1 /*

     2  * Copyright (c) 2011, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.lwawt;

    27 

    28 import java.awt.Component;

    29 import java.awt.KeyboardFocusManager;

    30 import java.awt.Window;

    31 

    32 import java.util.Map;

    33 import java.util.HashMap;

    34 

    35 import sun.awt.AWTAccessor;

    36 import sun.awt.AppContext;

    37 import sun.awt.KeyboardFocusManagerPeerImpl;

    38 

    39 public class LWKeyboardFocusManagerPeer extends KeyboardFocusManagerPeerImpl {

    40 

    41     private Object lock = new Object();

    42     private LWWindowPeer focusedWindow;

    43     private LWComponentPeer focusOwner;

    44 

    45     private static Map<KeyboardFocusManager, LWKeyboardFocusManagerPeer> instances =

    46         new HashMap<KeyboardFocusManager, LWKeyboardFocusManagerPeer>();

    47 

    48     public static synchronized LWKeyboardFocusManagerPeer getInstance(AppContext ctx) {

    49         return getInstance(AWTAccessor.getKeyboardFocusManagerAccessor().

    50                            getCurrentKeyboardFocusManager(ctx));

    51     }

    52 

    53     public static synchronized LWKeyboardFocusManagerPeer getInstance(KeyboardFocusManager manager) {

    54         LWKeyboardFocusManagerPeer instance = instances.get(manager);

    55         if (instance == null) {

    56             instance = new LWKeyboardFocusManagerPeer(manager);

    57             instances.put(manager, instance);

    58         }

    59         return instance;

    60     }

    61 

    62     public LWKeyboardFocusManagerPeer(KeyboardFocusManager manager) {

    63         super(manager);

    64     }

    65 

    66     @Override

    67     public Window getCurrentFocusedWindow() {

    68         synchronized (lock) {

    69             return (focusedWindow != null) ? (Window)focusedWindow.getTarget() : null;

    70         }

    71     }

    72 

    73     @Override

    74     public Component getCurrentFocusOwner() {

    75         synchronized (lock) {

    76             return (focusOwner != null) ? focusOwner.getTarget() : null;

    77         }

    78     }

    79 

    80     @Override

    81     public void setCurrentFocusOwner(Component comp) {

    82         synchronized (lock) {

    83             focusOwner = (comp != null) ? (LWComponentPeer)comp.getPeer() : null;

    84         }

    85     }

    86 

    87     void setFocusedWindow(LWWindowPeer peer) {

    88         synchronized (lock) {

    89             focusedWindow = peer;

    90         }

    91     }

    92 

    93     LWWindowPeer getFocusedWindow() {

    94         synchronized (lock) {

    95             return focusedWindow;

    96         }

    97     }

    98 

    99     void setFocusOwner(LWComponentPeer peer) {

   100         synchronized (lock) {

   101             focusOwner = peer;

   102         }

   103     }

   104 

   105     LWComponentPeer getFocusOwner() {

   106         synchronized (lock) {

   107             return focusOwner;

   108         }

   109     }

   110 }