Testing: easier testing of various system scale factors using Alt+Shift+F1...F12

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

@@ -140,8 +140,8 @@ class ControlBar
 			registerSwitchToLookAndFeel( KeyEvent.VK_F9, "com.apple.laf.AquaLookAndFeel" );
 		else if( SystemInfo.isLinux )
 			registerSwitchToLookAndFeel( KeyEvent.VK_F9, "com.sun.java.swing.plaf.gtk.GTKLookAndFeel" );
-		registerSwitchToLookAndFeel( KeyEvent.VK_F12, MetalLookAndFeel.class.getName() );
 		registerSwitchToLookAndFeel( KeyEvent.VK_F11, NimbusLookAndFeel.class.getName() );
+		registerSwitchToLookAndFeel( KeyEvent.VK_F12, MetalLookAndFeel.class.getName() );
 
 		// register Alt+UP and Alt+DOWN to switch to previous/next theme
 		((JComponent)frame.getContentPane()).registerKeyboardAction(
@@ -153,6 +153,9 @@ class ControlBar
 			KeyStroke.getKeyStroke( KeyEvent.VK_DOWN, KeyEvent.ALT_DOWN_MASK ),
 			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 
+		// register Alt+Shift+F1, F2, ... keys to change system scale factor
+		DemoPrefs.registerSystemScaleFactors( frame );
+
 		// register ESC key to close frame
 		((JComponent)frame.getContentPane()).registerKeyboardAction(
 			e -> {

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

@@ -19,6 +19,10 @@ package com.formdev.flatlaf.demo;
 import java.io.File;
 import java.io.FileInputStream;
 import java.util.prefs.Preferences;
+import javax.swing.JComponent;
+import javax.swing.JFrame;
+import javax.swing.JOptionPane;
+import javax.swing.KeyStroke;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.FlatLightLaf;
@@ -27,6 +31,7 @@ import com.formdev.flatlaf.IntelliJTheme;
 import com.formdev.flatlaf.demo.intellijthemes.IJThemesPanel;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.StringUtils;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * @author Karl Tauber
@@ -35,6 +40,7 @@ public class DemoPrefs
 {
 	public static final String KEY_LAF = "laf";
 	public static final String KEY_LAF_THEME = "lafTheme";
+	public static final String KEY_SYSTEM_SCALE_FACTOR = "systemScaleFactor";
 
 	public static final String RESOURCE_PREFIX = "res:";
 	public static final String FILE_PREFIX = "file:";
@@ -96,4 +102,66 @@ public class DemoPrefs
 				state.put( KEY_LAF, UIManager.getLookAndFeel().getClass().getName() );
 		} );
 	}
+
+	public static void initSystemScale() {
+		if( System.getProperty( "sun.java2d.uiScale" ) == null ) {
+			String scaleFactor = getState().get( KEY_SYSTEM_SCALE_FACTOR, null );
+			if( scaleFactor != null )
+				System.setProperty( "sun.java2d.uiScale", scaleFactor );
+		}
+	}
+
+	/**
+	 * register Alt+Shift+F1, F2, ... F12 keys to change system scale factor
+	 */
+	public static void registerSystemScaleFactors( JFrame frame ) {
+		registerSystemScaleFactor( frame, "alt shift F1", null );
+		registerSystemScaleFactor( frame, "alt shift F2", "1" );
+
+		if( SystemInfo.isWindows ) {
+			registerSystemScaleFactor( frame, "alt shift F3", "1.25" );
+			registerSystemScaleFactor( frame, "alt shift F4", "1.5" );
+			registerSystemScaleFactor( frame, "alt shift F5", "1.75" );
+			registerSystemScaleFactor( frame, "alt shift F6", "2" );
+			registerSystemScaleFactor( frame, "alt shift F7", "2.25" );
+			registerSystemScaleFactor( frame, "alt shift F8", "2.5" );
+			registerSystemScaleFactor( frame, "alt shift F9", "2.75" );
+			registerSystemScaleFactor( frame, "alt shift F10", "3" );
+			registerSystemScaleFactor( frame, "alt shift F11", "3.5" );
+			registerSystemScaleFactor( frame, "alt shift F12", "4" );
+		} else {
+			// Java on macOS and Linux supports only integer scale factors
+			registerSystemScaleFactor( frame, "alt shift F3", "2" );
+			registerSystemScaleFactor( frame, "alt shift F4", "3" );
+			registerSystemScaleFactor( frame, "alt shift F5", "4" );
+
+		}
+	}
+
+	private static void registerSystemScaleFactor( JFrame frame, String keyStrokeStr, String scaleFactor ) {
+		KeyStroke keyStroke = KeyStroke.getKeyStroke( keyStrokeStr );
+		if( keyStroke == null )
+			throw new IllegalArgumentException( "Invalid key stroke '" + keyStrokeStr + "'" );
+
+		((JComponent)frame.getContentPane()).registerKeyboardAction(
+			e -> applySystemScaleFactor( frame, scaleFactor ),
+			keyStroke,
+			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
+	}
+
+	private static void applySystemScaleFactor( JFrame frame, String scaleFactor ) {
+		if( JOptionPane.showConfirmDialog( frame,
+				"Change system scale factor to "
+				+ (scaleFactor != null ? scaleFactor : "default")
+				+ " and exit?",
+				frame.getTitle(), JOptionPane.YES_NO_OPTION ) != JOptionPane.YES_OPTION )
+			return;
+
+		if( scaleFactor != null )
+			DemoPrefs.getState().put( KEY_SYSTEM_SCALE_FACTOR, scaleFactor );
+		else
+			DemoPrefs.getState().remove( KEY_SYSTEM_SCALE_FACTOR );
+
+		System.exit( 0 );
+	}
 }

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

@@ -70,9 +70,10 @@ public class FlatLafDemo
 		if( FlatLafDemo.screenshotsMode && !SystemInfo.isJava_9_orLater && System.getProperty( "flatlaf.uiScale" ) == null )
 			System.setProperty( "flatlaf.uiScale", "2x" );
 
-		SwingUtilities.invokeLater( () -> {
+		DemoPrefs.init( PREFS_ROOT_PATH );
-			DemoPrefs.init( PREFS_ROOT_PATH );
+		DemoPrefs.initSystemScale();
 
+		SwingUtilities.invokeLater( () -> {
 			// install fonts for lazy loading
 			FlatInterFont.installLazy();
 			FlatJetBrainsMonoFont.installLazy();

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

@@ -36,6 +36,8 @@ import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.FlatLightLaf;
 import com.formdev.flatlaf.extras.FlatInspector;
 import com.formdev.flatlaf.extras.components.FlatTriStateCheckBox;
+import com.formdev.flatlaf.themes.FlatMacDarkLaf;
+import com.formdev.flatlaf.themes.FlatMacLightLaf;
 import com.formdev.flatlaf.ui.FlatLineBorder;
 import com.formdev.flatlaf.util.SystemInfo;
 import net.miginfocom.swing.*;
@@ -161,6 +163,8 @@ public class FlatNativeWindowBorderTest
 		registerSwitchToLookAndFeel( "F2", FlatDarkLaf.class.getName() );
 		registerSwitchToLookAndFeel( "F3", FlatIntelliJLaf.class.getName() );
 		registerSwitchToLookAndFeel( "F4", FlatDarculaLaf.class.getName() );
+		registerSwitchToLookAndFeel( "F5", FlatMacLightLaf.class.getName() );
+		registerSwitchToLookAndFeel( "F6", FlatMacDarkLaf.class.getName() );
 
 		registerSwitchToLookAndFeel( "F8", FlatTestLaf.class.getName() );
 
@@ -170,8 +174,8 @@ public class FlatNativeWindowBorderTest
 			registerSwitchToLookAndFeel( "F9", "com.apple.laf.AquaLookAndFeel" );
 		else if( SystemInfo.isLinux )
 			registerSwitchToLookAndFeel( "F9", "com.sun.java.swing.plaf.gtk.GTKLookAndFeel" );
-		registerSwitchToLookAndFeel( "F12", MetalLookAndFeel.class.getName() );
 		registerSwitchToLookAndFeel( "F11", NimbusLookAndFeel.class.getName() );
+		registerSwitchToLookAndFeel( "F12", MetalLookAndFeel.class.getName() );
 	}
 
