jfoperationmodifyproperty.java

用Java开发的、实现类似Visio功能的应用程序源码

/**
 *    $Id:JFOperationModifyProperty.java $
 *
 *    Copyright 2004 ~ 2005  JingFei International Cooperation LTD. All rights reserved. *
 */
package com.jfimagine.jfgraph.shape.action;


import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Comparator;
import java.util.Collections;

import com.jfimagine.jfgraph.geom.JFPoint;
import com.jfimagine.jfgraph.shape.base.AbstractObject;
import com.jfimagine.jfgraph.shape.base.AbstractShape;
import com.jfimagine.jfgraph.shape.base.ObjectList;

import com.jfimagine.jfgraph.shape.union.JFPage;
import com.jfimagine.jfgraph.shape.union.JFLayer;


/**
 *  Class JFOperationModifyProperty is used to record a modify properties operation.
 */
public class JFOperationModifyProperty extends JFOperation{


	/** object id of the object to be changed text.
	 */
	private int m_objectId	=0;
	
	/** old properties of this object */
	private  ObjectList m_oldProperties =null;
	/** new properties of this object */
	private  ObjectList m_newProperties =null;

	/**  
	 *    Constructor.
	 *    @param page A page that used to do opeation.
	 *    @param obj An object that to be changed text.
	 *    @param oldProperties Last properties assigned.
	 *    @param newProperties New properties assigned.
	 */        
        public JFOperationModifyProperty(JFPage page,AbstractObject obj,ObjectList oldProperties,ObjectList newProperties){
        	m_page	=page;
		setActionId(JFOperation.OPER_MODIFY_PROPERTIES);
		if (obj==null)  return;
		
		AbstractShape aShape	=(AbstractShape)obj;
		m_objectId	=aShape.getObjectId();
		try{
			m_oldProperties	=(ObjectList)oldProperties.clone();
			m_newProperties	=(ObjectList)newProperties.clone();
		}catch(Exception e){
		}
	}


	/** undo this operation 
	 *  @return new objects selected
	 */
	public List undo(){
		List ret	=new ArrayList();
		AbstractObject obj=getObject(m_objectId,false);
		if (obj!=null){
			try{ 
				AbstractShape aShape	=(AbstractShape)obj;
				ObjectList oldProperties=(ObjectList)m_oldProperties.clone();


				aShape.getPropertyList().setList(new ArrayList(oldProperties.getList()));
				ret.add(obj);
				
			}catch(Exception e){
			}
		}
		
		return ret;
	}


	/** redo this operation
	 *  @return new objects selected
	 */
	public List redo(){
		List ret	=new ArrayList();
		AbstractObject obj=getObject(m_objectId,false);
		if (obj!=null){
			try{
				AbstractShape aShape	=(AbstractShape)obj;
				ObjectList newProperties=(ObjectList)m_newProperties.clone();

				aShape.getPropertyList().setList(new ArrayList(newProperties.getList()));
				ret.add(obj);
			}catch(Exception e){
			}
		}
		
		return ret;
	}


	
}