Source for java.awt.dnd.DropTargetContext

   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:   /** @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