libjava/classpath/java/awt/dnd/DropTargetContext.java

   1 /* DropTargetContext.java --
   2    Copyright (C) 2002, 2003, 2004  Free Software Foundation
   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., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 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.awt.Component;
  41 import java.awt.datatransfer.DataFlavor;
  42 import java.awt.datatransfer.Transferable;
  43 import java.awt.datatransfer.UnsupportedFlavorException;
  44 import java.io.IOException;
  45 import java.io.Serializable;
  46 import java.util.Arrays;
  47 import java.util.List;
  48
  49 /**
  50  * @author Michael Koch (konqueror@gmx.de)
  51  * @since 1.2
  52  */
  53 public class DropTargetContext implements Serializable
  54 {
  55   static final long serialVersionUID = -634158968993743371L;
  56
  57   protected class TransferableProxy implements Transferable
  58   {
  59     protected boolean isLocal;
  60     protected Transferable transferable;
  61
  62     TransferableProxy (Transferable t, boolean local)
  63     {
  64       this.transferable = t;
  65       this.isLocal = local;
  66     }
  67
  68     public DataFlavor[] getTransferDataFlavors ()
  69     {
  70       return transferable.getTransferDataFlavors ();
  71     }
  72
  73     public boolean isDataFlavorSupported (DataFlavor flavor)
  74     {
  75       return transferable.isDataFlavorSupported (flavor);
  76     }
  77
  78     public Object getTransferData (DataFlavor flavor)
  79       throws UnsupportedFlavorException, IOException
  80     {
  81       return transferable.getTransferData (flavor);
  82     }
  83   }
  84
  85   private DropTarget dropTarget;
  86   private int targetActions;
  87   private java.awt.dnd.peer.DropTargetContextPeer dtcp;
  88
  89   // package private
  90   DropTargetContext (DropTarget dropTarget)
  91   {
  92     this.dropTarget = dropTarget;
  93   }
  94
  95   public DropTarget getDropTarget ()
  96   {
  97     return dropTarget;
  98   }
  99
 100   public Component getComponent ()
 101   {
 102     return dropTarget.getComponent ();
 103   }
 104
 105   public void addNotify (java.awt.dnd.peer.DropTargetContextPeer dtcp)
 106   {
 107     this.dtcp = dtcp;
 108   }
 109
 110   public void removeNotify ()
 111   {
 112     this.dtcp = null;
 113   }
 114
 115   protected void setTargetActions (int actions)
 116   {
 117     targetActions = actions;
 118   }
 119
 120   protected int getTargetActions()
 121   {
 122     return targetActions;
 123   }
 124
 125   /**
 126    * Signals that the drop is completed.
 127    *
 128    * @exception InvalidDnDOperationException If a drop is not outstanding.
 129    */
 130   public void dropComplete (boolean success)
 131   {
 132     // FIXME: implement this
 133   }
 134
 135   protected void acceptDrag (int dragOperation)
 136   {
 137     // FIXME: implement this
 138   }
 139
 140   protected void rejectDrag ()
 141   {
 142     // FIXME: implement this
 143   }
 144
 145   protected void acceptDrop (int dropOperation)
 146   {
 147     // FIXME: implement this
 148   }
 149
 150   protected void rejectDrop ()
 151   {
 152     // FIXME: implement this
 153   }
 154
 155   protected DataFlavor[] getCurrentDataFlavors ()
 156   {
 157     // FIXME: implement this
 158     return null;
 159   }
 160
 161   protected List getCurrentDataFlavorsAsList ()
 162   {
 163     return Arrays.asList (getCurrentDataFlavors ());
 164   }
 165
 166   protected boolean isDataFlavorSupported (DataFlavor flavor)
 167   {
 168     return getCurrentDataFlavorsAsList ().contains (flavor);
 169   }
 170
 171   /**
 172    * Return the <code>Transferable</code> operandof this operation.
 173    *
 174    * @exception InvalidDnDOperationException If a drag is not outstanding.
 175    */
 176   protected Transferable getTransferable() throws InvalidDnDOperationException
 177   {
 178     // FIXME: implement this
 179     return null;
 180   }
 181
 182   protected Transferable createTransferableProxy(Transferable t, boolean local)
 183   {
 184     return new TransferableProxy (t, local);
 185   }
 186 } // class DropTargetContext