1 /*

     2  * Copyright 1997-2005 Sun Microsystems, Inc.  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.  Sun designates this

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

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.awt.motif;

    27 

    28 import java.awt.Component;

    29 import java.awt.Cursor;

    30 import java.awt.Image;

    31 import java.awt.Point;

    32 

    33 import java.awt.datatransfer.Transferable;

    34 

    35 import java.awt.dnd.DragSourceContext;

    36 import java.awt.dnd.DragGestureEvent;

    37 import java.awt.dnd.InvalidDnDOperationException;

    38 

    39 import java.awt.event.InputEvent;

    40 

    41 import java.awt.peer.ComponentPeer;

    42 import java.awt.peer.LightweightPeer;

    43 

    44 import java.util.Map;

    45 import sun.awt.SunToolkit;

    46 import sun.awt.dnd.SunDragSourceContextPeer;

    47 

    48 /**

    49  * <p>

    50  * TBC

    51  * </p>

    52  *

    53  * @since JDK1.2

    54  *

    55  */

    56 

    57 final class MDragSourceContextPeer extends SunDragSourceContextPeer {

    58 

    59     private static final MDragSourceContextPeer theInstance =

    60         new MDragSourceContextPeer(null);

    61 

    62     /**

    63      * construct a new MDragSourceContextPeer

    64      */

    65 

    66     private MDragSourceContextPeer(DragGestureEvent dge) {

    67         super(dge);

    68     }

    69 

    70     static MDragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) throws InvalidDnDOperationException {

    71         theInstance.setTrigger(dge);

    72         return theInstance;

    73     }

    74 

    75     protected void startDrag(Transferable transferable,

    76                              long[] formats, Map formatMap) {

    77         try {

    78             long nativeCtxtLocal = startDrag(getTrigger().getComponent(),

    79                                              transferable,

    80                                              getTrigger().getTriggerEvent(),

    81                                              getCursor(),

    82                                              getCursor() == null ? 0 : getCursor().getType(),

    83                                              getDragSourceContext().getSourceActions(),

    84                                              formats,

    85                                              formatMap);

    86             setNativeContext(nativeCtxtLocal);

    87         } catch (Exception e) {

    88             throw new InvalidDnDOperationException("failed to create native peer: " + e);

    89         }

    90 

    91         if (getNativeContext() == 0) {

    92             throw new InvalidDnDOperationException("failed to create native peer");

    93         }

    94 

    95         MDropTargetContextPeer.setCurrentJVMLocalSourceTransferable(transferable);

    96     }

    97 

    98     /**

    99      * downcall into native code

   100      */

   101 

   102     private native long startDrag(Component component,

   103                                   Transferable transferable,

   104                                   InputEvent nativeTrigger,

   105                                   Cursor c, int ctype, int actions,

   106                                   long[] formats, Map formatMap);

   107 

   108     /**

   109      * set cursor

   110      */

   111 

   112     public void setCursor(Cursor c) throws InvalidDnDOperationException {

   113         SunToolkit.awtLock();

   114         super.setCursor(c);

   115         SunToolkit.awtUnlock();

   116     }

   117 

   118     protected native void setNativeCursor(long nativeCtxt, Cursor c, int cType);

   119 

   120 }