/* File:  mRectApplet.java */

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

public class mRectApplet extends Applet implements Runnable 
 {
  // Instance variables:
  private Thread thread;
  private mPoint object[] = new mPoint[2];
  private int x[] = { 10, 200 };  // initial x coordinates
  private int y[] = { 10,  10 };  // initial y coordinates


  // Override java.applet.Applet.init:
  public void init () 
  {
    setBackground( Color.black );

    object[0] = new mRectangle( x[0], y[0], 100, 100 );
    object[0].setDelta( 1, 1 );
    object[0].setColor( Color.red );
    
    object[1] = new mRectangle( x[1], y[1], 100, 100 );
    object[1].setDelta( -1, 1 );
    object[1].setColor( Color.blue );
  }

  // Override java.applet.Applet.start:
  public void start() 
  {
    if ( thread == null ) 
    {
      // Reinitialize (x,y) coordinates:
      object[0].setPoint( x[0], y[0] );
      object[1].setPoint( x[1], y[1] );

      // Start a new thread:
      thread = new Thread( this );
      thread.start();
    }
  }

  // Override java.applet.Applet.stop:
  public void stop() 
  {
    if ( thread != null ) 
    {
      thread.stop();
      thread = null ;
    }
  }

  // Implement java.lang.Runnable.run:
  public void run() 
  {
    while ( thread != null ) 
   {
      repaint();
      try 
      { Thread.sleep(20);
      } catch ( InterruptedException e ) 
      {   };         // Do nothing  
    }
   }

  // Override java.awt.Component.paint:
  public void paint( Graphics g ) 
  {
    // Move each object and then paint it:
    for ( int i = 0; i < object.length; i++ ) 
         { object[i].move(); object[i].paint(g); }
  }
}