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/*
* Copyright (c) 1999, 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.
*/
/*
* Licensed Materials - Property of IBM
*
* (C) Copyright IBM Corporation 1998 All Rights Reserved.
*
* US Government Users Restricted Rights - Use, duplication or disclosure
* restricted by GSA ADP Schedule Contract with IBM Corp.
*/
/*
* @test
* @bug 4160721
* @summary AWT ScrollPane painting problem
* @library /java/awt/regtesthelpers
* @build PassFailJFrame
* @run main/manual ScrollPanePaint
*/
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.ScrollPane;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
public class ScrollPanePaint {
public static void main(String[] args) throws Exception {
String INSTRUCTIONS = """
1. Press the button marked "Toggle" a few times.
2. The contents of the frame should alternate between
a red panel and a scroll pane containing a green panel.
If this does not happen (specifically, if the scroll
pane does not consistently contain a green panel),
then the test has FAILED.
""";
ScrollPaintTest scrollPaintTest = new ScrollPaintTest();
PassFailJFrame.builder()
.title("Test Instructions")
.instructions(INSTRUCTIONS)
.columns(35)
.testUI(scrollPaintTest::initialize)
.positionTestUI(WindowLayouts::rightOneColumn)
.build()
.awaitAndCheck();
}
private static class ScrollPaintTest implements ActionListener {
static Frame f;
static boolean showScroll;
public List<Frame> initialize() {
Frame frame = new Frame("Scrollpane paint test");
frame.setLayout(new BorderLayout());
f = new Frame("Scrollpane paint test");
f.setLayout(new GridLayout(0, 1));
Button b = new Button("Toggle");
b.addActionListener(this);
frame.add(b, BorderLayout.CENTER);
frame.pack();
showScroll = false;
actionPerformed(null);
return List.of(frame, f);
}
public void actionPerformed(ActionEvent e) {
Container c;
if (!showScroll) {
c = (Container) new TestPanel(new Dimension(100, 100));
c.setBackground(Color.red);
} else {
c = new ScrollPane(ScrollPane.SCROLLBARS_ALWAYS);
Panel p = new TestPanel(new Dimension(20, 20));
p.setBackground(Color.green);
c.add(p);
}
f.removeAll();
f.add("Center", c);
f.pack();
showScroll = !showScroll;
}
}
private static class TestPanel extends Panel {
Dimension dim;
TestPanel(Dimension d) {
dim = d;
}
public Dimension getMinimumSize() {
return getPreferredSize();
}
public Dimension getPreferredSize() {
return dim;
}
}
}
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