libjava/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., 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.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   /** @specnote According to the online documentation, this is
  58    * protected, but in reality it is public.  */
  59   public class TransferableProxy implements Transferable
  60   {
  61     protected boolean isLocal;
  62     protected Transferable transferable;
  63
  64     TransferableProxy (Transferable t, boolean local)
  65     {
  66       this.transferable = t;
  67       this.isLocal = local;
  68     }
  69
  70     public DataFlavor[] getTransferDataFlavors ()
  71     {
  72       return transferable.getTransferDataFlavors ();
  73     }
  74
  75     public boolean isDataFlavorSupported (DataFlavor flavor)
  76     {
  77       return transferable.isDataFlavorSupported (flavor);
  78     }
  79
  80     public Object getTransferData (DataFlavor flavor)
  81       throws UnsupportedFlavorException, IOException
  82     {
  83       return transferable.getTransferData (flavor);
  84     }
  85   }
  86
  87   private DropTarget dropTarget;
  88   private int targetActions;
  89   private java.awt.dnd.peer.DropTargetContextPeer dtcp;
  90
  91   // package private
  92   DropTargetContext (DropTarget dropTarget)
  93   {
  94     this.dropTarget = dropTarget;
  95   }
  96
  97   public DropTarget getDropTarget ()
  98   {
  99     return dropTarget;
 100   }
 101
 102   public Component getComponent ()
 103   {
 104     return dropTarget.getComponent ();
 105   }
 106
 107   public void addNotify (java.awt.dnd.peer.DropTargetContextPeer dtcp)
 108   {
 109     this.dtcp = dtcp;
 110   }
 111
 112   public void removeNotify ()
 113   {
 114     this.dtcp = null;
 115   }
 116
 117   protected void setTargetActions (int actions)
 118   {
 119     targetActions = actions;
 120   }
 121
 122   protected int getTargetActions()
 123   {
 124     return targetActions;
 125   }
 126
 127   /**
 128    * Signals that the drop is completed.
 129    *
 130    * @exception InvalidDnDOperationException If a drop is not outstanding.
 131    */
 132   public void dropComplete (boolean success)
 133   {
 134     // FIXME: implement this
 135   }
 136
 137   protected void acceptDrag (int dragOperation)
 138   {
 139     // FIXME: implement this
 140   }
 141
 142   protected void rejectDrag ()
 143   {
 144     // FIXME: implement this
 145   }
 146
 147   protected void acceptDrop (int dropOperation)
 148   {
 149     // FIXME: implement this
 150   }
 151
 152   protected void rejectDrop ()
 153   {
 154     // FIXME: implement this
 155   }
 156
 157   protected DataFlavor[] getCurrentDataFlavors ()
 158   {
 159     // FIXME: implement this
 160     return null;
 161   }
 162
 163   protected List getCurrentDataFlavorsAsList ()
 164   {
 165     return Arrays.asList (getCurrentDataFlavors ());
 166   }
 167
 168   protected boolean isDataFlavorSupported (DataFlavor flavor)
 169   {
 170     return getCurrentDataFlavorsAsList ().contains (flavor);
 171   }
 172
 173   /**
 174    * Return the <code>Transferable</code> operandof this operation.
 175    *
 176    * @exception InvalidDnDOperationException If a drag is not outstanding.
 177    */
 178   protected Transferable getTransferable() throws InvalidDnDOperationException
 179   {
 180     // FIXME: implement this
 181     return null;
 182   }
 183
 184   protected Transferable createTransferableProxy(Transferable t, boolean local)
 185   {
 186     return new TransferableProxy (t, local);
 187   }
 188 } // class DropTargetContext