jfellipsepoint.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 176 行

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


import com.jfimagine.jfgraph.geom.Angle;
import com.jfimagine.jfgraph.geom.JFVector;
 
 /**
 * JFEllipsePoint class.  This class is an assistant class used to represent 
 * a certain position on an ellispe.
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.00 $
 */  
 public class JFEllipsePoint extends JFPoint {

 
   /**
    *   a target side type is the type of the rectangle's side that the radiant line from center to this point intersects.
    *   note: the RECTANGLE means the outer rectangle of this ellipse.
    */
   private	int	m_targetSideType=0;

   /**
    *   a target point is the point that the radiant line from center to this point intersects the outer rectangle.
    */
   private	JFPoint m_targetPoint	=new JFPoint();

   /**
    *   Get the target side type of current point.
    *
    *   @return  The target side type.
    *
    */ 	
   public int getTargetSideType(){
   	return m_targetSideType;
   }

   /**
    *   Set the target side type of current point.
    *
    *   @param targetSideType   A new target side type
    *
    */ 	
   public void setTargetSideType(int targetSideType){
   	m_targetSideType	=targetSideType;
   }

   /**
    *   Get target point on one side of the outer rectangle.
    *
    *   @return  The target point on one side of the outer rectangle.
    *
    */ 	
   public JFPoint getTargetPoint(){
   	return m_targetPoint;
   }

	
   /**
    *   Set value of current JFEllipsePoint.
    *
    *   @param val  A new JFEllipsePoint object.
    *
    */ 	
   public void setValue(JFEllipsePoint pnt){
   	if (pnt==null)
   		return;
   		
   	super.setValue(pnt.getX(),pnt.getY());
   	m_targetSideType =pnt.getTargetSideType();
   	m_targetPoint.setValue(pnt.getTargetPoint());
   }


   /**
    *   Constructor for JFEllipsePoint.
    *   Default to 0 for x and y coordinates.
    *
    */ 	
   public JFEllipsePoint(){
   }

   /**
    *   Constructor for JFEllipsePoint.
    *
    *   @param pnt A JFEllipsePoint.
    *
    */ 	
   public JFEllipsePoint(JFEllipsePoint pnt){
   	setValue(pnt);
   }


   /**
    *   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(";targetSideType="); buf.append(m_targetSideType);
  	buf.append(";targetPoint="); buf.append(m_targetPoint);
  	
  	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 JFEllipsePoint(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_targetSideType ^
  		m_targetPoint.hashCode();
  }


   /**
    *   Determines whether or not two objects are equal. 
    * 
    * 	@param obj  an object to be compared with this object 
    * 	@param analog True if use integer type to compare two points,False use double.
    * 
    *   @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, boolean analog){

      if (super.equals(obj,analog))
      	return true;
      	

      if (obj == this)
             	return true;

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

      JFEllipsePoint	pnt	=(JFEllipsePoint)obj;
      
      return    m_targetSideType==pnt.getTargetSideType() && 
      		m_targetPoint.equals(pnt.getTargetPoint(),analog);
      		
  }



}