dndlistener.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.dnd;

import org.eclipse.swt.internal.*;
import org.eclipse.swt.widgets.*;


class DNDListener extends TypedListener {
/**
 * DNDListener constructor comment.
 * @param listener org.eclipse.swt.internal.SWTEventListener
 */
DNDListener(SWTEventListener listener) {
	super(listener);
}
public void handleEvent (Event e) {
	switch (e.type) {
		case DND.DragStart: {
			DragSourceEvent event = new DragSourceEvent((DNDEvent)e);
			((DragSourceListener) eventListener).dragStart (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.DragEnd: {
			DragSourceEvent event = new DragSourceEvent((DNDEvent)e);
			((DragSourceListener) eventListener).dragFinished (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.DragSetData: {
			DragSourceEvent event = new DragSourceEvent((DNDEvent)e);
			((DragSourceListener) eventListener).dragSetData (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.DragEnter: {
			DropTargetEvent event = new DropTargetEvent((DNDEvent)e);
			((DropTargetListener) eventListener).dragEnter (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.DragLeave: {
			DropTargetEvent event = new DropTargetEvent((DNDEvent)e);
			((DropTargetListener) eventListener).dragLeave (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.DragOver: {
			DropTargetEvent event = new DropTargetEvent((DNDEvent)e);
			((DropTargetListener) eventListener).dragOver (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.Drop: {
			DropTargetEvent event = new DropTargetEvent((DNDEvent)e);
			((DropTargetListener) eventListener).drop (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.DropAccept: {
			DropTargetEvent event = new DropTargetEvent((DNDEvent)e);
			((DropTargetListener) eventListener).dropAccept (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		case DND.DragOperationChanged: {
			DropTargetEvent event = new DropTargetEvent((DNDEvent)e);
			((DropTargetListener) eventListener).dragOperationChanged (event);
			event.updateEvent((DNDEvent)e);
			break;
		}
		
	}
}
}