release 0.42

(used to test previous commit)

.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 +1,213 @@
 FlatLaf Change Log
 ==================
 
+## 0.42
+
+#### New features and improvements
+
+- Demo: Improved "SplitPane & Tabs" and "Data Components" tabs.
+- Demo: Menu items "File > Open" and "File > Save As" now show file choosers.
+- InternalFrame: Support draggable border for resizing frame inside of the
+  visible frame border. (issue #121)
+- `FlatUIDefaultsInspector` added (see [FlatLaf Extras](flatlaf-extras)). A
+  simple UI defaults inspector that shows a window with all UI defaults used in
+  current theme (look and feel).
+- Made disabled text color slightly lighter in dark themes for better
+  readability. (issue #174)
+- PasswordField: Support disabling Caps Lock warning icon. (issue #172)
+
+#### Fixed bugs
+
+- TextComponents: Fixed text color of disabled text components in dark themes.
+- Custom window decorations: Fixed wrong window placement when moving window to
+  another screen with different scaling factor. (issue #166)
+- Custom window decorations: Fixed wrong window bounds when resizing window to
+  another screen with different scaling factor. (issue #166)
+- Fixed occasional wrong positioning of heavy weight popups when using multiple
+  screens with different scaling factors. (issue #166)
+- ToolTip: Avoid that tooltip hides owner component. (issue #164)
+
+
+## 0.41
+
+#### New features and improvements
+
+- Added API to register packages or folders where FlatLaf searches for
+  application specific properties files with custom UI defaults (see
+  `FlatLaf.registerCustomDefaultsSource(...)` methods).
+- Demo: Show hint popups to guide users to some features of the FlatLaf Demo
+  application.
+- Extras: `FlatSVGIcon` now allows specifying `ClassLoader` that is used to load
+  SVG file. (issue #163)
+- Smoother transition from old to new theme, independent of UI complexity, when
+  using animated theme change (see [FlatLaf Extras](flatlaf-extras)).
+
+#### Fixed bugs
+
+- Button: "selected" state was not shown. (issue #161)
+- TextArea: Update background color property if enabled or editable state
+  changes in the same way as Swing does it for all other text components. (issue
+  #147)
+- Demo: Fixed restoring last used theme on startup. (regression in 0.39)
+- Custom window decorations: Fixed iconify, maximize and close icon colors if
+  window is inactive.
+- Custom window decorations: Fixed title pane background color in IntelliJ
+  themes if window is inactive.
+- Fixed sub-pixel text rendering in animated theme change (see
+  [FlatLaf Extras](flatlaf-extras)).
+
+#### Other Changes
+
+- Extras: Updated dependency
+  [svgSalamander](https://github.com/JFormDesigner/svgSalamander) to version
+  1.1.2.3.
+
+
+## 0.40
+
+#### New features
+
+- Table: Detect whether component is used in cell editor and automatically
+  disable round border style and reduce cell editor outer border width (used for
+  focus indicator) to zero. (issue #148)
+- ComboBox, Spinner and TextField: Support disabling round border style per
+  component, if globally enabled (set client property `JComponent.roundRect` to
+  `false`). (issue #148)
+
+#### Fixed bugs
+
+- Custom window decorations: Embedded menu bar did not always respond to mouse
+  events after adding menus and when running in JetBrains Runtime. (issue #151)
+- IntelliJ Themes: Fixed NPE in Solarized themes on scroll bar hover.
+
+
+## 0.39
+
+#### New features
+
+- Animated theme change (see [FlatLaf Extras](flatlaf-extras)). Used in Demo.
+- Demo: Added combo box above themes list to show only light or dark themes.
+- IntelliJ Themes:
+  - Added "Arc Dark", "Arc Dark - Orange", "Carbon" and "Cobalt 2" themes.
+  - Replaced "Solarized" themes with much better ones from 4lex4.
+  - Updated "Arc", "One Dark" and "Vuesion" themes.
+- ScrollPane: Enable/disable smooth scrolling per component if client property
+  "JScrollPane.smoothScrolling" is set to a `Boolean` on `JScrollPane`.
+- ScrollBar: Increased minimum thumb size on macOS and Linux from 8 to 18
+  pixels. On Windows, it is now 10 pixels. (issue #131)
+- Button: Support specifying button border width.
+- ComboBox: Changed maximum row count of popup list to 15 (was 20). Set UI value
+  `ComboBox.maximumRowCount` to any integer to use a different value.
+
+#### Fixed bugs
+
+- Custom window decorations: Fixed maximized window bounds when programmatically
+  maximizing window. E.g. restoring window state at startup. (issue #129)
+- InternalFrame: Title pane height was too small when iconify, maximize and
+  close buttons are hidden. (issue #132)
+- ToolTip: Do not show empty tooltip component if tooltip text is an empty
+  string. (issue #134)
+- ToolTip: Fixed truncated text in HTML formatted tooltip on HiDPI displays.
+  (issue #142)
+- ComboBox: Fixed width of popup, which was too small if popup is wider than
+  combo box and vertical scroll bar is visible. (issue #137)
+- MenuItem on macOS: Removed plus characters from accelerator text and made
+  modifier key order conform with macOS standard. (issue #141)
+- FileChooser: Fixed too small text field when renaming a file/directory in Flat
+  IntelliJ/Darcula themes. (issue #143)
+- IntelliJ Themes: Fixed text colors in ProgressBar. (issue #138)
+
+
+## 0.38
+
+- Hide focus indicator when window is inactive.
+- Custom window decorations: Improved/fixed window border color in dark themes.
+- Custom window decorations: Hide window border if window is maximized.
+- Custom window decorations: Center title if menu bar is embedded.
+- Custom window decorations: Cursor of components (e.g. TextField) was not
+  changed. (issue #125)
+- CheckBox: Fixed colors in light IntelliJ themes. (issue #126; regression in
+  0.37)
+- InternalFrame: Use default icon in internal frames. (issue #122)
+
+
+## 0.37
+
+- Custom window decorations (Windows 10 only; PR #108; issues #47 and #82)
+  support:
+  - dark window title panes
+  - embedding menu bar into window title pane
+  - native Windows 10 borders and behavior when running in
+    [JetBrains Runtime 11](https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime)
+    or later (the JRE that IntelliJ IDEA uses)
+- CheckBox and RadioButton: Support changing selected icon style from outline to
+  filled (as in FlatLaf IntelliJ theme) with `UIManager.put(
+  "CheckBox.icon.style", "filled" );`.
+- Button and ToggleButton: Support disabled background color (use UI values
+  `Button.disabledBackground` and `ToggleButton.disabledBackground`). (issue
+  #112)
+- Button and ToggleButton: Support making buttons square (set client property
+  `JButton.squareSize` to `true`). (issue #118)
+- ScrollBar: Support pressed track, thumb and button colors (use UI values
+  `ScrollBar.pressedTrackColor`, `ScrollBar.pressedThumbColor` and
+  `ScrollBar.pressedButtonBackground`). (issue #115)
+- ComboBox: Support changing arrow button style (set UI value
+  `ComboBox.buttonStyle` to `auto` (default), `button` or `none`). (issue #114)
+- Spinner: Support changing arrows button style (set UI value
+  `Spinner.buttonStyle` to `button` (default) or `none`).
+- TableHeader: Support top/bottom/left positioned sort arrow when using
+  [Glazed Lists](https://github.com/glazedlists/glazedlists). (issue #113)
+- Button, CheckBox, RadioButton and ToggleButton: Do not paint focus indicator
+  if `AbstractButton.isFocusPainted()` returns `false`.
+- ComboBox: Increase maximum row count of popup list to 20 (was 8). Set UI value
+  `ComboBox.maximumRowCount` to any integer to use a different value.
+- Fixed/improved vertical position of text when scaled on HiDPI screens on
+  Windows.
+- IntelliJ Themes: Updated Gradianto Themes.
+- IntelliJ Themes: Fixed menu bar and menu item margins in all Material UI Lite
+  themes.
+
+
+## 0.36
+
+- ScrollBar: Made styling more flexible by supporting insets and arc for track
+  and thumb. (issue #103)
+- ScrollBar: Use round thumb on macOS and Linux to make it look similar to
+  native platform scroll bars. (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

README.md

@@ -11,9 +11,9 @@ scales on **HiDPI** displays and runs on Java 8 or newer.
 The look is heavily inspired by **Darcula** and **IntelliJ** themes from
 IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.
 
-![Flat Light Demo](images/FlatLightDemo.png)
+![Flat Light](images/flat_light.png)
 
-![Flat Dark Demo](images/FlatDarkDemo.png)
+![Flat Dark](images/flat_dark.png)
 
 
 IntelliJ Platform Themes
@@ -22,9 +22,7 @@ IntelliJ Platform Themes
 FlatLaf can use 3rd party themes created for IntelliJ Platform (see
 [IntelliJ Themes Pack](flatlaf-intellij-themes)):
 
-![Cyan Light Demo](images/CyanLightDemo.png)
+![IntelliJ Platform Themes](images/intellij_platform_themes.png)
-
-![Dark Purple Demo](images/DarkPurpleDemo.png)
 
 
 Demo
@@ -69,9 +67,10 @@ 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
@@ -81,6 +80,7 @@ Projects using FlatLaf
 - [jclasslib bytecode viewer](https://github.com/ingokegel/jclasslib) 5.5
 - [KeyStore Explorer](https://keystore-explorer.org/) 5.4.3
 - [OWASP Zed Attack Proxy (ZAP)](https://www.zaproxy.org/) (in weekly releases)
+- ![New](images/new.svg) [jAlbum](https://jalbum.net/) 21 (commercial)
 - [XMLmind XML Editor](https://www.xmlmind.com/xmleditor/) 9.3 (commercial)
 - [Total Validator](https://www.totalvalidator.com/) 15 (commercial)
 - [j-lawyer](https://github.com/jlawyerorg/j-lawyer-org)
@@ -97,8 +97,15 @@ Projects using FlatLaf
   [mendelson AS2](https://mendelson-e-c.com/as2/),
   [AS4](https://mendelson-e-c.com/as4/) and
   [OFTP2](https://mendelson-e-c.com/oftp2) (commercial)
-- [MeteoInfo](https://github.com/meteoinfo/MeteoInfo) 2.1.6
+- [MeteoInfo](https://github.com/meteoinfo/MeteoInfo) 2.2
 - [lsfusion platform](https://github.com/lsfusion/platform)
+- [Jes - Die Java-EÜR](https://www.jes-eur.de)
+- [Mapton](https://mapton.org/) 2.0
+  ([source code](https://github.com/trixon/mapton)) based on NetBeans platform
+- [Pseudo Assembler IDE](https://github.com/tomasz-herman/PseudoAssemblerIDE)
+- [Sound Analysis](https://github.com/tomasz-herman/SoundAnalysis)
+- [RemoteLight](https://github.com/Drumber/RemoteLight) - Multifunctional LED
+  Control Software
 - and more...
 
 

build.gradle.kts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-val releaseVersion = "0.34"
+val releaseVersion = "0.42"
-val developmentVersion = "0.35-SNAPSHOT"
+val developmentVersion = "0.43-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/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/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,377 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
+org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
+org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
+org.eclipse.jdt.core.formatter.align_variable_declarations_on_columns=false
+org.eclipse.jdt.core.formatter.align_with_spaces=false
+org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation=0
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_enum_constant=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_explicit_constructor_call=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_method_invocation=16
+org.eclipse.jdt.core.formatter.alignment_for_arguments_in_qualified_allocation_expression=16
+org.eclipse.jdt.core.formatter.alignment_for_assignment=0
+org.eclipse.jdt.core.formatter.alignment_for_bitwise_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_compact_if=16
+org.eclipse.jdt.core.formatter.alignment_for_compact_loops=16
+org.eclipse.jdt.core.formatter.alignment_for_conditional_expression=48
+org.eclipse.jdt.core.formatter.alignment_for_conditional_expression_chain=0
+org.eclipse.jdt.core.formatter.alignment_for_enum_constants=16
+org.eclipse.jdt.core.formatter.alignment_for_expressions_in_array_initializer=16
+org.eclipse.jdt.core.formatter.alignment_for_expressions_in_for_loop_header=0
+org.eclipse.jdt.core.formatter.alignment_for_logical_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_method_declaration=0
+org.eclipse.jdt.core.formatter.alignment_for_module_statements=16
+org.eclipse.jdt.core.formatter.alignment_for_multiple_fields=16
+org.eclipse.jdt.core.formatter.alignment_for_multiplicative_operator=16
+org.eclipse.jdt.core.formatter.alignment_for_parameterized_type_references=0
+org.eclipse.jdt.core.formatter.alignment_for_parameters_in_constructor_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_parameters_in_method_declaration=16
+org.eclipse.jdt.core.formatter.alignment_for_record_components=16
+org.eclipse.jdt.core.formatter.alignment_for_relational_operator=0
+org.eclipse.jdt.core.formatter.alignment_for_resources_in_try=80
+org.eclipse.jdt.core.formatter.alignment_for_selector_in_method_invocation=16
+org.eclipse.jdt.core.formatter.alignment_for_shift_operator=0
+org.eclipse.jdt.core.formatter.alignment_for_string_concatenation=16
+org.eclipse.jdt.core.formatter.alignment_for_superclass_in_type_declaration=33
+org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_enum_declaration=33
+org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_record_declaration=33
+org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_type_declaration=33
+org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_constructor_declaration=32
+org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_method_declaration=32
+org.eclipse.jdt.core.formatter.alignment_for_type_arguments=0
+org.eclipse.jdt.core.formatter.alignment_for_type_parameters=0
+org.eclipse.jdt.core.formatter.alignment_for_union_type_in_multicatch=16
+org.eclipse.jdt.core.formatter.blank_lines_after_imports=1
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+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.join_lines_in_comments=true
+org.eclipse.jdt.core.formatter.join_wrapped_lines=true
+org.eclipse.jdt.core.formatter.keep_annotation_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_anonymous_type_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_code_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_enum_constant_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_enum_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_if_then_body_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_lambda_body_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_loop_body_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_method_body_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_record_constructor_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_record_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_simple_do_while_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_simple_for_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_simple_getter_setter_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_simple_while_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_type_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.lineSplit=120
+org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.never_indent_line_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.number_of_blank_lines_after_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_end_of_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_end_of_method_body=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_before_code_block=0
+org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve=1
+org.eclipse.jdt.core.formatter.parentheses_positions_in_annotation=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_catch_clause=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_enum_constant_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_for_statment=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_if_while_statement=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_lambda_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_method_delcaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_method_invocation=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_record_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_switch_statement=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_try_clause=common_lines
+org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line=true
+org.eclipse.jdt.core.formatter.tabulation.char=tab
+org.eclipse.jdt.core.formatter.tabulation.size=4
+org.eclipse.jdt.core.formatter.text_block_indentation=0
+org.eclipse.jdt.core.formatter.use_on_off_tags=false
+org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations=false
+org.eclipse.jdt.core.formatter.wrap_before_additive_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_assignment_operator=false
+org.eclipse.jdt.core.formatter.wrap_before_bitwise_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_conditional_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_logical_operator=false
+org.eclipse.jdt.core.formatter.wrap_before_multiplicative_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_or_operator_multicatch=true
+org.eclipse.jdt.core.formatter.wrap_before_relational_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_shift_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_string_concatenation=true
+org.eclipse.jdt.core.formatter.wrap_outer_expressions_when_nested=true
+org.eclipse.jdt.core.javaFormatter=org.eclipse.jdt.core.defaultJavaFormatter

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

@@ -0,0 +1,3 @@
+eclipse.preferences.version=1
+formatter_profile=_FlatLaf
+formatter_settings_version=19

flatlaf-core/build.gradle.kts

@@ -16,58 +16,20 @@
 
 plugins {
 	`java-library`
-	`maven-publish`
+	`flatlaf-module-info`
-	id( "com.jfrog.bintray" )
+	`flatlaf-java9`
-	id( "com.jfrog.artifactory" )
+	`flatlaf-publish`
 }
 
-if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
+java {
-	sourceSets {
+	withSourcesJar()
-		create( "java9" ) {
+	withJavadocJar()
-			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" ) )
-			}
-		}
-	}
 }
 
 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 );
 		}
@@ -76,105 +38,24 @@ tasks {
 	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 {
+flatlafPublish {
-	publications {
+	artifactId = "flatlaf"
-		create<MavenPublication>( "maven" ) {
+	name = "FlatLaf"
-			artifactId = "flatlaf"
+	description = "Flat Look and Feel"
-			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" )
-	} )
 }

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>
@@ -77,10 +96,19 @@ public interface FlatClientProperties
 	 */
 	String SELECTED_STATE_INDETERMINATE = "indeterminate";
 
+	/**
+	 * Specifies whether the button preferred size will be made square (quadratically).
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.JButton} and {@link javax.swing.JToggleButton}
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 */
+	String SQUARE_SIZE = "JButton.squareSize";
+
 	/**
 	 * 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 +121,52 @@ 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>
@@ -109,6 +183,15 @@ public interface FlatClientProperties
 	 */
 	String PROGRESS_BAR_SQUARE = "JProgressBar.square";
 
+	/**
+	 * Specifies whether the menu bar is embedded into the title pane if custom
+	 * window decorations are enabled. Default is {@code true}.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 */
+	String MENU_BAR_EMBEDDED = "JRootPane.menuBarEmbedded";
+
 	/**
 	 * Specifies whether the decrease/increase arrow buttons of a scrollbar are shown.
 	 * <p>
@@ -117,6 +200,14 @@ public interface FlatClientProperties
 	 */
 	String SCROLL_BAR_SHOW_BUTTONS = "JScrollBar.showButtons";
 
+	/**
+	 * Specifies whether the scroll pane uses smooth scrolling.
+	 * <p>
+	 * <strong>Component</strong> {{@link javax.swing.JScrollPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 */
+	String SCROLL_PANE_SMOOTH_SCROLLING = "JScrollPane.smoothScrolling";
+
 	/**
 	 * Specifies whether separators are shown between tabs.
 	 * <p>
@@ -223,6 +314,15 @@ public interface FlatClientProperties
 		return (value instanceof Boolean) ? (boolean) value : defaultValue;
 	}
 
+	/**
+	 * Checks whether a client property of a component is a {@link Boolean} and returns its value.
+	 * If the client property is not set, or not a {@link Boolean}, defaultValue is returned.
+	 */
+	static Boolean clientPropertyBooleanStrict( JComponent c, String key, Boolean defaultValue ) {
+		Object value = c.getClientProperty( key );
+		return (value instanceof Boolean) ? (Boolean) value : defaultValue;
+	}
+
 	/**
 	 * Checks whether a client property of a component is an integer and returns its value.
 	 * If the client property is not set, or not an integer, defaultValue is returned.
@@ -240,4 +340,14 @@ 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/FlatInputMaps.java

@@ -22,9 +22,11 @@ import javax.swing.KeyStroke;
 import javax.swing.LookAndFeel;
 import javax.swing.UIDefaults;
 import javax.swing.UIDefaults.LazyValue;
+import javax.swing.UIManager;
 import javax.swing.plaf.InputMapUIResource;
 import com.formdev.flatlaf.util.SystemInfo;
 import static javax.swing.text.DefaultEditorKit.*;
+import java.util.function.BooleanSupplier;
 
 /**
  * @author Karl Tauber
@@ -35,7 +37,7 @@ class FlatInputMaps
 		initBasicInputMaps( defaults );
 		initTextComponentInputMaps( defaults );
 
-		if( SystemInfo.IS_MAC )
+		if( SystemInfo.isMacOS )
 			initMacInputMaps( defaults );
 	}
 
@@ -59,7 +61,7 @@ class FlatInputMaps
 			mac( "alt KP_DOWN", null ), "togglePopup"
 		);
 
-		if( !SystemInfo.IS_MAC ) {
+		if( !SystemInfo.isMacOS ) {
 			modifyInputMap( defaults, "FileChooser.ancestorInputMap",
 				"F2", "editFileName",
 				"BACK_SPACE", "Go Up"
@@ -81,8 +83,11 @@ class FlatInputMaps
 			"shift ctrl TAB", "navigatePrevious"
 		);
 
-		modifyInputMap( defaults, "Table.ancestorInputMap",
+		// swap Home/End with Ctrl+Home/End to make it consistent with List and Tree
-			// swap to make it consistent with List and Tree
+		modifyInputMap( () -> {
+				return UIManager.getBoolean( "Table.consistentHomeEndKeyBehavior" );
+			},
+			defaults, "Table.ancestorInputMap",
 			"HOME", "selectFirstRow",
 			"END", "selectLastRow",
 			"shift HOME", "selectFirstRowExtendSelection",
@@ -93,7 +98,7 @@ class FlatInputMaps
 			mac( "shift ctrl END", null ), "selectLastColumnExtendSelection"
 		);
 
-		if( !SystemInfo.IS_MAC ) {
+		if( !SystemInfo.isMacOS ) {
 			modifyInputMap( defaults, "Tree.focusInputMap",
 				"ADD", "expand",
 				"SUBTRACT", "collapse"
@@ -164,7 +169,7 @@ class FlatInputMaps
 			"control shift O", "toggle-componentOrientation", // DefaultEditorKit.toggleComponentOrientation
 		};
 
-		Object[] macCommonTextComponentBindings = SystemInfo.IS_MAC ? new Object[] {
+		Object[] macCommonTextComponentBindings = SystemInfo.isMacOS ? new Object[] {
 			// move caret one character (without selecting text)
 			"ctrl B", backwardAction,
 			"ctrl F", forwardAction,
@@ -211,7 +216,7 @@ class FlatInputMaps
 			"ENTER", JTextField.notifyAction,
 		};
 
-		Object[] macSingleLineTextComponentBindings = SystemInfo.IS_MAC ? new Object[] {
+		Object[] macSingleLineTextComponentBindings = SystemInfo.isMacOS ? new Object[] {
 			// move caret to line begin/end (without selecting text)
 			"UP", beginLineAction,
 			"DOWN", endLineAction,
@@ -289,7 +294,7 @@ class FlatInputMaps
 			mac( "ctrl SPACE", "meta SPACE" ), "activate-link-action",
 		};
 
-		Object[] macMultiLineTextComponentBindings = SystemInfo.IS_MAC ? new Object[] {
+		Object[] macMultiLineTextComponentBindings = SystemInfo.isMacOS ? new Object[] {
 			// move caret one line (without selecting text)
 			"ctrl N", downAction,
 			"ctrl P", upAction,
@@ -574,12 +579,16 @@ class FlatInputMaps
 	}
 
 	private static void modifyInputMap( UIDefaults defaults, String key, Object... bindings ) {
-		// Note: not using `defaults.get(key)` here because this would resolve the lazy value
+		modifyInputMap( null, defaults, key, bindings );
-		defaults.put( key, new LazyModifyInputMap( defaults.remove( key ), bindings ) );
+	}
+
+	private static void modifyInputMap( BooleanSupplier condition, UIDefaults defaults, String key, Object... bindings ) {
+		// Note: not using `defaults.get(key)` here because this would resolve a lazy value
+		defaults.put( key, new LazyModifyInputMap( condition, defaults.remove( key ), bindings ) );
 	}
 
 	private static <T> T mac( T value, T macValue ) {
-		return SystemInfo.IS_MAC ? macValue : value;
+		return SystemInfo.isMacOS ? macValue : value;
 	}
 
 	//---- class LazyInputMapEx -----------------------------------------------
@@ -614,10 +623,12 @@ class FlatInputMaps
 	private static class LazyModifyInputMap
 		implements LazyValue
 	{
+		private final BooleanSupplier condition;
 		private final Object baseInputMap;
 		private final Object[] bindings;
 
-		LazyModifyInputMap( Object baseInputMap, Object[] bindings ) {
+		LazyModifyInputMap( BooleanSupplier condition, Object baseInputMap, Object[] bindings ) {
+			this.condition = condition;
 			this.baseInputMap = baseInputMap;
 			this.bindings = bindings;
 		}
@@ -629,6 +640,9 @@ class FlatInputMaps
 				? (InputMap) ((LazyValue)baseInputMap).createValue( table )
 				: (InputMap) baseInputMap;
 
+			if( condition != null && !condition.getAsBoolean() )
+				return inputMap;
+
 			// modify input map (replace or remove)
 			for( int i = 0; i < bindings.length; i += 2 ) {
 				KeyStroke keyStroke = KeyStroke.getKeyStroke( (String) bindings[i] );

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

@@ -29,6 +29,7 @@ import java.awt.image.ImageFilter;
 import java.awt.image.ImageProducer;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import java.io.File;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
@@ -43,6 +44,8 @@ import javax.swing.BorderFactory;
 import javax.swing.Icon;
 import javax.swing.ImageIcon;
 import javax.swing.JComponent;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
 import javax.swing.LookAndFeel;
 import javax.swing.PopupFactory;
 import javax.swing.SwingUtilities;
@@ -56,6 +59,8 @@ 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.ui.JBRCustomDecorations;
 import com.formdev.flatlaf.util.GrayFilter;
 import com.formdev.flatlaf.util.MultiResolutionImageSupport;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -72,16 +77,23 @@ public abstract class FlatLaf
 	static final Logger LOG = Logger.getLogger( FlatLaf.class.getName() );
 	private static final String DESKTOPFONTHINTS = "awt.font.desktophints";
 
+	private static List<Object> customDefaultsSources;
+
 	private String desktopPropertyName;
+	private String desktopPropertyName2;
 	private PropertyChangeListener desktopPropertyListener;
 
 	private static boolean aquaLoaded;
 	private static boolean updateUIPending;
 
+	private PopupFactory oldPopupFactory;
 	private MnemonicHandler mnemonicHandler;
 
 	private Consumer<UIDefaults> postInitialization;
 
+	private Boolean oldFrameWindowDecorated;
+	private Boolean oldDialogWindowDecorated;
+
 	public static boolean install( LookAndFeel newLookAndFeel ) {
 		try {
 			UIManager.setLookAndFeel( newLookAndFeel );
@@ -107,6 +119,45 @@ public abstract class FlatLaf
 
 	public abstract boolean isDark();
 
+	/**
+	 * Checks whether the current look and feel is dark.
+	 */
+	public static boolean isLafDark() {
+		LookAndFeel lookAndFeel = UIManager.getLookAndFeel();
+		return lookAndFeel instanceof FlatLaf && ((FlatLaf)lookAndFeel).isDark();
+	}
+
+	/**
+	 * Returns whether FlatLaf supports custom window decorations.
+	 * This depends on the operating system and on the used Java runtime.
+	 * <p>
+	 * To use custom window decorations in your application, enable them with
+	 * following code (before creating any frames or dialogs). Then custom window
+	 * decorations are only enabled if this method returns {@code true}.
+	 * <pre>
+	 * JFrame.setDefaultLookAndFeelDecorated( true );
+	 * JDialog.setDefaultLookAndFeelDecorated( true );
+	 * </pre>
+	 * <p>
+	 * Returns {@code true} on Windows 10, {@code false} otherwise.
+	 * <p>
+	 * Return also {@code false} if running on Windows 10 in
+	 * <a href="https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime">JetBrains Runtime 11 (or later)</a>
+	 * (<a href="https://github.com/JetBrains/JetBrainsRuntime">source code on github</a>)
+	 * and JBR supports custom window decorations. In this case, JBR custom decorations
+	 * are enabled if {@link JFrame#isDefaultLookAndFeelDecorated()} or
+	 * {@link JDialog#isDefaultLookAndFeelDecorated()} return {@code true}.
+	 */
+	@Override
+	public boolean getSupportsWindowDecorations() {
+		if( SystemInfo.isJetBrainsJVM_11_orLater &&
+			SystemInfo.isWindows_10_orLater &&
+			JBRCustomDecorations.isSupported() )
+		  return false;
+
+		return SystemInfo.isWindows_10_orLater;
+	}
+
 	@Override
 	public boolean isNativeLookAndFeel() {
 		return false;
@@ -139,30 +190,38 @@ public abstract class FlatLaf
 
 	@Override
 	public void initialize() {
-		if( SystemInfo.IS_MAC )
+		if( SystemInfo.isMacOS )
 			initializeAqua();
 
 		super.initialize();
 
+		// 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 ) {
+		if( SystemInfo.isWindows ) {
 			// Windows 10 allows increasing font size independent of scaling:
 			//   Settings > Ease of Access > Display > Make text bigger (100% - 225%)
 			desktopPropertyName = "win.messagebox.font";
-		} else if( SystemInfo.IS_LINUX ) {
+		} else if( SystemInfo.isLinux ) {
+			// 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 ) {
@@ -173,6 +232,8 @@ public abstract class FlatLaf
 			};
 			Toolkit toolkit = Toolkit.getDefaultToolkit();
 			toolkit.addPropertyChangeListener( desktopPropertyName, desktopPropertyListener );
+			if( desktopPropertyName2 != null )
+				toolkit.addPropertyChangeListener( desktopPropertyName2, desktopPropertyListener );
 			toolkit.addPropertyChangeListener( DESKTOPFONTHINTS, desktopPropertyListener );
 		}
 
@@ -187,6 +248,16 @@ public abstract class FlatLaf
 					String.format( "a { color: #%06x; }", linkColor.getRGB() & 0xffffff ) );
 			}
 		};
+
+		// enable/disable window decorations, but only if system property is either
+		// "true" or "false"; in other cases it is not changed
+		Boolean useWindowDecorations = FlatSystemProperties.getBooleanStrict( FlatSystemProperties.USE_WINDOW_DECORATIONS, null );
+		if( useWindowDecorations != null ) {
+			oldFrameWindowDecorated = JFrame.isDefaultLookAndFeelDecorated();
+			oldDialogWindowDecorated = JDialog.isDefaultLookAndFeelDecorated();
+			JFrame.setDefaultLookAndFeelDecorated( useWindowDecorations );
+			JDialog.setDefaultLookAndFeelDecorated( useWindowDecorations );
+		}
 	}
 
 	@Override
@@ -195,11 +266,20 @@ 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;
 		}
 
+		// uninstall popup factory
+		if( oldPopupFactory != null ) {
+			PopupFactory.setSharedInstance( oldPopupFactory );
+			oldPopupFactory = null;
+		}
+
 		// uninstall mnemonic handler
 		if( mnemonicHandler != null ) {
 			mnemonicHandler.uninstall();
@@ -210,6 +290,14 @@ public abstract class FlatLaf
 		new HTMLEditorKit().getStyleSheet().addRule( "a { color: blue; }" );
 		postInitialization = null;
 
+		// restore enable/disable window decorations
+		if( oldFrameWindowDecorated != null ) {
+			JFrame.setDefaultLookAndFeelDecorated( oldFrameWindowDecorated );
+			JDialog.setDefaultLookAndFeelDecorated( oldDialogWindowDecorated );
+			oldFrameWindowDecorated = null;
+			oldDialogWindowDecorated = null;
+		}
+
 		super.uninitialize();
 	}
 
@@ -230,7 +318,7 @@ public abstract class FlatLaf
 		String aquaLafClassName = "com.apple.laf.AquaLookAndFeel";
 		BasicLookAndFeel aquaLaf;
 		try {
-			if( SystemInfo.IS_JAVA_9_OR_LATER ) {
+			if( SystemInfo.isJava_9_orLater ) {
 				Method m = UIManager.class.getMethod( "createLookAndFeel", String.class );
 				aquaLaf = (BasicLookAndFeel) m.invoke( null, "Mac OS X" );
 			} else
@@ -256,12 +344,13 @@ public abstract class FlatLaf
 	public UIDefaults getDefaults() {
 		UIDefaults defaults = super.getDefaults();
 
-		// add Metal resource bundle, which is required for FlatFileChooserUI
+		// add resource bundle for localized texts
-		defaults.addResourceBundle( "com.sun.swing.internal.plaf.metal.resources.metal" );
+		defaults.addResourceBundle( "com.formdev.flatlaf.resources.Bundle" );
 
 		// initialize some defaults (for overriding) that are used in UI delegates,
 		// but are not set in BasicLookAndFeel
 		putDefaults( defaults, defaults.getColor( "control" ),
+			"Button.disabledBackground",
 			"EditorPane.disabledBackground",
 			"EditorPane.inactiveBackground",
 			"FormattedTextField.disabledBackground",
@@ -271,7 +360,8 @@ public abstract class FlatLaf
 			"TextArea.inactiveBackground",
 			"TextField.disabledBackground",
 			"TextPane.disabledBackground",
-			"TextPane.inactiveBackground" );
+			"TextPane.inactiveBackground",
+			"ToggleButton.disabledBackground" );
 		putDefaults( defaults, defaults.getColor( "textInactiveText" ),
 			"Button.disabledText",
 			"CheckBox.disabledText",
@@ -304,7 +394,7 @@ 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.isMacOS && Boolean.getBoolean( "apple.laf.useScreenMenuBar" ) ) {
 			defaults.put( "MenuBarUI", "com.apple.laf.AquaMenuBarUI" );
 
 			// add defaults necessary for AquaMenuBarUI
@@ -348,14 +438,17 @@ public abstract class FlatLaf
 	private void initFonts( UIDefaults defaults ) {
 		FontUIResource uiFont = null;
 
-		if( SystemInfo.IS_WINDOWS ) {
+		if( SystemInfo.isWindows ) {
 			Font winFont = (Font) Toolkit.getDefaultToolkit().getDesktopProperty( "win.messagebox.font" );
 			if( winFont != null )
 				uiFont = createCompositeFont( winFont.getFamily(), winFont.getStyle(), winFont.getSize() );
 
-		} else if( SystemInfo.IS_MAC ) {
+		} else if( SystemInfo.isMacOS ) {
 			String fontName;
-			if( SystemInfo.IS_MAC_OS_10_11_EL_CAPITAN_OR_LATER ) {
+			if( SystemInfo.isMacOS_10_15_Catalina_orLater ) {
+				// use Helvetica Neue font
+				fontName = "Helvetica Neue";
+			} else if( SystemInfo.isMacOS_10_11_ElCapitan_orLater ) {
 				// use San Francisco Text font
 				fontName = ".SF NS Text";
 			} else {
@@ -365,7 +458,7 @@ public abstract class FlatLaf
 
 			uiFont = createCompositeFont( fontName, Font.PLAIN, 13 );
 
-		} else if( SystemInfo.IS_LINUX ) {
+		} else if( SystemInfo.isLinux ) {
 			Font font = LinuxFontPolicy.getFont();
 			uiFont = (font instanceof FontUIResource) ? (FontUIResource) font : new FontUIResource( font );
 		}
@@ -397,7 +490,7 @@ 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 );
 	}
 
@@ -425,7 +518,7 @@ public abstract class FlatLaf
 	}
 
 	private void putAATextInfo( UIDefaults defaults ) {
-		if( SystemInfo.IS_JAVA_9_OR_LATER ) {
+		if( SystemInfo.isJava_9_orLater ) {
 			Object desktopHints = Toolkit.getDefaultToolkit().getDesktopProperty( DESKTOPFONTHINTS );
 			if( desktopHints instanceof Map ) {
 				@SuppressWarnings( "unchecked" )
@@ -462,6 +555,87 @@ public abstract class FlatLaf
 			defaults.put( key, value );
 	}
 
+	static List<Object> getCustomDefaultsSources() {
+		return customDefaultsSources;
+	}
+
+	/**
+	 * Registers a package where FlatLaf searches for properties files with custom UI defaults.
+	 * <p>
+	 * This can be used to specify application specific UI defaults that override UI values
+	 * of existing themes or to define own UI values used in custom controls.
+	 * <p>
+	 * There may be multiple properties files in that package for multiple themes.
+	 * The properties file name must match the used theme class names.
+	 * E.g. {@code FlatLightLaf.properties} for class {@link FlatLightLaf}
+	 * or {@code FlatDarkLaf.properties} for class {@link FlatDarkLaf}.
+	 * {@code FlatLaf.properties} is loaded first for all themes.
+	 * <p>
+	 * These properties files are loaded after theme and addon properties files
+	 * and can therefore override all UI defaults.
+	 * <p>
+	 * Invoke this method before setting the look and feel.
+	 *
+	 * @param packageName a package name (e.g. "com.myapp.resources")
+	 */
+	public static void registerCustomDefaultsSource( String packageName ) {
+		registerCustomDefaultsSource( packageName, null );
+	}
+
+	public static void unregisterCustomDefaultsSource( String packageName ) {
+		unregisterCustomDefaultsSource( packageName, null );
+	}
+
+	/**
+	 * Registers a package where FlatLaf searches for properties files with custom UI defaults.
+	 * <p>
+	 * See {@link #registerCustomDefaultsSource(String)} for details.
+	 *
+	 * @param packageName a package name (e.g. "com.myapp.resources")
+	 * @param classLoader a class loader used to find resources, or {@code null}
+	 */
+	public static void registerCustomDefaultsSource( String packageName, ClassLoader classLoader ) {
+		if( customDefaultsSources == null )
+			customDefaultsSources = new ArrayList<>();
+		customDefaultsSources.add( packageName );
+		customDefaultsSources.add( classLoader );
+	}
+
+	public static void unregisterCustomDefaultsSource( String packageName, ClassLoader classLoader ) {
+		if( customDefaultsSources == null )
+			return;
+
+		int size = customDefaultsSources.size();
+		for( int i = 0; i < size - 1; i++ ) {
+			Object source = customDefaultsSources.get( i );
+			if( packageName.equals( source ) && customDefaultsSources.get( i + 1 ) == classLoader ) {
+				customDefaultsSources.remove( i + 1 );
+				customDefaultsSources.remove( i );
+				break;
+			}
+		}
+	}
+
+	/**
+	 * Registers a folder where FlatLaf searches for properties files with custom UI defaults.
+	 * <p>
+	 * See {@link #registerCustomDefaultsSource(String)} for details.
+	 *
+	 * @param folder a folder
+	 */
+	public static void registerCustomDefaultsSource( File folder ) {
+		if( customDefaultsSources == null )
+			customDefaultsSources = new ArrayList<>();
+		customDefaultsSources.add( folder );
+	}
+
+	public static void unregisterCustomDefaultsSource( File folder ) {
+		if( customDefaultsSources == null )
+			return;
+
+		customDefaultsSources.remove( folder );
+	}
+
 	private static void reSetLookAndFeel() {
 		EventQueue.invokeLater( () -> {
 			LookAndFeel lookAndFeel = UIManager.getLookAndFeel();

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/FlatSystemProperties.java

@@ -0,0 +1,126 @@
+/*
+ * 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 javax.swing.JDialog;
+import javax.swing.JFrame;
+
+/**
+ * Defines/documents own system properties used in FlatLaf.
+ *
+ * @author Karl Tauber
+ */
+public interface FlatSystemProperties
+{
+	/**
+	 * Specifies a custom scale factor used to scale the UI.
+	 * <p>
+	 * If Java runtime scales (Java 9 or later), this scale factor is applied on top
+	 * of the Java system scale factor. Java 8 does not scale and this scale factor
+	 * replaces the user scale factor that FlatLaf computes based on the font.
+	 * To replace the Java 9+ system scale factor, use system property "sun.java2d.uiScale",
+	 * which has the same syntax as this one.
+	 * <p>
+	 * <strong>Allowed Values</strong> e.g. {@code 1.5}, {@code 1.5x}, {@code 150%} or {@code 144dpi} (96dpi is 100%)<br>
+	 */
+	String UI_SCALE = "flatlaf.uiScale";
+
+	/**
+	 * Specifies whether user scaling mode is enabled.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 */
+	String UI_SCALE_ENABLED = "flatlaf.uiScale.enabled";
+
+	/**
+	 * Specifies whether Ubuntu font should be used on Ubuntu Linux.
+	 * By default, if not running in a JetBrains Runtime, the Liberation Sans font
+	 * is used because there are rendering issues (in Java) with Ubuntu fonts.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code false}
+	 */
+	String USE_UBUNTU_FONT = "flatlaf.useUbuntuFont";
+
+	/**
+	 * Specifies whether custom look and feel window decorations should be used
+	 * when creating {@code JFrame} or {@code JDialog}.
+	 * <p>
+	 * If this system property is set, FlatLaf invokes {@link JFrame#setDefaultLookAndFeelDecorated(boolean)}
+	 * and {@link JDialog#setDefaultLookAndFeelDecorated(boolean)} on LaF initialization.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> none
+	 */
+	String USE_WINDOW_DECORATIONS = "flatlaf.useWindowDecorations";
+
+	/**
+	 * Specifies whether JetBrains Runtime custom window decorations should be used
+	 * when creating {@code JFrame} or {@code JDialog}.
+	 * Requires that the application runs in a
+	 * <a href="https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime">JetBrains Runtime</a>
+	 * (based on OpenJDK).
+	 * <p>
+	 * Setting this to {@code true} forces using JetBrains Runtime custom window decorations
+	 * even if they are not enabled by the application.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 */
+	String USE_JETBRAINS_CUSTOM_DECORATIONS = "flatlaf.useJetBrainsCustomDecorations";
+
+	/**
+	 * Specifies whether menubar is embedded into custom window decorations.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 */
+	String MENUBAR_EMBEDDED = "flatlaf.menuBarEmbedded";
+
+	/**
+	 * Specifies whether vertical text position is corrected when UI is scaled on HiDPI screens.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 */
+	String USE_TEXT_Y_CORRECTION = "flatlaf.useTextYCorrection";
+
+	/**
+	 * Checks whether a system property is set and returns {@code true} if its value
+	 * is {@code "true"} (case-insensitive), otherwise it returns {@code false}.
+	 * If the system property is not set, {@code defaultValue} is returned.
+	 */
+	static boolean getBoolean( String key, boolean defaultValue ) {
+		String value = System.getProperty( key );
+		return (value != null) ? Boolean.parseBoolean( value ) : defaultValue;
+	}
+
+	/**
+	 * Checks whether a system property is set and returns {@code Boolean.TRUE} if its value
+	 * is {@code "true"} (case-insensitive) or returns {@code Boolean.FALSE} if its value
+	 * is {@code "false"} (case-insensitive). Otherwise {@code defaultValue} is returned.
+	 */
+	static Boolean getBooleanStrict( String key, Boolean defaultValue ) {
+		String value = System.getProperty( key );
+		if( "true".equalsIgnoreCase( value ) )
+			return Boolean.TRUE;
+		if( "false".equalsIgnoreCase( value ) )
+			return Boolean.FALSE;
+		return defaultValue;
+	}
+}

