1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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   @bug 6480024
  27   @library ../../../regtesthelpers
  28   @build Util Sysout AbstractTest
  29   @summary stack overflow on mouse wheel rotation within Applet
  30   @author Andrei Dmitriev: area=awt.event
  31   @run applet InfiniteRecursion_2.html
  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 import test.java.awt.regtesthelpers.Sysout;
  53 
  54 import java.applet.Applet;
  55 
  56 public class InfiniteRecursion_2 extends Applet {
  57     final static Robot robot = Util.createRobot();
  58     final static int MOVE_COUNT = 5;
  59     //*2 for both rotation directions,
  60     //*2 as Java sends the wheel event to every for nested component in hierarchy under cursor
  61     final static int EXPECTED_COUNT = MOVE_COUNT * 2 * 2;
  62     static int actualEvents = 0;
  63 
  64     public void init()
  65     {
  66         setLayout (new BorderLayout ());
  67     }//End  init()
  68 
  69     public void start ()
  70     {
  71         JPanel outputBox = new JPanel();
  72         JButton jButton = new JButton();
  73 
  74         this.setSize(200, 200);
  75         this.addMouseWheelListener(new MouseWheelListener() {
  76                 public void mouseWheelMoved(MouseWheelEvent e)
  77                 {
  78                     System.out.println("Wheel moved on APPLET : "+e);
  79                     actualEvents++;
  80                 }
  81             });
  82 
  83         outputBox.addMouseListener(new MouseAdapter() {
  84                 public void mousePressed(MouseEvent e)
  85                 {
  86                     System.out.println("MousePressed on OUTBOX : "+e);
  87                 }
  88 
  89             });
  90         this.add(outputBox);
  91         outputBox.add(jButton);
  92 
  93         this.setVisible(true);
  94         this.validate();
  95 
  96 
  97         Util.waitForIdle(robot);
  98 
  99         Util.pointOnComp(jButton, robot);
 100         Util.waitForIdle(robot);
 101 
 102         for (int i = 0; i < MOVE_COUNT; i++){
 103             robot.mouseWheel(1);
 104             robot.delay(10);
 105         }
 106 
 107         for (int i = 0; i < MOVE_COUNT; i++){
 108             robot.mouseWheel(-1);
 109             robot.delay(10);
 110         }
 111 
 112         Util.waitForIdle(robot);
 113         //Not fair to check for multiplier 4 as it's not specified actual number of WheelEvents
 114         //result in a single wheel rotation.
 115         if (actualEvents != EXPECTED_COUNT) {
 116             AbstractTest.fail("Expected events count: "+ EXPECTED_COUNT+" Actual events count: "+ actualEvents);
 117         }
 118     }// start()
 119 }