 	private void updateInfo() {

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

@@ -22,13 +22,13 @@ import java.awt.Dimension;
 import java.awt.EventQueue;
 import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
-import java.awt.event.KeyEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import javax.swing.JButton;
 import javax.swing.JComponent;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
+import javax.swing.JScrollPane;
 import javax.swing.KeyStroke;
 import javax.swing.UIManager;
 import javax.swing.plaf.metal.MetalLookAndFeel;
@@ -42,6 +42,8 @@ import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.demo.DemoPrefs;
 import com.formdev.flatlaf.extras.FlatInspector;
 import com.formdev.flatlaf.extras.FlatUIDefaultsInspector;
+import com.formdev.flatlaf.themes.FlatMacDarkLaf;
+import com.formdev.flatlaf.themes.FlatMacLightLaf;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 import net.miginfocom.swing.MigLayout;
@@ -63,8 +65,9 @@ public class FlatSingleComponentTest
 
 	public static void main( String[] args ) {
 		DemoPrefs.init( PREFS_ROOT_PATH );
+		DemoPrefs.initSystemScale();
 
-		// set scale factor
+		// set user scale factor
 		if( System.getProperty( FlatSystemProperties.UI_SCALE ) == null ) {
 			String scaleFactor = DemoPrefs.getState().get( KEY_SCALE_FACTOR, null );
 			if( scaleFactor != null )
@@ -95,7 +98,8 @@ public class FlatSingleComponentTest
 		JComponent c = createSingleComponent();
 
 		Container contentPane = getContentPane();
-		contentPane.setLayout( new MigLayout( null, null, "[][grow]") );
+		contentPane.setLayout( new MigLayout( null, null,
+			c instanceof JScrollPane ? "[grow,fill][]" : "[][grow]" ) );
 		contentPane.add( c );
 
 		infoLabel = new JLabel();
@@ -107,6 +111,8 @@ public class FlatSingleComponentTest
 		registerSwitchToLookAndFeel( "F2", FlatDarkLaf.class.getName() );
 		registerSwitchToLookAndFeel( "F3", FlatIntelliJLaf.class.getName() );
 		registerSwitchToLookAndFeel( "F4", FlatDarculaLaf.class.getName() );
+		registerSwitchToLookAndFeel( "F5", FlatMacLightLaf.class.getName() );
+		registerSwitchToLookAndFeel( "F6", FlatMacDarkLaf.class.getName() );
 
 		registerSwitchToLookAndFeel( "F8", FlatTestLaf.class.getName() );
 
@@ -116,42 +122,37 @@ public class FlatSingleComponentTest
 			registerSwitchToLookAndFeel( "F9", "com.apple.laf.AquaLookAndFeel" );
 		else if( SystemInfo.isLinux )
 			registerSwitchToLookAndFeel( "F9", "com.sun.java.swing.plaf.gtk.GTKLookAndFeel" );
-		registerSwitchToLookAndFeel( "F12", MetalLookAndFeel.class.getName() );
 		registerSwitchToLookAndFeel( "F11", NimbusLookAndFeel.class.getName() );
+		registerSwitchToLookAndFeel( "F12", MetalLookAndFeel.class.getName() );
 
-		// register Alt+F1, F2, ... keys to change scale factor
+		// register Alt+F1, F2, ... keys to change user scale factor
-		registerScaleFactor( "alt F1", "1" );
+		registerScaleFactor( "alt F1", null );
-		registerScaleFactor( "alt F2", "1.25" );
+		registerScaleFactor( "alt F2", "1" );
-		registerScaleFactor( "alt F3", "1.5" );
+		registerScaleFactor( "alt F3", "1.25" );
-		registerScaleFactor( "alt F4", "1.75" );
+		registerScaleFactor( "alt F4", "1.5" );
-		registerScaleFactor( "alt F5", "2" );
+		registerScaleFactor( "alt F5", "1.75" );
-		registerScaleFactor( "alt F6", "2.5" );
+		registerScaleFactor( "alt F6", "2" );
-		registerScaleFactor( "alt F7", "3" );
+		registerScaleFactor( "alt F7", "2.5" );
-		registerScaleFactor( "alt F8", "3.5" );
+		registerScaleFactor( "alt F8", "3" );
-		registerScaleFactor( "alt F9", "4" );
+		registerScaleFactor( "alt F9", "3.5" );
-		registerScaleFactor( "alt F10", "5" );
+		registerScaleFactor( "alt F10", "4" );
-		registerScaleFactor( "alt F11", "6" );
+		registerScaleFactor( "alt F11", "5" );
-		registerScaleFactor( "alt F12", null );
+		registerScaleFactor( "alt F12", "6" );
+
+		// register Alt+Shift+F1, F2, ... keys to change system scale factor
+		DemoPrefs.registerSystemScaleFactors( this );
 
