toolchain/gcc/libjava/java/awt/dnd/DropTargetDragEvent.java

   1 /* DropTargetDragEvent.java --
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package java.awt.dnd;
  39
  40 import java.util.List;
  41 import java.awt.Point;
  42 import java.awt.datatransfer.DataFlavor;
  43
  44 /**
  45  * @since 1.2
  46  */
  47 public class DropTargetDragEvent extends DropTargetEvent
  48 {
  49   /**
  50    * Compatible with 1.2+
  51    */
  52   private static final long serialVersionUID = -8422265619058953682L;
  53
  54   private final int dropAction;
  55   private final int srcActions;
  56   private final Point location;
  57
  58   /**
  59    * Initializes a <code>DropTargetDragEvent</code>.
  60    *
  61    * @exception IllegalArgumentException If dropAction is not one of DnDConstants,
  62    * srcActions is not a bitwise mask of DnDConstants, or dtc is null.
  63    * @exception NullPointerException If location is null.
  64    */
  65   public DropTargetDragEvent (DropTargetContext context, Point location,
  66                               int dropAction, int srcActions)
  67   {
  68     super (context);
  69
  70     if (location == null)
  71       throw new NullPointerException ();
  72
  73     if (context == null)
  74       throw new IllegalArgumentException ();
  75
  76     if (dropAction != DnDConstants.ACTION_NONE
  77         && dropAction != DnDConstants.ACTION_COPY
  78         && dropAction != DnDConstants.ACTION_MOVE
  79         && dropAction != DnDConstants.ACTION_COPY_OR_MOVE
  80         && dropAction != DnDConstants.ACTION_LINK
  81         && dropAction != DnDConstants.ACTION_REFERENCE)
  82       throw new IllegalArgumentException ();
  83
  84     int srcActionsMask = DnDConstants.ACTION_NONE
  85                          | DnDConstants.ACTION_COPY
  86                          | DnDConstants.ACTION_MOVE
  87                          | DnDConstants.ACTION_COPY_OR_MOVE
  88                          | DnDConstants.ACTION_LINK
  89                          | DnDConstants.ACTION_REFERENCE;
  90
  91     if (~(srcActions ^ srcActionsMask) != 0)
  92       throw new IllegalArgumentException ();
  93
  94     this.dropAction = dropAction;
  95     this.srcActions = srcActions;
  96     this.location = location;
  97   }
  98
  99   public void acceptDrag (int dragOperation)
 100   {
 101     context.acceptDrag (dragOperation);
 102   }
 103
 104   public DataFlavor[] getCurrentDataFlavors ()
 105   {
 106     return context.getCurrentDataFlavors ();
 107   }
 108
 109   public List getCurrentDataFlavorsAsList ()
 110   {
 111     return context.getCurrentDataFlavorsAsList ();
 112   }
 113
 114   public int getDropAction()
 115   {
 116     return 0;
 117     //return dropAction & ((DropTargetContext) source).getTargetActions();
 118   }
 119
 120   public Point getLocation ()
 121   {
 122     return location;
 123   }
 124
 125   public int getSourceActions ()
 126   {
 127     return srcActions;
 128   }
 129
 130   public boolean isDataFlavorSupported (DataFlavor df)
 131   {
 132     return context.isDataFlavorSupported (df);
 133   }
 134
 135   public void rejectDrag ()
 136   {
 137     context.rejectDrag ();
 138   }
 139 } // class DropTargetDragEvent