Theme Editor: added "live" preview

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

@@ -35,6 +35,7 @@ import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.MissingResourceException;
 import java.util.Properties;
@@ -66,6 +67,7 @@ import javax.swing.text.html.HTMLEditorKit;
 import com.formdev.flatlaf.ui.FlatNativeWindowBorder;
 import com.formdev.flatlaf.ui.FlatPopupFactory;
 import com.formdev.flatlaf.ui.FlatRootPaneUI;
+import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.GrayFilter;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.MultiResolutionImageSupport;
@@ -96,6 +98,7 @@ public abstract class FlatLaf
 	private MnemonicHandler mnemonicHandler;
 
 	private Consumer<UIDefaults> postInitialization;
+	private List<Function<Object, Object>> uiDefaultsGetters;
 
 	/**
 	 * Sets the application look and feel to the given LaF
@@ -356,7 +359,7 @@ public abstract class FlatLaf
 	public UIDefaults getDefaults() {
 		// use larger initial capacity to avoid resizing UI defaults hash table
 		// (from 610 to 1221 to 2443 entries) and to save some memory
-		UIDefaults defaults = new UIDefaults( 1500, 0.75f );
+		UIDefaults defaults = new FlatUIDefaults( 1500, 0.75f );
 
 		// initialize basic defaults (see super.getDefaults())
 		initClassDefaults( defaults );
@@ -921,6 +924,104 @@ public abstract class FlatLaf
 		return super.hashCode();
 	}
 
+	/**
+	 * Registers a UI defaults getter function that is invoked before the standard getter.
+	 * This allows using different UI defaults for special purposes
+	 * (e.g. using multiple themes at the same time).
+	 *
+	 * @see #unregisterUIDefaultsGetter(Function)
+	 * @see #runWithUIDefaultsGetter(Function, Runnable)
+	 * @since 1.6
+	 */
+	public void registerUIDefaultsGetter( Function<Object, Object> uiDefaultsGetter ) {
+		if( uiDefaultsGetters == null )
+			uiDefaultsGetters = new ArrayList<>();
+
+		uiDefaultsGetters.remove( uiDefaultsGetter );
+		uiDefaultsGetters.add( uiDefaultsGetter );
+
+		// disable shared UIs
+		FlatUIUtils.setUseSharedUIs( false );
+	}
+
+	/**
+	 * Unregisters a UI defaults getter function that was invoked before the standard getter.
+	 *
+	 * @see #registerUIDefaultsGetter(Function)
+	 * @see #runWithUIDefaultsGetter(Function, Runnable)
+	 * @since 1.6
+	 */
+	public void unregisterUIDefaultsGetter( Function<Object, Object> uiDefaultsGetter ) {
+		if( uiDefaultsGetters == null )
+			return;
+
+		uiDefaultsGetters.remove( uiDefaultsGetter );
+
+		// enable shared UIs
+		if( uiDefaultsGetters.isEmpty() )
+			FlatUIUtils.setUseSharedUIs( true );
+	}
+
+	/**
+	 * Registers a UI defaults getter function that is invoked before the standard getter,
+	 * runs the given runnable and unregisters the UI defaults getter function again.
+	 * This allows using different UI defaults for special purposes
+	 * (e.g. using multiple themes at the same time).
+	 * If the current look and feel is not FlatLaf, then the getter is ignored and
+	 * the given runnable invoked.
+	 *
+	 * @see #registerUIDefaultsGetter(Function)
+	 * @see #unregisterUIDefaultsGetter(Function)
+	 * @since 1.6
+	 */
+	public static void runWithUIDefaultsGetter( Function<Object, Object> uiDefaultsGetter, Runnable runnable ) {
+		LookAndFeel laf = UIManager.getLookAndFeel();
+		if( laf instanceof FlatLaf ) {
+			((FlatLaf)laf).registerUIDefaultsGetter( uiDefaultsGetter );
+			try {
+				runnable.run();
+			} finally {
+				((FlatLaf)laf).unregisterUIDefaultsGetter( uiDefaultsGetter );
+			}
+		} else
+			runnable.run();
+	}
+
+	//---- class FlatUIDefaults -----------------------------------------------
+
+	private class FlatUIDefaults
+		extends UIDefaults
+	{
+		FlatUIDefaults( int initialCapacity, float loadFactor ) {
+			super( initialCapacity, loadFactor );
+		}
+
+		@Override
+		public Object get( Object key ) {
+			Object value = getValue( key );
+			return (value != null) ? value : super.get( key );
+		}
+
+		@Override
+		public Object get( Object key, Locale l ) {
+			Object value = getValue( key );
+			return (value != null) ? value : super.get( key, l );
+		}
+
+		private Object getValue( Object key ) {
+			if( uiDefaultsGetters == null )
+				return null;
+
+			for( int i = uiDefaultsGetters.size() - 1; i >= 0; i-- ) {
+				Object value = uiDefaultsGetters.get( i ).apply( key );
+				if( value != null )
+					return value;
+			}
+
+			return null;
+		}
+	}
+
 	//---- class ActiveFont ---------------------------------------------------
 
 	private static class ActiveFont

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

@@ -69,6 +69,7 @@ public class FlatUIUtils
 {
 	public static final boolean MAC_USE_QUARTZ = Boolean.getBoolean( "apple.awt.graphics.UseQuartz" );
 
+	private static boolean useSharedUIs = true;
 	private static WeakHashMap<LookAndFeel, IdentityHashMap<Object, ComponentUI>> sharedUIinstances = new WeakHashMap<>();
 
 	public static Rectangle addInsets( Rectangle r, Insets insets ) {
@@ -825,6 +826,27 @@ debug*/
 		return explicitlySet;
 	}
 
