wip

lib/application.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
+import 'package:light_sensor/light_sensor.dart';
 import 'package:lightmeter/data/haptics_service.dart';
-import 'package:lightmeter/data/models/ev_source_type.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -11,6 +11,7 @@ import 'data/permissions_service.dart';
 import 'data/shared_prefs_service.dart';
 import 'environment.dart';
 import 'generated/l10n.dart';
+import 'providers/ev_source_type_provider.dart';
 import 'res/theme.dart';
 import 'screens/metering/flow_metering.dart';
 import 'screens/settings/flow_settings.dart';
@@ -18,27 +19,35 @@ import 'utils/stop_type_provider.dart';
 
 final RouteObserver<PageRoute> routeObserver = RouteObserver<PageRoute>();
 
-class Application extends StatelessWidget {
+class Application extends StatefulWidget {
   final Environment env;
 
   const Application(this.env, {super.key});
 
+  @override
+  State<Application> createState() => _ApplicationState();
+}
+
+class _ApplicationState extends State<Application> {
   @override
   Widget build(BuildContext context) {
-    return FutureBuilder<SharedPreferences>(
+    return FutureBuilder(
-      future: SharedPreferences.getInstance(),
+      future: Future.wait([
+        SharedPreferences.getInstance(),
+        LightSensor.hasSensor,
+      ]),
       builder: (_, snapshot) {
         if (snapshot.data != null) {
           return MultiProvider(
             providers: [
-              Provider.value(value: env),
+              Provider.value(value: widget.env.copyWith(hasLightSensor: snapshot.data![1] as bool)),
-              Provider.value(value: EvSourceType.camera),
+              Provider(create: (_) => UserPreferencesService(snapshot.data![0] as SharedPreferences)),
-              Provider(create: (_) => UserPreferencesService(snapshot.data!)),
               Provider(create: (_) => const HapticsService()),
               Provider(create: (_) => PermissionsService()),
               Provider(create: (_) => const LightSensorService()),
             ],
             child: StopTypeProvider(
+              child: EvSourceTypeProvider(
                 child: ThemeProvider(
                   builder: (context, _) {
                     final systemIconsBrightness = ThemeData.estimateBrightnessForColor(
@@ -77,6 +86,7 @@ class Application extends StatelessWidget {
                   },
                 ),
               ),
+            ),
           );
         }
         return const SizedBox();

lib/data/shared_prefs_service.dart

@@ -1,13 +1,15 @@
 import 'package:shared_preferences/shared_preferences.dart';
 
+import 'models/ev_source_type.dart';
 import 'models/photography_values/iso_value.dart';
 import 'models/photography_values/nd_value.dart';
 import 'models/theme_type.dart';
 
 class UserPreferencesService {
   static const _isoKey = "iso";
-  static const _ndFilterKey = "nd";
+  static const _ndFilterKey = "ndFilter";
 
+  static const _evSourceTypeKey = "evSourceType";
   static const _cameraEvCalibrationKey = "cameraEvCalibration";
 
   static const _hapticsKey = "haptics";
@@ -24,6 +26,9 @@ class UserPreferencesService {
   NdValue get ndFilter => ndValues.firstWhere((v) => v.value == (_sharedPreferences.getInt(_ndFilterKey) ?? 0));
   set ndFilter(NdValue value) => _sharedPreferences.setInt(_ndFilterKey, value.value);
 
+  EvSourceType get evSourceType => EvSourceType.values[_sharedPreferences.getInt(_evSourceTypeKey) ?? 0];
+  set evSourceType(EvSourceType value) => _sharedPreferences.setInt(_evSourceTypeKey, value.index);
+
   bool get haptics => _sharedPreferences.getBool(_hapticsKey) ?? false;
   set haptics(bool value) => _sharedPreferences.setBool(_hapticsKey, value);
 

lib/environment.dart

@@ -3,19 +3,31 @@ class Environment {
   final String issuesReportUrl;
   final String contactEmail;
 
+  final bool hasLightSensor;
+
   const Environment({
     required this.sourceCodeUrl,
     required this.issuesReportUrl,
     required this.contactEmail,
+    this.hasLightSensor = false,
   });
 
   const Environment.dev()
       : sourceCodeUrl = 'https://github.com/vodemn/m3_lightmeter',
         issuesReportUrl = 'https://github.com/vodemn/m3_lightmeter/issues',
-        contactEmail = 'contact.vodemn@gmail.com';
+        contactEmail = 'contact.vodemn@gmail.com',
+        hasLightSensor = false;
 
   const Environment.prod()
       : sourceCodeUrl = 'https://github.com/vodemn/m3_lightmeter',
         issuesReportUrl = 'https://github.com/vodemn/m3_lightmeter/issues',
-        contactEmail = 'contact.vodemn@gmail.com';
+        contactEmail = 'contact.vodemn@gmail.com',
+        hasLightSensor = false;
+
+  Environment copyWith({bool? hasLightSensor}) => Environment(
+        sourceCodeUrl: sourceCodeUrl,
+        issuesReportUrl: issuesReportUrl,
+        contactEmail: contactEmail,
+        hasLightSensor: hasLightSensor ?? this.hasLightSensor,
+      );
 }

lib/providers/ev_source_type_provider.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/data/models/ev_source_type.dart';
+import 'package:lightmeter/data/shared_prefs_service.dart';
+import 'package:lightmeter/environment.dart';
+import 'package:provider/provider.dart';
+
+class EvSourceTypeProvider extends StatefulWidget {
+  final Widget child;
+
+  const EvSourceTypeProvider({required this.child, super.key});
+
+  static EvSourceTypeProviderState of(BuildContext context) {
+    return context.findAncestorStateOfType<EvSourceTypeProviderState>()!;
+  }
+
+  @override
+  State<EvSourceTypeProvider> createState() => EvSourceTypeProviderState();
+}
+
+class EvSourceTypeProviderState extends State<EvSourceTypeProvider> {
+  late final ValueNotifier<EvSourceType> valueListenable;
+
+  @override
+  void initState() {
+    super.initState();
+    final evSourceType = context.read<UserPreferencesService>().evSourceType;
+    valueListenable = ValueNotifier(
+      evSourceType == EvSourceType.sensor && !context.read<Environment>().hasLightSensor
+          ? EvSourceType.camera
+          : evSourceType,
+    );
+  }
+
+  @override
+  void dispose() {
+    valueListenable.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ValueListenableBuilder(
+      valueListenable: valueListenable,
+      builder: (_, value, child) => Provider.value(
+        value: value,
+        child: child,
+      ),
+      child: widget.child,
+    );
+  }
+
+  void toggleType() {
+    switch (valueListenable.value) {
+      case EvSourceType.camera:
+        if (context.read<Environment>().hasLightSensor) {
+          valueListenable.value = EvSourceType.sensor;
+        }
+        break;
+      case EvSourceType.sensor:
+        valueListenable.value = EvSourceType.camera;
+        break;
+    }
+  }
+}

lib/screens/metering/components/bottom_controls/widget_bottom_controls.dart

@@ -5,10 +5,12 @@ import 'components/widget_button_measure.dart';
 import 'components/widget_button_secondary.dart';
 
 class MeteringBottomControls extends StatelessWidget {
+  final VoidCallback? onSwitchEvSourceType;
   final VoidCallback onMeasure;
   final VoidCallback onSettings;
 
   const MeteringBottomControls({
+    required this.onSwitchEvSourceType,
     required this.onMeasure,
     required this.onSettings,
     super.key,
@@ -30,6 +32,14 @@ class MeteringBottomControls extends StatelessWidget {
             child: Row(
               mainAxisAlignment: MainAxisAlignment.spaceEvenly,
               children: [
+                if (onSwitchEvSourceType != null)
+                  Expanded(
+                    child: MeteringSecondaryButton(
+                      onPressed: onSwitchEvSourceType!,
+                      icon: Icons.sync,
+                    ),
+                  )
+                else
                   const Spacer(),
                 MeteringMeasureButton(
                   onTap: onMeasure,

