mirror of
https://github.com/vodemn/m3_lightmeter.git
synced 2024-10-19 06:40:59 +00:00
62 lines
2.3 KiB
Dart
62 lines
2.3 KiB
Dart
import 'dart:async';
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:lightmeter/interactors/metering_interactor.dart';
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import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
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import 'package:lightmeter/screens/metering/communication/event_communication_metering.dart'
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as communication_event;
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import 'package:lightmeter/screens/metering/communication/state_communication_metering.dart'
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as communication_states;
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import 'package:lightmeter/screens/metering/components/light_sensor_container/event_container_light_sensor.dart';
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import 'package:lightmeter/screens/metering/components/light_sensor_container/state_container_light_sensor.dart';
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import 'package:lightmeter/screens/metering/components/shared/ev_source_base/bloc_base_ev_source.dart';
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import 'package:lightmeter/utils/log_2.dart';
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class LightSensorContainerBloc
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extends EvSourceBlocBase<LightSensorContainerEvent, LightSensorContainerState> {
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final MeteringInteractor _meteringInteractor;
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StreamSubscription<int>? _luxSubscriptions;
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LightSensorContainerBloc(
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this._meteringInteractor,
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MeteringCommunicationBloc communicationBloc,
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) : super(
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communicationBloc,
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const LightSensorContainerState(null),
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) {
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on<LuxMeteringEvent>(_onLuxMeteringEvent);
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}
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@override
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void onCommunicationState(communication_states.SourceState communicationState) {
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if (communicationState is communication_states.MeasureState) {
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if (_luxSubscriptions == null) {
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_startMetering();
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} else {
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_cancelMetering();
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}
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}
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}
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@override
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Future<void> close() async {
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_cancelMetering();
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return super.close();
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}
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void _onLuxMeteringEvent(LuxMeteringEvent event, Emitter<LightSensorContainerState> emit) {
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final ev100 = log2(event.lux.toDouble() / 2.5) + _meteringInteractor.lightSensorEvCalibration;
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emit(LightSensorContainerState(ev100));
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communicationBloc.add(communication_event.MeteringInProgressEvent(ev100));
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}
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void _startMetering() {
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_luxSubscriptions = _meteringInteractor.luxStream().listen((lux) => add(LuxMeteringEvent(lux)));
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}
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void _cancelMetering() {
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communicationBloc.add(communication_event.MeteringEndedEvent(state.ev100));
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_luxSubscriptions?.cancel().then((_) => _luxSubscriptions = null);
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}
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}
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