+	/**
+	 * Returns whether shared UI delegates are used.
+	 *
+	 * @since 1.6
+	 */
+	public static boolean isUseSharedUIs() {
+		return useSharedUIs;
+	}
+
+	/**
+	 * Specifies whether shared UI delegates are used.
+	 * This does not change already existing UI delegates.
+	 *
+	 * @since 1.6
+	 */
+	public static boolean setUseSharedUIs( boolean useSharedUIs ) {
+		boolean old = FlatUIUtils.useSharedUIs;
+		FlatUIUtils.useSharedUIs = useSharedUIs;
+		return old;
+	}
+
 	/**
 	 * Creates a shared component UI for the given key and the current Laf.
 	 * Each Laf instance has its own shared component UI instance.
@@ -833,6 +855,9 @@ debug*/
 	 * may use multiple Laf instances at the same time.
 	 */
 	public static ComponentUI createSharedUI( Object key, Supplier<ComponentUI> newInstanceSupplier ) {
+		if( !useSharedUIs )
+			return newInstanceSupplier.get();
+
 		return sharedUIinstances
 			.computeIfAbsent( UIManager.getLookAndFeel(), k -> new IdentityHashMap<>() )
 			.computeIfAbsent( key, k -> newInstanceSupplier.get() );

flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatThemeEditorPane.java

@@ -30,6 +30,7 @@ import javax.swing.JFrame;
 import javax.swing.JLayer;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JScrollPane;
 import javax.swing.KeyStroke;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
@@ -67,6 +68,8 @@ class FlatThemeEditorPane
 	private final FlatSyntaxTextArea textArea;
 	private final ErrorStrip errorStrip;
 	private FlatFindReplaceBar findReplaceBar;
+	private JScrollPane previewScrollPane;
+	private FlatThemePreview preview;
 
 	private File file;
 
@@ -260,6 +263,30 @@ class FlatThemeEditorPane
 		collapsiblePanel.showBottomComponent( findReplaceBar );
 	}
 
+	void showPreview( boolean show ) {
+		if( show ) {
+			if( preview != null )
+				return;
+
+			preview = new FlatThemePreview( textArea );
+			previewScrollPane = new JScrollPane( preview );
+			previewScrollPane.setHorizontalScrollBarPolicy( JScrollPane.HORIZONTAL_SCROLLBAR_NEVER );
+			previewScrollPane.setBorder( null );
+			previewScrollPane.getVerticalScrollBar().setUnitIncrement( 20 );
+			previewScrollPane.getHorizontalScrollBar().setUnitIncrement( 20 );
+			add( previewScrollPane, BorderLayout.LINE_END );
+		} else {
+			if( preview == null )
+				return;
+
+			remove( previewScrollPane );
+			previewScrollPane = null;
+			preview = null;
+		}
+
+		revalidate();
+	}
+
 	//---- class FlatSyntaxScheme ---------------------------------------------
 
 	private static class FlatSyntaxScheme

flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatThemeFileEditor.java

@@ -61,6 +61,7 @@ public class FlatThemeFileEditor
 	private static final String KEY_RECENT_DIRECTORY = "recentDirectory";
 	private static final String KEY_RECENT_FILE = "recentFile";
 	private static final String KEY_WINDOW_BOUNDS = "windowBounds";
+	private static final String KEY_PREVIEW = "preview";
 	private static final String KEY_LAF = "laf";
 	private static final String KEY_FONT_SIZE_INCR = "fontSizeIncr";
 
@@ -281,6 +282,9 @@ public class FlatThemeFileEditor
 				tabbedPane.setTitleAt( index, titleFun.get() );
 		} );
 
+		if( state.getBoolean( KEY_PREVIEW, true ) )
+			themeEditorPane.showPreview( true );
+
 		tabbedPane.addTab( titleFun.get(), null, themeEditorPane, file.getAbsolutePath() );
 
 		if( select )
@@ -350,6 +354,13 @@ public class FlatThemeFileEditor
 			themeEditorPane.showFindReplaceBar();
 	}
 
+	private void showHidePreview() {
+		boolean show = previewMenuItem.isSelected();
+		for( FlatThemeEditorPane themeEditorPane : getThemeEditorPanes() )
+			themeEditorPane.showPreview( show );
+		state.putBoolean( KEY_PREVIEW, show );
+	}
+
 	private void lightLaf() {
 		applyLookAndFeel( FlatLightLaf.class.getName() );
 	}
@@ -407,6 +418,8 @@ public class FlatThemeFileEditor
 		String[] directories = getPrefsStrings( state, KEY_DIRECTORIES );
 		SortedComboBoxModel<String> model = new SortedComboBoxModel<>( directories );
 		directoryField.setModel( model );
+
+		previewMenuItem.setSelected( state.getBoolean( KEY_PREVIEW, true ) );
 	}
 
 	private void saveState() {
@@ -505,6 +518,7 @@ public class FlatThemeFileEditor
 		editMenu = new JMenu();
 		findMenuItem = new JMenuItem();
 		viewMenu = new JMenu();
+		previewMenuItem = new JCheckBoxMenuItem();
 		lightLafMenuItem = new JRadioButtonMenuItem();
 		darkLafMenuItem = new JRadioButtonMenuItem();
 		incrFontSizeMenuItem = new JMenuItem();
@@ -589,6 +603,13 @@ public class FlatThemeFileEditor
 				viewMenu.setText("View");
 				viewMenu.setMnemonic('V');
 
+				//---- previewMenuItem ----
+				previewMenuItem.setText("Preview");
+				previewMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, KeyEvent.CTRL_DOWN_MASK));
+				previewMenuItem.addActionListener(e -> showHidePreview());
+				viewMenu.add(previewMenuItem);
+				viewMenu.addSeparator();
+
 				//---- lightLafMenuItem ----
 				lightLafMenuItem.setText("Light Laf");
 				lightLafMenuItem.setMnemonic('L');
@@ -684,10 +705,10 @@ public class FlatThemeFileEditor
 		}
 		contentPane.add(tabbedPane, BorderLayout.CENTER);
 
