/*
 * File: RingShadow.java
 * ---------------------
 * This program draws a ring and its shadow. This
 * version of the program draws several circles to make the rings
 * wider. Some coordinate values are explicit.
 *
 * As of Chapter 2, you don't yet have methods or the loop
 * statements and would therefore have to write this program
 * using a single unsubdivided run method;
 * this code shows the program as you will eventually write it.
 *
 * Author: CS1MD3
 */

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class RingShadow extends GraphicsProgram {

   public void run() {
   /* draw the shadow */
   addRing(250, 180, Color.GRAY);
   /* draw the ring above the shadow */
   addRing(250, 150, Color.YELLOW);
   }

/*
 * Adds a ring to the canvas at position (*x*, *y*) and of color
 * *color*. The radius of the ring is RING_RADIUS and the thickness
 * is THICKNESS pixels.
 */
   private void addRing(int x, int y, Color color) {
      int height = RING_RADIUS / 2;
      /* draw ring THICKNESS times to make the ring wider */
	for (int i = 0; i < THICKNESS; i++) {
	   GOval ring = new GOval(x + i, y + i, 2 * (RING_RADIUS - i), 2 * (height - i));
	   ring.setColor(color);
           ring.setFilled(false);
	   add(ring);
	} /* for i */
   } /* addRing */

/* Private constants */
   private static final int RING_RADIUS = 100;
   private static final int THICKNESS = 10;

}