Source for java.awt.dnd.DropTargetAdapter

   1: /* DragSourceAdapter.java -- drag-and-drop listener adapter
   2:    Copyright (C) 2002, 2005  Free Software Foundation, Inc.
   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: /**
  41:  * This class implements <code>DropTargetListener</code>, and implements all methods
  42:  * with empty bodies.  This allows a listener interested in implementing only
  43:  * a subset of these interfaces to extend this class and override only the
  44:  * desired methods.
  45:  *
  46:  * @author Michael Koch (konqueror@gmx.de)
  47:  * @since 1.4
  48:  * @status updated to 1.4
  49:  */
  50: public abstract class DropTargetAdapter
  51:   implements DropTargetListener
  52: {
  53:   /**
  54:    * Default constructor.
  55:    */
  56:   public DropTargetAdapter()
  57:   {
  58:   }
  59: 
  60:   /**
  61:    * Called when the cursor hotspot enters a drop site which will accept the
  62:    * drag.
  63:    *
  64:    * @param e the event
  65:    */
  66:   public void dragEnter (DropTargetDragEvent e)
  67:   {
  68:   }
  69: 
  70:   /**
  71:    * Called when the cursor hotspot moves inside of a drop site which will
  72:    * accept the drag.
  73:    *
  74:    * @param e the event
  75:    */
  76:   public void dragOver (DropTargetDragEvent e)
  77:   {
  78:   }
  79: 
  80:   /**
  81:    * Called when the user modifies the drop gesture. This is often the case
  82:    * when additional mouse or key events are received during the drag.
  83:    *
  84:    * @param e the event
  85:    */
  86:   public void dropActionChanged (DropTargetDragEvent e)
  87:   {
  88:   }
  89: 
  90:   /**
  91:    * Called when the cursor hotspot moves outside of a drop site which will
  92:    * accept the drag. This could also happen if the drop site is no longer
  93:    * active, or no longer accepts the drag.
  94:    *
  95:    * @param e the event
  96:    */
  97:   public void dragExit(DropTargetEvent e)
  98:   {
  99:   }
 100: } // class DropTargetAdapter