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

@@ -7,7 +7,7 @@ import 'package:exif/exif.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:lightmeter/interactors/metering_interactor.dart';
-import 'package:lightmeter/screens/metering/ev_source/bloc_base_ev_source.dart';
+import 'package:lightmeter/screens/metering/components/shared/ev_source_base/bloc_base_ev_source.dart';
 import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
 import 'package:lightmeter/screens/metering/communication/event_communication_metering.dart'
     as communication_event;
@@ -15,10 +15,10 @@ import 'package:lightmeter/screens/metering/communication/state_communication_me
     as communication_states;
 import 'package:lightmeter/utils/log_2.dart';
 
-import 'event_camera.dart';
+import 'event_container_camera.dart';
-import 'state_camera.dart';
+import 'state_container_camera.dart';
 
-class CameraBloc extends EvSourceBlocBase<CameraEvent, CameraState> {
+class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraContainerState> {
   final MeteringInteractor _meteringInteractor;
   late final _WidgetsBindingObserver _observer;
   CameraController? _cameraController;
@@ -33,7 +33,7 @@ class CameraBloc extends EvSourceBlocBase<CameraEvent, CameraState> {
   double _exposureStep = 0.0;
   double _currentExposureOffset = 0.0;
 
-  CameraBloc(
+  CameraContainerBloc(
     MeteringCommunicationBloc communicationBloc,
     this._meteringInteractor,
   ) : super(
@@ -139,11 +139,9 @@ class CameraBloc extends EvSourceBlocBase<CameraEvent, CameraState> {
 
   void _emitActiveState(Emitter emit) {
     emit(CameraActiveState(
-      minZoom: _zoomRange!.start,
+      zoomRange: _zoomRange!,
-      maxZoom: _zoomRange!.end,
       currentZoom: _currentZoom,
-      minExposureOffset: _exposureOffsetRange!.start,
+      exposureOffsetRange: _exposureOffsetRange!,
-      maxExposureOffset: _exposureOffsetRange!.end,
       exposureOffsetStep: _exposureStep,
       currentExposureOffset: _currentExposureOffset,
     ));

lib/screens/metering/components/camera/components/camera_controls/components/exposure_offset_slider/widget_slider_exposure_offset.dart

@@ -0,0 +1,91 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/shared/centered_slider/widget_slider_centered.dart';
+import 'package:lightmeter/utils/to_string_signed.dart';
+
+class ExposureOffsetSlider extends StatelessWidget {
+  final RangeValues range;
+  final double value;
+  final ValueChanged<double> onChanged;
+
+  const ExposureOffsetSlider({
+    required this.range,
+    required this.value,
+    required this.onChanged,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        IconButton(
+          icon: const Icon(Icons.sync),
+          onPressed: value != 0.0 ? () => onChanged(0.0) : null,
+        ),
+        Expanded(
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Padding(
+                padding: const EdgeInsets.symmetric(vertical: Dimens.grid8),
+                child: _Ruler(
+                  range.start,
+                  range.end,
+                ),
+              ),
+              CenteredSlider(
+                isVertical: true,
+                icon: const Icon(Icons.light_mode),
+                value: value,
+                min: range.start,
+                max: range.end,
+                onChanged: onChanged,
+              ),
+            ],
+          ),
+        ),
+      ],
+    );
+  }
+}
+
+class _Ruler extends StatelessWidget {
+  final double min;
+  final double max;
+
+  const _Ruler(this.min, this.max);
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.end,
+      mainAxisAlignment: MainAxisAlignment.spaceBetween,
+      children: List.generate(
+        (max - min + 1).toInt(),
+        (index) {
+          final bool showValue = index % 2 == 0.0 || index == 0.0;
+          return Row(
+            mainAxisAlignment: MainAxisAlignment.end,
+            children: [
+              if (showValue)
+                Text(
+                  (index + min).toStringSigned(),
+                  style: Theme.of(context).textTheme.bodyLarge,
+                ),
+              const SizedBox(width: Dimens.grid8),
+              ColoredBox(
+                color: Theme.of(context).colorScheme.onBackground,
+                child: SizedBox(
+                  height: 1,
+                  width: showValue ? Dimens.grid16 : Dimens.grid8,
+                ),
+              ),
+              const SizedBox(width: Dimens.grid8),
+            ],
+          );
+        },
+      ).reversed.toList(),
+    );
+  }
+}

lib/screens/metering/components/camera/components/camera_controls/components/zoom_slider/widget_slider_zoom.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/screens/shared/centered_slider/widget_slider_centered.dart';
+
+class ZoomSlider extends StatelessWidget {
+  final RangeValues range;
+  final double value;
+  final ValueChanged<double> onChanged;
+
+  const ZoomSlider({
+    required this.range,
+    required this.value,
+    required this.onChanged,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return CenteredSlider(
+      icon: const Icon(Icons.search),
+      value: value,
+      min: range.start,
+      max: range.end,
+      onChanged: onChanged,
+    );
+  }
+}

lib/screens/metering/components/camera/components/camera_controls/widget_camera_controls.dart

@@ -0,0 +1,46 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/res/dimens.dart';
+
+import 'components/exposure_offset_slider/widget_slider_exposure_offset.dart';
+import 'components/zoom_slider/widget_slider_zoom.dart';
+
+class CameraControls extends StatelessWidget {
+  final RangeValues exposureOffsetRange;
+  final double exposureOffsetValue;
+  final ValueChanged<double> onExposureOffsetChanged;
+
+  final RangeValues zoomRange;
+  final double zoomValue;
+  final ValueChanged<double> onZoomChanged;
+
+  const CameraControls({
+    required this.exposureOffsetRange,
+    required this.exposureOffsetValue,
+    required this.onExposureOffsetChanged,
+    required this.zoomRange,
+    required this.zoomValue,
+    required this.onZoomChanged,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Expanded(
+          child: ExposureOffsetSlider(
+            range: exposureOffsetRange,
+            value: exposureOffsetValue,
+            onChanged: onExposureOffsetChanged,
+          ),
+        ),
+        const SizedBox(height: Dimens.grid24),
+        ZoomSlider(
+          range: zoomRange,
+          value: zoomValue,
+          onChanged: onZoomChanged,
+        ),
+      ],
+    );
+  }
+}

lib/screens/metering/components/camera/components/camera_view/widget_camera_view.dart

@@ -0,0 +1,47 @@
+import 'package:camera/camera.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+class CameraView extends StatelessWidget {
+  final CameraController controller;
+
+  const CameraView({required this.controller, Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    final value = controller.value;
+    return ValueListenableBuilder<CameraValue>(
+      valueListenable: controller,
+      builder: (_, __, ___) => AspectRatio(
+        aspectRatio: _isLandscape(value) ? value.aspectRatio : (1 / value.aspectRatio),
+        child: RotatedBox(
+          quarterTurns: _getQuarterTurns(value),
+          child: controller.buildPreview(),
+        ),
+      ),
+    );
+  }
+
+  bool _isLandscape(CameraValue value) {
+    return <DeviceOrientation>[DeviceOrientation.landscapeLeft, DeviceOrientation.landscapeRight]
+        .contains(_getApplicableOrientation(value));
+  }
+
+  int _getQuarterTurns(CameraValue value) {
+    final Map<DeviceOrientation, int> turns = <DeviceOrientation, int>{
+      DeviceOrientation.portraitUp: 0,
+      DeviceOrientation.landscapeRight: 1,
+      DeviceOrientation.portraitDown: 2,
+      DeviceOrientation.landscapeLeft: 3,
+    };
+    return turns[_getApplicableOrientation(value)]!;
+  }
+
+  DeviceOrientation _getApplicableOrientation(CameraValue value) {
+    return value.isRecordingVideo
+        ? value.recordingOrientation!
+        : (value.previewPauseOrientation ??
+            value.lockedCaptureOrientation ??
+            value.deviceOrientation);
+  }
+}

