UI defaults inspector: support embedding into any window

CHANGELOG.md

@@ -9,6 +9,8 @@ FlatLaf Change Log
   buttons.
 - TextComponent: Clip placeholder text if it does not fit into visible area. (PR
   #229)
+- Extras: Support embedding UI defaults inspector into any window (see
+  `FlatUIDefaultsInspector.createInspectorPanel()`.
 
 #### Fixed bugs
 

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

@@ -66,9 +66,8 @@ public class FlatUIDefaultsInspector
 {
 	private static final int KEY_MODIFIERS_MASK = InputEvent.CTRL_DOWN_MASK | InputEvent.SHIFT_DOWN_MASK | InputEvent.ALT_DOWN_MASK | InputEvent.META_DOWN_MASK;
 
-	private static FlatUIDefaultsInspector inspector;
+	private static JFrame inspectorFrame;
 
-	private final String title;
 	private final PropertyChangeListener lafListener = this::lafChanged;
 	private final PropertyChangeListener lafDefaultsListener = this::lafDefaultsChanged;
 	private boolean refreshPending;
@@ -92,27 +91,31 @@ public class FlatUIDefaultsInspector
 	}
 
 	public static void show() {
-		if( inspector != null ) {
+		if( inspectorFrame != null ) {
-			inspector.ensureOnScreen();
+			ensureOnScreen( inspectorFrame );
-			inspector.frame.toFront();
+			inspectorFrame.toFront();
 			return;
 		}
 
-		inspector = new FlatUIDefaultsInspector();
+		inspectorFrame = new FlatUIDefaultsInspector().createFrame();
-		inspector.frame.setVisible( true );
+		inspectorFrame.setVisible( true );
 	}
 
 	public static void hide() {
-		if( inspector != null )
+		if( inspectorFrame != null )
-			inspector.frame.dispose();
+			inspectorFrame.dispose();
+	}
+
+	/**
+	 * Creates a UI defaults inspector panel that can be embedded into any window.
+	 */
+	public static JComponent createInspectorPanel() {
+		return new FlatUIDefaultsInspector().panel;
 	}
 
 	private FlatUIDefaultsInspector() {
 		initComponents();
 
-		title = frame.getTitle();
-		updateWindowTitle();
-
 		panel.setBorder( new ScaledEmptyBorder( 10, 10, 10, 10 ) );
 		filterPanel.setBorder( new ScaledEmptyBorder( 0, 0, 10, 0 ) );
 
@@ -143,24 +146,21 @@ public class FlatUIDefaultsInspector
 		table.getRowSorter().setSortKeys( Collections.singletonList(
 			new RowSorter.SortKey( 0, SortOrder.ASCENDING ) ) );
 
-		// restore window bounds
-		Preferences prefs = getPrefs();
-		int x = prefs.getInt( "x", -1 );
-		int y = prefs.getInt( "y", -1 );
-		int width = prefs.getInt( "width", UIScale.scale( 600 ) );
-		int height = prefs.getInt( "height", UIScale.scale( 800 ) );
-		frame.setSize( width, height );
-		if( x != -1 && y != -1 ) {
-			frame.setLocation( x, y );
-			ensureOnScreen();
-		} else
-			frame.setLocationRelativeTo( null );
-
 		// restore column widths
+		Preferences prefs = getPrefs();
 		TableColumnModel columnModel = table.getColumnModel();
 		columnModel.getColumn( 0 ).setPreferredWidth( prefs.getInt( "column1width", 100 ) );
 		columnModel.getColumn( 1 ).setPreferredWidth( prefs.getInt( "column2width", 100 ) );
 
+		PropertyChangeListener columnWidthListener = e -> {
+			if( "width".equals( e.getPropertyName() ) ) {
+				prefs.putInt( "column1width", columnModel.getColumn( 0 ).getWidth() );
+				prefs.putInt( "column2width", columnModel.getColumn( 1 ).getWidth() );
+			}
+		};
+		columnModel.getColumn( 0 ).addPropertyChangeListener( columnWidthListener );
+		columnModel.getColumn( 1 ).addPropertyChangeListener( columnWidthListener );
+
 		// restore filter
 		String filter = prefs.get( "filter", "" );
 		String valueType = prefs.get( "valueType", null );
@@ -169,20 +169,66 @@ public class FlatUIDefaultsInspector
 		if( valueType != null )
 			valueTypeField.setSelectedItem( valueType );
 
