @@
+JFDML JFormDesigner: "7.0.1.0.272" Java: "13.0.2" encoding: "UTF-8"
+
+new FormModel {
+	contentType: "form/swing"
+	root: new FormRoot {
+		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
+			"$layoutConstraints": "hidemode 3"
+			"$columnConstraints": "[][][left]"
+			"$rowConstraints": "[]para[][][]"
+		} ) {
+			name: "this"
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label4"
+				"text": "Note: Components on this page require the flatlaf-extras library."
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 0 3 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label1"
+				"text": "TriStateCheckBox:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 1"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.TriStateCheckBox" ) {
+				name: "triStateCheckBox1"
+				"text": "three states"
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "triStateCheckBox1Changed", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "triStateLabel1"
+				"text": "text"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label2"
+				"text": "SVG Icons:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 2"
+			} )
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
+				"$layoutConstraints": "insets 0,hidemode 3"
+				"$columnConstraints": "[fill]"
+				"$rowConstraints": "[grow,center]"
+			} ) {
+				name: "svgIconsPanel"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 2 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label3"
+				"text": "The icons may change colors when switching to another theme."
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 3 2 1"
+			} )
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 0 )
+			"size": new java.awt.Dimension( 500, 300 )
+		} )
+	}
+}

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/intellijthemes/IJThemesPanel.java

@@ -28,7 +28,6 @@ import java.beans.PropertyChangeListener;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.nio.file.Files;
@@ -38,7 +37,6 @@ import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Objects;
-import java.util.Properties;
 import java.util.function.Predicate;
 import javax.swing.*;
 import javax.swing.border.CompoundBorder;
@@ -48,6 +46,7 @@ import com.formdev.flatlaf.FlatDarkLaf;
 import com.formdev.flatlaf.FlatIntelliJLaf;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.FlatLightLaf;
+import com.formdev.flatlaf.FlatPropertiesLaf;
 import com.formdev.flatlaf.IntelliJTheme;
 import com.formdev.flatlaf.demo.DemoPrefs;
 import com.formdev.flatlaf.extras.FlatSVGIcon;
@@ -198,14 +197,14 @@ public class IJThemesPanel
 	}
 
 	private void themesListValueChanged( ListSelectionEvent e ) {
-		if( e.getValueIsAdjusting() || isAdjustingThemesList )
-			return;
-
 		IJThemeInfo themeInfo = themesList.getSelectedValue();
 		boolean bundledTheme = (themeInfo != null && themeInfo.resourceName != null);
 		saveButton.setEnabled( bundledTheme );
 		sourceCodeButton.setEnabled( bundledTheme );
 
+		if( e.getValueIsAdjusting() || isAdjustingThemesList )
+			return;
+
 		EventQueue.invokeLater( () -> {
 			setTheme( themeInfo );
 		} );
@@ -229,7 +228,7 @@ public class IJThemesPanel
 		} else if( themeInfo.themeFile != null ) {
 			try {
 				if( themeInfo.themeFile.getName().endsWith( ".properties" ) ) {
-				    FlatLaf.install( new PropertiesLaf( themeInfo.name, themeInfo.themeFile ) );
+				    FlatLaf.install( new FlatPropertiesLaf( themeInfo.name, themeInfo.themeFile ) );
 				} else
 				    FlatLaf.install( IntelliJTheme.createLaf( new FileInputStream( themeInfo.themeFile ) ) );
 
@@ -342,7 +341,7 @@ public class IJThemesPanel
 		LookAndFeel lookAndFeel = UIManager.getLookAndFeel();
 		String theme = UIManager.getLookAndFeelDefaults().getString( DemoPrefs.THEME_UI_KEY );
 
-		if( theme == null && (lookAndFeel instanceof IntelliJTheme.ThemeLaf || lookAndFeel instanceof PropertiesLaf) )
+		if( theme == null && (lookAndFeel instanceof IntelliJTheme.ThemeLaf || lookAndFeel instanceof FlatPropertiesLaf) )
 			return;
 