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

@@ -0,0 +1,23 @@
+abstract class CameraContainerEvent {
+  const CameraContainerEvent();
+}
+
+class InitializeEvent extends CameraContainerEvent {
+  const InitializeEvent();
+}
+
+class ZoomChangedEvent extends CameraContainerEvent {
+  final double value;
+
+  const ZoomChangedEvent(this.value);
+}
+
+class ExposureOffsetChangedEvent extends CameraContainerEvent {
+  final double value;
+
+  const ExposureOffsetChangedEvent(this.value);
+}
+
+class ExposureOffsetResetEvent extends CameraContainerEvent {
+  const ExposureOffsetResetEvent();
+}

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

@@ -0,0 +1,50 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/data/models/exposure_pair.dart';
+import 'package:lightmeter/data/models/photography_values/iso_value.dart';
+import 'package:lightmeter/data/models/photography_values/nd_value.dart';
+import 'package:lightmeter/interactors/metering_interactor.dart';
+import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
+
+import 'bloc_container_camera.dart';
+import 'widget_container_camera.dart';
+
+class CameraContainerProvider extends StatelessWidget {
+  final ExposurePair? fastest;
+  final ExposurePair? slowest;
+  final IsoValue iso;
+  final NdValue nd;
+  final ValueChanged<IsoValue> onIsoChanged;
+  final ValueChanged<NdValue> onNdChanged;
+  final List<ExposurePair> exposurePairs;
+
+  const CameraContainerProvider({
+    required this.fastest,
+    required this.slowest,
+    required this.iso,
+    required this.nd,
+    required this.onIsoChanged,
+    required this.onNdChanged,
+    required this.exposurePairs,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocProvider(
+      create: (context) => CameraContainerBloc(
+        context.read<MeteringCommunicationBloc>(),
+        context.read<MeteringInteractor>(),
+      ),
+      child: CameraContainer(
+        fastest: fastest,
+        slowest: slowest,
+        iso: iso,
+        nd: nd,
+        onIsoChanged: onIsoChanged,
+        onNdChanged: onNdChanged,
+        exposurePairs: exposurePairs,
+      ),
+    );
+  }
+}

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

@@ -0,0 +1,40 @@
+import 'package:camera/camera.dart';
+import 'package:flutter/material.dart';
+
+abstract class CameraContainerState {
+  const CameraContainerState();
+}
+
+class CameraInitState extends CameraContainerState {
+  const CameraInitState();
+}
+
+class CameraLoadingState extends CameraContainerState {
+  const CameraLoadingState();
+}
+
+class CameraInitializedState extends CameraContainerState {
+  final CameraController controller;
+
+  const CameraInitializedState(this.controller);
+}
+
+class CameraActiveState extends CameraContainerState {
+  final RangeValues zoomRange;
+  final double currentZoom;
+  final RangeValues exposureOffsetRange;
+  final double? exposureOffsetStep;
+  final double currentExposureOffset;
+
+  const CameraActiveState({
+    required this.zoomRange,
+    required this.currentZoom,
+    required this.exposureOffsetRange,
+    required this.exposureOffsetStep,
+    required this.currentExposureOffset,
+  });
+}
+
+class CameraErrorState extends CameraContainerState {
+  const CameraErrorState();
+}

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

@@ -0,0 +1,108 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/data/models/exposure_pair.dart';
+import 'package:lightmeter/data/models/photography_values/iso_value.dart';
+import 'package:lightmeter/data/models/photography_values/nd_value.dart';
+import 'package:lightmeter/platform_config.dart';
+import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/metering/components/camera/components/camera_view/widget_camera_view.dart';
+import 'package:lightmeter/screens/metering/components/shared/exposure_pairs_list/widget_list_exposure_pairs.dart';
+import 'package:lightmeter/screens/metering/components/shared/metering_top_bar/widget_top_bar_metering.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/widget_container_readings.dart';
+
+import 'bloc_container_camera.dart';
+import 'components/camera_controls/widget_camera_controls.dart';
+import 'event_container_camera.dart';
+import 'state_container_camera.dart';
+
+// TODO: add stepHeight calculation based on Text
+class CameraContainer extends StatelessWidget {
+  final ExposurePair? fastest;
+  final ExposurePair? slowest;
+  final IsoValue iso;
+  final NdValue nd;
+  final ValueChanged<IsoValue> onIsoChanged;
+  final ValueChanged<NdValue> onNdChanged;
+  final List<ExposurePair> exposurePairs;
+
+  const CameraContainer({
+    required this.fastest,
+    required this.slowest,
+    required this.iso,
+    required this.nd,
+    required this.onIsoChanged,
+    required this.onNdChanged,
+    required this.exposurePairs,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        MeteringTopBar(
+          readingsContainer: ReadingsContainer(
+            fastest: fastest,
+            slowest: slowest,
+            iso: iso,
+            nd: nd,
+            onIsoChanged: onIsoChanged,
+            onNdChanged: onNdChanged,
+          ),
+        ),
+        Expanded(
+          child: Padding(
+            padding: const EdgeInsets.symmetric(horizontal: Dimens.paddingM),
+            child: ExposurePairsList(exposurePairs),
+          ),
+        ),
+      ],
+    );
+  }
+}
+
+class _CameraViewBuilder extends StatelessWidget {
+  const _CameraViewBuilder({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return AspectRatio(
+      aspectRatio: PlatformConfig.cameraPreviewAspectRatio,
+      child: Center(
+        child: BlocBuilder<CameraContainerBloc, CameraContainerState>(
+          buildWhen: (previous, current) => current is CameraInitializedState,
+          builder: (context, state) => state is CameraInitializedState
+              ? CameraView(controller: state.controller)
+              : const ColoredBox(color: Colors.black),
+        ),
+      ),
+    );
+  }
+}
+
+class _CameraControlsBuilder extends StatelessWidget {
+  const _CameraControlsBuilder();
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocBuilder<CameraContainerBloc, CameraContainerState>(
+      builder: (context, state) => AnimatedSwitcher(
+        duration: Dimens.durationS,
+        child: state is CameraActiveState
+            ? CameraControls(
+                exposureOffsetRange: state.exposureOffsetRange,
+                exposureOffsetValue: state.currentExposureOffset,
+                onExposureOffsetChanged: (value) {
+                  context.read<CameraContainerBloc>().add(ExposureOffsetChangedEvent(value));
+                },
+                zoomRange: state.zoomRange,
+                zoomValue: state.currentZoom,
+                onZoomChanged: (value) {
+                  context.read<CameraContainerBloc>().add(ZoomChangedEvent(value));
+                },
+              )
+            : const SizedBox.shrink(),
+      ),
+    );
+  }
+}

