1 /*

     2  * Copyright 2003-2005 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.Window;

    31 

    32 import java.awt.datatransfer.Transferable;

    33 

    34 import java.awt.dnd.DragSourceContext;

    35 import java.awt.dnd.DragSourceDragEvent;

    36 import java.awt.dnd.DragSourceDropEvent;

    37 import java.awt.dnd.DragSourceEvent;

    38 import java.awt.dnd.DragGestureEvent;

    39 import java.awt.dnd.InvalidDnDOperationException;

    40 

    41 import java.awt.event.InputEvent;

    42 

    43 import java.util.Map;

    44 

    45 import sun.awt.SunToolkit;

    46 

    47 import sun.awt.dnd.SunDragSourceContextPeer;

    48 import sun.awt.dnd.SunDropTargetContextPeer;

    49 

    50 /**

    51  * The X11DragSourceContextPeer class is the class responsible for handling

    52  * the interaction between the XDnD/Motif DnD subsystem and Java drag sources.

    53  *

    54  * @since 1.5

    55  */

    56 final class X11DragSourceContextPeer extends SunDragSourceContextPeer {

    57 

    58     private static final X11DragSourceContextPeer theInstance =

    59         new X11DragSourceContextPeer(null);

    60 

    61     /**

    62      * construct a new X11DragSourceContextPeer

    63      */

    64 

    65     private X11DragSourceContextPeer(DragGestureEvent dge) {

    66         super(dge);

    67     }

    68 

    69     static X11DragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) throws InvalidDnDOperationException {

    70         theInstance.setTrigger(dge);

    71         return theInstance;

    72     }

    73 

    74     protected void startDrag(Transferable transferable,

    75                              long[] formats, Map formatMap) {

    76         Component component = getTrigger().getComponent();

    77         Component c = null;

    78         MWindowPeer wpeer = null;

    79 

    80         for (c = component; c != null && !(c instanceof java.awt.Window);

    81              c = MComponentPeer.getParent_NoClientCode(c));

    82 

    83         if (c instanceof Window) {

    84             wpeer = (MWindowPeer)c.getPeer();

    85         }

    86 

    87         if (wpeer == null) {

    88             throw new InvalidDnDOperationException(

    89                 "Cannot find top-level for the drag source component");

    90         }

    91 

    92         startDrag(component,

    93                   wpeer,

    94                   transferable,

    95                   getTrigger().getTriggerEvent(),

    96                   getCursor(),

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

    98                   getDragSourceContext().getSourceActions(),

    99                   formats,

   100                   formatMap);

   101 

   102         /* This implementation doesn't use native context */

   103         setNativeContext(0);

   104 

   105         SunDropTargetContextPeer.setCurrentJVMLocalSourceTransferable(transferable);

   106     }

   107 

   108     /**

   109      * downcall into native code

   110      */

   111 

   112     private native long startDrag(Component component,

   113                                   MWindowPeer wpeer,

   114                                   Transferable transferable,

   115                                   InputEvent nativeTrigger,

   116                                   Cursor c, int ctype, int actions,

   117                                   long[] formats, Map formatMap);

   118 

   119     /**

   120      * set cursor

   121      */

   122 

   123     public void setCursor(Cursor c) throws InvalidDnDOperationException {

   124         SunToolkit.awtLock();

   125         super.setCursor(c);

   126         SunToolkit.awtUnlock();

   127     }

   128 

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

   130 

   131 }