public class Ball
{
public event EventHandler BallInPlay;
public void OnBallInPlay(BallEventArgs e)
{
if (BallInPlay != null)
{
BallInPlay(this, e);
}
}
}
public class BallEventArgs : EventArgs
{
public int Trajectory { get; private set; }
public int Distance { get; private set; }
public BallEventArgs(int Trajectory, int Distance)
{
this.Trajectory = Trajectory;
this.Distance = Distance;
}
}
public class Fan
{
public Fan(Ball ball)
{
ball.BallInPlay += new EventHandler(ball_BallInPlay);
}
public void ball_BallInPlay(object sender, EventArgs e)
{
if (e is BallEventArgs)
{
BallEventArgs ballEventArgs = e as BallEventArgs;
if (ballEventArgs.Distance > 400 && ballEventArgs.Trajectory > 30)
{
Console.WriteLine("Fan: Home Run! I'm going for the ball!");
}
else
{
Console.WriteLine("Fan: Woo-hoo! Yeah!");
}
}
}
}
public class Pitcher
{
public Pitcher(Ball ball)
{
ball.BallInPlay += new EventHandler(ball_BallInPlay);
}
void ball_BallInPlay(object sender, EventArgs e)
{
if (e is BallEventArgs)
{
BallEventArgs ballEventArgs = e as BallEventArgs;
if (ballEventArgs.Distance < 95 && ballEventArgs.Trajectory < 60)
{
CatchBall();
}
else
{
CorverFirstBase();
}
}
}
private void CatchBall()
{
Console.WriteLine("Pitcher: I caught the ball!");
}
private void CorverFirstBase()
{
Console.WriteLine("Pitcher: I corvered first base.");
}
}
class Program
{
static void Main(string[] args)
{
Ball ball = new Ball();
Pitcher pitcher = new Pitcher(ball);
Fan fan = new Fan(ball);
BallEventArgs ballEventArgs = new BallEventArgs(100, 40);
ball.OnBallInPlay(ballEventArgs);
}
}