2017-12-13 04:05:18 +00:00
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE RankNTypes #-}
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2017-12-13 03:37:16 +00:00
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module Affection.Subsystems.AffectionMouse 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
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import Linear.Affine (unP)
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import qualified SDL
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2017-12-13 04:05:18 +00:00
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data AffectionMouse sd = AffectionMouse
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{ mouseSubscribers :: forall sd. TVar [(UUID, MouseMessage -> Affection sd ())]
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}
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instance Participant (AffectionMouse sd) MouseMessage where
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partSubscribe p funct = do
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uuid <- genUUID
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liftIO $ atomically $ modifyTVar' (mouseSubscribers p) ((uuid, funct) :)
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return uuid
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partUnSubscribe p uuid =
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liftIO $ atomically $ modifyTVar' (mouseSubscribers p)
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(filter (\(u, _) -> u /= uuid))
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partSubscribers p = do
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subTups <- liftIO $ readTVarIO $ mouseSubscribers p
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return $ map snd subTups
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instance SDLSubsystem (AffectionMouse sd) MouseMessage where
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consumeSDLEvents am 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.MouseMotionEvent dat -> do
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partEmit am (MsgMouseMotion
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(SDL.eventTimestamp e)
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(SDL.mouseMotionEventWindow dat)
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(SDL.mouseMotionEventWhich dat)
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(SDL.mouseMotionEventState dat)
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(unP $ SDL.mouseMotionEventPos dat)
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(SDL.mouseMotionEventRelMotion dat)
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)
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doConsume es
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SDL.MouseButtonEvent dat -> do
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partEmit am (MsgMouseButton
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(SDL.eventTimestamp e)
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(SDL.mouseButtonEventWindow dat)
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(SDL.mouseButtonEventWhich dat)
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(SDL.mouseButtonEventButton dat)
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(SDL.mouseButtonEventClicks dat)
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(unP $ SDL.mouseButtonEventPos dat)
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)
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doConsume es
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SDL.MouseWheelEvent dat -> do
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partEmit am (MsgMouseWheel
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(SDL.eventTimestamp e)
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(SDL.mouseWheelEventWindow dat)
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(SDL.mouseWheelEventWhich dat)
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(SDL.mouseWheelEventPos dat)
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(SDL.mouseWheelEventDirection dat)
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)
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doConsume es
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_ -> fmap (e :) (doConsume es)
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