Added haptics

added `HapticsService`

added haptics handling

added `HapticsInteractor`

lib/application.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
+import 'package:lightmeter/data/haptics_service.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -29,6 +30,7 @@ class Application extends StatelessWidget {
           return MultiProvider(
             providers: [
               Provider(create: (_) => UserPreferencesService(snapshot.data!)),
+              Provider(create: (_) => HapticsService()),
               Provider.value(value: evSource),
             ],
             child: Provider(

lib/data/haptics_service.dart

@@ -0,0 +1,18 @@
+import 'package:vibration/vibration.dart';
+
+class HapticsService {
+  Future<void> quickVibration() async => _tryVibrate(duration: 25, amplitude: 96);
+
+  Future<void> responseVibration() async => _tryVibrate(duration: 50, amplitude: 128);
+
+  Future<void> _tryVibrate({required int duration, required int amplitude}) async {
+    if (await _canVibrate()) {
+      Vibration.vibrate(
+        duration: duration,
+        amplitude: amplitude,
+      );
+    }
+  }
+
+  Future<bool> _canVibrate() async => await Vibration.hasVibrator() ?? false;
+}

lib/data/shared_prefs_service.dart

@@ -5,10 +5,11 @@ import 'models/photography_values/nd_value.dart';
 import 'models/theme_type.dart';
 
 class UserPreferencesService {
-  static const _isoKey = "ISO";
-  static const _ndFilterKey = "ND";
+  static const _isoKey = "iso";
+  static const _ndFilterKey = "nd";
 
-  static const _themeTypeKey = "ThemeType";
+  static const _hapticsKey = "haptics";
+  static const _themeTypeKey = "themeType";
 
   final SharedPreferences _sharedPreferences;
 
@@ -20,6 +21,9 @@ class UserPreferencesService {
   NdValue get ndFilter => ndValues.firstWhere((v) => v.value == (_sharedPreferences.getInt(_ndFilterKey) ?? 0));
   set ndFilter(NdValue value) => _sharedPreferences.setInt(_ndFilterKey, value.value);
 
+  bool get haptics => _sharedPreferences.getBool(_hapticsKey) ?? false;
+  set haptics(bool value) => _sharedPreferences.setBool(_hapticsKey, value);
+
   ThemeType get themeType => ThemeType.values[_sharedPreferences.getInt(_themeTypeKey) ?? 0];
   set themeType(ThemeType value) => _sharedPreferences.setInt(_themeTypeKey, value.index);
 }

lib/interactors/haptics_interactor.dart

@@ -0,0 +1,26 @@
+import 'package:lightmeter/data/haptics_service.dart';
+import 'package:lightmeter/data/shared_prefs_service.dart';
+
+class HapticsInteractor {
+  final UserPreferencesService _userPreferencesService;
+  final HapticsService _hapticsService;
+
+  const HapticsInteractor(
+    this._userPreferencesService,
+    this._hapticsService,
+  );
+
+  bool get isEnabled => _userPreferencesService.haptics;
+
+  /// Executes vibration if haptics are enabled in settings
+  void quickVibration() {
+    if (_userPreferencesService.haptics) _hapticsService.quickVibration();
+  }
+
+  /// Executes vibration if haptics are enabled in settings
+  void responseVibration() {
+    if (_userPreferencesService.haptics) _hapticsService.responseVibration();
+  }
+
+  void enableHaptics(bool enable) => _userPreferencesService.haptics = enable;
+}

lib/l10n/intl_en.arb

@@ -17,6 +17,7 @@
     "showFractionalStops": "Show fractional stops",
     "halfStops": "1/2",
     "thirdStops": "1/3",
+    "haptics": "Haptics",
     "theme": "Theme",
     "chooseTheme": "Choose theme",
     "themeLight": "Light",

