Demo: auto-reload current theme in development environment if .proper…

…ties files have changed
JFormDesigner · Aug 9, 2023 · 810146b · 810146b
1 parent 9309166
commit 810146b
Showing 1 changed file with 48 additions and 1 deletion.
diff --git a/flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/intellijthemes/IJThemesPanel.java b/flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/intellijthemes/IJThemesPanel.java
@@ -32,6 +32,7 @@
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
+import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
 import java.util.ArrayList;
@@ -82,6 +83,7 @@ public void windowActivated( WindowEvent e ) {
 
 	private File lastDirectory;
 	private boolean isAdjustingThemesList;
+	private long lastLafChangeTime = System.currentTimeMillis();
 
 	public IJThemesPanel() {
 		initComponents();
@@ -410,14 +412,59 @@ public void removeNotify() {
 	}
 
 	private void lafChanged( PropertyChangeEvent e ) {
-		if( "lookAndFeel".equals( e.getPropertyName() ) )
+		if( "lookAndFeel".equals( e.getPropertyName() ) ) {
 			selectedCurrentLookAndFeel();
+			lastLafChangeTime = System.currentTimeMillis();
+		}
 	}
 
 	private void windowActivated() {
 		// refresh themes list on window activation
 		if( themesManager.hasThemesFromDirectoryChanged() )
 			updateThemesList();
+		else {
+			// check whether core .properties files of current Laf have changed
+			// in development environment since last Laf change and reload theme
+			LookAndFeel laf = UIManager.getLookAndFeel();
+			if( laf instanceof FlatLaf ) {
+				List<Class<?>> lafClasses = new ArrayList<>();
+
+				if( laf instanceof IntelliJTheme.ThemeLaf ) {
+					boolean dark = ((FlatLaf)laf).isDark();
+					lafClasses.add( FlatLaf.class );
+					lafClasses.add( dark ? FlatDarkLaf.class : FlatLightLaf.class );
+					lafClasses.add( dark ? FlatDarculaLaf.class : FlatIntelliJLaf.class );
+					lafClasses.add( IntelliJTheme.ThemeLaf.class );
+				} else {
+					for( Class<?> lafClass = laf.getClass();
+						FlatLaf.class.isAssignableFrom( lafClass );
+						lafClass = lafClass.getSuperclass() )
+					{
+						lafClasses.add( 0, lafClass );
+					}
+				}
+
+				boolean reload = false;
+				for( Class<?> lafClass : lafClasses ) {
+					String propertiesName = '/' + lafClass.getName().replace( '.', '/' ) + ".properties";
+					URL url = lafClass.getResource( propertiesName );
+					if( url != null && "file".equals( url.getProtocol() ) ) {
+						try {
+							File file = new File( url.toURI() );
+							if( file.lastModified() > lastLafChangeTime ) {
+								reload = true;
+								break;
+							}
+						} catch( URISyntaxException ex ) {
+							// ignore
+						}
+					}
+				}
+
+				if( reload )
+					setTheme( themesList.getSelectedValue() );
+			}
+		}
 	}
 
 	private void selectedCurrentLookAndFeel() {