mapEventToState method

  1. @override
Stream<FastDeviceOrientationBlocState> mapEventToState(
  1. FastDeviceOrientationBlocEvent event
)
override

Must be implemented when a class extends BidirectionalBloc. mapEventToState is called whenever an event is added and will convert that event into a new BloC state. It can yield zero, one or several states for an event.

Implementation

@override
Stream<FastDeviceOrientationBlocState> mapEventToState(
  FastDeviceOrientationBlocEvent event,
) async* {
  if (event.type == FastDeviceOrientationBlocEventType.changed) {
    final orientation = event.payload as Orientation;

    if (orientation != currentState.orientation) {
      _logger.debug('Device orientation changed to ${orientation.name}');

      yield currentState.copyWith(orientation: orientation);
    }
  }
}