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

@@ -1,94 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:lightmeter/res/dimens.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/bloc_camera.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/event_camera.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/state_camera.dart';
-import 'package:lightmeter/screens/shared/centered_slider/widget_slider_centered.dart';
-import 'package:lightmeter/utils/to_string_signed.dart';
-
-class CameraExposureSlider extends StatelessWidget {
-  const CameraExposureSlider({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    return BlocBuilder<CameraBloc, CameraState>(
-      builder: (context, state) {
-        if (state is CameraActiveState) {
-          return Column(
-            children: [
-              IconButton(
-                icon: const Icon(Icons.sync),
-                onPressed: state.currentExposureOffset != 0.0
-                    ? () => context.read<CameraBloc>().add(const ExposureOffsetChangedEvent(0.0))
-                    : null,
-              ),
-              Expanded(
-                child: Row(
-                  mainAxisAlignment: MainAxisAlignment.center,
-                  children: [
-                    Padding(
-                      padding: const EdgeInsets.symmetric(vertical: Dimens.grid8),
-                      child: _Ruler(state.minExposureOffset, state.maxExposureOffset),
-                    ),
-                    CenteredSlider(
-                      isVertical: true,
-                      icon: const Icon(Icons.light_mode),
-                      value: state.currentExposureOffset,
-                      min: state.minExposureOffset,
-                      max: state.maxExposureOffset,
-                      onChanged: (value) {
-                        context.read<CameraBloc>().add(ExposureOffsetChangedEvent(value));
-                      },
-                    ),
-                  ],
-                ),
-              ),
-            ],
-          );
-        }
-        return const SizedBox();
-      },
-    );
-  }
-}
-
-class _Ruler extends StatelessWidget {
-  final double min;
-  final double max;
-
-  const _Ruler(this.min, this.max);
-
-  @override
-  Widget build(BuildContext context) {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.end,
-      mainAxisAlignment: MainAxisAlignment.spaceBetween,
-      children: List.generate(
-        (max - min + 1).toInt(),
-        (index) {
-          final bool showValue = index % 2 == 0.0 || index == 0.0;
-          return Row(
-            mainAxisAlignment: MainAxisAlignment.end,
-            children: [
-              if (showValue)
-                Text(
-                  (index + min).toStringSigned(),
-                  style: Theme.of(context).textTheme.bodyLarge,
-                ),
-              const SizedBox(width: Dimens.grid8),
-              ColoredBox(
-                color: Theme.of(context).colorScheme.onBackground,
-                child: SizedBox(
-                  height: 1,
-                  width: showValue ? Dimens.grid16 : Dimens.grid8,
-                ),
-              ),
-              const SizedBox(width: Dimens.grid8),
-            ],
-          );
-        },
-      ).reversed.toList(),
-    );
-  }
-}

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

@@ -1,31 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/bloc_camera.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/event_camera.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/state_camera.dart';
-
-import '../../../shared/centered_slider/widget_slider_centered.dart';
-
-class CameraZoomSlider extends StatelessWidget {
-  const CameraZoomSlider({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    return BlocBuilder<CameraBloc, CameraState>(
-      builder: (context, state) {
-        if (state is CameraActiveState) {
-          return CenteredSlider(
-            icon: const Icon(Icons.search),
-            value: state.currentZoom,
-            min: state.minZoom,
-            max: state.maxZoom,
-            onChanged: (value) {
-              context.read<CameraBloc>().add(ZoomChangedEvent(value));
-            },
-          );
-        }
-        return const SizedBox();
-      },
-    );
-  }
-}

lib/screens/metering/components/light_sensor_container/bloc_container_light_sensor.dart

@@ -1,6 +1,6 @@
 import 'dart:async';
 import 'package:lightmeter/interactors/metering_interactor.dart';
-import 'package:lightmeter/screens/metering/ev_source/bloc_base_ev_source.dart';
+import 'package:lightmeter/screens/metering/components/shared/ev_source_base/bloc_base_ev_source.dart';
 import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
 import 'package:lightmeter/screens/metering/communication/event_communication_metering.dart'
     as communication_event;
@@ -8,15 +8,16 @@ import 'package:lightmeter/screens/metering/communication/state_communication_me
     as communication_states;
 import 'package:lightmeter/utils/log_2.dart';
 
-import 'event_light_sensor.dart';
+import 'event_container_light_sensor.dart';
-import 'state_light_sensor.dart';
+import 'state_container_light_sensor.dart';
 
-class LightSensorBloc extends EvSourceBlocBase<LightSensorEvent, LightSensorState> {
+class LightSensorContainerBloc
+    extends EvSourceBlocBase<LightSensorContainerEvent, LightSensorContainerState> {
   final MeteringInteractor _meteringInteractor;
 
   StreamSubscription<int>? _luxSubscriptions;
 
-  LightSensorBloc(
+  LightSensorContainerBloc(
     MeteringCommunicationBloc communicationBloc,
     this._meteringInteractor,
   ) : super(

lib/screens/metering/components/light_sensor_container/event_container_light_sensor.dart

@@ -0,0 +1,3 @@
+abstract class LightSensorContainerEvent {
+  const LightSensorContainerEvent();
+}

lib/screens/metering/components/light_sensor_container/provider_container_light_sensor.dart

@@ -0,0 +1,50 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/data/models/exposure_pair.dart';
+import 'package:lightmeter/data/models/photography_values/iso_value.dart';
+import 'package:lightmeter/data/models/photography_values/nd_value.dart';
+import 'package:lightmeter/interactors/metering_interactor.dart';
+import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
+
+import 'bloc_container_light_sensor.dart';
+import 'widget_container_light_sensor.dart';
+
+class LightSensorContainerProvider extends StatelessWidget {
+  final ExposurePair? fastest;
+  final ExposurePair? slowest;
+  final IsoValue iso;
+  final NdValue nd;
+  final ValueChanged<IsoValue> onIsoChanged;
+  final ValueChanged<NdValue> onNdChanged;
+  final List<ExposurePair> exposurePairs;
+
+  const LightSensorContainerProvider({
+    required this.fastest,
+    required this.slowest,
+    required this.iso,
+    required this.nd,
+    required this.onIsoChanged,
+    required this.onNdChanged,
+    required this.exposurePairs,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocProvider(
+      create: (context) => LightSensorContainerBloc(
+        context.read<MeteringCommunicationBloc>(),
+        context.read<MeteringInteractor>(),
+      ),
+      child: LightSensorContainer(
+        fastest: fastest,
+        slowest: slowest,
+        iso: iso,
+        nd: nd,
+        onIsoChanged: onIsoChanged,
+        onNdChanged: onNdChanged,
+        exposurePairs: exposurePairs,
+      ),
+    );
+  }
+}

lib/screens/metering/components/light_sensor_container/state_container_light_sensor.dart

@@ -0,0 +1,7 @@
+abstract class LightSensorContainerState {
+  const LightSensorContainerState();
+}
+
+class LightSensorInitState extends LightSensorContainerState {
+  const LightSensorInitState();
+}

lib/screens/metering/components/light_sensor_container/widget_container_light_sensor.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/data/models/exposure_pair.dart';
+import 'package:lightmeter/data/models/photography_values/iso_value.dart';
+import 'package:lightmeter/data/models/photography_values/nd_value.dart';
+import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/metering/components/shared/exposure_pairs_list/widget_list_exposure_pairs.dart';
+import 'package:lightmeter/screens/metering/components/shared/metering_top_bar/widget_top_bar_metering.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/widget_container_readings.dart';
+
+class LightSensorContainer extends StatelessWidget {
+  final ExposurePair? fastest;
+  final ExposurePair? slowest;
+  final IsoValue iso;
+  final NdValue nd;
+  final ValueChanged<IsoValue> onIsoChanged;
+  final ValueChanged<NdValue> onNdChanged;
+  final List<ExposurePair> exposurePairs;
+
+  const LightSensorContainer({
+    required this.fastest,
+    required this.slowest,
+    required this.iso,
+    required this.nd,
+    required this.onIsoChanged,
+    required this.onNdChanged,
+    required this.exposurePairs,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        MeteringTopBar(
+          readingsContainer: ReadingsContainer(
+            fastest: fastest,
+            slowest: slowest,
+            iso: iso,
+            nd: nd,
+            onIsoChanged: onIsoChanged,
+            onNdChanged: onNdChanged,
+          ),
+        ),
+        Expanded(
+          child: Padding(
+            padding: const EdgeInsets.symmetric(horizontal: Dimens.paddingM),
+            child: ExposurePairsList(exposurePairs),
+          ),
+        ),
+      ],
+    );
+  }
+}

lib/screens/metering/components/shared/ev_source_base/bloc_base_ev_source.dart

@@ -1,3 +1,4 @@
+
 import 'dart:async';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';

lib/screens/metering/components/shared/exposure_pairs_list/widget_list_exposure_pairs.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:lightmeter/data/models/exposure_pair.dart';
 import 'package:lightmeter/res/dimens.dart';
 