-		UIManager.addPropertyChangeListener( lafListener );
+		panel.addPropertyChangeListener( "ancestor", e -> {
-		UIManager.getDefaults().addPropertyChangeListener( lafDefaultsListener );
+			if( e.getNewValue() != null ) {
+				UIManager.addPropertyChangeListener( lafListener );
+				UIManager.getDefaults().addPropertyChangeListener( lafDefaultsListener );
+			} else {
+				UIManager.removePropertyChangeListener( lafListener );
+				UIManager.getDefaults().removePropertyChangeListener( lafDefaultsListener );
+			}
+		} );
 
 		// register F5 key to refresh
-		((JComponent)frame.getContentPane()).registerKeyboardAction(
+		panel.registerKeyboardAction(
 			e -> refresh(),
 			KeyStroke.getKeyStroke( KeyEvent.VK_F5, 0, false ),
 			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
+	}
+
+	private JFrame createFrame() {
+		JFrame frame = new JFrame();
+		frame.setTitle( "UI Defaults Inspector" );
+		frame.setDefaultCloseOperation( WindowConstants.DISPOSE_ON_CLOSE );
+		frame.addWindowListener( new WindowAdapter() {
+			@Override
+			public void windowClosed( WindowEvent e ) {
+				inspectorFrame = null;
+			}
+			@Override
+			public void windowClosing( WindowEvent e ) {
+				saveWindowBounds( frame );
+			}
+			@Override
+			public void windowDeactivated( WindowEvent e ) {
+				saveWindowBounds( frame );
+			}
+		} );
+
+		updateWindowTitle( frame );
+
+		frame.getContentPane().add( panel, BorderLayout.CENTER );
+
+		// restore window bounds
+		Preferences prefs = getPrefs();
+		int x = prefs.getInt( "x", -1 );
+		int y = prefs.getInt( "y", -1 );
+		int width = prefs.getInt( "width", UIScale.scale( 600 ) );
+		int height = prefs.getInt( "height", UIScale.scale( 800 ) );
+		frame.setSize( width, height );
+		if( x != -1 && y != -1 ) {
+			frame.setLocation( x, y );
+			ensureOnScreen( frame );
+		} else
+			frame.setLocationRelativeTo( null );
 
 		// register ESC key to close frame
 		((JComponent)frame.getContentPane()).registerKeyboardAction(
 			e -> frame.dispose(),
 			KeyStroke.getKeyStroke( KeyEvent.VK_ESCAPE, 0, false ),
 			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
+
+		return frame;
 	}
 
 	private void delegateKey( int keyCode, String actionKey ) {
@@ -202,7 +248,7 @@ public class FlatUIDefaultsInspector
 		} );
 	}
 
-	private void ensureOnScreen() {
+	private static void ensureOnScreen( JFrame frame ) {
 		Rectangle frameBounds = frame.getBounds();
 		boolean onScreen = false;
 		for( GraphicsDevice screen : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices() ) {
@@ -219,12 +265,12 @@ public class FlatUIDefaultsInspector
 			frame.setLocationRelativeTo( null );
 	}
 
-	void lafChanged( PropertyChangeEvent e ) {
+	private void lafChanged( PropertyChangeEvent e ) {
 		if( "lookAndFeel".equals( e.getPropertyName() ) )
 			refresh();
 	}
 
-	void lafDefaultsChanged( PropertyChangeEvent e ) {
+	private void lafDefaultsChanged( PropertyChangeEvent e ) {
 		if( refreshPending )
 			return;
 
@@ -235,11 +281,13 @@ public class FlatUIDefaultsInspector
 		} );
 	}
 
-	void refresh() {
+	private void refresh() {
 		ItemsTableModel model = (ItemsTableModel) table.getModel();
 		model.setItems( getUIDefaultsItems() );
 
-		updateWindowTitle();
+		JFrame frame = (JFrame) SwingUtilities.getAncestorOfClass( JFrame.class, panel );
+		if( frame != null )
+			updateWindowTitle( frame );
 	}
 
 	private Item[] getUIDefaultsItems() {
@@ -277,33 +325,27 @@ public class FlatUIDefaultsInspector
 		return items.toArray( new Item[items.size()] );
 	}
 
