added CameraFeaturesListTile to metering section

lib/data/models/camera_feature.dart

@@ -1,6 +1,6 @@
 enum CameraFeature {
-  histogram,
   spotMetering,
+  histogram,
 }
 
 typedef CameraFeaturesConfig = Map<CameraFeature, bool>;

lib/l10n/intl_en.arb

@@ -40,6 +40,9 @@
     "meteringScreenFeatureExtremeExposurePairs": "Fastest & shortest exposure pairs",
     "meteringScreenFeatureFilmPicker": "Film picker",
     "meteringScreenFeatureHistogram": "Histogram",
+    "cameraFeatures": "Camera features",
+    "cameraFeatureSpotMetering": "Spot metering",
+    "cameraFeatureHistogram": "Histogram",
     "film": "Film",
     "filmPush": "Film (push)",
     "filmPull": "Film (pull)",

lib/providers/user_preferences_provider.dart

@@ -1,6 +1,7 @@
 import 'package:dynamic_color/dynamic_color.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
+import 'package:lightmeter/data/models/camera_feature.dart';
 import 'package:lightmeter/data/models/dynamic_colors_state.dart';
 import 'package:lightmeter/data/models/ev_source_type.dart';
 import 'package:lightmeter/data/models/metering_screen_layout_config.dart';
@@ -9,6 +10,7 @@ import 'package:lightmeter/data/models/theme_type.dart';
 import 'package:lightmeter/data/shared_prefs_service.dart';
 import 'package:lightmeter/generated/l10n.dart';
 import 'package:lightmeter/res/theme.dart';
+import 'package:lightmeter/utils/map_model.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
 class UserPreferencesProvider extends StatefulWidget {
@@ -51,6 +53,14 @@ class UserPreferencesProvider extends StatefulWidget {
     return _inheritFromEnumsModel(context, _Aspect.stopType).stopType;
   }
 
+  static CameraFeaturesConfig cameraConfigOf(BuildContext context) {
+    return context.findAncestorWidgetOfExactType<_CameraFeaturesModel>()!.data;
+  }
+
+  static bool cameraFeatureOf(BuildContext context, CameraFeature feature) {
+    return InheritedModel.inheritFrom<_CameraFeaturesModel>(context, aspect: feature)!.data[feature]!;
+  }
+
   static ThemeData themeOf(BuildContext context) {
     return _inheritFromEnumsModel(context, _Aspect.theme).theme;
   }
@@ -74,6 +84,7 @@ class _UserPreferencesProviderState extends State<UserPreferencesProvider> with
   late EvSourceType _evSourceType;
   late StopType _stopType = widget.userPreferencesService.stopType;
   late MeteringScreenLayoutConfig _meteringScreenLayout = widget.userPreferencesService.meteringScreenLayout;
+  late CameraFeaturesConfig _cameraFeatures = widget.userPreferencesService.cameraFeatures;
   late SupportedLocale _locale = widget.userPreferencesService.locale;
   late ThemeType _themeType = widget.userPreferencesService.themeType;
   late Color _primaryColor = widget.userPreferencesService.primaryColor;
@@ -83,7 +94,8 @@ class _UserPreferencesProviderState extends State<UserPreferencesProvider> with
   void initState() {
     super.initState();
     _evSourceType = widget.userPreferencesService.evSourceType;
-    _evSourceType = _evSourceType == EvSourceType.sensor && !widget.hasLightSensor ? EvSourceType.camera : _evSourceType;
+    _evSourceType =
+        _evSourceType == EvSourceType.sensor && !widget.hasLightSensor ? EvSourceType.camera : _evSourceType;
     WidgetsBinding.instance.addObserver(this);
   }
 
@@ -127,7 +139,10 @@ class _UserPreferencesProviderState extends State<UserPreferencesProvider> with
           themeType: _themeType,
           child: _MeteringScreenLayoutModel(
             data: _meteringScreenLayout,
-            child: widget.child,
+            child: _CameraFeaturesModel(
+              data: _cameraFeatures,
+              child: widget.child,
+            ),
           ),
         );
       },
@@ -172,6 +187,13 @@ class _UserPreferencesProviderState extends State<UserPreferencesProvider> with
     widget.userPreferencesService.meteringScreenLayout = _meteringScreenLayout;
   }
 
+  void setCameraFeature(CameraFeaturesConfig config) {
+    setState(() {
+      _cameraFeatures = config;
+    });
+    widget.userPreferencesService.cameraFeatures = _cameraFeatures;
+  }
+
   void setPrimaryColor(Color primaryColor) {
     setState(() {
       _primaryColor = primaryColor;
@@ -264,27 +286,16 @@ class _UserPreferencesModel extends InheritedModel<_Aspect> {
   }
 }
 
