001/* DragSourceAdapter.java -- drag-and-drop listener adapter 002 Copyright (C) 2002, 2005 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package java.awt.dnd; 039 040/** 041 * This class implements <code>DropTargetListener</code>, and implements all methods 042 * with empty bodies. This allows a listener interested in implementing only 043 * a subset of these interfaces to extend this class and override only the 044 * desired methods. 045 * 046 * @author Michael Koch (konqueror@gmx.de) 047 * @since 1.4 048 * @status updated to 1.4 049 */ 050public abstract class DropTargetAdapter 051 implements DropTargetListener 052{ 053 /** 054 * Default constructor. 055 */ 056 public DropTargetAdapter() 057 { 058 } 059 060 /** 061 * Called when the cursor hotspot enters a drop site which will accept the 062 * drag. 063 * 064 * @param e the event 065 */ 066 public void dragEnter (DropTargetDragEvent e) 067 { 068 } 069 070 /** 071 * Called when the cursor hotspot moves inside of a drop site which will 072 * accept the drag. 073 * 074 * @param e the event 075 */ 076 public void dragOver (DropTargetDragEvent e) 077 { 078 } 079 080 /** 081 * Called when the user modifies the drop gesture. This is often the case 082 * when additional mouse or key events are received during the drag. 083 * 084 * @param e the event 085 */ 086 public void dropActionChanged (DropTargetDragEvent e) 087 { 088 } 089 090 /** 091 * Called when the cursor hotspot moves outside of a drop site which will 092 * accept the drag. This could also happen if the drop site is no longer 093 * active, or no longer accepts the drag. 094 * 095 * @param e the event 096 */ 097 public void dragExit(DropTargetEvent e) 098 { 099 } 100} // class DropTargetAdapter