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/*
* Copyright (c) 1999, 2024, 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 4243479
* @summary Tests that JViewport do not blit when not visible
* @library /java/awt/regtesthelpers
* @build PassFailJFrame
* @run main/manual bug4243479
*/
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.FlowLayout;
import java.awt.Point;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JViewport;
public class bug4243479 {
private static final String INSTRUCTIONS = """
The tabbed pane contains two tabs: "button" and "scrollpane".
The second contains some text inserted into a scrollpane.
Press the "Press here" button.
If a piece of scrollpane appears, press Fail else press Pass.""";
private static JFrame createTestUI() {
char[] text = new char[20000];
for (int counter = 0; counter < text.length; counter++) {
if (counter % 80 == 0) {
text[counter] = '\n';
}
else {
text[counter] = 'a';
}
}
JScrollPane sp = new JScrollPane(new JTextArea
(new String(text)));
final JViewport vp = sp.getViewport();
vp.putClientProperty("EnableWindowBlit", Boolean.TRUE);
JTabbedPane tp = new JTabbedPane();
JPanel panel = new JPanel(new FlowLayout());
JButton button = new JButton("Press here");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
Point location = vp.getViewPosition();
location.y += 100;
vp.setViewPosition(location);
}
});
panel.add(button);
tp.add("button", panel);
tp.add("scrollpane", sp);
JFrame frame = new JFrame("4243479 Test");
frame.getContentPane().add(tp);
frame.pack();
return frame;
}
public static void main(String[] argv) throws Exception {
PassFailJFrame.builder()
.title("JViewport Instructions")
.instructions(INSTRUCTIONS)
.rows(5)
.columns(30)
.position(PassFailJFrame.Position.TOP_LEFT_CORNER)
.testUI(bug4243479::createTestUI)
.build()
.awaitAndCheck();
}
}
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