lib/screens/metering/bloc_metering.dart

@@ -7,6 +7,7 @@ import 'package:lightmeter/data/models/exposure_pair.dart';
 import 'package:lightmeter/data/models/photography_values/photography_value.dart';
 import 'package:lightmeter/data/models/photography_values/shutter_speed_value.dart';
 import 'package:lightmeter/data/shared_prefs_service.dart';
+import 'package:lightmeter/interactors/haptics_interactor.dart';
 import 'package:lightmeter/screens/metering/communication/event_communication_metering.dart' as communication_events;
 import 'package:lightmeter/screens/metering/communication/state_communication_metering.dart' as communication_states;
 import 'package:lightmeter/utils/log_2.dart';
@@ -18,6 +19,7 @@ import 'state_metering.dart';
 class MeteringBloc extends Bloc<MeteringEvent, MeteringState> {
   final MeteringCommunicationBloc _communicationBloc;
   final UserPreferencesService _userPreferencesService;
+  final HapticsInteractor _hapticsInteractor;
   late final StreamSubscription<communication_states.ScreenState> _communicationSubscription;
 
   List<ApertureValue> get _apertureValues => apertureValues.whereStopType(stopType);
@@ -28,6 +30,7 @@ class MeteringBloc extends Bloc<MeteringEvent, MeteringState> {
   MeteringBloc(
     this._communicationBloc,
     this._userPreferencesService,
+    this._hapticsInteractor,
     this.stopType,
   ) : super(
           MeteringState(
@@ -46,7 +49,7 @@ class MeteringBloc extends Bloc<MeteringEvent, MeteringState> {
     on<StopTypeChangedEvent>(_onStopTypeChanged);
     on<IsoChangedEvent>(_onIsoChanged);
     on<NdChangedEvent>(_onNdChanged);
-    on<MeasureEvent>((_, __) => _communicationBloc.add(const communication_events.MeasureEvent()));
+    on<MeasureEvent>(_onMeasure);
     on<MeasuredEvent>(_onMeasured);
 
     add(const MeasureEvent());
@@ -99,7 +102,13 @@ class MeteringBloc extends Bloc<MeteringEvent, MeteringState> {
     ));
   }
 
+  void _onMeasure(_, __) {
+    _hapticsInteractor.quickVibration();
+    _communicationBloc.add(const communication_events.MeasureEvent());
+  }
+
   void _onMeasured(MeasuredEvent event, Emitter emit) {
+    _hapticsInteractor.responseVibration();
     final ev = event.ev100 + log2(state.iso.value / 100);
     emit(MeteringState(
       iso: state.iso,

lib/screens/metering/components/camera/widget_exposure_slider.dart

@@ -21,7 +21,7 @@ class CameraExposureSlider extends StatelessWidget {
               IconButton(
                 icon: const Icon(Icons.sync),
                 onPressed: state.currentExposureOffset != 0.0
-                    ? () => context.read<CameraBloc>().add(const ExposureOffsetChangedEvent(0))
+                    ? () => context.read<CameraBloc>().add(const ExposureOffsetResetEvent())
                     : null,
               ),
               Expanded(

lib/screens/metering/ev_source/camera/bloc_camera.dart

@@ -6,6 +6,7 @@ import 'package:camera/camera.dart';
 import 'package:exif/exif.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/interactors/haptics_interactor.dart';
 import 'package:lightmeter/screens/metering/ev_source/ev_source_bloc.dart';
 import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
 import 'package:lightmeter/screens/metering/communication/event_communication_metering.dart' as communication_event;
@@ -16,6 +17,7 @@ import 'event_camera.dart';
 import 'state_camera.dart';
 
 class CameraBloc extends EvSourceBloc<CameraEvent, CameraState> {
+  final HapticsInteractor _hapticsInteractor;
   late final _WidgetsBindingObserver _observer;
   CameraController? _cameraController;
   CameraController? get cameraController => _cameraController;
@@ -29,8 +31,10 @@ class CameraBloc extends EvSourceBloc<CameraEvent, CameraState> {
   double _exposureStep = 0.0;
   double _currentExposureOffset = 0.0;
 
