nodecomponenteditpolicy.java

对eclipse gef进行封装,可以生成图形化编辑器

/*******************************************************************************
 * $Header: /cvsroot/EOS6/work_dir/niegy/com.primeton.studio.gef.ui/src/com/primeton/studio/gef/ui/ui/policy/NodeComponentEditPolicy.java,v 1.3 2006/12/30 02:45:03 niegy Exp $
 * $Revision: 1.3 $
 * $Date: 2006/12/30 02:45:03 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved. 
 * 
 * Created on 2006-9-28
 *******************************************************************************/


package com.primeton.studio.gef.ui.ui.policy;

import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.ComponentEditPolicy;
import org.eclipse.gef.requests.GroupRequest;

import com.primeton.studio.gef.core.Node;
import com.primeton.studio.gef.core.Diagram;
import com.primeton.studio.gef.core.NodeElement;
import com.primeton.studio.gef.ui.commands.NodeDeleteCommand;


/**
 * TODO此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: NodeComponentEditPolicy.java,v $
 * Revision 1.3  2006/12/30 02:45:03  niegy
 * 重构代码
 *
 * Revision 1.2  2006/11/18 12:13:53  niegy
 * 增加容器模型
 *
 * Revision 1.1  2006/11/17 03:15:13  niegy
 * create
 * 
 */
public class NodeComponentEditPolicy extends ComponentEditPolicy {
	
	/* (non-Javadoc)
	 * @see org.eclipse.gef.editpolicies.ComponentEditPolicy#createDeleteCommand(org.eclipse.gef.requests.GroupRequest)
	 */
	protected Command createDeleteCommand(GroupRequest deleteRequest) {
		Object parent = getHost().getParent().getModel();
		Object child = getHost().getModel();
		if (parent instanceof Node && child instanceof NodeElement) {
			return new NodeDeleteCommand((Node)parent, (NodeElement) child);
		}
		return super.createDeleteCommand(deleteRequest);
	}
}