Time for action – handling mouse input

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

   Private Sub HandleMouseInput(mouseInfo As MouseState)
     Dim x, y As Integer
   
     x = mouseInfo.X - CInt(gameBoardDisplayOrigin.X)
     y = mouseInfo.Y - CInt(gameBoardDisplayOrigin.Y)
   
     x = x \ GamePiece.PieceWidth
     y = y \ GamePiece.PieceHeight
   
     If (x >= 0) And (x <= GameBoard.GameBoardWidth) And
       (y >= 0) And (y <= GameBoard.GameBoardHeight) Then
       If mouseInfo.LeftButton = ButtonState.Pressed Then
         _gameBoard.RotatePiece(x, y, False)
         timeSinceLastInput = 0
       End If
       If mouseInfo.RightButton = ButtonState.Pressed Then
         _gameBoard.RotatePiece(x, y, True)
         timeSinceLastInput = 0
       End If
     End If
   End Sub

What just happened?

The MouseState class reports the X and Y position of the mouse relative to the upper-left corner of the window. What we really need to know is what square on the game board the mouse was over.

We break the mouse position into X and...