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:   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