System.Hardware.Linux.Joystick

Interpret events from a Linux joystick, which must conform to the Linux Joystick API <https://www.kernel.org/doc/Documentation/input/joystick-api.txt>.

Types and values

data Joystick

Joystick data. See <https://www.kernel.org/doc/Documentation/input/joystick-api.txt> for details.

Constructors

Joystick

Fields

• timestamp :: Int

  The event timestamp in milliseconds.

• value :: Int

  The data value.

• number :: Int

  The button or axis number.

• button :: Bool

  Whether the button is being reported.

• axis :: Bool

  Whether the axis is being reported.

• initial :: Bool

  Whether the initial value is being reported.

Instances

Eq Joystick

Defined in System.Hardware.Linux.Joystick

Methods

(==) :: Joystick -> Joystick -> Bool

(/=) :: Joystick -> Joystick -> Bool

Ord Joystick

Defined in System.Hardware.Linux.Joystick

Methods

compare :: Joystick -> Joystick -> Ordering

(<) :: Joystick -> Joystick -> Bool

(<=) :: Joystick -> Joystick -> Bool

(>) :: Joystick -> Joystick -> Bool

(>=) :: Joystick -> Joystick -> Bool

max :: Joystick -> Joystick -> Joystick

min :: Joystick -> Joystick -> Joystick

Read Joystick

Defined in System.Hardware.Linux.Joystick

Methods

readsPrec :: Int -> ReadS Joystick

readList :: ReadS [Joystick]

readPrec :: ReadPrec Joystick

readListPrec :: ReadPrec [Joystick]

Show Joystick

Defined in System.Hardware.Linux.Joystick

Methods

showsPrec :: Int -> Joystick -> ShowS

show :: Joystick -> String

showList :: [Joystick] -> ShowS

Generic Joystick

Defined in System.Hardware.Linux.Joystick

Associated Types

type Rep Joystick :: Type -> Type

Methods

from :: Joystick -> Rep Joystick x

to :: Rep Joystick x -> Joystick

ToJSON Joystick

Defined in System.Hardware.Linux.Joystick

Methods

toJSON :: Joystick -> Value

toEncoding :: Joystick -> Encoding

toJSONList :: [Joystick] -> Value

toEncodingList :: [Joystick] -> Encoding

FromJSON Joystick

Defined in System.Hardware.Linux.Joystick

Methods

parseJSON :: Value -> Parser Joystick

parseJSONList :: Value -> Parser [Joystick]

Binary Joystick

Defined in System.Hardware.Linux.Joystick

Methods

put :: Joystick -> Put

get :: Get Joystick

putList :: [Joystick] -> Put

Serialize Joystick

Defined in System.Hardware.Linux.Joystick

Methods

put :: Putter Joystick

get :: Get Joystick

type Rep Joystick

Defined in System.Hardware.Linux.Joystick

type Rep Joystick = D1 (MetaData "Joystick" "System.Hardware.Linux.Joystick" "kafka-device-joystick-1.0.2.1-2LWdfhNoKX43OfVatFy20z" False) (C1 (MetaCons "Joystick" PrefixI True) ((S1 (MetaSel (Just "timestamp") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int) :*: (S1 (MetaSel (Just "value") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int) :*: S1 (MetaSel (Just "number") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int))) :*: (S1 (MetaSel (Just "button") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Bool) :*: (S1 (MetaSel (Just "axis") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Bool) :*: S1 (MetaSel (Just "initial") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Bool)))))

minValue :: Int

The minimum for value.

maxValue :: Int

The maximum for value.

byteLength :: Integral a => a

The number of bytes in a joystick event.

Event handling

interpretJoystick

Arguments

:: ByteString

The eight bytes.

-> Joystick

The corresponding joystick data.

Interpret Linux Joystick bytes accoding to <https://www.kernel.org/doc/Documentation/input/joystick-api.txt>.

readJoystick

Arguments

:: FilePath

The joystick device, e.g., "/dev/input/js0".

-> IO [Joystick]

Action to read the joystick data.

Read a stream of joystick data.