1 /*
   2  * Copyright (c) 2009, 2014, 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 import sun.awt.KeyboardFocusManagerPeerImpl;
  32 import sun.awt.CausedFocusEvent;
  33 
  34 final class WKeyboardFocusManagerPeer extends KeyboardFocusManagerPeerImpl {
  35     static native void setNativeFocusOwner(ComponentPeer peer);
  36     static native Component getNativeFocusOwner();
  37     static native Window getNativeFocusedWindow();
  38 
  39     private static final WKeyboardFocusManagerPeer inst = new WKeyboardFocusManagerPeer();
  40 
  41     public static WKeyboardFocusManagerPeer getInstance() {
  42         return inst;
  43     }
  44 
  45     private WKeyboardFocusManagerPeer() {
  46     }
  47 
  48     @Override
  49     public void setCurrentFocusOwner(Component comp) {
  50         setNativeFocusOwner(comp != null ? comp.getPeer() : null);
  51     }
  52 
  53     @Override
  54     public Component getCurrentFocusOwner() {
  55         return getNativeFocusOwner();
  56     }
  57 
  58     @Override
  59     public void setCurrentFocusedWindow(Window win) {
  60         // Not used on Windows
  61         throw new RuntimeException("not implemented");
  62     }
  63 
  64     @Override
  65     public Window getCurrentFocusedWindow() {
  66         return getNativeFocusedWindow();
  67     }
  68 
  69     public static boolean deliverFocus(Component lightweightChild,
  70                                        Component target,
  71                                        boolean temporary,
  72                                        boolean focusedWindowChangeAllowed,
  73                                        long time,
  74                                        CausedFocusEvent.Cause cause)
  75     {
  76         // TODO: do something to eliminate this forwarding
  77         return KeyboardFocusManagerPeerImpl.deliverFocus(lightweightChild,
  78                                                          target,
  79                                                          temporary,
  80                                                          focusedWindowChangeAllowed,
  81                                                          time,
  82                                                          cause,
  83                                                          getNativeFocusOwner());
  84     }
  85 }