pituicat/src/Affection/Subsystems/AffectionKeyboard.hs
2017-12-13 15:53:51 +01:00

49 lines
1.4 KiB
Haskell

{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE RankNTypes #-}
module Affection.Subsystems.AffectionKeyboard where
import Affection.Types
import Affection.Util
import Affection.MessageBus
import Affection.Subsystems.Class
import Control.Concurrent.STM as STM
import Control.Monad.IO.Class (liftIO)
import qualified SDL
data AffectionKeyboard us = AffectionKeyboard
{ keyboardSubscribers :: forall us. TVar [(UUID, KeyboardMessage -> Affection us ())]
}
instance Participant (AffectionKeyboard us) KeyboardMessage where
partSubscribe p funct = do
uuid <- genUUID
liftIO $ atomically $ modifyTVar' (keyboardSubscribers p) ((uuid, funct) :)
return uuid
partUnSubscribe p uuid =
liftIO $ atomically $ modifyTVar' (keyboardSubscribers p)
(filter (\(u, _) -> u /= uuid))
partSubscribers p = do
subTups <- liftIO $ readTVarIO $ keyboardSubscribers p
return $ map snd subTups
instance SDLSubsystem (AffectionKeyboard us) KeyboardMessage where
consumeSDLEvents ak eps = doConsume eps
where
doConsume (e:es) = do
ts <- getElapsedTime
case e of
SDL.KeyboardEvent dat -> do
partEmit ak (MsgKeyboardEvent
ts
(SDL.keyboardEventWindow dat)
(SDL.keyboardEventKeyMotion dat)
(SDL.keyboardEventRepeat dat)
(SDL.keyboardEventKeysym dat)
)
doConsume es
_ -> fmap (e :) (doConsume es)