-	private void updateWindowTitle() {
+	private void updateWindowTitle( JFrame frame ) {
-		frame.setTitle( title + "  -  " + UIManager.getLookAndFeel().getName() );
+		String title = frame.getTitle();
+		String sep = "  -  ";
+		int sepIndex = title.indexOf( sep );
+		if( sepIndex >= 0 )
+			title = title.substring( 0, sepIndex );
+		frame.setTitle( title + sep + UIManager.getLookAndFeel().getName() );
 	}
 
-	private void saveWindowBounds() {
+	private void saveWindowBounds( JFrame frame ) {
 		Preferences prefs = getPrefs();
 		prefs.putInt( "x", frame.getX() );
 		prefs.putInt( "y", frame.getY() );
 		prefs.putInt( "width", frame.getWidth() );
 		prefs.putInt( "height", frame.getHeight() );
-
-		TableColumnModel columnModel = table.getColumnModel();
-		prefs.putInt( "column1width", columnModel.getColumn( 0 ).getWidth() );
-		prefs.putInt( "column2width", columnModel.getColumn( 1 ).getWidth() );
 	}
 
 	private Preferences getPrefs() {
 		return Preferences.userRoot().node( "flatlaf-uidefaults-inspector" );
 	}
 
-	private void windowClosed() {
-		UIManager.removePropertyChangeListener( lafListener );
-		UIManager.getDefaults().removePropertyChangeListener( lafDefaultsListener );
-
-		inspector = null;
-	}
-
 	private void filterChanged() {
 		String filter = filterField.getText().trim();
 		String valueType = (String) valueTypeField.getSelectedItem();
@@ -360,7 +402,6 @@ public class FlatUIDefaultsInspector
 
 	private void initComponents() {
 		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
-		frame = new JFrame();
 		panel = new JPanel();
 		filterPanel = new JPanel();
 		flterLabel = new JLabel();
@@ -370,99 +411,75 @@ public class FlatUIDefaultsInspector
 		scrollPane = new JScrollPane();
 		table = new JTable();
 
-		//======== frame ========
+		//======== panel ========
 		{
-			frame.setTitle("UI Defaults Inspector");
+			panel.setLayout(new BorderLayout());
-			frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
-			frame.addWindowListener(new WindowAdapter() {
-				@Override
-				public void windowClosed(WindowEvent e) {
-					FlatUIDefaultsInspector.this.windowClosed();
-				}
-				@Override
-				public void windowClosing(WindowEvent e) {
-					saveWindowBounds();
-				}
-				@Override
-				public void windowDeactivated(WindowEvent e) {
-					saveWindowBounds();
-				}
-			});
-			Container frameContentPane = frame.getContentPane();
-			frameContentPane.setLayout(new BorderLayout());
 
-			//======== panel ========
+			//======== filterPanel ========
 			{
-				panel.setLayout(new BorderLayout());
+				filterPanel.setLayout(new GridBagLayout());
+				((GridBagLayout)filterPanel.getLayout()).columnWidths = new int[] {0, 0, 0, 0, 0};
+				((GridBagLayout)filterPanel.getLayout()).rowHeights = new int[] {0, 0};
+				((GridBagLayout)filterPanel.getLayout()).columnWeights = new double[] {0.0, 1.0, 0.0, 0.0, 1.0E-4};
+				((GridBagLayout)filterPanel.getLayout()).rowWeights = new double[] {0.0, 1.0E-4};
 
-				//======== filterPanel ========
+				//---- flterLabel ----
-				{
+				flterLabel.setText("Filter:");
-					filterPanel.setLayout(new GridBagLayout());
+				flterLabel.setLabelFor(filterField);
-					((GridBagLayout)filterPanel.getLayout()).columnWidths = new int[] {0, 0, 0, 0, 0};
+				flterLabel.setDisplayedMnemonic('F');
-					((GridBagLayout)filterPanel.getLayout()).rowHeights = new int[] {0, 0};
+				filterPanel.add(flterLabel, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0,
-					((GridBagLayout)filterPanel.getLayout()).columnWeights = new double[] {0.0, 1.0, 0.0, 0.0, 1.0E-4};
+					GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-					((GridBagLayout)filterPanel.getLayout()).rowWeights = new double[] {0.0, 1.0E-4};
+					new Insets(0, 0, 0, 10), 0, 0));
 