-  CameraBloc(MeteringCommunicationBloc communicationBloc)
-      : super(
+  CameraBloc(
+    MeteringCommunicationBloc communicationBloc,
+    this._hapticsInteractor,
+  ) : super(
           communicationBloc,
           const CameraInitState(),
         ) {
@@ -40,6 +44,7 @@ class CameraBloc extends EvSourceBloc<CameraEvent, CameraState> {
     on<InitializeEvent>(_onInitialize);
     on<ZoomChangedEvent>(_onZoomChanged);
     on<ExposureOffsetChangedEvent>(_onExposureOffsetChanged);
+    on<ExposureOffsetResetEvent>(_onExposureOffsetResetEvent);
 
     add(const InitializeEvent());
   }
@@ -117,6 +122,11 @@ class CameraBloc extends EvSourceBloc<CameraEvent, CameraState> {
     _emitActiveState(emit);
   }
 
+  Future<void> _onExposureOffsetResetEvent(ExposureOffsetResetEvent event, Emitter emit) async {
+    _hapticsInteractor.quickVibration();
+    add(const ExposureOffsetChangedEvent(0));
+  }
+
   void _emitActiveState(Emitter emit) {
     emit(CameraActiveState(
       minZoom: _zoomRange!.start,

lib/screens/metering/ev_source/camera/event_camera.dart

@@ -17,3 +17,7 @@ class ExposureOffsetChangedEvent extends CameraEvent {
 
   const ExposureOffsetChangedEvent(this.value);
 }
+
+class ExposureOffsetResetEvent extends CameraEvent {
+  const ExposureOffsetResetEvent();
+}

lib/screens/metering/flow_metering.dart

@@ -1,14 +1,16 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/data/haptics_service.dart';
 import 'package:lightmeter/data/models/ev_source_type.dart';
 import 'package:lightmeter/data/models/photography_values/photography_value.dart';
 import 'package:lightmeter/data/shared_prefs_service.dart';
+import 'package:lightmeter/interactors/haptics_interactor.dart';
+import 'package:provider/provider.dart';
 
 import 'ev_source/camera/bloc_camera.dart';
 import 'ev_source/random_ev/bloc_random_ev.dart';
 import 'bloc_metering.dart';
 import 'communication/bloc_communication_metering.dart';
-
 import 'screen_metering.dart';
 
 class MeteringFlow extends StatelessWidget {
@@ -16,24 +18,36 @@ class MeteringFlow extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return MultiBlocProvider(
-      providers: [
-        BlocProvider(create: (_) => MeteringCommunicationBloc()),
-        BlocProvider(
-          create: (context) => MeteringBloc(
-            context.read<MeteringCommunicationBloc>(),
-            context.read<UserPreferencesService>(),
-            context.read<StopType>(),
-          ),
-        ),
-        BlocProvider(create: (context) => CameraBloc(context.read<MeteringCommunicationBloc>())),
-        if (context.read<EvSourceType>() == EvSourceType.mock)
+    return Provider(
+      create: (context) => HapticsInteractor(
+        context.read<UserPreferencesService>(),
+        context.read<HapticsService>(),
+      ),
+      child: MultiBlocProvider(
+        providers: [
+          BlocProvider(create: (_) => MeteringCommunicationBloc()),
           BlocProvider(
-            lazy: false,
-            create: (context) => RandomEvBloc(context.read<MeteringCommunicationBloc>()),
+            create: (context) => MeteringBloc(
+              context.read<MeteringCommunicationBloc>(),
+              context.read<UserPreferencesService>(),
+              context.read<HapticsInteractor>(),
+              context.read<StopType>(),
+            ),
           ),
-      ],
-      child: const MeteringScreen(),
+          BlocProvider(
+            create: (context) => CameraBloc(
+              context.read<MeteringCommunicationBloc>(),
+              context.read<HapticsInteractor>(),
+            ),
+          ),
+          if (context.read<EvSourceType>() == EvSourceType.mock)
+            BlocProvider(
+              lazy: false,
+              create: (context) => RandomEvBloc(context.read<MeteringCommunicationBloc>()),
+            ),
+        ],
+        child: const MeteringScreen(),
+      ),
     );
   }
 }