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

@@ -147,6 +147,15 @@ public class IntelliJTheme
 		applyColorPalette( defaults );
 		applyCheckBoxColors( defaults );
 
+		// copy values
+		for( Map.Entry<String, String> e : uiKeyCopying.entrySet() )
+			defaults.put( e.getKey(), defaults.get( e.getValue() ) );
+
+		// IDEA does not paint button background if disabled, but FlatLaf does
+		Object panelBackground = defaults.get( "Panel.background" );
+		defaults.put( "Button.disabledBackground", panelBackground );
+		defaults.put( "ToggleButton.disabledBackground", panelBackground );
+
 		// IDEA uses a SVG icon for the help button, but paints the background with Button.startBackground and Button.endBackground
 		Object helpButtonBackground = defaults.get( "Button.startBackground" );
 		Object helpButtonBorderColor = defaults.get( "Button.startBorderColor" );
@@ -156,7 +165,7 @@ public class IntelliJTheme
 			helpButtonBorderColor = defaults.get( "Button.borderColor" );
 		defaults.put( "HelpButton.background", helpButtonBackground );
 		defaults.put( "HelpButton.borderColor", helpButtonBorderColor );
-		defaults.put( "HelpButton.disabledBackground", defaults.get( "Panel.background" ) );
+		defaults.put( "HelpButton.disabledBackground", panelBackground );
 		defaults.put( "HelpButton.disabledBorderColor", defaults.get( "Button.disabledBorderColor" ) );
 		defaults.put( "HelpButton.focusedBorderColor", defaults.get( "Button.focusedBorderColor" ) );
 		defaults.put( "HelpButton.focusedBackground", defaults.get( "Button.focusedBackground" ) );
@@ -254,6 +263,9 @@ public class IntelliJTheme
 			for( Map.Entry<String, Object> e : ((Map<String, Object>)value).entrySet() )
 				apply( key + '.' + e.getKey(), e.getValue(), defaults, defaultsKeysCache, uiKeys );
 		} else {
+			if( "".equals( value ) )
+				return; // ignore empty value
+
 			uiKeys.add( key );
 
 			// fix ComboBox size and Spinner border in all Material UI Lite themes
@@ -407,6 +419,10 @@ public class IntelliJTheme
 
 			String newKey = checkboxKeyMapping.get( key );
 			if( newKey != null ) {
+				String checkBoxIconPrefix = "CheckBox.icon.";
+				if( !dark && newKey.startsWith( checkBoxIconPrefix ) )
+					newKey = "CheckBox.icon[filled].".concat( newKey.substring( checkBoxIconPrefix.length() ) );
+
 				ColorUIResource color = toColor( (String) value );
 				if( color != null ) {
 					defaults.put( newKey, color );
@@ -439,17 +455,24 @@ public class IntelliJTheme
 
 		// remove hover and pressed colors
 		if( checkboxModified ) {
+			defaults.remove( "CheckBox.icon.focusWidth" );
 			defaults.remove( "CheckBox.icon.hoverBorderColor" );
 			defaults.remove( "CheckBox.icon.focusedBackground" );
 			defaults.remove( "CheckBox.icon.hoverBackground" );
 			defaults.remove( "CheckBox.icon.pressedBackground" );
+			defaults.remove( "CheckBox.icon.selectedFocusedBackground" );
 			defaults.remove( "CheckBox.icon.selectedHoverBackground" );
 			defaults.remove( "CheckBox.icon.selectedPressedBackground" );
-		}
 
-		// copy values
+			defaults.remove( "CheckBox.icon[filled].focusWidth" );
-		for( Map.Entry<String, String> e : uiKeyCopying.entrySet() )
+			defaults.remove( "CheckBox.icon[filled].hoverBorderColor" );
-			defaults.put( e.getKey(), defaults.get( e.getValue() ) );
+			defaults.remove( "CheckBox.icon[filled].focusedBackground" );
+			defaults.remove( "CheckBox.icon[filled].hoverBackground" );
+			defaults.remove( "CheckBox.icon[filled].pressedBackground" );
+			defaults.remove( "CheckBox.icon[filled].selectedFocusedBackground" );
+			defaults.remove( "CheckBox.icon[filled].selectedHoverBackground" );
+			defaults.remove( "CheckBox.icon[filled].selectedPressedBackground" );
+		}
 	}
 
 	private static Map<String, String> uiKeyMapping = new HashMap<>();
@@ -467,14 +490,35 @@ 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" );
 
+		// Menu
+		uiKeyMapping.put( "Menu.border",                "Menu.margin" );
+		uiKeyMapping.put( "MenuItem.border",            "MenuItem.margin" );
+		uiKeyCopying.put( "CheckBoxMenuItem.margin",    "MenuItem.margin" );
+		uiKeyCopying.put( "RadioButtonMenuItem.margin", "MenuItem.margin" );
+		uiKeyMapping.put( "PopupMenu.border",           "PopupMenu.borderInsets" );
+
+		// IDEA uses List.selectionBackground also for menu selection
+		uiKeyCopying.put( "Menu.selectionBackground",                "List.selectionBackground" );
+		uiKeyCopying.put( "MenuItem.selectionBackground",            "List.selectionBackground" );
+		uiKeyCopying.put( "CheckBoxMenuItem.selectionBackground",    "List.selectionBackground" );
+		uiKeyCopying.put( "RadioButtonMenuItem.selectionBackground", "List.selectionBackground" );
+
 		// ProgressBar
 		uiKeyMapping.put( "ProgressBar.background",    "" ); // ignore
 		uiKeyMapping.put( "ProgressBar.foreground",    "" ); // ignore
 		uiKeyMapping.put( "ProgressBar.trackColor",    "ProgressBar.background" );
 		uiKeyMapping.put( "ProgressBar.progressColor", "ProgressBar.foreground" );
+		uiKeyCopying.put( "ProgressBar.selectionForeground", "ProgressBar.background" );
+		uiKeyCopying.put( "ProgressBar.selectionBackground", "ProgressBar.foreground" );
 
 		// ScrollBar
 		uiKeyMapping.put( "ScrollBar.trackColor", "ScrollBar.track" );
@@ -486,6 +530,11 @@ public class IntelliJTheme
 		// Slider
 		uiKeyMapping.put( "Slider.trackWidth", "" ); // ignore (used in Material Theme UI Lite)
 
+		// TitlePane
+		uiKeyCopying.put( "TitlePane.inactiveBackground",     "TitlePane.background" );
+		uiKeyMapping.put( "TitlePane.infoForeground",         "TitlePane.foreground" );
+		uiKeyMapping.put( "TitlePane.inactiveInfoForeground", "TitlePane.inactiveForeground" );
+
 		for( Map.Entry<String, String> e : uiKeyMapping.entrySet() )
 			uiKeyInverseMapping.put( e.getValue(), e.getKey() );
 
@@ -500,7 +549,7 @@ public class IntelliJTheme
 		checkboxKeyMapping.put( "Checkbox.Border.Default",      "CheckBox.icon.borderColor" );
 		checkboxKeyMapping.put( "Checkbox.Border.Disabled",     "CheckBox.icon.disabledBorderColor" );
 		checkboxKeyMapping.put( "Checkbox.Focus.Thin.Default",  "CheckBox.icon.focusedBorderColor" );
-		checkboxKeyMapping.put( "Checkbox.Focus.Wide",          "CheckBox.icon.focusedColor" );
+		checkboxKeyMapping.put( "Checkbox.Focus.Wide",          "CheckBox.icon.focusColor" );
 		checkboxKeyMapping.put( "Checkbox.Foreground.Disabled", "CheckBox.icon.disabledCheckmarkColor" );
 		checkboxKeyMapping.put( "Checkbox.Background.Selected", "CheckBox.icon.selectedBackground" );
 		checkboxKeyMapping.put( "Checkbox.Border.Selected",     "CheckBox.icon.selectedBorderColor" );

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

@@ -39,7 +39,7 @@ import com.formdev.flatlaf.util.UIScale;
 class LinuxFontPolicy
 {
 	static Font getFont() {
-		return SystemInfo.IS_KDE ? getKDEFont() : getGnomeFont();
+		return SystemInfo.isKDE ? getKDEFont() : getGnomeFont();
 	}
 
 	/**
@@ -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.isJetBrainsJVM &&
+			!FlatSystemProperties.getBoolean( FlatSystemProperties.USE_UBUNTU_FONT, false ) )
+		  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

@@ -71,13 +71,13 @@ class MnemonicHandler
 	@Override
 	public boolean postProcessKeyEvent( KeyEvent e ) {
 		int keyCode = e.getKeyCode();
-		if( SystemInfo.IS_MAC ) {
+		if( SystemInfo.isMacOS ) {
 			// 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 )
+			if( SystemInfo.isWindows )
 				return processKeyEventOnWindows( e );
 
 			if( keyCode == KeyEvent.VK_ALT )

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

@@ -19,14 +19,18 @@ package com.formdev.flatlaf;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Insets;
+import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Map.Entry;
 import java.util.Properties;
 import java.util.function.Function;
 import java.util.logging.Level;
@@ -40,6 +44,7 @@ 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;
@@ -114,6 +119,46 @@ class UIDefaultsLoader
 					addonClassLoaders.add( addonClassLoader );
 			}
 
+			// load custom properties files (usually provides by applications)
+			List<Object> customDefaultsSources = FlatLaf.getCustomDefaultsSources();
+			int size = (customDefaultsSources != null) ? customDefaultsSources.size() : 0;
+			for( int i = 0; i < size; i++ ) {
+				Object source = customDefaultsSources.get( i );
+				if( source instanceof String && i + 1 < size ) {
+					// load from package in classloader
+					String packageName = (String) source;
+					ClassLoader classLoader = (ClassLoader) customDefaultsSources.get( ++i );
+
+					// use class loader also for instantiating classes specified in values
+					if( classLoader != null && !addonClassLoaders.contains( classLoader ) )
+						addonClassLoaders.add( classLoader );
+
+					packageName = packageName.replace( '.', '/' );
+					if( classLoader == null )
+						classLoader = FlatLaf.class.getClassLoader();
+
+					for( Class<?> lafClass : lafClasses ) {
+						String propertiesName = packageName + '/' + lafClass.getSimpleName() + ".properties";
+						try( InputStream in = classLoader.getResourceAsStream( propertiesName ) ) {
+							if( in != null )
+								properties.load( in );
+						}
+					}
+				} else if( source instanceof File ) {
+					// load from folder
+					File folder = (File) source;
+					for( Class<?> lafClass : lafClasses ) {
+						File propertiesFile = new File( folder, lafClass.getSimpleName() + ".properties" );
+						if( !propertiesFile.isFile() )
+							continue;
+
+						try( InputStream in = new FileInputStream( propertiesFile ) ) {
+							properties.load( in );
+						}
+					}
+				}
+			}
+
 			// add additional defaults
 			if( additionalDefaults != null )
 				properties.putAll( additionalDefaults );
@@ -143,9 +188,9 @@ class UIDefaultsLoader
 
 				// handle platform specific properties
 				String platformPrefix =
-					SystemInfo.IS_WINDOWS ? "[win]" :
+					SystemInfo.isWindows ? "[win]" :
-					SystemInfo.IS_MAC ? "[mac]" :
+					SystemInfo.isMacOS ? "[mac]" :
-					SystemInfo.IS_LINUX ? "[linux]" : "[unknown]";
+					SystemInfo.isLinux ? "[linux]" : "[unknown]";
 				for( String key : platformSpecificKeys ) {
 					Object value = properties.remove( key );
 					if( key.startsWith( platformPrefix ) )
@@ -153,45 +198,45 @@ class UIDefaultsLoader
 				}
 			}
 
-			Function<String, String> resolver = value -> {
+			// get (and remove) globals, which override all other defaults that end with same suffix
-				return resolveValue( properties, value );
+			HashMap<String, String> globals = new HashMap<>();
-			};
+			Iterator<Entry<Object, Object>> it = properties.entrySet().iterator();
-
+			while( it.hasNext() ) {
-			// get globals, which override all other defaults that end with same suffix
+				Entry<Object, Object> e = it.next();
-			HashMap<String, Object> globals = new HashMap<>();
-			for( Map.Entry<Object, Object> e : properties.entrySet() ) {
 				String key = (String) e.getKey();
-				if( !key.startsWith( GLOBAL_PREFIX ) )
+				if( key.startsWith( GLOBAL_PREFIX ) ) {
-					continue;
+					globals.put( key.substring( GLOBAL_PREFIX.length() ), (String) e.getValue() );
-
+					it.remove();
-				String value = resolveValue( properties, (String) e.getValue() );
-				try {
-					globals.put( key.substring( GLOBAL_PREFIX.length() ), parseValue( key, value, resolver, addonClassLoaders ) );
-				} catch( RuntimeException ex ) {
-					logParseError( Level.SEVERE, key, value, ex );
 				}
 			}
 
 			// override UI defaults with globals
-			for( Object key : defaults.keySet() ) {
+			for( Object okey : defaults.keySet() ) {
-				if( key instanceof String && ((String)key).contains( "." ) ) {
+				if( okey instanceof String && ((String)okey).contains( "." ) ) {
-					String skey = (String) key;
+					String key = (String) okey;
-					String globalKey = skey.substring( skey.lastIndexOf( '.' ) + 1 );
+					String globalKey = key.substring( key.lastIndexOf( '.' ) + 1 );
-					Object globalValue = globals.get( globalKey );
+					String globalValue = globals.get( globalKey );
-					if( globalValue != null )
+					if( globalValue != null && !properties.containsKey( key ) )
-						defaults.put( key, globalValue );
+						properties.put( key, globalValue );
 				}
 			}
 
-			// add non-global properties to UI defaults
+			Function<String, String> propertiesGetter = key -> {
+				return properties.getProperty( key );
+			};
+			Function<String, String> resolver = value -> {
+				return resolveValue( value, propertiesGetter );
+			};
+
+			// parse and add properties to UI defaults
 			for( Map.Entry<Object, Object> e : properties.entrySet() ) {
 				String key = (String) e.getKey();
-				if( key.startsWith( VARIABLE_PREFIX ) || key.startsWith( GLOBAL_PREFIX ) )
+				if( key.startsWith( VARIABLE_PREFIX ) )
 					continue;
 
-				String value = resolveValue( properties, (String) e.getValue() );
+				String value = resolveValue( (String) e.getValue(), propertiesGetter );
 				try {
-					defaults.put( key, parseValue( key, value, resolver, addonClassLoaders ) );
+					defaults.put( key, parseValue( key, value, null, resolver, addonClassLoaders ) );
 				} catch( RuntimeException ex ) {
 					logParseError( Level.SEVERE, key, value, ex );
 				}
@@ -205,7 +250,10 @@ class UIDefaultsLoader
 		FlatLaf.LOG.log( level, "FlatLaf: Failed to parse: '" + key + '=' + value + '\'', ex );
 	}
 
-	private static String resolveValue( Properties properties, String value ) {
+	static String resolveValue( String value, Function<String, String> propertiesGetter ) {
+		value = value.trim();
+		String value0 = value;
+
 		if( value.startsWith( PROPERTY_PREFIX ) )
 			value = value.substring( PROPERTY_PREFIX.length() );
 		else if( !value.startsWith( VARIABLE_PREFIX ) )
@@ -217,7 +265,7 @@ class UIDefaultsLoader
 			optional = true;
 		}
 
-		String newValue = properties.getProperty( value );
+		String newValue = propertiesGetter.apply( value );
 		if( newValue == null ) {
 			if( optional )
 				return "null";
@@ -225,29 +273,40 @@ class UIDefaultsLoader
 			throw new IllegalArgumentException( "variable or property '" + value + "' not found" );
 		}
 
-		return resolveValue( properties, newValue );
+		if( newValue.equals( value0 ) )
+			throw new IllegalArgumentException( "endless recursion in variable or property '" + value + "'" );
+
+		return resolveValue( newValue, propertiesGetter );
 	}
 
-	private enum ValueType { UNKNOWN, STRING, CHARACTER, INTEGER, FLOAT, BORDER, ICON, INSETS, DIMENSION, COLOR,
+	enum ValueType { UNKNOWN, STRING, BOOLEAN, CHARACTER, INTEGER, FLOAT, BORDER, ICON, INSETS, DIMENSION, COLOR,
-		SCALEDINTEGER, SCALEDFLOAT, SCALEDINSETS, SCALEDDIMENSION, INSTANCE, CLASS, GRAYFILTER }
+		SCALEDINTEGER, SCALEDFLOAT, SCALEDINSETS, SCALEDDIMENSION, INSTANCE, CLASS, GRAYFILTER, NULL, LAZY }
+
+	private static ValueType[] tempResultValueType = new ValueType[1];
 
 	static Object parseValue( String key, String value ) {
-		return parseValue( key, value, v -> v, Collections.emptyList() );
+		return parseValue( key, value, null, v -> v, Collections.emptyList() );
 	}
 
-	private static Object parseValue( String key, String value, Function<String, String> resolver, List<ClassLoader> addonClassLoaders ) {
+	static Object parseValue( String key, String value, ValueType[] resultValueType,
+		Function<String, String> resolver, List<ClassLoader> addonClassLoaders )
+	{
+		if( resultValueType == null )
+			resultValueType = tempResultValueType;
+
 		value = value.trim();
 
 		// null, false, true
 		switch( value ) {
-			case "null":	return null;
+			case "null":	resultValueType[0] = ValueType.NULL; return null;
-			case "false":	return false;
+			case "false":	resultValueType[0] = ValueType.BOOLEAN; return false;
-			case "true":	return true;
+			case "true":	resultValueType[0] = ValueType.BOOLEAN; return true;
 		}
 
 		// check for function "lazy"
 		//     Syntax: lazy(uiKey)
 		if( value.startsWith( "lazy(" ) && value.endsWith( ")" ) ) {
+			resultValueType[0] = ValueType.LAZY;
 			String uiKey = value.substring( 5, value.length() - 1 ).trim();
 			return (LazyValue) t -> {
 				return lazyUIManagerGet( uiKey );
@@ -300,6 +359,8 @@ class UIDefaultsLoader
 				valueType = ValueType.GRAYFILTER;
 		}
 
+		resultValueType[0] = valueType;
+
 		// parse value
 		switch( valueType ) {
 			case STRING:		return value;
@@ -322,20 +383,27 @@ class UIDefaultsLoader
 			default:
 				// colors
 				Object color = parseColorOrFunction( value, resolver, false );
-				if( color != null )
+				if( color != null ) {
+					resultValueType[0] = ValueType.COLOR;
 					return color;
+				}
 
 				// integer
 				Integer integer = parseInteger( value, false );
-				if( integer != null )
+				if( integer != null ) {
+					resultValueType[0] = ValueType.INTEGER;
 					return integer;
+				}
 
 				// float
 				Float f = parseFloat( value, false );
-				if( f != null )
+				if( f != null ) {
+					resultValueType[0] = ValueType.FLOAT;
 					return f;
+				}
 
 				// string
+				resultValueType[0] = ValueType.STRING;
 				return value;
 		}
 	}
@@ -511,8 +579,10 @@ class UIDefaultsLoader
 			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 "lighten":		return parseColorHSLIncreaseDecrease( 2, true, params, resolver, reportError );
-			case "darken":		return parseColorLightenOrDarken( false, 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 + "'" );
@@ -565,13 +635,14 @@ 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,
+	private static Object parseColorHSLIncreaseDecrease( int hslIndex, boolean increase,
-		Function<String, String> resolver, boolean reportError )
+		List<String> params, Function<String, String> resolver, boolean reportError )
 	{
 		String colorStr = params.get( 0 );
 		int amount = parsePercentage( params.get( 1 ) );
@@ -586,16 +657,15 @@ 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
+		// create function
-			? new ColorFunctions.Lighten( amount, relative, autoInverse )
+		ColorFunction function = new ColorFunctions.HSLIncreaseDecrease(
-			: new ColorFunctions.Darken( amount, relative, autoInverse );
+			hslIndex, increase, amount, relative, autoInverse );
-
-		if( derived ) {
-			ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver, reportError );
-			return new DerivedColor( ColorFunctions.applyFunctions( color, function ), function );
-		}
 
 		if( lazy ) {
 			return (LazyValue) t -> {
@@ -606,8 +676,31 @@ class UIDefaultsLoader
 			};
 		}
 
-		ColorUIResource color = (ColorUIResource) parseColorOrFunction( resolver.apply( colorStr ), resolver, reportError );
+		// parse base color
-		return new ColorUIResource( ColorFunctions.applyFunctions( color, function ) );
+		String resolvedColorStr = resolver.apply( colorStr );
+		ColorUIResource baseColor = (ColorUIResource) parseColorOrFunction( resolvedColorStr, resolver, reportError );
+		if( baseColor == null )
+			return null;
+
+		// 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 ) {

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

@@ -36,25 +36,28 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  *       is painted outside of the icon bounds. Make sure that the checkbox
  *       has margins, which are equal or greater than focusWidth.
  *
+ * @uiDefault CheckBox.icon.style						String	optional; "outline"/null (default) or "filled"
  * @uiDefault Component.focusWidth						int
  * @uiDefault Component.focusColor						Color
- * @uiDefault CheckBox.icon.focusedColor				Color	optional; defaults to Component.focusColor
+ * @uiDefault CheckBox.icon.focusWidth					int		optional; defaults to Component.focusWidth
+ * @uiDefault CheckBox.icon.focusColor					Color	optional; defaults to Component.focusColor
  * @uiDefault CheckBox.icon.borderColor					Color
- * @uiDefault CheckBox.icon.disabledBorderColor			Color
- * @uiDefault CheckBox.icon.selectedBorderColor			Color
- * @uiDefault CheckBox.icon.focusedBorderColor			Color
- * @uiDefault CheckBox.icon.hoverBorderColor			Color	optional
- * @uiDefault CheckBox.icon.selectedFocusedBorderColor	Color	optional
  * @uiDefault CheckBox.icon.background					Color
- * @uiDefault CheckBox.icon.disabledBackground			Color
+ * @uiDefault CheckBox.icon.selectedBorderColor			Color
- * @uiDefault CheckBox.icon.focusedBackground			Color	optional
- * @uiDefault CheckBox.icon.hoverBackground				Color	optional
- * @uiDefault CheckBox.icon.pressedBackground			Color	optional
  * @uiDefault CheckBox.icon.selectedBackground			Color
- * @uiDefault CheckBox.icon.selectedHoverBackground		Color	optional
- * @uiDefault CheckBox.icon.selectedPressedBackground	Color	optional
  * @uiDefault CheckBox.icon.checkmarkColor				Color
+ * @uiDefault CheckBox.icon.disabledBorderColor			Color
+ * @uiDefault CheckBox.icon.disabledBackground			Color
  * @uiDefault CheckBox.icon.disabledCheckmarkColor		Color
+ * @uiDefault CheckBox.icon.focusedBorderColor			Color
+ * @uiDefault CheckBox.icon.focusedBackground			Color	optional
+ * @uiDefault CheckBox.icon.selectedFocusedBorderColor	Color	optional
+ * @uiDefault CheckBox.icon.selectedFocusedBackground	Color	optional
+ * @uiDefault CheckBox.icon.hoverBorderColor			Color	optional
+ * @uiDefault CheckBox.icon.hoverBackground				Color	optional
+ * @uiDefault CheckBox.icon.selectedHoverBackground		Color	optional
+ * @uiDefault CheckBox.icon.pressedBackground			Color	optional
+ * @uiDefault CheckBox.icon.selectedPressedBackground	Color	optional
  * @uiDefault CheckBox.arc								int
  *
  * @author Karl Tauber
@@ -62,27 +65,62 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatCheckBoxIcon
 	extends FlatAbstractIcon
 {
-	public final int focusWidth = UIManager.getInt( "Component.focusWidth" );
+	protected final String style = UIManager.getString( "CheckBox.icon.style" );
-	protected final Color focusColor = FlatUIUtils.getUIColor( "CheckBox.icon.focusedColor",
+	public final int focusWidth = getUIInt( "CheckBox.icon.focusWidth",
+		UIManager.getInt( "Component.focusWidth" ), style );
+	protected final Color focusColor = FlatUIUtils.getUIColor( "CheckBox.icon.focusColor",
 		UIManager.getColor( "Component.focusColor" ) );
 	protected final int arc = FlatUIUtils.getUIInt( "CheckBox.arc", 2 );
 
-	protected final Color borderColor = UIManager.getColor( "CheckBox.icon.borderColor" );
+	// enabled
-	protected final Color disabledBorderColor = UIManager.getColor( "CheckBox.icon.disabledBorderColor" );
+	protected final Color borderColor = getUIColor( "CheckBox.icon.borderColor", style );
-	protected final Color selectedBorderColor = UIManager.getColor( "CheckBox.icon.selectedBorderColor" );
+	protected final Color background = getUIColor( "CheckBox.icon.background", style );
-	protected final Color focusedBorderColor = UIManager.getColor( "CheckBox.icon.focusedBorderColor" );
+	protected final Color selectedBorderColor = getUIColor( "CheckBox.icon.selectedBorderColor", style );
-	protected final Color hoverBorderColor = UIManager.getColor( "CheckBox.icon.hoverBorderColor" );
+	protected final Color selectedBackground = getUIColor( "CheckBox.icon.selectedBackground", style );
-	protected final Color selectedFocusedBorderColor = UIManager.getColor( "CheckBox.icon.selectedFocusedBorderColor" );
+	protected final Color checkmarkColor = getUIColor( "CheckBox.icon.checkmarkColor", style );
-	protected final Color background = UIManager.getColor( "CheckBox.icon.background" );
+
-	protected final Color disabledBackground = UIManager.getColor( "CheckBox.icon.disabledBackground" );
+	// disabled
-	protected final Color focusedBackground = UIManager.getColor( "CheckBox.icon.focusedBackground" );
+	protected final Color disabledBorderColor = getUIColor( "CheckBox.icon.disabledBorderColor", style );
-	protected final Color hoverBackground = UIManager.getColor( "CheckBox.icon.hoverBackground" );
+	protected final Color disabledBackground = getUIColor( "CheckBox.icon.disabledBackground", style );
-	protected final Color pressedBackground = UIManager.getColor( "CheckBox.icon.pressedBackground" );
+	protected final Color disabledCheckmarkColor = getUIColor( "CheckBox.icon.disabledCheckmarkColor", style );
-	protected final Color selectedBackground = UIManager.getColor( "CheckBox.icon.selectedBackground" );
+
-	protected final Color selectedHoverBackground = UIManager.getColor( "CheckBox.icon.selectedHoverBackground" );
+	// focused
-	protected final Color selectedPressedBackground = UIManager.getColor( "CheckBox.icon.selectedPressedBackground" );
+	protected final Color focusedBorderColor = getUIColor( "CheckBox.icon.focusedBorderColor", style );
-	protected final Color checkmarkColor = UIManager.getColor( "CheckBox.icon.checkmarkColor" );
+	protected final Color focusedBackground = getUIColor( "CheckBox.icon.focusedBackground", style );
-	protected final Color disabledCheckmarkColor = UIManager.getColor( "CheckBox.icon.disabledCheckmarkColor" );
+	protected final Color selectedFocusedBorderColor = getUIColor( "CheckBox.icon.selectedFocusedBorderColor", style );
+	protected final Color selectedFocusedBackground = getUIColor( "CheckBox.icon.selectedFocusedBackground", style );
+	protected final Color selectedFocusedCheckmarkColor = getUIColor( "CheckBox.icon.selectedFocusedCheckmarkColor", style );
+
+	// hover
+	protected final Color hoverBorderColor = getUIColor( "CheckBox.icon.hoverBorderColor", style );
+	protected final Color hoverBackground = getUIColor( "CheckBox.icon.hoverBackground", style );
+	protected final Color selectedHoverBackground = getUIColor( "CheckBox.icon.selectedHoverBackground", style );
+
+	// pressed
+	protected final Color pressedBackground = getUIColor( "CheckBox.icon.pressedBackground", style );
+	protected final Color selectedPressedBackground = getUIColor( "CheckBox.icon.selectedPressedBackground", style );
+
+	protected static Color getUIColor( String key, String style ) {
+		if( style != null ) {
+			Color color = UIManager.getColor( styleKey( key, style ) );
+			if( color != null )
+				return color;
+		}
+		return UIManager.getColor( key );
+	}
+
+	protected static int getUIInt( String key, int defaultValue, String style ) {
+		if( style != null ) {
+			Object value = UIManager.get( styleKey( key, style ) );
+			if( value instanceof Integer )
+				return (Integer) value;
+		}
+		return FlatUIUtils.getUIInt( key, defaultValue );
+	}
+
+	private static String styleKey( String key, String style ) {
+		return key.replace( ".icon.", ".icon[" + style + "]." );
+	}
 
 	static final int ICON_SIZE = 15;
 
@@ -94,9 +132,10 @@ public class FlatCheckBoxIcon
 	protected void paintIcon( Component c, Graphics2D g2 ) {
 		boolean indeterminate = c instanceof JComponent && clientPropertyEquals( (JComponent) c, SELECTED_STATE, SELECTED_STATE_INDETERMINATE );
 		boolean selected = indeterminate || (c instanceof AbstractButton && ((AbstractButton)c).isSelected());
+		boolean isFocused = FlatUIUtils.isPermanentFocusOwner( c );
 
 		// paint focused border
-		if( FlatUIUtils.isPermanentFocusOwner( c ) && focusWidth > 0 ) {
+		if( isFocused && focusWidth > 0 && FlatButtonUI.isFocusPainted( c ) ) {
 			g2.setColor( focusColor );
 			paintFocusBorder( g2 );
 		}
@@ -111,18 +150,22 @@ 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 && selectedFocusedBackground != null) ? selectedFocusedBackground : focusedBackground,
-			selected && selectedHoverBackground != null ? selectedHoverBackground : hoverBackground,
+			(selected && selectedHoverBackground != null) ? selectedHoverBackground : hoverBackground,
-			selected && selectedPressedBackground != null ? selectedPressedBackground : pressedBackground ),
+			(selected && selectedPressedBackground != null) ? selectedPressedBackground : pressedBackground ),
-			background );
+			background ) );
 		paintBackground( g2 );
 
 		// paint checkmark
 		if( selected || indeterminate ) {
-			g2.setColor( c.isEnabled() ? checkmarkColor : disabledCheckmarkColor );
+			g2.setColor( c.isEnabled()
+				? ((selected && isFocused && selectedFocusedCheckmarkColor != null)
+					? selectedFocusedCheckmarkColor
+					: checkmarkColor)
+				: disabledCheckmarkColor );
 			if( indeterminate )
 				paintIndeterminate( g2 );
 			else

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

@@ -67,14 +67,14 @@ public class FlatCheckBoxMenuItemIcon
 		g2.draw( path );
 	}
 
-	private Color getCheckmarkColor( Component c ) {
+	protected Color getCheckmarkColor( Component c ) {
 		if( c instanceof JMenuItem && ((JMenuItem)c).isArmed() && !isUnderlineSelection() )
 			return selectionForeground;
 
 		return c.isEnabled() ? checkmarkColor : disabledCheckmarkColor;
 	}
 
-	private boolean isUnderlineSelection() {
+	protected 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

@@ -85,7 +85,7 @@ public class FlatHelpButtonIcon
 		boolean focused = FlatUIUtils.isPermanentFocusOwner( c );
 
 		// paint focused border
-		if( focused ) {
+		if( focused && FlatButtonUI.isFocusPainted( c ) ) {
 			g2.setColor( focusColor );
 			g2.fill( new Ellipse2D.Float( 0.5f, 0.5f, iconSize - 1, iconSize - 1 ) );
 		}
@@ -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.buttonSize					Dimension
- * @uiDefault InternalFrame.buttonPressedBackground		Color
+ * @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

@@ -65,14 +65,14 @@ public class FlatMenuArrowIcon
 		}
 	}
 
-	private Color getArrowColor( Component c ) {
+	protected Color getArrowColor( Component c ) {
 		if( c instanceof JMenu && ((JMenu)c).isSelected() && !isUnderlineSelection() )
 			return selectionForeground;
 
 		return c.isEnabled() ? arrowColor : disabledArrowColor;
 	}
 
-	private boolean isUnderlineSelection() {
+	protected 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/FlatRadioButtonIcon.java

@@ -18,7 +18,6 @@ package com.formdev.flatlaf.icons;
 
 import java.awt.Graphics2D;
 import java.awt.geom.Ellipse2D;
-import com.formdev.flatlaf.ui.FlatUIUtils;
 
 /**
  * Icon for {@link javax.swing.JRadioButton}.
@@ -34,7 +33,7 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
 public class FlatRadioButtonIcon
 	extends FlatCheckBoxIcon
 {
-	protected final int centerDiameter = FlatUIUtils.getUIInt( "RadioButton.icon.centerDiameter", 8 );
+	protected final int centerDiameter = getUIInt( "RadioButton.icon.centerDiameter", 8, style );
 
 	@Override
 	protected void paintFocusBorder( Graphics2D g2 ) {

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

@@ -0,0 +1,76 @@
+/*
+ * 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.icons;
+
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Graphics2D;
+import javax.swing.UIManager;
+import com.formdev.flatlaf.ui.FlatButtonUI;
+import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.HiDPIUtils;
+
+/**
+ * Base class for window icons.
+ *
+ * @uiDefault TitlePane.buttonSize						Dimension
+ * @uiDefault TitlePane.buttonHoverBackground			Color
+ * @uiDefault TitlePane.buttonPressedBackground			Color
+ *
+ * @author Karl Tauber
+ */
+public abstract class FlatWindowAbstractIcon
+	extends FlatAbstractIcon
+{
+	private final Color hoverBackground;
+	private final Color pressedBackground;
+
+	public FlatWindowAbstractIcon() {
+		this( UIManager.getDimension( "TitlePane.buttonSize" ),
+			UIManager.getColor( "TitlePane.buttonHoverBackground" ),
+			UIManager.getColor( "TitlePane.buttonPressedBackground" ) );
+	}
+
+	public FlatWindowAbstractIcon( Dimension size, Color hoverBackground, Color pressedBackground ) {
+		super( size.width, size.height, null );
+		this.hoverBackground = hoverBackground;
+		this.pressedBackground = pressedBackground;
+	}
+
+	@Override
+	protected void paintIcon( Component c, Graphics2D g ) {
+		paintBackground( c, g );
+
+		g.setColor( getForeground( c ) );
+		HiDPIUtils.paintAtScale1x( g, 0, 0, width, height, this::paintIconAt1x );
+	}
+
+	protected abstract void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor );
+
+	protected void paintBackground( Component c, Graphics2D g ) {
+		Color background = FlatButtonUI.buttonStateColor( c, null, null, null, hoverBackground, pressedBackground );
+		if( background != null ) {
+			g.setColor( FlatUIUtils.deriveColor( background, c.getBackground() ) );
+			g.fillRect( 0, 0, width, height );
+		}
+	}
+
+	protected Color getForeground( Component c ) {
+		return c.getForeground();
+	}
+}

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

@@ -0,0 +1,70 @@
+/*
+ * 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.icons;
+
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Graphics2D;
+import java.awt.geom.Line2D;
+import java.awt.geom.Path2D;
+import javax.swing.UIManager;
+import com.formdev.flatlaf.ui.FlatButtonUI;
+
+/**
+ * "close" icon for windows (frames and dialogs).
+ *
+ * @uiDefault TitlePane.closeHoverBackground			Color
+ * @uiDefault TitlePane.closePressedBackground			Color
+ * @uiDefault TitlePane.closeHoverForeground			Color
+ * @uiDefault TitlePane.closePressedForeground			Color
+ *
+ * @author Karl Tauber
+ */
+public class FlatWindowCloseIcon
+	extends FlatWindowAbstractIcon
+{
+	private final Color hoverForeground = UIManager.getColor( "TitlePane.closeHoverForeground" );
+	private final Color pressedForeground = UIManager.getColor( "TitlePane.closePressedForeground" );
+
+	public FlatWindowCloseIcon() {
+		super( UIManager.getDimension( "TitlePane.buttonSize" ),
+			UIManager.getColor( "TitlePane.closeHoverBackground" ),
+			UIManager.getColor( "TitlePane.closePressedBackground" ) );
+	}
+
+	@Override
+	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+		int iwh = (int) (10 * scaleFactor);
+		int ix = x + ((width - iwh) / 2);
+		int iy = y + ((height - iwh) / 2);
+		int ix2 = ix + iwh - 1;
+		int iy2 = iy + iwh - 1;
+		int thickness = (int) scaleFactor;
+
+		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
+		path.append( new Line2D.Float( ix, iy, ix2, iy2 ), false );
+		path.append( new Line2D.Float( ix, iy2, ix2, iy ), false );
+		g.setStroke( new BasicStroke( thickness ) );
+		g.draw( path );
+	}
+
+	@Override
+	protected Color getForeground( Component c ) {
+		return FlatButtonUI.buttonStateColor( c, c.getForeground(), null, null, hoverForeground, pressedForeground );
+	}
+}

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

@@ -0,0 +1,41 @@
+/*
+ * 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.icons;
+
+import java.awt.Graphics2D;
+
+/**
+ * "iconify" icon for windows (frames and dialogs).
+ *
+ * @author Karl Tauber
+ */
+public class FlatWindowIconifyIcon
+	extends FlatWindowAbstractIcon
+{
+	public FlatWindowIconifyIcon() {
+	}
+
+	@Override
+	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+		int iw = (int) (10 * scaleFactor);
+		int ih = (int) scaleFactor;
+		int ix = x + ((width - iw) / 2);
+		int iy = y + ((height - ih) / 2);
+
+		g.fillRect( ix, iy, iw, ih );
+	}
+}

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

@@ -0,0 +1,42 @@
+/*
+ * 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.icons;
+
+import java.awt.Graphics2D;
+import com.formdev.flatlaf.ui.FlatUIUtils;
+
+/**
+ * "maximize" icon for windows (frames and dialogs).
+ *
+ * @author Karl Tauber
+ */
+public class FlatWindowMaximizeIcon
+	extends FlatWindowAbstractIcon
+{
+	public FlatWindowMaximizeIcon() {
+	}
+
+	@Override
+	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+		int iwh = (int) (10 * scaleFactor);
+		int ix = x + ((width - iwh) / 2);
+		int iy = y + ((height - iwh) / 2);
+		int thickness = (int) scaleFactor;
+
+		g.fill( FlatUIUtils.createRectangle( ix, iy, iwh, iwh, thickness ) );
+	}
+}

