childnodecreatecommand.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/commands/ChildNodeCreateCommand.java,v 1.2 2006/12/30 02:45:04 niegy Exp $
 * $Revision: 1.2 $
 * $Date: 2006/12/30 02:45:04 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved.
 * 
 * Created on 2006-11-28
 *******************************************************************************/


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

import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.requests.CreateRequest;

import com.primeton.studio.gef.core.Node;
import com.primeton.studio.gef.core.NodeElement;
import com.primeton.studio.gef.core.TNodeType;

/**
 * TODO 此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: ChildNodeCreateCommand.java,v $
 * Revision 1.2  2006/12/30 02:45:04  niegy
 * 重构代码
 *
 * Revision 1.1  2006/12/05 05:18:59  niegy
 * 修改模型，增加连线的扩展点
 * 
 */
public class ChildNodeCreateCommand extends NodeCreateCommand {

	private NodeElement selectChild = null;
	/**
	 * @param parent
	 * @param req
	 * @param rectangle
	 */
	public ChildNodeCreateCommand(Node parent,NodeElement child, CreateRequest req, Rectangle rectangle) {
		super(parent, req, rectangle);
		// TODO Auto-generated constructor stub
		selectChild = child;
		if(selectChild != null){
			if(selectChild.getNodeType()==TNodeType.ATTRICOLUMN_LITERAL)
				setLabel("Interface creation");
			else
				setLabel("Operand creation");
		}
		else{
			setLabel("Interface creation");
		}
	}
	
	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.commands.NodeCreateCommand#execute()
	 */
	public void execute() {
		// TODO Auto-generated method stub
		if(selectChild==null)
			super.execute();
		else{
			iniAddInfo();
			redo();
		}
	}
	
	public NodeElement getCreateNode(){
		return newNode;
	}
	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.commands.NodeCreateCommand#redo()
	 */
	public void redo() {
		// TODO Auto-generated method stub
		if(selectChild==null)
			super.redo();
		else{
			try{
				int index = parent.getNodes().indexOf(selectChild);
				int sum = parent.getNodes().size();
				if(index != -1){
					if(index+1==sum)
						nodeAdded = parent.getNodes().add(newNode);
					else
						parent.getNodes().add(index+1, newNode);
				}
				nodeAdded = true;
			}
			catch(Exception e){
				nodeAdded = false;
			}
		}
	}
	
	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.commands.NodeCreateCommand#undo()
	 */
	public void undo() {
		// TODO Auto-generated method stub
		super.undo();
	}

}