pituicat/src/Affection/Subsystems/AffectionKeyboard.hs
2017-12-12 13:10:55 +01:00

45 lines
1.3 KiB
Haskell

{-# LANGUAGE MultiParamTypeClasses #-}
module Affection.Subsystems.AffectionKeyboard where
import Affection.MessageBus
import Affection.Subsystems.Class
import Affection.Types
import Control.Monad.IO.Class (liftIO)
import qualified SDL
data AffectionKeyboard = AffectionKeyboard
{ keyboardInChannel :: Channel KeyboardMessage
, keyboardOutChannel :: Channel KeyboardMessage
}
instance Participant AffectionKeyboard KeyboardMessage where
partChannel = keyboardOutChannel
partInit ichan = do
ochan <- liftIO $ newBroadcastChannel
return $ AffectionKeyboard ichan ochan
partListen p =
liftIO $ tryPeekChannel (keyboardInChannel p)
partEmit p m =
liftIO $ writeChannel (keyboardOutChannel p) m
instance SDLSubsystem AffectionKeyboard KeyboardMessage where
consumeSDLEvents ak evs = doConsume evs
where
doConsume [] = return []
doConsume (e:es) = case SDL.eventPayload e of
SDL.KeyboardEvent dat -> do
partEmit ak (MsgKeyboardEvent
(SDL.eventTimestamp e)
(SDL.keyboardEventWindow dat)
(SDL.keyboardEventKeyMotion dat)
(SDL.keyboardEventRepeat dat)
(SDL.keyboardEventKeysym dat)
)
doConsume es
_ -> fmap (e :) (doConsume es)