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

@@ -0,0 +1,55 @@
+/*
+ * 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.icons;
+
+import java.awt.Graphics2D;
+import java.awt.geom.Area;
+import java.awt.geom.Path2D;
+import java.awt.geom.Rectangle2D;
+import com.formdev.flatlaf.ui.FlatUIUtils;
+
+/**
+ * "restore" icon for windows (frames and dialogs).
+ *
+ * @author Karl Tauber
+ */
+public class FlatWindowRestoreIcon
+	extends FlatWindowAbstractIcon
+{
+	public FlatWindowRestoreIcon() {
+	}
+
+	@Override
+	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+		int iwh = (int) (10 * scaleFactor);
+		int ix = x + ((width - iwh) / 2);
+		int iy = y + ((height - iwh) / 2);
+		int thickness = (int) scaleFactor;
+
+		int rwh = (int) (8 * scaleFactor);
+		int ro2 = iwh - rwh;
+
+		Path2D r1 = FlatUIUtils.createRectangle( ix + ro2, iy, rwh, rwh, thickness );
+		Path2D r2 = FlatUIUtils.createRectangle( ix, iy + ro2, rwh, rwh, thickness );
+
+		Area area = new Area( r1 );
+		area.subtract( new Area( new Rectangle2D.Float( ix, iy + ro2, rwh, rwh ) ) );
+		g.fill( area );
+
+		g.fill( r2 );
+	}
+}

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;
 
@@ -45,15 +47,23 @@ public class FlatArrowButton
 	private final Color disabledForeground;
 	private final Color hoverForeground;
 	private final Color hoverBackground;
+	private final Color pressedBackground;
 
 	private int arrowWidth = DEFAULT_ARROW_WIDTH;
 	private int xOffset = 0;
 	private int yOffset = 0;
 
 	private boolean hover;
+	private boolean pressed;
 
 	public FlatArrowButton( int direction, String type, Color foreground, Color disabledForeground,
 		Color hoverForeground, Color hoverBackground )
+	{
+		this( direction, type, foreground, disabledForeground, hoverForeground, hoverBackground, null );
+	}
+
+	public FlatArrowButton( int direction, String type, Color foreground, Color disabledForeground,
+		Color hoverForeground, Color hoverBackground, Color pressedBackground )
 	{
 		super( direction, Color.WHITE, Color.WHITE, Color.WHITE, Color.WHITE );
 
@@ -62,11 +72,12 @@ public class FlatArrowButton
 		this.disabledForeground = disabledForeground;
 		this.hoverForeground = hoverForeground;
 		this.hoverBackground = hoverBackground;
+		this.pressedBackground = pressedBackground;
 
 		setOpaque( false );
 		setBorder( null );
 
-		if( hoverForeground != null || hoverBackground != null ) {
+		if( hoverForeground != null || hoverBackground != null || pressedBackground != null ) {
 			addMouseListener( new MouseAdapter() {
 				@Override
 				public void mouseEntered( MouseEvent e ) {
@@ -79,6 +90,18 @@ public class FlatArrowButton
 					hover = false;
 					repaint();
 				}
+
+				@Override
+				public void mousePressed( MouseEvent e ) {
+					pressed = true;
+					repaint();
+				}
+
+				@Override
+				public void mouseReleased( MouseEvent e ) {
+					pressed = false;
+					repaint();
+				}
 			} );
 		}
 	}
@@ -95,6 +118,10 @@ public class FlatArrowButton
 		return hover;
 	}
 
+	protected boolean isPressed() {
+		return pressed;
+	}
+
 	public int getXOffset() {
 		return xOffset;
 	}
@@ -111,6 +138,10 @@ public class FlatArrowButton
 		this.yOffset = yOffset;
 	}
 
+	protected Color deriveBackground( Color background ) {
+		return background;
+	}
+
 	@Override
 	public Dimension getPreferredSize() {
 		return scale( super.getPreferredSize() );
@@ -130,33 +161,54 @@ public class FlatArrowButton
 		int height = getHeight();
 		boolean enabled = isEnabled();
 
-		// paint hover background
+		// paint hover or pressed background
-		if( enabled && isHover() && hoverBackground != null ) {
+		if( enabled ) {
-			g.setColor( hoverBackground );
+			Color background = (pressedBackground != null && isPressed())
-			g.fillRect( 0, 0, width, height );
+				? deriveBackground( pressedBackground )
+				: ((hoverBackground != null && isHover())
+					? deriveBackground( hoverBackground )
+					: null);
+
+			if( background != null ) {
+				g.setColor( background );
+				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)
+		// move arrow for round borders
-		if( x + rw >= width && x > 0 )
+		Container parent = getParent();
-			x--;
+		if( vert && parent instanceof JComponent && FlatUIUtils.hasRoundBorder( (JComponent) parent ) )
-		if( y + rh >= height && y > 0 )
+			x -= scale( parent.getComponentOrientation().isLeftToRight() ? 1 : -1 );
-			y--;
 
 		// 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 +229,22 @@ 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

@@ -36,23 +36,31 @@ 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}).
  *
  * There is empty space around the component border, if Component.focusWidth is greater than zero,
- * which is used to paint focus border.
+ * which is used to paint outer focus border.
  *
- * Because there is empty space (if focus border is not painted),
+ * Because there is empty space (if outer focus border is not painted),
  * UI delegates that use this border (or subclasses) must invoke
  * {@link FlatUIUtils#paintParentBackground} to paint the empty space correctly.
  *
- * @uiDefault Component.focusWidth			int
+ * @uiDefault Component.focusWidth						int
- * @uiDefault Component.innerFocusWidth		int or float
+ * @uiDefault Component.innerFocusWidth					int or float
- * @uiDefault Component.focusColor			Color
+ * @uiDefault Component.focusColor						Color
- * @uiDefault Component.borderColor			Color
+ * @uiDefault Component.borderColor						Color
- * @uiDefault Component.disabledBorderColor	Color
+ * @uiDefault Component.disabledBorderColor				Color
- * @uiDefault Component.focusedBorderColor	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
  */
@@ -61,37 +69,77 @@ 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();
 		try {
 			FlatUIUtils.setRenderingHints( g2 );
 
-			boolean isCellEditor = isTableCellEditor( c );
+			float focusWidth = scale( (float) getFocusWidth( c ) );
-			float focusWidth = isCellEditor ? 0 : getFocusWidth( c );
+			float borderWidth = scale( (float) getBorderWidth( c ) );
-			float borderWidth = getBorderWidth( c );
+			float arc = scale( (float) getArc( c ) );
-			float arc = isCellEditor ? 0 : getArc( c );
+			Color outlineColor = getOutlineColor( c );
 
-			if( isFocused( c ) ) {
+			// paint outer border
-				float innerFocusWidth = !(c instanceof JScrollPane) ? this.innerFocusWidth : 0;
+			if( outlineColor != null || isFocused( c ) ) {
+				float innerWidth = !isCellEditor( c ) && !(c instanceof JScrollPane)
+					? (outlineColor != null ? innerOutlineWidth : innerFocusWidth)
+					: 0;
 
-				g2.setColor( getFocusColor( c ) );
+				g2.setColor( (outlineColor != null) ? outlineColor : getFocusColor( c ) );
-				FlatUIUtils.paintComponentOuterBorder( g2, x, y, width, height, focusWidth,
+				FlatUIUtils.paintComponentOuterBorder( g2, x, y, width, height,
-					getLineWidth( c ) + scale( innerFocusWidth ), arc );
+					focusWidth, borderWidth + scale( innerWidth ), arc );
 			}
 
-			g2.setPaint( getBorderColor( c ) );
+			// paint border
+			g2.setPaint( (outlineColor != null) ? outlineColor : getBorderColor( c ) );
 			FlatUIUtils.paintComponentBorder( g2, x, y, width, height, focusWidth, borderWidth, arc );
 		} finally {
 			g2.dispose();
 		}
 	}
 
+	/**
+	 * Returns the outline color of the component border specified in client property
+	 * {@link FlatClientProperties#OUTLINE}.
+	 */
+	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 +183,9 @@ 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();
@@ -146,36 +197,65 @@ public class FlatBorder
 			return FlatUIUtils.isPermanentFocusOwner( c );
 	}
 
-	protected boolean isTableCellEditor( Component c ) {
+	protected boolean isCellEditor( Component c ) {
-		return FlatUIUtils.isTableCellEditor( c );
+		return FlatUIUtils.isCellEditor( c );
 	}
 
 	@Override
 	public Insets getBorderInsets( Component c, Insets insets ) {
-		boolean isCellEditor = isTableCellEditor( c );
+		float focusWidth = scale( (float) getFocusWidth( c ) );
-		float ow = (isCellEditor ? 0 : getFocusWidth( c )) + getLineWidth( c );
+		float ow = focusWidth + scale( (float) getLineWidth( c ) );
 
 		insets = super.getBorderInsets( c, insets );
 		insets.top = Math.round( scale( (float) insets.top ) + ow );
 		insets.left = Math.round( scale( (float) insets.left ) + ow );
 		insets.bottom = Math.round( scale( (float) insets.bottom ) + ow );
 		insets.right = Math.round( scale( (float) insets.right ) + ow );
+
+		if( isCellEditor( c ) ) {
+			// remove top and bottom insets if used as cell editor
+			insets.top = insets.bottom = 0;
+
+			// remove right/left insets to avoid that text is truncated (e.g. in file chooser)
+			if( c.getComponentOrientation().isLeftToRight() )
+				insets.right = 0;
+			else
+				insets.left = 0;
+		}
+
 		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 ) {
+		if( isCellEditor( c ) )
+			return 0;
+
+		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;
@@ -43,6 +42,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.default.hoverBorderColor	Color	optional
  * @uiDefault Button.default.focusedBorderColor	Color
  * @uiDefault Button.default.focusColor			Color
+ * @uiDefault Button.borderWidth				int
  * @uiDefault Button.default.borderWidth		int
  * @uiDefault Button.toolbar.margin				Insets
  * @uiDefault Button.toolbar.spacingInsets		Insets
@@ -63,6 +63,7 @@ public class FlatButtonBorder
 	protected final Color defaultHoverBorderColor = UIManager.getColor( "Button.default.hoverBorderColor" );
 	protected final Color defaultFocusedBorderColor = UIManager.getColor( "Button.default.focusedBorderColor" );
 	protected final Color defaultFocusColor = UIManager.getColor( "Button.default.focusColor" );
+	protected final int borderWidth = UIManager.getInt( "Button.borderWidth" );
 	protected final int defaultBorderWidth = UIManager.getInt( "Button.default.borderWidth" );
 	protected final Insets toolbarMargin = UIManager.getInsets( "Button.toolbar.margin" );
 	protected final Insets toolbarSpacingInsets = UIManager.getInsets( "Button.toolbar.spacingInsets" );
@@ -82,6 +83,11 @@ public class FlatButtonBorder
 		return FlatButtonUI.isDefaultButton( c ) ? defaultFocusColor : super.getFocusColor( c );
 	}
 
+	@Override
+	protected boolean isFocused( Component c ) {
+		return FlatButtonUI.isFocusPainted( c ) && super.isFocused( c );
+	}
+
 	@Override
 	protected Paint getBorderColor( Component c ) {
 		boolean def = FlatButtonUI.isDefaultButton( c );
@@ -115,8 +121,8 @@ public class FlatButtonBorder
 		} else {
 			insets = super.getBorderInsets( c, insets );
 
-			// use smaller left and right insets for icon-only buttons (so that they are square)
+			// use smaller left and right insets for icon-only or single-character buttons (so that they are square)
-			if( FlatButtonUI.isIconOnlyButton( c ) && ((AbstractButton)c).getMargin() instanceof UIResource )
+			if( FlatButtonUI.isIconOnlyOrSingleCharacterButton( c ) && ((AbstractButton)c).getMargin() instanceof UIResource )
 				insets.left = insets.right = Math.min( insets.top, insets.bottom );
 		}
 
@@ -124,17 +130,24 @@ public class FlatButtonBorder
 	}
 
 	@Override
-	protected float getFocusWidth( Component c ) {
+	protected int getFocusWidth( Component c ) {
-		return FlatToggleButtonUI.isTabButton( c ) ? 0 : super.getFocusWidth(c );
+		return FlatToggleButtonUI.isTabButton( c ) ? 0 : super.getFocusWidth( c );
 	}
 
 	@Override
-	protected float getBorderWidth( Component c ) {
+	protected int getBorderWidth( Component c ) {
-		return FlatButtonUI.isDefaultButton( c ) ? scale( (float) defaultBorderWidth ) : super.getBorderWidth( c );
+		return FlatButtonUI.isDefaultButton( c ) ? defaultBorderWidth : borderWidth;
 	}
 
 	@Override
-	protected float getArc( Component c ) {
+	protected int getArc( Component c ) {
-		return FlatButtonUI.isSquareButton( c ) ? 0 : scale( (float) arc );
+		if( isCellEditor( c ) )
+			return 0;
+
+		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
@@ -70,7 +67,11 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.focusedBackground			Color	optional
  * @uiDefault Button.hoverBackground			Color	optional
  * @uiDefault Button.pressedBackground			Color	optional
+ * @uiDefault Button.selectedBackground			Color
+ * @uiDefault Button.selectedForeground			Color
+ * @uiDefault Button.disabledBackground			Color	optional
  * @uiDefault Button.disabledText				Color
+ * @uiDefault Button.disabledSelectedBackground	Color
  * @uiDefault Button.default.background			Color
  * @uiDefault Button.default.startBackground	Color	optional; if set, a gradient paint is used and Button.default.background is ignored
  * @uiDefault Button.default.endBackground		Color	optional; if set, a gradient paint is used
@@ -86,23 +87,29 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.toolbar.spacingInsets		Insets
  * @uiDefault Button.toolbar.hoverBackground	Color
  * @uiDefault Button.toolbar.pressedBackground	Color
+ * @uiDefault Button.toolbar.selectedBackground	Color
  *
  * @author Karl Tauber
  */
 public class FlatButtonUI
 	extends BasicButtonUI
 {
-	protected int focusWidth;
-	protected int arc;
 	protected int minimumWidth;
 	protected int iconTextGap;
 
+	protected Color background;
+	protected Color foreground;
+
 	protected Color startBackground;
 	protected Color endBackground;
 	protected Color focusedBackground;
 	protected Color hoverBackground;
 	protected Color pressedBackground;
+	protected Color selectedBackground;
+	protected Color selectedForeground;
+	protected Color disabledBackground;
 	protected Color disabledText;
+	protected Color disabledSelectedBackground;
 
 	protected Color defaultBackground;
 	protected Color defaultEndBackground;
@@ -119,6 +126,7 @@ public class FlatButtonUI
 	protected Insets toolbarSpacingInsets;
 	protected Color toolbarHoverBackground;
 	protected Color toolbarPressedBackground;
+	protected Color toolbarSelectedBackground;
 
 	private Icon helpButtonIcon;
 
@@ -139,17 +147,22 @@ 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 );
 
+			background = UIManager.getColor( prefix + "background" );
+			foreground = UIManager.getColor( prefix + "foreground" );
+
 			startBackground = UIManager.getColor( prefix + "startBackground" );
 			endBackground = UIManager.getColor( prefix + "endBackground" );
 			focusedBackground = UIManager.getColor( prefix + "focusedBackground" );
 			hoverBackground = UIManager.getColor( prefix + "hoverBackground" );
 			pressedBackground = UIManager.getColor( prefix + "pressedBackground" );
+			selectedBackground = UIManager.getColor( prefix + "selectedBackground" );
+			selectedForeground = UIManager.getColor( prefix + "selectedForeground" );
+			disabledBackground = UIManager.getColor( prefix + "disabledBackground" );
 			disabledText = UIManager.getColor( prefix + "disabledText" );
+			disabledSelectedBackground = UIManager.getColor( prefix + "disabledSelectedBackground" );
 
 			if( UIManager.getBoolean( "Button.paintShadow" ) ) {
 				shadowWidth = FlatUIUtils.getUIInt( "Button.shadowWidth", 2 );
@@ -172,6 +185,7 @@ public class FlatButtonUI
 			toolbarSpacingInsets = UIManager.getInsets( "Button.toolbar.spacingInsets" );
 			toolbarHoverBackground = UIManager.getColor( prefix + "toolbar.hoverBackground" );
 			toolbarPressedBackground = UIManager.getColor( prefix + "toolbar.pressedBackground" );
+			toolbarSelectedBackground = UIManager.getColor( prefix + "toolbar.selectedBackground" );
 
 			helpButtonIcon = UIManager.getIcon( "HelpButton.icon" );
 
@@ -187,7 +201,7 @@ public class FlatButtonUI
 		LookAndFeel.installProperty( b, "opaque", false );
 		LookAndFeel.installProperty( b, "iconTextGap", scale( iconTextGap ) );
 
-		MigLayoutVisualPadding.install( b, getFocusWidth( b ) );
+		MigLayoutVisualPadding.install( b );
 	}
 
 	@Override
@@ -200,21 +214,21 @@ public class FlatButtonUI
 
 	@Override
 	protected BasicButtonListener createButtonListener( AbstractButton b ) {
-		return new BasicButtonListener( b ) {
+		return new FlatButtonListener( b );
-			@Override
-			public void propertyChange( PropertyChangeEvent e ) {
-				super.propertyChange( e );
-				FlatButtonUI.this.propertyChange( b, e );
-			}
-		};
 	}
 
 	protected void propertyChange( AbstractButton b, PropertyChangeEvent e ) {
 		switch( e.getPropertyName() ) {
+			case SQUARE_SIZE:
 			case MINIMUM_WIDTH:
 			case MINIMUM_HEIGHT:
 				b.revalidate();
 				break;
+
+			case BUTTON_TYPE:
+				b.revalidate();
+				b.repaint();
+				break;
 		}
 	}
 
@@ -222,11 +236,19 @@ public class FlatButtonUI
 		return !(c instanceof AbstractButton) || ((AbstractButton)c).isContentAreaFilled();
 	}
 
+	public static boolean isFocusPainted( Component c ) {
+		return !(c instanceof AbstractButton) || ((AbstractButton)c).isFocusPainted();
+	}
+
 	static boolean isDefaultButton( Component c ) {
 		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 +258,15 @@ public class FlatButtonUI
 			(icon == null && text != null && ("...".equals( text ) || text.length() == 1));
 	}
 
-	static boolean isSquareButton( Component c ) {
+	// same indices as in parameters to clientPropertyChoice()
-		return c instanceof AbstractButton && clientPropertyEquals( (AbstractButton) c, BUTTON_TYPE, BUTTON_TYPE_SQUARE );
+	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 +274,8 @@ 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
@@ -267,56 +297,61 @@ public class FlatButtonUI
 
 	protected void paintBackground( Graphics g, JComponent c ) {
 		Color background = getBackground( c );
-		if( background != null ) {
+		if( background == null )
-			Graphics2D g2 = (Graphics2D) g.create();
+			return;
-			try {
-				FlatUIUtils.setRenderingHints( g2 );
 
-				Border border = c.getBorder();
+		Graphics2D g2 = (Graphics2D) g.create();
-				boolean isToolBarButton = isToolBarButton( c );
+		try {
-				float focusWidth = (border instanceof FlatBorder && !isToolBarButton) ? scale( (float) getFocusWidth( c ) ) : 0;
+			FlatUIUtils.setRenderingHints( g2 );
-				float arc = ((border instanceof FlatButtonBorder && !isSquareButton( c )) || isToolBarButton)
-					? scale( (float) this.arc ) : 0;
-				boolean def = isDefaultButton( c );
 
-				int x = 0;
+			boolean isToolBarButton = isToolBarButton( c );
-				int y = 0;
+			float focusWidth = isToolBarButton ? 0 : FlatUIUtils.getBorderFocusWidth( c );
-				int width = c.getWidth();
+			float arc = FlatUIUtils.getBorderArc( c );
-				int height = c.getHeight();
 
-				if( isToolBarButton ) {
+			boolean def = isDefaultButton( c );
-					Insets spacing = UIScale.scale( toolbarSpacingInsets );
-					x += spacing.left;
-					y += spacing.top;
-					width -= spacing.left + spacing.right;
-					height -= spacing.top + spacing.bottom;
-				}
 
-				// paint shadow
+			int x = 0;
-				Color shadowColor = def ? defaultShadowColor : this.shadowColor;
+			int y = 0;
-				if( !isToolBarButton && shadowColor != null && shadowWidth > 0 && focusWidth > 0 &&
+			int width = c.getWidth();
-					!FlatUIUtils.isPermanentFocusOwner( c ) && c.isEnabled() )
+			int height = c.getHeight();
-				{
-					g2.setColor( shadowColor );
-					g2.fill( new RoundRectangle2D.Float( focusWidth, focusWidth + UIScale.scale( (float) shadowWidth ),
-						width - focusWidth * 2, height - focusWidth * 2, arc, arc ) );
-				}
 
-				// paint background
+			if( isToolBarButton ) {
-				Color startBg = def ? defaultBackground : startBackground;
+				Insets spacing = UIScale.scale( toolbarSpacingInsets );
-				Color endBg = def ? defaultEndBackground : endBackground;
+				x += spacing.left;
-				if( background == startBg && endBg != null && !startBg.equals( endBg ) )
+				y += spacing.top;
-					g2.setPaint( new GradientPaint( 0, 0, startBg, 0, height, endBg ) );
+				width -= spacing.left + spacing.right;
-				else
+				height -= spacing.top + spacing.bottom;
-					FlatUIUtils.setColor( g2, background, def ? defaultBackground : c.getBackground() );
-
-				FlatUIUtils.paintComponentBackground( g2, x, y, width, height, focusWidth, arc );
-			} finally {
-				g2.dispose();
 			}
+
+			// paint shadow
+			Color shadowColor = def ? defaultShadowColor : this.shadowColor;
+			if( !isToolBarButton && shadowColor != null && shadowWidth > 0 && focusWidth > 0 &&
+				!(isFocusPainted( c ) && FlatUIUtils.isPermanentFocusOwner( c )) && c.isEnabled() )
+			{
+				g2.setColor( shadowColor );
+				g2.fill( new RoundRectangle2D.Float( focusWidth, focusWidth + UIScale.scale( (float) shadowWidth ),
+					width - focusWidth * 2, height - focusWidth * 2, arc, arc ) );
+			}
+
+			// paint background
+			Color startBg = def ? defaultBackground : startBackground;
+			Color endBg = def ? defaultEndBackground : endBackground;
+			if( background == startBg && endBg != null && !startBg.equals( endBg ) )
+				g2.setPaint( new GradientPaint( 0, 0, startBg, 0, height, endBg ) );
+			else
+				g2.setColor( FlatUIUtils.deriveColor( background, getBackgroundBase( c, def ) ) );
+
+			FlatUIUtils.paintComponentBackground( g2, x, y, width, height, focusWidth, arc );
+		} finally {
+			g2.dispose();
 		}
 	}
 
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		super.paint( FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c ), c );
+	}
+
 	@Override
 	protected void paintText( Graphics g, AbstractButton b, Rectangle textRect, String text ) {
 		if( isHelpButton( b ) )
@@ -333,7 +368,7 @@ public class FlatButtonUI
 			}
 		}
 
-		paintText( g, b, textRect, text, b.isEnabled() ? getForeground( b ) : disabledText );
+		paintText( g, b, textRect, text, getForeground( b ) );
 	}
 
 	public static void paintText( Graphics g, AbstractButton b, Rectangle textRect, String text, Color foreground ) {
@@ -346,8 +381,19 @@ public class FlatButtonUI
 	}
 
 	protected Color getBackground( JComponent c ) {
+		if( ((AbstractButton)c).isSelected() ) {
+			// in toolbar use same colors for disabled and enabled because
+			// we assume that toolbar icon is shown disabled
+			boolean toolBarButton = isToolBarButton( c );
+			return buttonStateColor( c,
+				toolBarButton ? toolbarSelectedBackground : selectedBackground,
+				toolBarButton ? toolbarSelectedBackground : disabledSelectedBackground,
+				null, null,
+				toolBarButton ? toolbarPressedBackground : pressedBackground );
+		}
+
 		if( !c.isEnabled() )
-			return null;
+			return disabledBackground;
 
 		// toolbar button
 		if( isToolBarButton( c ) ) {
@@ -363,13 +409,26 @@ public class FlatButtonUI
 
 		boolean def = isDefaultButton( c );
 		return buttonStateColor( c,
-			def ? defaultBackground : c.getBackground(),
+			getBackgroundBase( c, def ),
 			null,
-			def ? defaultFocusedBackground : focusedBackground,
+			isCustomBackground( c.getBackground() ) ? null : (def ? defaultFocusedBackground : focusedBackground),
 			def ? defaultHoverBackground : hoverBackground,
 			def ? defaultPressedBackground : pressedBackground );
 	}
 
+	protected Color getBackgroundBase( JComponent c, boolean def ) {
+		// use component background if explicitly set
+		Color bg = c.getBackground();
+		if( isCustomBackground( bg ) )
+			return bg;
+
+		return def ? defaultBackground : bg;
+	}
+
+	protected boolean isCustomBackground( Color bg ) {
+		return bg != background && (startBackground == null || bg != startBackground);
+	}
+
 	public static Color buttonStateColor( Component c, Color enabledColor, Color disabledColor,
 		Color focusedColor, Color hoverColor, Color pressedColor )
 	{
@@ -384,15 +443,30 @@ public class FlatButtonUI
 		if( hoverColor != null && b != null && b.getModel().isRollover() )
 			return hoverColor;
 
-		if( focusedColor != null && FlatUIUtils.isPermanentFocusOwner( c ) )
+		if( focusedColor != null && isFocusPainted( c ) && FlatUIUtils.isPermanentFocusOwner( c ) )
 			return focusedColor;
 
 		return enabledColor;
 	}
 
 	protected Color getForeground( JComponent c ) {
+		if( !c.isEnabled() )
+			return disabledText;
+
+		if( ((AbstractButton)c).isSelected() && !isToolBarButton( c ) )
+			return selectedForeground;
+
+		// use component foreground if explicitly set
+		Color fg = c.getForeground();
+		if( isCustomForeground( fg ) )
+			return fg;
+
 		boolean def = isDefaultButton( c );
-		return def ? defaultForeground : c.getForeground();
+		return def ? defaultForeground : fg;
+	}
+
+	protected boolean isCustomForeground( Color fg ) {
+		return fg != foreground;
 	}
 
 	@Override
@@ -401,23 +475,43 @@ 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
+		// make square or apply minimum width/height
-		// or apply minimum width, if not in toolbar and not a icon-only button
+		boolean isIconOnlyOrSingleCharacter = isIconOnlyOrSingleCharacterButton( c );
-		if( isIconOnlyButton( c ) )
+		if( clientPropertyBoolean( c, SQUARE_SIZE, false ) ) {
+			// make button square (increase width or height so that they are equal)
+			prefSize.width = prefSize.height = Math.max( prefSize.width, prefSize.height );
+		} else if( isIconOnlyOrSingleCharacter && ((AbstractButton)c).getIcon() == null ) {
+			// make single-character-no-icon button square (increase width)
 			prefSize.width = Math.max( prefSize.width, prefSize.height );
-		else if( !isToolBarButton( c ) && c.getBorder() instanceof FlatButtonBorder ) {
+		} else if( !isIconOnlyOrSingleCharacter && !isToolBarButton( c ) && c.getBorder() instanceof FlatButtonBorder ) {
-			int focusWidth = getFocusWidth( c );
+			// apply minimum width/height
-			prefSize.width = Math.max( prefSize.width, scale( FlatUIUtils.minimumWidth( c, minimumWidth ) + (focusWidth * 2) ) );
+			float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
-			prefSize.height = Math.max( prefSize.height, scale( FlatUIUtils.minimumHeight( c, 0 ) + (focusWidth * 2) ) );
+			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 ) {
+	//---- class FlatButtonListener -------------------------------------------
-		return focusWidth;
+
+	protected class FlatButtonListener
+		extends BasicButtonListener
+	{
+		private final AbstractButton b;
+
+		protected FlatButtonListener( AbstractButton b ) {
+			super( b );
+			this.b = b;
+		}
+
+		@Override
+		public void propertyChange( PropertyChangeEvent e ) {
+			super.propertyChange( e );
+			FlatButtonUI.this.propertyChange( b, e );
+		}
 	}
 }

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

@@ -31,7 +31,7 @@ import javax.swing.text.JTextComponent;
  *
  * @author Karl Tauber
  */
-class FlatCaret
+public class FlatCaret
 	extends DefaultCaret
 	implements UIResource
 {
@@ -41,7 +41,7 @@ class FlatCaret
 	private boolean wasTemporaryLost;
 	private boolean isMousePressed;
 
-	FlatCaret( String selectAllOnFocusPolicy ) {
+	public FlatCaret( String selectAllOnFocusPolicy ) {
 		this.selectAllOnFocusPolicy = selectAllOnFocusPolicy;
 	}
 
@@ -87,7 +87,7 @@ class FlatCaret
 		super.mouseReleased( e );
 	}
 
-	private void selectAllOnFocusGained() {
+	protected void selectAllOnFocusGained() {
 		JTextComponent c = getComponent();
 		Document doc = c.getDocument();
 		if( doc == null || !c.isEnabled() || !c.isEditable() )

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 +47,8 @@ import javax.swing.JComboBox;
 import javax.swing.JComponent;
 import javax.swing.JList;
 import javax.swing.JPanel;
+import javax.swing.JScrollBar;
+import javax.swing.JTextField;
 import javax.swing.KeyStroke;
 import javax.swing.ListCellRenderer;
 import javax.swing.LookAndFeel;
@@ -76,8 +79,10 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * <!-- FlatComboBoxUI -->
  *
- * @uiDefault Component.focusWidth				int
+ * @uiDefault ComboBox.minimumWidth				int
- * @uiDefault Component.arc						int
+ * @uiDefault ComboBox.editorColumns			int
+ * @uiDefault ComboBox.maximumRowCount			int
+ * @uiDefault ComboBox.buttonStyle				String	auto (default), button or none
  * @uiDefault Component.arrowType				String	triangle (default) or chevron
  * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault Component.borderColor				Color
@@ -96,8 +101,9 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatComboBoxUI
 	extends BasicComboBoxUI
 {
-	protected int focusWidth;
+	protected int minimumWidth;
-	protected int arc;
+	protected int editorColumns;
+	protected String buttonStyle;
 	protected String arrowType;
 	protected boolean isIntelliJTheme;
 	protected Color borderColor;
@@ -114,7 +120,7 @@ public class FlatComboBoxUI
 	protected Color buttonHoverArrowColor;
 
 	private MouseListener hoverListener;
-	private boolean hover;
+	protected boolean hover;
 
 	private WeakReference<Component> lastRendererComponent;
 
@@ -150,8 +156,9 @@ public class FlatComboBoxUI
 
 		LookAndFeel.installProperty( comboBox, "opaque", false );
 
-		focusWidth = UIManager.getInt( "Component.focusWidth" );
+		minimumWidth = UIManager.getInt( "ComboBox.minimumWidth" );
-		arc = UIManager.getInt( "Component.arc" );
+		editorColumns = UIManager.getInt( "ComboBox.editorColumns" );
+		buttonStyle = UIManager.getString( "ComboBox.buttonStyle" );
 		arrowType = UIManager.getString( "Component.arrowType" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		borderColor = UIManager.getColor( "Component.borderColor" );
@@ -167,10 +174,15 @@ public class FlatComboBoxUI
 		buttonDisabledArrowColor = UIManager.getColor( "ComboBox.buttonDisabledArrowColor" );
 		buttonHoverArrowColor = UIManager.getColor( "ComboBox.buttonHoverArrowColor" );
 
+		// set maximumRowCount
+		int maximumRowCount = UIManager.getInt( "ComboBox.maximumRowCount" );
+		if( maximumRowCount > 0 && maximumRowCount != 8 && comboBox.getMaximumRowCount() == 8 )
+			comboBox.setMaximumRowCount( maximumRowCount );
+
 		// scale
 		padding = UIScale.scale( padding );
 
-		MigLayoutVisualPadding.install( comboBox, focusWidth );
+		MigLayoutVisualPadding.install( comboBox );
 	}
 
 	@Override
@@ -249,6 +261,10 @@ 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 +274,30 @@ 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 );
@@ -279,7 +307,7 @@ public class FlatComboBoxUI
 		updateEditorColors();
 
 		// macOS
-		if( SystemInfo.IS_MAC && editor instanceof JTextComponent ) {
+		if( SystemInfo.isMacOS && editor instanceof JTextComponent ) {
 			// delegate actions from editor text field to combobox, which is necessary
 			// because text field on macOS already handle those keys
 			InputMap inputMap = ((JTextComponent)editor).getInputMap();
@@ -296,30 +324,25 @@ public class FlatComboBoxUI
 		// use non-UIResource colors because when SwingUtilities.updateComponentTreeUI()
 		// is used, then the editor is updated after the combobox and the
 		// colors are again replaced with default colors
-		boolean enabled = editor.isEnabled();
+		boolean isTextComponent = editor instanceof JTextComponent;
-		editor.setForeground( FlatUIUtils.nonUIResource( (enabled || editor instanceof JTextComponent)
+		editor.setForeground( FlatUIUtils.nonUIResource( getForeground( isTextComponent || editor.isEnabled() ) ) );
-			? comboBox.getForeground()
+
-			: disabledForeground ) );
+		if( isTextComponent )
-		if( editor instanceof JTextComponent )
+			((JTextComponent)editor).setDisabledTextColor( FlatUIUtils.nonUIResource( getForeground( false ) ) );
-			((JTextComponent)editor).setDisabledTextColor( FlatUIUtils.nonUIResource( disabledForeground ) );
 	}
 
 	@Override
 	protected JButton createArrowButton() {
-		return new FlatArrowButton( SwingConstants.SOUTH, arrowType, buttonArrowColor,
+		return new FlatComboBoxButton();
-			buttonDisabledArrowColor, buttonHoverArrowColor, null )
-		{
-			@Override
-			protected boolean isHover() {
-				return super.isHover() || (!comboBox.isEditable() ? hover : false);
-			}
-		};
 	}
 
 	@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;
@@ -327,22 +350,19 @@ 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 paintButton = (comboBox.isEditable() || "button".equals( buttonStyle )) && !"none".equals( buttonStyle );
 		boolean enabled = comboBox.isEnabled();
 		boolean isLeftToRight = comboBox.getComponentOrientation().isLeftToRight();
 
 		// paint background
-		g2.setColor( enabled
+		g2.setColor( getBackground( enabled ) );
-			? (editableBackground != null && comboBox.isEditable() ? editableBackground : c.getBackground())
-			: getDisabledBackground( comboBox ) );
 		FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
 
 		// paint arrow button background
 		if( enabled ) {
-			g2.setColor( comboBox.isEditable() ? buttonEditableBackground : buttonBackground );
+			g2.setColor( paintButton ? buttonEditableBackground : buttonBackground );
 			Shape oldClip = g2.getClip();
 			if( isLeftToRight )
 				g2.clipRect( arrowX, 0, width - arrowX, height );
@@ -353,7 +373,7 @@ public class FlatComboBoxUI
 		}
 
 		// paint vertical line between value and arrow button
-		if( comboBox.isEditable() ) {
+		if( paintButton ) {
 			g2.setColor( enabled ? borderColor : disabledBorderColor );
 			float lw = scale( 1f );
 			float lx = isLeftToRight ? arrowX : arrowX + arrowWidth - lw;
@@ -376,8 +396,8 @@ public class FlatComboBoxUI
 		uninstallCellPaddingBorder( c );
 
 		boolean enabled = comboBox.isEnabled();
-		c.setForeground( enabled ? comboBox.getForeground() : disabledForeground );
+		c.setBackground( getBackground( enabled ) );
-		c.setBackground( enabled ? comboBox.getBackground() : getDisabledBackground( comboBox ) );
+		c.setForeground( getForeground( enabled ) );
 
 		boolean shouldValidate = (c instanceof JPanel);
 		if( padding != null )
@@ -394,12 +414,24 @@ public class FlatComboBoxUI
 
 	@Override
 	public void paintCurrentValueBackground( Graphics g, Rectangle bounds, boolean hasFocus ) {
-		g.setColor( comboBox.isEnabled() ? comboBox.getBackground() : getDisabledBackground( comboBox ) );
+		// not necessary because already painted in update()
-		g.fillRect( bounds.x, bounds.y, bounds.width, bounds.height );
 	}
 
-	private Color getDisabledBackground( JComponent c ) {
+	protected Color getBackground( boolean enabled ) {
-		return isIntelliJTheme ? FlatUIUtils.getParentBackground( c ) : disabledBackground;
+		return enabled
+			? (editableBackground != null && comboBox.isEditable() ? editableBackground : comboBox.getBackground())
+			: (isIntelliJTheme ? FlatUIUtils.getParentBackground( comboBox ) : disabledBackground);
+	}
+
+	protected Color getForeground( boolean enabled ) {
+		return enabled ? comboBox.getForeground() : disabledForeground;
+	}
+
+	@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
@@ -422,6 +454,18 @@ 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;
 	}
@@ -457,6 +501,27 @@ public class FlatComboBoxUI
 		}
 	}
 
+	//---- class FlatComboBoxButton -------------------------------------------
+
+	protected class FlatComboBoxButton
+		extends FlatArrowButton
+	{
+		protected FlatComboBoxButton() {
+			this( SwingConstants.SOUTH, arrowType, buttonArrowColor, buttonDisabledArrowColor, buttonHoverArrowColor, null, null );
+		}
+
+		protected FlatComboBoxButton( int direction, String type, Color foreground, Color disabledForeground,
+			Color hoverForeground, Color hoverBackground, Color pressedBackground )
+		{
+			super( direction, type, foreground, disabledForeground, hoverForeground, hoverBackground, pressedBackground );
+		}
+
+		@Override
+		protected boolean isHover() {
+			return super.isHover() || (!comboBox.isEditable() ? hover : false);
+		}
+	}
+
 	//---- class FlatComboPopup -----------------------------------------------
 
 	@SuppressWarnings( { "rawtypes", "unchecked" } )
@@ -480,13 +545,26 @@ public class FlatComboBoxUI
 
 		@Override
 		protected Rectangle computePopupBounds( int px, int py, int pw, int ph ) {
-			// get maximum display size of all items
+			// get maximum display width of all items
-			Dimension displaySize = getDisplaySize();
+			int displayWidth = getDisplaySize().width;
+
+			// add border insets
+			for( Border border : new Border[] { scroller.getViewportBorder(), scroller.getBorder() } ) {
+				if( border != null ) {
+					Insets borderInsets = border.getBorderInsets( null );
+					displayWidth += borderInsets.left + borderInsets.right;
+				}
+			}
+
+			// add width of vertical scroll bar
+			JScrollBar verticalScrollBar = scroller.getVerticalScrollBar();
+			if( verticalScrollBar != null )
+				displayWidth += verticalScrollBar.getPreferredSize().width;
 
 			// make popup wider if necessary
-			if( displaySize.width > pw ) {
+			if( displayWidth > pw ) {
-				int diff = displaySize.width - pw;
+				int diff = displayWidth - pw;
-				pw = displaySize.width;
+				pw = displayWidth;
 
 				if( !comboBox.getComponentOrientation().isLeftToRight() )
 					px -= diff;

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 +19,8 @@ package com.formdev.flatlaf.ui;
 import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.beans.PropertyChangeEvent;
 import javax.swing.JComponent;
 import javax.swing.JEditorPane;
 import javax.swing.UIManager;
@@ -26,6 +28,8 @@ 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;
+import com.formdev.flatlaf.util.HiDPIUtils;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JEditorPane}.
@@ -83,26 +87,45 @@ 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;
 	}
 
+	@Override
+	protected void paintSafely( Graphics g ) {
+		super.paintSafely( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ) );
+	}
+
 	@Override
 	protected void paintBackground( Graphics g ) {
 		JTextComponent c = getComponent();

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

@@ -57,4 +57,8 @@ public class FlatEmptyBorder
 		insets.bottom = scale( bottom );
 		return insets;
 	}
+
+	public Insets getUnscaledBorderInsets() {
+		return super.getBorderInsets();
+	}
 }

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

@@ -16,11 +16,28 @@
 
 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.JComboBox;
 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 +103,7 @@ 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 +115,27 @@ 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 +144,52 @@ 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 );
+				}
+			}
+		}
+
+		// increase maximum row count of directory combo box popup list
+		try {
+			Component directoryComboBox =  ((JPanel)topPanel).getComponent( 2 );
+			if( directoryComboBox instanceof JComboBox ) {
+				int maximumRowCount = UIManager.getInt( "ComboBox.maximumRowCount" );
+				if( maximumRowCount > 0 )
+					((JComboBox<?>)directoryComboBox).setMaximumRowCount( maximumRowCount );
+			}
+		} catch( ArrayIndexOutOfBoundsException ex ) {
+			// ignore
+		}
+	}
+
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
 		return UIScale.scale( super.getPreferredSize( c ) );
@@ -119,4 +199,50 @@ 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/FlatInternalFrameTitlePane.java

