Graphics.UI.SDL.Joystick

Documentation

countAvailable :: IO Int

Counts the number of joysticks attached to the system.

tryName :: JoystickIndex -> IO (Maybe String)

Gets joystick name. Returns Nothing on error.

name :: JoystickIndex -> IO String

Gets joystick name. Throws an exception on error.

tryOpen :: JoystickIndex -> IO (Maybe Joystick)

Opens a joystick for use. Returns Nothing on error.

open :: JoystickIndex -> IO Joystick

Opens a joystick for use. Throws an exception on error.

opened :: JoystickIndex -> IO Bool

Determines if a joystick has been opened.

index :: Joystick -> JoystickIndex

Gets the index of an Joystick.

axesAvailable :: Joystick -> Int

Gets the number of joystick axes.

ballsAvailable :: Joystick -> Int

Gets the number of joystick trackballs.

hatsAvailable :: Joystick -> Int

Gets the number of joystick hats.

buttonsAvailable :: Joystick -> Int

Gets the number of joystick buttons.

update :: IO ()

Updates the state of all joysticks.

getAxis :: Joystick -> Word8 -> IO Int16

Gets the current state of an axis.

getHat :: Joystick -> Word8 -> IO [Hat]

Gets the current state of a joystick hat.

getButton :: Joystick -> Word8 -> IO Bool

Gets the current state of a given button on a given joystick.

getBall :: Joystick -> Word8 -> IO (Maybe (Int16, Int16))

Gets relative trackball motion.

close :: Joystick -> IO ()

Force finalization of a previous opened Joystick. Only supported with GHC.