TimestampBeacon<T> class

A beacon that attaches a timestamp to its value.

Inheritance

Constructors

TimestampBeacon({T? initialValue, String? name})
@macro TimestampBeacon

Properties

$$widgetSubscribers$$ → Set<int>
The hashcode of all widgets subscribed to this beacon. This should not be used directly.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
initialValue → TimestampValue<T>
The initial value of the beacon.
no setterinherited
isDisposed → bool
Returns true if the beacon has been disposed.
no setterinherited
isEmpty → bool
Returns true if the beacon has not been initialized.
no setterinherited
listenersCount → int
The number of listeners subscribed to this beacon.
no setterinherited
name → String
The name of the beacon. For debugging purposes.
no setterinherited
previousValue → TimestampValue<T>?
The previous value of the beacon.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
stream → Stream<TimestampValue<T>>
Returns a broadcast Stream that emits the current value and all subsequent updates to the value of this beacon.
no setterinherited
value → TimestampValue<T>
Returns the current value and subscribes to changes in the beacon when used within a Beacon.effect or Beacon.derived.
no setterinherited

Methods

call() → TimestampValue<T>
Equivalent to calling value getter.
inherited
dispose() → void
Clears all registered listeners and resouces used by the beacon. You will not be able to update or subscribe to the beacon after it has been disposed.
inherited
guard() → void
Prevents the beacon from being disposed by its dependants. The beacon will still be disposed if its dependencies are disposed.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
onDispose(VoidCallback callback) → VoidCallback
Registers a callback to be called when the beacon is disposed. Returns a function that can be called to remove the callback.
inherited
peek() → TimestampValue<T>
Return the current value of the beacon without subscribing to it.
inherited
set(T newValue) → void
Set the value of this beacon.
subscribe(void callback(TimestampValue<T>), {bool startNow = true, bool synchronous = false}) → VoidCallback
Subscribes to changes in the beacon returns a function that can be called to unsubscribe
inherited
toStream({bool synchronous = false}) → Stream<TimestampValue<T>>
Returns a broadcast Stream that emits the current value and all subsequent updates to the value of this beacon. If synchronous is true, autobatching will be disabled and all updates will be emitted immediately.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited