1 /*
   2  * Copyright (c) 2009, 2015, 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.awt.windows;
  27 
  28 import java.awt.Window;
  29 import java.awt.Component;
  30 import java.awt.peer.ComponentPeer;
  31 
  32 import sun.awt.AWTAccessor;
  33 import sun.awt.AWTAccessor.ComponentAccessor;
  34 import sun.awt.KeyboardFocusManagerPeerImpl;
  35 import sun.awt.CausedFocusEvent;
  36 
  37 final class WKeyboardFocusManagerPeer extends KeyboardFocusManagerPeerImpl {
  38     static native void setNativeFocusOwner(ComponentPeer peer);
  39     static native Component getNativeFocusOwner();
  40     static native Window getNativeFocusedWindow();
  41 
  42     private static final WKeyboardFocusManagerPeer inst = new WKeyboardFocusManagerPeer();
  43 
  44     public static WKeyboardFocusManagerPeer getInstance() {
  45         return inst;
  46     }
  47 
  48     private WKeyboardFocusManagerPeer() {
  49     }
  50 
  51     @Override
  52     public void setCurrentFocusOwner(Component comp) {
  53         final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
  54         setNativeFocusOwner(comp != null ? acc.getPeer(comp) : null);
  55     }
  56 
  57     @Override
  58     public Component getCurrentFocusOwner() {
  59         return getNativeFocusOwner();
  60     }
  61 
  62     @Override
  63     public void setCurrentFocusedWindow(Window win) {
  64         // Not used on Windows
  65         throw new RuntimeException("not implemented");
  66     }
  67 
  68     @Override
  69     public Window getCurrentFocusedWindow() {
  70         return getNativeFocusedWindow();
  71     }
  72 
  73     public static boolean deliverFocus(Component lightweightChild,
  74                                        Component target,
  75                                        boolean temporary,
  76                                        boolean focusedWindowChangeAllowed,
  77                                        long time,
  78                                        CausedFocusEvent.Cause cause)
  79     {
  80         // TODO: do something to eliminate this forwarding
  81         return KeyboardFocusManagerPeerImpl.deliverFocus(lightweightChild,
  82                                                          target,
  83                                                          temporary,
  84                                                          focusedWindowChangeAllowed,
  85                                                          time,
  86                                                          cause,
  87                                                          getNativeFocusOwner());
  88     }
  89 }