libjava/java/awt/dnd/DropTargetContext.java

   1 /* DropTargetContext.java --
   2    Copyright (C) 2002, 2003 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.dnd.peer.DropTargetContextPeer;
  41 import java.io.Serializable;
  42 import java.io.IOException;
  43 import java.awt.Component;
  44 import java.awt.datatransfer.DataFlavor;
  45 import java.awt.datatransfer.Transferable;
  46 import java.awt.datatransfer.UnsupportedFlavorException;
  47 import java.util.Arrays;
  48 import java.util.List;
  49
  50 /**
  51  * @author Michael Koch <konqueror@gmx.de>
  52  * @since 1.2
  53  */
  54 public class DropTargetContext implements Serializable
  55 {
  56   static final long serialVersionUID = -634158968993743371L;
  57
  58   /** @specnote According to the online documentation, this is
  59    * protected, but in reality it is public.  */
  60   public class TransferableProxy implements Transferable
  61   {
  62     protected boolean isLocal;
  63     protected Transferable transferable;
  64
  65     TransferableProxy (Transferable t, boolean local)
  66     {
  67       this.transferable = t;
  68       this.isLocal = local;
  69     }
  70
  71     public DataFlavor[] getTransferDataFlavors ()
  72     {
  73       return transferable.getTransferDataFlavors ();
  74     }
  75
  76     public boolean isDataFlavorSupported (DataFlavor flavor)
  77     {
  78       return transferable.isDataFlavorSupported (flavor);
  79     }
  80
  81     public Object getTransferData (DataFlavor flavor)
  82       throws UnsupportedFlavorException, IOException
  83     {
  84       return transferable.getTransferData (flavor);
  85     }
  86   }
  87
  88   private DropTarget dropTarget;
  89   private int targetActions;
  90   private java.awt.dnd.peer.DropTargetContextPeer dtcp;
  91
  92   // package private
  93   DropTargetContext (DropTarget dropTarget)
  94   {
  95     this.dropTarget = dropTarget;
  96   }
  97
  98   public DropTarget getDropTarget ()
  99   {
 100     return dropTarget;
 101   }
 102
 103   public Component getComponent ()
 104   {
 105     return dropTarget.getComponent ();
 106   }
 107
 108   public void addNotify (java.awt.dnd.peer.DropTargetContextPeer dtcp)
 109   {
 110     this.dtcp = dtcp;
 111   }
 112
 113   public void removeNotify ()
 114   {
 115     this.dtcp = null;
 116   }
 117
 118   protected void setTargetActions (int actions)
 119   {
 120     targetActions = actions;
 121   }
 122
 123   protected int getTargetActions()
 124   {
 125     return targetActions;
 126   }
 127
 128   /**
 129    * Signals that the drop is completed.
 130    *
 131    * @exception InvalidDnDOperationException If a drop is not outstanding.
 132    */
 133   public void dropComplete (boolean success)
 134   {
 135     // FIXME: implement this
 136   }
 137
 138   protected void acceptDrag (int dragOperation)
 139   {
 140     // FIXME: implement this
 141   }
 142
 143   protected void rejectDrag ()
 144   {
 145     // FIXME: implement this
 146   }
 147
 148   protected void acceptDrop (int dropOperation)
 149   {
 150     // FIXME: implement this
 151   }
 152
 153   protected void rejectDrop ()
 154   {
 155     // FIXME: implement this
 156   }
 157
 158   protected DataFlavor[] getCurrentDataFlavors ()
 159   {
 160     // FIXME: implement this
 161     return null;
 162   }
 163
 164   protected List getCurrentDataFlavorsAsList ()
 165   {
 166     return Arrays.asList (getCurrentDataFlavors ());
 167   }
 168
 169   protected boolean isDataFlavorSupported (DataFlavor flavor)
 170   {
 171     return getCurrentDataFlavorsAsList ().contains (flavor);
 172   }
 173
 174   /**
 175    * Return the <code>Transferable</code> operandof this operation.
 176    *
 177    * @exception InvalidDnDOperationException If a drag is not outstanding.
 178    */
 179   protected Transferable getTransferable() throws InvalidDnDOperationException
 180   {
 181     // FIXME: implement this
 182     return null;
 183   }
 184
 185   protected Transferable createTransferableProxy(Transferable t, boolean local)
 186   {
 187     return new TransferableProxy (t, local);
 188   }
 189 } // class DropTargetContext