1 /*
   2  * Copyright (c) 2010, 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 /*
  25  * @test
  26  * @key headful
  27  * @bug 4743225
  28  * @summary Size of JComboBox list is wrong when list is populated via PopupMenuListener
  29  * @author Alexander Potochkin
  30  */
  31 
  32 import javax.accessibility.AccessibleContext;
  33 import javax.swing.JComboBox;
  34 import javax.swing.JFrame;
  35 import javax.swing.SwingUtilities;
  36 import javax.swing.event.PopupMenuEvent;
  37 import javax.swing.event.PopupMenuListener;
  38 import javax.swing.plaf.basic.BasicComboPopup;
  39 import java.awt.FlowLayout;
  40 import java.awt.Point;
  41 import java.awt.Robot;
  42 import java.awt.event.InputEvent;
  43 
  44 public class bug4743225 extends JFrame {
  45 
  46     private static JComboBox cb;
  47     private static volatile boolean flag;
  48 
  49     public bug4743225() {
  50         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  51         setLayout(new FlowLayout());
  52         cb = new JComboBox(new Object[] {"one", "two", "three"});
  53         cb.addPopupMenuListener(new PopupMenuListener() {
  54             public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
  55                 cb.addItem("Test");
  56             }
  57 
  58             public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
  59             }
  60 
  61             public void popupMenuCanceled(PopupMenuEvent e) {
  62             }
  63         });
  64         add(cb);
  65         pack();
  66     }
  67 
  68     public static BasicComboPopup getPopup() {
  69         AccessibleContext c = cb.getAccessibleContext();
  70         for(int i = 0; i < c.getAccessibleChildrenCount(); i ++) {
  71             if (c.getAccessibleChild(i) instanceof BasicComboPopup) {
  72                 return (BasicComboPopup) c.getAccessibleChild(i);
  73             }
  74         }
  75         throw new AssertionError("No BasicComboPopup found");
  76     }
  77 
  78     public static void main(String... args) throws Exception {
  79 
  80         Robot robot = new Robot();
  81         robot.setAutoDelay(20);
  82 
  83         SwingUtilities.invokeAndWait(new Runnable() {
  84             public void run() {
  85                 new bug4743225().setVisible(true);
  86             }
  87         });
  88         robot.waitForIdle();
  89 
  90         // calling this method from main thread is ok
  91         Point point = cb.getLocationOnScreen();
  92         robot.mouseMove(point.x + 10, point.y + 10);
  93         robot.mousePress(InputEvent.BUTTON1_MASK);
  94         robot.mouseRelease(InputEvent.BUTTON1_MASK);
  95         robot.waitForIdle();
  96 
  97         SwingUtilities.invokeAndWait(new Runnable() {
  98             public void run() {
  99                 if(getPopup().getList().getLastVisibleIndex() == 3) {
 100                     flag = true;
 101                 }
 102             }
 103         });
 104 
 105         if (!flag) {
 106             throw new RuntimeException("The ComboBox popup wasn't correctly updated");
 107         }
 108     }
 109 }