XNA 4.0 Game Development by Example Beginner's Guide

Time for action – handling mouse input

1. Add the HandleMouseInput() helper method to the Game1 class:

   private void HandleMouseInput(MouseState mouseState)
   {
   
       int x = ((mouseState.X -
           (int)gameBoardDisplayOrigin.X) / GamePiece.PieceWidth);
   
       int y = ((mouseState.Y -
           (int)gameBoardDisplayOrigin.Y) / GamePiece.PieceHeight);
   
       if ((x >= 0) && (x < GameBoard.GameBoardWidth) &&
         (y >= 0) && (y < GameBoard.GameBoardHeight))
       {
           if (mouseState.LeftButton == ButtonState.Pressed)
           {
               gameBoard.RotatePiece(x, y, false);
               timeSinceLastInput = 0.0f;
           }
   
           if (mouseState.RightButton == ButtonState.Pressed)
           {
               gameBoard.RotatePiece(x, y, true);
               timeSinceLastInput = 0.0f;
           }
       }
   }

What just happened?

The MouseState class reports the X and Y position of the mouse relative to the upper ...