-import 'components/widget_item_list_exposure_pairs.dart';
+import 'components/exposure_pairs_list_item/widget_item_list_exposure_pairs.dart';
 
 class ExposurePairsList extends StatelessWidget {
   final List<ExposurePair> exposurePairs;

lib/screens/metering/components/shared/metering_top_bar/shape_top_bar_metering.dart

@@ -3,7 +3,7 @@ import 'dart:math';
 import 'package:flutter/material.dart';
 import 'package:lightmeter/res/dimens.dart';
 
-class TopBarShape extends CustomPainter {
+class MeteringTopBarShape extends CustomPainter {
   final Color color;
 
   /// The appendix is on the left side
@@ -22,7 +22,7 @@ class TopBarShape extends CustomPainter {
   final double appendixHeight;
   final double appendixWidth;
 
-  TopBarShape({
+  MeteringTopBarShape({
     required this.color,
     required this.appendixHeight,
     required this.appendixWidth,
@@ -38,8 +38,8 @@ class TopBarShape extends CustomPainter {
         RRect.fromLTRBAndCorners(
           0,
           0,
-          0,
+          size.width,
-          0,
+          size.height,
           bottomLeft: circularRadius,
           bottomRight: circularRadius,
         ),

lib/screens/metering/components/shared/metering_top_bar/widget_top_bar_metering.dart

@@ -0,0 +1,56 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/widget_container_readings.dart';
+
+import 'shape_top_bar_metering.dart';
+
+class MeteringTopBar extends StatelessWidget {
+  final ReadingsContainer readingsContainer;
+  final double appendixHeight;
+  final Widget? preview;
+
+  const MeteringTopBar({
+    required this.readingsContainer,
+    this.preview,
+    this.appendixHeight = 0.0,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return CustomPaint(
+      painter: MeteringTopBarShape(
+        color: Theme.of(context).colorScheme.surface,
+        appendixWidth: appendixHeight > 0
+            ? MediaQuery.of(context).size.width / 2 - Dimens.grid8 + Dimens.paddingM
+            : MediaQuery.of(context).size.width / 2 + Dimens.grid8 - Dimens.paddingM,
+        appendixHeight: appendixHeight,
+      ),
+      child: Padding(
+        padding: const EdgeInsets.all(Dimens.paddingM),
+        child: SafeArea(
+          bottom: false,
+          child: MediaQuery(
+            data: MediaQuery.of(context),
+            child: Row(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Expanded(child: readingsContainer),
+                if (preview != null) ...[
+                  const SizedBox(width: Dimens.grid8),
+                  Expanded(
+                    child: ClipRRect(
+                      borderRadius: const BorderRadius.all(Radius.circular(Dimens.borderRadiusM)),
+                      child: preview,
+                    ),
+                  ),
+                ]
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/screens/metering/components/shared/readings_container/components/animated_dialog_picker/components/photography_value_picker_dialog/widget_dialog_picker_photography_value.dart

@@ -7,7 +7,7 @@ typedef DialogPickerItemBuilder<T extends PhotographyValue> = Widget Function(Bu
 typedef DialogPickerEvDifferenceBuilder<T extends PhotographyValue> = String Function(
     T selected, T other);
 
-class MeteringScreenDialogPicker<T extends PhotographyValue> extends StatefulWidget {
+class PhotographyValuePickerDialog<T extends PhotographyValue> extends StatefulWidget {
   final String title;
   final String subtitle;
   final T initialValue;
@@ -17,7 +17,7 @@ class MeteringScreenDialogPicker<T extends PhotographyValue> extends StatefulWid
   final VoidCallback onCancel;
   final ValueChanged onSelect;
 
-  const MeteringScreenDialogPicker({
+  const PhotographyValuePickerDialog({
     required this.title,
     required this.subtitle,
     required this.initialValue,
@@ -30,11 +30,11 @@ class MeteringScreenDialogPicker<T extends PhotographyValue> extends StatefulWid
   });
 
   @override
-  State<MeteringScreenDialogPicker<T>> createState() => _MeteringScreenDialogPickerState<T>();
+  State<PhotographyValuePickerDialog<T>> createState() => _PhotographyValuePickerDialogState<T>();
 }
 
-class _MeteringScreenDialogPickerState<T extends PhotographyValue>
+class _PhotographyValuePickerDialogState<T extends PhotographyValue>
-    extends State<MeteringScreenDialogPicker<T>> {
+    extends State<PhotographyValuePickerDialog<T>> {
   late T _selectedValue = widget.initialValue;
   final _scrollController = ScrollController();
 

lib/screens/metering/components/shared/readings_container/components/animated_dialog_picker/widget_dialog_animated_picker.dart

@@ -0,0 +1,51 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/data/models/photography_values/photography_value.dart';
+
+import 'components/animated_dialog/widget_dialog_animated.dart';
+import 'components/photography_value_picker_dialog/widget_dialog_picker_photography_value.dart';
+
+class AnimatedDialogPicker<T extends PhotographyValue> extends StatelessWidget {
+  final _key = GlobalKey<AnimatedDialogState>();
+  final String title;
+  final String subtitle;
+  final T selectedValue;
+  final List<T> values;
+  final DialogPickerItemBuilder<T> itemTitleBuilder;
+  final DialogPickerEvDifferenceBuilder<T> evDifferenceBuilder;
+  final ValueChanged<T> onChanged;
+  final Widget closedChild;
+
+  AnimatedDialogPicker({
+    required this.title,
+    required this.subtitle,
+    required this.selectedValue,
+    required this.values,
+    required this.itemTitleBuilder,
+    required this.evDifferenceBuilder,
+    required this.onChanged,
+    required this.closedChild,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return AnimatedDialog(
+      key: _key,
+      closedChild: closedChild,
+      openedChild: PhotographyValuePickerDialog<T>(
+        title: title,
+        subtitle: subtitle,
+        initialValue: selectedValue,
+        values: values,
+        itemTitleBuilder: itemTitleBuilder,
+        evDifferenceBuilder: evDifferenceBuilder,
+        onCancel: () {
+          _key.currentState?.close();
+        },
+        onSelect: (value) {
+          _key.currentState?.close().then((_) => onChanged(value));
+        },
+      ),
+    );
+  }
+}

lib/screens/metering/components/shared/readings_container/widget_container_readings.dart