-					//---- flterLabel ----
+				//---- filterField ----
-					flterLabel.setText("Filter:");
+				filterField.putClientProperty("JTextField.placeholderText", "enter one or more filter strings, separated by space characters");
-					flterLabel.setLabelFor(filterField);
+				filterPanel.add(filterField, new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
-					flterLabel.setDisplayedMnemonic('F');
+					GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-					filterPanel.add(flterLabel, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0,
+					new Insets(0, 0, 0, 10), 0, 0));
-						GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-						new Insets(0, 0, 0, 10), 0, 0));
 
-					//---- filterField ----
+				//---- valueTypeLabel ----
-					filterField.putClientProperty("JTextField.placeholderText", "enter one or more filter strings, separated by space characters");
+				valueTypeLabel.setText("Value Type:");
-					filterPanel.add(filterField, new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
+				valueTypeLabel.setLabelFor(valueTypeField);
-						GridBagConstraints.CENTER, GridBagConstraints.BOTH,
+				valueTypeLabel.setDisplayedMnemonic('T');
-						new Insets(0, 0, 0, 10), 0, 0));
+				filterPanel.add(valueTypeLabel, new GridBagConstraints(2, 0, 1, 1, 0.0, 0.0,
+					GridBagConstraints.CENTER, GridBagConstraints.BOTH,
+					new Insets(0, 0, 0, 10), 0, 0));
 
-					//---- valueTypeLabel ----
+				//---- valueTypeField ----
-					valueTypeLabel.setText("Value Type:");
+				valueTypeField.setModel(new DefaultComboBoxModel<>(new String[] {
-					valueTypeLabel.setLabelFor(valueTypeField);
+					"(any)",
-					valueTypeLabel.setDisplayedMnemonic('T');
+					"Boolean",
-					filterPanel.add(valueTypeLabel, new GridBagConstraints(2, 0, 1, 1, 0.0, 0.0,
+					"Border",
-						GridBagConstraints.CENTER, GridBagConstraints.BOTH,
+					"Color",
-						new Insets(0, 0, 0, 10), 0, 0));
+					"Dimension",
-
+					"Float",
-					//---- valueTypeField ----
+					"Font",
-					valueTypeField.setModel(new DefaultComboBoxModel<>(new String[] {
+					"Icon",
-						"(any)",
+					"Insets",
-						"Boolean",
+					"Integer",
-						"Border",
+					"String",
-						"Color",
+					"(other)"
-						"Dimension",
+				}));
-						"Float",
+				valueTypeField.addActionListener(e -> filterChanged());
-						"Font",
+				filterPanel.add(valueTypeField, new GridBagConstraints(3, 0, 1, 1, 0.0, 0.0,
-						"Icon",
+					GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-						"Insets",
+					new Insets(0, 0, 0, 0), 0, 0));
-						"Integer",
-						"String",
-						"(other)"
-					}));
-					valueTypeField.addActionListener(e -> filterChanged());
-					filterPanel.add(valueTypeField, new GridBagConstraints(3, 0, 1, 1, 0.0, 0.0,
-						GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-						new Insets(0, 0, 0, 0), 0, 0));
-				}
-				panel.add(filterPanel, BorderLayout.NORTH);
-
-				//======== scrollPane ========
-				{
-
-					//---- table ----
-					table.setAutoCreateRowSorter(true);
-					scrollPane.setViewportView(table);
-				}
-				panel.add(scrollPane, BorderLayout.CENTER);
 			}
-			frameContentPane.add(panel, BorderLayout.CENTER);
+			panel.add(filterPanel, BorderLayout.NORTH);
+
+			//======== scrollPane ========
+			{
+
+				//---- table ----
+				table.setAutoCreateRowSorter(true);
+				scrollPane.setViewportView(table);
+			}
+			panel.add(scrollPane, BorderLayout.CENTER);
 		}
 		// JFormDesigner - End of component initialization  //GEN-END:initComponents
 	}
 
 	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
-	private JFrame frame;
 	private JPanel panel;
 	private JPanel filterPanel;
 	private JLabel flterLabel;

