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