moduletreeeditpolicy.java

一个eclipse插件源代码。用于web开发

/*
 * $Header: /home/cvs/WEBPUMP2.0/WebPumpIDE_Src/WebPumpIDE/src/com/webpump/ui/gefmodule/edit/ModuleTreeEditPolicy.java,v 1.1.1.1 2004/07/01 09:07:47 wang_j Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/07/01 09:07:47 $
 *
 * ====================================================================
 *
 * The NanJing HopeRun(IT-FOREST) Software License, Version 2.0.0
 *
 * Copyright 2003-2004 by NanJing HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and
 *                        IT Forest Corporation
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and IT Forest Corporation.
 * You shall not disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into with
 * HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and IT Forest Corporation.
 */

package com.webpump.ui.gefmodule.edit;

import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.UnexecutableCommand;
import org.eclipse.gef.editpolicies.AbstractEditPolicy;

/**
 * Class for ModuleTreeEditPolicy
 * 
 * @author shi_l
 * @version 2.0.0 2004-5-30
 */
public class ModuleTreeEditPolicy extends AbstractEditPolicy {

	/**
	 * get command
	 * @param req Request
	 * @return command Command
	 */
	public Command getCommand(Request req) {
		if (REQ_MOVE.equals(req.getType()))
			return getMoveCommand(req);
		return null;
	}

	/**
	 * get move command
	 * @param req Request
	 * @return command Command
	 */
	protected Command getMoveCommand(Request req) {
		EditPart parent = getHost().getParent();
		if (parent != null) {
			req.setType(REQ_MOVE_CHILDREN);
			Command cmd = parent.getCommand(req);
			req.setType(REQ_MOVE);
			return cmd;
		} else {
			return UnexecutableCommand.INSTANCE;
		}
	}

}