@@ -26,13 +26,14 @@ import java.beans.PropertyChangeListener;
 import javax.swing.BorderFactory;
 import javax.swing.BoxLayout;
 import javax.swing.Icon;
+import javax.swing.ImageIcon;
 import javax.swing.JInternalFrame;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 import javax.swing.LookAndFeel;
-import javax.swing.UIManager;
 import javax.swing.border.Border;
 import javax.swing.plaf.basic.BasicInternalFrameTitlePane;
+import com.formdev.flatlaf.util.ScaledImageIcon;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -91,7 +92,21 @@ public class FlatInternalFrameTitlePane
 		updateFrameIcon();
 		updateColors();
 
-		buttonPanel = new JPanel();
+		buttonPanel = new JPanel() {
+			@Override
+			public Dimension getPreferredSize() {
+				Dimension size = super.getPreferredSize();
+				int height = size.height;
+				// use height of invisible buttons to always have same title pane height
+				if( !iconButton.isVisible() )
+					height = Math.max( height, iconButton.getPreferredSize().height );
+				if( !maxButton.isVisible() )
+					height = Math.max( height, maxButton.getPreferredSize().height );
+				if( !closeButton.isVisible() )
+					height = Math.max( height, closeButton.getPreferredSize().height );
+				return new Dimension( size.width, height );
+			}
+		};
 		buttonPanel.setLayout( new BoxLayout( buttonPanel, BoxLayout.LINE_AXIS ) );
 		buttonPanel.setOpaque( false );
 
@@ -103,14 +118,16 @@ public class FlatInternalFrameTitlePane
 		add( buttonPanel, BorderLayout.LINE_END );
 	}
 
-	private void updateFrameIcon() {
+	protected void updateFrameIcon() {
 		Icon frameIcon = frame.getFrameIcon();
-		if( frameIcon == UIManager.getIcon( "InternalFrame.icon" ) )
+		if( frameIcon != null && (frameIcon.getIconWidth() == 0 || frameIcon.getIconHeight() == 0) )
 			frameIcon = null;
+		else if( frameIcon instanceof ImageIcon )
+			frameIcon = new ScaledImageIcon( (ImageIcon) frameIcon );
 		titleLabel.setIcon( frameIcon );
 	}
 
-	private void updateColors() {
+	protected void updateColors() {
 		Color background = FlatUIUtils.nonUIResource( frame.isSelected() ? selectedTitleColor : notSelectedTitleColor );
 		Color foreground = FlatUIUtils.nonUIResource( frame.isSelected() ? selectedTextColor : notSelectedTextColor );
 
@@ -123,7 +140,7 @@ public class FlatInternalFrameTitlePane
 		closeButton.setForeground( foreground );
 	}
 
-	private void updateButtonsVisibility() {
+	protected void updateButtonsVisibility() {
 		iconButton.setVisible( frame.isIconifiable() );
 		maxButton.setVisible( frame.isMaximizable() );
 		closeButton.setVisible( frame.isClosable() );
@@ -150,7 +167,7 @@ public class FlatInternalFrameTitlePane
 
 	//---- class FlatPropertyChangeHandler ------------------------------------
 
-	private class FlatPropertyChangeHandler
+	protected class FlatPropertyChangeHandler
 		extends PropertyChangeHandler
 	{
 		@Override

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

@@ -84,6 +84,8 @@ import javax.swing.plaf.basic.BasicInternalFrameUI;
 public class FlatInternalFrameUI
 	extends BasicInternalFrameUI
 {
+	protected FlatWindowResizer windowResizer;
+
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatInternalFrameUI( (JInternalFrame) c );
 	}
@@ -97,6 +99,18 @@ public class FlatInternalFrameUI
 		super.installUI( c );
 
 		LookAndFeel.installProperty( frame, "opaque", false );
+
+		windowResizer = createWindowResizer();
+	}
+
+	@Override
+	public void uninstallUI( JComponent c ) {
+		super.uninstallUI( c );
+
+		if( windowResizer != null ) {
+			windowResizer.uninstall();
+			windowResizer = null;
+		}
 	}
 
 	@Override
@@ -104,6 +118,10 @@ public class FlatInternalFrameUI
 		return new FlatInternalFrameTitlePane( w );
 	}
 
+	protected FlatWindowResizer createWindowResizer() {
+		return new FlatWindowResizer.InternalFrameResizer( frame, this::getDesktopManager );
+	}
+
 	//---- class FlatInternalFrameBorder --------------------------------------
 
 	public static class FlatInternalFrameBorder
@@ -112,6 +130,16 @@ 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 +165,31 @@ 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,
+				// paint drop shadow
-					y + insets.top - lineWidth,
+				if( dropShadowPainted ) {
-					width - insets.left - insets.right + (lineWidth * 2),
+					FlatDropShadowBorder dropShadowBorder = f.isSelected()
-					height - insets.top - insets.bottom + (lineWidth * 2),
+						? activeDropShadowBorder : inactiveDropShadowBorder;
-					lineWidth ) );
+
+					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/FlatLabelUI.java

@@ -19,6 +19,7 @@ package com.formdev.flatlaf.ui;
 import java.awt.Color;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.Rectangle;
 import java.beans.PropertyChangeEvent;
 import javax.swing.Icon;
@@ -30,6 +31,7 @@ import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.plaf.basic.BasicLabelUI;
 import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -124,6 +126,17 @@ public class FlatLabelUI
 		BasicHTML.updateRenderer( c, text );
 	}
 
+	static Graphics createGraphicsHTMLTextYCorrection( Graphics g, JComponent c ) {
+		return (c.getClientProperty( BasicHTML.propertyKey ) != null)
+			? HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g )
+			: g;
+	}
+
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		super.paint( createGraphicsHTMLTextYCorrection( g, c ), c );
+	}
+
 	@Override
 	protected void paintEnabledText( JLabel l, Graphics g, String s, int textX, int textY ) {
 		int mnemIndex = FlatLaf.isShowMnemonics() ? l.getDisplayedMnemonicIndex() : -1;

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

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
+import java.awt.EventQueue;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import javax.swing.JComponent;
@@ -106,7 +107,11 @@ public class FlatListUI
 			@Override
 			public void focusLost( FocusEvent e ) {
 				super.focusLost( e );
-				toggleSelectionColors();
+
+				// use invokeLater for the case that the window is deactivated
+				EventQueue.invokeLater( () -> {
+					toggleSelectionColors();
+				} );
 			}
 		};
 	}
@@ -121,6 +126,9 @@ public class FlatListUI
 	 * or the application has to be changed to extend a FlatLaf renderer.
 	 */
 	private void toggleSelectionColors() {
+		if( list == null )
+			return;
+
 		if( FlatUIUtils.isPermanentFocusOwner( list ) ) {
 			if( list.getSelectionBackground() == selectionInactiveBackground )
 				list.setSelectionBackground( selectionBackground );

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

@@ -82,7 +82,7 @@ public class FlatMenuBarUI
 			JMenuBar menuBar = (JMenuBar) e.getSource();
 			JMenu menu = menuBar.getMenu( 0 );
 			if( menu != null ) {
-				MenuSelectionManager.defaultManager().setSelectedPath( SystemInfo.IS_WINDOWS
+				MenuSelectionManager.defaultManager().setSelectedPath( SystemInfo.isWindows
 					? new MenuElement[] { menuBar, menu }
 					: new MenuElement[] { menuBar, menu, menu.getPopupMenu() } );
 

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

@@ -40,7 +40,7 @@ public class FlatMenuItemBorder
 		if( c.getParent() instanceof JMenuBar ) {
 			insets.top = scale( menuBarItemMargins.top );
 			insets.left = scale( menuBarItemMargins.left );
-			insets.bottom = scale( menuBarItemMargins.bottom + 1 );
+			insets.bottom = scale( menuBarItemMargins.bottom );
 			insets.right = scale( menuBarItemMargins.right );
 			return insets;
 		} else

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

@@ -40,6 +40,8 @@ import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.text.View;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.util.Graphics2DProxy;
+import com.formdev.flatlaf.util.HiDPIUtils;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Renderer for menu items.
@@ -260,7 +262,9 @@ debug*/
 
 			// paint background
 			g.setColor( armedOrSelected
-				? (isUnderlineSelection() ? underlineSelectionBackground : selectionBackground)
+				? (isUnderlineSelection()
+					? deriveBackground( underlineSelectionBackground )
+					: selectionBackground)
 				: menuItem.getBackground() );
 			g.fillRect( 0, 0, width, height );
 
@@ -282,12 +286,20 @@ debug*/
 		}
 	}
 
+	protected Color deriveBackground( Color background ) {
+		Color baseColor = menuItem.isOpaque()
+			? menuItem.getBackground()
+			: FlatUIUtils.getParentBackground( menuItem );
+
+		return FlatUIUtils.deriveColor( background, baseColor );
+	}
+
 	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.setColor( deriveBackground( isUnderlineSelection() ? underlineSelectionCheckBackground : checkBackground ) );
 			g.fillRect( r.x, r.y, r.width, r.height );
 		}
 
@@ -302,7 +314,7 @@ debug*/
 		}
 
 		int mnemonicIndex = FlatLaf.isShowMnemonics() ? menuItem.getDisplayedMnemonicIndex() : -1;
-		Color foreground = menuItem.getForeground();
+		Color foreground = (isTopLevelMenu( menuItem ) ? menuItem.getParent() : menuItem).getForeground();
 
 		paintText( g, menuItem, textRect, text, mnemonicIndex, menuItem.getFont(),
 			foreground, isUnderlineSelection() ? foreground : selectionForeground, disabledForeground );
@@ -360,7 +372,7 @@ debug*/
 		if( isArmedOrSelected( menuItem ) && selectionForeground != null )
 			g = new GraphicsProxyWithTextColor( (Graphics2D) g, selectionForeground );
 
-		htmlView.paint( g, textRect );
+		htmlView.paint( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ), textRect );
 	}
 
 	protected static boolean isArmedOrSelected( JMenuItem menuItem ) {
@@ -371,7 +383,7 @@ debug*/
 		return menuItem instanceof JMenu && ((JMenu)menuItem).isTopLevelMenu();
 	}
 
-	private boolean isUnderlineSelection() {
+	protected boolean isUnderlineSelection() {
 		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
 	}
 
@@ -407,32 +419,78 @@ debug*/
 
 	private KeyStroke cachedAccelerator;
 	private String cachedAcceleratorText;
+	private boolean cachedAcceleratorLeftToRight;
 
 	private String getAcceleratorText() {
 		KeyStroke accelerator = menuItem.getAccelerator();
 		if( accelerator == null )
 			return null;
 
-		if( accelerator == cachedAccelerator )
+		boolean leftToRight = menuItem.getComponentOrientation().isLeftToRight();
+
+		if( accelerator == cachedAccelerator && leftToRight == cachedAcceleratorLeftToRight )
 			return cachedAcceleratorText;
 
-		StringBuilder buf = new StringBuilder();
+		cachedAccelerator = accelerator;
-		int modifiers = accelerator.getModifiers();
+		cachedAcceleratorText = getTextForAccelerator( accelerator );
-		if( modifiers != 0 )
+		cachedAcceleratorLeftToRight = leftToRight;
-			buf.append( InputEvent.getModifiersExText( modifiers ) ).append( acceleratorDelimiter );
 
+		return cachedAcceleratorText;
+	}
+
+	protected String getTextForAccelerator( KeyStroke accelerator ) {
+		StringBuilder buf = new StringBuilder();
+		boolean leftToRight = menuItem.getComponentOrientation().isLeftToRight();
+
+		// modifiers
+		int modifiers = accelerator.getModifiers();
+		if( modifiers != 0 ) {
+			if( SystemInfo.isMacOS ) {
+				if( leftToRight )
+					buf.append( getMacOSModifiersExText( modifiers, leftToRight ) );
+			} else
+				buf.append( InputEvent.getModifiersExText( modifiers ) ).append( acceleratorDelimiter );
+		}
+
+		// key
 		int keyCode = accelerator.getKeyCode();
 		if( keyCode != 0 )
 			buf.append( KeyEvent.getKeyText( keyCode ) );
 		else
 			buf.append( accelerator.getKeyChar() );
 
-		cachedAccelerator = accelerator;
+		// modifiers if right-to-left on macOS
-		cachedAcceleratorText = buf.toString();
+		if( modifiers != 0 && !leftToRight && SystemInfo.isMacOS )
+			buf.append( getMacOSModifiersExText( modifiers, leftToRight ) );
 
-		return cachedAcceleratorText;
+		return buf.toString();
 	}
 
+	protected String getMacOSModifiersExText( int modifiers, boolean leftToRight ) {
+		StringBuilder buf = new StringBuilder();
+
+		if( (modifiers & InputEvent.CTRL_DOWN_MASK) != 0 )
+			buf.append( controlGlyph );
+		if( (modifiers & (InputEvent.ALT_DOWN_MASK | InputEvent.ALT_GRAPH_DOWN_MASK)) != 0 )
+			buf.append( optionGlyph );
+		if( (modifiers & InputEvent.SHIFT_DOWN_MASK) != 0 )
+			buf.append( shiftGlyph );
+		if( (modifiers & InputEvent.META_DOWN_MASK) != 0 )
+			buf.append( commandGlyph );
+
+		// reverse order for right-to-left
+		if( !leftToRight )
+			buf.reverse();
+
+		return buf.toString();
+	}
+
+	private static final char
+		controlGlyph = 0x2303,
+		optionGlyph = 0x2325,
+		shiftGlyph = 0x21E7,
+		commandGlyph = 0x2318;
+
 	//---- class MinSizeIcon --------------------------------------------------
 
 	private class MinSizeIcon

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

@@ -123,6 +123,14 @@ public class FlatMenuUI
 		};
 	}
 
+	@Override
+	public Dimension getMinimumSize( JComponent c ) {
+		// avoid that top-level menus (in menu bar) are made smaller if horizontal space is rare
+		// same code is in BasicMenuUI since Java 10
+		// see https://bugs.openjdk.java.net/browse/JDK-8178430
+		return ((JMenu)menuItem).isTopLevelMenu() ? c.getPreferredSize() : null;
+	}
+
 	@Override
 	protected Dimension getPreferredMenuItemSize( JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap ) {
 		return renderer.getPreferredMenuItemSize();
@@ -151,7 +159,7 @@ public class FlatMenuUI
 			if( model.isRollover() && !model.isArmed() && !model.isSelected() &&
 				model.isEnabled() && ((JMenu)menuItem).isTopLevelMenu() )
 			{
-				FlatUIUtils.setColor( g, hoverBackground, menuItem.getBackground() );
+				g.setColor( deriveBackground( hoverBackground ) );
 				g.fillRect( 0, 0, menuItem.getWidth(), menuItem.getHeight() );
 			} else
 				super.paintBackground( g, selectionBackground );

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

@@ -16,10 +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.awt.Graphics2D;
 import java.awt.Toolkit;
 import java.awt.event.FocusListener;
 import java.awt.event.KeyAdapter;
@@ -34,7 +34,7 @@ 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;
+import com.formdev.flatlaf.util.HiDPIUtils;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JPasswordField}.
@@ -57,11 +57,10 @@ 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
+ * @uiDefault PasswordField.showCapsLock			boolean
  * @uiDefault PasswordField.capsLockIcon			Icon
  * @uiDefault TextComponent.selectAllOnFocusPolicy	String	never, once (default) or always
  *
@@ -70,11 +69,10 @@ 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;
+	protected boolean showCapsLock;
 	protected Icon capsLockIcon;
 
 	private FocusListener focusListener;
@@ -89,16 +87,15 @@ 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" );
+		showCapsLock = UIManager.getBoolean( "PasswordField.showCapsLock" );
 		capsLockIcon = UIManager.getIcon( "PasswordField.capsLockIcon" );
 
-		LookAndFeel.installProperty( getComponent(), "opaque", focusWidth == 0 );
+		LookAndFeel.installProperty( getComponent(), "opaque", false );
 
-		MigLayoutVisualPadding.install( getComponent(), focusWidth );
+		MigLayoutVisualPadding.install( getComponent() );
 	}
 
 	@Override
@@ -153,20 +150,22 @@ public class FlatPasswordFieldUI
 	@Override
 	protected void propertyChange( PropertyChangeEvent e ) {
 		super.propertyChange( e );
-
+		FlatTextFieldUI.propertyChange( getComponent(), e );
-		if( FlatClientProperties.PLACEHOLDER_TEXT.equals( e.getPropertyName() ) )
-			getComponent().repaint();
 	}
 
 	@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 );
+
+		super.paintSafely( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ) );
 	}
 
 	protected void paintCapsLock( Graphics g ) {
+		if( !showCapsLock )
+			return;
+
 		JTextComponent c = getComponent();
 		if( !FlatUIUtils.isPermanentFocusOwner( c ) ||
 			!Toolkit.getDefaultToolkit().getLockingKeyState( KeyEvent.VK_CAPS_LOCK ) )
@@ -184,18 +183,11 @@ 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 );
+		return FlatTextFieldUI.applyMinimumWidth( c, super.getMinimumSize( c ), minimumWidth );
-	}
-
-	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;
 	}
 }

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

@@ -0,0 +1,502 @@
+/*
+ * 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.MouseInfo;
+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.JToolTip;
+import javax.swing.JWindow;
+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;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * 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
+	{
+		Point pt = fixToolTipLocation( owner, contents, x, y );
+		if( pt != null ) {
+			x = pt.x;
+			y = pt.y;
+		}
+
+		if( !isDropShadowPainted( owner, contents ) )
+			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, false ), contents );
+
+		// macOS and Linux adds drop shadow to heavy weight popups
+		if( SystemInfo.isMacOS || SystemInfo.isLinux ) {
+			Popup popup = getPopupForScreenOfOwner( owner, contents, x, y, true );
+			if( popup == null )
+				popup = getPopupForScreenOfOwner( owner, contents, x, y, false );
+			return new NonFlashingPopup( popup, contents );
+		}
+
+		// create drop shadow popup
+		return new DropShadowPopup( getPopupForScreenOfOwner( owner, contents, x, y, false ), owner, contents );
+	}
+
+	/**
+	 * Creates a popup for the screen that the owner component is on.
+	 * <p>
+	 * PopupFactory caches heavy weight popup windows and reuses them.
+	 * On a dual screen setup, if the popup owner has moved from one screen to the other one,
+	 * then the cached heavy weight popup window may be connected to the wrong screen.
+	 * If the two screens use different scaling factors, then the popup location and size
+	 * is scaled when the popup becomes visible, which shows the popup in the wrong location
+	 * (or on wrong screen). The re-scaling is done in WWindowPeer.setBounds() (Java 9+).
+	 * <p>
+	 * To fix this, dispose popup windows that are on wrong screen and get new popup.
+	 * <p>
+	 * This is a workaround for https://bugs.openjdk.java.net/browse/JDK-8224608
+	 */
+	private Popup getPopupForScreenOfOwner( Component owner, Component contents, int x, int y, boolean forceHeavyWeight )
+		throws IllegalArgumentException
+	{
+		int count = 0;
+
+		for(;;) {
+			// create new or get cached popup
+			Popup popup = forceHeavyWeight
+				? getHeavyWeightPopup( owner, contents, x, y )
+				: super.getPopup( owner, contents, x, y );
+
+			// get heavy weight popup window; is null for non-heavy weight popup
+			Window popupWindow = SwingUtilities.windowForComponent( contents );
+
+			// check whether heavy weight popup window is on same screen as owner component
+			if( popupWindow == null ||
+				popupWindow.getGraphicsConfiguration() == owner.getGraphicsConfiguration() )
+			  return popup;
+
+			// remove contents component from popup window
+			if( popupWindow instanceof JWindow )
+				((JWindow)popupWindow).getContentPane().removeAll();
+
+			// dispose unused popup
+			// (do not invoke popup.hide() because this would cache the popup window)
+			popupWindow.dispose();
+
+			// avoid endless loop (should newer happen; PopupFactory cache size is 5)
+			if( ++count > 10 )
+				return popup;
+		}
+	}
+
+	/**
+	 * Shows the given popup and, if necessary, fixes the location of a heavy weight popup window.
+	 * <p>
+	 * On a dual screen setup, where screens use different scale factors, it may happen
+	 * that the window location changes when showing a heavy weight popup window.
+	 * E.g. when opening an dialog on the secondary screen and making combobox popup visible.
+	 * <p>
+	 * This is a workaround for https://bugs.openjdk.java.net/browse/JDK-8224608
+	 */
+	private static void showPopupAndFixLocation( Popup popup, Window popupWindow ) {
+		if( popupWindow != null ) {
+			// remember location of heavy weight popup window
+			int x = popupWindow.getX();
+			int y = popupWindow.getY();
+
+			popup.show();
+
+			// restore popup window location if it has changed
+			// (probably scaled when screens use different scale factors)
+			if( popupWindow.getX() != x || popupWindow.getY() != y )
+				popupWindow.setLocation( x, y );
+		} else
+			popup.show();
+	}
+
+	private boolean 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.isJava_9_orLater ) {
+				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;
+		}
+	}
+
+	/**
+	 * Usually ToolTipManager places a tooltip at (mouseLocation.x, mouseLocation.y + 20).
+	 * In case that the tooltip would be partly outside of the screen,
+	 * ToolTipManagerthe changes the location so that the entire tooltip fits on screen.
+	 * But this can place the tooltip under the mouse location and hide the owner component.
+	 * <p>
+	 * This method checks whether the current mouse location is within tooltip bounds
+	 * and corrects the y-location so that the tooltip is placed above the mouse location.
+	 */
+	private Point fixToolTipLocation( Component owner, Component contents, int x, int y ) {
+		if( !(contents instanceof JToolTip) )
+			return null;
+
+		Point mouseLocation = MouseInfo.getPointerInfo().getLocation();
+		Dimension tipSize = contents.getPreferredSize();
+
+		// check whether mouse location is within tooltip bounds
+		Rectangle tipBounds = new Rectangle( x, y, tipSize.width, tipSize.height );
+		if( !tipBounds.contains( mouseLocation ) )
+			return null;
+
+		// place tooltip above mouse location
+		return new Point( x, mouseLocation.y - tipSize.height - UIScale.scale( 20 ) );
+	}
+
+	//---- class NonFlashingPopup ---------------------------------------------
+
+	private class NonFlashingPopup
+		extends Popup
+	{
+		private Popup delegate;
+		private Component contents;
+
+		// heavy weight
+		protected Window popupWindow;
+		private Color oldPopupWindowBackground;
+
+		NonFlashingPopup( Popup delegate, Component contents ) {
+			this.delegate = delegate;
+			this.contents = contents;
+
+			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 ) {
+				showPopupAndFixLocation( delegate, popupWindow );
+
+				// increase tooltip size if necessary because it may be too small on HiDPI screens
+				//    https://bugs.openjdk.java.net/browse/JDK-8213535
+				if( contents instanceof JToolTip ) {
+					Container parent = contents.getParent();
+					if( parent instanceof JPanel ) {
+						Dimension prefSize = parent.getPreferredSize();
+						if( !prefSize.equals( parent.getSize() ) ) {
+							Container panel = SwingUtilities.getAncestorOfClass( Panel.class, parent );
+							if( panel != null )
+								panel.setSize( prefSize ); // for medium weight popup
+							else
+								parent.setSize( prefSize ); // for light weight popup
+						}
+					}
+				}
+			}
+		}
+
+		@Override
+		public void hide() {
+			if( delegate != null ) {
+				delegate.hide();
+				delegate = null;
+				contents = 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 = getPopupForScreenOfOwner( owner, dropShadowPanel, x, y, true );
+
+				// 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 )
+				showPopupAndFixLocation( dropShadowDelegate, dropShadowWindow );
+
+			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/FlatPopupMenuUI.java

@@ -19,7 +19,6 @@ package com.formdev.flatlaf.ui;
 import javax.swing.JComponent;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicPopupMenuUI;
-import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JPopupMenu}.
@@ -36,28 +35,7 @@ import com.formdev.flatlaf.util.SystemInfo;
 public class FlatPopupMenuUI
 	extends BasicPopupMenuUI
 {
-	private boolean oldLightWeightPopupEnabled;
-
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatPopupMenuUI();
 	}
-
-	@Override
-	public void installDefaults() {
-		super.installDefaults();
-
-		// use heavy-weight popups on macOS to get nice drop shadow from OS
-		if( SystemInfo.IS_MAC ) {
-			oldLightWeightPopupEnabled = popupMenu.isLightWeightPopupEnabled();
-			popupMenu.setLightWeightPopupEnabled( false );
-		}
-	}
-
-	@Override
-	protected void uninstallDefaults() {
-		super.uninstallDefaults();
-
-		if( SystemInfo.IS_MAC )
-			popupMenu.setLightWeightPopupEnabled( oldLightWeightPopupEnabled );
-	}
 }

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

@@ -31,6 +31,7 @@ import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicProgressBarUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -194,6 +195,11 @@ public class FlatProgressBarUI
 		}
 	}
 
+	@Override
+	protected void paintString( Graphics g, int x, int y, int width, int height, int amountFull, Insets b ) {
+		super.paintString( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ), x, y, width, height, amountFull, b );
+	}
+
 	@Override
 	protected void setAnimationIndex( int newValue ) {
 		super.setAnimationIndex( newValue );

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)
+		// - if background was explicitly set to a non-UIResource color
-		//   - or 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() );
@@ -155,7 +153,7 @@ public class FlatRadioButtonUI
 			}
 		}
 
-		super.paint( g, c );
+		super.paint( FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c ), c );
 	}
 
 	@Override

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

@@ -16,23 +16,360 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Insets;
+import java.awt.LayoutManager;
+import java.awt.LayoutManager2;
+import java.awt.Window;
+import java.beans.PropertyChangeEvent;
+import java.util.function.Function;
 import javax.swing.JComponent;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
+import javax.swing.JLayeredPane;
+import javax.swing.JMenuBar;
+import javax.swing.JRootPane;
+import javax.swing.LookAndFeel;
+import javax.swing.UIManager;
+import javax.swing.plaf.BorderUIResource;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicRootPaneUI;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.util.HiDPIUtils;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JRootPane}.
  *
+ * <!-- FlatRootPaneUI -->
+ *
+ * @uiDefault RootPane.border								Border
+ * @uiDefault RootPane.activeBorderColor					Color
+ * @uiDefault RootPane.inactiveBorderColor					Color
+ *
+ * <!-- FlatWindowResizer -->
+ *
+ * @uiDefault RootPane.borderDragThickness					int
+ * @uiDefault RootPane.cornerDragWidth						int
+ * @uiDefault RootPane.honorFrameMinimumSizeOnResize		boolean
+ * @uiDefault RootPane.honorDialogMinimumSizeOnResize		boolean
+ *
  * @author Karl Tauber
  */
 public class FlatRootPaneUI
 	extends BasicRootPaneUI
 {
-	private static ComponentUI instance;
+	// check this field before using class JBRCustomDecorations to avoid unnecessary loading of that class
+	static final boolean canUseJBRCustomDecorations
+		= SystemInfo.isJetBrainsJVM_11_orLater && SystemInfo.isWindows_10_orLater;
+
+	protected JRootPane rootPane;
+	protected FlatTitlePane titlePane;
+	protected FlatWindowResizer windowResizer;
+
+	private LayoutManager oldLayout;
 
 	public static ComponentUI createUI( JComponent c ) {
-		if( instance == null )
+		return new FlatRootPaneUI();
-			instance = new FlatRootPaneUI();
+	}
-		return instance;
+
+	@Override
+	public void installUI( JComponent c ) {
+		super.installUI( c );
+
+		rootPane = (JRootPane) c;
+
+		if( rootPane.getWindowDecorationStyle() != JRootPane.NONE )
+			installClientDecorations();
+
+		if( canUseJBRCustomDecorations )
+			JBRCustomDecorations.install( rootPane );
+	}
+
+	@Override
+	public void uninstallUI( JComponent c ) {
+		super.uninstallUI( c );
+
+		uninstallClientDecorations();
+		rootPane = null;
+	}
+
+	@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" ) );
+		}
+
+		// enable dark window appearance on macOS when running in JetBrains Runtime
+		if( SystemInfo.isJetBrainsJVM && SystemInfo.isMacOS_10_14_Mojave_orLater ) {
+			LookAndFeel laf = UIManager.getLookAndFeel();
+			boolean isDark = laf instanceof FlatLaf && ((FlatLaf)laf).isDark();
+			c.putClientProperty( "jetbrains.awt.windowDarkAppearance", isDark );
+		}
+	}
+
+	protected void installClientDecorations() {
+		boolean isJBRSupported = canUseJBRCustomDecorations && JBRCustomDecorations.isSupported();
+
+		// install border
+		if( rootPane.getWindowDecorationStyle() != JRootPane.NONE && !isJBRSupported )
+			LookAndFeel.installBorder( rootPane, "RootPane.border" );
+		else
+			LookAndFeel.uninstallBorder( rootPane );
+
+		// install title pane
+		setTitlePane( createTitlePane() );
+
+		// install layout
+		oldLayout = rootPane.getLayout();
+		rootPane.setLayout( createRootLayout() );
+
+		// install window resizer
+		if( !isJBRSupported )
+			windowResizer = createWindowResizer();
+	}
+
+	protected void uninstallClientDecorations() {
+		LookAndFeel.uninstallBorder( rootPane );
+		setTitlePane( null );
+
+		if( windowResizer != null ) {
+			windowResizer.uninstall();
+			windowResizer = null;
+		}
+
+		if( oldLayout != null ) {
+			rootPane.setLayout( oldLayout );
+			oldLayout = null;
+		}
+
+		if( rootPane.getWindowDecorationStyle() == JRootPane.NONE ) {
+			rootPane.revalidate();
+			rootPane.repaint();
+		}
+	}
+
+	protected FlatRootLayout createRootLayout() {
+		return new FlatRootLayout();
+	}
+
+	protected FlatWindowResizer createWindowResizer() {
+		return new FlatWindowResizer.WindowResizer( rootPane );
+	}
+
+	protected FlatTitlePane createTitlePane() {
+		return new FlatTitlePane( rootPane );
+	}
+
+	// layer title pane under frame content layer to allow placing menu bar over title pane
+	protected final static Integer TITLE_PANE_LAYER = JLayeredPane.FRAME_CONTENT_LAYER - 1;
+
+	protected void setTitlePane( FlatTitlePane newTitlePane ) {
+		JLayeredPane layeredPane = rootPane.getLayeredPane();
+
+		if( titlePane != null )
+			layeredPane.remove( titlePane );
+
+		if( newTitlePane != null )
+			layeredPane.add( newTitlePane, TITLE_PANE_LAYER );
+
+		titlePane = newTitlePane;
+	}
+
+	@Override
+	public void propertyChange( PropertyChangeEvent e ) {
+		super.propertyChange( e );
+
+		switch( e.getPropertyName() ) {
+			case "windowDecorationStyle":
+				uninstallClientDecorations();
+				if( rootPane.getWindowDecorationStyle() != JRootPane.NONE )
+					installClientDecorations();
+				break;
+
+			case FlatClientProperties.MENU_BAR_EMBEDDED:
+				if( titlePane != null ) {
+					titlePane.menuBarChanged();
+					rootPane.revalidate();
+					rootPane.repaint();
+				}
+				break;
+		}
+	}
+
+	//---- class FlatRootLayout -----------------------------------------------
+
+	protected class FlatRootLayout
+		implements LayoutManager2
+	{
+		@Override public void addLayoutComponent( String name, Component comp ) {}
+		@Override public void addLayoutComponent( Component comp, Object constraints ) {}
+		@Override public void removeLayoutComponent( Component comp ) {}
+
+		@Override
+		public Dimension preferredLayoutSize( Container parent ) {
+			return computeLayoutSize( parent, c -> c.getPreferredSize() );
+		}
+
+		@Override
+		public Dimension minimumLayoutSize( Container parent ) {
+			return computeLayoutSize( parent, c -> c.getMinimumSize() );
+		}
+
+		@Override
+		public Dimension maximumLayoutSize( Container parent ) {
+			return new Dimension( Integer.MAX_VALUE, Integer.MAX_VALUE );
+		}
+
+		private Dimension computeLayoutSize( Container parent, Function<Component, Dimension> getSizeFunc ) {
+			JRootPane rootPane = (JRootPane) parent;
+
+			Dimension titlePaneSize = (titlePane != null)
+				? getSizeFunc.apply( titlePane )
+				: new Dimension();
+			Dimension contentSize = (rootPane.getContentPane() != null)
+				? getSizeFunc.apply( rootPane.getContentPane() )
+				: rootPane.getSize();
+
+			int width = Math.max( titlePaneSize.width, contentSize.width );
+			int height = titlePaneSize.height + contentSize.height;
+			if( titlePane == null || !titlePane.isMenuBarEmbedded() ) {
+				Dimension menuBarSize = (rootPane.getJMenuBar() != null)
+					? getSizeFunc.apply( rootPane.getJMenuBar() )
+					: new Dimension();
+
+				width = Math.max( width, menuBarSize.width );
+				height += menuBarSize.height;
+			}
+
+			Insets insets = rootPane.getInsets();
+
+			return new Dimension(
+				width + insets.left + insets.right,
+				height + insets.top + insets.bottom );
+		}
+
+		@Override
+		public void layoutContainer( Container parent ) {
+			JRootPane rootPane = (JRootPane) parent;
+
+			Insets insets = rootPane.getInsets();
+			int x = insets.left;
+			int y = insets.top;
+			int width = rootPane.getWidth() - insets.left - insets.right;
+			int height = rootPane.getHeight() - insets.top - insets.bottom;
+
+			if( rootPane.getLayeredPane() != null )
+				rootPane.getLayeredPane().setBounds( x, y, width, height );
+			if( rootPane.getGlassPane() != null )
+				rootPane.getGlassPane().setBounds( x, y, width, height );
+
+			int nextY = 0;
+			if( titlePane != null ) {
+				Dimension prefSize = titlePane.getPreferredSize();
+				titlePane.setBounds( 0, 0, width, prefSize.height );
+				nextY += prefSize.height;
+			}
+
+			JMenuBar menuBar = rootPane.getJMenuBar();
+			if( menuBar != null ) {
+				if( titlePane != null && titlePane.isMenuBarEmbedded() ) {
+					titlePane.validate();
+					menuBar.setBounds( titlePane.getMenuBarBounds() );
+				} else {
+					Dimension prefSize = menuBar.getPreferredSize();
+					menuBar.setBounds( 0, nextY, width, prefSize.height );
+					nextY += prefSize.height;
+				}
+			}
+
+			Container contentPane = rootPane.getContentPane();
+			if( contentPane != null )
+				contentPane.setBounds( 0, nextY, width, Math.max( height - nextY, 0 ) );
+
+			if( titlePane != null )
+				titlePane.menuBarLayouted();
+		}
+
+		@Override
+		public void invalidateLayout( Container parent ) {
+			if( titlePane != null )
+				titlePane.menuBarChanged();
+		}
+
+		@Override
+		public float getLayoutAlignmentX( Container target ) {
+			return 0;
+		}
+
+		@Override
+		public float getLayoutAlignmentY( Container target ) {
+			return 0;
+		}
+	}
+
+	//---- class FlatWindowBorder ---------------------------------------------
+
+	public static class FlatWindowBorder
+		extends BorderUIResource.EmptyBorderUIResource
+	{
+		protected final Color activeBorderColor = UIManager.getColor( "RootPane.activeBorderColor" );
+		protected final Color inactiveBorderColor = UIManager.getColor( "RootPane.inactiveBorderColor" );
+		protected final Color baseBorderColor = UIManager.getColor( "Panel.background" );
+
+		public FlatWindowBorder() {
+			super( 1, 1, 1, 1 );
+		}
+
+		@Override
+		public Insets getBorderInsets( Component c, Insets insets ) {
+			if( isWindowMaximized( c ) ) {
+				// hide border if window is maximized
+				insets.top = insets.left = insets.bottom = insets.right = 0;
+				return insets;
+			} else
+				return super.getBorderInsets( c, insets );
+		}
+
+		@Override
+		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+			if( isWindowMaximized( c ) )
+				return;
+
+			Container parent = c.getParent();
+			boolean active = parent instanceof Window ? ((Window)parent).isActive() : false;
+
+			g.setColor( FlatUIUtils.deriveColor( active ? activeBorderColor : inactiveBorderColor, baseBorderColor ) );
+			HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, width, height, this::paintImpl );
+		}
+
+		private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+			g.drawRect( x, y, width - 1, height - 1 );
+		}
+
+		protected boolean isWindowMaximized( Component c ) {
+			Container parent = c.getParent();
+			return parent instanceof Frame
+				? (((Frame)parent).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0
+				: false;
+		}
 	}
 }

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 +32,11 @@ public class FlatRoundBorder
 	protected final int arc = UIManager.getInt( "Component.arc" );
 
 	@Override
-	protected float getArc( Component c ) {
+	protected int getArc( Component c ) {
-		return scale( (float) arc );
+		if( isCellEditor( c ) )
+			return 0;
+
+		Boolean roundRect = FlatUIUtils.isRoundRect( c );
+		return roundRect != null ? (roundRect ? Short.MAX_VALUE : 0) : 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;
@@ -52,29 +55,49 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * <!-- FlatScrollBarUI -->
  *
- * @uiDefault ScrollBar.hoverTrackColor				Color
+ * @uiDefault ScrollBar.trackInsets					Insets
- * @uiDefault ScrollBar.hoverThumbColor				Color
+ * @uiDefault ScrollBar.thumbInsets					Insets
+ * @uiDefault ScrollBar.trackArc					int
+ * @uiDefault ScrollBar.thumbArc					int
+ * @uiDefault ScrollBar.hoverTrackColor				Color	optional
+ * @uiDefault ScrollBar.hoverThumbColor				Color	optional
+ * @uiDefault ScrollBar.hoverThumbWithTrack			boolean
+ * @uiDefault ScrollBar.pressedTrackColor			Color	optional
+ * @uiDefault ScrollBar.pressedThumbColor			Color	optional
+ * @uiDefault ScrollBar.pressedThumbWithTrack		boolean
  * @uiDefault Component.arrowType					String	triangle (default) or chevron
  * @uiDefault ScrollBar.showButtons					boolean
  * @uiDefault ScrollBar.buttonArrowColor			Color
  * @uiDefault ScrollBar.buttonDisabledArrowColor	Color
+ * @uiDefault ScrollBar.hoverButtonBackground		Color	optional
+ * @uiDefault ScrollBar.pressedButtonBackground		Color	optional
  *
  * @author Karl Tauber
  */
 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 Color pressedTrackColor;
+	protected Color pressedThumbColor;
+	protected boolean pressedThumbWithTrack;
 
 	protected boolean showButtons;
 	protected String arrowType;
 	protected Color buttonArrowColor;
 	protected Color buttonDisabledArrowColor;
+	protected Color hoverButtonBackground;
+	protected Color pressedButtonBackground;
 
 	private MouseAdapter hoverListener;
-	private boolean hoverTrack;
+	protected boolean hoverTrack;
-	private boolean hoverThumb;
+	protected boolean hoverThumb;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatScrollBarUI();
@@ -102,24 +125,40 @@ 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" );
+		pressedTrackColor = UIManager.getColor( "ScrollBar.pressedTrackColor" );
+		pressedThumbColor = UIManager.getColor( "ScrollBar.pressedThumbColor" );
+		pressedThumbWithTrack = UIManager.getBoolean( "ScrollBar.pressedThumbWithTrack" );
 
 		showButtons = UIManager.getBoolean( "ScrollBar.showButtons" );
 		arrowType = UIManager.getString( "Component.arrowType" );
 		buttonArrowColor = UIManager.getColor( "ScrollBar.buttonArrowColor" );
 		buttonDisabledArrowColor = UIManager.getColor( "ScrollBar.buttonDisabledArrowColor" );
+		hoverButtonBackground = UIManager.getColor( "ScrollBar.hoverButtonBackground" );
+		pressedButtonBackground = UIManager.getColor( "ScrollBar.pressedButtonBackground" );
 	}
 
 	@Override
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		trackInsets = null;
+		thumbInsets = null;
 		hoverTrackColor = null;
 		hoverThumbColor = null;
+		pressedTrackColor = null;
+		pressedThumbColor = null;
 
 		buttonArrowColor = null;
 		buttonDisabledArrowColor = null;
+		hoverButtonBackground = null;
+		pressedButtonBackground = null;
 	}
 
 	@Override
@@ -159,50 +198,61 @@ public class FlatScrollBarUI
 
 	@Override
 	protected JButton createDecreaseButton( int orientation ) {
-		return createArrowButton( orientation );
+		return new FlatScrollBarButton( orientation );
 	}
 
 	@Override
 	protected JButton createIncreaseButton( int orientation ) {
-		return createArrowButton( orientation );
+		return new FlatScrollBarButton( orientation );
 	}
 
