45 lines
1.3 KiB
Haskell
45 lines
1.3 KiB
Haskell
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{-# LANGUAGE MultiParamTypeClasses #-}
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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 qualified SDL
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data AffectionKeyboard = AffectionKeyboard
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{ keyboardInChannel :: Channel KeyboardMessage
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, keyboardOutChannel :: Channel KeyboardMessage
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}
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instance Participant AffectionKeyboard KeyboardMessage where
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partChannel = keyboardOutChannel
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partInit ichan = do
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ochan <- liftIO $ newBroadcastChannel
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return $ AffectionKeyboard ichan ochan
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partListen p =
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liftIO $ tryPeekChannel (keyboardInChannel p)
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partEmit p m =
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liftIO $ writeChannel (keyboardOutChannel p) m
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instance SDLSubsystem AffectionKeyboard 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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