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1: /* DragSourceListener.java -- listen to events during the drag 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: 39: package java.awt.dnd; 40: 41: import java.util.EventListener; 42: 43: /** 44: * This class allows an object to listen for drag and drop events. It can 45: * be used to provide appropriate feedback for "drag over" actions. You can 46: * also use a <code>DragSourceAdapter</code> to filter the events you are 47: * interested in. 48: * 49: * @author Eric Blake (ebb9@email.byu.edu) 50: * @since 1.2 51: * @status updated to 1.4 52: */ 53: public interface DragSourceListener extends EventListener 54: { 55: /** 56: * Called when the cursor hotspot enters a drop site which will accept the 57: * drag. 58: * 59: * @param e the drag source drag event 60: */ 61: void dragEnter(DragSourceDragEvent e); 62: 63: /** 64: * Called when the cursor hotspot moves inside of a drop site which will 65: * accept the drag. 66: * 67: * @param e the drag source drag event 68: */ 69: void dragOver(DragSourceDragEvent e); 70: 71: /** 72: * Called when the user modifies the drop gesture. This is often the case 73: * when additional mouse or key events are received during the drag. 74: * 75: * @param e the drag source drag event 76: */ 77: void dropActionChanged(DragSourceDragEvent e); 78: 79: /** 80: * Called when the cursor hotspot moves outside of a drop site which will 81: * accept the drag. This could also happen if the drop site is no longer 82: * active, or no longer accepts the drag. 83: * 84: * @param e the drag source drag event 85: */ 86: void dragExit(DragSourceEvent e); 87: 88: /** 89: * Called when the drag and drop operation is complete. After this event, 90: * <code>getDropSuccess</code> of the event is valid, and 91: * <code>getDropAction</code> holds the action requested by the drop site. 92: * Furthermore, the <code>DragSourceContext</code> is invalidated. 93: * 94: * @param e the drag source drag event 95: */ 96: void dragDropEnd(DragSourceDropEvent e); 97: } // interface DragSourceListener