import java.awt.*;
import java.applet.*;

/**
 * A simple circle class with a little bit of extra 
 * facilities.
 *
 * @author Samuel A. Rebelsky
 * @version 1.0 of February 1999
 */
public class NewCircle {

  // +--------+--------------------------------------------------
  // | Fields |
  // +--------+

  /** The current color of the circle. */
  protected Color color;

  /**  
   * The ``opposite'' of the current color. Used for outlining
   * the circle.  This is not part of the assignment, but was done
   * for ``extra credit'' as it were.
   */
  protected Color opposite;

  /** The current diameter of the circle. */
  protected int diameter;

  // +--------------+--------------------------------------------
  // | Constructors |
  // +--------------+

  /**
   * Create a new circle with specified diameter and color.
   */
  public NewCircle(int diameter, Color color) {
     this.diameter = diameter;
     this.setColor(color);
  } // NewCircle(int, Color)

  /**
   * Create a new circle with specified diameter and default color.
   */
  public NewCircle(int diameter) {
    this.diameter = diameter;
    this.setColor(Color.blue);	// Blue is as good a default as any.
  } // NewCircle(int)


  // +---------+-------------------------------------------------
  // | Methods |
  // +---------+

  /**
   * Draw this circle centered at a particular position in a
   * graphics thingy.  To make it look more interesting, I outline
   * the circle in some color.
   */
  public void draw(int x, int y, Graphics g) {
    g.setColor(this.color);
    g.fillOval(
      x-this.diameter/2, 	// Left margin
      y-this.diameter/2, 	// Top margin
      this.diameter, 		// Width
      this.diameter);		// Height
    g.setColor(this.opposite);
    g.drawOval(
      x-this.diameter/2, 	// Left margin
      y-this.diameter/2, 	// Top margin
      this.diameter, 		// Width
      this.diameter);		// Height
  } // draw(int,int,Graphics)

  /**
   * Get the diameter of this circle.
   */
  public int getSize() {
    return this.diameter;
  } // getSize()

  /**
   * Set the color of this circle.
   */
  public void setColor(Color newColor) {
    this.color = newColor;
    // The opposite has RGB ``rotated'' by 128.  Not quite
    // opposite, but perhaps good enough for most purposes
    // (and nice in that the opposite of (128,128,128) is not
    // (127,127,127)).
    this.opposite = 
      new Color((this.color.getRed() + 128) % 256,
                (this.color.getGreen() + 128) % 256,
                (this.color.getBlue() + 128) % 256);
  } // setColor(Color)

  /**
   * Set the diameter of this circle.
   */
  public void setSize(int newDiameter) {
    this.diameter = newDiameter;
  } // setSize(int)

} // class NewCircle