ValueStreamController<T> class

A ValueStreamController is a StreamController that emits the last emitted value to any listener when the listener first subscribes to the Stream.

Implemented types

Constructors

ValueStreamController({T? initialValue, bool initiallyNull = false})
Create a new ValueStreamController with an optional initial value.

Properties

done Future
A future which is completed when the stream controller is done sending events.
no setteroverride
hashCode int
The hash code for this object.
no setterinherited
hasListener bool
Whether there is a subscriber on the Stream.
no setteroverride
isClosed bool
Whether the stream controller is closed for adding more events.
no setteroverride
isPaused bool
Whether the subscription would need to buffer events.
no setteroverride
onCancel ↔ void Function()?
The callback which is called when the stream is canceled.
getter/setter pairoverride
onListen ↔ void Function()?
The callback which is called when the stream is listened to.
getter/setter pairoverride
onPause ↔ void Function()?
The callback which is called when the stream is paused.
getter/setter pairoverride
onResume ↔ void Function()?
The callback which is called when the stream is resumed.
getter/setter pairoverride
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
sink StreamSink<T>
Returns a view of this object that only exposes the StreamSink interface.
no setteroverride
stream Stream<T>
The stream that this controller is controlling.
no setteroverride
value → T?
The last emitted value.
no setter

Methods

add(T value) → void
Add a new value to the ValueStreamController.
override
addError(Object error, [StackTrace? stackTrace]) → void
Sends or enqueues an error event.
override
addStream(Stream<T> source, {bool? cancelOnError}) Future
Receives events from source and puts them into this controller's stream.
override
close() Future
Closes the stream.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() String
A string representation of this object.
inherited

Operators

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