 		// register Alt+R key to toggle component orientation
-		((JComponent)getContentPane()).registerKeyboardAction(
+		registerKey( "alt R", () -> {
-			e -> {
+			applyComponentOrientation( getComponentOrientation().isLeftToRight()
-				applyComponentOrientation( getComponentOrientation().isLeftToRight()
+				? ComponentOrientation.RIGHT_TO_LEFT
-					? ComponentOrientation.RIGHT_TO_LEFT
+				: ComponentOrientation.LEFT_TO_RIGHT );
-					: ComponentOrientation.LEFT_TO_RIGHT );
+			revalidate();
-				revalidate();
+			repaint();
-				repaint();
+		} );
-			},
-			KeyStroke.getKeyStroke( "alt R" ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 
 		// register ESC key to close frame
-		((JComponent)getContentPane()).registerKeyboardAction(
+		registerKey( "ESCAPE", () -> dispose() );
-			e -> {
-				dispose();
-			},
-			KeyStroke.getKeyStroke( KeyEvent.VK_ESCAPE, 0, false ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 
 		// update info
 		addWindowListener( new WindowAdapter() {
@@ -199,19 +200,23 @@ public class FlatSingleComponentTest
 			+ ")" );
 	}
 
-	private void registerSwitchToLookAndFeel( String keyStrokeStr, String lafClassName ) {
+	private void registerKey( String keyStrokeStr, Runnable runnable ) {
 		KeyStroke keyStroke = KeyStroke.getKeyStroke( keyStrokeStr );
 		if( keyStroke == null )
 			throw new IllegalArgumentException( "Invalid key stroke '" + keyStrokeStr + "'" );
 
 		((JComponent)getContentPane()).registerKeyboardAction(
 			e -> {
-				applyLookAndFeel( lafClassName );
+				runnable.run();
 			},
 			keyStroke,
 			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 	}
 
+	private void registerSwitchToLookAndFeel( String keyStrokeStr, String lafClassName ) {
+		registerKey( keyStrokeStr, () -> applyLookAndFeel( lafClassName ) );
+	}
+
 	private void applyLookAndFeel( String lafClassName ) {
 		try {
 			UIManager.setLookAndFeel( lafClassName );
@@ -222,16 +227,7 @@ public class FlatSingleComponentTest
 	}
 
 	private void registerScaleFactor( String keyStrokeStr, String scaleFactor ) {
-		KeyStroke keyStroke = KeyStroke.getKeyStroke( keyStrokeStr );
+		registerKey( keyStrokeStr, () -> applyScaleFactor( scaleFactor ) );
-		if( keyStroke == null )
-			throw new IllegalArgumentException( "Invalid key stroke '" + keyStrokeStr + "'" );
-
-		((JComponent)getContentPane()).registerKeyboardAction(
-			e -> {
-				applyScaleFactor( scaleFactor );
-			},
-			keyStroke,
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 	}
 
 	private void applyScaleFactor( String scaleFactor ) {

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

@@ -19,7 +19,6 @@ package com.formdev.flatlaf.testing;
 import java.awt.*;
 import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
-import java.awt.event.KeyEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.io.FileInputStream;
@@ -81,6 +80,7 @@ public class FlatTestFrame
 //		System.setProperty( "awt.useSystemAAFontSettings", "off" );
 
 		DemoPrefs.init( PREFS_ROOT_PATH );
+		DemoPrefs.initSystemScale();
 
