jfpointnode.java

来自「用Java开发的、实现类似Visio功能的应用程序源码」· Java 代码 · 共 183 行

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


import com.jfimagine.jfgraph.geom.JFPoint;
 
 /**
 * JFPointNode class.  A point class used to represents a node of a Regular Line or poly line.
 *
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.00 $
 */  
public class JFPointNode extends JFPoint{


   	/** An END POINT point node type that the node is the beginning or end point or corner of the whole line*/
   	public static final int NODETYPE_END		=0;

   	/** An MIDDLE POINT point node type that the node is on the middle of one line segment*/
   	public static final int NODETYPE_MIDDLE		=1;
  
   	/** An SUB MIDDLE POINT point node type that the node is on the middle of corner point and middle point*/
   	public static final int NODETYPE_SUBMIDDLE	=2;

  	
  	/**
   	 * A node type variable.
   	 */
   	private int m_nodeType	=NODETYPE_END;

  	/**
   	 * Getter for node type
   	 * @return the node type.
   	 */
   	public int getNodeType(){
   		return m_nodeType;
   	}

  	/**
   	 * Setter for node type
   	 * @param nodeType the node type.
   	 */
   	public void setNodeType(int nodeType){
   		m_nodeType	=nodeType;
   	}

   	/**
    	*   Set value of current JFPointNode.
    	*
    	*   @param val  A new JFPoint object.
    	*
    	*/ 	
   	public void setValue(JFPointNode node){
   		super.setValue(node);
   		m_nodeType	=node.getNodeType();
   	}

   	/**
    	*   Set value of current JFPointNode.
    	*
    	*   @param x, y  A new JFPoint coordinates.
    	*
    	*   @param nodeType A new node type.
    	*/ 	
   	public void setValue(double x, double y, int nodeType){
   		super.setValue(x,y);
   		m_nodeType	=nodeType;
   	}
   	
   	/**
    	*   Constructor for JFPoint.
    	*   Default to 0 for x and y coordinates.
    	*
    	*/ 	
   	public JFPointNode(){
   	}

   	/**
    	*   Constructor for JFPoint.
    	*
    	*   @param x  X coordiate.
    	*
    	*   @param y  Y coordiate.
    	*
    	*   @param nodeType A new node type.
    	*
    	*/ 	
   	public JFPointNode(double x, double y, int nodeType){
   		setValue(x,y,nodeType);
   	}

   	/**
    	*   Constructor for JFPoint.
    	*
    	*   @param pnt A JFPoint.
    	*
    	*   @param nodeType A new node type.
    	*/ 	
   	public JFPointNode(JFPoint pnt, int nodeType){
   		setValue(pnt.getX(),pnt.getY(),nodeType);
   	}

   
   	/**
    	*   Constructor for JFPoint.
    	*
    	*   @param node A JFPointNode object.
    	*/ 	
   	public JFPointNode(JFPointNode node){
   		setValue(node);
   	}

      	
   	/**
    	*   Convert this object to String 
    	* 
    	*   @return  An string represents the content of the object
    	*
    	*/ 	
   	public String toString(){
  		StringBuffer buf =new StringBuffer();
  		buf.append(super.toString());
  		buf.append(";nodeType=");  	buf.append(m_nodeType);
  		return buf.toString();
   	}

 
   	/**
    	*   Creates a new object of the same class and with the same contents as this object.
    	* 
    	*   @return  A clone of this instance.
    	*
    	*/ 	
  	public Object clone() throws CloneNotSupportedException{
  		try{
  			return	new JFPointNode(this);
		}catch(Exception e){
			throw new CloneNotSupportedException(e.getMessage());
		}
  	}


   	/**
    	*   Returns the hashcode for this Object.
    	* 
    	*   @return hash code for this Point2D.
    	*
    	*/ 	
  	public int hashCode(){
  		return 	super.hashCode() ^ m_nodeType;
  	}


   	/**
    	*   Determines whether or not two objects are equal. 
    	* 
    	* 	@param obj  an object to be compared with this object 
    	* 
    	*   @return true if the object to be compared is an instance of Port and has the same values; false otherwise.
    	*
    	*/ 	
  	public boolean equals(Object obj){
      		if (obj == this)
             		return true;
             		
             	if (!super.equals(obj))
             		return false;	

      		if (!(obj instanceof JFPointNode))
            		return false;

      		JFPointNode node	=(JFPointNode)obj;
      
      		return	(m_nodeType==node.getNodeType());
  	}
   	
   }