 		Predicate<IJThemeInfo> test;
@@ -431,78 +430,4 @@ public class IJThemesPanel
 	private JScrollPane themesScrollPane;
 	private JList<IJThemeInfo> themesList;
 	// JFormDesigner - End of variables declaration  //GEN-END:variables
-
-	//---- class PropertiesLaf ------------------------------------------------
-
-	public static class PropertiesLaf
-		extends FlatLaf
-	{
-		private final String name;
-		private final String baseTheme;
-		private final boolean dark;
-		private final Properties properties;
-
-		public PropertiesLaf( String name, File propertiesFile )
-			throws IOException
-		{
-			this.name = name;
-
-			properties = new Properties();
-			try( InputStream in = new FileInputStream( propertiesFile ) ) {
-				if( in != null )
-					properties.load( in );
-			}
-
-			baseTheme = properties.getProperty( "@baseTheme", "light" );
-			dark = "dark".equalsIgnoreCase( baseTheme ) || "darcula".equalsIgnoreCase( baseTheme );
-		}
-
-		@Override
-		public String getName() {
-			return name;
-		}
-
-		@Override
-		public String getDescription() {
-			return name;
-		}
-
-		@Override
-		public boolean isDark() {
-			return dark;
-		}
-
-		@Override
-		protected ArrayList<Class<?>> getLafClassesForDefaultsLoading() {
-			ArrayList<Class<?>> lafClasses = new ArrayList<>();
-			lafClasses.add( FlatLaf.class );
-			switch( baseTheme.toLowerCase() ) {
-				default:
-				case "light":
-					lafClasses.add( FlatLightLaf.class );
-					break;
-
-				case "dark":
-					lafClasses.add( FlatDarkLaf.class );
-					break;
-
-				case "intellij":
-					lafClasses.add( FlatLightLaf.class );
-					lafClasses.add( FlatIntelliJLaf.class );
-					break;
-
-				case "darcula":
-					lafClasses.add( FlatDarkLaf.class );
-					lafClasses.add( FlatDarculaLaf.class );
-					break;
-			}
-			lafClasses.add( PropertiesLaf.class );
-			return lafClasses;
-		}
-
-		@Override
-		protected Properties getAdditionalDefaults() {
-			return properties;
-		}
-	}
 }

flatlaf-demo/src/main/resources/com/formdev/flatlaf/demo/extras/svg/LICENSE.txt

@@ -0,0 +1,3 @@
+The icons in this folder are from IntelliJ IDEA Community Edition,
+which is licensed under the Apache 2.0 license. Copyright 2000-2019 JetBrains s.r.o.
+See: https://github.com/JetBrains/intellij-community/

flatlaf-demo/src/main/resources/com/formdev/flatlaf/demo/extras/svg/actions/colors.svg

@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <g fill="none" fill-rule="evenodd" transform="translate(2 2)">
+    <rect width="5.5" height="5.5" fill="#59A869"/>
+    <rect width="5.5" height="5.5" x="6.5" fill="#EDA200"/>
+    <rect width="5.5" height="5.5" y="6.5" fill="#389FD6"/>
+    <rect width="5.5" height="5.5" x="6.5" y="6.5" fill="#DB5860"/>
+  </g>
+</svg>

flatlaf-demo/src/main/resources/com/formdev/flatlaf/demo/extras/svg/actions/copy.svg

@@ -1,6 +1,6 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
   <g fill="none" fill-rule="evenodd">
-    <path fill="#AFB1B3" d="M11,3 L4,3 L4,11 L2,11 L2,1 L11,1 L11,3 Z"/>
-    <path fill="#AFB1B3" d="M5,4 L14,4 L14,14 L5,14 L5,4 Z M7,6 L7,7 L12,7 L12,6 L7,6 Z M7,10 L7,11 L12,11 L12,10 L7,10 Z M7,8 L7,9 L12,9 L12,8 L7,8 Z"/>
+    <path fill="#6E6E6E" d="M11,3 L4,3 L4,11 L2,11 L2,1 L11,1 L11,3 Z"/>
+    <path fill="#6E6E6E" d="M5,4 L14,4 L14,14 L5,14 L5,4 Z M7,6 L7,7 L12,7 L12,6 L7,6 Z M7,10 L7,11 L12,11 L12,10 L7,10 Z M7,8 L7,9 L12,9 L12,8 L7,8 Z"/>
   </g>
 </svg>

flatlaf-demo/src/main/resources/com/formdev/flatlaf/demo/extras/svg/actions/execute.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <polygon fill="#59A869" fill-rule="evenodd" points="4 2 14 8 4 14"/>
+</svg>

flatlaf-demo/src/main/resources/com/formdev/flatlaf/demo/extras/svg/actions/intentionBulb.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <g fill="none" fill-rule="evenodd">
+    <rect width="6" height="1" x="5" y="12" fill="#6E6E6E"/>
+    <path fill="#6E6E6E" d="M5.5,14 L10.5,14 L10.5,14 C10.5,14.5522847 10.0522847,15 9.5,15 L6.5,15 C5.94771525,15 5.5,14.5522847 5.5,14 Z"/>
+    <path fill="#EDA200" d="M13,5.2 C13,9.2 11,8.96875 11,11 L5,11 C5,9.03125 3,9.2 3,5.2 C3,2.991 5.23878906,1 8,1 C10.76125,1 13,2.99103125 13,5.2 Z"/>
+  </g>
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