lib/screens/settings/components/haptics/bloc_list_tile_haptics.dart

@@ -0,0 +1,18 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/interactors/haptics_interactor.dart';
+
+class HapticsListTileBloc extends Cubit<bool> {
+  final HapticsInteractor _hapticsInteractor;
+
+  HapticsListTileBloc(
+    this._hapticsInteractor,
+  ) : super(_hapticsInteractor.isEnabled);
+
+  void onHapticsChange(bool value) {
+    _hapticsInteractor.enableHaptics(value);
+    if (value) {
+      _hapticsInteractor.quickVibration();
+    }
+    emit(value);
+  }
+}

lib/screens/settings/components/haptics/provider_list_tile_haptics.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/data/haptics_service.dart';
+import 'package:lightmeter/data/shared_prefs_service.dart';
+import 'package:lightmeter/interactors/haptics_interactor.dart';
+import 'package:provider/provider.dart';
+
+import 'bloc_list_tile_haptics.dart';
+import 'widget_list_tile_haptics.dart';
+
+class HapticsListTileProvider extends StatelessWidget {
+  const HapticsListTileProvider({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Provider(
+      create: (context) => HapticsInteractor(
+        context.read<UserPreferencesService>(),
+        context.read<HapticsService>(),
+      ),
+      child: BlocProvider(
+        create: (context) => HapticsListTileBloc(
+          context.read<HapticsInteractor>()
+        ),
+        child: const HapticsListTile(),
+      ),
+    );
+  }
+}

lib/screens/settings/components/haptics/widget_list_tile_haptics.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/generated/l10n.dart';
+
+import 'bloc_list_tile_haptics.dart';
+
+class HapticsListTile extends StatelessWidget {
+  const HapticsListTile({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocBuilder<HapticsListTileBloc, bool>(
+      builder: (context, state) => SwitchListTile(
+        secondary: const Icon(Icons.vibration),
+        title: Text(S.of(context).haptics),
+        value: state,
+        onChanged: context.read<HapticsListTileBloc>().onHapticsChange,
+      ),
+    );
+  }
+}

lib/screens/settings/screen_settings.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
 import 'package:lightmeter/res/dimens.dart';
 
+import 'components/haptics/provider_list_tile_haptics.dart';
 import 'components/widget_list_tile_fractional_stops.dart';
 import 'components/widget_list_tile_theme_type.dart';
 import 'components/widget_label_version.dart';
@@ -40,8 +41,7 @@ class SettingsScreen extends StatelessWidget {
               delegate: SliverChildListDelegate(
                 [
                   const StopTypeListTile(),
-                  // const CaffeineListTile(),
-                  // const HapticsListTile(),
+                  const HapticsListTileProvider(),
                   const ThemeTypeListTile(),
                 ],
               ),

pubspec.yaml

@@ -11,26 +11,27 @@ dependencies:
   exif: 3.1.2
   flutter:
     sdk: flutter
-  flutter_bloc: ^8.1.1
+  flutter_bloc: 8.1.1
   flutter_localizations:
     sdk: flutter
   intl: 0.17.0
   intl_utils: 2.8.1
-  material_color_utilities: ^0.2.0
+  material_color_utilities: 0.2.0
   package_info_plus: 3.0.2
   permission_handler: 10.2.0
-  provider: ^6.0.4
+  provider: 6.0.4
   shared_preferences: 2.0.15
+  vibration: 1.7.6
 
 dev_dependencies:
-  google_fonts: ^3.0.1
+  google_fonts: 3.0.1
   flutter_launcher_icons: 0.11.0
-  flutter_lints: ^2.0.0
+  flutter_lints: 2.0.0
   flutter_native_splash: 2.2.16
-  test: ^1.21.6
+  test: 1.21.6
 
 dependency_overrides:
-  material_color_utilities: ^0.2.0
+  material_color_utilities: 0.2.0
 
 flutter:
   uses-material-design: true