-	private JButton createArrowButton( int orientation ) {
+	protected boolean isShowButtons() {
-		FlatArrowButton button = new FlatArrowButton( orientation,
-			arrowType, buttonArrowColor, buttonDisabledArrowColor, null, hoverTrackColor )
-		{
-			@Override
-			public Dimension getPreferredSize() {
-				if( isShowButtons() ) {
-					int w = UIScale.scale( scrollBarWidth );
-					return new Dimension( w, w );
-				} else
-					return new Dimension();
-			}
-
-			@Override
-			public Dimension getMinimumSize() {
-				return isShowButtons() ? super.getMinimumSize() : new Dimension();
-			}
-
-			@Override
-			public Dimension getMaximumSize() {
-				return isShowButtons() ? super.getMaximumSize() : new Dimension();
-			}
-		};
-		button.setArrowWidth( FlatArrowButton.DEFAULT_ARROW_WIDTH - 2 );
-		button.setFocusable( false );
-		button.setRequestFocusEnabled( false );
-		return button;
-	}
-
-	private boolean isShowButtons() {
 		Object showButtons = scrollbar.getClientProperty( FlatClientProperties.SCROLL_BAR_SHOW_BUTTONS );
 		if( showButtons == null && scrollbar.getParent() instanceof JScrollPane )
 			showButtons = ((JScrollPane)scrollbar.getParent()).getClientProperty( FlatClientProperties.SCROLL_BAR_SHOW_BUTTONS );
 		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, isPressed && hoverTrack && !hoverThumb ) );
+		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 || (hoverThumbWithTrack && hoverTrack),
+			isPressed && (hoverThumb || (pressedThumbWithTrack && hoverTrack)) ) );
+		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
@@ -213,29 +263,33 @@ public class FlatScrollBarUI
 		// do not paint
 	}
 
-	@Override
+	protected Color getTrackColor( JComponent c, boolean hover, boolean pressed ) {
-	protected void paintTrack( Graphics g, JComponent c, Rectangle trackBounds ) {
+		Color trackColor = FlatUIUtils.deriveColor( this.trackColor, c.getBackground() );
-		g.setColor( hoverTrack ? hoverTrackColor : trackColor );
+		return (pressed && pressedTrackColor != null)
-		g.fillRect( trackBounds.x, trackBounds.y, trackBounds.width, trackBounds.height );
+			? FlatUIUtils.deriveColor( pressedTrackColor, trackColor )
+			: ((hover && hoverTrackColor != null)
+				? FlatUIUtils.deriveColor( hoverTrackColor, trackColor )
+				: trackColor);
 	}
 
-	@Override
+	protected Color getThumbColor( JComponent c, boolean hover, boolean pressed ) {
-	protected void paintThumb( Graphics g, JComponent c, Rectangle thumbBounds ) {
+		Color trackColor = FlatUIUtils.deriveColor( this.trackColor, c.getBackground() );
-		if( thumbBounds.isEmpty() || !scrollbar.isEnabled() )
+		Color thumbColor = FlatUIUtils.deriveColor( this.thumbColor, trackColor );
-			return;
+		return (pressed && pressedThumbColor != null)
-
+			? FlatUIUtils.deriveColor( pressedThumbColor, thumbColor )
-		g.setColor( hoverThumb ? hoverThumbColor : thumbColor );
+			: ((hover && hoverThumbColor != null)
-		g.fillRect( thumbBounds.x, thumbBounds.y, thumbBounds.width, thumbBounds.height );
+				? FlatUIUtils.deriveColor( hoverThumbColor, thumbColor )
+				: thumbColor);
 	}
 
 	@Override
 	protected Dimension getMinimumThumbSize() {
-		return UIScale.scale( super.getMinimumThumbSize() );
+		return UIScale.scale( FlatUIUtils.addInsets( super.getMinimumThumbSize(), thumbInsets ) );
 	}
 
 	@Override
 	protected Dimension getMaximumThumbSize() {
-		return UIScale.scale( super.getMaximumThumbSize() );
+		return UIScale.scale( FlatUIUtils.addInsets( super.getMaximumThumbSize(), thumbInsets ) );
 	}
 
 	//---- class ScrollBarHoverListener ---------------------------------------
@@ -263,11 +317,14 @@ public class FlatScrollBarUI
 		@Override
 		public void mousePressed( MouseEvent e ) {
 			isPressed = true;
+			repaint();
 		}
 
 		@Override
 		public void mouseReleased( MouseEvent e ) {
 			isPressed = false;
+			repaint();
+
 			update( e.getX(), e.getY() );
 		}
 
@@ -286,4 +343,49 @@ public class FlatScrollBarUI
 				scrollbar.repaint();
 		}
 	}
+
+	//---- class FlatScrollBarButton ------------------------------------------
+
+	protected class FlatScrollBarButton
+		extends FlatArrowButton
+	{
+		protected FlatScrollBarButton( int direction ) {
+			this( direction, arrowType, buttonArrowColor, buttonDisabledArrowColor,
+				null, hoverButtonBackground, pressedButtonBackground );
+		}
+
+		protected FlatScrollBarButton( int direction, String type, Color foreground, Color disabledForeground,
+			Color hoverForeground, Color hoverBackground, Color pressedBackground )
+		{
+			super( direction, type, foreground, disabledForeground, hoverForeground, hoverBackground, pressedBackground );
+
+			setArrowWidth( FlatArrowButton.DEFAULT_ARROW_WIDTH - 2 );
+			setFocusable( false );
+			setRequestFocusEnabled( false );
+		}
+
+		@Override
+		protected Color deriveBackground( Color background ) {
+			return FlatUIUtils.deriveColor( background, scrollbar.getBackground() );
+		}
+
+		@Override
+		public Dimension getPreferredSize() {
+			if( isShowButtons() ) {
+				int w = UIScale.scale( scrollBarWidth );
+				return new Dimension( w, w );
+			} else
+				return new Dimension();
+		}
+
+		@Override
+		public Dimension getMinimumSize() {
+			return isShowButtons() ? super.getMinimumSize() : new Dimension();
+		}
+
+		@Override
+		public Dimension getMaximumSize() {
+			return isShowButtons() ? super.getMaximumSize() : new Dimension();
+		}
+	}
 }

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
@@ -114,10 +114,7 @@ public class FlatScrollPaneUI
 		return new BasicScrollPaneUI.MouseWheelHandler() {
 			@Override
 			public void mouseWheelMoved( MouseWheelEvent e ) {
-				// Note: Getting UI value "ScrollPane.smoothScrolling" here to allow
+				if( isSmoothScrollingEnabled() &&
-				// applications to turn smooth scrolling on or off at any time
-				// (e.g. in application options dialog).
-				if( UIManager.getBoolean( "ScrollPane.smoothScrolling" ) &&
 					scrollpane.isWheelScrollingEnabled() &&
 					e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL &&
 					e.getPreciseWheelRotation() != 0 &&
@@ -130,6 +127,17 @@ public class FlatScrollPaneUI
 		};
 	}
 
+	protected boolean isSmoothScrollingEnabled() {
+		Object smoothScrolling = scrollpane.getClientProperty( FlatClientProperties.SCROLL_PANE_SMOOTH_SCROLLING );
+		if( smoothScrolling instanceof Boolean )
+			return (Boolean) smoothScrolling;
+
+		// Note: Getting UI value "ScrollPane.smoothScrolling" here to allow
+		// applications to turn smooth scrolling on or off at any time
+		// (e.g. in application options dialog).
+		return UIManager.getBoolean( "ScrollPane.smoothScrolling" );
+	}
+
 	private static final double EPSILON = 1e-5d;
 
 	private void mouseWheelMovedSmooth( MouseWheelEvent e ) {

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}.
@@ -56,9 +57,8 @@ import javax.swing.plaf.basic.BasicSpinnerUI;
  *
  * <!-- FlatSpinnerUI -->
  *
- * @uiDefault Component.focusWidth				int
- * @uiDefault Component.arc						int
  * @uiDefault Component.minimumWidth			int
+ * @uiDefault Spinner.buttonStyle				String	button (default) or none
  * @uiDefault Component.arrowType				String	triangle (default) or chevron
  * @uiDefault Component.isIntelliJTheme			boolean
  * @uiDefault Component.borderColor				Color
@@ -78,9 +78,8 @@ public class FlatSpinnerUI
 {
 	private Handler handler;
 
-	protected int focusWidth;
-	protected int arc;
 	protected int minimumWidth;
+	protected String buttonStyle;
 	protected String arrowType;
 	protected boolean isIntelliJTheme;
 	protected Color borderColor;
@@ -103,9 +102,8 @@ public class FlatSpinnerUI
 
 		LookAndFeel.installProperty( spinner, "opaque", false );
 
-		focusWidth = UIManager.getInt( "Component.focusWidth" );
-		arc = UIManager.getInt( "Component.arc" );
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
+		buttonStyle = UIManager.getString( "Spinner.buttonStyle" );
 		arrowType = UIManager.getString( "Component.arrowType" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 		borderColor = UIManager.getColor( "Component.borderColor" );
@@ -121,7 +119,7 @@ public class FlatSpinnerUI
 		// scale
 		padding = scale( padding );
 
-		MigLayoutVisualPadding.install( spinner, focusWidth );
+		MigLayoutVisualPadding.install( spinner );
 	}
 
 	@Override
@@ -146,6 +144,7 @@ public class FlatSpinnerUI
 		super.installListeners();
 
 		addEditorFocusListener( spinner.getEditor() );
+		spinner.addFocusListener( getHandler() );
 		spinner.addPropertyChangeListener( getHandler() );
 	}
 
@@ -154,6 +153,7 @@ public class FlatSpinnerUI
 		super.uninstallListeners();
 
 		removeEditorFocusListener( spinner.getEditor() );
+		spinner.removeFocusListener( getHandler() );
 		spinner.removePropertyChangeListener( getHandler() );
 
 		handler = null;
@@ -206,17 +206,27 @@ public class FlatSpinnerUI
 			// use non-UIResource colors because when SwingUtilities.updateComponentTreeUI()
 			// is used, then the text field is updated after the spinner and the
 			// colors are again replaced with default colors
-			textField.setForeground( FlatUIUtils.nonUIResource( spinner.getForeground() ) );
+			textField.setForeground( FlatUIUtils.nonUIResource( getForeground( true ) ) );
-			textField.setDisabledTextColor( FlatUIUtils.nonUIResource( disabledForeground ) );
+			textField.setDisabledTextColor( FlatUIUtils.nonUIResource( getForeground( false ) ) );
 		}
 	}
 
-	private JTextField getEditorTextField( JComponent editor ) {
+	private static JTextField getEditorTextField( JComponent editor ) {
 		return editor instanceof JSpinner.DefaultEditor
 			? ((JSpinner.DefaultEditor)editor).getTextField()
 			: null;
 	}
 
+	protected Color getBackground( boolean enabled ) {
+		return enabled
+			? spinner.getBackground()
+			: (isIntelliJTheme ? FlatUIUtils.getParentBackground( spinner ) : disabledBackground);
+	}
+
+	protected Color getForeground( boolean enabled ) {
+		return enabled ? spinner.getForeground() : disabledForeground;
+	}
+
 	@Override
 	protected LayoutManager createLayout() {
 		return getHandler();
@@ -246,8 +256,11 @@ 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;
@@ -255,22 +268,19 @@ 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();
+		boolean paintButton = !"none".equals( buttonStyle );
 		boolean enabled = spinner.isEnabled();
 		boolean isLeftToRight = spinner.getComponentOrientation().isLeftToRight();
 
 		// paint background
-		g2.setColor( enabled
+		g2.setColor( getBackground( enabled ) );
-			? c.getBackground()
-			: (isIntelliJTheme ? FlatUIUtils.getParentBackground( c ) : disabledBackground) );
 		FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
 
 		// paint arrow buttons background
-		if( enabled ) {
+		if( paintButton && enabled ) {
 			g2.setColor( buttonBackground );
 			Shape oldClip = g2.getClip();
 			if( isLeftToRight )
@@ -282,10 +292,12 @@ public class FlatSpinnerUI
 		}
 
 		// paint vertical line between value and arrow buttons
-		g2.setColor( enabled ? borderColor : disabledBorderColor );
+		if( paintButton ) {
-		float lw = scale( 1f );
+			g2.setColor( enabled ? borderColor : disabledBorderColor );
-		float lx = isLeftToRight ? arrowX : arrowX + arrowWidth - lw;
+			float lw = scale( 1f );
-		g2.fill( new Rectangle2D.Float( lx, focusWidth, lw, height - 1 - (focusWidth * 2) ) );
+			float lx = isLeftToRight ? arrowX : arrowX + arrowWidth - lw;
+			g2.fill( new Rectangle2D.Float( lx, focusWidth, lw, height - 1 - (focusWidth * 2) ) );
+		}
 
 		paint( g, c );
 	}
@@ -328,8 +340,9 @@ 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 +381,14 @@ 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,
+				// for precise layout of arrows, the "previous" button has the same height
-					buttonsRect.width, buttonsRect.height - nextHeight );
+				// 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 +397,13 @@ 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 +420,14 @@ 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/FlatSplitPaneUI.java

@@ -87,10 +87,10 @@ public class FlatSplitPaneUI
 
 	//---- class FlatSplitPaneDivider -----------------------------------------
 
-	private class FlatSplitPaneDivider
+	protected class FlatSplitPaneDivider
 		extends BasicSplitPaneDivider
 	{
-		public FlatSplitPaneDivider( BasicSplitPaneUI ui ) {
+		protected FlatSplitPaneDivider( BasicSplitPaneUI ui ) {
 			super( ui );
 		}
 

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

@@ -333,28 +333,30 @@ public class FlatTabbedPaneUI
 		// paint tab separators
 		if( clientPropertyBoolean( tabPane, TABBED_PANE_SHOW_TAB_SEPARATORS, showTabSeparators ) &&
 			!isLastInRun( tabIndex ) )
-		{
+		  paintTabSeparator( g, tabPlacement, x, y, w, h );
-			float sepWidth = UIScale.scale( 1f );
-			float offset = tabSeparatorsFullHeight ? 0 : UIScale.scale( 5f );
-
-			g.setColor( (tabSeparatorColor != null) ? tabSeparatorColor : contentAreaColor );
-			if( tabPlacement == LEFT || tabPlacement == RIGHT ) {
-				// paint tab separator at bottom side
-				((Graphics2D)g).fill( new Rectangle2D.Float( x + offset, y + h - sepWidth, w - (offset * 2), sepWidth ) );
-			} else if( tabPane.getComponentOrientation().isLeftToRight() ) {
-				// paint tab separator at right side
-				((Graphics2D)g).fill( new Rectangle2D.Float( x + w - sepWidth, y + offset, sepWidth, h - (offset * 2) ) );
-			} else {
-				// paint tab separator at left side
-				((Graphics2D)g).fill( new Rectangle2D.Float( x, y + offset, sepWidth, h - (offset * 2) ) );
-			}
-		}
 
 		if( isSelected )
 			paintTabSelection( g, tabPlacement, x, y, w, h );
 	}
 
-	protected void paintTabSelection( Graphics g, int tabPlacement,  int x, int y, int w, int h ) {
+	protected void paintTabSeparator( Graphics g, int tabPlacement, int x, int y, int w, int h ) {
+		float sepWidth = UIScale.scale( 1f );
+		float offset = tabSeparatorsFullHeight ? 0 : UIScale.scale( 5f );
+
+		g.setColor( (tabSeparatorColor != null) ? tabSeparatorColor : contentAreaColor );
+		if( tabPlacement == LEFT || tabPlacement == RIGHT ) {
+			// paint tab separator at bottom side
+			((Graphics2D)g).fill( new Rectangle2D.Float( x + offset, y + h - sepWidth, w - (offset * 2), sepWidth ) );
+		} else if( tabPane.getComponentOrientation().isLeftToRight() ) {
+			// paint tab separator at right side
+			((Graphics2D)g).fill( new Rectangle2D.Float( x + w - sepWidth, y + offset, sepWidth, h - (offset * 2) ) );
+		} else {
+			// paint tab separator at left side
+			((Graphics2D)g).fill( new Rectangle2D.Float( x, y + offset, sepWidth, h - (offset * 2) ) );
+		}
+	}
+
+	protected void paintTabSelection( Graphics g, int tabPlacement, int x, int y, int w, int h ) {
 		// increase clip bounds in scroll-tab-layout to paint over the separator line
 		Rectangle clipBounds = isScrollTabLayout() ? g.getClipBounds() : null;
 		if( clipBounds != null ) {

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

@@ -86,7 +86,7 @@ public class FlatTableCellBorder
 		/**
 		 * Checks whether at least one selected cell is editable.
 		 */
-		private boolean isSelectionEditable( JTable table ) {
+		protected boolean isSelectionEditable( JTable table ) {
 			if( table.getRowSelectionAllowed() ) {
 				int columnCount = table.getColumnCount();
 				int[] selectedRows = table.getSelectedRows();

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

@@ -86,26 +86,12 @@ public class FlatTableHeaderUI
 			case "top":		sortIconPosition = SwingConstants.TOP; break;
 			case "bottom":	sortIconPosition = SwingConstants.BOTTOM; break;
 		}
-
-		// use own renderer if necessary
-		if( sortIconPosition != SwingConstants.RIGHT ) {
-			TableCellRenderer defaultRenderer = header.getDefaultRenderer();
-			if( defaultRenderer instanceof UIResource )
-				header.setDefaultRenderer( new FlatTableCellHeaderRenderer( defaultRenderer ) );
-		}
 	}
 
 	@Override
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
-		// restore default renderer
-		TableCellRenderer defaultRenderer = header.getDefaultRenderer();
-		if( defaultRenderer instanceof FlatTableCellHeaderRenderer ) {
-			((FlatTableCellHeaderRenderer)defaultRenderer).reset();
-			header.setDefaultRenderer( ((FlatTableCellHeaderRenderer)defaultRenderer).delegate );
-		}
-
 		separatorColor = null;
 		bottomSeparatorColor = null;
 	}
@@ -125,8 +111,22 @@ public class FlatTableHeaderUI
 		if( paintBorders )
 			paintColumnBorders( g, c );
 
+		// temporary use own default renderer if necessary
+		FlatTableCellHeaderRenderer sortIconRenderer = null;
+		if( sortIconPosition != SwingConstants.RIGHT ) {
+			sortIconRenderer = new FlatTableCellHeaderRenderer( header.getDefaultRenderer() );
+			header.setDefaultRenderer( sortIconRenderer );
+		}
+
+		// paint header
 		super.paint( g, c );
 
+		// restore default renderer
+		if( sortIconRenderer != null ) {
+			sortIconRenderer.reset();
+			header.setDefaultRenderer( sortIconRenderer.delegate );
+		}
+
 		if( paintBorders )
 			paintDraggedColumnBorders( g, c );
 	}
@@ -158,7 +158,7 @@ public class FlatTableHeaderUI
 			g2.setColor( separatorColor );
 
 			int sepCount = columnCount;
-			if( header.getTable().getAutoResizeMode() != JTable.AUTO_RESIZE_OFF && !isVerticalScrollBarVisible() )
+			if( header.getTable() != null && header.getTable().getAutoResizeMode() != JTable.AUTO_RESIZE_OFF && !isVerticalScrollBarVisible() )
 				sepCount--;
 
 			if( header.getComponentOrientation().isLeftToRight() ) {
@@ -257,6 +257,7 @@ public class FlatTableHeaderUI
 	{
 		private final TableCellRenderer delegate;
 
+		private JLabel l;
 		private int oldHorizontalTextPosition = -1;
 		private Border origBorder;
 		private Icon sortIcon;
@@ -273,7 +274,7 @@ public class FlatTableHeaderUI
 			if( !(c instanceof JLabel) )
 				return c;
 
-			JLabel l = (JLabel) c;
+			l = (JLabel) c;
 
 			if( sortIconPosition == SwingConstants.LEFT ) {
 				if( oldHorizontalTextPosition < 0 )
@@ -291,11 +292,8 @@ public class FlatTableHeaderUI
 		}
 
 		void reset() {
-			if( sortIconPosition == SwingConstants.LEFT && oldHorizontalTextPosition >= 0 ) {
+			if( l != null && sortIconPosition == SwingConstants.LEFT && oldHorizontalTextPosition >= 0 )
-				Component c = getTableCellRendererComponent( header.getTable(), "", false, false, -1, 0 );
+				l.setHorizontalTextPosition( oldHorizontalTextPosition );
-				if( c instanceof JLabel && ((JLabel)c).getHorizontalTextPosition() == SwingConstants.RIGHT )
-					((JLabel)c).setHorizontalTextPosition( oldHorizontalTextPosition );
-			}
 		}
 
 		@Override

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

@@ -18,13 +18,16 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
 import java.awt.Dimension;
+import java.awt.EventQueue;
 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;
 
 /**
@@ -68,6 +71,10 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Table.cellFocusColor						Color
  * @uiDefault Table.showCellFocusIndicator				boolean
  *
+ * <!-- FlatInputMaps -->
+ *
+ * @uiDefault Table.consistentHomeEndKeyBehavior		boolean
+ *
  * @author Karl Tauber
  */
 public class FlatTableUI
@@ -90,16 +97,6 @@ public class FlatTableUI
 		return new FlatTableUI();
 	}
 
-	@Override
-	public void installUI( JComponent c ) {
-		super.installUI( c );
-	}
-
-	@Override
-	public void uninstallUI( JComponent c ) {
-		super.uninstallUI( c );
-	}
-
 	@Override
 	protected void installDefaults() {
 		super.installDefaults();
@@ -132,6 +129,12 @@ 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
@@ -166,7 +169,11 @@ public class FlatTableUI
 			@Override
 			public void focusLost( FocusEvent e ) {
 				super.focusLost( e );
-				toggleSelectionColors();
+
+				// use invokeLater for the case that the window is deactivated
+				EventQueue.invokeLater( () -> {
+					toggleSelectionColors();
+				} );
 			}
 		};
 	}
@@ -181,6 +188,9 @@ public class FlatTableUI
 	 * or the application has to be changed to extend a FlatLaf renderer.
 	 */
 	private void toggleSelectionColors() {
+		if( table == null )
+			return;
+
 		if( FlatUIUtils.isPermanentFocusOwner( table ) ) {
 			if( table.getSelectionBackground() == selectionInactiveBackground )
 				table.setSelectionBackground( selectionBackground );

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

@@ -16,10 +16,11 @@
 
 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.awt.Graphics2D;
+import java.beans.PropertyChangeEvent;
 import javax.swing.JComponent;
 import javax.swing.JTextArea;
 import javax.swing.UIManager;
@@ -27,6 +28,7 @@ import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicTextAreaUI;
 import javax.swing.text.JTextComponent;
+import com.formdev.flatlaf.util.HiDPIUtils;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JTextArea}.
@@ -58,6 +60,7 @@ public class FlatTextAreaUI
 {
 	protected int minimumWidth;
 	protected boolean isIntelliJTheme;
+	protected Color background;
 	protected Color disabledBackground;
 	protected Color inactiveBackground;
 
@@ -65,12 +68,20 @@ public class FlatTextAreaUI
 		return new FlatTextAreaUI();
 	}
 
+	@Override
+	public void installUI( JComponent c ) {
+		super.installUI( c );
+
+		updateBackground();
+	}
+
 	@Override
 	protected void installDefaults() {
 		super.installDefaults();
 
 		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
+		background = UIManager.getColor( "TextArea.background" );
 		disabledBackground = UIManager.getColor( "TextArea.disabledBackground" );
 		inactiveBackground = UIManager.getColor( "TextArea.inactiveBackground" );
 	}
@@ -79,46 +90,80 @@ public class FlatTextAreaUI
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		background = null;
 		disabledBackground = null;
 		inactiveBackground = null;
 	}
 
+	@Override
+	protected void propertyChange( PropertyChangeEvent e ) {
+		super.propertyChange( e );
+		FlatEditorPaneUI.propertyChange( getComponent(), e );
+
+		switch( e.getPropertyName() ) {
+			case "editable":
+			case "enabled":
+				updateBackground();
+				break;
+		}
+	}
+
+	private void updateBackground() {
+		JTextComponent c = getComponent();
+
+		Color background = c.getBackground();
+		if( !(background instanceof UIResource) )
+			return;
+
+		// do not update background if it currently has a unknown color (assigned from outside)
+		if( background != this.background &&
+			background != disabledBackground &&
+			background != inactiveBackground )
+		  return;
+
+		Color newBackground = !c.isEnabled()
+			? disabledBackground
+			: (!c.isEditable()
+				? inactiveBackground
+				: this.background);
+
+		if( newBackground != background )
+			c.setBackground( newBackground );
+	}
+
+	@Override
+	public Dimension getPreferredSize( JComponent c ) {
+		return applyMinimumWidth( c, super.getPreferredSize( c ) );
+	}
+
+	@Override
+	public Dimension getMinimumSize( JComponent c ) {
+		return applyMinimumWidth( c, super.getMinimumSize( 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;
+
+		return FlatEditorPaneUI.applyMinimumWidth( c, size, minimumWidth );
+	}
+
+	@Override
+	protected void paintSafely( Graphics g ) {
+		super.paintSafely( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ) );
+	}
+
 	@Override
 	protected void paintBackground( Graphics g ) {
 		JTextComponent c = getComponent();
 
-		Color background = c.getBackground();
+		// for compatibility with IntelliJ themes
-		g.setColor( !(background instanceof UIResource)
+		if( isIntelliJTheme && (!c.isEnabled() || !c.isEditable()) && (c.getBackground() instanceof UIResource) ) {
-			? background
+			FlatUIUtils.paintParentBackground( g, c );
-			: (isIntelliJTheme && (!c.isEnabled() || !c.isEditable())
+			return;
-				? FlatUIUtils.getParentBackground( c )
+		}
-				: (!c.isEnabled()
-					? disabledBackground
-					: (!c.isEditable() ? inactiveBackground : background))) );
-		g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
-	}
 
-	@Override
+		super.paintBackground( g );
-	public Dimension getPreferredSize( JComponent c ) {
-		return applyMinimumWidth( super.getPreferredSize( c ), c );
-	}
-
-	@Override
-	public Dimension getMinimumSize( JComponent c ) {
-		return applyMinimumWidth( super.getMinimumSize( c ), c );
-	}
-
-	private Dimension applyMinimumWidth( Dimension size, JComponent c ) {
-		// 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;
 	}
 }

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 +32,11 @@ public class FlatTextBorder
 	protected final int arc = UIManager.getInt( "TextComponent.arc" );
 
 	@Override
-	protected float getArc( Component c ) {
+	protected int getArc( Component c ) {
-		return scale( (float) arc );
+		if( isCellEditor( c ) )
+			return 0;
+
+		Boolean roundRect = FlatUIUtils.isRoundRect( c );
+		return roundRect != null ? (roundRect ? Short.MAX_VALUE : 0) : arc;
 	}
 }

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

@@ -32,13 +32,13 @@ 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;
 import javax.swing.text.Caret;
 import javax.swing.text.JTextComponent;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.util.HiDPIUtils;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JTextField}.
@@ -60,8 +60,6 @@ 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 +70,6 @@ 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 +85,13 @@ 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
@@ -133,16 +127,28 @@ public class FlatTextFieldUI
 	@Override
 	protected void propertyChange( PropertyChangeEvent e ) {
 		super.propertyChange( e );
+		propertyChange( getComponent(), e );
+	}
 
-		if( FlatClientProperties.PLACEHOLDER_TEXT.equals( e.getPropertyName() ) )
+	static void propertyChange( JTextComponent c, PropertyChangeEvent e ) {
-			getComponent().repaint();
+		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 );
+
+		super.paintSafely( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ) );
 	}
 
 	@Override
@@ -150,19 +156,20 @@ public class FlatTextFieldUI
 		// background is painted elsewhere
 	}
 
-	static void paintBackground( Graphics g, JTextComponent c, int focusWidth, int arc, boolean isIntelliJTheme ) {
+	static void paintBackground( Graphics g, JTextComponent c, boolean isIntelliJTheme ) {
-		Border border = c.getBorder();
-
 		// 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 +177,13 @@ 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 +216,29 @@ 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 );
+		minimumWidth = FlatUIUtils.minimumWidth( c, minimumWidth );
-		int focusWidth = (c.getBorder() instanceof FlatBorder) ? this.focusWidth : 0;
+		float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
-		size.width = Math.max( size.width, scale( minimumWidth + (focusWidth * 2) ) );
+		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 +16,10 @@
 
 package com.formdev.flatlaf.ui;
 
-import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
+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.BasicTextPaneUI;
 import javax.swing.text.JTextComponent;
+import com.formdev.flatlaf.util.HiDPIUtils;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JTextPane}.
@@ -83,24 +85,25 @@ 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 ) );
+		return FlatEditorPaneUI.applyMinimumWidth( c, super.getMinimumSize( c ), minimumWidth );
 	}
 
-	private Dimension applyMinimumWidth( Dimension size ) {
+	@Override
-		// Assume that text area is in a scroll pane (that displays the border)
+	protected void paintSafely( Graphics g ) {
-		// and subtract 1px border line width.
+		super.paintSafely( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ) );
-		// 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;
 	}
 
