FRP.Sodium.Internal

Documentation

listenTrans :: Event a -> (a -> Reactive ()) -> Reactive (IO ())

Variant of listen that allows you to initiate more activity in the current transaction. Useful for implementing new primitives.

listenValueTrans :: Behavior a -> (a -> Reactive ()) -> Reactive (IO ())

Variant of listenValue that allows you to initiate more activity in the current transaction. Useful for implementing new primitives.

schedulePrioritized :: Maybe (IORef Node) -> Reactive () -> Reactive ()

Queue the specified atomic to run at the end of the priority 2 queue

scheduleLast :: Reactive () -> Reactive ()

data Listen a

Constructors

Listen

Fields

runListen_ :: Maybe (IORef Node) -> Bool -> (a -> Reactive ()) -> Reactive (IO ())

getListen :: Event a -> Reactive (Listen a)

Unwrap an event's listener machinery.

runListen :: Listen a -> Maybe (IORef Node) -> Bool -> (a -> Reactive ()) -> Reactive (IO ())

linkedListen :: Event a -> Maybe (IORef Node) -> Bool -> (a -> Reactive ()) -> Reactive (IO ())

Listen for firings of this event. The returned IO () is an IO action that unregisters the listener. This is the observer pattern.

data Node

Instances

PriorityQueueable (Maybe (IORef Node))

newEventLinked :: IO (Event a, a -> Reactive (), IORef Node)

Returns an event, and a push action for pushing a value into the event.

newEvent :: Reactive (Event a, a -> Reactive ())

Returns an event, and a push action for pushing a value into the event.

finalizeEvent :: Event a -> IO () -> Event a

Add a finalizer to an event.

finalizeListen :: Listen a -> IO () -> IO (Listen a)

Add a finalizer to a listener.

ioReactive :: IO a -> Reactive a

data Unlistener

addCleanup :: Unlistener -> Listen a -> Reactive (Listen a)

Cause the things listened to with unlistenize to be unlistened when the specified listener is not referenced any more.

unlistenize :: Reactive (IO ()) -> Reactive Unlistener

Listen to an input event/behavior and return an Unlistener that can be attached to an output event using addCleanup.