1 /*
   2  * Copyright (c) 2007, 2018, 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 within JApplet
  31   @run main InfiniteRecursion_3

  32 */
  33 
  34 /**
  35  * InfiniteRecursion_3.java
  36  *
  37  * summary: put a JButton into Applet.
  38  * Add MouseWheelListener to Applet.
  39  * Rotating a wheel over the JButton would result in stack overflow.
  40  */
  41 
  42 import java.awt.*;
  43 import java.awt.event.*;
  44 import javax.swing.*;
  45 import test.java.awt.regtesthelpers.Util;
  46 import test.java.awt.regtesthelpers.AbstractTest;


  47 
  48 public class InfiniteRecursion_3 extends Frame {
  49     final static Robot robot = Util.createRobot();
  50     final static int MOVE_COUNT = 5;
  51     //*2 for both rotation directions,
  52     //*2 as Java sends the wheel event to every for nested component in hierarchy under cursor
  53     final static int EXPECTED_COUNT = MOVE_COUNT * 2 * 2;
  54     static int actualEvents = 0;
  55 
  56     public static void main(final String[] args) {
  57         InfiniteRecursion_3 app = new InfiniteRecursion_3();
  58         app.init();
  59         app.start();
  60     }
  61 
  62     public void init()
  63     {
  64         setLayout (new BorderLayout ());
  65     }//End  init()
  66 
  67     public void start ()
  68     {
  69         JButton jButton = new JButton();
  70 
  71         this.setSize(200, 200);
  72         this.addMouseWheelListener(new MouseWheelListener() {
  73                 public void mouseWheelMoved(MouseWheelEvent e)
  74                 {
  75                     System.out.println("Wheel moved on APPLET : "+e);
  76                     actualEvents++;
  77                 }
  78             });
  79 
  80         this.add(jButton);
  81         this.setLocationRelativeTo(null);
  82         this.setVisible(true);
  83         this.validate();
  84 
  85         Util.waitForIdle(robot);
  86 
  87         Util.pointOnComp(jButton, robot);
  88         Util.waitForIdle(robot);
  89 
  90         for (int i = 0; i < MOVE_COUNT; i++){
  91             robot.mouseWheel(1);
  92             robot.delay(10);
  93         }
  94 
  95         for (int i = 0; i < MOVE_COUNT; i++){
  96             robot.mouseWheel(-1);
  97             robot.delay(10);
  98         }
  99 
 100         Util.waitForIdle(robot);
 101         //Not fair to check for multiplier 4 as it's not specified actual number of WheelEvents
 102         //result in a single wheel rotation.
 103         if (actualEvents != EXPECTED_COUNT) {
 104             AbstractTest.fail("Expected events count: "+ EXPECTED_COUNT+" Actual events count: "+ actualEvents);
 105         }
 106     }// start()
 107 }
--- EOF ---