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/*
* Copyright (c) 2015, 2025, 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
* @key headful
* @bug 8077409
* @summary Drawing deviates when validate() is invoked on java.awt.ScrollPane
* @run main bug8077409Test
*/
import java.awt.AWTException;
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.ScrollPane;
import java.awt.event.KeyEvent;
public class bug8077409Test extends Frame {
ScrollPane pane;
MyCanvas myCanvas;
public bug8077409Test() {
super();
setLayout(new BorderLayout());
pane = new ScrollPane();
myCanvas = new MyCanvas();
pane.add(myCanvas);
add(pane, BorderLayout.CENTER);
setSize(320, 480);
}
public static void main(String[] args) throws AWTException, InterruptedException {
final bug8077409Test obj = new bug8077409Test();
try {
obj.setLocationRelativeTo(null);
obj.setVisible(true);
Point scrollPosition = obj.pane.getScrollPosition();
scrollPosition.translate(0, 1);
obj.pane.setScrollPosition(scrollPosition);
int y = obj.pane.getComponent(0).getLocation().y;
obj.pane.validate();
if (y != obj.pane.getComponent(0).getLocation().y) {
throw new RuntimeException("Wrong position of component in ScrollPane");
}
} finally {
obj.dispose();
}
}
@Override
protected void processKeyEvent(KeyEvent e) {
super.processKeyEvent(e);
}
class MyCanvas extends Canvas {
@Override
public Dimension getPreferredSize() {
return new Dimension(400, 800);
}
@Override
public void paint(Graphics g) {
g.setColor(Color.BLACK);
g.drawLine(0, 0, 399, 0);
g.setColor(Color.RED);
g.drawLine(0, 1, 399, 1);
g.setColor(Color.BLUE);
g.drawLine(0, 2, 399, 2);
g.setColor(Color.GREEN);
g.drawLine(0, 3, 399, 3);
}
}
}
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