-		//---- buttonGroup1 ----
+		//---- lafButtonGroup ----
-		ButtonGroup buttonGroup1 = new ButtonGroup();
+		ButtonGroup lafButtonGroup = new ButtonGroup();
-		buttonGroup1.add(lightLafMenuItem);
+		lafButtonGroup.add(lightLafMenuItem);
-		buttonGroup1.add(darkLafMenuItem);
+		lafButtonGroup.add(darkLafMenuItem);
 		// JFormDesigner - End of component initialization  //GEN-END:initComponents
 	}
 
@@ -700,6 +721,7 @@ public class FlatThemeFileEditor
 	private JMenu editMenu;
 	private JMenuItem findMenuItem;
 	private JMenu viewMenu;
+	private JCheckBoxMenuItem previewMenuItem;
 	private JRadioButtonMenuItem lightLafMenuItem;
 	private JRadioButtonMenuItem darkLafMenuItem;
 	private JMenuItem incrFontSizeMenuItem;

flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatThemeFileEditor.jfd

@@ -99,10 +99,19 @@ new FormModel {
 					name: "viewMenu"
 					"text": "View"
 					"mnemonic": 86
+					add( new FormComponent( "javax.swing.JCheckBoxMenuItem" ) {
+						name: "previewMenuItem"
+						"text": "Preview"
+						"accelerator": static javax.swing.KeyStroke getKeyStroke( 80, 130, false )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showHidePreview", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JPopupMenu$Separator" ) {
+						name: "separator3"
+					} )
 					add( new FormComponent( "javax.swing.JRadioButtonMenuItem" ) {
 						name: "lightLafMenuItem"
 						"text": "Light Laf"
-						"$buttonGroup": new FormReference( "buttonGroup1" )
+						"$buttonGroup": new FormReference( "lafButtonGroup" )
 						"mnemonic": 76
 						"selected": true
 						"accelerator": static javax.swing.KeyStroke getKeyStroke( 122, 0, false )
@@ -111,7 +120,7 @@ new FormModel {
 					add( new FormComponent( "javax.swing.JRadioButtonMenuItem" ) {
 						name: "darkLafMenuItem"
 						"text": "Dark Laf"
-						"$buttonGroup": new FormReference( "buttonGroup1" )
+						"$buttonGroup": new FormReference( "lafButtonGroup" )
 						"mnemonic": 68
 						"accelerator": static javax.swing.KeyStroke getKeyStroke( 123, 0, false )
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "darkLaf", false ) )
@@ -163,7 +172,7 @@ new FormModel {
 			"size": new java.awt.Dimension( 535, 300 )
 		} )
 		add( new FormNonVisual( "javax.swing.ButtonGroup" ) {
-			name: "buttonGroup1"
+			name: "lafButtonGroup"
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 310 )
 		} )

flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatThemePreview.java

@@ -0,0 +1,649 @@
+/*
+/*
+ * Copyright 2021 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.themeeditor;
+
+import java.awt.*;
+import java.awt.event.HierarchyEvent;
+import javax.swing.*;
+import javax.swing.UIDefaults.ActiveValue;
+import javax.swing.UIDefaults.LazyValue;
+import javax.swing.event.DocumentEvent;
+import javax.swing.event.DocumentListener;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.extras.components.*;
+import net.miginfocom.swing.*;
+
+/**
+ * @author Karl Tauber
+ */
+class FlatThemePreview
+	extends JPanel
+	implements DocumentListener
+{
+	private final FlatSyntaxTextArea textArea;
+	private final Timer timer;
+
+	FlatThemePreview( FlatSyntaxTextArea textArea ) {
+		this.textArea = textArea;
+
+		initComponents();
+
+		tabbedPane1.setTabLayoutPolicy( JTabbedPane.SCROLL_TAB_LAYOUT );
+		tabbedPane1.addTab( "Tab 1", null );
+		tabbedPane1.addTab( "Tab 2", null );
+		tabbedPane1.addTab( "Tab 3", null );
+		tabbedPane1.addTab( "Tab 4", null );
+		tabbedPane1.addTab( "Tab 5", null );
+		tabbedPane1.addTab( "Tab 6", null );
+		tabbedPane1.addTab( "Tab 7", null );
+		tabbedPane1.addTab( "Tab 8", null );
+
+		// timer used for delayed preview updates
+		timer = new Timer( 500, e -> update() );
+		timer.setRepeats( false );
+
+		// listen to changes in text area to automatically update preview
+		textArea.getDocument().addDocumentListener( this );
+
+		// update when showing preview (e.g. activating tab)
+		addHierarchyListener( e -> {
+			if( (e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0 && isShowing() )
+				EventQueue.invokeLater( this::update );
+		} );
+	}
+
+	@Override
+	public void insertUpdate( DocumentEvent e ) {
+		timer.restart();
+	}
+
+	@Override
+	public void removeUpdate( DocumentEvent e ) {
+		timer.restart();
+	}
+
+	@Override
+	public void changedUpdate( DocumentEvent e ) {
+	}
+
+	private void update() {
+		if( !isShowing() )
+			return;
+
+		FlatLaf.runWithUIDefaultsGetter( this::getUIDefaultProperty, this::updateComponentTreeUI );
+	}
+
+	private void updateComponentTreeUI() {
+		try {
+			SwingUtilities.updateComponentTreeUI( this );
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+		}
+	}
+
+	private Object getUIDefaultProperty( Object key ) {
+		if( !(key instanceof String) )
+			return null;
+
+		Object value = textArea.propertiesSupport.getParsedProperty( (String) key );
+		if( value instanceof LazyValue )
+			value = ((LazyValue)value).createValue( null );
+		else if( value instanceof ActiveValue )
+			value = ((ActiveValue)value).createValue( null );
+
+//		System.out.println( key + " = " + value );
+		return value;
+	}
+
+	@SuppressWarnings( "deprecation" )
+	@Override
+	public void layout() {
+		try {
+			super.layout();
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+		}
+	}
+
+	@Override
+	protected void validateTree() {
+		try {
+			super.validateTree();
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+		}
+	}
+
+	@Override
+	public Dimension getPreferredSize() {
+		try {
+			return super.getPreferredSize();
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+			return new Dimension( 100, 100 );
+		}
+	}
+
+	@Override
+	public Dimension getMinimumSize() {
+		try {
+			return super.getMinimumSize();
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+			return new Dimension( 100, 100 );
+		}
+	}
+
+	@Override
+	public Dimension getMaximumSize() {
+		try {
+			return super.getMaximumSize();
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+			return new Dimension( Short.MAX_VALUE, Short.MAX_VALUE );
+		}
+	}
+
+	@Override
+	public void paint( Graphics g ) {
+		try {
+			super.paint( g );
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+		}
+	}
+
+	@Override
+	protected void paintComponent( Graphics g ) {
+		try {
+			super.paintComponent( g );
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+		}
+	}
+
+	@Override
+	protected void paintChildren( Graphics g ) {
+		try {
+			super.paintChildren( g );
+		} catch( Exception ex ) {
+			ex.printStackTrace();
+		}
+	}
+
+	private void enabledChanged() {
+		FlatLaf.runWithUIDefaultsGetter( this::getUIDefaultProperty, () -> {
+			enableDisable( this, enabledCheckBox.isSelected() );
+		} );
+	}
+
+	private void enableDisable( Component comp, boolean enabled ) {
+		comp.setEnabled( enabled );
+
+		if( !(comp instanceof Container) )
+			return;
+
+		for( Component c : ((Container)comp).getComponents() ) {
+			if( c == enabledCheckBox || c == previewLabel )
+				continue;
+
+			if( c instanceof JScrollPane )
+				c = ((JScrollPane)c).getViewport().getView();
+
+			enableDisable( c, enabled );
+		}
+	}
+
+	private void changeProgress() {
+		int value = slider3.getValue();
+		progressBar1.setValue( value );
+	}
+
+	private void initComponents() {
+		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
+		previewLabel = new JLabel();
+		enabledCheckBox = new JCheckBox();
+		separator2 = new JSeparator();
+		labelLabel = new JLabel();
+		label1 = new JLabel();
+		flatButton1 = new FlatButton();
+		buttonLabel = new JLabel();
+		button1 = new JButton();
+		testDefaultButton1 = new FlatThemePreview.TestDefaultButton();
+		helpButton = new FlatButton();
+		hSpacer2 = new JPanel(null);
+		toggleButtonLabel = new JLabel();
+		toggleButton1 = new JToggleButton();
+		toggleButton3 = new JToggleButton();
+		hSpacer1 = new JPanel(null);
+		checkBoxLabel = new JLabel();
+		checkBox1 = new JCheckBox();
+		checkBox3 = new JCheckBox();
+		hSpacer3 = new JPanel(null);
+		radioButtonLabel = new JLabel();
+		radioButton1 = new JRadioButton();
+		radioButton3 = new JRadioButton();