 		// set scale factor
 		if( System.getProperty( FlatSystemProperties.UI_SCALE ) == null ) {
@@ -169,41 +169,23 @@ public class FlatTestFrame
 			registerSwitchToLookAndFeel( "F9", "com.apple.laf.AquaLookAndFeel" );
 		else if( SystemInfo.isLinux )
 			registerSwitchToLookAndFeel( "F9", "com.sun.java.swing.plaf.gtk.GTKLookAndFeel" );
-		registerSwitchToLookAndFeel( "F12", MetalLookAndFeel.class.getName() );
 		registerSwitchToLookAndFeel( "F11", NimbusLookAndFeel.class.getName() );
+		registerSwitchToLookAndFeel( "F12", MetalLookAndFeel.class.getName() );
+
+		// register Alt+Shift+F1, F2, ... keys to change system scale factor
+		DemoPrefs.registerSystemScaleFactors( this );
 
 		// register Ctrl+0, Ctrl++ and Ctrl+- to change font size
-		int menuShortcutKeyMask = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
+		registerKey( SystemInfo.isMacOS ? "meta 0" : "ctrl 0", () -> restoreFont() );
-		((JComponent)getContentPane()).registerKeyboardAction(
+		registerKey( SystemInfo.isMacOS ? "meta PLUS" : "ctrl PLUS", () -> incrFont() );
-			e -> restoreFont(),
+		registerKey( SystemInfo.isMacOS ? "meta MINUS" : "ctrl MINUS", () -> decrFont() );
-			KeyStroke.getKeyStroke( KeyEvent.VK_0, menuShortcutKeyMask ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
-		((JComponent)getContentPane()).registerKeyboardAction(
-			e -> incrFont(),
-			KeyStroke.getKeyStroke( KeyEvent.VK_PLUS, menuShortcutKeyMask ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
-		((JComponent)getContentPane()).registerKeyboardAction(
-			e -> decrFont(),
-			KeyStroke.getKeyStroke( KeyEvent.VK_MINUS, menuShortcutKeyMask ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 
 		// register Alt+UP and Alt+DOWN to switch to previous/next theme
-		((JComponent)getContentPane()).registerKeyboardAction(
+		registerKey( "alt UP", () -> themesPanel.selectPreviousTheme() );
-			e -> themesPanel.selectPreviousTheme(),
+		registerKey( "alt DOWN", () -> themesPanel.selectNextTheme() );
-			KeyStroke.getKeyStroke( KeyEvent.VK_UP, KeyEvent.ALT_DOWN_MASK ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
-		((JComponent)getContentPane()).registerKeyboardAction(
-			e -> themesPanel.selectNextTheme(),
-			KeyStroke.getKeyStroke( KeyEvent.VK_DOWN, KeyEvent.ALT_DOWN_MASK ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 
 		// register ESC key to close frame
-		((JComponent)getContentPane()).registerKeyboardAction(
+		registerKey( "ESCAPE", () -> dispose() );
-			e -> {
-				dispose();
-			},
-			KeyStroke.getKeyStroke( KeyEvent.VK_ESCAPE, 0, false ),
-			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 
 		// make the "close" button the default button
 		getRootPane().setDefaultButton( closeButton );
@@ -274,19 +256,23 @@ public class FlatTestFrame
 			setTitle( newTitle );
 	}
 
-	private void registerSwitchToLookAndFeel( String keyStrokeStr, String lafClassName ) {
+	private void registerKey( String keyStrokeStr, Runnable runnable ) {
 		KeyStroke keyStroke = KeyStroke.getKeyStroke( keyStrokeStr );
 		if( keyStroke == null )
 			throw new IllegalArgumentException( "Invalid key stroke '" + keyStrokeStr + "'" );
 
 		((JComponent)getContentPane()).registerKeyboardAction(
 			e -> {
-				selectLookAndFeel( lafClassName );
+				runnable.run();
 			},
 			keyStroke,
 			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 	}
 
+	private void registerSwitchToLookAndFeel( String keyStrokeStr, String lafClassName ) {
+		registerKey( keyStrokeStr, () -> selectLookAndFeel( lafClassName ) );
+	}
+
 	private void loadLafs( DefaultComboBoxModel<LookAndFeelInfo> lafModel ) {
 		Properties properties = new Properties();
 		try( InputStream in = new FileInputStream( "lafs.properties" ) ) {