 	@Override

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

@@ -0,0 +1,854 @@
+/*
+ * 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.BorderLayout;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dialog;
+import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.GraphicsConfiguration;
+import java.awt.Image;
+import java.awt.Insets;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Window;
+import java.awt.event.ActionListener;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.awt.geom.AffineTransform;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import javax.accessibility.AccessibleContext;
+import javax.swing.BorderFactory;
+import javax.swing.BoxLayout;
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JMenuBar;
+import javax.swing.JPanel;
+import javax.swing.JRootPane;
+import javax.swing.SwingConstants;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.border.AbstractBorder;
+import javax.swing.border.Border;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatSystemProperties;
+import com.formdev.flatlaf.ui.JBRCustomDecorations.JBRWindowTopBorder;
+import com.formdev.flatlaf.util.ScaledImageIcon;
+import com.formdev.flatlaf.util.SystemInfo;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * Provides the Flat LaF title bar.
+ *
+ * @uiDefault TitlePane.background							Color
+ * @uiDefault TitlePane.inactiveBackground					Color
+ * @uiDefault TitlePane.foreground							Color
+ * @uiDefault TitlePane.inactiveForeground					Color
+ * @uiDefault TitlePane.embeddedForeground					Color
+ * @uiDefault TitlePane.iconSize							Dimension
+ * @uiDefault TitlePane.iconMargins							Insets
+ * @uiDefault TitlePane.titleMargins						Insets
+ * @uiDefault TitlePane.menuBarMargins						Insets
+ * @uiDefault TitlePane.menuBarEmbedded						boolean
+ * @uiDefault TitlePane.buttonMaximizedHeight				int
+ * @uiDefault TitlePane.closeIcon							Icon
+ * @uiDefault TitlePane.iconifyIcon							Icon
+ * @uiDefault TitlePane.maximizeIcon						Icon
+ * @uiDefault TitlePane.restoreIcon							Icon
+ *
+ * @author Karl Tauber
+ */
+public class FlatTitlePane
+	extends JComponent
+{
+	protected final Color activeBackground = UIManager.getColor( "TitlePane.background" );
+	protected final Color inactiveBackground = UIManager.getColor( "TitlePane.inactiveBackground" );
+	protected final Color activeForeground = UIManager.getColor( "TitlePane.foreground" );
+	protected final Color inactiveForeground = UIManager.getColor( "TitlePane.inactiveForeground" );
+	protected final Color embeddedForeground = UIManager.getColor( "TitlePane.embeddedForeground" );
+
+	protected final Insets menuBarMargins = UIManager.getInsets( "TitlePane.menuBarMargins" );
+	protected final Dimension iconSize = UIManager.getDimension( "TitlePane.iconSize" );
+	protected final int buttonMaximizedHeight = UIManager.getInt( "TitlePane.buttonMaximizedHeight" );
+
+	protected final JRootPane rootPane;
+
+	protected JPanel leftPanel;
+	protected JLabel iconLabel;
+	protected JComponent menuBarPlaceholder;
+	protected JLabel titleLabel;
+	protected JPanel buttonPanel;
+	protected JButton iconifyButton;
+	protected JButton maximizeButton;
+	protected JButton restoreButton;
+	protected JButton closeButton;
+
+	protected Window window;
+
+	private final Handler handler;
+
+	public FlatTitlePane( JRootPane rootPane ) {
+		this.rootPane = rootPane;
+
+		handler = createHandler();
+		setBorder( createTitlePaneBorder() );
+
+		addSubComponents();
+		activeChanged( true );
+
+		addMouseListener( handler );
+		addMouseMotionListener( handler );
+
+		// necessary for closing window with double-click on icon
+		iconLabel.addMouseListener( handler );
+	}
+
+	protected FlatTitlePaneBorder createTitlePaneBorder() {
+		return new FlatTitlePaneBorder();
+	}
+
+	protected Handler createHandler() {
+		return new Handler();
+	}
+
+	protected void addSubComponents() {
+		leftPanel = new JPanel();
+		iconLabel = new JLabel();
+		titleLabel = new JLabel();
+		iconLabel.setBorder( new FlatEmptyBorder( UIManager.getInsets( "TitlePane.iconMargins" ) ) );
+		titleLabel.setBorder( new FlatEmptyBorder( UIManager.getInsets( "TitlePane.titleMargins" ) ) );
+
+		leftPanel.setLayout( new BoxLayout( leftPanel, BoxLayout.LINE_AXIS ) );
+		leftPanel.setOpaque( false );
+		leftPanel.add( iconLabel );
+
+		menuBarPlaceholder = new JComponent() {
+			@Override
+			public Dimension getPreferredSize() {
+				JMenuBar menuBar = rootPane.getJMenuBar();
+				return (menuBar != null && isMenuBarEmbedded())
+					? FlatUIUtils.addInsets( menuBar.getPreferredSize(), UIScale.scale( menuBarMargins ) )
+					: new Dimension();
+			}
+		};
+		leftPanel.add( menuBarPlaceholder );
+
+		createButtons();
+
+		setLayout( new BorderLayout() {
+			@Override
+			public void layoutContainer( Container target ) {
+				super.layoutContainer( target );
+
+				// make left panel (with embedded menu bar) smaller if horizontal space is rare
+				// to avoid that embedded menu bar overlaps button bar
+				Insets insets = target.getInsets();
+				int width = target.getWidth() - insets.left - insets.right;
+				if( leftPanel.getWidth() + buttonPanel.getWidth() > width ) {
+					int oldWidth = leftPanel.getWidth();
+					int newWidth = Math.max( width - buttonPanel.getWidth(), 0 );
+					leftPanel.setSize( newWidth, leftPanel.getHeight() );
+					if( !getComponentOrientation().isLeftToRight() )
+						leftPanel.setLocation( leftPanel.getX() + (oldWidth - newWidth), leftPanel.getY() );
+				}
+			}
+		} );
+
+		add( leftPanel, BorderLayout.LINE_START );
+		add( titleLabel, BorderLayout.CENTER );
+		add( buttonPanel, BorderLayout.LINE_END );
+	}
+
+	protected void createButtons() {
+		iconifyButton = createButton( "TitlePane.iconifyIcon", "Iconify", e -> iconify() );
+		maximizeButton = createButton( "TitlePane.maximizeIcon", "Maximize", e -> maximize() );
+		restoreButton = createButton( "TitlePane.restoreIcon", "Restore", e -> restore() );
+		closeButton = createButton( "TitlePane.closeIcon", "Close", e -> close() );
+
+		buttonPanel = new JPanel() {
+			@Override
+			public Dimension getPreferredSize() {
+				Dimension size = super.getPreferredSize();
+				if( buttonMaximizedHeight > 0 &&
+					window instanceof Frame &&
+					(((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0 )
+				{
+					// make title pane height smaller when frame is maximized
+					size = new Dimension( size.width, Math.min( size.height, UIScale.scale( buttonMaximizedHeight ) ) );
+				}
+				return size;
+			}
+		};
+		buttonPanel.setOpaque( false );
+		buttonPanel.setLayout( new BoxLayout( buttonPanel, BoxLayout.LINE_AXIS ) );
+		if( rootPane.getWindowDecorationStyle() == JRootPane.FRAME ) {
+			// JRootPane.FRAME works only for frames (and not for dialogs)
+			// but at this time the owner window type is unknown (not yet added)
+			// so we add the iconify/maximize/restore buttons and they are hidden
+			// later in frameStateChanged(), which is invoked from addNotify()
+
+			restoreButton.setVisible( false );
+
+			buttonPanel.add( iconifyButton );
+			buttonPanel.add( maximizeButton );
+			buttonPanel.add( restoreButton );
+		}
+		buttonPanel.add( closeButton );
+	}
+
+	protected JButton createButton( String iconKey, String accessibleName, ActionListener action ) {
+		JButton button = new JButton( UIManager.getIcon( iconKey ) );
+		button.setFocusable( false );
+		button.setContentAreaFilled( false );
+		button.setBorder( BorderFactory.createEmptyBorder() );
+		button.putClientProperty( AccessibleContext.ACCESSIBLE_NAME_PROPERTY, accessibleName );
+		button.addActionListener( action );
+		return button;
+	}
+
+	protected void activeChanged( boolean active ) {
+		boolean hasEmbeddedMenuBar = rootPane.getJMenuBar() != null && isMenuBarEmbedded();
+		Color background = FlatUIUtils.nonUIResource( active ? activeBackground : inactiveBackground );
+		Color foreground = FlatUIUtils.nonUIResource( active ? activeForeground : inactiveForeground );
+		Color titleForeground = (hasEmbeddedMenuBar && active) ? FlatUIUtils.nonUIResource( embeddedForeground ) : foreground;
+
+		setBackground( background );
+		titleLabel.setForeground( titleForeground );
+		iconifyButton.setForeground( foreground );
+		maximizeButton.setForeground( foreground );
+		restoreButton.setForeground( foreground );
+		closeButton.setForeground( foreground );
+
+		titleLabel.setHorizontalAlignment( hasEmbeddedMenuBar ? SwingConstants.CENTER : SwingConstants.LEADING );
+
+		// this is necessary because hover/pressed colors are derived from background color
+		iconifyButton.setBackground( background );
+		maximizeButton.setBackground( background );
+		restoreButton.setBackground( background );
+		closeButton.setBackground( background );
+	}
+
+	protected void frameStateChanged() {
+		if( window == null || rootPane.getWindowDecorationStyle() != JRootPane.FRAME )
+			return;
+
+		if( window instanceof Frame ) {
+			Frame frame = (Frame) window;
+			boolean resizable = frame.isResizable();
+			boolean maximized = ((frame.getExtendedState() & Frame.MAXIMIZED_BOTH) != 0);
+
+			iconifyButton.setVisible( true );
+			maximizeButton.setVisible( resizable && !maximized );
+			restoreButton.setVisible( resizable && maximized );
+
+			if( maximized &&
+				rootPane.getClientProperty( "_flatlaf.maximizedBoundsUpToDate" ) == null )
+			{
+				rootPane.putClientProperty( "_flatlaf.maximizedBoundsUpToDate", null );
+
+				// In case that frame was maximized from custom code (e.g. when restoring
+				// window state on application startup), then maximized bounds is not set
+				// and the window would overlap Windows task bar.
+				// To avoid this, update maximized bounds here and if it has changed
+				// re-maximize windows so that maximized bounds are used.
+				Rectangle oldMaximizedBounds = frame.getMaximizedBounds();
+				updateMaximizedBounds();
+				Rectangle newMaximizedBounds = frame.getMaximizedBounds();
+				if( newMaximizedBounds != null && !newMaximizedBounds.equals( oldMaximizedBounds ) ) {
+					int oldExtendedState = frame.getExtendedState();
+					frame.setExtendedState( oldExtendedState & ~Frame.MAXIMIZED_BOTH );
+					frame.setExtendedState( oldExtendedState );
+				}
+			}
+		} else {
+			// hide buttons because they are only supported in frames
+			iconifyButton.setVisible( false );
+			maximizeButton.setVisible( false );
+			restoreButton.setVisible( false );
+
+			revalidate();
+			repaint();
+		}
+	}
+
+	protected void updateIcon() {
+		// get window images
+		List<Image> images = window.getIconImages();
+		if( images.isEmpty() ) {
+			// search in owners
+			for( Window owner = window.getOwner(); owner != null; owner = owner.getOwner() ) {
+				images = owner.getIconImages();
+				if( !images.isEmpty() )
+					break;
+			}
+		}
+
+		boolean hasIcon = true;
+
+		// set icon
+		if( !images.isEmpty() )
+			iconLabel.setIcon( FlatTitlePaneIcon.create( images, iconSize ) );
+		else {
+			// no icon set on window --> use default icon
+			Icon defaultIcon = UIManager.getIcon( "InternalFrame.icon" );
+			if( defaultIcon != null && (defaultIcon.getIconWidth() == 0 || defaultIcon.getIconHeight() == 0) )
+				defaultIcon = null;
+			if( defaultIcon != null ) {
+				if( defaultIcon instanceof ImageIcon )
+					defaultIcon = new ScaledImageIcon( (ImageIcon) defaultIcon, iconSize.width, iconSize.height );
+				iconLabel.setIcon( defaultIcon );
+			} else
+				hasIcon = false;
+		}
+
+		// show/hide icon
+		iconLabel.setVisible( hasIcon );
+
+		updateJBRHitTestSpotsAndTitleBarHeightLater();
+	}
+
+	@Override
+	public void addNotify() {
+		super.addNotify();
+
+		uninstallWindowListeners();
+
+		window = SwingUtilities.getWindowAncestor( this );
+		if( window != null ) {
+			frameStateChanged();
+			activeChanged( window.isActive() );
+			updateIcon();
+			titleLabel.setText( getWindowTitle() );
+			installWindowListeners();
+		}
+
+		updateJBRHitTestSpotsAndTitleBarHeightLater();
+	}
+
+	@Override
+	public void removeNotify() {
+		super.removeNotify();
+
+		uninstallWindowListeners();
+		window = null;
+	}
+
+	protected String getWindowTitle() {
+		if( window instanceof Frame )
+			return ((Frame)window).getTitle();
+		if( window instanceof Dialog )
+			return ((Dialog)window).getTitle();
+		return null;
+	}
+
+	protected void installWindowListeners() {
+		if( window == null )
+			return;
+
+		window.addPropertyChangeListener( handler );
+		window.addWindowListener( handler );
+		window.addWindowStateListener( handler );
+		window.addComponentListener( handler );
+	}
+
+	protected void uninstallWindowListeners() {
+		if( window == null )
+			return;
+
+		window.removePropertyChangeListener( handler );
+		window.removeWindowListener( handler );
+		window.removeWindowStateListener( handler );
+		window.removeComponentListener( handler );
+	}
+
+	protected boolean isMenuBarEmbedded() {
+		// not storing value of "TitlePane.menuBarEmbedded" in class to allow changing at runtime
+		return UIManager.getBoolean( "TitlePane.menuBarEmbedded" ) &&
+			FlatClientProperties.clientPropertyBoolean( rootPane, FlatClientProperties.MENU_BAR_EMBEDDED, true ) &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.MENUBAR_EMBEDDED, true );
+	}
+
+	protected Rectangle getMenuBarBounds() {
+		Insets insets = rootPane.getInsets();
+		Rectangle bounds = new Rectangle(
+			SwingUtilities.convertPoint( menuBarPlaceholder, -insets.left, -insets.top, rootPane ),
+			menuBarPlaceholder.getSize() );
+
+		// add menu bar bottom border insets to bounds so that menu bar overlaps
+		// title pane border (menu bar border is painted over title pane border)
+		Insets borderInsets = getBorder().getBorderInsets( this );
+		bounds.height += borderInsets.bottom;
+
+		return FlatUIUtils.subtractInsets( bounds, UIScale.scale( getMenuBarMargins() ) );
+	}
+
+	protected Insets getMenuBarMargins() {
+		return getComponentOrientation().isLeftToRight()
+			? menuBarMargins
+			: new Insets( menuBarMargins.top, menuBarMargins.right, menuBarMargins.bottom, menuBarMargins.left );
+	}
+
+	protected void menuBarChanged() {
+		menuBarPlaceholder.invalidate();
+
+		// update title foreground color
+		EventQueue.invokeLater( () -> {
+			activeChanged( window == null || window.isActive() );
+		} );
+	}
+
+	protected void menuBarLayouted() {
+		updateJBRHitTestSpotsAndTitleBarHeightLater();
+	}
+
+/*debug
+	@Override
+	public void paint( Graphics g ) {
+		super.paint( g );
+
+		if( debugTitleBarHeight > 0 ) {
+			g.setColor( Color.green );
+			g.drawLine( 0, debugTitleBarHeight, getWidth(), debugTitleBarHeight );
+		}
+		if( debugHitTestSpots != null ) {
+			g.setColor( Color.blue );
+			for( Rectangle r : debugHitTestSpots )
+				g.drawRect( r.x, r.y, r.width, r.height );
+		}
+	}
+debug*/
+
+	@Override
+	protected void paintComponent( Graphics g ) {
+		g.setColor( getBackground() );
+		g.fillRect( 0, 0, getWidth(), getHeight() );
+	}
+
+	protected void repaintWindowBorder() {
+		int width = rootPane.getWidth();
+		int height = rootPane.getHeight();
+		Insets insets = rootPane.getInsets();
+		rootPane.repaint( 0, 0, width, insets.top ); // top
+		rootPane.repaint( 0, 0, insets.left, height ); // left
+		rootPane.repaint( 0, height - insets.bottom, width, insets.bottom ); // bottom
+		rootPane.repaint( width - insets.right, 0, insets.right, height ); // right
+	}
+
+	/**
+	 * Iconifies the window.
+	 */
+	protected void iconify() {
+		if( window instanceof Frame ) {
+			Frame frame = (Frame) window;
+			frame.setExtendedState( frame.getExtendedState() | Frame.ICONIFIED );
+		}
+	}
+
+	/**
+	 * Maximizes the window.
+	 */
+	protected void maximize() {
+		if( !(window instanceof Frame) )
+			return;
+
+		Frame frame = (Frame) window;
+
+		updateMaximizedBounds();
+
+		// let our WindowStateListener know that the maximized bounds are up-to-date
+		rootPane.putClientProperty( "_flatlaf.maximizedBoundsUpToDate", true );
+
+		// maximize window
+		frame.setExtendedState( frame.getExtendedState() | Frame.MAXIMIZED_BOTH );
+	}
+
+	protected void updateMaximizedBounds() {
+		Frame frame = (Frame) window;
+
+		// set maximized bounds to avoid that maximized window overlaps Windows task bar
+		// (if not running in JBR and if not modified from the application)
+		Rectangle oldMaximizedBounds = frame.getMaximizedBounds();
+		if( !hasJBRCustomDecoration() &&
+			(oldMaximizedBounds == null ||
+			 Objects.equals( oldMaximizedBounds, rootPane.getClientProperty( "_flatlaf.maximizedBounds" ) )) )
+		{
+			GraphicsConfiguration gc = window.getGraphicsConfiguration();
+
+			// Screen bounds, which may be smaller than physical size on Java 9+.
+			// E.g. if running a 3840x2160 screen at 200%, screenBounds.size is 1920x1080.
+			// In Java 9+, each screen can have its own scale factor.
+			//
+			// On Java 8, which does not scale, screenBounds.size of the primary screen
+			// is identical to its physical size. But when the primary screen is scaled,
+			// then screenBounds.size of secondary screens is scaled with the scale factor
+			// of the primary screen.
+			// E.g. primary 3840x2160 screen at 150%, secondary 1920x1080 screen at 100%,
+			// then screenBounds.size is 3840x2160 on primary and 2880x1560 on secondary.
+			Rectangle screenBounds = gc.getBounds();
+
+			int maximizedX = screenBounds.x;
+			int maximizedY = screenBounds.y;
+			int maximizedWidth = screenBounds.width;
+			int maximizedHeight = screenBounds.height;
+
+			if( !isMaximizedBoundsFixed() ) {
+				// on Java 8 to 14, maximized x,y are 0,0 based on all screens in a multi-screen environment
+				maximizedX = 0;
+				maximizedY = 0;
+
+				// scale maximized screen size to get physical screen size for Java 9 to 14
+				AffineTransform defaultTransform = gc.getDefaultTransform();
+				maximizedWidth = (int) (maximizedWidth * defaultTransform.getScaleX());
+				maximizedHeight = (int) (maximizedHeight * defaultTransform.getScaleY());
+			}
+
+			// screen insets are in physical size, except for Java 15+
+			// (see https://bugs.openjdk.java.net/browse/JDK-8243925)
+			// and except for Java 8 on secondary screens where primary screen is scaled
+			Insets screenInsets = window.getToolkit().getScreenInsets( gc );
+
+			// maximized bounds are required in physical size, except for Java 15+
+			// (see https://bugs.openjdk.java.net/browse/JDK-8231564 and
+			//      https://bugs.openjdk.java.net/browse/JDK-8176359)
+			// and except for Java 8 on secondary screens where primary screen is scaled
+			Rectangle newMaximizedBounds = new Rectangle(
+				maximizedX + screenInsets.left,
+				maximizedY + screenInsets.top,
+				maximizedWidth - screenInsets.left - screenInsets.right,
+				maximizedHeight - screenInsets.top - screenInsets.bottom );
+
+			if( !Objects.equals( oldMaximizedBounds, newMaximizedBounds ) ) {
+				// change maximized bounds
+				frame.setMaximizedBounds( newMaximizedBounds );
+
+				// remember maximized bounds in client property to be able to detect
+				// whether maximized bounds are modified from the application
+				rootPane.putClientProperty( "_flatlaf.maximizedBounds", newMaximizedBounds );
+			}
+		}
+	}
+
+	/**
+	 * Frame.setMaximizedBounds() behaves different on some Java versions after issues
+	 *   https://bugs.openjdk.java.net/browse/JDK-8231564 and
+	 *   https://bugs.openjdk.java.net/browse/JDK-8176359
+	 *   (see also https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8176359)
+	 * were fixed in Java 15 and backported to 11.0.8 and 13.0.4.
+	 */
+	private boolean isMaximizedBoundsFixed() {
+		return SystemInfo.isJava_15_orLater ||
+			(SystemInfo.javaVersion >= SystemInfo.toVersion( 11, 0, 8, 0 ) &&
+			 SystemInfo.javaVersion <  SystemInfo.toVersion( 12, 0, 0, 0 )) ||
+			(SystemInfo.javaVersion >= SystemInfo.toVersion( 13, 0, 4, 0 ) &&
+			 SystemInfo.javaVersion <  SystemInfo.toVersion( 14, 0, 0, 0 ));
+	}
+
+	/**
+	 * Restores the window size.
+	 */
+	protected void restore() {
+		if( window instanceof Frame ) {
+			Frame frame = (Frame) window;
+			int state = frame.getExtendedState();
+			frame.setExtendedState( ((state & Frame.ICONIFIED) != 0)
+				? (state & ~Frame.ICONIFIED)
+				: (state & ~Frame.MAXIMIZED_BOTH) );
+		}
+	}
+
+	/**
+	 * Closes the window.
+	 */
+	protected void close() {
+		if( window != null )
+			window.dispatchEvent( new WindowEvent( window, WindowEvent.WINDOW_CLOSING ) );
+	}
+
+	protected boolean hasJBRCustomDecoration() {
+		return FlatRootPaneUI.canUseJBRCustomDecorations &&
+			window != null &&
+			JBRCustomDecorations.hasCustomDecoration( window );
+	}
+
+	protected void updateJBRHitTestSpotsAndTitleBarHeightLater() {
+		EventQueue.invokeLater( () -> {
+			updateJBRHitTestSpotsAndTitleBarHeight();
+		} );
+	}
+
+	protected void updateJBRHitTestSpotsAndTitleBarHeight() {
+		if( !isDisplayable() )
+			return;
+
+		if( !hasJBRCustomDecoration() )
+			return;
+
+		List<Rectangle> hitTestSpots = new ArrayList<>();
+		if( iconLabel.isVisible() )
+			addJBRHitTestSpot( iconLabel, false, hitTestSpots );
+		addJBRHitTestSpot( buttonPanel, false, hitTestSpots );
+		addJBRHitTestSpot( menuBarPlaceholder, true, hitTestSpots );
+
+		int titleBarHeight = getHeight();
+		// slightly reduce height so that component receives mouseExit events
+		if( titleBarHeight > 0 )
+			titleBarHeight--;
+
+		JBRCustomDecorations.setHitTestSpotsAndTitleBarHeight( window, hitTestSpots, titleBarHeight );
+
+/*debug
+		debugHitTestSpots = hitTestSpots;
+		debugTitleBarHeight = titleBarHeight;
+		repaint();
+debug*/
+	}
+
+	protected void addJBRHitTestSpot( JComponent c, boolean subtractMenuBarMargins, List<Rectangle> hitTestSpots ) {
+		Dimension size = c.getSize();
+		if( size.width <= 0 || size.height <= 0 )
+			return;
+
+		Point location = SwingUtilities.convertPoint( c, 0, 0, window );
+		Rectangle r = new Rectangle( location, size );
+		if( subtractMenuBarMargins )
+			r = FlatUIUtils.subtractInsets( r, UIScale.scale( getMenuBarMargins() ) );
+		// slightly increase rectangle so that component receives mouseExit events
+		r.grow( 2, 2 );
+		hitTestSpots.add( r );
+	}
+
+/*debug
+	private List<Rectangle> debugHitTestSpots;
+	private int debugTitleBarHeight;
+debug*/
+
+	//---- class TitlePaneBorder ----------------------------------------------
+
+	protected class FlatTitlePaneBorder
+		extends AbstractBorder
+	{
+		@Override
+		public Insets getBorderInsets( Component c, Insets insets ) {
+			super.getBorderInsets( c, insets );
+
+			// if menu bar is embedded, add bottom insets of menu bar border
+			Border menuBarBorder = getMenuBarBorder();
+			if( menuBarBorder != null ) {
+				Insets menuBarInsets = menuBarBorder.getBorderInsets( c );
+				insets.bottom += menuBarInsets.bottom;
+			}
+
+			if( hasJBRCustomDecoration() )
+				insets = FlatUIUtils.addInsets( insets, JBRWindowTopBorder.getInstance().getBorderInsets() );
+
+			return insets;
+		}
+
+		@Override
+		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+			// if menu bar is embedded, paint menu bar border
+			Border menuBarBorder = getMenuBarBorder();
+			if( menuBarBorder != null )
+				menuBarBorder.paintBorder( c, g, x, y, width, height );
+
+			if( hasJBRCustomDecoration() )
+				JBRWindowTopBorder.getInstance().paintBorder( c, g, x, y, width, height );
+		}
+
+		protected Border getMenuBarBorder() {
+			JMenuBar menuBar = rootPane.getJMenuBar();
+			return (menuBar != null && isMenuBarEmbedded()) ? menuBar.getBorder() : null;
+		}
+	}
+
+	//---- class Handler ------------------------------------------------------
+
+	protected class Handler
+		extends WindowAdapter
+		implements PropertyChangeListener, MouseListener, MouseMotionListener, ComponentListener
+	{
+		//---- interface PropertyChangeListener ----
+
+		@Override
+		public void propertyChange( PropertyChangeEvent e ) {
+			switch( e.getPropertyName() ) {
+				case "title":
+					titleLabel.setText( getWindowTitle() );
+					break;
+
+				case "resizable":
+					if( window instanceof Frame )
+						frameStateChanged();
+					break;
+
+				case "iconImage":
+					updateIcon();
+					break;
+
+				case "componentOrientation":
+					updateJBRHitTestSpotsAndTitleBarHeightLater();
+					break;
+			}
+		}
+
+		//---- interface WindowListener ----
+
+		@Override
+		public void windowActivated( WindowEvent e ) {
+			activeChanged( true );
+			updateJBRHitTestSpotsAndTitleBarHeight();
+
+			if( hasJBRCustomDecoration() )
+				JBRWindowTopBorder.getInstance().repaintBorder( FlatTitlePane.this );
+
+			repaintWindowBorder();
+		}
+
+		@Override
+		public void windowDeactivated( WindowEvent e ) {
+			activeChanged( false );
+			updateJBRHitTestSpotsAndTitleBarHeight();
+
+			if( hasJBRCustomDecoration() )
+				JBRWindowTopBorder.getInstance().repaintBorder( FlatTitlePane.this );
+
+			repaintWindowBorder();
+		}
+
+		@Override
+		public void windowStateChanged( WindowEvent e ) {
+			frameStateChanged();
+			updateJBRHitTestSpotsAndTitleBarHeight();
+		}
+
+		//---- interface MouseListener ----
+
+		private Point dragOffset;
+
+		@Override
+		public void mouseClicked( MouseEvent e ) {
+			if( e.getClickCount() == 2 && SwingUtilities.isLeftMouseButton( e ) ) {
+				if( e.getSource() == iconLabel ) {
+					// double-click on icon closes window
+					close();
+				} else if( !hasJBRCustomDecoration() &&
+					window instanceof Frame &&
+					((Frame)window).isResizable() )
+				{
+					// maximize/restore on double-click
+					Frame frame = (Frame) window;
+					if( (frame.getExtendedState() & Frame.MAXIMIZED_BOTH) != 0 )
+						restore();
+					else
+						maximize();
+				}
+			}
+		}
+
+		@Override
+		public void mousePressed( MouseEvent e ) {
+			if( window == null )
+				return; // should newer occur
+
+			dragOffset = SwingUtilities.convertPoint( FlatTitlePane.this, e.getPoint(), window );
+		}
+
+		@Override public void mouseReleased( MouseEvent e ) {}
+		@Override public void mouseEntered( MouseEvent e ) {}
+		@Override public void mouseExited( MouseEvent e ) {}
+
+		//---- interface MouseMotionListener ----
+
+		@Override
+		public void mouseDragged( MouseEvent e ) {
+			if( window == null )
+				return; // should newer occur
+
+			if( hasJBRCustomDecoration() )
+				return; // do nothing if running in JBR
+
+			// restore window if it is maximized
+			if( window instanceof Frame ) {
+				Frame frame = (Frame) window;
+				int state = frame.getExtendedState();
+				if( (state & Frame.MAXIMIZED_BOTH) != 0 ) {
+					int maximizedWidth = window.getWidth();
+
+					// restore window size, which also moves window to pre-maximized location
+					frame.setExtendedState( state & ~Frame.MAXIMIZED_BOTH );
+
+					// fix drag offset to ensure that window remains under mouse position
+					// for the case that dragging starts in the right area of the maximized window
+					int restoredWidth = window.getWidth();
+					int center = restoredWidth / 2;
+					if( dragOffset.x > center ) {
+						// this is same/similar to what Windows 10 does
+						if( dragOffset.x > maximizedWidth - center )
+							dragOffset.x = restoredWidth - (maximizedWidth - dragOffset.x);
+						else
+							dragOffset.x = center;
+					}
+				}
+			}
+
+			// compute new window location
+			int newX = e.getXOnScreen() - dragOffset.x;
+			int newY = e.getYOnScreen() - dragOffset.y;
+
+			if( newX == window.getX() && newY == window.getY() )
+				return;
+
+			// move window
+			window.setLocation( newX, newY );
+		}
+
+		@Override public void mouseMoved( MouseEvent e ) {}
+
+		//---- interface ComponentListener ----
+
+		@Override
+		public void componentResized( ComponentEvent e ) {
+			updateJBRHitTestSpotsAndTitleBarHeightLater();
+		}
+
+		@Override
+		public void componentShown( ComponentEvent e ) {
+			// necessary for the case that the frame is maximized before it is shown
+			frameStateChanged();
+		}
+
+		@Override public void componentMoved( ComponentEvent e ) {}
+		@Override public void componentHidden( ComponentEvent e ) {}
+	}
+}

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

@@ -0,0 +1,70 @@
+/*
+ * 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.Dimension;
+import java.awt.Image;
+import java.util.ArrayList;
+import java.util.List;
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+import com.formdev.flatlaf.util.MultiResolutionImageSupport;
+import com.formdev.flatlaf.util.ScaledImageIcon;
+
+/**
+ * @author Karl Tauber
+ */
+public class FlatTitlePaneIcon
+	extends ScaledImageIcon
+{
+	public static Icon create( List<Image> images, Dimension size ) {
+		// collect all images including multi-resolution variants
+		List<Image> allImages = new ArrayList<>();
+		for( Image image : images ) {
+			if( MultiResolutionImageSupport.isMultiResolutionImage( image ) )
+				allImages.addAll( MultiResolutionImageSupport.getResolutionVariants( image ) );
+			else
+				allImages.add( image );
+		}
+
+		// sort images by size
+		allImages.sort( (image1, image2) -> {
+			return image1.getWidth( null ) - image2.getWidth( null );
+		} );
+
+		// create icon
+		return new FlatTitlePaneIcon( allImages, size );
+	}
+
+	private final List<Image> images;
+
+	private FlatTitlePaneIcon( List<Image> images, Dimension size ) {
+		super( new ImageIcon( images.get( 0 ) ), size.width, size.height );
+		this.images = images;
+	}
+
+	@Override
+	protected Image getResolutionVariant( int destImageWidth, int destImageHeight ) {
+		for( Image image : images ) {
+			if( destImageWidth <= image.getWidth( null ) &&
+				destImageHeight <= image.getHeight( null ) )
+			  return image;
+		}
+
+		return images.get( images.size() - 1 );
+	}
+}

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

@@ -22,7 +22,6 @@ import java.awt.Component;
 import java.awt.Graphics;
 import java.beans.PropertyChangeEvent;
 import javax.swing.AbstractButton;
-import javax.swing.ButtonModel;
 import javax.swing.JComponent;
 import javax.swing.JToggleButton;
 import javax.swing.UIManager;
@@ -50,17 +49,17 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault ToggleButton.startBackground				Color	optional; if set, a gradient paint is used and ToggleButton.background is ignored
  * @uiDefault ToggleButton.endBackground				Color	optional; if set, a gradient paint is used
  * @uiDefault ToggleButton.pressedBackground			Color
- * @uiDefault ToggleButton.disabledText					Color
- * @uiDefault ToggleButton.toolbar.hoverBackground		Color
- * @uiDefault ToggleButton.toolbar.pressedBackground	Color
- *
- * <!-- FlatToggleButtonUI -->
- *
  * @uiDefault ToggleButton.selectedBackground			Color
  * @uiDefault ToggleButton.selectedForeground			Color
+ * @uiDefault ToggleButton.disabledBackground			Color	optional
+ * @uiDefault ToggleButton.disabledText					Color
  * @uiDefault ToggleButton.disabledSelectedBackground	Color
+ * @uiDefault ToggleButton.toolbar.hoverBackground		Color
+ * @uiDefault ToggleButton.toolbar.pressedBackground	Color
  * @uiDefault ToggleButton.toolbar.selectedBackground	Color
  *
+ * <!-- FlatToggleButtonUI -->
+ *
  * @uiDefault ToggleButton.tab.underlineHeight			int
  * @uiDefault ToggleButton.tab.underlineColor			Color
  * @uiDefault ToggleButton.tab.disabledUnderlineColor	Color
@@ -74,12 +73,6 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatToggleButtonUI
 	extends FlatButtonUI
 {
-	protected Color selectedBackground;
-	protected Color selectedForeground;
-	protected Color disabledSelectedBackground;
-
-	protected Color toolbarSelectedBackground;
-
 	protected int tabUnderlineHeight;
 	protected Color tabUnderlineColor;
 	protected Color tabDisabledUnderlineColor;
@@ -107,12 +100,6 @@ public class FlatToggleButtonUI
 		super.installDefaults( b );
 
 		if( !defaults_initialized ) {
-			selectedBackground = UIManager.getColor( "ToggleButton.selectedBackground" );
-			selectedForeground = UIManager.getColor( "ToggleButton.selectedForeground" );
-			disabledSelectedBackground = UIManager.getColor( "ToggleButton.disabledSelectedBackground" );
-
-			toolbarSelectedBackground = UIManager.getColor( "ToggleButton.toolbar.selectedBackground" );
-
 			tabUnderlineHeight = UIManager.getInt( "ToggleButton.tab.underlineHeight" );
 			tabUnderlineColor = UIManager.getColor( "ToggleButton.tab.underlineColor" );
 			tabDisabledUnderlineColor = UIManager.getColor( "ToggleButton.tab.disabledUnderlineColor" );
@@ -138,7 +125,7 @@ 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();
 				}
 
@@ -184,37 +171,4 @@ public class FlatToggleButtonUI
 		} else
 			super.paintBackground( g, c );
 	}
-
-	@Override
-	protected Color getBackground( JComponent c ) {
-		ButtonModel model = ((AbstractButton)c).getModel();
-
-		if( model.isSelected() ) {
-			// in toolbar use same colors for disabled and enabled because
-			// we assume that toolbar icon is shown disabled
-			boolean toolBarButton = isToolBarButton( c );
-			return buttonStateColor( c,
-				toolBarButton ? toolbarSelectedBackground : selectedBackground,
-				toolBarButton ? toolbarSelectedBackground : disabledSelectedBackground,
-				null, null,
-				toolBarButton ? toolbarPressedBackground : pressedBackground );
-		}
-
-		return super.getBackground( c );
-	}
-
-	@Override
-	protected Color getForeground( JComponent c ) {
-		ButtonModel model = ((AbstractButton)c).getModel();
-
-		if( model.isSelected() && !isToolBarButton( c ) )
-			return selectedForeground;
-
-		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

@@ -29,6 +29,7 @@ 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.HiDPIUtils;
 import com.formdev.flatlaf.util.StringUtils;
 
 /**
@@ -93,6 +94,11 @@ public class FlatToolTipUI
 
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
+		// do not show tool tip if text is empty
+		String text = ((JToolTip)c).getTipText();
+		if( text == null || text.isEmpty() )
+			return new Dimension();
+
 		if( isMultiLine( c ) ) {
 			FontMetrics fm = c.getFontMetrics( c.getFont() );
 			Insets insets = c.getInsets();
@@ -103,7 +109,7 @@ 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 );
 	}
@@ -119,8 +125,8 @@ public class FlatToolTipUI
 
 			List<String> lines = StringUtils.split( ((JToolTip)c).getTipText(), '\n' );
 
-			int x = insets.left;
+			int x = insets.left + 3;
-			int x2 = c.getWidth() - insets.right;
+			int x2 = c.getWidth() - insets.right - 3;
 			int y = insets.top - fm.getDescent();
 			int lineHeight = fm.getHeight();
 			JComponent comp = ((JToolTip)c).getComponent();
@@ -130,7 +136,7 @@ public class FlatToolTipUI
 				FlatUIUtils.drawString( c, g, line, leftToRight ? x : x2 - SwingUtilities.computeStringWidth( fm, line ), y );
 			}
 		} else
-			super.paint( g, c );
+			super.paint( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ), c );
 	}
 
 	private boolean isMultiLine( JComponent c ) {

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

@@ -25,6 +25,7 @@ import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import javax.swing.CellRendererPane;
 import javax.swing.JComponent;
 import javax.swing.JTree;
 import javax.swing.LookAndFeel;
@@ -75,6 +76,11 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Tree.dropCellBackground				Color
  * @uiDefault Tree.dropCellForeground				Color
  *
+ * <!-- DefaultTreeCellEditor -->
+ *
+ * @uiDefault Tree.editorBorder						Border
+ * @uiDefault Tree.editorBorderSelectionColor		Color
+ *
  * <!-- FlatTreeUI -->
  *
  * @uiDefault Tree.border							Border
@@ -226,6 +232,11 @@ public class FlatTreeUI
 		boolean isSelected = tree.isRowSelected( row );
 		boolean isDropRow = isDropRow( row );
 
+		// if tree is used as cell renderer in another component (e.g. in Rhino JavaScript debugger),
+		// check whether that component is focused to get correct selection colors
+		if( !hasFocus && isSelected && tree.getParent() instanceof CellRendererPane )
+			hasFocus = FlatUIUtils.isPermanentFocusOwner( tree.getParent().getParent() );
+
 		// wide selection background
 		if( wideSelection && (isSelected || isDropRow) ) {
 			// fill background

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

@@ -37,14 +37,17 @@ import java.awt.geom.Rectangle2D;
 import java.awt.geom.RoundRectangle2D;
 import java.util.function.Consumer;
 import javax.swing.JComponent;
+import javax.swing.JTable;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingUtilities;
 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;
 
 /**
@@ -134,12 +137,80 @@ public class FlatUIUtils
 		return FlatClientProperties.clientPropertyInt( c, FlatClientProperties.MINIMUM_HEIGHT, minimumHeight );
 	}
 
-	public static boolean isTableCellEditor( Component c ) {
+	public static boolean isCellEditor( Component c ) {
+		// check whether used in cell editor (check 3 levels up)
+		Component c2 = c;
+		for( int i = 0; i <= 2 && c2 != null; i++ ) {
+			Container parent = c2.getParent();
+			if( parent instanceof JTable && ((JTable)parent).getEditorComponent() == c2 )
+				return true;
+
+			c2 = parent;
+		}
+
+		// check whether used as cell editor
+		//   Table.editor is set in JTable.GenericEditor constructor
+		//   Tree.cellEditor is set in sun.swing.FilePane.editFileName()
+		String name = c.getName();
+		if( "Table.editor".equals( name ) || "Tree.cellEditor".equals( name ) )
+			return true;
+
+		// for using combo box as cell editor in table
+		//   JComboBox.isTableCellEditor is set in javax.swing.DefaultCellEditor(JComboBox) constructor
 		return c instanceof JComponent && Boolean.TRUE.equals( ((JComponent)c).getClientProperty( "JComboBox.isTableCellEditor" ) );
 	}
 
+	/**
+	 * Returns whether the given component is the permanent focus owner and
+	 * is in the active window. Used to paint focus indicators.
+	 */
 	public static boolean isPermanentFocusOwner( Component c ) {
-		return (KeyboardFocusManager.getCurrentKeyboardFocusManager().getPermanentFocusOwner() == c);
+		KeyboardFocusManager keyboardFocusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
+		return keyboardFocusManager.getPermanentFocusOwner() == c &&
+			keyboardFocusManager.getActiveWindow() == SwingUtilities.windowForComponent( c );
+	}
+
+	public static Boolean isRoundRect( Component c ) {
+		return (c instanceof JComponent)
+			? FlatClientProperties.clientPropertyBooleanStrict(
+				(JComponent) c, FlatClientProperties.COMPONENT_ROUND_RECT, null )
+			: null;
+	}
+
+	/**
+	 * 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;
+		}
 	}
 
 	/**
@@ -151,17 +222,17 @@ public class FlatUIUtils
 			MAC_USE_QUARTZ ? RenderingHints.VALUE_STROKE_PURE : RenderingHints.VALUE_STROKE_NORMALIZE );
 	}
 
-	public static void setColor( Graphics g, Color color, Color baseColor ) {
+	public static Color deriveColor( Color color, Color baseColor ) {
-		if( color instanceof DerivedColor )
+		return (color instanceof DerivedColor)
-			color = ((DerivedColor)color).derive( baseColor );
+			? ((DerivedColor)color).derive( baseColor )
-		g.setColor( color );
+			: color;
 	}
 
 	/**
 	 * Paints an outer border, which is usually a focus border.
 	 * <p>
 	 * The outside bounds of the painted border are {@code x,y,width,height}.
-	 * The line width of the painted border is {@code focusWidth + lineWidth}.
+	 * The line thickness of the painted border is {@code focusWidth + lineWidth}.
 	 * The given arc diameter refers to the inner rectangle ({@code x,y,width,height} minus {@code focusWidth}).
 	 *
 	 * @see #paintComponentBorder
@@ -170,6 +241,9 @@ public class FlatUIUtils
 	public static void paintComponentOuterBorder( Graphics2D g, int x, int y, int width, int height,
 		float focusWidth, float lineWidth, float arc )
 	{
+		if( focusWidth + lineWidth == 0 )
+			return; // nothing to paint
+
 		double systemScaleFactor = UIScale.getSystemScaleFactor( g );
 		if( systemScaleFactor != 1 && systemScaleFactor != 2 ) {
 			// paint at scale 1x to avoid clipping on right and bottom edges at 125%, 150% or 175%
@@ -195,14 +269,9 @@ 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( createComponentRectangle( x, y, width, height, outerArc ), false );
-		path.append( new RoundRectangle2D.Float( x + ow, y + ow, width - (ow * 2), height - (ow * 2), innerArc, innerArc ), false );
+		path.append( createComponentRectangle( x + ow, y + ow, width - (ow * 2), height - (ow * 2), innerArc ), false );
 		g.fill( path );
 	}
 
@@ -211,6 +280,7 @@ public class FlatUIUtils
 	 * <p>
 	 * The outside bounds of the painted border are
 	 * {@code x + focusWidth, y + focusWidth, width - (focusWidth * 2), height - (focusWidth * 2)}.
+	 * The line thickness of the painted border is {@code lineWidth}.
 	 * The given arc diameter refers to the painted rectangle (and not to {@code x,y,width,height}).
 	 *
 	 * @see #paintComponentOuterBorder
@@ -219,6 +289,9 @@ public class FlatUIUtils
 	public static void paintComponentBorder( Graphics2D g, int x, int y, int width, int height,
 		float focusWidth, float lineWidth, float arc )
 	{
+		if( lineWidth == 0 )
+			return; // nothing to paint
+
 		double systemScaleFactor = UIScale.getSystemScaleFactor( g );
 		if( systemScaleFactor != 1 && systemScaleFactor != 2 ) {
 			// paint at scale 1x to avoid clipping on right and bottom edges at 125%, 150% or 175%
@@ -236,19 +309,16 @@ 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 )
+		Shape r1 = createComponentRectangle( x1, y1, width1, height1, arc );
-			arc = 0;
+		Shape r2 = createComponentRectangle(
-		if( arc2 < 0 )
+			x1 + lineWidth, y1 + lineWidth,
-			arc2 = 0;
+			width1 - lineWidth * 2, height1 - lineWidth * 2, arc2 );
-
-		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 );
 
 		Path2D border = new Path2D.Float( Path2D.WIND_EVEN_ODD );
 		border.append( r1, false );
@@ -286,12 +356,21 @@ public class FlatUIUtils
 	private static void paintComponentBackgroundImpl( Graphics2D g, int x, int y, int width, int height,
 		float focusWidth, float arc )
 	{
-		if( arc < 0 )
+		g.fill( createComponentRectangle(
-			arc = 0;
-
-		g.fill( new RoundRectangle2D.Float(
 			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 );
 	}
 
 	/**
@@ -360,14 +439,12 @@ public class FlatUIUtils
 		if( arcTopLeft <= 0 && arcTopRight <= 0 && arcBottomLeft <= 0 && arcBottomRight <= 0 )
 			return new Rectangle2D.Float( x, y, width, height );
 
-		if( arcTopLeft < 0 )
+		// limit arcs to min(width,height)
-			arcTopLeft = 0;
+		float maxArc = Math.min( width, height ) / 2;
-		if( arcTopRight < 0 )
+		arcTopLeft = (arcTopLeft > 0) ? Math.min( arcTopLeft, maxArc ) : 0;
-			arcTopRight = 0;
+		arcTopRight = (arcTopRight > 0) ? Math.min( arcTopRight, maxArc ) : 0;
-		if( arcBottomLeft < 0 )
+		arcBottomLeft = (arcBottomLeft > 0) ? Math.min( arcBottomLeft, maxArc ) : 0;
-			arcBottomLeft = 0;
+		arcBottomRight = (arcBottomRight > 0) ? Math.min( arcBottomRight, maxArc ) : 0;
-		if( arcBottomRight < 0 )
-			arcBottomRight = 0;
 
 		float x2 = x + width;
 		float y2 = y + height;
@@ -407,23 +484,24 @@ public class FlatUIUtils
 	}
 
 	/**
-	 * Draws the given string at the specified location using text properties
+	 * Draws the given string at the specified location.
-	 * and anti-aliasing hints from the provided component.
+	 * The provided component is used to query text properties and anti-aliasing hints.
-	 *
+	 * <p>
-	 * Use this method instead of Graphics.drawString() for correct anti-aliasing.
+	 * Use this method instead of {@link Graphics#drawString(String, int, int)} for correct anti-aliasing.
-	 *
+	 * <p>
-	 * Replacement for SwingUtilities2.drawString()
+	 * Replacement for {@code SwingUtilities2.drawString()}.
+	 * Uses {@link HiDPIUtils#drawStringWithYCorrection(JComponent, Graphics2D, String, int, int)}.
 	 */
 	public static void drawString( JComponent c, Graphics g, String text, int x, int y ) {
-		JavaCompatibility.drawStringUnderlineCharAt( c, g, text, -1, x, y );
+		HiDPIUtils.drawStringWithYCorrection( c, (Graphics2D) g, text, x, y );
 	}
 
 	/**
-	 * Draws the given string at the specified location underlining the specified
+	 * Draws the given string at the specified location underlining the specified character.
-	 * character. The provided component is used to query text properties and
+	 * The provided component is used to query text properties and anti-aliasing hints.
-	 * anti-aliasing hints.
+	 * <p>
-	 *
+	 * Replacement for {@code SwingUtilities2.drawStringUnderlineCharAt()}.
-	 * Replacement for SwingUtilities2.drawStringUnderlineCharAt()
+	 * Uses {@link HiDPIUtils#drawStringUnderlineCharAtWithYCorrection(JComponent, Graphics2D, String, int, int, int)}.
 	 */
 	public static void drawStringUnderlineCharAt( JComponent c, Graphics g,
 		String text, int underlinedIndex, int x, int y )
@@ -445,7 +523,7 @@ public class FlatUIUtils
 			};
 		}
 
