jfchord.java

用Java开发的、实现类似Visio功能的应用程序源码

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


import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.GeneralPath;

import com.jfimagine.jfgraph.geom.JFPoint;
import com.jfimagine.jfgraph.geom.Arc;
import com.jfimagine.jfgraph.geom.Rect;
import com.jfimagine.jfgraph.geom.JFArcPoint;

import com.jfimagine.jfgraph.shape.base.Port;
import com.jfimagine.jfgraph.shape.base.ShapeConst;
import com.jfimagine.jfgraph.shape.base.AbstractObject;
import com.jfimagine.jfgraph.shape.arc.AbstractArc;
import com.jfimagine.jfgraph.shape.decorate.Arrow; 
 
 /**
 * JFChord class.  
 * A chord is part or whole of the curve of a circle, but with the start point and end point connected by a line segment.
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.00 $
 */  
 public class JFChord extends AbstractArc{

   /**
    *   A XML string tag represents an Chord
    */
   public  static final String	 XML_CHORD		="Chord";


   /**
    *   initialization for JFChord
    */
   private void initChord(){
   	setObjectType(ShapeConst.SHAPETYPE_CHORD);
   	setXMLTag(XML_CHORD);
   	m_arc.setArcType(Arc.CHORD);
   }	

   /**
    *   Constructor for JFChord
    */
   public JFChord(){
   	initChord();
   }	

   /**
    *   Constructor for JFChord
    */
   public JFChord(AbstractArc arc){
   	setArc(arc);
   	initChord();
   }	

   /**
    *   Constructor for JFChord
    *   @param x1,y1 start point of this chord
    *   @param x2,y2 end point of this chord
    */
   public JFChord(double x1,double y1, double x2, double y2){
   	initChord();
   	addNode(x1,y1);
   	addNode(x2,y2);
   	finishDrawing();
   }	


   /**
    *   Constructor for JFChord
    *   @param centerx,centery center point of this chord
    *   @param x1,y1 start point of this chord
    *   @param angle Angle of this chord.
    */
   public JFChord(double centerx, double centery,double x1,double y1, double angle){
   	initChord();
   	m_arc.setValue(new JFPoint(centerx,centery),new JFPoint(x1,y1),angle);
   	finishDrawing();
   }	
   
   

   /**
    *   Draw an arc on canvas, by specified line format.
    * 
    *   @param  g  A graphic canvas.	
    *   @param  isXorMode If is in xor mode now.
    *
    */ 	
   public void  drawArc(Graphics g, boolean isXorMode){
	
	GeneralPath	path	=getArcPath();
	path.closePath();

  	double zoom	=getZoomScale();
		
   	if (!isXorMode){
   		Rect rect	=getBounds();
   		rect.setValue(rect.getX() * zoom, rect.getY() * zoom, rect.getWidth() * zoom, rect.getHeight() * zoom);
   		m_fillFormat.draw(g,path,rect);
   		m_lineFormat.draw(g,path);
   	}else
   		((Graphics2D)g).draw(path);
   }



   /**
    *   Creates a new AbstractObject of the same class and with the same contents as this object.
    *   This method implements the method defined in AbstractObject.
    * 
    *   @return  A clone of this class.
    *
    */ 	
  protected AbstractObject cloneMe() throws CloneNotSupportedException{
  	return new JFChord();
  }

   /**
    *   Init all ports of this shape.
    *   An object will always has its one or more stable ports and some customized ports,
    */ 	
   protected void initPorts(){

   	if (m_portList.size()==0){
   		try{
			JFPoint  startPoint   	=m_arc.getStartPoint();
			JFPoint  endPoint   	=m_arc.getEndPoint();
			JFPoint  controlPoint  	=m_arc.getControlPoint();
			
			m_portList.addPort(new ArcPort(this,Port.PORTTYPE_DEFAULT,controlPoint,0.5,JFArcPoint.POINTTYPE_CURVE));
			m_portList.addPort(new ArcPort(this,Port.PORTTYPE_DEFAULT,startPoint.midPoint(endPoint),0.5,JFArcPoint.POINTTYPE_CHORD));

   		}catch(Exception e){
   		}
   	}  

	m_portList.setZoomScale(getZoomScale());
   	
   }


   /**
    *   Get the arrow format of current object.
    * 
    *   @return  The arrow format.
    *
    */ 	
   public Arrow getArrow(){
   	return null;
   }

   /**
    *   Set the arrow format of current object.
    *
    *   @param arrow  A new arrow format object.
    *
    */ 	
   public void setArrow(Arrow arrow){
   }



}