+		hSpacer4 = new JPanel(null);
+		comboBoxLabel = new JLabel();
+		comboBox1 = new FlatComboBox<>();
+		comboBox3 = new JComboBox<>();
+		spinnerLabel = new JLabel();
+		spinner1 = new JSpinner();
+		textFieldLabel = new JLabel();
+		textField1 = new FlatTextField();
+		formattedTextFieldLabel = new JLabel();
+		formattedTextField1 = new FlatFormattedTextField();
+		passwordFieldLabel = new JLabel();
+		passwordField1 = new FlatPasswordField();
+		textAreaLabel = new JLabel();
+		scrollPane1 = new JScrollPane();
+		textArea1 = new JTextArea();
+		editorPaneLabel = new JLabel();
+		scrollPane5 = new JScrollPane();
+		editorPane1 = new JEditorPane();
+		textPaneLabel = new JLabel();
+		scrollPane9 = new JScrollPane();
+		textPane1 = new JTextPane();
+		scrollBarLabel = new JLabel();
+		scrollBar1 = new JScrollBar();
+		scrollBar5 = new FlatScrollBar();
+		separatorLabel = new JLabel();
+		separator1 = new JSeparator();
+		sliderLabel = new JLabel();
+		slider1 = new JSlider();
+		slider3 = new JSlider();
+		progressBarLabel = new JLabel();
+		progressBar1 = new FlatProgressBar();
+		toolTipLabel = new JLabel();
+		toolTip1 = new JToolTip();
+		tabbedPaneLabel = new JLabel();
+		tabbedPane1 = new JTabbedPane();
+
+		//======== this ========
+		setLayout(new MigLayout(
+			"insets dialog,hidemode 3",
+			// columns
+			"[fill]" +
+			"[130,fill]",
+			// rows
+			"[]0" +
+			"[]unrel" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[grow]"));
+
+		//---- previewLabel ----
+		previewLabel.setText("Preview");
+		previewLabel.setFont(previewLabel.getFont().deriveFont(previewLabel.getFont().getSize() + 6f));
+		add(previewLabel, "cell 0 0 2 1,alignx left,growx 0");
+
+		//---- enabledCheckBox ----
+		enabledCheckBox.setText("Enabled");
+		enabledCheckBox.setSelected(true);
+		enabledCheckBox.addActionListener(e -> enabledChanged());
+		add(enabledCheckBox, "cell 0 0 2 1,align right top,grow 0 0");
+		add(separator2, "cell 0 1 2 1");
+
+		//---- labelLabel ----
+		labelLabel.setText("JLabel:");
+		add(labelLabel, "cell 0 2");
+
+		//---- label1 ----
+		label1.setText("Some Text");
+		add(label1, "cell 1 2");
+
+		//---- flatButton1 ----
+		flatButton1.setText("Help");
+		flatButton1.setButtonType(FlatButton.ButtonType.help);
+		flatButton1.setVisible(false);
+		add(flatButton1, "cell 1 1,alignx right,growx 0");
+
+		//---- buttonLabel ----
+		buttonLabel.setText("JButton:");
+		add(buttonLabel, "cell 0 3");
+
+		//---- button1 ----
+		button1.setText("Apply");
+		button1.setToolTipText("This button is enabled.");
+		add(button1, "cell 1 3,alignx left,growx 0");
+
+		//---- testDefaultButton1 ----
+		testDefaultButton1.setText("OK");
+		add(testDefaultButton1, "cell 1 3");
+
+		//---- helpButton ----
+		helpButton.setButtonType(FlatButton.ButtonType.help);
+		add(helpButton, "cell 1 3");
+		add(hSpacer2, "cell 1 3");
+
+		//---- toggleButtonLabel ----
+		toggleButtonLabel.setText("JToggleButton:");
+		add(toggleButtonLabel, "cell 0 4");
+
+		//---- toggleButton1 ----
+		toggleButton1.setText("Unselected");
+		toggleButton1.setToolTipText("LOOOOOOOOOOOOOONG TEXT");
+		add(toggleButton1, "cell 1 4,alignx left,growx 0");
+
+		//---- toggleButton3 ----
+		toggleButton3.setText("Selected");
+		toggleButton3.setSelected(true);
+		add(toggleButton3, "cell 1 4");
+		add(hSpacer1, "cell 1 4");
+
+		//---- checkBoxLabel ----
+		checkBoxLabel.setText("JCheckBox");
+		add(checkBoxLabel, "cell 0 5");
+
+		//---- checkBox1 ----
+		checkBox1.setText("Unselected");
+		add(checkBox1, "cell 1 5,alignx left,growx 0");
+
+		//---- checkBox3 ----
+		checkBox3.setText("Selected");
+		checkBox3.setSelected(true);
+		add(checkBox3, "cell 1 5,alignx left,growx 0");
+		add(hSpacer3, "cell 1 5");
+
+		//---- radioButtonLabel ----
+		radioButtonLabel.setText("JRadioButton:");
+		add(radioButtonLabel, "cell 0 6");
+
+		//---- radioButton1 ----
+		radioButton1.setText("Unselected");
+		add(radioButton1, "cell 1 6,alignx left,growx 0");
+
+		//---- radioButton3 ----
+		radioButton3.setText("Selected");
+		radioButton3.setSelected(true);
+		add(radioButton3, "cell 1 6,alignx left,growx 0");
+		add(hSpacer4, "cell 1 6");
+
+		//---- comboBoxLabel ----
+		comboBoxLabel.setText("JComboBox:");
+		add(comboBoxLabel, "cell 0 7");
+
+		//---- comboBox1 ----
+		comboBox1.setEditable(true);
+		comboBox1.setModel(new DefaultComboBoxModel<>(new String[] {
+			"Editable",
+			"a",
+			"bb",
+			"ccc",
+			"dd",
+			"e",
+			"ff",
+			"ggg",
+			"hh",
+			"i",
+			"jj",
+			"kkk"
+		}));
+		comboBox1.setMaximumRowCount(6);
+		comboBox1.setPlaceholderText("placeholder text");
+		add(comboBox1, "cell 1 7");
+
+		//---- comboBox3 ----
+		comboBox3.setModel(new DefaultComboBoxModel<>(new String[] {
+			"Not edit",
+			"a",
+			"bb",
+			"ccc",
+			"dd",
+			"e",
+			"ff",
+			"ggg",
+			"hh",
+			"i",
+			"jj",
+			"kkk"
+		}));
+		comboBox3.setMaximumRowCount(6);
+		add(comboBox3, "cell 1 7");
+
+		//---- spinnerLabel ----
+		spinnerLabel.setText("JSpinner:");
+		add(spinnerLabel, "cell 0 8");
+		add(spinner1, "cell 1 8");
+
+		//---- textFieldLabel ----
+		textFieldLabel.setText("JTextField:");
+		add(textFieldLabel, "cell 0 9");
+
+		//---- textField1 ----
+		textField1.setText("Some Text");
+		textField1.setPlaceholderText("placeholder text");
+		add(textField1, "cell 1 9");
+
+		//---- formattedTextFieldLabel ----
+		formattedTextFieldLabel.setText("JFormattedTextF.:");
+		add(formattedTextFieldLabel, "cell 0 10");
+
+		//---- formattedTextField1 ----
+		formattedTextField1.setText("Some Text");
+		formattedTextField1.setPlaceholderText("placeholder text");
+		add(formattedTextField1, "cell 1 10");
+
+		//---- passwordFieldLabel ----