-		JavaCompatibility.drawStringUnderlineCharAt( c, g, text, underlinedIndex, x, y );
+		HiDPIUtils.drawStringUnderlineCharAtWithYCorrection( c, (Graphics2D) g, text, underlinedIndex, x, y );
 	}
 
 	public static boolean hasOpaqueBeenExplicitlySet( JComponent c ) {

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

@@ -0,0 +1,573 @@
+/*
+ * 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 java.awt.Cursor.*;
+import static javax.swing.SwingConstants.*;
+import java.awt.Container;
+import java.awt.Dialog;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Insets;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowStateListener;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.util.function.Supplier;
+import javax.swing.DesktopManager;
+import javax.swing.JComponent;
+import javax.swing.JInternalFrame;
+import javax.swing.JLayeredPane;
+import javax.swing.JRootPane;
+import javax.swing.UIManager;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * Resizes frames, dialogs or internal frames.
+ * <p>
+ * Could also be used to implement resize support for any Swing component
+ * by creating a new subclass.
+ *
+ * @author Karl Tauber
+ */
+public abstract class FlatWindowResizer
+	implements PropertyChangeListener, ComponentListener
+{
+	protected final static Integer WINDOW_RESIZER_LAYER = JLayeredPane.DRAG_LAYER + 1;
+
+	protected final JComponent resizeComp;
+
+	protected final int borderDragThickness = FlatUIUtils.getUIInt( "RootPane.borderDragThickness", 5 );
+	protected final int cornerDragWidth = FlatUIUtils.getUIInt( "RootPane.cornerDragWidth", 16 );
+	protected final boolean honorFrameMinimumSizeOnResize = UIManager.getBoolean( "RootPane.honorFrameMinimumSizeOnResize" );
+	protected final boolean honorDialogMinimumSizeOnResize = UIManager.getBoolean( "RootPane.honorDialogMinimumSizeOnResize" );
+
+	protected final DragBorderComponent topDragComp;
+	protected final DragBorderComponent bottomDragComp;
+	protected final DragBorderComponent leftDragComp;
+	protected final DragBorderComponent rightDragComp;
+
+	protected FlatWindowResizer( JComponent resizeComp ) {
+		this.resizeComp = resizeComp;
+
+		topDragComp = createDragBorderComponent( NW_RESIZE_CURSOR, N_RESIZE_CURSOR, NE_RESIZE_CURSOR );
+		bottomDragComp = createDragBorderComponent( SW_RESIZE_CURSOR, S_RESIZE_CURSOR, SE_RESIZE_CURSOR );
+		leftDragComp = createDragBorderComponent( NW_RESIZE_CURSOR, W_RESIZE_CURSOR, SW_RESIZE_CURSOR );
+		rightDragComp = createDragBorderComponent( NE_RESIZE_CURSOR, E_RESIZE_CURSOR, SE_RESIZE_CURSOR );
+
+		Container cont = (resizeComp instanceof JRootPane) ? ((JRootPane)resizeComp).getLayeredPane() : resizeComp;
+		Object cons = (cont instanceof JLayeredPane) ? WINDOW_RESIZER_LAYER : null;
+		cont.add( topDragComp, cons, 0 );
+		cont.add( bottomDragComp, cons, 1 );
+		cont.add( leftDragComp, cons, 2 );
+		cont.add( rightDragComp, cons, 3 );
+
+		resizeComp.addComponentListener( this );
+		resizeComp.addPropertyChangeListener( "ancestor", this );
+
+		if( resizeComp.isDisplayable() )
+			addNotify();
+	}
+
+	protected DragBorderComponent createDragBorderComponent( int leadingResizeDir, int centerResizeDir, int trailingResizeDir ) {
+		return new DragBorderComponent( leadingResizeDir, centerResizeDir, trailingResizeDir );
+	}
+
+	public void uninstall() {
+		removeNotify();
+
+		resizeComp.removeComponentListener( this );
+		resizeComp.removePropertyChangeListener( "ancestor", this );
+
+		Container cont = topDragComp.getParent();
+		cont.remove( topDragComp );
+		cont.remove( bottomDragComp );
+		cont.remove( leftDragComp );
+		cont.remove( rightDragComp );
+	}
+
+	public void doLayout() {
+		if( !topDragComp.isVisible() )
+			return;
+
+		int x = 0;
+		int y = 0;
+		int width = resizeComp.getWidth();
+		int height = resizeComp.getHeight();
+		if( width == 0 || height == 0 )
+			return;
+
+		Insets resizeInsets = getResizeInsets();
+		int thickness = UIScale.scale( borderDragThickness );
+		int topThickness = Math.max( resizeInsets.top, thickness );
+		int bottomThickness = Math.max( resizeInsets.bottom, thickness );
+		int leftThickness = Math.max( resizeInsets.left, thickness );
+		int rightThickness = Math.max( resizeInsets.right, thickness );
+		int y2 = y + topThickness;
+		int height2 = height - topThickness - bottomThickness;
+
+		// set bounds of drag components
+		topDragComp.setBounds( x, y, width, topThickness );
+		bottomDragComp.setBounds( x, y + height - bottomThickness, width, bottomThickness );
+		leftDragComp.setBounds( x, y2, leftThickness, height2 );
+		rightDragComp.setBounds( x + width - rightThickness, y2, rightThickness, height2 );
+
+		// set corner drag widths
+		int cornerDelta = UIScale.scale( cornerDragWidth - borderDragThickness );
+		topDragComp.setCornerDragWidths( leftThickness + cornerDelta, rightThickness + cornerDelta );
+		bottomDragComp.setCornerDragWidths( leftThickness + cornerDelta, rightThickness + cornerDelta );
+		leftDragComp.setCornerDragWidths( cornerDelta, cornerDelta );
+		rightDragComp.setCornerDragWidths( cornerDelta, cornerDelta );
+	}
+
+	protected Insets getResizeInsets() {
+		return new Insets( 0, 0, 0, 0 );
+	}
+
+	protected void addNotify() {
+		updateVisibility();
+	}
+
+	protected void removeNotify() {
+		updateVisibility();
+	}
+
+	protected void updateVisibility() {
+		boolean visible = isWindowResizable();
+		if( visible == topDragComp.isVisible() )
+			return;
+
+		topDragComp.setVisible( visible );
+		bottomDragComp.setVisible( visible );
+		leftDragComp.setVisible( visible );
+
+		// The east component is not hidden, instead its bounds are set to 0,0,1,1 and
+		// it is disabled. This is necessary so that DragBorderComponent.paintComponent() is invoked.
+		rightDragComp.setEnabled( visible );
+		if( visible ) {
+			rightDragComp.setVisible( true ); // necessary because it is initially invisible
+			doLayout();
+		} else
+			rightDragComp.setBounds( 0, 0, 1, 1 );
+	}
+
+	boolean isDialog() {
+		return false;
+	}
+
+	protected abstract boolean isWindowResizable();
+	protected abstract Rectangle getWindowBounds();
+	protected abstract void setWindowBounds( Rectangle r );
+	protected abstract boolean honorMinimumSizeOnResize();
+	protected abstract Dimension getWindowMinimumSize();
+
+	protected void beginResizing( int direction ) {}
+	protected void endResizing() {}
+
+	//---- interface PropertyChangeListener ----
+
+	@Override
+	public void propertyChange( PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case "ancestor":
+				if( e.getNewValue() != null )
+					addNotify();
+				else
+					removeNotify();
+				break;
+
+			case "resizable":
+				updateVisibility();
+				break;
+		}
+	}
+
+	//---- interface ComponentListener ----
+
+	@Override
+	public void componentResized( ComponentEvent e ) {
+		doLayout();
+	}
+
+	@Override public void componentMoved( ComponentEvent e ) {}
+	@Override public void componentShown( ComponentEvent e ) {}
+	@Override public void componentHidden( ComponentEvent e ) {}
+
+	//---- class WindowResizer ------------------------------------------------
+
+	/**
+	 * Resizes frames and dialogs.
+	 */
+	public static class WindowResizer
+		extends FlatWindowResizer
+		implements WindowStateListener
+	{
+		protected Window window;
+
+		public WindowResizer( JRootPane rootPane ) {
+			super( rootPane );
+		}
+
+		@Override
+		protected void addNotify() {
+			Container parent = resizeComp.getParent();
+			window = (parent instanceof Window) ? (Window) parent : null;
+			if( window instanceof Frame ) {
+				window.addPropertyChangeListener( "resizable", this );
+				window.addWindowStateListener( this );
+			}
+
+			super.addNotify();
+		}
+
+		@Override
+		protected void removeNotify() {
+			if( window instanceof Frame ) {
+				window.removePropertyChangeListener( "resizable", this );
+				window.removeWindowStateListener( this );
+			}
+			window = null;
+
+			super.removeNotify();
+		}
+
+		@Override
+		protected boolean isWindowResizable() {
+			if( window instanceof Frame )
+				return ((Frame)window).isResizable() && (((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) == 0;
+			if( window instanceof Dialog )
+				return ((Dialog)window).isResizable();
+			return false;
+		}
+
+		@Override
+		protected Rectangle getWindowBounds() {
+			return window.getBounds();
+		}
+
+		@Override
+		protected void setWindowBounds( Rectangle r ) {
+			window.setBounds( r );
+
+			// immediately layout drag border components
+			doLayout();
+
+			if( Toolkit.getDefaultToolkit().isDynamicLayoutActive() ) {
+				window.validate();
+				resizeComp.repaint();
+			}
+		}
+
+		@Override
+		protected boolean honorMinimumSizeOnResize() {
+			return
+				(honorFrameMinimumSizeOnResize && window instanceof Frame) ||
+				(honorDialogMinimumSizeOnResize && window instanceof Dialog);
+		}
+
+		@Override
+		protected Dimension getWindowMinimumSize() {
+			return window.getMinimumSize();
+		}
+
+		@Override
+		boolean isDialog() {
+			return window instanceof Dialog;
+		}
+
+		@Override
+		public void windowStateChanged( WindowEvent e ) {
+			updateVisibility();
+		}
+	}
+
+	//---- class InternalFrameResizer -----------------------------------------
+
+	/**
+	 * Resizes internal frames.
+	 */
+	public static class InternalFrameResizer
+		extends FlatWindowResizer
+	{
+		protected final Supplier<DesktopManager> desktopManager;
+
+		public InternalFrameResizer( JInternalFrame frame, Supplier<DesktopManager> desktopManager ) {
+			super( frame );
+			this.desktopManager = desktopManager;
+
+			frame.addPropertyChangeListener( "resizable", this );
+		}
+
+		@Override
+		public void uninstall() {
+			getFrame().removePropertyChangeListener( "resizable", this );
+
+			super.uninstall();
+		}
+
+		private JInternalFrame getFrame() {
+			return (JInternalFrame) resizeComp;
+		}
+
+		@Override
+		protected Insets getResizeInsets() {
+			return getFrame().getInsets();
+		}
+
+		@Override
+		protected boolean isWindowResizable() {
+			return getFrame().isResizable();
+		}
+
+		@Override
+		protected Rectangle getWindowBounds() {
+			return getFrame().getBounds();
+		}
+
+		@Override
+		protected void setWindowBounds( Rectangle r ) {
+			desktopManager.get().resizeFrame( getFrame(), r.x, r.y, r.width, r.height );
+		}
+
+		@Override
+		protected boolean honorMinimumSizeOnResize() {
+			return true;
+		}
+
+		@Override
+		protected Dimension getWindowMinimumSize() {
+			return getFrame().getMinimumSize();
+		}
+
+		@Override
+		protected void beginResizing( int direction ) {
+			desktopManager.get().beginResizingFrame( getFrame(), direction );
+		}
+
+		@Override
+		protected void endResizing() {
+			desktopManager.get().endResizingFrame( getFrame() );
+		}
+	}
+
+	//---- class DragBorderComponent ------------------------------------------
+
+	protected class DragBorderComponent
+		extends JComponent
+		implements MouseListener, MouseMotionListener
+	{
+		private final int leadingResizeDir;
+		private final int centerResizeDir;
+		private final int trailingResizeDir;
+
+		private int resizeDir = -1;
+
+		private int leadingCornerDragWidth;
+		private int trailingCornerDragWidth;
+
+		// offsets of mouse position to window edges
+		private int dragLeftOffset;
+		private int dragRightOffset;
+		private int dragTopOffset;
+		private int dragBottomOffset;
+
+		protected DragBorderComponent( int leadingResizeDir, int centerResizeDir, int trailingResizeDir ) {
+			this.leadingResizeDir = leadingResizeDir;
+			this.centerResizeDir = centerResizeDir;
+			this.trailingResizeDir = trailingResizeDir;
+
+			setResizeDir( centerResizeDir );
+			setVisible( false );
+
+			addMouseListener( this );
+			addMouseMotionListener( this );
+		}
+
+		void setCornerDragWidths( int leading, int trailing ) {
+			leadingCornerDragWidth = leading;
+			trailingCornerDragWidth = trailing;
+		}
+
+		protected void setResizeDir( int resizeDir ) {
+			if( this.resizeDir == resizeDir )
+				return;
+			this.resizeDir = resizeDir;
+
+			setCursor( getPredefinedCursor( resizeDir ) );
+		}
+
+		@Override
+		public Dimension getPreferredSize() {
+			int thickness = UIScale.scale( borderDragThickness );
+			return new Dimension( thickness, thickness );
+		}
+
+		@Override
+		protected void paintComponent( Graphics g ) {
+			super.paintChildren( g );
+
+			// this is necessary because Dialog.setResizable() does not fire events
+			if( isDialog() )
+				updateVisibility();
+
+/*debug
+			int width = getWidth();
+			int height = getHeight();
+
+			g.setColor( java.awt.Color.blue );
+			boolean topOrBottom = (centerResizeDir == N_RESIZE_CURSOR || centerResizeDir == S_RESIZE_CURSOR);
+			if( topOrBottom ) {
+				g.drawLine( leadingCornerDragWidth, 0, leadingCornerDragWidth, height );
+				g.drawLine( width - trailingCornerDragWidth, 0, width - trailingCornerDragWidth, height );
+			} else {
+				g.drawLine( 0, leadingCornerDragWidth, width, leadingCornerDragWidth );
+				g.drawLine( 0, height - trailingCornerDragWidth, width, height - trailingCornerDragWidth );
+			}
+
+			g.setColor( java.awt.Color.red );
+			g.drawRect( 0, 0, width - 1, height - 1 );
+debug*/
+		}
+
+		@Override
+		public void mouseClicked( MouseEvent e ) {
+		}
+
+		@Override
+		public void mousePressed( MouseEvent e ) {
+			if( !isWindowResizable() )
+				return;
+
+			int xOnScreen = e.getXOnScreen();
+			int yOnScreen = e.getYOnScreen();
+			Rectangle windowBounds = getWindowBounds();
+
+			// compute offsets of mouse position to window edges
+			dragLeftOffset = xOnScreen - windowBounds.x;
+			dragTopOffset = yOnScreen - windowBounds.y;
+			dragRightOffset = windowBounds.x + windowBounds.width - xOnScreen;
+			dragBottomOffset = windowBounds.y + windowBounds.height - yOnScreen;
+
+			int direction = 0;
+			switch( resizeDir ) {
+				case N_RESIZE_CURSOR:	direction = NORTH; break;
+				case S_RESIZE_CURSOR:	direction = SOUTH; break;
+				case W_RESIZE_CURSOR:	direction = WEST; break;
+				case E_RESIZE_CURSOR:	direction = EAST; break;
+				case NW_RESIZE_CURSOR:	direction = NORTH_WEST; break;
+				case NE_RESIZE_CURSOR:	direction = NORTH_EAST; break;
+				case SW_RESIZE_CURSOR:	direction = SOUTH_WEST; break;
+				case SE_RESIZE_CURSOR:	direction = SOUTH_EAST; break;
+			}
+			beginResizing( direction );
+		}
+
+		@Override
+		public void mouseReleased( MouseEvent e ) {
+			if( !isWindowResizable() )
+				return;
+
+			dragLeftOffset = dragRightOffset = dragTopOffset = dragBottomOffset = 0;
+
+			endResizing();
+		}
+
+		@Override public void mouseEntered( MouseEvent e ) {}
+		@Override public void mouseExited( MouseEvent e ) {}
+
+		@Override
+		public void mouseMoved( MouseEvent e ) {
+			boolean topOrBottom = (centerResizeDir == N_RESIZE_CURSOR || centerResizeDir == S_RESIZE_CURSOR);
+			int xy = topOrBottom ? e.getX() : e.getY();
+			int wh = topOrBottom ? getWidth() : getHeight();
+
+			setResizeDir( xy <= leadingCornerDragWidth
+				? leadingResizeDir
+				: (xy >= wh - trailingCornerDragWidth
+					? trailingResizeDir
+					: centerResizeDir) );
+		}
+
+		@Override
+		public void mouseDragged( MouseEvent e ) {
+			if( !isWindowResizable() )
+				return;
+
+			int xOnScreen = e.getXOnScreen();
+			int yOnScreen = e.getYOnScreen();
+
+			// Get current window bounds and compute new bounds based them.
+			// This is necessary because window manager may alter window bounds while resizing.
+			// E.g. when having two monitors with different scale factors and resizing
+			// a window on first screen to the second screen, then the window manager may
+			// decide at some point that the window should be only on second screen
+			// and adjusts its bounds.
+			Rectangle oldBounds = getWindowBounds();
+			Rectangle newBounds = new Rectangle( oldBounds );
+
+			// compute new window bounds
+
+			// top
+			if( resizeDir == N_RESIZE_CURSOR || resizeDir == NW_RESIZE_CURSOR || resizeDir == NE_RESIZE_CURSOR ) {
+				newBounds.y = yOnScreen - dragTopOffset;
+				newBounds.height += (oldBounds.y - newBounds.y);
+			}
+
+			// bottom
+			if( resizeDir == S_RESIZE_CURSOR || resizeDir == SW_RESIZE_CURSOR || resizeDir == SE_RESIZE_CURSOR )
+				newBounds.height = (yOnScreen + dragBottomOffset) - newBounds.y;
+
+			// left
+			if( resizeDir == W_RESIZE_CURSOR || resizeDir == NW_RESIZE_CURSOR || resizeDir == SW_RESIZE_CURSOR ) {
+				newBounds.x = xOnScreen - dragLeftOffset;
+				newBounds.width += (oldBounds.x - newBounds.x);
+			}
+
+			// right
+			if( resizeDir == E_RESIZE_CURSOR || resizeDir == NE_RESIZE_CURSOR || resizeDir == SE_RESIZE_CURSOR )
+				newBounds.width = (xOnScreen + dragRightOffset) - newBounds.x;
+
+			// apply minimum window size
+			Dimension minimumSize = honorMinimumSizeOnResize() ? getWindowMinimumSize() : null;
+			if( minimumSize == null )
+				minimumSize = UIScale.scale( new Dimension( 150, 50 ) );
+			if( newBounds.width < minimumSize.width ) {
+				if( newBounds.x != oldBounds.x )
+					newBounds.x -= (minimumSize.width - newBounds.width);
+				newBounds.width = minimumSize.width;
+			}
+			if( newBounds.height < minimumSize.height ) {
+				if( newBounds.y != oldBounds.y )
+					newBounds.y -= (minimumSize.height - newBounds.height);
+				newBounds.height = minimumSize.height;
+			}
+
+			// set window bounds
+			if( !newBounds.equals( oldBounds ) )
+				setWindowBounds( newBounds );
+		}
+	}
+}

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

@@ -0,0 +1,315 @@
+/*
+ * 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.EventQueue;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.HierarchyEvent;
+import java.awt.event.HierarchyListener;
+import java.beans.PropertyChangeListener;
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
+import javax.swing.JRootPane;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.plaf.BorderUIResource;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.FlatSystemProperties;
+import com.formdev.flatlaf.util.HiDPIUtils;
+import com.formdev.flatlaf.util.SystemInfo;
+
+/**
+ * Support for custom window decorations provided by JetBrains Runtime (based on OpenJDK).
+ * Requires that the application runs on Windows 10 in a JetBrains Runtime 11 or later.
+ * <ul>
+ *   <li><a href="https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime">https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime</a></li>
+ *   <li><a href="https://github.com/JetBrains/JetBrainsRuntime">https://github.com/JetBrains/JetBrainsRuntime</a></li>
+ * </ul>
+ *
+ * @author Karl Tauber
+ */
+public class JBRCustomDecorations
+{
+	private static boolean initialized;
+	private static Method Window_hasCustomDecoration;
+	private static Method Window_setHasCustomDecoration;
+	private static Method WWindowPeer_setCustomDecorationHitTestSpots;
+	private static Method WWindowPeer_setCustomDecorationTitleBarHeight;
+	private static Method AWTAccessor_getComponentAccessor;
+	private static Method AWTAccessor_ComponentAccessor_getPeer;
+
+	public static boolean isSupported() {
+		initialize();
+		return Window_setHasCustomDecoration != null;
+	}
+
+	static void install( JRootPane rootPane ) {
+		if( !isSupported() )
+			return;
+
+		// check whether root pane already has a parent, which is the case when switching LaF
+		if( rootPane.getParent() != null )
+			return;
+
+		// Use hierarchy listener to wait until the root pane is added to a window.
+		// Enabling JBR decorations must be done very early, probably before
+		// window becomes displayable (window.isDisplayable()). Tried also using
+		// "ancestor" property change event on root pane, but this is invoked too late.
+		HierarchyListener addListener = new HierarchyListener() {
+			@Override
+			public void hierarchyChanged( HierarchyEvent e ) {
+				if( e.getChanged() != rootPane || (e.getChangeFlags() & HierarchyEvent.PARENT_CHANGED) == 0 )
+					return;
+
+				Container parent = e.getChangedParent();
+				if( parent instanceof Window )
+					install( (Window) parent );
+
+				// use invokeLater to remove listener to avoid that listener
+				// is removed while listener queue is processed
+				EventQueue.invokeLater( () -> {
+					rootPane.removeHierarchyListener( this );
+				} );
+			}
+		};
+		rootPane.addHierarchyListener( addListener );
+	}
+
+	static void install( Window window ) {
+		if( !isSupported() )
+			return;
+
+		// do not enable JBR decorations if LaF provides decorations
+		if( UIManager.getLookAndFeel().getSupportsWindowDecorations() )
+			return;
+
+		if( window instanceof JFrame ) {
+			JFrame frame = (JFrame) window;
+
+			// do not enable JBR decorations if JFrame should use system window decorations
+			// and if not forced to use JBR decorations
+			if( !JFrame.isDefaultLookAndFeelDecorated() &&
+				!FlatSystemProperties.getBoolean( FlatSystemProperties.USE_JETBRAINS_CUSTOM_DECORATIONS, false ))
+			  return;
+
+			// do not enable JBR decorations if frame is undecorated
+			if( frame.isUndecorated() )
+				return;
+
+			// enable JBR custom window decoration for window
+			setHasCustomDecoration( frame );
+
+			// enable Swing window decoration
+			frame.getRootPane().setWindowDecorationStyle( JRootPane.FRAME );
+
+		} else if( window instanceof JDialog ) {
+			JDialog dialog = (JDialog) window;
+
+			// do not enable JBR decorations if JDialog should use system window decorations
+			// and if not forced to use JBR decorations
+			if( !JDialog.isDefaultLookAndFeelDecorated() &&
+				!FlatSystemProperties.getBoolean( FlatSystemProperties.USE_JETBRAINS_CUSTOM_DECORATIONS, false ))
+			  return;
+
+			// do not enable JBR decorations if dialog is undecorated
+			if( dialog.isUndecorated() )
+				return;
+
+			// enable JBR custom window decoration for window
+			setHasCustomDecoration( dialog );
+
+			// enable Swing window decoration
+			dialog.getRootPane().setWindowDecorationStyle( JRootPane.PLAIN_DIALOG );
+		}
+	}
+
+	static boolean hasCustomDecoration( Window window ) {
+		if( !isSupported() )
+			return false;
+
+		try {
+			return (Boolean) Window_hasCustomDecoration.invoke( window );
+		} catch( Exception ex ) {
+			Logger.getLogger( FlatLaf.class.getName() ).log( Level.SEVERE, null, ex );
+			return false;
+		}
+	}
+
+	static void setHasCustomDecoration( Window window ) {
+		if( !isSupported() )
+			return;
+
+		try {
+			Window_setHasCustomDecoration.invoke( window );
+		} catch( Exception ex ) {
+			Logger.getLogger( FlatLaf.class.getName() ).log( Level.SEVERE, null, ex );
+		}
+	}
+
+	static void setHitTestSpotsAndTitleBarHeight( Window window, List<Rectangle> hitTestSpots, int titleBarHeight ) {
+		if( !isSupported() )
+			return;
+
+		try {
+			Object compAccessor = AWTAccessor_getComponentAccessor.invoke( null );
+			Object peer = AWTAccessor_ComponentAccessor_getPeer.invoke( compAccessor, window );
+			WWindowPeer_setCustomDecorationHitTestSpots.invoke( peer, hitTestSpots );
+			WWindowPeer_setCustomDecorationTitleBarHeight.invoke( peer, titleBarHeight );
+		} catch( Exception ex ) {
+			Logger.getLogger( FlatLaf.class.getName() ).log( Level.SEVERE, null, ex );
+		}
+	}
+
+	private static void initialize() {
+		if( initialized )
+			return;
+		initialized = true;
+
+		// requires JetBrains Runtime 11 and Windows 10
+		if( !SystemInfo.isJetBrainsJVM_11_orLater || !SystemInfo.isWindows_10_orLater )
+			return;
+
+		if( !FlatSystemProperties.getBoolean( FlatSystemProperties.USE_JETBRAINS_CUSTOM_DECORATIONS, true ) )
+			return;
+
+		try {
+			Class<?> awtAcessorClass = Class.forName( "sun.awt.AWTAccessor" );
+			Class<?> compAccessorClass = Class.forName( "sun.awt.AWTAccessor$ComponentAccessor" );
+			AWTAccessor_getComponentAccessor = awtAcessorClass.getDeclaredMethod( "getComponentAccessor" );
+			AWTAccessor_ComponentAccessor_getPeer = compAccessorClass.getDeclaredMethod( "getPeer", Component.class );
+
+			Class<?> peerClass = Class.forName( "sun.awt.windows.WWindowPeer" );
+			WWindowPeer_setCustomDecorationHitTestSpots = peerClass.getDeclaredMethod( "setCustomDecorationHitTestSpots", List.class );
+			WWindowPeer_setCustomDecorationTitleBarHeight = peerClass.getDeclaredMethod( "setCustomDecorationTitleBarHeight", int.class );
+			WWindowPeer_setCustomDecorationHitTestSpots.setAccessible( true );
+			WWindowPeer_setCustomDecorationTitleBarHeight.setAccessible( true );
+
+			Window_hasCustomDecoration = Window.class.getDeclaredMethod( "hasCustomDecoration" );
+			Window_setHasCustomDecoration = Window.class.getDeclaredMethod( "setHasCustomDecoration" );
+			Window_hasCustomDecoration.setAccessible( true );
+			Window_setHasCustomDecoration.setAccessible( true );
+		} catch( Exception ex ) {
+			// ignore
+		}
+	}
+
+	//---- class JBRWindowTopBorder -------------------------------------------
+
+	static class JBRWindowTopBorder
+		extends BorderUIResource.EmptyBorderUIResource
+	{
+		private static JBRWindowTopBorder instance;
+
+		private final Color defaultActiveBorder = new Color( 0x707070 );
+		private final Color inactiveLightColor = new Color( 0xaaaaaa );
+		private final Color inactiveDarkColor = new Color( 0x3f3f3f );
+
+		private boolean colorizationAffectsBorders;
+		private Color activeColor = defaultActiveBorder;
+
+		static JBRWindowTopBorder getInstance() {
+			if( instance == null )
+				instance = new JBRWindowTopBorder();
+			return instance;
+		}
+
+        private JBRWindowTopBorder() {
+			super( 1, 0, 0, 0 );
+
+			colorizationAffectsBorders = calculateAffectsBorders();
+			activeColor = calculateActiveBorderColor();
+
+			Toolkit toolkit = Toolkit.getDefaultToolkit();
+			toolkit.addPropertyChangeListener( "win.dwm.colorizationColor.affects.borders", e -> {
+				colorizationAffectsBorders = calculateAffectsBorders();
+				activeColor = calculateActiveBorderColor();
+			} );
+
+			PropertyChangeListener l = e -> {
+				activeColor = calculateActiveBorderColor();
+			};
+			toolkit.addPropertyChangeListener( "win.dwm.colorizationColor", l );
+			toolkit.addPropertyChangeListener( "win.dwm.colorizationColorBalance", l );
+			toolkit.addPropertyChangeListener( "win.frame.activeBorderColor", l );
+		}
+
+		private boolean calculateAffectsBorders() {
+			Object value = Toolkit.getDefaultToolkit().getDesktopProperty( "win.dwm.colorizationColor.affects.borders" );
+			return (value instanceof Boolean) ? (Boolean) value : true;
+		}
+
+		private Color calculateActiveBorderColor() {
+			if( !colorizationAffectsBorders )
+				return defaultActiveBorder;
+
+			Toolkit toolkit = Toolkit.getDefaultToolkit();
+			Color colorizationColor = (Color) toolkit.getDesktopProperty( "win.dwm.colorizationColor" );
+			if( colorizationColor != null ) {
+				Object colorizationColorBalanceObj = toolkit.getDesktopProperty( "win.dwm.colorizationColorBalance" );
+				if( colorizationColorBalanceObj instanceof Integer ) {
+					int colorizationColorBalance = (Integer) colorizationColorBalanceObj;
+					if( colorizationColorBalance < 0 )
+						colorizationColorBalance = 100;
+
+					if( colorizationColorBalance == 0 )
+						return new Color( 0xD9D9D9 );
+					if( colorizationColorBalance == 100 )
+						return colorizationColor;
+
+					float alpha = colorizationColorBalance / 100.0f;
+					float remainder = 1 - alpha;
+					int r = Math.round( (colorizationColor.getRed() * alpha + 0xD9 * remainder) );
+					int g = Math.round( (colorizationColor.getGreen() * alpha + 0xD9 * remainder) );
+					int b = Math.round( (colorizationColor.getBlue() * alpha + 0xD9 * remainder) );
+					return new Color( r, g, b );
+				}
+				return colorizationColor;
+			}
+
+			Color activeBorderColor = (Color) toolkit.getDesktopProperty( "win.frame.activeBorderColor" );
+			return (activeBorderColor != null) ? activeBorderColor : UIManager.getColor( "MenuBar.borderColor" );
+		}
+
+		@Override
+		public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+			Window window = SwingUtilities.windowForComponent( c );
+			boolean active = (window != null) ? window.isActive() : false;
+
+			g.setColor( active ? activeColor : (FlatLaf.isLafDark() ? inactiveDarkColor : inactiveLightColor) );
+			HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, width, height, this::paintImpl );
+		}
+
+		private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+			g.drawRect( x, y, width - 1, 0 );
+		}
+
+		void repaintBorder( Component c ) {
+			c.repaint( 0, 0, c.getWidth(), 1 );
+		}
+	}
+}

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)
+			FlatBorder border = FlatUIUtils.getOutsideFlatBorder( c2 );
-				? new Insets( focusWidth, focusWidth, focusWidth, focusWidth )
+			if( border != null ) {
-				: 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/Animator.java

@@ -0,0 +1,317 @@
+/*
+ * 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.util.ArrayList;
+import javax.swing.Timer;
+
+/**
+ * Simple animator based on ideas and concepts from "Filthy Rich Clients" book
+ * and "Timing Framework" library.
+ *
+ * @author Karl Tauber
+ */
+public class Animator
+{
+	private int duration;
+	private int resolution = 10;
+	private Interpolator interpolator;
+	private final ArrayList<TimingTarget> targets = new ArrayList<>();
+	private final Runnable endRunnable;
+
+	private boolean running;
+	private boolean hasBegun;
+	private boolean timeToStop;
+	private long startTime;
+	private Timer timer;
+
+	/**
+	 * Creates an animation that runs duration milliseconds.
+	 * Use {@link #addTarget(TimingTarget)} to receive timing events
+	 * and {@link #start()} to start the animation.
+	 *
+	 * @param duration the duration of the animation in milliseconds
+	 */
+	public Animator( int duration ) {
+		this( duration, null, null );
+	}
+
+	/**
+	 * Creates an animation that runs duration milliseconds.
+	 * Use {@link #start()} to start the animation.
+	 *
+	 * @param duration the duration of the animation in milliseconds
+	 * @param target the target that receives timing events
+	 */
+	public Animator( int duration, TimingTarget target ) {
+		this( duration, target, null );
+	}
+
+	/**
+	 * Creates an animation that runs duration milliseconds.
+	 * Use {@link #start()} to start the animation.
+	 *
+	 * @param duration the duration of the animation in milliseconds
+	 * @param target the target that receives timing events
+	 * @param endRunnable a runnable invoked when the animation ends; or {@code null}
+	 */
+	public Animator( int duration, TimingTarget target, Runnable endRunnable ) {
+		setDuration( duration );
+		addTarget( target );
+		this.endRunnable = endRunnable;
+	}
+
+	/**
+	 * Returns the duration of the animation in milliseconds.
+	 */
+	public int getDuration() {
+		return duration;
+	}
+
+	/**
+	 * Sets the duration of the animation in milliseconds.
+	 *
+	 * @throws IllegalStateException if animation is running
+	 * @throws IllegalArgumentException if duration is <= zero
+	 */
+	public void setDuration( int duration ) {
+		throwExceptionIfRunning();
+		if( duration <= 0 )
+			throw new IllegalArgumentException();
+		this.duration = duration;
+	}
+
+	/**
+	 * Returns the resolution of the animation in milliseconds (default is 10).
+	 * Resolution is the amount of time between timing events.
+	 */
+	public int getResolution() {
+		return resolution;
+	}
+
+	/**
+	 * Sets the resolution of the animation in milliseconds.
+	 *
+	 * @param resolution the resolution of the animation in milliseconds
+	 * @throws IllegalStateException if animation is running
+	 * @throws IllegalArgumentException if resolution is <= zero
+	 */
+	public void setResolution( int resolution ) {
+		throwExceptionIfRunning();
+		if( resolution <= 0 )
+			throw new IllegalArgumentException();
+		this.resolution = resolution;
+	}
+
+	/**
+	 * Returns the interpolator for the animation.
+	 * Default is {@code null}, which means linear.
+	 */
+	public Interpolator getInterpolator() {
+		return interpolator;
+	}
+
+	/**
+	 * Sets the interpolator for the animation.
+	 *
+	 * @throws IllegalStateException if animation is running
+	 */
+	public void setInterpolator( Interpolator interpolator ) {
+		throwExceptionIfRunning();
+		this.interpolator = interpolator;
+	}
+
+	/**
+	 * Adds a target to the animation that receives timing events.
+	 *
+	 * @param target the target that receives timing events
+	 */
+	public void addTarget( TimingTarget target ) {
+		if( target == null )
+			return;
+
+		synchronized( targets ) {
+			if( !targets.contains( target ) )
+				targets.add( target );
+		}
+	}
+
+	/**
+	 * Removes a target from the animation.
+	 *
+	 * @param target the target that should be removed
+	 */
+	public void removeTarget( TimingTarget target ) {
+		synchronized( targets ) {
+			targets.remove( target );
+		}
+	}
+
+	/**
+	 * Starts the animation.
+	 *
+	 * @throws IllegalStateException if animation is running
+	 */
+	public void start() {
+		throwExceptionIfRunning();
+
+		running = true;
+		hasBegun = false;
+		timeToStop = false;
+		startTime = System.nanoTime() / 1000000;
+
+		timer = new Timer( resolution, e -> {
+			if( !hasBegun ) {
+				begin();
+				hasBegun = true;
+			}
+
+			timingEvent( getTimingFraction() );
+		} );
+		timer.setInitialDelay( 0 );
+		timer.start();
+	}
+
+	/**
+	 * Stops the animation before it normally ends.
+	 * Invokes {@link TimingTarget#end()} on timing targets.
+	 */
+	public void stop() {
+		stop( false );
+	}
+
+	/**
+	 * Cancels the animation before it normally ends.
+	 * Does not invoke {@link TimingTarget#end()} on timing targets.
+	 */
+	public void cancel() {
+		stop( true );
+	}
+
+	private void stop( boolean cancel ) {
+		if( timer != null ) {
+			timer.stop();
+			timer = null;
+		}
+
+		if( !cancel )
+			end();
+
+		running = false;
+		timeToStop = false;
+	}
+
+	/**
+	 * Returns whether this animation is running.
+	 */
+	public boolean isRunning() {
+		return running;
+	}
+
+	private float getTimingFraction() {
+		long currentTime = System.nanoTime() / 1000000;
+		long elapsedTime = currentTime - startTime;
+		timeToStop = (elapsedTime >= duration);
+
+		float fraction = clampFraction( (float) elapsedTime / duration );
+		if( interpolator != null )
+			fraction = clampFraction( interpolator.interpolate( fraction ) );
+		return fraction;
+	}
+
+	private float clampFraction( float fraction ) {
+		if( fraction < 0 )
+			return 0;
+		if( fraction > 1 )
+			return 1;
+		return fraction;
+	}
+
+	private void timingEvent( float fraction ) {
+		synchronized( targets ) {
+			for( TimingTarget target : targets )
+				target.timingEvent( fraction );
+		}
+
+		if( timeToStop )
+			stop();
+	}
+
+	private void begin() {
+		synchronized( targets ) {
+			for( TimingTarget target : targets )
+				target.begin();
+		}
+	}
+
+	private void end() {
+		synchronized( targets ) {
+			for( TimingTarget target : targets )
+				target.end();
+		}
+
+		if( endRunnable != null )
+			endRunnable.run();
+	}
+
+	private void throwExceptionIfRunning() {
+		if( isRunning() )
+			throw new IllegalStateException();
+	}
+
+	//---- interface TimingTarget ---------------------------------------------
+
+	/**
+	 * Animation callbacks.
+	 */
+	@FunctionalInterface
+	public interface TimingTarget {
+		/**
+		 * Invoked multiple times while animation is running.
+		 *
+		 * @param fraction the percent (0 to 1) elapsed of the current animation cycle
+		 */
+		void timingEvent( float fraction );
+
+		/**
+		 * Invoked when the animation begins.
+		 */
+		default void begin() {}
+
+		/**
+		 * Invoked when the animation ends.
+		 */
+		default void end() {}
+	}
+
+	//---- interface Interpolator ---------------------------------------------
+
+	/**
+	 * Interpolator used by animation to change timing fraction. E.g. for easing.
+	 */
+	@FunctionalInterface
+	public interface Interpolator {
+		/**
+		 * Interpolate the given fraction and returns a new fraction.
+		 * Both fractions are in range [0, 1].
+		 *
+		 * @param fraction the percent (0 to 1) elapsed of the current animation cycle
+		 * @return new fraction in range [0, 1]
+		 */
+		float interpolate( float fraction );
+	}
+}

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

@@ -35,7 +35,7 @@ public class ColorFunctions
 		return HSLColor.toRGB( hsl, alpha );
 	}
 
-	private static float clamp( float value ) {
+	public static float clamp( float value ) {
 		return (value < 0)
 			? 0
 			: ((value > 100)
@@ -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
+	 * Increase or decrease hue, saturation or luminance of a color in the HSL color space
-	 * or relative amount.
+	 * by an absolute or relative amount.
 	 */
-	public static class Lighten
+	public static class HSLIncreaseDecrease
 		implements ColorFunction
 	{
-		private final float amount;
+		public final int hslIndex;
-		private final boolean relative;
+		public final boolean increase;
-		private final boolean autoInverse;
+		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;
+			float amount2 = increase ? amount : -amount;
-			hsl[2] = clamp( relative
+			amount2 = autoInverse && shouldInverse( hsl ) ? -amount2 : amount2;
-				? (hsl[2] * ((100 + amount2) / 100))
+			hsl[hslIndex] = clamp( relative
-				: (hsl[2] + amount2) );
+				? (hsl[hslIndex] * ((100 + amount2) / 100))
+				: (hsl[hslIndex] + amount2) );
 		}
 
 		protected boolean shouldInverse( float[] hsl ) {
-			return hsl[2] >= 50;
+			return increase
-		}
+				? hsl[hslIndex] >= 50
-	}
+				: hsl[hslIndex] < 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;
 		}
 	}
 }

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

@@ -0,0 +1,105 @@
+/*
+ * 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;
+
+/**
+ * An interpolator for {@link Animator} that uses a cubic bezier curve.
+ *
+ * @author Karl Tauber
+ */
+public class CubicBezierEasing
+	implements Animator.Interpolator
+{
+	// common cubic-bezier easing functions (same as in CSS)
+	// https://developer.mozilla.org/en-US/docs/Web/CSS/easing-function
+	public static final CubicBezierEasing EASE = new CubicBezierEasing( 0.25f, 0.1f, 0.25f, 1f );
+	public static final CubicBezierEasing EASE_IN = new CubicBezierEasing( 0.42f, 0f, 1f, 1f );
+	public static final CubicBezierEasing EASE_IN_OUT = new CubicBezierEasing( 0.42f, 0f, 0.58f, 1f );
+	public static final CubicBezierEasing EASE_OUT = new CubicBezierEasing( 0f, 0f, 0.58f, 1f );
+
+	private final float x1;
+	private final float y1;
+	private final float x2;
+	private final float y2;
+
+	/**
+	 * Creates a cubic bezier easing interpolator with the given control points.
+	 * The start point of the cubic bezier curve is always 0,0 and the end point 1,1.
+	 *
+	 * @param x1 the x coordinate of the first control point in range [0, 1]
+	 * @param y1 the y coordinate of the first control point in range [0, 1]
+	 * @param x2 the x coordinate of the second control point in range [0, 1]
+	 * @param y2 the y coordinate of the second control point in range [0, 1]
+	 */
+	public CubicBezierEasing( float x1, float y1, float x2, float y2 ) {
+		if( x1 < 0 || x1 > 1 || y1 < 0 || y1 > 1 ||
+			x2 < 0 || x2 > 1 || y2 < 0 || y2 > 1 )
+		  throw new IllegalArgumentException( "control points must be in range [0, 1]");
+
+		this.x1 = x1;
+		this.y1 = y1;
+		this.x2 = x2;
+		this.y2 = y2;
+	}
+
+	@Override
+	public float interpolate( float fraction ) {
+		if( fraction <= 0 || fraction >= 1 )
+			return fraction;
+
+		// use binary search
+		float low = 0;
+		float high = 1;
+		while( true ) {
+			float mid = (low + high) / 2;
+			float estimate = cubicBezier( mid, x1, x2 );
+			if( Math.abs( fraction - estimate ) < 0.0005f )
+				return cubicBezier( mid, y1, y2 );
+			if( estimate < fraction )
+				low = mid;
+			else
+				high = mid;
+		}
+	}
+
+	/**
+	 * Computes the x or y point on a cubic bezier curve for a given t value.
+	 *
+	 * https://en.wikipedia.org/wiki/B%C3%A9zier_curve#Cubic_B%C3%A9zier_curves
+	 *
+	 * The general cubic bezier formula is:
+	 *   x = b0*x0 + b1*x1 + b2*x2 + b3*x3
+	 *   y = b0*y0 + b1*y1 + b2*y2 + b3*y3
+	 *
+	 * where:
+	 *   b0 = (1-t)^3
+	 *   b1 = 3 * t * (1-t)^2
+	 *   b2 = 3 * t^2 * (1-t)
+	 *   b3 = t^3
+	 *
+	 *  x0,y0 is always 0,0 and x3,y3 is 1,1, so we can simplify to:
+	 *   x = b1*x1 + b2*x2 + b3
+	 *   y = b1*x1 + b2*x2 + b3
+	 */
+	private static float cubicBezier( float t, float xy1, float xy2 ) {
+		float invT = (1 - t);
+		float b1 = 3 * t * (invT * invT);
+		float b2 = 3 * (t * t) * invT;
+		float b3 = t * t * t;
+		return (b1 * xy1) + (b2 * xy2) + b3;
+	}
+}

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/HiDPIUtils.java

@@ -16,10 +16,14 @@
 
 package com.formdev.flatlaf.util;
 
+import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.font.GlyphVector;
 import java.awt.geom.AffineTransform;
 import java.awt.geom.Rectangle2D;
+import java.text.AttributedCharacterIterator;
 import javax.swing.JComponent;
+import com.formdev.flatlaf.FlatSystemProperties;
 
