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/*
* Copyright (c) 2002, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
@bug 4147740
@summary Tests that AbstractButton does not update images it doesn't use
@key headful
@run main bug4147740
*/
import java.awt.Image;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
import java.awt.Robot;
import javax.swing.SwingUtilities;
import java.awt.event.HierarchyEvent;
import java.awt.event.HierarchyListener;
public class bug4147740 {
static JButton b;
static JFrame frame;
static volatile boolean imageUpdated = false;
static volatile boolean shouldUpdate = true;
public static void main(String[] args) throws Exception {
Robot robot = new Robot();
try {
SwingUtilities.invokeAndWait(() -> {
frame = new JFrame("bug4147740");
b = new AnimatedButton();
frame.getContentPane().add(b);
b.addHierarchyListener(new Listener());
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
});
robot.waitForIdle();
robot.delay(1000);
} finally {
SwingUtilities.invokeAndWait(() -> {
if (frame != null) {
frame.dispose();
}
});
}
}
static class Listener implements HierarchyListener {
public void hierarchyChanged(HierarchyEvent ev) {
if ((ev.getChangeFlags() | HierarchyEvent.SHOWING_CHANGED) != 0 &&
frame.isShowing()) {
frame.repaint();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
synchronized(b) {
b.setEnabled(false);
shouldUpdate = false;
}
}
});
}
}
}
static class AnimatedButton extends JButton {
boolean shouldNotUpdate = false;
AnimatedButton() {
super();
setIcon(new ImageIcon("animated.gif"));
setDisabledIcon(new ImageIcon("static.gif"));
}
public boolean imageUpdate(Image img, int infoflags,
int x, int y, int w, int h) {
boolean updated;
synchronized(b) {
updated = super.imageUpdate(img, infoflags, x, y, w, h);
if (!shouldUpdate && updated) {
throw new RuntimeException("Failed: unused image is being updated");
}
}
return updated;
}
}
}
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