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_2
  32 */
  33 
  34 /**
  35  * InfiniteRecursion_2.java
  36  *
  37  * summary: put a JButton into JPanel and then put JPanel into Applet.
  38  * Add MouseWheelListener to Applet.
  39  * Add MouseListener to JPanel.
  40  * Rotating a wheel over the JButton would result in stack overflow.
  41 
  42  * summary: put a JButton into JApplet.
  43  * Add MouseWheelListener to JApplet.
  44  * Rotating a wheel over the JButton would result in stack overflow.
  45  */
  46 
  47 import java.awt.*;
  48 import java.awt.event.*;
  49 import javax.swing.*;
  50 import test.java.awt.regtesthelpers.Util;
  51 import test.java.awt.regtesthelpers.AbstractTest;
  52 
  53 public class InfiniteRecursion_2 extends Frame {
  54     final static Robot robot = Util.createRobot();
  55     final static int MOVE_COUNT = 5;
  56     //*2 for both rotation directions,
  57     //*2 as Java sends the wheel event to every for nested component in hierarchy under cursor
  58     final static int EXPECTED_COUNT = MOVE_COUNT * 2 * 2;
  59     static int actualEvents = 0;
  60 
  61     public static void main(final String[] args) {
  62         InfiniteRecursion_2 app = new InfiniteRecursion_2();
  63         app.init();
  64         app.start();
  65     }
  66 
  67     public void init()
  68     {
  69         setLayout (new BorderLayout ());
  70     }//End  init()
  71 
  72     public void start ()
  73     {
  74         JPanel outputBox = new JPanel();
  75         JButton jButton = new JButton();
  76 
  77         this.setSize(200, 200);
  78         this.setLocationRelativeTo(null);
  79         this.addMouseWheelListener(new MouseWheelListener() {
  80                 public void mouseWheelMoved(MouseWheelEvent e)
  81                 {
  82                     System.out.println("Wheel moved on APPLET : "+e);
  83                     actualEvents++;
  84                 }
  85             });
  86 
  87         outputBox.addMouseListener(new MouseAdapter() {
  88                 public void mousePressed(MouseEvent e)
  89                 {
  90                     System.out.println("MousePressed on OUTBOX : "+e);
  91                 }
  92 
  93             });
  94         this.add(outputBox);
  95         outputBox.add(jButton);
  96 
  97         this.setVisible(true);
  98         this.validate();
  99 
 100 
 101         Util.waitForIdle(robot);
 102 
 103         Util.pointOnComp(jButton, robot);
 104         Util.waitForIdle(robot);
 105 
 106         for (int i = 0; i < MOVE_COUNT; i++){
 107             robot.mouseWheel(1);
 108             robot.delay(10);
 109         }
 110 
 111         for (int i = 0; i < MOVE_COUNT; i++){
 112             robot.mouseWheel(-1);
 113             robot.delay(10);
 114         }
 115 
 116         Util.waitForIdle(robot);
 117         //Not fair to check for multiplier 4 as it's not specified actual number of WheelEvents
 118         //result in a single wheel rotation.
 119         if (actualEvents != EXPECTED_COUNT) {
 120             AbstractTest.fail("Expected events count: "+ EXPECTED_COUNT+" Actual events count: "+ actualEvents);
 121         }
 122     }// start()
 123 }