pituicat/src/Affection/Subsystems/AffectionMouse.hs
2017-12-13 05:05:18 +01:00

69 lines
2.1 KiB
Haskell

{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE RankNTypes #-}
module Affection.Subsystems.AffectionMouse where
import Affection.MessageBus
import Affection.Subsystems.Class
import Affection.Types
import Control.Monad.IO.Class (liftIO)
import Control.Concurrent.STM
import Linear.Affine (unP)
import qualified SDL
data AffectionMouse sd = AffectionMouse
{ mouseSubscribers :: forall sd. TVar [(UUID, MouseMessage -> Affection sd ())]
}
instance Participant (AffectionMouse sd) MouseMessage where
partSubscribe p funct = do
uuid <- genUUID
liftIO $ atomically $ modifyTVar' (mouseSubscribers p) ((uuid, funct) :)
return uuid
partUnSubscribe p uuid =
liftIO $ atomically $ modifyTVar' (mouseSubscribers p)
(filter (\(u, _) -> u /= uuid))
partSubscribers p = do
subTups <- liftIO $ readTVarIO $ mouseSubscribers p
return $ map snd subTups
instance SDLSubsystem (AffectionMouse sd) MouseMessage where
consumeSDLEvents am evs = doConsume evs
where
doConsume [] = return []
doConsume (e:es) = case SDL.eventPayload e of
SDL.MouseMotionEvent dat -> do
partEmit am (MsgMouseMotion
(SDL.eventTimestamp e)
(SDL.mouseMotionEventWindow dat)
(SDL.mouseMotionEventWhich dat)
(SDL.mouseMotionEventState dat)
(unP $ SDL.mouseMotionEventPos dat)
(SDL.mouseMotionEventRelMotion dat)
)
doConsume es
SDL.MouseButtonEvent dat -> do
partEmit am (MsgMouseButton
(SDL.eventTimestamp e)
(SDL.mouseButtonEventWindow dat)
(SDL.mouseButtonEventWhich dat)
(SDL.mouseButtonEventButton dat)
(SDL.mouseButtonEventClicks dat)
(unP $ SDL.mouseButtonEventPos dat)
)
doConsume es
SDL.MouseWheelEvent dat -> do
partEmit am (MsgMouseWheel
(SDL.eventTimestamp e)
(SDL.mouseWheelEventWindow dat)
(SDL.mouseWheelEventWhich dat)
(SDL.mouseWheelEventPos dat)
(SDL.mouseWheelEventDirection dat)
)
doConsume es
_ -> fmap (e :) (doConsume es)