001/* DropTargetDragEvent.java --
002   Copyright (C) 2002, 2004  Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.awt.dnd;
040
041import java.awt.Point;
042import java.awt.datatransfer.DataFlavor;
043import java.awt.datatransfer.Transferable;
044import java.util.List;
045
046/**
047 * @since 1.2
048 */
049public 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