ChangeNotifier class
A class that can be extended or mixed in that provides a change notification API using VoidCallback for notifications.
It is O(1) for adding listeners and O(N) for removing listeners and dispatching notifications (where N is the number of listeners).
See also:
- ValueNotifier, which is a ChangeNotifier that wraps a single value.
- Implemented types
- Implementers
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
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).
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void - Call all the registered listeners.
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
override
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited