1 /*
   2  * Copyright (c) 2007, 2011, 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 6480024
  28   @library ../../../regtesthelpers
  29   @build Util Sysout AbstractTest
  30   @summary stack overflow on mouse wheel rotation
  31   @author Andrei Dmitriev: area=awt.event
  32   @run main InfiniteRecursion
  33 */
  34 
  35 /**
  36  * InfiniteRecursion.java
  37  *
  38  * summary: put a JButton into JFrame.
  39  * Add MouseWheelListener to JFrame.
  40  * Add MouseListener to JButton.
  41  * Rotating a wheel over the JButton would result in stack overflow.
  42  */
  43 
  44 import java.awt.*;
  45 import java.awt.event.*;
  46 import javax.swing.*;
  47 import test.java.awt.regtesthelpers.Util;
  48 import test.java.awt.regtesthelpers.AbstractTest;
  49 import test.java.awt.regtesthelpers.Sysout;
  50 
  51 public class InfiniteRecursion {
  52     final static Robot robot = Util.createRobot();
  53     final static int MOVE_COUNT = 5;
  54 
  55     //*2 for both rotation directions,
  56     //*2 as Java sends the wheel event to every for nested component in hierarchy under cursor
  57     final static int EXPECTED_COUNT = MOVE_COUNT * 2 * 2;
  58 
  59     static int actualEvents = 0;
  60 
  61     public static void main(String []s)
  62     {
  63         JFrame frame = new JFrame("A test frame");
  64         frame.setSize(200, 200);
  65         frame.addMouseWheelListener(new MouseWheelListener() {
  66                 public void mouseWheelMoved(MouseWheelEvent e) {
  67                     System.out.println("Wheel moved on FRAME : "+e);
  68                     actualEvents++;
  69                 }
  70             });
  71 
  72         JButton jButton = new JButton();
  73         /*
  74           outputBox.addMouseWheelListener(new MouseWheelListener() {
  75           public void mouseWheelMoved(MouseWheelEvent e){}
  76           });
  77         */
  78         jButton.addMouseListener(new MouseAdapter() {
  79                 public void mousePressed(MouseEvent e) {
  80                     System.out.println("MousePressed on jButton : "+e);
  81                 }
  82 
  83             });
  84         frame.add(jButton);
  85 
  86         frame.setVisible(true);
  87 
  88         Util.waitForIdle(robot);
  89 
  90         Util.pointOnComp(jButton, robot);
  91         Util.waitForIdle(robot);
  92 
  93         for (int i = 0; i < MOVE_COUNT; i++){
  94             robot.mouseWheel(1);
  95             robot.delay(10);
  96         }
  97 
  98         for (int i = 0; i < MOVE_COUNT; i++){
  99             robot.mouseWheel(-1);
 100             robot.delay(10);
 101         }
 102 
 103 
 104         Util.waitForIdle(robot);
 105         //Not fair to check for multiplier 4 as it's not specified actual number of WheelEvents
 106         //result in a single wheel rotation.
 107         if (actualEvents != EXPECTED_COUNT) {
 108             AbstractTest.fail("Expected events count: "+ EXPECTED_COUNT+" Actual events count: "+ actualEvents);
 109         }
 110     }
 111 }