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 sun.awt.SunToolkit;
  33 
  34 import javax.accessibility.AccessibleContext;
  35 import javax.swing.JComboBox;
  36 import javax.swing.JFrame;
  37 import javax.swing.SwingUtilities;
  38 import javax.swing.event.PopupMenuEvent;
  39 import javax.swing.event.PopupMenuListener;
  40 import javax.swing.plaf.basic.BasicComboPopup;
  41 import java.awt.FlowLayout;
  42 import java.awt.Point;
  43 import java.awt.Robot;
  44 import java.awt.Toolkit;
  45 import java.awt.event.InputEvent;
  46 
  47 public class bug4743225 extends JFrame {
  48 
  49     private static JComboBox cb;
  50     private static volatile boolean flag;
  51 
  52     public bug4743225() {
  53         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  54         setLayout(new FlowLayout());
  55         cb = new JComboBox(new Object[] {"one", "two", "three"});
  56         cb.addPopupMenuListener(new PopupMenuListener() {
  57             public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
  58                 cb.addItem("Test");
  59             }
  60 
  61             public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
  62             }
  63 
  64             public void popupMenuCanceled(PopupMenuEvent e) {
  65             }
  66         });
  67         add(cb);
  68         pack();
  69     }
  70 
  71     public static BasicComboPopup getPopup() {
  72         AccessibleContext c = cb.getAccessibleContext();
  73         for(int i = 0; i < c.getAccessibleChildrenCount(); i ++) {
  74             if (c.getAccessibleChild(i) instanceof BasicComboPopup) {
  75                 return (BasicComboPopup) c.getAccessibleChild(i);
  76             }
  77         }
  78         throw new AssertionError("No BasicComboPopup found");
  79     }
  80 
  81     public static void main(String... args) throws Exception {
  82 
  83         Robot robot = new Robot();
  84         robot.setAutoDelay(20);
  85         SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
  86 
  87         SwingUtilities.invokeAndWait(new Runnable() {
  88             public void run() {
  89                 new bug4743225().setVisible(true);
  90             }
  91         });
  92         toolkit.realSync();
  93 
  94         // calling this method from main thread is ok
  95         Point point = cb.getLocationOnScreen();
  96         robot.mouseMove(point.x + 10, point.y + 10);
  97         robot.mousePress(InputEvent.BUTTON1_MASK);
  98         robot.mouseRelease(InputEvent.BUTTON1_MASK);
  99         toolkit.realSync();
 100 
 101         SwingUtilities.invokeAndWait(new Runnable() {
 102             public void run() {
 103                 if(getPopup().getList().getLastVisibleIndex() == 3) {
 104                     flag = true;
 105                 }
 106             }
 107         });
 108 
 109         if (!flag) {
 110             throw new RuntimeException("The ComboBox popup wasn't correctly updated");
 111         }
 112     }
 113 }