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