1 /*
   2  * Copyright (c) 2007, 2016, 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      %W% %E%
  26   @key headful
  27   @bug       6598089
  28   @summary   Tests restoring focus on a single disabled coponent
  29   @author    Anton Tarasov: area=awt-focus
  30   @library   ../../regtesthelpers
  31   @build     Util
  32   @run       main RestoreFocusOnDisabledComponentTest
  33 */
  34 
  35 import java.awt.*;
  36 import java.awt.event.*;
  37 import java.applet.Applet;
  38 import test.java.awt.regtesthelpers.Util;
  39 
  40 /*
  41  * The bug is not reproducible on Windows.
  42  */
  43 public class RestoreFocusOnDisabledComponentTest extends Applet {
  44     Frame frame = new Frame("Frame") {public String toString() {return "FRAME";}};
  45     Button b0 = new Button("button0") {public String toString() {return "B-0";}};
  46     Button b1 = new Button("button1") {public String toString() {return "B-1";}};
  47     volatile int nFocused;
  48     Robot robot;
  49 
  50     public static void main(String[] args) {
  51         RestoreFocusOnDisabledComponentTest app = new RestoreFocusOnDisabledComponentTest();
  52         app.init();
  53         app.start();
  54     }
  55 
  56     public void init() {
  57         robot = Util.createRobot();
  58     }
  59 
  60     public void start() {
  61         frame.add(b0);
  62         frame.add(b1);
  63         frame.setLayout(new FlowLayout());
  64         frame.pack();
  65 
  66         frame.setVisible(true);
  67 
  68         Util.waitForIdle(robot);
  69         KeyboardFocusManager.setCurrentKeyboardFocusManager(new DefaultKeyboardFocusManager() {
  70             public boolean dispatchEvent(AWTEvent e) {
  71                 if (e.getID() == FocusEvent.FOCUS_GAINED) {
  72                     // Trying to emulate timings. b1 should be disabled just by the time it gets
  73                     // FOCUS_GAINED event. The latter is a result of disabling b0 that initiates
  74                     // focus auto transfer.
  75                     if (e.getSource() == b1) {
  76                         b1.setEnabled(false);
  77 
  78                     } else if (e.getSource() == b0) {
  79                         if (++nFocused > 10) {
  80                             nFocused = -1;
  81                             throw new TestFailedException("Focus went into busy loop!");
  82                         }
  83                     }
  84                 }
  85                 return super.dispatchEvent(e);
  86             }
  87         });
  88         // Initiating focus auto transfer.
  89         // Focus will be requested to b1. When FOCUS_GAINED is being dispatched to b1, it will
  90         // be disabled. This will trigger focus restoring. Focus will be requested to b0 (the
  91         // last opposite component). When FOCUS_GAINED is being dispatched to b0, it will
  92         // also be disabled. However, the last opposite component (and the most recent focus owner)
  93         // will still be b0. When DKFM initiates focus restoring it should detect restoring
  94         // on the same component and break.
  95         b0.setEnabled(false);
  96 
  97         Util.waitForIdle(robot);
  98         if (nFocused != -1) {
  99             System.out.println("Test passed.");
 100         }
 101     }
 102 }
 103 
 104 class TestFailedException extends RuntimeException {
 105     TestFailedException(String msg) {
 106         super("Test failed: " + msg);
 107     }
 108 }