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

@@ -1,83 +1,71 @@
-JFDML JFormDesigner: "7.0.2.0.298" Java: "14" encoding: "UTF-8"
+JFDML JFormDesigner: "7.0.3.1.342" Java: "15" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
 	root: new FormRoot {
-		add( new FormWindow( "javax.swing.JFrame", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-			name: "frame"
+			name: "panel"
-			"title": "UI Defaults Inspector"
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.GridBagLayout ) {
-			"defaultCloseOperation": 2
+				"$columnSpecs": "0, 0:1.0, 0, 0"
-			"$sizePolicy": 2
+				"$rowSpecs": "0"
-			"$locationPolicy": 2
+				"$hGap": 10
-			addEvent( new FormEvent( "java.awt.event.WindowListener", "windowClosed", "windowClosed", false ) )
+				"$vGap": 5
-			addEvent( new FormEvent( "java.awt.event.WindowListener", "windowClosing", "saveWindowBounds", false ) )
+				"$alignLeft": true
-			addEvent( new FormEvent( "java.awt.event.WindowListener", "windowDeactivated", "saveWindowBounds", false ) )
+				"$alignTop": true
-			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+			} ) {
-				name: "panel"
+				name: "filterPanel"
-				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.GridBagLayout ) {
+				add( new FormComponent( "javax.swing.JLabel" ) {
-					"$columnSpecs": "0, 0:1.0, 0, 0"
+					name: "flterLabel"
-					"$rowSpecs": "0"
+					"text": "Filter:"
-					"$hGap": 10
+					"labelFor": new FormReference( "filterField" )
-					"$vGap": 5
+					"displayedMnemonic": 70
-					"$alignLeft": true
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) )
-					"$alignTop": true
+				add( new FormComponent( "javax.swing.JTextField" ) {
-				} ) {
+					name: "filterField"
-					name: "filterPanel"
+					"$client.JTextField.placeholderText": "enter one or more filter strings, separated by space characters"
-					add( new FormComponent( "javax.swing.JLabel" ) {
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
-						name: "flterLabel"
+					"gridx": 1
-						"text": "Filter:"
-						"labelFor": new FormReference( "filterField" )
-						"displayedMnemonic": 70
-					}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) )
-					add( new FormComponent( "javax.swing.JTextField" ) {
-						name: "filterField"
-						"$client.JTextField.placeholderText": "enter one or more filter strings, separated by space characters"
-					}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
-						"gridx": 1
-					} )
-					add( new FormComponent( "javax.swing.JLabel" ) {
-						name: "valueTypeLabel"
-						"text": "Value Type:"
-						"labelFor": new FormReference( "valueTypeField" )
-						"displayedMnemonic": 84
-					}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
-						"gridx": 2
-					} )
-					add( new FormComponent( "javax.swing.JComboBox" ) {
-						name: "valueTypeField"
-						"model": new javax.swing.DefaultComboBoxModel {
-							selectedItem: "(any)"
-							addElement( "(any)" )
-							addElement( "Boolean" )
-							addElement( "Border" )
-							addElement( "Color" )
-							addElement( "Dimension" )
-							addElement( "Float" )
-							addElement( "Font" )
-							addElement( "Icon" )
-							addElement( "Insets" )
-							addElement( "Integer" )
-							addElement( "String" )
-							addElement( "(other)" )
-						}
-						auxiliary() {
-							"JavaCodeGenerator.typeParameters": "String"
-						}
-						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "filterChanged", false ) )
-					}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
-						"gridx": 3
-					} )
-				}, new FormLayoutConstraints( class java.lang.String ) {
-					"value": "North"
 				} )
-				add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
+				add( new FormComponent( "javax.swing.JLabel" ) {
-					name: "scrollPane"
+					name: "valueTypeLabel"
-					add( new FormComponent( "javax.swing.JTable" ) {
+					"text": "Value Type:"
-						name: "table"
+					"labelFor": new FormReference( "valueTypeField" )
-						"autoCreateRowSorter": true
+					"displayedMnemonic": 84
-					} )
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
-				}, new FormLayoutConstraints( class java.lang.String ) {
+					"gridx": 2
-					"value": "Center"
+				} )
+				add( new FormComponent( "javax.swing.JComboBox" ) {
+					name: "valueTypeField"
+					"model": new javax.swing.DefaultComboBoxModel {
+						selectedItem: "(any)"
+						addElement( "(any)" )
+						addElement( "Boolean" )
+						addElement( "Border" )
+						addElement( "Color" )
+						addElement( "Dimension" )
+						addElement( "Float" )
+						addElement( "Font" )
+						addElement( "Icon" )
+						addElement( "Insets" )
+						addElement( "Integer" )
+						addElement( "String" )
+						addElement( "(other)" )
+					}
+					auxiliary() {
+						"JavaCodeGenerator.typeParameters": "String"
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "filterChanged", false ) )
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+					"gridx": 3
+				} )
+			}, new FormLayoutConstraints( class java.lang.String ) {
+				"value": "North"
+			} )
+			add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
+				name: "scrollPane"
+				add( new FormComponent( "javax.swing.JTable" ) {
+					name: "table"
+					"autoCreateRowSorter": true
 				} )
 			}, new FormLayoutConstraints( class java.lang.String ) {
 				"value": "Center"