@@ -0,0 +1,128 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/data/models/exposure_pair.dart';
+import 'package:lightmeter/data/models/photography_values/iso_value.dart';
+import 'package:lightmeter/data/models/photography_values/nd_value.dart';
+import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/res/dimens.dart';
+
+import 'components/animated_dialog_picker/widget_dialog_animated_picker.dart';
+import 'components/reading_value_container/widget_container_reading_value.dart';
+
+/// Contains a column of fastest & slowest exposure pairs + a row of ISO and ND pickers
+class ReadingsContainer extends StatelessWidget {
+  final ExposurePair? fastest;
+  final ExposurePair? slowest;
+  final IsoValue iso;
+  final NdValue nd;
+  final ValueChanged<IsoValue> onIsoChanged;
+  final ValueChanged<NdValue> onNdChanged;
+
+  const ReadingsContainer({
+    required this.fastest,
+    required this.slowest,
+    required this.iso,
+    required this.nd,
+    required this.onIsoChanged,
+    required this.onNdChanged,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        ReadingValueContainer(
+          values: [
+            ReadingValue(
+              label: S.of(context).fastestExposurePair,
+              value: fastest != null ? fastest!.toString() : '-',
+            ),
+            ReadingValue(
+              label: S.of(context).slowestExposurePair,
+              value: fastest != null ? slowest!.toString() : '-',
+            ),
+          ],
+        ),
+        const _InnerPadding(),
+        Row(
+          children: [
+            Expanded(
+              child: _IsoValueTile(
+                value: iso,
+                onChanged: onIsoChanged,
+              ),
+            ),
+            const _InnerPadding(),
+            Expanded(
+              child: _NdValueTile(
+                value: nd,
+                onChanged: onNdChanged,
+              ),
+            ),
+          ],
+        )
+      ],
+    );
+  }
+}
+
+class _InnerPadding extends SizedBox {
+  const _InnerPadding() : super(height: Dimens.grid8, width: Dimens.grid8);
+}
+
+class _IsoValueTile extends StatelessWidget {
+  final IsoValue value;
+  final ValueChanged<IsoValue> onChanged;
+
+  const _IsoValueTile({required this.value, required this.onChanged});
+
+  @override
+  Widget build(BuildContext context) {
+    return AnimatedDialogPicker<IsoValue>(
+      title: S.of(context).iso,
+      subtitle: S.of(context).filmSpeed,
+      selectedValue: value,
+      values: isoValues,
+      itemTitleBuilder: (_, value) => Text(value.value.toString()),
+      // using ascending order, because increase in film speed rises EV
+      evDifferenceBuilder: (selected, other) => selected.toStringDifference(other),
+      onChanged: onChanged,
+      closedChild: ReadingValueContainer.singleValue(
+        value: ReadingValue(
+          label: S.of(context).iso,
+          value: value.value.toString(),
+        ),
+      ),
+    );
+  }
+}
+
+class _NdValueTile extends StatelessWidget {
+  final NdValue value;
+  final ValueChanged<NdValue> onChanged;
+
+  const _NdValueTile({required this.value, required this.onChanged});
+
+  @override
+  Widget build(BuildContext context) {
+    return AnimatedDialogPicker<NdValue>(
+      title: S.of(context).nd,
+      subtitle: S.of(context).ndFilterFactor,
+      selectedValue: value,
+      values: ndValues,
+      itemTitleBuilder: (_, value) => Text(
+        value.value == 0 ? S.of(context).none : value.value.toString(),
+      ),
+      // using descending order, because ND filter darkens image & lowers EV
+      evDifferenceBuilder: (selected, other) => other.toStringDifference(selected),
+      onChanged: onChanged,
+      closedChild: ReadingValueContainer.singleValue(
+        value: ReadingValue(
+          label: S.of(context).iso,
+          value: value.value.toString(),
+        ),
+      ),
+    );
+  }
+}

lib/screens/metering/components/topbar/components/widget_camera_preview.dart

@@ -1,62 +0,0 @@
-import 'package:camera/camera.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:lightmeter/platform_config.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/bloc_camera.dart';
-import 'package:lightmeter/screens/metering/ev_source/camera/state_camera.dart';
-
-class CameraView extends StatelessWidget {
-  const CameraView({Key? key}) : super(key: key);
-
-  @override
-  Widget build(BuildContext context) {
-    return AspectRatio(
-      aspectRatio: PlatformConfig.cameraPreviewAspectRatio,
-      child: Center(
-        child: BlocBuilder<CameraBloc, CameraState>(
-          buildWhen: (previous, current) => current is CameraInitializedState,
-          builder: (context, state) {
-            if (state is CameraInitializedState) {
-              final value = state.controller.value;
-              return ValueListenableBuilder<CameraValue>(
-                valueListenable: state.controller,
-                builder: (_, __, ___) => AspectRatio(
-                  aspectRatio: _isLandscape(value) ? value.aspectRatio : (1 / value.aspectRatio),
-                  child: RotatedBox(
-                    quarterTurns: _getQuarterTurns(value),
-                    child: state.controller.buildPreview(),
-                  ),
-                ),
-              );
-            }
-            return const ColoredBox(color: Colors.black);
-          },
-        ),
-      ),
-    );
-  }
-
-  bool _isLandscape(CameraValue value) {
-    return <DeviceOrientation>[DeviceOrientation.landscapeLeft, DeviceOrientation.landscapeRight]
-        .contains(_getApplicableOrientation(value));
-  }
-
-  int _getQuarterTurns(CameraValue value) {
-    final Map<DeviceOrientation, int> turns = <DeviceOrientation, int>{
-      DeviceOrientation.portraitUp: 0,
-      DeviceOrientation.landscapeRight: 1,
-      DeviceOrientation.portraitDown: 2,
-      DeviceOrientation.landscapeLeft: 3,
-    };
-    return turns[_getApplicableOrientation(value)]!;
-  }
-
-  DeviceOrientation _getApplicableOrientation(CameraValue value) {
-    return value.isRecordingVideo
-        ? value.recordingOrientation!
-        : (value.previewPauseOrientation ??
-            value.lockedCaptureOrientation ??
-            value.deviceOrientation);
-  }
-}

lib/screens/metering/components/topbar/components/widget_size_render.dart

@@ -1,32 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
-
-class SizeRenderWidget extends SingleChildRenderObjectWidget {
-  final ValueChanged<Size>? onLayout;
-
-  const SizeRenderWidget({
-    super.key,
-    super.child,
-    this.onLayout,
-  });
-
-  @override
-  SizeRenderBox createRenderObject(BuildContext context) => SizeRenderBox(onLayout: onLayout);
-}
-
-class SizeRenderBox extends RenderProxyBox {
-  final ValueChanged<Size>? onLayout;
-
-  SizeRenderBox({this.onLayout});
-
-  @override
-  void performLayout() {
-    if (child != null) {
-      child!.layout(constraints, parentUsesSize: true);
-      size = child!.size;
-    } else {
-      size = computeSizeForNoChild(constraints);
-    }
-    onLayout?.call(size);
-  }
-}

