onTransform method

@protected @mustCallSuper void onTransform(TransformController<Event, State> transition)

Called whenever a transition occurs with the given transition. A transition occurs when a new event is added and mapEventToState executed. onTransform is called before a Controller's state has been updated. A great spot to add logging/analytics at the individual Controller level.

Note: super.onTransform should always be called first.

@override
void onTransform(Transition<Event, State> transition) {
  // Always call super.onTransform with the current transition
  super.onTransform(transition);

  // Custom onTransform logic goes here
}

See also:

• ObserverController.onTransform for observing transitions globally.

Implementation

@protected
@mustCallSuper
void onTransform(TransformController<Event, State> transition) {
  // ignore: invalid_use_of_protected_member
  Controller.observer.onTransform(this, transition);
}