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/*
* Copyright (c) 2000, 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 4342129
@summary Unable to scroll in scrollpane for canvas
@key headful
*/
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.ScrollPane;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
public class ComponentScrollTest {
public ScrollPane scrollpane;
public Frame frame;
public volatile int count = 0;
public static void main(String[] args) throws Exception {
ComponentScrollTest cst = new ComponentScrollTest();
cst.init();
cst.start();
}
public void init() throws Exception {
EventQueue.invokeAndWait(() -> {
scrollpane = new ScrollPane();
frame = new Frame("Component Scroll Test");
scrollpane.add(new Component() {
public Dimension getPreferredSize() {
return new Dimension(500, 500);
}
public void paint(Graphics g) {
g.drawLine(0, 0, 500, 500);
}
});
frame.add(scrollpane);
scrollpane.getVAdjustable().addAdjustmentListener(new AdjustmentListener() {
@Override
public void adjustmentValueChanged(AdjustmentEvent adjustmentEvent) {
count++;
scrollpane.getVAdjustable().setValue(20);
}
});
frame.pack();
frame.setVisible(true);
});
}
public void start() throws Exception {
try {
EventQueue.invokeAndWait(() -> {
scrollpane.getVAdjustable().setValue(20);
});
Thread.sleep(1000);
System.out.println("Count = " + count);
if (count > 50) {
throw new RuntimeException();
}
} finally {
EventQueue.invokeAndWait(() -> {
if (frame != null) {
frame.dispose();
}
});
}
}
}
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