AnimationLocalListenersMixin mixin Null safety

A mixin that implements the addListener/removeListener protocol and notifies all the registered listeners when notifyListeners is called.

This mixin requires that the mixing class provide methods didRegisterListener and didUnregisterListener. Implementations of these methods can be obtained by mixing in another mixin from this library, such as AnimationLazyListenerMixin.

Superclass Constraints
Implemented by




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


didRegisterListener() → void
Called immediately before a listener is added via addListener. [...]
didUnregisterListener() → void
Called immediately after a listener is removed via removeListener. [...]
addListener(VoidCallback listener) → void
Calls the listener every time the value of the animation changes. [...]
removeListener(VoidCallback listener) → void
Stop calling the listener every time the value of the animation changes. [...]
clearListeners() → void
Removes all listeners added with addListener. [...]
notifyListeners() → void
Calls all the listeners. [...]
toString() String
A string representation of this object. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]


operator ==(Object other) bool
The equality operator. [...]