AsyncNotifier<T> class

A ValueNotifier<T> that listens to Future and Stream snapshot.

Inheritance
Available extensions

Constructors

AsyncNotifier({T? data, Object? error, StackTrace stackTrace = StackTrace.empty, ConnectionState state = ConnectionState.none, void onData(T data)?, void onError(Object error, StackTrace stackTrace)?, void onDone()?, bool? cancelOnError})
Creates an AsyncNotifier instance with an initial value of type T.

Properties

cancelOnError → bool?
Whether the subscription should be canceled when an error occurs.
final
data → T?

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
error → Object?

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
errorMessage → String?

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
future ↔ Future<T>?
The Future currently being listened to.
getter/setter pair
hasData → bool

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
hasError → bool

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
hasNone → bool

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
isLoading → bool

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
isReloading → bool

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
requireData → T

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
snapshot → AsyncSnapshot<T>
The current AsyncSnapshot of this AsyncListenable.
no setter
stackTrace → StackTrace?

Available on ValueListenable<AsyncSnapshot<T>>, provided by the AsyncListenableExtension extension

no setter
stream ↔ Stream<T>?
The Stream currently being listened to.
getter/setter pair
value ↔ AsyncSnapshot<T>
The current value stored in this notifier.
getter/setter pairoverride

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
cancel() → void
Unsubscribes to existing Future or Stream and sets snapshot to 'none'.
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
onData(T data) → void
Callback when new data is available.
onDone() → void
Callback when the async operation is done.
onError(Object error, StackTrace stackTrace) → void
Callback when an error occurs.
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator <<(Listenable other) → T

Available on T, provided by the ChangeNotifierSyncExtension extension

Receives notifications from a Listenable.
operator ==(Object other) → bool
The equality operator.
inherited
operator >>(ChangeNotifier other) → T

Available on T, provided by the ListenableSyncExtension extension

Sends notifications to a ChangeNotifier.

Static Properties

observer ↔ AsyncNotifierObserver?
The current global observer for AsyncNotifier instances.
getter/setter pair