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/*
* Copyright (c) 2001, 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.
*/
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Panel;
import java.awt.Robot;
import java.util.concurrent.atomic.AtomicInteger;
/*
* @test
* @bug 4394287
* @key headful
* @summary Paint pending on heavyweight component move
*/
public class RepaintTest {
private static Frame frame;
private static Panel panel;
private static volatile IncrementComponent counter;
public static void main(String[] args) throws Exception {
try {
Robot robot = new Robot();
EventQueue.invokeAndWait(RepaintTest::createAndShowUI);
robot.waitForIdle();
robot.delay(1000);
EventQueue.invokeAndWait(() -> panel.setLocation(panel.getX() + 10,
panel.getY() + 10));
robot.waitForIdle();
robot.delay(500);
int count = counter.getCount().get();
EventQueue.invokeAndWait(panel::repaint);
robot.waitForIdle();
robot.delay(1000);
if (counter.getCount().get() == count) {
throw new RuntimeException("Failed");
}
} finally {
EventQueue.invokeAndWait(() -> {
if (frame != null) {
frame.dispose();
}
});
}
}
private static void createAndShowUI() {
frame = new MyFrame("Repaint Test");
frame.setLayout(null);
counter = new IncrementComponent();
panel = new Panel();
panel.add(counter);
frame.add(panel);
panel.setBounds(0, 0, 100, 100);
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static class MyFrame extends Frame {
public MyFrame(String title) {
super(title);
}
public void update(Graphics g) {
System.out.println("UPDATE: " + g.getClipBounds());
super.update(g);
}
public void paint(Graphics g) {
System.out.println("PAINT: " + g.getClipBounds());
super.paint(g);
}
}
// Subclass of Component, everytime paint is invoked a counter
// is incremented, this counter is displayed in the component.
private static class IncrementComponent extends Component {
private static final AtomicInteger paintCount = new AtomicInteger(0);
public Dimension getPreferredSize() {
return new Dimension(100, 100);
}
public AtomicInteger getCount() {
return paintCount;
}
public void paint(Graphics g) {
g.setColor(Color.red);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.white);
String string = Integer.toString(paintCount.getAndIncrement());
FontMetrics metrics = g.getFontMetrics();
int x = (getWidth() - metrics.stringWidth(string)) / 2;
int y = (getHeight() + metrics.getHeight()) / 2;
g.drawString(string, x, y);
}
}
}
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