affection/src/Affection/Subsystems/AffectionWindow.hs

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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE AllowAmbiguousTypes #-}
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module Affection.Subsystems.AffectionWindow where
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import Affection.Types
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import Affection.Util
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import Affection.MessageBus
import qualified SDL
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-- | Helper function that consumes all Window-related 'SDL.EventPayload's
-- and emits appropriate 'WindowMessage's.
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consumeSDLWindowEvents
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:: forall aw us. (Participant aw us, Mesg aw us ~ WindowMessage)
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=> aw -- ^ The message system participant
-> [SDL.EventPayload] -- ^ Incoming events
-> Affection us [SDL.EventPayload] -- ^ Leftover SDL events
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consumeSDLWindowEvents aw = doConsume
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where
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doConsume
:: (Mesg aw us ~ WindowMessage)
=> [SDL.EventPayload]
-> Affection us [SDL.EventPayload]
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doConsume [] = return []
doConsume (e:es) = do
ts <- getElapsedTime
case e of
SDL.WindowShownEvent (SDL.WindowShownEventData window) -> do
partEmit aw (MsgWindowShow ts window)
doConsume es
SDL.WindowHiddenEvent (SDL.WindowHiddenEventData window) -> do
partEmit aw (MsgWindowHide ts window)
doConsume es
SDL.WindowExposedEvent (SDL.WindowExposedEventData window) -> do
partEmit aw (MsgWindowExpose ts window)
doConsume es
SDL.WindowMovedEvent (SDL.WindowMovedEventData window (SDL.P newPos)) -> do
partEmit aw (MsgWindowMove ts window newPos)
doConsume es
SDL.WindowResizedEvent (SDL.WindowResizedEventData window newSize) -> do
partEmit aw (MsgWindowResize ts window newSize)
doConsume es
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SDL.WindowSizeChangedEvent (SDL.WindowSizeChangedEventData window size) -> do
partEmit aw (MsgWindowSizeChange ts window size)
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doConsume es
SDL.WindowMinimizedEvent (SDL.WindowMinimizedEventData window) -> do
partEmit aw (MsgWindowMinimize ts window)
doConsume es
SDL.WindowMaximizedEvent (SDL.WindowMaximizedEventData window) -> do
partEmit aw (MsgWindowMaximize ts window)
doConsume es
SDL.WindowRestoredEvent (SDL.WindowRestoredEventData window) -> do
partEmit aw (MsgWindowRestore ts window)
doConsume es
SDL.WindowGainedMouseFocusEvent (SDL.WindowGainedMouseFocusEventData window) -> do
partEmit aw (MsgWindowGainMouseFocus ts window)
doConsume es
SDL.WindowLostMouseFocusEvent (SDL.WindowLostMouseFocusEventData window) -> do
partEmit aw (MsgWindowLoseMouseFocus ts window)
doConsume es
SDL.WindowGainedKeyboardFocusEvent (SDL.WindowGainedKeyboardFocusEventData window) -> do
partEmit aw (MsgWindowGainKeyboardFocus ts window)
doConsume es
SDL.WindowLostKeyboardFocusEvent (SDL.WindowLostKeyboardFocusEventData window) -> do
partEmit aw (MsgWindowLoseKeyboardFocus ts window)
doConsume es
SDL.WindowClosedEvent (SDL.WindowClosedEventData window) -> do
partEmit aw (MsgWindowClose ts window)
doConsume es
_ -> fmap (e :) (doConsume es)