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/*
* Copyright (c) 2018, 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.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Point;
import java.awt.Robot;
import java.awt.event.InputEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
* @test
* @key headful
* @bug 8202768
* @summary we should not hang when lots of panels are used
*/
public final class SlowPanelIteration {
private static JFrame frame;
private static Point center = new Point();
private static volatile CountDownLatch go;
public static void main(final String[] args) throws Exception {
Robot r = new Robot();
// accessibility tool will need time to react to our clicks
r.setAutoDelay(200);
try {
EventQueue.invokeAndWait(SlowPanelIteration::showUI);
for (int i = 0; i < 10; ++i) {
go = new CountDownLatch(1);
r.mouseMove(center.x, center.y);
r.mousePress(InputEvent.BUTTON1_DOWN_MASK);
r.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
if (!go.await(10, TimeUnit.SECONDS)) {
throw new RuntimeException("Too slow operation");
}
}
} finally {
EventQueue.invokeAndWait(SlowPanelIteration::dispose);
}
}
private static void showUI() {
frame = new JFrame();
frame.setSize(new Dimension(400, 400));
frame.setLocationRelativeTo(null);
final Container content = frame.getContentPane();
content.setLayout(new BorderLayout(0, 0));
Container lastPanel = content;
for (int i = 0; i < 500; i++) {
final JPanel p = new JPanel();
p.setLayout(new BorderLayout(0, 0));
lastPanel.add(p);
lastPanel.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
System.out.println("click");
go.countDown();
}
});
lastPanel = p;
}
lastPanel.setBackground(Color.GREEN);
frame.setVisible(true);
Point loc = frame.getLocationOnScreen();
center.x = loc.x + frame.getWidth() / 2;
center.y = loc.y + frame.getHeight() / 2;
}
private static void dispose() {
if (frame != null) {
frame.dispose();
}
}
}
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