+		passwordFieldLabel.setText("JPasswordField:");
+		add(passwordFieldLabel, "cell 0 11");
+
+		//---- passwordField1 ----
+		passwordField1.setText("Some Text");
+		passwordField1.setPlaceholderText("placeholder text");
+		add(passwordField1, "cell 1 11");
+
+		//---- textAreaLabel ----
+		textAreaLabel.setText("JTextArea:");
+		add(textAreaLabel, "cell 0 12");
+
+		//======== scrollPane1 ========
+		{
+			scrollPane1.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
+			scrollPane1.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
+
+			//---- textArea1 ----
+			textArea1.setText("Some Text");
+			textArea1.setRows(2);
+			scrollPane1.setViewportView(textArea1);
+		}
+		add(scrollPane1, "cell 1 12");
+
+		//---- editorPaneLabel ----
+		editorPaneLabel.setText("JEditorPane");
+		add(editorPaneLabel, "cell 0 13");
+
+		//======== scrollPane5 ========
+		{
+			scrollPane5.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
+			scrollPane5.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
+
+			//---- editorPane1 ----
+			editorPane1.setText("Some Text");
+			scrollPane5.setViewportView(editorPane1);
+		}
+		add(scrollPane5, "cell 1 13");
+
+		//---- textPaneLabel ----
+		textPaneLabel.setText("JTextPane:");
+		add(textPaneLabel, "cell 0 14");
+
+		//======== scrollPane9 ========
+		{
+			scrollPane9.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
+			scrollPane9.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
+
+			//---- textPane1 ----
+			textPane1.setText("Some Text");
+			scrollPane9.setViewportView(textPane1);
+		}
+		add(scrollPane9, "cell 1 14");
+
+		//---- scrollBarLabel ----
+		scrollBarLabel.setText("JScrollBar:");
+		add(scrollBarLabel, "cell 0 15");
+
+		//---- scrollBar1 ----
+		scrollBar1.setOrientation(Adjustable.HORIZONTAL);
+		add(scrollBar1, "cell 1 15");
+
+		//---- scrollBar5 ----
+		scrollBar5.setOrientation(Adjustable.HORIZONTAL);
+		scrollBar5.setShowButtons(true);
+		add(scrollBar5, "cell 1 16");
+
+		//---- separatorLabel ----
+		separatorLabel.setText("JSeparator:");
+		add(separatorLabel, "cell 0 17");
+		add(separator1, "cell 1 17");
+
+		//---- sliderLabel ----
+		sliderLabel.setText("JSlider:");
+		add(sliderLabel, "cell 0 18");
+
+		//---- slider1 ----
+		slider1.setValue(30);
+		add(slider1, "cell 1 18");
+
+		//---- slider3 ----
+		slider3.setMinorTickSpacing(10);
+		slider3.setPaintTicks(true);
+		slider3.setMajorTickSpacing(50);
+		slider3.setPaintLabels(true);
+		slider3.setValue(30);
+		slider3.addChangeListener(e -> changeProgress());
+		add(slider3, "cell 1 19");
+
+		//---- progressBarLabel ----
+		progressBarLabel.setText("JProgressBar:");
+		add(progressBarLabel, "cell 0 20");
+
+		//---- progressBar1 ----
+		progressBar1.setValue(60);
+		add(progressBar1, "cell 1 20");
+
+		//---- toolTipLabel ----
+		toolTipLabel.setText("JToolTip:");
+		add(toolTipLabel, "cell 0 21");
+
+		//---- toolTip1 ----
+		toolTip1.setTipText("Some text in tool tip.");
+		add(toolTip1, "cell 1 21,alignx left,growx 0");
+
+		//---- tabbedPaneLabel ----
+		tabbedPaneLabel.setText("JTabbedPane:");
+		add(tabbedPaneLabel, "cell 0 22");
+		add(tabbedPane1, "cell 1 22");
+
+		//---- buttonGroup1 ----
+		ButtonGroup buttonGroup1 = new ButtonGroup();
+		buttonGroup1.add(radioButton1);
+		buttonGroup1.add(radioButton3);
+		// JFormDesigner - End of component initialization  //GEN-END:initComponents
+	}
+
+	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
+	private JLabel previewLabel;
+	private JCheckBox enabledCheckBox;
+	private JSeparator separator2;
+	private JLabel labelLabel;
+	private JLabel label1;
+	private FlatButton flatButton1;
+	private JLabel buttonLabel;
+	private JButton button1;
+	private FlatThemePreview.TestDefaultButton testDefaultButton1;
+	private FlatButton helpButton;
+	private JPanel hSpacer2;
+	private JLabel toggleButtonLabel;
+	private JToggleButton toggleButton1;
+	private JToggleButton toggleButton3;
+	private JPanel hSpacer1;
+	private JLabel checkBoxLabel;
+	private JCheckBox checkBox1;
+	private JCheckBox checkBox3;
+	private JPanel hSpacer3;
+	private JLabel radioButtonLabel;
+	private JRadioButton radioButton1;
+	private JRadioButton radioButton3;
+	private JPanel hSpacer4;
+	private JLabel comboBoxLabel;
+	private FlatComboBox<String> comboBox1;
+	private JComboBox<String> comboBox3;
+	private JLabel spinnerLabel;
+	private JSpinner spinner1;
+	private JLabel textFieldLabel;
+	private FlatTextField textField1;
+	private JLabel formattedTextFieldLabel;
+	private FlatFormattedTextField formattedTextField1;
+	private JLabel passwordFieldLabel;
+	private FlatPasswordField passwordField1;
+	private JLabel textAreaLabel;
+	private JScrollPane scrollPane1;
+	private JTextArea textArea1;
+	private JLabel editorPaneLabel;
+	private JScrollPane scrollPane5;
+	private JEditorPane editorPane1;
+	private JLabel textPaneLabel;
+	private JScrollPane scrollPane9;
+	private JTextPane textPane1;
+	private JLabel scrollBarLabel;
+	private JScrollBar scrollBar1;
+	private FlatScrollBar scrollBar5;
+	private JLabel separatorLabel;
+	private JSeparator separator1;
+	private JLabel sliderLabel;
+	private JSlider slider1;
+	private JSlider slider3;
+	private JLabel progressBarLabel;
+	private FlatProgressBar progressBar1;
+	private JLabel toolTipLabel;
+	private JToolTip toolTip1;
+	private JLabel tabbedPaneLabel;
+	private JTabbedPane tabbedPane1;
+	// JFormDesigner - End of variables declaration  //GEN-END:variables
+
+	//---- class TestDefaultButton --------------------------------------------
+
+	private static class TestDefaultButton
+		extends JButton
+	{
+		@Override
+		public boolean isDefaultButton() {
+			return true;
+		}
+	}
+}

flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatThemePreview.jfd

@@ -0,0 +1,422 @@
+JFDML JFormDesigner: "7.0.4.0.360" Java: "16" encoding: "UTF-8"
+
+new FormModel {
+	contentType: "form/swing"
+	root: new FormRoot {
+		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
+			"$layoutConstraints": "insets dialog,hidemode 3"
+			"$columnConstraints": "[fill][130,fill]"
+			"$rowConstraints": "[]0[]unrel[][][][][][][][][][][][][][][][][][][][][][grow]"
+		} ) {
+			name: "this"
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "previewLabel"
+				"text": "Preview"
+				"font": new com.jformdesigner.model.SwingDerivedFont( null, 0, 6, false )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 0 2 1,alignx left,growx 0"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "enabledCheckBox"
+				"text": "Enabled"
+				"selected": true
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "enabledChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 0 2 1,align right top,grow 0 0"
+			} )
+			add( new FormComponent( "javax.swing.JSeparator" ) {
+				name: "separator2"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 1 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "labelLabel"
+				"text": "JLabel:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 2"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label1"
+				"text": "Some Text"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 2"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatButton" ) {
+				name: "flatButton1"
+				"text": "Help"
+				"buttonType": enum com.formdev.flatlaf.extras.components.FlatButton$ButtonType help
+				"visible": false
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 1,alignx right,growx 0"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "buttonLabel"
+				"text": "JButton:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 3"
+			} )
+			add( new FormComponent( "javax.swing.JButton" ) {
+				name: "button1"
+				"text": "Apply"
+				"toolTipText": "This button is enabled."
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 3,alignx left,growx 0"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.themeeditor.FlatThemePreview$TestDefaultButton" ) {
+				name: "testDefaultButton1"
+				"text": "OK"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 3"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatButton" ) {
+				name: "helpButton"
+				"buttonType": enum com.formdev.flatlaf.extras.components.FlatButton$ButtonType help
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 3"
+			} )
+			add( new FormComponent( "com.jformdesigner.designer.wrapper.HSpacer" ) {
+				name: "hSpacer2"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 3"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "toggleButtonLabel"
+				"text": "JToggleButton:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 4"
+			} )
+			add( new FormComponent( "javax.swing.JToggleButton" ) {
+				name: "toggleButton1"
+				"text": "Unselected"
+				"toolTipText": "LOOOOOOOOOOOOOONG TEXT"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 4,alignx left,growx 0"
+			} )
+			add( new FormComponent( "javax.swing.JToggleButton" ) {
+				name: "toggleButton3"
+				"text": "Selected"
+				"selected": true
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 4"
+			} )
+			add( new FormComponent( "com.jformdesigner.designer.wrapper.HSpacer" ) {
+				name: "hSpacer1"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 4"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "checkBoxLabel"
+				"text": "JCheckBox"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 5"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "checkBox1"
+				"text": "Unselected"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 5,alignx left,growx 0"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "checkBox3"
+				"text": "Selected"
+				"selected": true
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 5,alignx left,growx 0"
+			} )
+			add( new FormComponent( "com.jformdesigner.designer.wrapper.HSpacer" ) {
+				name: "hSpacer3"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 5"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "radioButtonLabel"
+				"text": "JRadioButton:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 6"
+			} )
+			add( new FormComponent( "javax.swing.JRadioButton" ) {
+				name: "radioButton1"
+				"text": "Unselected"
+				"$buttonGroup": new FormReference( "buttonGroup1" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6,alignx left,growx 0"
+			} )
+			add( new FormComponent( "javax.swing.JRadioButton" ) {
+				name: "radioButton3"
+				"text": "Selected"
+				"selected": true
+				"$buttonGroup": new FormReference( "buttonGroup1" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6,alignx left,growx 0"
+			} )
+			add( new FormComponent( "com.jformdesigner.designer.wrapper.HSpacer" ) {
+				name: "hSpacer4"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "comboBoxLabel"
+				"text": "JComboBox:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 7"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatComboBox" ) {
+				name: "comboBox1"
+				"editable": true
+				"model": new javax.swing.DefaultComboBoxModel {
+					selectedItem: "Editable"
+					addElement( "Editable" )
+					addElement( "a" )
+					addElement( "bb" )
+					addElement( "ccc" )
+					addElement( "dd" )
+					addElement( "e" )
+					addElement( "ff" )
+					addElement( "ggg" )
+					addElement( "hh" )
+					addElement( "i" )
+					addElement( "jj" )
+					addElement( "kkk" )
+				}
+				"maximumRowCount": 6
+				"placeholderText": "placeholder text"
+				auxiliary() {
+					"JavaCodeGenerator.typeParameters": "String"
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 7"
+			} )
+			add( new FormComponent( "javax.swing.JComboBox" ) {
+				name: "comboBox3"
+				"model": new javax.swing.DefaultComboBoxModel {
+					selectedItem: "Not edit"
+					addElement( "Not edit" )
+					addElement( "a" )
+					addElement( "bb" )
+					addElement( "ccc" )
+					addElement( "dd" )
+					addElement( "e" )
+					addElement( "ff" )
+					addElement( "ggg" )
+					addElement( "hh" )
+					addElement( "i" )
+					addElement( "jj" )
+					addElement( "kkk" )
+				}
+				"maximumRowCount": 6
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 7"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "spinnerLabel"
+				"text": "JSpinner:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 8"
+			} )
+			add( new FormComponent( "javax.swing.JSpinner" ) {
+				name: "spinner1"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 8"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "textFieldLabel"
+				"text": "JTextField:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 9"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatTextField" ) {
+				name: "textField1"
+				"text": "Some Text"
+				"placeholderText": "placeholder text"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "formattedTextFieldLabel"
+				"text": "JFormattedTextF.:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 10"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatFormattedTextField" ) {
+				name: "formattedTextField1"
+				"text": "Some Text"
+				"placeholderText": "placeholder text"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 10"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "passwordFieldLabel"
+				"text": "JPasswordField:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 11"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatPasswordField" ) {
+				name: "passwordField1"
+				"text": "Some Text"
+				"placeholderText": "placeholder text"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 11"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "textAreaLabel"
+				"text": "JTextArea:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 12"
+			} )
+			add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
+				name: "scrollPane1"
+				"verticalScrollBarPolicy": 21
+				"horizontalScrollBarPolicy": 31
+				add( new FormComponent( "javax.swing.JTextArea" ) {
+					name: "textArea1"
+					"text": "Some Text"
+					"rows": 2
+				} )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 12"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "editorPaneLabel"
+				"text": "JEditorPane"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 13"
+			} )
+			add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
+				name: "scrollPane5"
+				"verticalScrollBarPolicy": 21
+				"horizontalScrollBarPolicy": 31
+				add( new FormComponent( "javax.swing.JEditorPane" ) {
+					name: "editorPane1"
+					"text": "Some Text"
+				} )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 13"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "textPaneLabel"
+				"text": "JTextPane:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 14"
+			} )
+			add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
+				name: "scrollPane9"
+				"verticalScrollBarPolicy": 21
+				"horizontalScrollBarPolicy": 31
+				add( new FormComponent( "javax.swing.JTextPane" ) {
+					name: "textPane1"
+					"text": "Some Text"
+				} )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 14"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "scrollBarLabel"
+				"text": "JScrollBar:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 15"
+			} )
+			add( new FormComponent( "javax.swing.JScrollBar" ) {
+				name: "scrollBar1"
+				"orientation": 0
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 15"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatScrollBar" ) {
+				name: "scrollBar5"
+				"orientation": 0
+				"showButtons": true
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 16"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "separatorLabel"
+				"text": "JSeparator:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 17"
+			} )
+			add( new FormComponent( "javax.swing.JSeparator" ) {
+				name: "separator1"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 17"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "sliderLabel"
+				"text": "JSlider:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 18"
+			} )
+			add( new FormComponent( "javax.swing.JSlider" ) {
+				name: "slider1"
+				"value": 30
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 18"
+			} )
+			add( new FormComponent( "javax.swing.JSlider" ) {
+				name: "slider3"
+				"minorTickSpacing": 10
+				"paintTicks": true
+				"majorTickSpacing": 50
+				"paintLabels": true
+				"value": 30
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "javax.swing.event.ChangeListener", "stateChanged", "changeProgress", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 19"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "progressBarLabel"
+				"text": "JProgressBar:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 20"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatProgressBar" ) {
+				name: "progressBar1"
+				"value": 60
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 20"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "toolTipLabel"
+				"text": "JToolTip:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 21"
+			} )
+			add( new FormComponent( "javax.swing.JToolTip" ) {
+				name: "toolTip1"
+				"tipText": "Some text in tool tip."
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 21,alignx left,growx 0"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "tabbedPaneLabel"
+				"text": "JTabbedPane:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 22"
+			} )
+			add( new FormContainer( "javax.swing.JTabbedPane", new FormLayoutManager( class javax.swing.JTabbedPane ) ) {
+				name: "tabbedPane1"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 22"
+			} )
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 0 )
+			"size": new java.awt.Dimension( 400, 785 )
+		} )
+		add( new FormNonVisual( "javax.swing.ButtonGroup" ) {
+			name: "buttonGroup1"
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 955 )
+		} )
+	}
+}

flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatThemePropertiesSupport.java

@@ -49,6 +49,7 @@ class FlatThemePropertiesSupport
 	// caches
 	private Properties propertiesCache;
 	private final Map<Integer, Object> parsedValueCache = new HashMap<>();
+	private final Map<String, Object> parsedValueCache2 = new HashMap<>();
 	private Set<String> allKeysCache;
 	private String baseTheme;
 
@@ -123,6 +124,28 @@ class FlatThemePropertiesSupport
 		}
 	}
 
+	Object getParsedProperty( String key ) {
+		Object parsedValue = parsedValueCache2.get( key );
+		if( parsedValue != null )
+			return !(parsedValue instanceof Exception) ? parsedValue : null;
+
+		String str = getPropertyOrWildcard( key );
+		if( str == null )
+			return null;
+
+		try {
+			Object[] resultValueType = new Object[1];
+			String value = resolveValue( str );
+			parsedValue = UIDefaultsLoaderAccessor.parseValue( key, value, resultValueType, resolver );
+			parsedValueCache2.put( key, parsedValue );
+			return parsedValue;
+		} catch( Exception ex ) {
+			System.out.println( textArea.getFileName() + ": " + ex.getMessage() ); //TODO
+			parsedValueCache2.put( key, ex );
+			return null;
+		}
+	}
+
 	private String getPropertyOrWildcard( String key ) {
 		String value = getProperty( key );
 		if( value != null )
@@ -192,6 +215,7 @@ class FlatThemePropertiesSupport
 	private void clearCache() {
 		propertiesCache = null;
 		parsedValueCache.clear();
+		parsedValueCache2.clear();
 		allKeysCache = null;
 		baseTheme = null;
 
@@ -208,6 +232,7 @@ class FlatThemePropertiesSupport
 			return;
 
 		parsedValueCache.clear();
+		parsedValueCache2.clear();
 		allKeysCache = null;
 	}
 

flatlaf-theme-editor/src/main/resources/com/formdev/flatlaf/themeeditor/FlatDarkLaf.properties

@@ -16,7 +16,7 @@
 
 #---- TabbedPane ----
 
-TabbedPane.selectedBackground = darken($TabbedPane.background,5%)
+#TabbedPane.selectedBackground = darken($TabbedPane.background,5%)
 
 
 #---- FlatThemeEditorPane ----

flatlaf-theme-editor/src/main/resources/com/formdev/flatlaf/themeeditor/FlatLightLaf.properties

@@ -16,7 +16,7 @@
 
 #---- TabbedPane ----
 
-TabbedPane.selectedBackground = lighten($TabbedPane.background,5%)
+#TabbedPane.selectedBackground = lighten($TabbedPane.background,5%)
 
 
 #---- FlatThemeEditorPane ----