1 /* 2 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * @key headful 26 * @bug 8041982 27 * @summary Use of animated icon in JLayer causes CPU spin 28 * @author Alexander Potochkin 29 */ 30 31 import javax.swing.*; 32 import javax.swing.plaf.LayerUI; 33 import java.awt.*; 34 import java.beans.PropertyChangeEvent; 35 36 public class bug8041982 extends JFrame { 37 bug8041982()38 public bug8041982() { 39 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 40 add(new JLayer<>(new JPanel(), new BusyLayer())); 41 setSize(200, 300); 42 setVisible(true); 43 } 44 main(String... args)45 public static void main(String... args) throws Exception { 46 SwingUtilities.invokeLater(new Runnable() { 47 public void run() { 48 new bug8041982().setVisible(true); 49 } 50 }); 51 Thread.sleep(5000); 52 } 53 54 private class BusyLayer extends LayerUI<JComponent> { 55 private volatile boolean animated = true; 56 private Icon icon = new ImageIcon(bug8041982.class.getResource("duke.gif")); 57 private int imageUpdateCount; 58 59 @Override paint(Graphics g, JComponent c)60 public void paint(Graphics g, JComponent c) { 61 super.paint(g, c); 62 if (isAnimated()) { 63 icon.paintIcon(c, g, c.getWidth() / 2 - icon.getIconWidth() / 64 2, 65 c.getHeight() / 2 - icon.getIconHeight() / 2); 66 } 67 } 68 isAnimated()69 public boolean isAnimated() { 70 return animated; 71 } 72 setAnimated(boolean animated)73 public void setAnimated(boolean animated) { 74 if (this.animated != animated) { 75 this.animated = animated; 76 firePropertyChange("animated", !animated, animated); 77 } 78 } 79 80 @Override applyPropertyChange(PropertyChangeEvent evt, JLayer l)81 public void applyPropertyChange(PropertyChangeEvent evt, JLayer l) { 82 // this will be called when the busy flag is changed 83 l.repaint(); 84 } 85 86 @Override imageUpdate(Image img, int infoflags, int x, int y, int w, int h, JLayer<? extends JComponent> l)87 public boolean imageUpdate(Image img, int infoflags, int x, int y, int w, int h, JLayer<? extends JComponent> l) { 88 System.out.println("imageUpdate " + imageUpdateCount); 89 if (imageUpdateCount++ == 100) { 90 setAnimated(false); 91 } else if (imageUpdateCount > 100) { 92 throw new RuntimeException("Test failed"); 93 } 94 return isAnimated() && super.imageUpdate(img, infoflags, x, y, w, h, l); 95 } 96 } 97 } 98 99