I've a sprite that I want to control with keys

1

if (Keyboard.GetState().IsKeyDown(Keys.Down))
{

             positionoutercursor.Y += 40 ;
         }
         if (positionoutercursor.Y >=260)
        {
            positionoutercursor.Y = 260;
        }

        if (Keyboard.GetState().IsKeyDown(Keys.Up))
        {

            positionoutercursor.Y -= 40;
        }
        if (positionoutercursor.Y <= 15)
        {
            positionoutercursor.Y = 15;
        }

But when i press up or down the sprite moves much more than i want. The problem is that I want it move only 40 pixels to up or down each time I press these keys. I dont want it to continue adding 40 all the time according to time I press the key. Anyone can help me with this very simple question? (It ddoent pass the board limits I put but move 80 or 120 pixels each time)

2 
private KeyboardState _previousKeyboardState;

var keyboardState = Keyboard.GetState();
var moveDirection = Vector2.Zero;

if (keyboardState.IsKeyDown(Keys.Up) && _previousKeyboardState.IsKeyUp(Keys.Up))
    moveDirection -= Vector2.UnitY;
if (keyboardState.IsKeyDown(Keys.Down) && _previousKeyboardState.IsKeyUp(Keys.Down))
    moveDirection += Vector2.UnitY;

var deltaSeconds = (float)gameTime.ElapsedGameTime.TotalSeconds;
var speed = 40;
position += moveDirection * speed * deltaSeconds;

_previousKeyboardState = keyboardState;
1 Like
3

thats ok, thanks for the help. Isnt there any other simple way to do this? like, when key is pressed do this and then key is inactive!

4

Yeah I understand it seems like a lot of code just to check something simple as a when a key is pressed but that’s how to do it in XNA / MonoGame; you need 2 frames where the current frame has to have the key in a down state and the previous frame has to have the key in a up state.

1 Like