lib/screens/metering/components/topbar/widget_topbar.dart

@@ -1,233 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:lightmeter/platform_config.dart';
-import 'package:lightmeter/screens/metering/components/topbar/shape_topbar.dart';
-import 'package:lightmeter/screens/metering/components/topbar/components/widget_size_render.dart';
-import 'package:lightmeter/generated/l10n.dart';
-import 'package:lightmeter/data/models/exposure_pair.dart';
-import 'package:lightmeter/data/models/photography_values/iso_value.dart';
-import 'package:lightmeter/data/models/photography_values/nd_value.dart';
-import 'package:lightmeter/data/models/photography_values/photography_value.dart';
-import 'package:lightmeter/res/dimens.dart';
-
-import 'components/widget_camera_preview.dart';
-import 'components/shared/widget_dialog_animated.dart';
-import 'components/widget_dialog_picker.dart';
-import 'components/container_reading_value.dart';
-
-class MeteringTopBar extends StatefulWidget {
-  final ExposurePair? fastest;
-  final ExposurePair? slowest;
-  final double ev;
-  final IsoValue iso;
-  final NdValue nd;
-  final ValueChanged<IsoValue> onIsoChanged;
-  final ValueChanged<NdValue> onNdChanged;
-
-  final ValueChanged<double> onCutoutLayout;
-
-  const MeteringTopBar({
-    required this.fastest,
-    required this.slowest,
-    required this.ev,
-    required this.iso,
-    required this.nd,
-    required this.onIsoChanged,
-    required this.onNdChanged,
-    required this.onCutoutLayout,
-    super.key,
-  });
-
-  @override
-  State<MeteringTopBar> createState() => _MeteringTopBarState();
-}
-
-class _MeteringTopBarState extends State<MeteringTopBar> {
-  double stepHeight = 0.0;
-
-  @override
-  Widget build(BuildContext context) {
-    return CustomPaint(
-      painter: TopBarShape(
-        color: Theme.of(context).colorScheme.surface,
-        appendixWidth: stepHeight > 0
-            ? MediaQuery.of(context).size.width / 2 - Dimens.grid8 + Dimens.paddingM
-            : MediaQuery.of(context).size.width / 2 + Dimens.grid8 - Dimens.paddingM,
-        appendixHeight: stepHeight,
-      ),
-      child: Padding(
-        padding: const EdgeInsets.all(Dimens.paddingM),
-        child: SafeArea(
-          bottom: false,
-          child: MediaQuery(
-            data: MediaQuery.of(context),
-            child: Row(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              mainAxisSize: MainAxisSize.min,
-              children: [
-                Expanded(
-                  child: SizeRenderWidget(
-                    onLayout: (size) => _onReadingsLayout(size.height),
-                    child: Column(
-                      crossAxisAlignment: CrossAxisAlignment.stretch,
-                      children: [
-                        ReadingValueContainer(
-                          values: [
-                            ReadingValue(
-                              label: S.of(context).fastestExposurePair,
-                              value: widget.fastest != null ? widget.fastest!.toString() : '-',
-                            ),
-                            ReadingValue(
-                              label: S.of(context).slowestExposurePair,
-                              value: widget.fastest != null ? widget.slowest!.toString() : '-',
-                            ),
-                          ],
-                        ),
-                        /*
-                        const _InnerPadding(),
-                        ReadingValueContainer.singleValue(
-                          value: ReadingValue(
-                            label: 'EV',
-                            value: ev.toStringAsFixed(1),
-                          ),
-                        ),
-                        */
-                        const _InnerPadding(),
-                        Row(
-                          children: [
-                            Expanded(
-                              child: _IsoValueTile(
-                                value: widget.iso,
-                                onChanged: widget.onIsoChanged,
-                              ),
-                            ),
-                            const _InnerPadding(),
-                            Expanded(
-                              child: _NdValueTile(
-                                value: widget.nd,
-                                onChanged: widget.onNdChanged,
-                              ),
-                            ),
-                          ],
-                        )
-                      ],
-                    ),
-                  ),
-                ),
-                const _InnerPadding(),
-                const Expanded(
-                  child: ClipRRect(
-                    borderRadius: BorderRadius.all(Radius.circular(Dimens.borderRadiusM)),
-                    child: CameraView(),
-                  ),
-                ),
-              ],
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-
-  void _onReadingsLayout(double readingsSectionHeight) {
-    stepHeight = readingsSectionHeight -
-        ((MediaQuery.of(context).size.width - Dimens.grid8 - 2 * Dimens.paddingM) / 2) /
-            PlatformConfig.cameraPreviewAspectRatio;
-    widget.onCutoutLayout(stepHeight);
-  }
-}
-
-class _InnerPadding extends SizedBox {
-  const _InnerPadding() : super(height: Dimens.grid8, width: Dimens.grid8);
-}
-
-class _IsoValueTile extends StatelessWidget {
-  final IsoValue value;
-  final ValueChanged<IsoValue> onChanged;
-
-  const _IsoValueTile({required this.value, required this.onChanged});
-
-  @override
-  Widget build(BuildContext context) {
-    return _AnimatedDialogPicker<IsoValue>(
-      title: S.of(context).iso,
-      subtitle: S.of(context).filmSpeed,
-      selectedValue: value,
-      values: isoValues,
-      itemTitleBuilder: (_, value) => Text(value.value.toString()),
-      // using ascending order, because increase in film speed rises EV
-      evDifferenceBuilder: (selected, other) => selected.toStringDifference(other),
-      onChanged: onChanged,
-    );
-  }
-}
-
-class _NdValueTile extends StatelessWidget {
-  final NdValue value;
-  final ValueChanged<NdValue> onChanged;
-
-  const _NdValueTile({required this.value, required this.onChanged});
-
-  @override
-  Widget build(BuildContext context) {
-    return _AnimatedDialogPicker<NdValue>(
-      title: S.of(context).nd,
-      subtitle: S.of(context).ndFilterFactor,
-      selectedValue: value,
-      values: ndValues,
-      itemTitleBuilder: (_, value) => Text(
-        value.value == 0 ? S.of(context).none : value.value.toString(),
-      ),
-      // using descending order, because ND filter darkens image & lowers EV
-      evDifferenceBuilder: (selected, other) => other.toStringDifference(selected),
-      onChanged: onChanged,
-    );
-  }
-}
-
-class _AnimatedDialogPicker<T extends PhotographyValue> extends StatelessWidget {
-  final _key = GlobalKey<AnimatedDialogState>();
-  final String title;
-  final String subtitle;
-  final T selectedValue;
-  final List<T> values;
-  final DialogPickerItemBuilder<T> itemTitleBuilder;
-  final DialogPickerEvDifferenceBuilder<T> evDifferenceBuilder;
-  final ValueChanged<T> onChanged;
-
-  _AnimatedDialogPicker({
-    required this.title,
-    required this.subtitle,
-    required this.selectedValue,
-    required this.values,
-    required this.itemTitleBuilder,
-    required this.evDifferenceBuilder,
-    required this.onChanged,
-  }) : super();
-
-  @override
-  Widget build(BuildContext context) {
-    return AnimatedDialog(
-      key: _key,
-      closedChild: ReadingValueContainer.singleValue(
-        value: ReadingValue(
-          label: title,
-          value: selectedValue.value.toString(),
-        ),
-      ),
-      openedChild: MeteringScreenDialogPicker<T>(
-        title: title,
-        subtitle: subtitle,
-        initialValue: selectedValue,
-        values: values,
-        itemTitleBuilder: itemTitleBuilder,
-        evDifferenceBuilder: evDifferenceBuilder,
-        onCancel: () {
-          _key.currentState?.close();
-        },
-        onSelect: (value) {
-          _key.currentState?.close().then((_) => onChanged(value));
-        },
-      ),
-    );
-  }
-}

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

@@ -1,23 +0,0 @@
-abstract class CameraEvent {
-  const CameraEvent();
-}
-
-class InitializeEvent extends CameraEvent {
-  const InitializeEvent();
-}
-
-class ZoomChangedEvent extends CameraEvent {
-  final double value;
-
-  const ZoomChangedEvent(this.value);
-}
-
-class ExposureOffsetChangedEvent extends CameraEvent {
-  final double value;
-
-  const ExposureOffsetChangedEvent(this.value);
-}
-
-class ExposureOffsetResetEvent extends CameraEvent {
-  const ExposureOffsetResetEvent();
-}

