/*	file BncExprApp.java	...    Hacked by RRS*/
import	java.awt.*;
import java.applet.*;
public	class BncExprApp  extends Applet
	{ 
		Canvas canvas;
		boolean live = true;

		public void init( )
			{
				setLayout( new BorderLayout( ) );
				resize( 300, 200 );
				show( );
			}

		public void start( )
			{
				//setTitle( "BncExprApp" );
				live = true;
				canvas = new Canvas( );
				add( "Center", canvas );
				Panel p = new Panel( );
				p.add( new Button( "Start" ) );
				p.add( new Button( "Express" ) );
				p.add( new Button( "Quit" ) );
				add( "South", p);
			}

		public boolean handleEvent( Event evt )
			 {
				if ( evt.id == Event.WINDOW_DESTROY ) {
					live = false; stop();}
		 		return super.handleEvent( evt );
			  }

		public boolean action( Event evt, Object arg )
			{
				if( arg.equals( "Start" ) )
					{
						live = true;
						Ball b = new Ball( canvas, Color.black, this);
						b.setPriority( Thread.NORM_PRIORITY);
						b.start( );
					}
				else if (arg.equals( "Express" ) )
					{
						live = true;
						Ball b = new Ball( canvas, Color.red, this);
						b.setPriority( Thread.NORM_PRIORITY + 2);
						b.start( );
					}
				else if (arg.equals( "Quit" ) ) 
					{
					 	//Thread.currentThread().stop();
						Event  e1 = new Event( this,
							Event.WINDOW_DESTROY, "Quit" );
						live = false;
						stop();
						return super.handleEvent( e1);
						
					}
				else return super.action( evt, arg);
				return true;
			}
	}

class Ball extends Thread
	{
		BncExprApp daddy;
		Canvas box;
		Color color;
		private static final int XSIZE = 10, YSIZE = 10;
		private int x = 0, y = 0, dx = 2, dy = 2;

		Ball ( Canvas c, Color co, BncExprApp parent ) { box = c; color = co; daddy = parent; }

		public void draw( )
			{
				Graphics g = box.getGraphics( );
				g.setColor( color );
				g.setXORMode( box.getBackground( ));
				g.fillOval( x, y, XSIZE, YSIZE );
				g.dispose( );
			}

		public void move( )
			{
				Graphics g = box.getGraphics( );
				g.setColor( color );
				g.setXORMode( box.getBackground( ));
				g.fillOval( x, y, XSIZE, YSIZE );
				x += dx;
				y += dy;
				Dimension d = box.size( );
				if ( x < 0 ) { x = 0; dx = -dx; }
				if ( x + XSIZE >= d.width) { x = d.width - XSIZE; dx = -dx; }
				if ( y < 0 ) { y = 0; dy = -dy; }
				if ( y + YSIZE >= d.height) { y = d.height - YSIZE; dy = -dy; }
				g.fillOval( x, y, XSIZE, YSIZE );
				g.dispose( );
			}

		public void run( )
			{
				draw( );
				for( int i =1; i < 1000; i++ )
					{
						if ( !daddy.live ) break;
						move( );
						try { sleep( 5 ); }
						catch ( InterruptedException e) { };
					}
				draw( );
			}
	}