package simple_uml.view.canvas;

import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.geom.Line2D;

/**
 * Illustrations some kind of relationship (association, parentage, etc.) 
 * between two shapes on the canvas. You can extend this class to display the
 * different kinds of arrows necessary for the UML relationship you need to 
 * draw.
 *
 * @author Eric Liebowitz
 * @version 08jul11
 */
public class Relationship extends SumlShape
{
   /**
    * Point we'll hook the src to
    */
   private Hook src;
   private Hook dst;

   public Relationship (SumlShape s1, SumlShape s2)
   {
      src = new Hook(s1);
      dst = new Hook(s2);
   }

   protected void draw (Graphics2D g2d)
   {
      AffineTransform at = g2d.getTransform();
      at.setToIdentity();
      g2d.setTransform(at);
      g2d.draw(new Line2D.Double(src.getPoint().getX(), 
                                 src.getPoint().getY(),
                                 dst.getPoint().getX(),
                                 dst.getPoint().getY()));
   }
}