1 /*
2  * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 /*
24  * @test
25  * @key headful
26  * @bug 6510999
27  * @summary Selection in a JList with both scrollbars visible jumps on arrowkey-down
28  * @author Alexander Potochkin
29  * @run main bug6510999
30  */
31 
32 import javax.swing.*;
33 import java.awt.*;
34 import java.awt.event.KeyEvent;
35 
36 public class bug6510999 {
37     private static JScrollPane s;
38     static JFrame frame;
39 
createGui()40     private static void createGui() {
41         frame = new JFrame();
42         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
43 
44         DefaultListModel dlm = new DefaultListModel();
45         for (int i = 0; i < 100; i++)
46           dlm
47             .addElement(i + " listItemlistItemlistItemlistItemItem");
48         JList l = new JList();
49         l.setModel(dlm);
50         s = new JScrollPane(l);
51         l.setSelectedIndex(50);
52         l.ensureIndexIsVisible(50);
53 
54         frame.add(s);
55         frame.setSize(200, 200);
56         frame.setLocationRelativeTo(null);
57         frame.setVisible(true);
58     }
59 
main(String[] args)60     public static void main(String[] args) throws Exception {
61         try {
62             Robot robot = new Robot();
63             robot.setAutoDelay(10);
64             SwingUtilities.invokeAndWait(new Runnable() {
65                 public void run() {
66                     bug6510999.createGui();
67                 }
68             });
69             robot.waitForIdle();
70             Point viewPosition = s.getViewport().getViewPosition();
71             robot.keyPress(KeyEvent.VK_DOWN);
72             robot.keyRelease(KeyEvent.VK_DOWN);
73             robot.waitForIdle();
74             if (!s.getViewport().getViewPosition().equals(viewPosition)) {
75                 throw new RuntimeException("JScrollPane was unexpectedly scrolled");
76             }
77         } finally {
78             if (frame != null) SwingUtilities.invokeAndWait(() -> frame.dispose());
79         }
80     }
81 }
82