99 lines
3.3 KiB
Java
99 lines
3.3 KiB
Java
/*
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* Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @key headful
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* @bug 8041982
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* @summary Use of animated icon in JLayer causes CPU spin
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* @author Alexander Potochkin
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*/
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import javax.swing.*;
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import javax.swing.plaf.LayerUI;
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import java.awt.*;
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import java.beans.PropertyChangeEvent;
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public class bug8041982 extends JFrame {
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public bug8041982() {
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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add(new JLayer<>(new JPanel(), new BusyLayer()));
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setSize(200, 300);
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setVisible(true);
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}
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public static void main(String... args) throws Exception {
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SwingUtilities.invokeLater(new Runnable() {
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public void run() {
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new bug8041982().setVisible(true);
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}
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});
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Thread.sleep(5000);
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}
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private class BusyLayer extends LayerUI<JComponent> {
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private volatile boolean animated = true;
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private Icon icon = new ImageIcon(bug8041982.class.getResource("duke.gif"));
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private int imageUpdateCount;
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@Override
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public void paint(Graphics g, JComponent c) {
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super.paint(g, c);
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if (isAnimated()) {
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icon.paintIcon(c, g, c.getWidth() / 2 - icon.getIconWidth() /
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2,
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c.getHeight() / 2 - icon.getIconHeight() / 2);
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}
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}
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public boolean isAnimated() {
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return animated;
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}
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public void setAnimated(boolean animated) {
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if (this.animated != animated) {
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this.animated = animated;
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firePropertyChange("animated", !animated, animated);
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}
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}
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@Override
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public void applyPropertyChange(PropertyChangeEvent evt, JLayer l) {
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// this will be called when the busy flag is changed
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l.repaint();
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}
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@Override
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public boolean imageUpdate(Image img, int infoflags, int x, int y, int w, int h, JLayer<? extends JComponent> l) {
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System.out.println("imageUpdate " + imageUpdateCount);
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if (imageUpdateCount++ == 100) {
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setAnimated(false);
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} else if (imageUpdateCount > 100) {
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throw new RuntimeException("Test failed");
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}
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return isAnimated() && super.imageUpdate(img, infoflags, x, y, w, h, l);
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}
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}
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}
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