added StopTypeProvider

lib/main.dart

@@ -5,6 +5,7 @@ import 'models/photography_value.dart';
 import 'res/theme.dart';
 import 'screens/metering/metering_bloc.dart';
 import 'screens/metering/metering_screen.dart';
+import 'utils/stop_type_provider.dart';
 
 void main() {
   runApp(const MyApp());
@@ -15,15 +16,17 @@ class MyApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return BlocProvider(
-      create: (context) => MeteringBloc(Stop.third),
-      child: MaterialApp(
-        title: 'Flutter Demo',
-        theme: ThemeData(
-          useMaterial3: true,
-          colorScheme: lightColorScheme,
+    return StopTypeProvider(
+      child: BlocProvider(
+        create: (context) => MeteringBloc(context.read<StopType>()),
+        child: MaterialApp(
+          title: 'Flutter Demo',
+          theme: ThemeData(
+            useMaterial3: true,
+            colorScheme: lightColorScheme,
+          ),
+          home: const MeteringScreen(),
         ),
-        home: const MeteringScreen(),
       ),
     );
   }

lib/models/aperture_value.dart

@@ -19,49 +19,49 @@ class ApertureValue extends PhotographyValue<double> {
 }
 
 const List<ApertureValue> apertureValues = [
-  ApertureValue(1.0, Stop.full),
-  ApertureValue(1.1, Stop.third),
-  ApertureValue(1.2, Stop.half),
-  ApertureValue(1.2, Stop.third),
-  ApertureValue(1.4, Stop.full),
-  ApertureValue(1.6, Stop.third),
-  ApertureValue(1.7, Stop.half),
-  ApertureValue(1.8, Stop.third),
-  ApertureValue(2.0, Stop.full),
-  ApertureValue(2.2, Stop.third),
-  ApertureValue(2.4, Stop.half),
-  ApertureValue(2.4, Stop.third),
-  ApertureValue(2.8, Stop.full),
-  ApertureValue(3.2, Stop.third),
-  ApertureValue(3.3, Stop.half),
-  ApertureValue(3.5, Stop.third),
-  ApertureValue(4.0, Stop.full),
-  ApertureValue(4.5, Stop.third),
-  ApertureValue(4.8, Stop.half),
-  ApertureValue(5.0, Stop.third),
-  ApertureValue(5.6, Stop.full),
-  ApertureValue(6.3, Stop.third),
-  ApertureValue(6.7, Stop.half),
-  ApertureValue(7.1, Stop.third),
-  ApertureValue(8, Stop.full),
-  ApertureValue(9, Stop.third),
-  ApertureValue(9.5, Stop.half),
-  ApertureValue(10, Stop.third),
-  ApertureValue(11, Stop.full),
-  ApertureValue(13, Stop.third),
-  ApertureValue(13, Stop.half),
-  ApertureValue(14, Stop.third),
-  ApertureValue(16, Stop.full),
-  ApertureValue(18, Stop.third),
-  ApertureValue(19, Stop.half),
-  ApertureValue(20, Stop.third),
-  ApertureValue(22, Stop.full),
-  ApertureValue(25, Stop.third),
-  ApertureValue(27, Stop.half),
-  ApertureValue(29, Stop.third),
-  ApertureValue(32, Stop.full),
-  ApertureValue(36, Stop.third),
-  ApertureValue(38, Stop.half),
-  ApertureValue(42, Stop.third),
-  ApertureValue(45, Stop.full),
+  ApertureValue(1.0, StopType.full),
+  ApertureValue(1.1, StopType.third),
+  ApertureValue(1.2, StopType.half),
+  ApertureValue(1.2, StopType.third),
+  ApertureValue(1.4, StopType.full),
+  ApertureValue(1.6, StopType.third),
+  ApertureValue(1.7, StopType.half),
+  ApertureValue(1.8, StopType.third),
+  ApertureValue(2.0, StopType.full),
+  ApertureValue(2.2, StopType.third),
+  ApertureValue(2.4, StopType.half),
+  ApertureValue(2.4, StopType.third),
+  ApertureValue(2.8, StopType.full),
+  ApertureValue(3.2, StopType.third),
+  ApertureValue(3.3, StopType.half),
+  ApertureValue(3.5, StopType.third),
+  ApertureValue(4.0, StopType.full),
+  ApertureValue(4.5, StopType.third),
+  ApertureValue(4.8, StopType.half),
+  ApertureValue(5.0, StopType.third),
+  ApertureValue(5.6, StopType.full),
+  ApertureValue(6.3, StopType.third),
+  ApertureValue(6.7, StopType.half),
+  ApertureValue(7.1, StopType.third),
+  ApertureValue(8, StopType.full),
+  ApertureValue(9, StopType.third),
+  ApertureValue(9.5, StopType.half),
+  ApertureValue(10, StopType.third),
+  ApertureValue(11, StopType.full),
+  ApertureValue(13, StopType.third),
+  ApertureValue(13, StopType.half),
+  ApertureValue(14, StopType.third),
+  ApertureValue(16, StopType.full),
+  ApertureValue(18, StopType.third),
+  ApertureValue(19, StopType.half),
+  ApertureValue(20, StopType.third),
+  ApertureValue(22, StopType.full),
+  ApertureValue(25, StopType.third),
+  ApertureValue(27, StopType.half),
+  ApertureValue(29, StopType.third),
+  ApertureValue(32, StopType.full),
+  ApertureValue(36, StopType.third),
+  ApertureValue(38, StopType.half),
+  ApertureValue(42, StopType.third),
+  ApertureValue(45, StopType.full),
 ];