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.java

@@ -27,6 +27,7 @@ import java.util.function.BiConsumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 import javax.swing.*;
+import javax.swing.FocusManager;
 import javax.swing.UIManager.LookAndFeelInfo;
 import javax.swing.plaf.ColorUIResource;
 import javax.swing.plaf.metal.MetalLookAndFeel;
@@ -504,6 +505,29 @@ public class FlatTestFrame
 		inspector.setEnabled( inspectCheckBox.isSelected() );
 	}
 
+	private void uiDefaultsInspectorChanged() {
+		getContentPane().removeAll();
+
+		FocusManager focusManager = FocusManager.getCurrentManager();
+		Component focusOwner = focusManager.getFocusOwner();
+
+		if( uiDefaultsInspectorCheckBox.isSelected() ) {
+			JComponent uiDefaultsInspector = FlatUIDefaultsInspector.createInspectorPanel();
+
+			JSplitPane splitPane = new JSplitPane();
+			splitPane.setLeftComponent( dialogPane );
+			splitPane.setRightComponent( uiDefaultsInspector );
+			getContentPane().add( splitPane, BorderLayout.CENTER );
+		} else
+			getContentPane().add( dialogPane, BorderLayout.CENTER );
+
+		if( focusOwner != null && focusOwner.isDisplayable() )
+			focusOwner.requestFocusInWindow();
+
+		pack();
+		setLocationRelativeTo( null );
+	}
+
 	private void scaleFactorChanged() {
 		String scaleFactor = (String) scaleFactorComboBox.getSelectedItem();
 		if( "default".equals( scaleFactor ) )
@@ -662,6 +686,7 @@ public class FlatTestFrame
 		rightToLeftCheckBox = new JCheckBox();
 		enabledCheckBox = new JCheckBox();
 		inspectCheckBox = new JCheckBox();
+		uiDefaultsInspectorCheckBox = new JCheckBox();
 		explicitColorsCheckBox = new JCheckBox();
 		backgroundCheckBox = new JCheckBox();
 		opaqueTriStateCheckBox = new FlatTriStateCheckBox();
@@ -704,6 +729,7 @@ public class FlatTestFrame
 					"[fill]" +
 					"[fill]" +
 					"[fill]" +
+					"[fill]" +
 					"[grow,fill]" +
 					"[button,fill]",
 					// rows
@@ -757,23 +783,29 @@ public class FlatTestFrame
 				inspectCheckBox.addActionListener(e -> inspectChanged());
 				buttonBar.add(inspectCheckBox, "cell 5 0");
 
+				//---- uiDefaultsInspectorCheckBox ----
+				uiDefaultsInspectorCheckBox.setText("UI defaults");
+				uiDefaultsInspectorCheckBox.setMnemonic('U');
+				uiDefaultsInspectorCheckBox.addActionListener(e -> uiDefaultsInspectorChanged());
+				buttonBar.add(uiDefaultsInspectorCheckBox, "cell 6 0");
+
 				//---- explicitColorsCheckBox ----
 				explicitColorsCheckBox.setText("explicit colors");
 				explicitColorsCheckBox.setMnemonic('X');
 				explicitColorsCheckBox.addActionListener(e -> explicitColorsChanged());
-				buttonBar.add(explicitColorsCheckBox, "cell 6 0");
+				buttonBar.add(explicitColorsCheckBox, "cell 7 0");
 