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

@@ -1,43 +0,0 @@
-import 'package:camera/camera.dart';
-
-abstract class CameraState {
-  const CameraState();
-}
-
-class CameraInitState extends CameraState {
-  const CameraInitState();
-}
-
-class CameraLoadingState extends CameraState {
-  const CameraLoadingState();
-}
-
-class CameraInitializedState extends CameraState {
-  final CameraController controller;
-
-  const CameraInitializedState(this.controller);
-}
-
-class CameraActiveState extends CameraState {
-  final double minZoom;
-  final double maxZoom;
-  final double currentZoom;
-  final double minExposureOffset;
-  final double maxExposureOffset;
-  final double? exposureOffsetStep;
-  final double currentExposureOffset;
-
-  const CameraActiveState({
-    required this.minZoom,
-    required this.maxZoom,
-    required this.currentZoom,
-    required this.minExposureOffset,
-    required this.maxExposureOffset,
-    required this.exposureOffsetStep,
-    required this.currentExposureOffset,
-  });
-}
-
-class CameraErrorState extends CameraState {
-  const CameraErrorState();
-}

lib/screens/metering/ev_source/light_sensor/event_light_sensor.dart

@@ -1,3 +0,0 @@
-abstract class LightSensorEvent {
-  const LightSensorEvent();
-}

lib/screens/metering/ev_source/light_sensor/state_light_sensor.dart

@@ -1,7 +0,0 @@
-abstract class LightSensorState {
-  const LightSensorState();
-}
-
-class LightSensorInitState extends LightSensorState {
-  const LightSensorInitState();
-}

lib/screens/metering/flow_metering.dart

@@ -2,24 +2,25 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:lightmeter/data/haptics_service.dart';
 import 'package:lightmeter/data/light_sensor_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/metering_interactor.dart';
-import 'package:lightmeter/screens/metering/ev_source/light_sensor/bloc_light_sensor.dart';
 import 'package:provider/provider.dart';
 
-import 'ev_source/camera/bloc_camera.dart';
 import 'bloc_metering.dart';
 import 'communication/bloc_communication_metering.dart';
 import 'screen_metering.dart';
 
-class MeteringFlow extends StatelessWidget {
+class MeteringFlow extends StatefulWidget {
   const MeteringFlow({super.key});
 
+  @override
+  State<MeteringFlow> createState() => _MeteringFlowState();
+}
+
+class _MeteringFlowState extends State<MeteringFlow> {
   @override
   Widget build(BuildContext context) {
-    final sourceType = context.watch<EvSourceType>();
     return Provider(
       create: (context) => MeteringInteractor(
         context.read<UserPreferencesService>(),
@@ -37,20 +38,6 @@ class MeteringFlow extends StatelessWidget {
               context.read<StopType>(),
             ),
           ),
-          if (sourceType == EvSourceType.camera)
-            BlocProvider(
-              create: (context) => CameraBloc(
-                context.read<MeteringCommunicationBloc>(),
-                context.read<MeteringInteractor>(),
-              ),
-            ),
-          if (sourceType == EvSourceType.sensor)
-            BlocProvider(
-              create: (context) => LightSensorBloc(
-                context.read<MeteringCommunicationBloc>(),
-                context.read<MeteringInteractor>(),
-              ),
-            ),
         ],
         child: const MeteringScreen(),
       ),

lib/screens/metering/screen_metering.dart

@@ -1,13 +1,14 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:lightmeter/data/models/ev_source_type.dart';
 import 'package:lightmeter/data/models/photography_values/photography_value.dart';
+import 'package:lightmeter/environment.dart';
+import 'package:lightmeter/providers/ev_source_type_provider.dart';
 import 'package:lightmeter/res/dimens.dart';
 
 import 'components/bottom_controls/widget_bottom_controls.dart';
-import 'components/camera/widget_exposure_slider.dart';
+import 'components/camera/provider_container_camera.dart';
-import 'components/camera/widget_zoom_camera.dart';
+import 'components/light_sensor_container/provider_container_light_sensor.dart';
-import 'components/exposure_pairs_list/widget_list_exposure_pairs.dart';
-import 'components/topbar/widget_topbar.dart';
 import 'bloc_metering.dart';
 import 'event_metering.dart';
 import 'state_metering.dart';
@@ -20,8 +21,6 @@ class MeteringScreen extends StatefulWidget {
 }
 
 class _MeteringScreenState extends State<MeteringScreen> {
-  double topBarOverflow = 0.0;
-
   MeteringBloc get _bloc => context.read<MeteringBloc>();
 
   @override
@@ -34,85 +33,43 @@ class _MeteringScreenState extends State<MeteringScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: Theme.of(context).colorScheme.background,
-      body: BlocBuilder<MeteringBloc, MeteringState>(
+      body: Column(
-        builder: (context, state) => Column(
         children: [
-            MeteringTopBar(
+          Expanded(
+            child: BlocBuilder<MeteringBloc, MeteringState>(
+              builder: (context, state) => AnimatedSwitcher(
+                duration: Dimens.durationS,
+                child: context.watch<EvSourceType>() == EvSourceType.camera
+                    ? CameraContainerProvider(
                         fastest: state.fastest,
                         slowest: state.slowest,
-              ev: state.ev,
                         iso: state.iso,
                         nd: state.nd,
                         onIsoChanged: (value) => _bloc.add(IsoChangedEvent(value)),
                         onNdChanged: (value) => _bloc.add(NdChangedEvent(value)),
-              onCutoutLayout: (value) => topBarOverflow = value,
+                        exposurePairs: state.exposurePairs,
-            ),
+                      )
-            Expanded(
+                    : LightSensorContainerProvider(
-              child: Padding(
+                        fastest: state.fastest,
-                padding: const EdgeInsets.symmetric(horizontal: Dimens.paddingM),
+                        slowest: state.slowest,
-                child: _MiddleContentWrapper(
+                        iso: state.iso,
-                  topBarOverflow: topBarOverflow,
+                        nd: state.nd,
-                  leftContent: ExposurePairsList(state.exposurePairs),
+                        onIsoChanged: (value) => _bloc.add(IsoChangedEvent(value)),
-                  rightContent: Padding(
+                        onNdChanged: (value) => _bloc.add(NdChangedEvent(value)),
-                    padding: const EdgeInsets.symmetric(vertical: Dimens.paddingM),
+                        exposurePairs: state.exposurePairs,
-                    child: Column(
-                      children: const [
-                        Expanded(child: CameraExposureSlider()),
-                        SizedBox(height: Dimens.grid24),
-                        CameraZoomSlider(),
-                      ],
-                    ),
                       ),
               ),
             ),
           ),
           MeteringBottomControls(
+            onSwitchEvSourceType: context.read<Environment>().hasLightSensor
+                ? EvSourceTypeProvider.of(context).toggleType
+                : null,
             onMeasure: () => _bloc.add(const MeasureEvent()),
             onSettings: () => Navigator.pushNamed(context, 'settings'),
           ),
         ],
       ),
-      ),
-    );
-  }
-}
-
-class _MiddleContentWrapper extends StatelessWidget {
-  final double topBarOverflow;
-  final Widget leftContent;
-  final Widget rightContent;
-
-  const _MiddleContentWrapper({
-    required this.topBarOverflow,
-    required this.leftContent,
-    required this.rightContent,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return LayoutBuilder(
-      builder: (context, constraints) => OverflowBox(
-        alignment: Alignment.bottomCenter,
-        maxHeight: constraints.maxHeight + topBarOverflow.abs(),
-        maxWidth: constraints.maxWidth,
-        child: Row(
-          children: [
-            Expanded(
-              child: Padding(
-                padding: EdgeInsets.only(top: topBarOverflow >= 0 ? topBarOverflow : 0),
-                child: leftContent,
-              ),
-            ),
-            const SizedBox(width: Dimens.grid8),
-            Expanded(
-              child: Padding(
-                padding: EdgeInsets.only(top: topBarOverflow <= 0 ? -topBarOverflow : 0),
-                child: rightContent,
-              ),
-            ),
-          ],
-        ),
-      ),
     );
   }
 }