/*
   Programmer:  Konstantin Lukin
   e-mail    :  lukink@ug.cs.sunysb.edu
*/

import java.awt.*;

public class Arrow extends Rectangle {
   
   // position (orientation) of the Arrow
   public static int EAST = 1;
   public static int WEST = 2;
   public static int NORTH = 3;
   public static int SOUTH = 4;
   
   // Constructor
   public Arrow(int x, int y, int width, int height, int orien) {
      super(x, y, width, height);
      this.orientation = orien;
      poly = new Polygon();
      setArrow();
   }
   
   public void setOrientation(int new_orient) {
      orientation = new_orient;
      setArrow();
   }
   
   public void draw(Graphics g) {
      g.drawPolygon(poly);
   }
   
   public void fill(Graphics g) {
      g.fillPolygon(poly);
   }
   
   private void setArrow() {
      Point p1, p2, p3;
      switch(orientation) {
         case 1:
            p1 = new Point(x, y);
            p2 = new Point(x+width, y+height/2);
            p3 = new Point(x, y+height);
            break;
         case 2:
            p1 = new Point(x+width, y);
            p2 = new Point(x, y+height/2);
            p3 = new Point(x+width, y+height);
            break;
         case 3:
            p1 = new Point(x, y+height);
            p2 = new Point(x+width/2, y);
            p3 = new Point(x+width, y+height);
            break;
         case 4:
            p1 = new Point(x, y);
            p2 = new Point(x+width/2, y+height);
            p3 = new Point(x+width, y);
            break;
         default:
            System.out.println("Arrow ==> error in setArrow");
            p1 = new Point(x, y);
            p2 = new Point(x+width/2, y+height);
            p3 = new Point(x+width, y);
      }
      
      poly.addPoint(p1.x, p1.y);
      poly.addPoint(p2.x, p2.y);
      poly.addPoint(p3.x, p3.y);
      poly.addPoint(p1.x, p1.y); // when drawing, complete polygon
   }     
   
   
private int orientation = 1;  // default
private Polygon poly;
}