 /**
  * @author Karl Tauber
@@ -95,4 +99,134 @@ public class HiDPIUtils
 	private static double normalize( double value ) {
 		return Math.floor( value + 0.25 ) + 0.25;
 	}
+
+
+	private static Boolean useTextYCorrection;
+
+	private static boolean useTextYCorrection() {
+		if( useTextYCorrection == null )
+			useTextYCorrection = FlatSystemProperties.getBoolean( FlatSystemProperties.USE_TEXT_Y_CORRECTION, true );
+		return useTextYCorrection;
+	}
+
+	/**
+	 * When painting text on HiDPI screens and the JRE scales, then the text is
+	 * painted too far down on some operating systems.
+	 * The higher the system scale factor is, the more.
+	 * <p>
+	 * This methods computes a correction value for the Y position.
+	 */
+	public static float computeTextYCorrection( Graphics2D g ) {
+		if( !useTextYCorrection() || !SystemInfo.isWindows )
+			return 0;
+
+		if( !SystemInfo.isJava_9_orLater )
+			return UIScale.getUserScaleFactor() > 1 ? -UIScale.scale( 0.625f ) : 0;
+
+		AffineTransform t = g.getTransform();
+		double scaleY = t.getScaleY();
+		if( scaleY < 1.25 )
+			return 0;
+
+		// Text is painted at slightly different Y positions depending on scale factor
+		// and Y position of component.
+		// The exact reason is not yet known (to me), but there are several factors:
+		// - fractional scale factors result in fractional component Y device coordinates
+		// - fractional text Y device coordinates are rounded for horizontal lines of characters
+		// - maybe different rounding methods for drawing primitives (e.g. rectangle) and text
+		// - Java adds 0.5 to X/Y positions in before drawing string in BufferedTextPipe.enqueueGlyphList()
+
+		// this is not the optimal solution, but works very good in most cases
+		// (tested with class FlatPaintingStringTest on Windows 10 with font "Segoe UI")
+		if( scaleY <= 1.25 )
+			return -0.875f;
+		if( scaleY <= 1.5 )
+			return -0.625f;
+		if( scaleY <= 1.75 )
+			return -0.875f;
+		if( scaleY <= 2.0 )
+			return -0.75f;
+		if( scaleY <= 2.25 )
+			return -0.875f;
+		if( scaleY <= 3.5 )
+			return -0.75f;
+		return -0.875f;
+	}
+
+	/**
+	 * Applies Y correction and draws the given string at the specified location.
+	 * The provided component is used to query text properties and anti-aliasing hints.
+	 * <p>
+	 * Use this method instead of {@link Graphics#drawString(String, int, int)} for correct anti-aliasing.
+	 * <p>
+	 * Replacement for {@code SwingUtilities2.drawString()}.
+	 */
+	public static void drawStringWithYCorrection( JComponent c, Graphics2D g, String text, int x, int y ) {
+		drawStringUnderlineCharAtWithYCorrection( c, g, text, -1, x, y );
+	}
+
+	/**
+	 * Applies Y correction and draws the given string at the specified location underlining the specified character.
+	 * The provided component is used to query text properties and anti-aliasing hints.
+	 * <p>
+	 * Replacement for {@code SwingUtilities2.drawStringUnderlineCharAt()}.
+	 */
+	public static void drawStringUnderlineCharAtWithYCorrection( JComponent c,
+		Graphics2D g, String text, int underlinedIndex, int x, int y )
+	{
+		float yCorrection = computeTextYCorrection( g );
+		if( yCorrection != 0 ) {
+			g.translate( 0, yCorrection );
+			JavaCompatibility.drawStringUnderlineCharAt( c, g, text, underlinedIndex, x, y );
+			g.translate( 0, -yCorrection );
+		} else
+			JavaCompatibility.drawStringUnderlineCharAt( c, g, text, underlinedIndex, x, y );
+	}
+
+	/**
+	 * Creates a graphics object and applies Y correction to string drawing methods.
+	 * If no Y correction is necessary, the passed in graphics object is returned.
+	 */
+	public static Graphics2D createGraphicsTextYCorrection( Graphics2D g ) {
+		float yCorrection = computeTextYCorrection( g );
+		if( yCorrection == 0 )
+			return g;
+
+		return new Graphics2DProxy( g ) {
+			@Override
+			public void drawString( String str, int x, int y ) {
+				super.drawString( str, x, y + yCorrection );
+			}
+
+			@Override
+			public void drawString( String str, float x, float y ) {
+				super.drawString( str, x, y + yCorrection );
+			}
+
+			@Override
+			public void drawString( AttributedCharacterIterator iterator, int x, int y ) {
+				super.drawString( iterator, x, y + yCorrection );
+			}
+
+			@Override
+			public void drawString( AttributedCharacterIterator iterator, float x, float y ) {
+				super.drawString( iterator, x, y + yCorrection );
+			}
+
+			@Override
+			public void drawChars( char[] data, int offset, int length, int x, int y ) {
+				super.drawChars( data, offset, length, x, Math.round( y + yCorrection ) );
+			}
+
+			@Override
+			public void drawBytes( byte[] data, int offset, int length, int x, int y ) {
+				super.drawBytes( data, offset, length, x, Math.round( y + yCorrection ) );
+			}
+
+			@Override
+			public void drawGlyphVector( GlyphVector g, float x, float y ) {
+				super.drawGlyphVector( g, x, y + yCorrection );
+			}
+		};
+	}
 }

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

@@ -48,10 +48,10 @@ public class JavaCompatibility
 		synchronized( JavaCompatibility.class ) {
 			if( drawStringUnderlineCharAtMethod == null ) {
 				try {
-					Class<?> cls = Class.forName( SystemInfo.IS_JAVA_9_OR_LATER
+					Class<?> cls = Class.forName( SystemInfo.isJava_9_orLater
 						? "javax.swing.plaf.basic.BasicGraphicsUtils"
 						: "sun.swing.SwingUtilities2" );
-					drawStringUnderlineCharAtMethod = cls.getMethod( "drawStringUnderlineCharAt", SystemInfo.IS_JAVA_9_OR_LATER
+					drawStringUnderlineCharAtMethod = cls.getMethod( "drawStringUnderlineCharAt", SystemInfo.isJava_9_orLater
 						? new Class[] { JComponent.class, Graphics2D.class, String.class, int.class, float.class, float.class }
 						: new Class[] { JComponent.class, Graphics.class, String.class, int.class, int.class, int.class } );
 				} catch( Exception ex ) {
@@ -62,7 +62,7 @@ public class JavaCompatibility
 		}
 
 		try {
-			if( SystemInfo.IS_JAVA_9_OR_LATER )
+			if( SystemInfo.isJava_9_orLater )
 				drawStringUnderlineCharAtMethod.invoke( null, c, g, text, underlinedIndex, (float) x, (float) y );
 			else
 				drawStringUnderlineCharAtMethod.invoke( null, c, g, text, underlinedIndex, x, y );

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/ScaledEmptyBorder.java

@@ -0,0 +1,53 @@
+/*
+ * 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 static com.formdev.flatlaf.util.UIScale.scale;
+import java.awt.Component;
+import java.awt.Insets;
+import javax.swing.border.EmptyBorder;
+
+/**
+ * Empty border that scales insets.
+ *
+ * @author Karl Tauber
+ */
+public class ScaledEmptyBorder
+	extends EmptyBorder
+{
+	public ScaledEmptyBorder( int top, int left, int bottom, int right ) {
+		super( top, left, bottom, right );
+	}
+
+	public ScaledEmptyBorder( Insets insets ) {
+		super( insets );
+	}
+
+	@Override
+	public Insets getBorderInsets() {
+		return new Insets( scale( top ), scale( left ), scale( bottom ), scale( right ) );
+	}
+
+	@Override
+	public Insets getBorderInsets( Component c, Insets insets ) {
+		insets.left = scale( left );
+		insets.top = scale( top );
+		insets.right = scale( right );
+		insets.bottom = scale( bottom );
+		return insets;
+	}
+}

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

@@ -0,0 +1,184 @@
+/*
+ * 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 final int iconWidth;
+	private final int iconHeight;
+
+	private double lastSystemScaleFactor;
+	private float lastUserScaleFactor;
+	private Image lastImage;
+
+	public ScaledImageIcon( ImageIcon imageIcon ) {
+		this( imageIcon, imageIcon.getIconWidth(), imageIcon.getIconHeight() );
+	}
+
+	public ScaledImageIcon( ImageIcon imageIcon, int iconWidth, int iconHeight ) {
+		this.imageIcon = imageIcon;
+		this.iconWidth = iconWidth;
+		this.iconHeight = iconHeight;
+	}
+
+	@Override
+	public int getIconWidth() {
+		return UIScale.scale( iconWidth );
+	}
+
+	@Override
+	public int getIconHeight() {
+		return UIScale.scale( iconHeight );
+	}
+
+	@Override
+	public void paintIcon( Component c, Graphics g, int x, int y ) {
+/*debug
+		g.setColor( Color.red );
+		g.drawRect( x, y, getIconWidth() - 1, getIconHeight() - 1 );
+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 && iconWidth == imageIcon.getIconWidth() && iconHeight == imageIcon.getIconHeight() ) {
+			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( iconWidth * scaleFactor );
+		int destImageHeight = (int) Math.round( iconHeight * scaleFactor );
+
+		// get resolution variant of image if it is a multi-resolution image
+		Image image = getResolutionVariant( 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 );
+	}
+
+	protected Image getResolutionVariant( int destImageWidth, int destImageHeight ) {
+		return MultiResolutionImageSupport.getResolutionVariant(
+			imageIcon.getImage(), destImageWidth, destImageHeight );
+	}
+
+	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

@@ -27,46 +27,60 @@ import java.util.StringTokenizer;
 public class SystemInfo
 {
 	// platforms
-	public static final boolean IS_WINDOWS;
+	public static final boolean isWindows;
-	public static final boolean IS_MAC;
+	public static final boolean isMacOS;
-	public static final boolean IS_LINUX;
+	public static final boolean isLinux;
 
 	// OS versions
-	public static final boolean IS_MAC_OS_10_11_EL_CAPITAN_OR_LATER;
+	public static final long osVersion;
+	public static final boolean isWindows_10_orLater;
+	public static final boolean isMacOS_10_11_ElCapitan_orLater;
+	public static final boolean isMacOS_10_14_Mojave_orLater;
+	public static final boolean isMacOS_10_15_Catalina_orLater;
 
 	// Java versions
-	public static final boolean IS_JAVA_9_OR_LATER;
+	public static final long javaVersion;
+	public static final boolean isJava_9_orLater;
+	public static final boolean isJava_11_orLater;
+	public static final boolean isJava_15_orLater;
 
 	// Java VMs
-	public static final boolean IS_JETBRAINS_JVM;
+	public static final boolean isJetBrainsJVM;
+	public static final boolean isJetBrainsJVM_11_orLater;
 
 	// UI toolkits
-	public static final boolean IS_KDE;
+	public static final boolean isKDE;
 
 	static {
 		// platforms
 		String osName = System.getProperty( "os.name" ).toLowerCase( Locale.ENGLISH );
-		IS_WINDOWS = osName.startsWith( "windows" );
+		isWindows = osName.startsWith( "windows" );
-		IS_MAC = osName.startsWith( "mac" );
+		isMacOS = osName.startsWith( "mac" );
-		IS_LINUX = osName.startsWith( "linux" );
+		isLinux = osName.startsWith( "linux" );
 
 		// OS versions
-		long osVersion = scanVersion( System.getProperty( "os.version" ) );
+		osVersion = scanVersion( System.getProperty( "os.version" ) );
-		IS_MAC_OS_10_11_EL_CAPITAN_OR_LATER = (IS_MAC && osVersion >= toVersion( 10, 11, 0, 0 ));
+		isWindows_10_orLater = (isWindows && osVersion >= toVersion( 10, 0, 0, 0 ));
+		isMacOS_10_11_ElCapitan_orLater = (isMacOS && osVersion >= toVersion( 10, 11, 0, 0 ));
+		isMacOS_10_14_Mojave_orLater = (isMacOS && osVersion >= toVersion( 10, 14, 0, 0 ));
+		isMacOS_10_15_Catalina_orLater = (isMacOS && osVersion >= toVersion( 10, 15, 0, 0 ));
 
 		// Java versions
-		long javaVersion = scanVersion( System.getProperty( "java.version" ) );
+		javaVersion = scanVersion( System.getProperty( "java.version" ) );
-		IS_JAVA_9_OR_LATER = (javaVersion >= toVersion( 9, 0, 0, 0 ));
+		isJava_9_orLater = (javaVersion >= toVersion( 9, 0, 0, 0 ));
+		isJava_11_orLater = (javaVersion >= toVersion( 11, 0, 0, 0 ));
+		isJava_15_orLater = (javaVersion >= toVersion( 15, 0, 0, 0 ));
 
 		// Java VMs
-		IS_JETBRAINS_JVM = System.getProperty( "java.vm.vendor", "Unknown" )
+		isJetBrainsJVM = System.getProperty( "java.vm.vendor", "Unknown" )
 			.toLowerCase( Locale.ENGLISH ).contains( "jetbrains" );
+		isJetBrainsJVM_11_orLater = isJetBrainsJVM && isJava_11_orLater;
 
 		// UI toolkits
-		IS_KDE = (IS_LINUX && System.getenv( "KDE_FULL_SESSION" ) != null);
+		isKDE = (isLinux && System.getenv( "KDE_FULL_SESSION" ) != null);
 	}
 
-	private static long scanVersion( String version ) {
+	public static long scanVersion( String version ) {
 		int major = 1;
 		int minor = 0;
 		int micro = 0;
@@ -84,7 +98,7 @@ public class SystemInfo
 		return toVersion( major, minor, micro, patch );
 	}
 
-	private static long toVersion( int major, int minor, int micro, int patch ) {
+	public static long toVersion( int major, int minor, int micro, int patch ) {
 		return ((long) major << 48) + ((long) minor << 32) + ((long) micro << 16) + patch;
 	}
 }

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

@@ -32,6 +32,7 @@ import javax.swing.plaf.DimensionUIResource;
 import javax.swing.plaf.FontUIResource;
 import javax.swing.plaf.InsetsUIResource;
 import javax.swing.plaf.UIResource;
+import com.formdev.flatlaf.FlatSystemProperties;
 
 /**
  * Two scaling modes are supported for HiDPI displays:
@@ -89,10 +90,10 @@ public class UIScale
 
 		jreHiDPI = false;
 
-		if( SystemInfo.IS_JAVA_9_OR_LATER ) {
+		if( SystemInfo.isJava_9_orLater ) {
 			// Java 9 and later supports per-monitor scaling
 			jreHiDPI = true;
-		} else if( SystemInfo.IS_JETBRAINS_JVM ) {
+		} else if( SystemInfo.isJetBrainsJVM ) {
 			// IntelliJ IDEA ships its own JetBrains Java 8 JRE that may supports per-monitor scaling
 			// see com.intellij.ui.JreHiDpiUtil.isJreHiDPIEnabled()
 			try {
@@ -176,27 +177,25 @@ public class UIScale
 		// default font size
 		float fontSizeDivider = 12f;
 
-		if( SystemInfo.IS_WINDOWS ) {
+		if( SystemInfo.isWindows ) {
 			// Windows LaF uses Tahoma font rather than the actual Windows system font (Segoe UI),
 			// and its size is always ca. 10% smaller than the actual system font size.
 			// Tahoma 11 is used at 100%
 			if( "Tahoma".equals( font.getFamily() ) )
 				fontSizeDivider = 11f;
-		} else if( SystemInfo.IS_MAC ) {
+		} else if( SystemInfo.isMacOS ) {
 			// default font size on macOS is 13
 			fontSizeDivider = 13f;
-		} else if( SystemInfo.IS_LINUX ) {
+		} else if( SystemInfo.isLinux ) {
 			// default font size for Unity and Gnome is 15 and for KDE it is 13
-			fontSizeDivider = SystemInfo.IS_KDE ? 13f : 15f;
+			fontSizeDivider = SystemInfo.isKDE ? 13f : 15f;
 		}
 
 		return font.getSize() / fontSizeDivider;
 	}
 
 	private static boolean isUserScalingEnabled() {
-		// same as in IntelliJ IDEA
+		return FlatSystemProperties.getBoolean( FlatSystemProperties.UI_SCALE_ENABLED, true );
-		String hidpi = System.getProperty( "hidpi" );
-		return (hidpi != null) ? Boolean.parseBoolean( hidpi ) : true;
 	}
 
 	/**
@@ -204,7 +203,10 @@ public class UIScale
 	 * to the given font.
 	 */
 	public static FontUIResource applyCustomScaleFactor( FontUIResource font ) {
-		String uiScale = System.getProperty( "flatlaf.uiScale" );
+		if( !isUserScalingEnabled() )
+			return font;
+
+		String uiScale = System.getProperty( FlatSystemProperties.UI_SCALE );
 		float scaleFactor = parseScaleFactor( uiScale );
 		if( scaleFactor <= 0 )
 			return font;

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

@@ -21,18 +21,20 @@
 #---- variables ----
 
 @background=#3c3f41
-@foreground=#bbbbbb
+@foreground=#bbb
 @selectionBackground=#4B6EAF
 @selectionForeground=@foreground
 @selectionInactiveBackground=#0D293E
 @selectionInactiveForeground=@foreground
-@disabledText=#777777
+@disabledText=#888
 @textComponentBackground=#45494A
 @menuBackground=darken(@background,5%)
-@menuHoverBackground=lighten(@menuBackground,10%)
+@menuHoverBackground=lighten(@menuBackground,10%,derived)
-@menuCheckBackground=lighten(@menuBackground,10%)
+@menuCheckBackground=lighten(@menuBackground,10%,derived)
-@menuCheckHoverBackground=lighten(@menuBackground,20%)
+@menuCheckHoverBackground=lighten(@menuBackground,20%,derived)
-@cellFocusColor=#000000
+@menuAcceleratorForeground=darken(@foreground,15%)
+@menuAcceleratorSelectionForeground=@selectionForeground
+@cellFocusColor=#000
 @icon=#adadad
 
 # Drop (use lazy colors for IntelliJ platform themes, which usually do not specify these colors)
@@ -42,24 +44,6 @@
 @dropLineShortColor=lighten(List.selectionBackground,30%,lazy)
 
 
-#---- globals ----
-
-*.background=@background
-*.foreground=@foreground
-*.textBackground=@background
-*.textForeground=@foreground
-*.caretForeground=@foreground
-*.inactiveBackground=@background
-*.inactiveForeground=@foreground
-*.selectionBackground=@selectionBackground
-*.selectionForeground=@selectionForeground
-*.disabledBackground=@background
-*.disabledForeground=@disabledText
-*.disabledText=@disabledText
-*.acceleratorForeground=darken(@foreground,15%)
-*.acceleratorSelectionForeground=@selectionForeground
-
-
 #---- system colors ----
 
 activeCaption=#434E60
@@ -72,8 +56,11 @@ controlDkShadow=lighten($controlShadow,10%)
 #---- Button ----
 
 Button.background=#4c5052
-Button.hoverBackground=lighten($Button.background,3%,derived autoInverse)
+Button.hoverBackground=lighten($Button.background,3%,derived)
-Button.pressedBackground=lighten($Button.background,6%,derived autoInverse)
+Button.pressedBackground=lighten($Button.background,6%,derived)
+Button.selectedBackground=lighten($Button.background,10%,derived)
+Button.selectedForeground=@foreground
+Button.disabledSelectedBackground=lighten($Button.background,3%,derived)
 
 Button.borderColor=#5e6060
 Button.disabledBorderColor=#5e6060
@@ -81,44 +68,62 @@ Button.focusedBorderColor=#466d94
 Button.hoverBorderColor=$Button.focusedBorderColor
 
 Button.default.background=#365880
-Button.default.foreground=#bbbbbb
+Button.default.foreground=#bbb
-Button.default.hoverBackground=lighten($Button.default.background,3%,derived autoInverse)
+Button.default.hoverBackground=lighten($Button.default.background,3%,derived)
-Button.default.pressedBackground=lighten($Button.default.background,6%,derived autoInverse)
+Button.default.pressedBackground=lighten($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($Button.background,1%,derived autoInverse)
+Button.toolbar.hoverBackground=lighten($Button.background,1%,derived)
-Button.toolbar.pressedBackground=lighten($Button.background,4%,derived autoInverse)
+Button.toolbar.pressedBackground=lighten($Button.background,4%,derived)
+Button.toolbar.selectedBackground=lighten($Button.background,7%,derived)
 
 
 #---- CheckBox ----
 
+# enabled
 CheckBox.icon.borderColor=#6B6B6B
-CheckBox.icon.disabledBorderColor=#545556
-CheckBox.icon.selectedBorderColor=#6B6B6B
-CheckBox.icon.focusedBorderColor=#466D94
-CheckBox.icon.hoverBorderColor=$CheckBox.icon.focusedBorderColor
-CheckBox.icon.selectedFocusedBorderColor=#466D94
 CheckBox.icon.background=#43494A
-CheckBox.icon.disabledBackground=@background
+CheckBox.icon.selectedBorderColor=$CheckBox.icon.borderColor
-CheckBox.icon.hoverBackground=lighten($CheckBox.icon.background,3%,derived autoInverse)
+CheckBox.icon.selectedBackground=$CheckBox.icon.background
-CheckBox.icon.pressedBackground=lighten($CheckBox.icon.background,6%,derived autoInverse)
-CheckBox.icon.selectedBackground=#43494A
 CheckBox.icon.checkmarkColor=#A7A7A7
+
+# disabled
+CheckBox.icon.disabledBorderColor=#545556
+CheckBox.icon.disabledBackground=@background
 CheckBox.icon.disabledCheckmarkColor=#606060
 
+# focused
+CheckBox.icon.focusedBorderColor=#466D94
+CheckBox.icon.selectedFocusedBorderColor=#466D94
+
+# hover
+CheckBox.icon.hoverBorderColor=$CheckBox.icon.focusedBorderColor
+CheckBox.icon.hoverBackground=lighten($CheckBox.icon.background,3%,derived)
+
+# pressed
+CheckBox.icon.pressedBackground=lighten($CheckBox.icon.background,6%,derived)
+
+# used if CheckBox.icon.style=filled
+# enabled
+CheckBox.icon[filled].selectedBorderColor=$CheckBox.icon.checkmarkColor
+CheckBox.icon[filled].selectedBackground=$CheckBox.icon.checkmarkColor
+CheckBox.icon[filled].checkmarkColor=$CheckBox.icon.background
+# hover
+CheckBox.icon[filled].selectedHoverBackground=darken($CheckBox.icon[filled].selectedBackground,3%)
+# pressed
+CheckBox.icon[filled].selectedPressedBackground=darken($CheckBox.icon[filled].selectedBackground,6%)
+
 
 #---- ComboBox ----
 
-ComboBox.background=@textComponentBackground
-ComboBox.buttonBackground=@textComponentBackground
 ComboBox.buttonEditableBackground=#404445
 ComboBox.buttonArrowColor=#9A9DA1
 ComboBox.buttonDisabledArrowColor=#585858
-ComboBox.buttonHoverArrowColor=#bbbbbb
+ComboBox.buttonHoverArrowColor=#bbb
 
 
 #---- Component ----
@@ -130,6 +135,12 @@ 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 ----
 
@@ -148,20 +159,18 @@ InternalFrame.activeTitleForeground=@foreground
 InternalFrame.inactiveTitleBackground=darken(@background,5%)
 InternalFrame.inactiveTitleForeground=@disabledText
 
-InternalFrame.activeBorderColor=lighten($Component.borderColor,10%)
+InternalFrame.activeBorderColor=darken(@background,7%)
-InternalFrame.inactiveBorderColor=$Component.borderColor
+InternalFrame.inactiveBorderColor=darken(@background,3%)
 
-InternalFrame.buttonHoverBackground=lighten($InternalFrame.activeTitleBackground,10%,derived autoInverse)
+InternalFrame.buttonHoverBackground=lighten($InternalFrame.activeTitleBackground,10%,derived)
-InternalFrame.buttonPressedBackground=lighten($InternalFrame.activeTitleBackground,20%,derived autoInverse)
+InternalFrame.buttonPressedBackground=lighten($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
-#---- List ----
+InternalFrame.inactiveDropShadowOpacity=0.75
-
-List.background=@textComponentBackground
 
 
 #---- Menu ----
@@ -173,7 +182,6 @@ Menu.icon.disabledArrowColor=#606060
 #---- MenuBar ----
 
 MenuBar.borderColor=#515151
-MenuBar.hoverBackground=@menuHoverBackground
 
 
 #---- MenuItemCheckBox ----
@@ -187,6 +195,12 @@ MenuItemCheckBox.icon.disabledCheckmarkColor=#606060
 PasswordField.capsLockIconColor=#ffffff64
 
 
+#---- Popup ----
+
+Popup.dropShadowColor=#000
+Popup.dropShadowOpacity=0.25
+
+
 #---- PopupMenu ----
 
 PopupMenu.borderColor=#5e5e5e
@@ -194,18 +208,27 @@ PopupMenu.borderColor=#5e5e5e
 
 #---- ProgressBar ----
 
-ProgressBar.background=#555555
+ProgressBar.background=#555
 ProgressBar.foreground=#4A88C7
 ProgressBar.selectionForeground=@foreground
 ProgressBar.selectionBackground=@foreground
 
 
+#---- RootPane ----
+
+RootPane.activeBorderColor=darken(@background,7%,derived)
+RootPane.inactiveBorderColor=darken(@background,5%,derived)
+
+
 #---- ScrollBar ----
 
-ScrollBar.track=#3F4244
+ScrollBar.track=lighten(@background,1%,derived noAutoInverse)
-ScrollBar.thumb=lighten($ScrollBar.track,10%)
+ScrollBar.thumb=lighten($ScrollBar.track,10%,derived noAutoInverse)
-ScrollBar.hoverTrackColor=lighten($ScrollBar.track,4%)
+ScrollBar.hoverTrackColor=lighten($ScrollBar.track,4%,derived noAutoInverse)
-ScrollBar.hoverThumbColor=lighten($ScrollBar.thumb,10%)
+ScrollBar.hoverThumbColor=lighten($ScrollBar.thumb,10%,derived noAutoInverse)
+ScrollBar.pressedThumbColor=lighten($ScrollBar.thumb,15%,derived noAutoInverse)
+ScrollBar.hoverButtonBackground=lighten(@background,5%,derived noAutoInverse)
+ScrollBar.pressedButtonBackground=lighten(@background,10%,derived noAutoInverse)
 
 
 #---- Separator ----
@@ -217,8 +240,8 @@ Separator.foreground=#515151
 
 Slider.trackColor=#646464
 Slider.thumbColor=#A6A6A6
-Slider.tickColor=#888888
+Slider.tickColor=#888
-Slider.hoverColor=darken($Slider.thumbColor,15%,derived autoInverse)
+Slider.hoverColor=darken($Slider.thumbColor,15%,derived)
 Slider.disabledForeground=#4c5052
 
 
@@ -230,7 +253,6 @@ SplitPaneDivider.oneTouchHoverArrowColor=#7A7D81
 
 #---- TabbedPane ----
 
-TabbedPane.disabledForeground=@disabledText
 TabbedPane.underlineColor=#4A88C7
 TabbedPane.disabledUnderlineColor=#7a7a7a
 TabbedPane.hoverColor=#2e3133
@@ -240,24 +262,28 @@ TabbedPane.contentAreaColor=#323232
 
 #---- Table ----
 
-Table.background=@textComponentBackground
 Table.gridColor=lighten($Table.background,3%)
 
 
 #---- TableHeader ----
 
-TableHeader.background=@textComponentBackground
 TableHeader.separatorColor=lighten($TableHeader.background,10%)
 TableHeader.bottomSeparatorColor=$TableHeader.separatorColor
 
 
+#---- TitlePane ----
+
+TitlePane.embeddedForeground=darken($TitlePane.foreground,15%)
+TitlePane.buttonHoverBackground=lighten($TitlePane.background,10%,derived)
+TitlePane.buttonPressedBackground=lighten($TitlePane.background,20%,derived)
+
+
 #---- ToggleButton ----
 
-ToggleButton.selectedBackground=lighten($ToggleButton.background,10%,derived autoInverse)
+ToggleButton.selectedBackground=lighten($ToggleButton.background,10%,derived)
-ToggleButton.selectedForeground=@foreground
+ToggleButton.disabledSelectedBackground=lighten($ToggleButton.background,3%,derived)
-ToggleButton.disabledSelectedBackground=lighten($ToggleButton.background,3%,derived autoInverse)
 
-ToggleButton.toolbar.selectedBackground=lighten($ToggleButton.background,7%,derived autoInverse)
+ToggleButton.toolbar.selectedBackground=lighten($ToggleButton.background,7%,derived)
 
 
 #---- ToolTip ----
@@ -268,5 +294,4 @@ ToolTip.background=#1e2123
 
 #---- Tree ----
 
-Tree.background=@textComponentBackground
 Tree.hash=#505355

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

@@ -23,7 +23,7 @@
 Button.focusedBackground=null
 
 Button.default.background=#4D8AC9
-Button.default.foreground=#FFFFFF
+Button.default.foreground=#fff
 Button.default.focusedBackground=null
 Button.default.borderColor=#3D75B2
 Button.default.hoverBorderColor=#A9C9F5
@@ -35,22 +35,12 @@ Button.default.borderWidth=1
 
 #---- CheckBox ----
 
-CheckBox.icon.selectedBorderColor=#4B97D9
+CheckBox.icon.style=filled
-CheckBox.icon.selectedFocusedBorderColor=#ACCFF7
-CheckBox.icon.selectedBackground=#4F9EE3
-CheckBox.icon.checkmarkColor=#FFFFFF
-
-CheckBox.icon.selectedHoverBackground=#5E94CE
-CheckBox.icon.selectedPressedBackground=#72A1D4
 
 
 #---- Component ----
 
 Component.focusWidth=2
 Component.innerFocusWidth=0
+Component.innerOutlineWidth=0
 Component.arrowType=triangle
-
-
-#---- RadioButton ----
-
-RadioButton.icon.centerDiameter=5

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

@@ -67,6 +67,22 @@ ViewportUI=com.formdev.flatlaf.ui.FlatViewportUI
 @menuItemMargin=3,6,3,6
 
 
+#---- globals ----
+
+*.background=@background
+*.foreground=@foreground
+*.caretForeground=@foreground
+*.inactiveBackground=@background
+*.inactiveForeground=@disabledText
+*.selectionBackground=@selectionBackground
+*.selectionForeground=@selectionForeground
+*.disabledBackground=@background
+*.disabledForeground=@disabledText
+*.disabledText=@disabledText
+*.acceleratorForeground=@menuAcceleratorForeground
+*.acceleratorSelectionForeground=@menuAcceleratorSelectionForeground
+
+
 #---- system colors ----
 
 desktop=@textComponentBackground
@@ -135,6 +151,7 @@ Button.rollover=true
 Button.defaultButtonFollowsFocus=false
 [win]Button.defaultButtonFollowsFocus=true
 
+Button.borderWidth=1
 Button.default.borderWidth=1
 
 Button.toolbar.margin=3,3,3,3
@@ -178,13 +195,20 @@ ColorChooser.swatchesDefaultRecentColor=$control
 
 ComboBox.border=com.formdev.flatlaf.ui.FlatRoundBorder
 ComboBox.padding=2,6,2,6
+ComboBox.minimumWidth=72
+ComboBox.editorColumns=0
+ComboBox.maximumRowCount=15
 [mac]ComboBox.showPopupOnNavigation=true
+ComboBox.buttonStyle=auto
+ComboBox.background=@textComponentBackground
+ComboBox.buttonBackground=@textComponentBackground
 
 
 #---- Component ----
 
 Component.focusWidth=0
 Component.innerFocusWidth={float}0.5
+Component.innerOutlineWidth={float}1
 Component.arc=5
 Component.minimumWidth=64
 Component.arrowType=chevron
@@ -258,9 +282,16 @@ 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 ----
 
@@ -275,11 +306,13 @@ List.cellFocusColor=@cellFocusColor
 List.cellNoFocusBorder=com.formdev.flatlaf.ui.FlatListCellBorder$Default
 List.focusCellHighlightBorder=com.formdev.flatlaf.ui.FlatListCellBorder$Focused
 List.focusSelectedCellHighlightBorder=com.formdev.flatlaf.ui.FlatListCellBorder$Selected
+List.background=@textComponentBackground
 List.selectionInactiveBackground=@selectionInactiveBackground
 List.selectionInactiveForeground=@selectionInactiveForeground
 List.dropCellBackground=@dropCellBackground
 List.dropCellForeground=@dropCellForeground
 List.dropLineColor=@dropLineColor
+List.showCellFocusIndicator=false
 
 
 #---- Menu ----
@@ -299,6 +332,7 @@ Menu.background=@menuBackground
 
 MenuBar.border=com.formdev.flatlaf.ui.FlatMenuBarBorder
 MenuBar.background=@menuBackground
+MenuBar.hoverBackground=@menuHoverBackground
 MenuBar.itemMargins=3,8,3,8
 
 
@@ -359,9 +393,16 @@ PasswordField.margin=@textComponentMargin
 PasswordField.background=@textComponentBackground
 PasswordField.placeholderForeground=@disabledText
 PasswordField.echoChar=\u2022
+PasswordField.showCapsLock=true
 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
@@ -391,6 +432,7 @@ ProgressBar.repaintInterval=15
 RadioButton.border=com.formdev.flatlaf.ui.FlatMarginBorder
 RadioButton.icon=com.formdev.flatlaf.icons.FlatRadioButtonIcon
 RadioButton.icon.centerDiameter=8
+RadioButton.icon[filled].centerDiameter=5
 RadioButton.margin=2,2,2,2
 RadioButton.iconTextGap=4
 RadioButton.rollover=true
@@ -407,15 +449,41 @@ RadioButtonMenuItem.borderPainted=true
 RadioButtonMenuItem.background=@menuBackground
 
 
+#---- RootPane ----
+
+RootPane.border=com.formdev.flatlaf.ui.FlatRootPaneUI$FlatWindowBorder
+RootPane.borderDragThickness=5
+RootPane.cornerDragWidth=16
+RootPane.honorFrameMinimumSizeOnResize=false
+RootPane.honorDialogMinimumSizeOnResize=true
+
+
 #---- ScrollBar ----
 
 ScrollBar.width=10
+ScrollBar.minimumThumbSize=10,10
+ScrollBar.maximumThumbSize=100000,100000
+ScrollBar.trackInsets=0,0,0,0
+ScrollBar.thumbInsets=0,0,0,0
+ScrollBar.trackArc=0
+ScrollBar.thumbArc=0
+ScrollBar.hoverThumbWithTrack=false
+ScrollBar.pressedThumbWithTrack=false
 ScrollBar.showButtons=false
 ScrollBar.squareButtons=false
 ScrollBar.buttonArrowColor=$ComboBox.buttonArrowColor
 ScrollBar.buttonDisabledArrowColor=$ComboBox.buttonDisabledArrowColor
 ScrollBar.allowsAbsolutePositioning=true
 
+[mac]ScrollBar.minimumThumbSize=18,18
+[mac]ScrollBar.thumbInsets=2,2,2,2
+[mac]ScrollBar.thumbArc=999
+[mac]ScrollBar.hoverThumbWithTrack=true
+
+[linux]ScrollBar.minimumThumbSize=18,18
+[linux]ScrollBar.thumbInsets=2,2,2,2
+[linux]ScrollBar.thumbArc=999
+
 
 #---- ScrollPane ----
 
@@ -449,6 +517,7 @@ Spinner.buttonDisabledArrowColor=$ComboBox.buttonDisabledArrowColor
 Spinner.buttonHoverArrowColor=$ComboBox.buttonHoverArrowColor
 Spinner.padding=@textComponentMargin
 Spinner.editorBorderPainted=false
+Spinner.buttonStyle=button
 
 
 #---- SplitPane ----
@@ -475,6 +544,7 @@ TabbedPane.tabAreaInsets=0,0,0,0
 TabbedPane.selectedTabPadInsets=0,0,0,0
 TabbedPane.tabRunOverlay=0
 TabbedPane.tabsOverlapBorder=true
+TabbedPane.disabledForeground=@disabledText
 TabbedPane.shadow=@background
 TabbedPane.contentBorderInsets=null
 
@@ -484,6 +554,7 @@ TabbedPane.contentBorderInsets=null
 Table.rowHeight=20
 Table.showHorizontalLines=false
 Table.showVerticalLines=false
+Table.consistentHomeEndKeyBehavior=true
 Table.intercellSpacing={dimension}0,0
 Table.scrollPaneBorder=com.formdev.flatlaf.ui.FlatBorder
 Table.ascendingSortIcon=com.formdev.flatlaf.icons.FlatAscendingSortIcon
@@ -496,6 +567,7 @@ Table.focusCellHighlightBorder=com.formdev.flatlaf.ui.FlatTableCellBorder$Focuse
 Table.focusSelectedCellHighlightBorder=com.formdev.flatlaf.ui.FlatTableCellBorder$Selected
 Table.focusCellBackground=@textComponentBackground
 Table.focusCellForeground=@foreground
+Table.background=@textComponentBackground
 Table.selectionInactiveBackground=@selectionInactiveBackground
 Table.selectionInactiveForeground=@selectionInactiveForeground
 Table.dropCellBackground=@dropCellBackground
@@ -509,6 +581,7 @@ Table.dropLineShortColor=@dropLineShortColor
 TableHeader.height=25
 TableHeader.cellBorder=2,3,2,3
 TableHeader.focusCellBackground=$TableHeader.background
+TableHeader.background=@textComponentBackground
 
 
 #---- TextArea ----
@@ -546,6 +619,31 @@ TitledBorder.titleColor=@foreground
 TitledBorder.border=1,1,1,1,$Separator.foreground
 
 
+#---- TitlePane ----
+
+TitlePane.menuBarEmbedded=true
+TitlePane.iconSize=16,16
+TitlePane.iconMargins=3,8,3,0
+TitlePane.menuBarMargins=0,8,0,22
+TitlePane.titleMargins=3,8,3,8
+TitlePane.buttonSize=44,30
+TitlePane.buttonMaximizedHeight=22
+TitlePane.closeIcon=com.formdev.flatlaf.icons.FlatWindowCloseIcon
+TitlePane.iconifyIcon=com.formdev.flatlaf.icons.FlatWindowIconifyIcon
+TitlePane.maximizeIcon=com.formdev.flatlaf.icons.FlatWindowMaximizeIcon
+TitlePane.restoreIcon=com.formdev.flatlaf.icons.FlatWindowRestoreIcon
+
+TitlePane.background=$MenuBar.background
+TitlePane.inactiveBackground=$TitlePane.background
+TitlePane.foreground=@foreground
+TitlePane.inactiveForeground=@disabledText
+
+TitlePane.closeHoverBackground=#e81123
+TitlePane.closePressedBackground=rgba($TitlePane.closeHoverBackground,60%)
+TitlePane.closeHoverForeground=#fff
+TitlePane.closePressedForeground=#fff
+
+
 #---- ToggleButton ----
 
 ToggleButton.border=com.formdev.flatlaf.ui.FlatButtonBorder
@@ -555,6 +653,7 @@ ToggleButton.rollover=true
 
 ToggleButton.background=$Button.background
 ToggleButton.pressedBackground=$Button.pressedBackground
+ToggleButton.selectedForeground=@foreground
 
 ToggleButton.toolbar.hoverBackground=$Button.toolbar.hoverBackground
 ToggleButton.toolbar.pressedBackground=$Button.toolbar.pressedBackground
@@ -594,9 +693,12 @@ ToolTipManager.enableToolTipMode=activeApplication
 #---- Tree ----
 
 Tree.border=1,1,1,1
+Tree.editorBorder=1,1,1,1,@cellFocusColor
+Tree.background=@textComponentBackground
 Tree.selectionInactiveBackground=@selectionInactiveBackground
 Tree.selectionInactiveForeground=@selectionInactiveForeground
 Tree.textBackground=$Tree.background
+Tree.textForeground=$Tree.foreground
 Tree.selectionBorderColor=@cellFocusColor
 Tree.dropCellBackground=@dropCellBackground
 Tree.dropCellForeground=@dropCellForeground
@@ -606,6 +708,7 @@ Tree.rendererMargins=1,2,1,2
 Tree.wideSelection=true
 Tree.repaintWholeRow=true
 Tree.paintLines=false
+Tree.showCellFocusIndicator=false
 Tree.leftChildIndent=7
 Tree.rightChildIndent=11
 Tree.rowHeight=0