110 lines
3.6 KiB
Java
110 lines
3.6 KiB
Java
/*
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* Copyright (c) 2002, 2023, 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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@bug 4147740
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@summary Tests that AbstractButton does not update images it doesn't use
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@key headful
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@run main bug4147740
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*/
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import java.awt.Image;
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import javax.swing.JButton;
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import javax.swing.JFrame;
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import javax.swing.ImageIcon;
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import java.awt.Robot;
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import javax.swing.SwingUtilities;
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import java.awt.event.HierarchyEvent;
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import java.awt.event.HierarchyListener;
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public class bug4147740 {
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static JButton b;
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static JFrame frame;
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static volatile boolean imageUpdated = false;
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static volatile boolean shouldUpdate = true;
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public static void main(String[] args) throws Exception {
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Robot robot = new Robot();
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try {
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SwingUtilities.invokeAndWait(() -> {
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frame = new JFrame("bug4147740");
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b = new AnimatedButton();
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frame.getContentPane().add(b);
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b.addHierarchyListener(new Listener());
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frame.setSize(200, 200);
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frame.setLocationRelativeTo(null);
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frame.setVisible(true);
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});
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robot.waitForIdle();
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robot.delay(1000);
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} finally {
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SwingUtilities.invokeAndWait(() -> {
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if (frame != null) {
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frame.dispose();
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}
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});
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}
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}
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static class Listener implements HierarchyListener {
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public void hierarchyChanged(HierarchyEvent ev) {
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if ((ev.getChangeFlags() | HierarchyEvent.SHOWING_CHANGED) != 0 &&
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frame.isShowing()) {
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frame.repaint();
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SwingUtilities.invokeLater(new Runnable() {
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public void run() {
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synchronized(b) {
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b.setEnabled(false);
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shouldUpdate = false;
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}
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}
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});
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}
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}
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}
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static class AnimatedButton extends JButton {
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boolean shouldNotUpdate = false;
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AnimatedButton() {
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super();
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setIcon(new ImageIcon("animated.gif"));
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setDisabledIcon(new ImageIcon("static.gif"));
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}
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public boolean imageUpdate(Image img, int infoflags,
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int x, int y, int w, int h) {
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boolean updated;
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synchronized(b) {
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updated = super.imageUpdate(img, infoflags, x, y, w, h);
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if (!shouldUpdate && updated) {
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throw new RuntimeException("Failed: unused image is being updated");
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}
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}
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return updated;
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}
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}
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}
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