jfoperationmirror.java

用Java开发的、实现类似Visio功能的应用程序源码

/**
 *    $Id:JFOperationMirror.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 com.jfimagine.jfgraph.geom.JFPoint;
import com.jfimagine.jfgraph.shape.base.AbstractObject;
import com.jfimagine.jfgraph.shape.base.AbstractShape;
import com.jfimagine.jfgraph.shape.union.JFPage;

/**
 *  Class JFOperationMirror is used to record a mirror operation.
 */
public class JFOperationMirror extends JFOperationModifyPorts{

	/**a base x coordinate for mirror*/
	private double m_baseX=0;
	
	/**  
	 *    Constructor.
	 *    @param page A page that used to do opeation.
	 *    @param obj The object has been mirrord(this object must be AbstractObject or a list of AbstractObject).
	 *    @param baseX a base x coordinate for mirror.
	 */        
        public JFOperationMirror(JFPage page,Object obj,double baseX){
        	m_page	=page;
		setActionId(JFOperation.OPER_MIRROR);
		
		if (obj instanceof AbstractObject){
			AbstractObject aObj	=(AbstractObject)obj;
			setObjectId(aObj.getObjectId());
			List l	=new ArrayList();
			l.add(aObj);
			setModifyPortsList(l);
		}else{
			List aList	=(List)obj;
			setObjectList(aList);
			setModifyPortsList(aList);
		}
		m_baseX	=baseX;
	}


	/** undo this operation
	 *  @return new objects selected
	 */
	public List undo(){
		List objList	=getObjectList();
		Iterator it	=objList.iterator();
		while (it!=null && it.hasNext()){
			AbstractShape	aShape	=(AbstractShape)it.next();
			aShape.mirrorBy(m_baseX);
		}

		//restore ports list first.
		restorePorts();		
		moveRelationalPorts();
		
		return objList;
	}

	/** redo this operation
	 *  @return new objects selected
	 */
	public List redo(){
		List objList	=getObjectList();
		Iterator it	=objList.iterator();
		while (it!=null && it.hasNext()){
			AbstractShape	aShape	=(AbstractShape)it.next();
			aShape.mirrorBy(m_baseX);
		}

		moveRelationalPorts();
	
		return objList;
	}

}