evented_bloc 0.0.2

An extension to the bloc state management library which adds support for firing outgoing events from blocs to external listeners.

Evented Bloc

An extension to the bloc state management library which adds support for firing outgoing events from blocs to external listeners.

This package is built to work with:

• flutter_evented_bloc
• bloc_test

Quick Start 🚀

// The event triggered by my BLoC component.
@immutable
class CounterEvent {
  const CounterEvent.incremented() : message = 'Incremented';
  const CounterEvent.decremented() : message = 'Decremented';

  final String message;
}

// Extend `EventedCubit` instead of `Cubit`, or extend standard `Cubit`
// with `EventedMixin<Event, State>`.
// The package also exports: `EventedBloc`
class CounterCubit extends EventedCubit<CounterEvent, int> {
  CounterCubit() : super(0);

  void increment() {
    emit(state + 1);
    // Fire 'IncrementedEvent' through the event stream
    fireEvent(const CounterEvent.incremented());
  }

  void decrement() {
    emit(state - 1);
    // Fire 'DecrementedEvent' through the event stream
    fireEvent(const CounterEvent.decremented());
  }
}

void main() async {
  // Create an instance of the cubit.
  final cubit = CounterCubit();

  // Subscribe the event stream channel.
  final subscription = cubit.eventStream.listen((event) {
    print(event); // 'Incremented'!!
  });

  // Increment
  cubit.increment();
  await Future.delayed(Duration.zero);

  // Dispose
  await subscription.cancel();
  await cubit.close();
}