ChangeNotifier class
A class that can be extended or mixed in that provides a change notification API using VoidCallback for notifications.
ChangeNotifier is optimized for small numbers (one or two) of listeners. It is O(N) for adding and removing listeners and O(N²) for 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
- hasListeners → bool
-
Whether any listeners are currently registered. [...]
@protected, read-only
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
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 and removeListener will throw after the object is
disposed). [...]
@mustCallSuper
-
notifyListeners(
) → void -
Call all the registered listeners. [...]
@protected
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes. [...]
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
inherited
-
toString(
) → String -
Returns a string representation of this object.
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited