001/* DropTargetDragEvent.java -- 002 Copyright (C) 2002, 2004 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. */ 037 038 039package java.awt.dnd; 040 041import java.awt.Point; 042import java.awt.datatransfer.DataFlavor; 043import java.awt.datatransfer.Transferable; 044import java.util.List; 045 046/** 047 * @since 1.2 048 */ 049public class DropTargetDragEvent extends DropTargetEvent 050{ 051 /** 052 * Compatible with 1.2+ 053 */ 054 private static final long serialVersionUID = -8422265619058953682L; 055 056 private final int dropAction; 057 private final int srcActions; 058 private final Point location; 059 060 /** 061 * Initializes a <code>DropTargetDragEvent</code>. 062 * 063 * @exception IllegalArgumentException If dropAction is not one of DnDConstants, 064 * srcActions is not a bitwise mask of DnDConstants, or dtc is null. 065 * @exception NullPointerException If location is null. 066 */ 067 public DropTargetDragEvent (DropTargetContext context, Point location, 068 int dropAction, int srcActions) 069 { 070 super (context); 071 072 if (location == null) 073 throw new NullPointerException (); 074 075 if (context == null) 076 throw new IllegalArgumentException (); 077 078 if (dropAction != DnDConstants.ACTION_NONE 079 && dropAction != DnDConstants.ACTION_COPY 080 && dropAction != DnDConstants.ACTION_MOVE 081 && dropAction != DnDConstants.ACTION_COPY_OR_MOVE 082 && dropAction != DnDConstants.ACTION_LINK 083 && dropAction != DnDConstants.ACTION_REFERENCE) 084 throw new IllegalArgumentException (); 085 086 int srcActionsMask = DnDConstants.ACTION_NONE 087 | DnDConstants.ACTION_COPY 088 | DnDConstants.ACTION_MOVE 089 | DnDConstants.ACTION_COPY_OR_MOVE 090 | DnDConstants.ACTION_LINK 091 | DnDConstants.ACTION_REFERENCE; 092 093 if (~(srcActions ^ srcActionsMask) != 0) 094 throw new IllegalArgumentException (); 095 096 this.dropAction = dropAction; 097 this.srcActions = srcActions; 098 this.location = location; 099 } 100 101 public void acceptDrag (int dragOperation) 102 { 103 context.acceptDrag (dragOperation); 104 } 105 106 public DataFlavor[] getCurrentDataFlavors () 107 { 108 return context.getCurrentDataFlavors (); 109 } 110 111 public List<DataFlavor> getCurrentDataFlavorsAsList () 112 { 113 return context.getCurrentDataFlavorsAsList (); 114 } 115 116 public int getDropAction() 117 { 118 return dropAction & ((DropTargetContext) source).getTargetActions(); 119 } 120 121 public Point getLocation () 122 { 123 return location; 124 } 125 126 public int getSourceActions () 127 { 128 return srcActions; 129 } 130 131 public boolean isDataFlavorSupported (DataFlavor df) 132 { 133 return context.isDataFlavorSupported (df); 134 } 135 136 public void rejectDrag () 137 { 138 context.rejectDrag (); 139 } 140 141 /** 142 * TODO 143 * 144 * @return 145 * 146 * @since 1.5 147 */ 148 public Transferable getTransferable() 149 { 150 return context.getTransferable(); 151 } 152} // class DropTargetDragEvent