 				//---- backgroundCheckBox ----
 				backgroundCheckBox.setText("background");
 				backgroundCheckBox.setMnemonic('B');
 				backgroundCheckBox.addActionListener(e -> backgroundChanged());
-				buttonBar.add(backgroundCheckBox, "cell 7 0");
+				buttonBar.add(backgroundCheckBox, "cell 8 0");
 
 				//---- opaqueTriStateCheckBox ----
 				opaqueTriStateCheckBox.setText("opaque");
 				opaqueTriStateCheckBox.setMnemonic('O');
 				opaqueTriStateCheckBox.addActionListener(e -> opaqueChanged());
-				buttonBar.add(opaqueTriStateCheckBox, "cell 8 0");
+				buttonBar.add(opaqueTriStateCheckBox, "cell 9 0");
 
 				//---- sizeVariantComboBox ----
 				sizeVariantComboBox.setModel(new DefaultComboBoxModel<>(new String[] {
@@ -784,11 +816,11 @@ public class FlatTestFrame
 				}));
 				sizeVariantComboBox.setSelectedIndex(2);
 				sizeVariantComboBox.addActionListener(e -> sizeVariantChanged());
-				buttonBar.add(sizeVariantComboBox, "cell 9 0");
+				buttonBar.add(sizeVariantComboBox, "cell 10 0");
 
 				//---- closeButton ----
 				closeButton.setText("Close");
-				buttonBar.add(closeButton, "cell 11 0");
+				buttonBar.add(closeButton, "cell 12 0");
 			}
 			dialogPane.add(buttonBar, BorderLayout.SOUTH);
 			dialogPane.add(themesPanel, BorderLayout.EAST);
@@ -807,6 +839,7 @@ public class FlatTestFrame
 	private JCheckBox rightToLeftCheckBox;
 	private JCheckBox enabledCheckBox;
 	private JCheckBox inspectCheckBox;
+	private JCheckBox uiDefaultsInspectorCheckBox;
 	private JCheckBox explicitColorsCheckBox;
 	private JCheckBox backgroundCheckBox;
 	private FlatTriStateCheckBox opaqueTriStateCheckBox;

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestFrame.jfd

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "7.0.2.0.298" Java: "14" encoding: "UTF-8"
+JFDML JFormDesigner: "7.0.3.1.342" Java: "15" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -21,7 +21,7 @@ new FormModel {
 				} )
 				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 					"$layoutConstraints": "insets dialog"
-					"$columnConstraints": "[fill][fill][fill][fill][fill][fill][fill][fill][fill][fill][grow,fill][button,fill]"
+					"$columnConstraints": "[fill][fill][fill][fill][fill][fill][fill][fill][fill][fill][fill][grow,fill][button,fill]"
 					"$rowSpecs": "[fill]"
 				} ) {
 					name: "buttonBar"
@@ -91,13 +91,21 @@ new FormModel {
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 						"value": "cell 5 0"
 					} )
+					add( new FormComponent( "javax.swing.JCheckBox" ) {
+						name: "uiDefaultsInspectorCheckBox"
+						"text": "UI defaults"
+						"mnemonic": 85
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "uiDefaultsInspectorChanged", false ) )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 6 0"
+					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "explicitColorsCheckBox"
 						"text": "explicit colors"
 						"mnemonic": 88
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "explicitColorsChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 6 0"
+						"value": "cell 7 0"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "backgroundCheckBox"
@@ -105,7 +113,7 @@ new FormModel {
 						"mnemonic": 66
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "backgroundChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 7 0"
+						"value": "cell 8 0"
 					} )
 					add( new FormComponent( "com.formdev.flatlaf.extras.components.FlatTriStateCheckBox" ) {
 						name: "opaqueTriStateCheckBox"
@@ -113,7 +121,7 @@ new FormModel {
 						"mnemonic": 79
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "opaqueChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 8 0"
+						"value": "cell 9 0"
 					} )
 					add( new FormComponent( "javax.swing.JComboBox" ) {
 						name: "sizeVariantComboBox"
@@ -127,13 +135,13 @@ new FormModel {
 						"selectedIndex": 2
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "sizeVariantChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 9 0"
+						"value": "cell 10 0"
 					} )
 					add( new FormComponent( "javax.swing.JButton" ) {
 						name: "closeButton"
 						"text": "Close"
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 11 0"
+						"value": "cell 12 0"
 					} )
 				}, new FormLayoutConstraints( class java.lang.String ) {
 					"value": "South"