StateNotifier<T> class
Publisher that can store a value. Whenever the value changes, all subscribers will be notified. When a listener is added, it also initiates a notification specifically for that listener.
Limitation
This publisher behaves almost the same as ValueNotifier, except that it is not required to be initialized with a value during creation. This allows you to emit the first value later, but it also makes the value nullable. If you don't need this behavior for the publisher, ValueNotifier is likely more suitable.
See also:
- Inheritance
-
- Object
- ChangeNotifier
- StateNotifier
- Implemented types
Constructors
- StateNotifier({T? initValue})
- Create an instance of StateNotifier.
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- value → T?
-
Returns current state.
no setteroverride
Methods
-
accept(
T? newValue) → void - Accept a new value.
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
override
-
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).
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
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 ==(
Object other) → bool -
The equality operator.
inherited