StreamSubscriber<T> mixin
A minimal set of methods to add and manage StreamSubscriptions on any class.
Once mixed into a class, listeners can be created and removed with the addListener and removeListener methods respectively.
Call notifyListeners to notify all listeners of any of an event
and optionally pass event data down the StreamSink.
The StreamController is created once on initialization as
updateNotifier. Once closed, it cannot be reopened.
Any class that mixes in StreamSubscriber should call closeStream or
dispose when it is no longer needed. If the implementing class overrides
dispose, closeStream should be called by the overridden dispose method
unless its called elsewhere.
- Mixin Applications
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListener → bool
-
Returns
trueif there are any active listeners.no setter - numberOfListeners → int
-
Returns the number of active listeners.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
addListener(
OnUpdate< T> onUpdate) → StreamSubscription<T> - Creates, stores and returns a listener.
-
dispose(
) → void - Cancels any active listeners and closes the stream.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
T event) → void - Notifies all subscribed listeners of an event.
-
removeListener(
) → void - Cancels and removes a StreamSubscription.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited