Question

I am developing a Arkanoid (Breakout) game on Windows Phone 7.

I added a handler to the base of my GamePage constructor:

public GamePage()
    {
        InitializeComponent();

        // Get the content manager from the application
        contentManager = (Application.Current as App).Content;

        // Create a timer for this page
        timer = new GameTimer();
        timer.UpdateInterval = TimeSpan.FromTicks(333333);
        timer.Update += OnUpdate;
        timer.Draw += OnDraw;

        base.OnMouseMove += new MouseEventHandler(GamePage_MouseMove);

        init();
    }

And this is the handling function:

private void GamePage_MouseMove(object sender, MouseEventArgs e)
    {
        //this changes the ball coordinates based on yVel and xVel properties of the ball
        ball.moveBall();
    }

The GamePage_MouseMove function is never called and I dont know why. The ball is not moving.

Another issue is the onUpdate function:

private void OnUpdate(object sender, GameTimerEventArgs e)
    {
        //if the ball rectangle intersects with the paddle rectange, change the ball yVel
        if (ball.BallRec.Intersects(paddle.PaddleRec))
            ball.YVel = -1;
        ball.moveBall();
    }

Even if the ball intersects with the paddle it continues to move to the original direction and doesnt “bounce”.

Please help.

Update

After a small modification the onUpdate function is now:

private void OnUpdate(object sender, GameTimerEventArgs e)
    {
        MouseState ms = Mouse.GetState();
        if(ms.LeftButton == ButtonState.Pressed)
            paddle.movePaddle((int)ms.X);
    }

But the paddle is not moving.

Answer 1

You should consider inspecting the MouseState structure during your Update rather than trying to capture mouse events.

Something along the lines of:

protected override void Update(GameTime gameTime)
{
  // snip...

  MouseState mouseState = Mouse.GetState();

  //Respond to the position of the mouse.
  //For example, change the position of a sprite 
  //based on mouseState.X or mouseState.Y

  //Respond to the left mouse button being pressed
  if (mouseState.LeftButton == ButtonState.Pressed)
  {
    //The left mouse button is pressed. 
  }

  base.Update(gameTime);
}

There is a great example of how to use the mouse as an input device in the documentation: http://msdn.microsoft.com/en-us/library/bb197572.aspx

In addition, for the phone, remember that you have true touch capabilities as well as the accelerometer available to you. You can learn about all the input options here: http://msdn.microsoft.com/en-us/library/bb203899.aspx