001 /* DropTargetDragEvent.java --
002 Copyright (C) 2002, 2004 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package java.awt.dnd;
040
041 import java.awt.Point;
042 import java.awt.datatransfer.DataFlavor;
043 import java.awt.datatransfer.Transferable;
044 import java.util.List;
045
046 /**
047 * @since 1.2
048 */
049 public class DropTargetDragEvent extends DropTargetEvent
050 {
051 /**
052 * Compatible with 1.2+
053 */
054 private static final long serialVersionUID = -8422265619058953682L;
055
056 private final int dropAction;
057 private final int srcActions;
058 private final Point location;
059
060 /**
061 * Initializes a <code>DropTargetDragEvent</code>.
062 *
063 * @exception IllegalArgumentException If dropAction is not one of DnDConstants,
064 * srcActions is not a bitwise mask of DnDConstants, or dtc is null.
065 * @exception NullPointerException If location is null.
066 */
067 public DropTargetDragEvent (DropTargetContext context, Point location,
068 int dropAction, int srcActions)
069 {
070 super (context);
071
072 if (location == null)
073 throw new NullPointerException ();
074
075 if (context == null)
076 throw new IllegalArgumentException ();
077
078 if (dropAction != DnDConstants.ACTION_NONE
079 && dropAction != DnDConstants.ACTION_COPY
080 && dropAction != DnDConstants.ACTION_MOVE
081 && dropAction != DnDConstants.ACTION_COPY_OR_MOVE
082 && dropAction != DnDConstants.ACTION_LINK
083 && dropAction != DnDConstants.ACTION_REFERENCE)
084 throw new IllegalArgumentException ();
085
086 int srcActionsMask = DnDConstants.ACTION_NONE
087 | DnDConstants.ACTION_COPY
088 | DnDConstants.ACTION_MOVE
089 | DnDConstants.ACTION_COPY_OR_MOVE
090 | DnDConstants.ACTION_LINK
091 | DnDConstants.ACTION_REFERENCE;
092
093 if (~(srcActions ^ srcActionsMask) != 0)
094 throw new IllegalArgumentException ();
095
096 this.dropAction = dropAction;
097 this.srcActions = srcActions;
098 this.location = location;
099 }
100
101 public void acceptDrag (int dragOperation)
102 {
103 context.acceptDrag (dragOperation);
104 }
105
106 public DataFlavor[] getCurrentDataFlavors ()
107 {
108 return context.getCurrentDataFlavors ();
109 }
110
111 public List<DataFlavor> getCurrentDataFlavorsAsList ()
112 {
113 return context.getCurrentDataFlavorsAsList ();
114 }
115
116 public int getDropAction()
117 {
118 return dropAction & ((DropTargetContext) source).getTargetActions();
119 }
120
121 public Point getLocation ()
122 {
123 return location;
124 }
125
126 public int getSourceActions ()
127 {
128 return srcActions;
129 }
130
131 public boolean isDataFlavorSupported (DataFlavor df)
132 {
133 return context.isDataFlavorSupported (df);
134 }
135
136 public void rejectDrag ()
137 {
138 context.rejectDrag ();
139 }
140
141 /**
142 * TODO
143 *
144 * @return
145 *
146 * @since 1.5
147 */
148 public Transferable getTransferable()
149 {
150 return context.getTransferable();
151 }
152 } // class DropTargetDragEvent