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 /* @test
  25  * @bug 4743225
  26  * @summary Size of JComboBox list is wrong when list is populated via PopupMenuListener
  27  * @author Alexander Potochkin
  28  */
  29 
  30 import sun.awt.SunToolkit;
  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.Toolkit;
  43 import java.awt.event.InputEvent;
  44 
  45 public class bug4743225 extends JFrame {
  46 
  47     private static JComboBox cb;
  48     private static volatile boolean flag;
  49 
  50     public bug4743225() {
  51         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  52         setLayout(new FlowLayout());
  53         cb = new JComboBox(new Object[] {"one", "two", "three"});
  54         cb.addPopupMenuListener(new PopupMenuListener() {
  55             public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
  56                 cb.addItem("Test");
  57             }
  58 
  59             public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
  60             }
  61 
  62             public void popupMenuCanceled(PopupMenuEvent e) {
  63             }
  64         });
  65         add(cb);
  66         pack();
  67     }
  68 
  69     public static BasicComboPopup getPopup() {
  70         AccessibleContext c = cb.getAccessibleContext();
  71         for(int i = 0; i < c.getAccessibleChildrenCount(); i ++) {
  72             if (c.getAccessibleChild(i) instanceof BasicComboPopup) {
  73                 return (BasicComboPopup) c.getAccessibleChild(i);
  74             }
  75         }
  76         throw new AssertionError("No BasicComboPopup found");
  77     }
  78 
  79     public static void main(String... args) throws Exception {
  80 
  81         Robot robot = new Robot();
  82         robot.setAutoDelay(20);
  83         SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
  84 
  85         SwingUtilities.invokeAndWait(new Runnable() {
  86             public void run() {
  87                 new bug4743225().setVisible(true);
  88             }
  89         });
  90         toolkit.realSync();
  91 
  92         // calling this method from main thread is ok
  93         Point point = cb.getLocationOnScreen();
  94         robot.mouseMove(point.x + 10, point.y + 10);
  95         robot.mousePress(InputEvent.BUTTON1_MASK);
  96         robot.mouseRelease(InputEvent.BUTTON1_MASK);
  97         toolkit.realSync();
  98 
  99         SwingUtilities.invokeAndWait(new Runnable() {
 100             public void run() {
 101                 if(getPopup().getList().getLastVisibleIndex() == 3) {
 102                     flag = true;
 103                 }
 104             }
 105         });
 106 
 107         if (!flag) {
 108             throw new RuntimeException("The ComboBox popup wasn't correctly updated");
 109         }
 110     }
 111 }