moved ScaledSVGIcon.java from demo to flatlaf-extras and renamed to FlatSVGIcon.java

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

@@ -0,0 +1,136 @@
+/*
+ * Copyright 2019 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
+ *
+ *     http://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.extras;
+
+import java.awt.Component;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.net.URISyntaxException;
+import java.net.URL;
+import javax.swing.ImageIcon;
+import javax.swing.LookAndFeel;
+import javax.swing.UIManager;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.UIScale;
+import com.kitfox.svg.app.beans.SVGIcon;
+
+/**
+ * @author Karl Tauber
+ */
+public class FlatSVGIcon
+	extends ImageIcon
+{
+	private final String name;
+	private final SVGIcon svgIcon;
+	private boolean dark;
+
+	public FlatSVGIcon( String name ) {
+		this.name = name;
+
+		svgIcon = new SVGIcon();
+		svgIcon.setAntiAlias( true );
+	}
+
+	private void update() {
+		if( dark == isDarkLaf() && svgIcon.getSvgURI() != null )
+			return;
+
+		dark = isDarkLaf();
+		URL url = getIconURL( name, dark );
+		if( url == null & dark )
+			url = getIconURL( name, false );
+
+		try {
+			svgIcon.setSvgURI( url.toURI() );
+		} catch( URISyntaxException ex ) {
+			ex.printStackTrace();
+		}
+	}
+
+	private URL getIconURL( String name, boolean dark ) {
+		if( dark ) {
+			int dotIndex = name.lastIndexOf( '.' );
+			name = name.substring( 0, dotIndex ) + "_dark" + name.substring( dotIndex );
+		}
+		return FlatSVGIcon.class.getClassLoader().getResource( name );
+	}
+
+	@Override
+	public int getIconWidth() {
+		update();
+		return UIScale.scale( svgIcon.getIconWidth() );
+	}
+
+	@Override
+	public int getIconHeight() {
+		update();
+		return UIScale.scale( svgIcon.getIconHeight() );
+	}
+
+	@Override
+	public void paintIcon( Component c, Graphics g, int x, int y ) {
+		update();
+
+		Graphics2D g2 = (Graphics2D) g.create();
+		try {
+			FlatUIUtils.setRenderingHints( g2 );
+
+			g2.translate( x, y );
+			UIScale.scaleGraphics( g2 );
+
+			svgIcon.paintIcon( c, g2, 0, 0 );
+		} finally {
+			g2.dispose();
+		}
+	}
+
+	@Override
+	public Image getImage() {
+		update();
+
+		BufferedImage image = new BufferedImage( getIconWidth(), getIconHeight(), BufferedImage.TYPE_INT_ARGB );
+		Graphics2D g = image.createGraphics();
+		try {
+			paintIcon( null, g, 0, 0 );
+		} finally {
+			g.dispose();
+		}
+		return image;
+	}
+
+	private static Boolean darkLaf;
+
+	private static boolean isDarkLaf() {
+		if( darkLaf == null ) {
+			lafChanged();
+
+			UIManager.addPropertyChangeListener( e -> {
+				lafChanged();
+			} );
+		}
+
+		return darkLaf;
+	}
+
+	private static void lafChanged() {
+		LookAndFeel lookAndFeel = UIManager.getLookAndFeel();
+		darkLaf = (lookAndFeel instanceof FlatLaf && ((FlatLaf)lookAndFeel).isDark());
+	}
+}