-class _MeteringScreenLayoutModel extends InheritedModel<MeteringScreenLayoutFeature> {
-  final Map<MeteringScreenLayoutFeature, bool> data;
-
+class _MeteringScreenLayoutModel extends MapModel<MeteringScreenLayoutFeature> {
   const _MeteringScreenLayoutModel({
-    required this.data,
+    required super.data,
+    required super.child,
+  });
+}
+
+class _CameraFeaturesModel extends MapModel<CameraFeature> {
+  const _CameraFeaturesModel({
+    required super.data,
     required super.child,
   });
-
-  @override
-  bool updateShouldNotify(_MeteringScreenLayoutModel oldWidget) => oldWidget.data != data;
-
-  @override
-  bool updateShouldNotifyDependent(
-    _MeteringScreenLayoutModel oldWidget,
-    Set<MeteringScreenLayoutFeature> dependencies,
-  ) {
-    for (final dependecy in dependencies) {
-      if (oldWidget.data[dependecy] != data[dependecy]) {
-        return true;
-      }
-    }
-    return false;
-  }
 }

lib/screens/settings/components/metering/components/camera_features/widget_list_tile_camera_features.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/data/models/camera_feature.dart';
+import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/providers/user_preferences_provider.dart';
+import 'package:lightmeter/screens/settings/components/shared/dialog_switch/widget_dialog_switch.dart';
+
+class CameraFeaturesListTile extends StatelessWidget {
+  const CameraFeaturesListTile({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      leading: const Icon(Icons.camera_alt),
+      title: Text(S.of(context).cameraFeatures),
+      onTap: () {
+        showDialog(
+          context: context,
+          builder: (_) => DialogSwitch<CameraFeature>(
+            icon: Icons.layers_outlined,
+            title: S.of(context).cameraFeatures,
+            values: UserPreferencesProvider.cameraConfigOf(context),
+            titleAdapter: _toStringLocalized,
+            onSave: UserPreferencesProvider.of(context).setCameraFeature,
+          ),
+        );
+      },
+    );
+  }
+
+  String _toStringLocalized(BuildContext context, CameraFeature feature) {
+    switch (feature) {
+      case CameraFeature.spotMetering:
+        return S.of(context).cameraFeatureSpotMetering;
+      case CameraFeature.histogram:
+        return S.of(context).cameraFeatureHistogram;
+    }
+  }
+}

lib/screens/settings/components/metering/widget_settings_section_metering.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
 import 'package:lightmeter/screens/settings/components/metering/components/calibration/widget_list_tile_calibration.dart';
+import 'package:lightmeter/screens/settings/components/metering/components/camera_features/widget_list_tile_camera_features.dart';
 import 'package:lightmeter/screens/settings/components/metering/components/equipment_profiles/widget_list_tile_equipment_profiles.dart';
 import 'package:lightmeter/screens/settings/components/metering/components/films/widget_list_tile_films.dart';
 import 'package:lightmeter/screens/settings/components/metering/components/fractional_stops/widget_list_tile_fractional_stops.dart';
@@ -20,6 +21,7 @@ class MeteringSettingsSection extends StatelessWidget {
         MeteringScreenLayoutListTile(),
         EquipmentProfilesListTile(),
         FilmsListTile(),
+        CameraFeaturesListTile(),
       ],
     );
   }

lib/screens/settings/components/shared/dialog_switch/widget_dialog_switch.dart

@@ -5,7 +5,7 @@ import 'package:lightmeter/res/dimens.dart';
 class DialogSwitch<T> extends StatefulWidget {
   final IconData icon;
   final String title;
-  final String description;
+  final String? description;
   final Map<T, bool> values;
   final String Function(BuildContext context, T value) titleAdapter;
   final ValueChanged<Map<T, bool>> onSave;
@@ -13,7 +13,7 @@ class DialogSwitch<T> extends StatefulWidget {
   const DialogSwitch({
     required this.icon,
     required this.title,
-    required this.description,
+    this.description,
     required this.values,
     required this.titleAdapter,
     required this.onSave,
@@ -39,11 +39,13 @@ class _DialogSwitchState<T> extends State<DialogSwitch<T>> {
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            Padding(
-              padding: const EdgeInsets.symmetric(horizontal: Dimens.paddingL),
-              child: Text(widget.description),
-            ),
-            const SizedBox(height: Dimens.grid16),
+            if (widget.description != null) ...[
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: Dimens.paddingL),
+                child: Text(widget.description!),
+              ),
+              const SizedBox(height: Dimens.grid16)
+            ],
             ListView(
               shrinkWrap: true,
               children: _features.entries

lib/utils/map_model.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/material.dart';
+
+class MapModel<T> extends InheritedModel<T> {
+  final Map<T, bool> data;
+
+  const MapModel({
+    required this.data,
+    required super.child,
+  });
+
+  @override
+  bool updateShouldNotify(MapModel oldWidget) => oldWidget.data != data;
+
+  @override
+  bool updateShouldNotifyDependent(
+    MapModel<T> oldWidget,
+    Set<T> dependencies,
+  ) {
+    for (final dependecy in dependencies) {
+      if (oldWidget.data[dependecy] != data[dependecy]) {
+        return true;
+      }
+    }
+    return false;
+  }
+}