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 
  39     private static void createGui() {
  40         final JFrame frame = new JFrame();
  41         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  42 
  43         DefaultListModel dlm = new DefaultListModel();
  44         for (int i = 0; i < 100; i++)
  45           dlm
  46             .addElement(i + " listItemlistItemlistItemlistItemItem");
  47         JList l = new JList();
  48         l.setModel(dlm);
  49         s = new JScrollPane(l);
  50         l.setSelectedIndex(50);
  51         l.ensureIndexIsVisible(50);
  52 
  53         frame.add(s);
  54         frame.setSize(200, 200);
  55         frame.setLocationRelativeTo(null);
  56         frame.setVisible(true);
  57     }
  58 
  59     public static void main(String[] args) throws Exception {
  60         Robot robot = new Robot();
  61         robot.setAutoDelay(10);
  62         SwingUtilities.invokeAndWait(new Runnable() {
  63             public void run() {
  64                 bug6510999.createGui();
  65             }
  66         });
  67         robot.waitForIdle();
  68         Point viewPosition = s.getViewport().getViewPosition();
  69         robot.keyPress(KeyEvent.VK_DOWN);
  70         robot.keyRelease(KeyEvent.VK_DOWN);
  71         robot.waitForIdle();
  72         if (!s.getViewport().getViewPosition().equals(viewPosition)) {
  73             throw new RuntimeException("JScrollPane was unexpectedly scrolled");
  74         }
  75     }
  76 }