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_1
  33 */
  34 
  35 /**
  36  * InfiniteRecursion_1.java
  37  *
  38  * summary: put a JButton into JPanel and then put JPanel into JFrame.
  39  * Add MouseWheelListener to JFrame.
  40  * Add MouseListener to JPanel.
  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_1 {
  52     final static Robot robot = Util.createRobot();
  53     final static int MOVE_COUNT = 5;
  54     //*2 for both rotation directions,
  55     //*2 as Java sends the wheel event to every for nested component in hierarchy under cursor
  56     final static int EXPECTED_COUNT = MOVE_COUNT * 2 * 2;
  57     static int actualEvents = 0;
  58 
  59     public static void main(String []s)
  60     {
  61         JFrame frame = new JFrame("A test frame");
  62         JPanel outputBox = new JPanel();
  63         JButton jButton = new JButton();
  64 
  65         frame.setSize(200, 200);
  66         frame.addMouseWheelListener(new MouseWheelListener() {
  67                 public void mouseWheelMoved(MouseWheelEvent e)
  68                 {
  69                     System.out.println("Wheel moved on FRAME : "+e);
  70                     actualEvents++;
  71                 }
  72             });
  73 
  74         outputBox.addMouseListener(new MouseAdapter() {
  75                 public void mousePressed(MouseEvent e)
  76                 {
  77                     System.out.println("MousePressed on OUTBOX : "+e);
  78                 }
  79 
  80             });
  81         frame.add(outputBox);
  82         outputBox.add(jButton);
  83 
  84         frame.setVisible(true);
  85 
  86         Util.waitForIdle(robot);
  87 
  88         Util.pointOnComp(jButton, robot);
  89         Util.waitForIdle(robot);
  90 
  91         for (int i = 0; i < MOVE_COUNT; i++){
  92             robot.mouseWheel(1);
  93             robot.delay(10);
  94         }
  95 
  96         for (int i = 0; i < MOVE_COUNT; i++){
  97             robot.mouseWheel(-1);
  98             robot.delay(10);
  99         }
 100 
 101         Util.waitForIdle(robot);
 102         //Not fair to check for multiplier 4 as it's not specified actual number of WheelEvents
 103         //result in a single wheel rotation.
 104         if (actualEvents != EXPECTED_COUNT) {
 105             AbstractTest.fail("Expected events count: "+ EXPECTED_COUNT+" Actual events count: "+ actualEvents);
 106         }
 107     }
 108 }