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