lib/models/iso_value.dart

@@ -11,38 +11,38 @@ class IsoValue extends PhotographyValue<int> {
 }
 
 const List<IsoValue> isoValues = [
-  IsoValue(3, Stop.full),
-  IsoValue(4, Stop.third),
-  IsoValue(5, Stop.third),
-  IsoValue(6, Stop.full),
-  IsoValue(8, Stop.third),
-  IsoValue(10, Stop.third),
-  IsoValue(12, Stop.full),
-  IsoValue(16, Stop.third),
-  IsoValue(20, Stop.third),
-  IsoValue(25, Stop.full),
-  IsoValue(32, Stop.third),
-  IsoValue(40, Stop.third),
-  IsoValue(50, Stop.full),
-  IsoValue(64, Stop.third),
-  IsoValue(80, Stop.third),
-  IsoValue(100, Stop.full),
-  IsoValue(125, Stop.third),
-  IsoValue(160, Stop.third),
-  IsoValue(200, Stop.full),
-  IsoValue(250, Stop.third),
-  IsoValue(320, Stop.third),
-  IsoValue(400, Stop.full),
-  IsoValue(500, Stop.third),
-  IsoValue(640, Stop.third),
-  IsoValue(800, Stop.full),
-  IsoValue(1000, Stop.third),
-  IsoValue(1250, Stop.third),
-  IsoValue(1600, Stop.full),
-  IsoValue(2000, Stop.third),
-  IsoValue(2500, Stop.third),
-  IsoValue(3200, Stop.full),
-  IsoValue(4000, Stop.third),
-  IsoValue(5000, Stop.third),
-  IsoValue(6400, Stop.full),
+  IsoValue(3, StopType.full),
+  IsoValue(4, StopType.third),
+  IsoValue(5, StopType.third),
+  IsoValue(6, StopType.full),
+  IsoValue(8, StopType.third),
+  IsoValue(10, StopType.third),
+  IsoValue(12, StopType.full),
+  IsoValue(16, StopType.third),
+  IsoValue(20, StopType.third),
+  IsoValue(25, StopType.full),
+  IsoValue(32, StopType.third),
+  IsoValue(40, StopType.third),
+  IsoValue(50, StopType.full),
+  IsoValue(64, StopType.third),
+  IsoValue(80, StopType.third),
+  IsoValue(100, StopType.full),
+  IsoValue(125, StopType.third),
+  IsoValue(160, StopType.third),
+  IsoValue(200, StopType.full),
+  IsoValue(250, StopType.third),
+  IsoValue(320, StopType.third),
+  IsoValue(400, StopType.full),
+  IsoValue(500, StopType.third),
+  IsoValue(640, StopType.third),
+  IsoValue(800, StopType.full),
+  IsoValue(1000, StopType.third),
+  IsoValue(1250, StopType.third),
+  IsoValue(1600, StopType.full),
+  IsoValue(2000, StopType.third),
+  IsoValue(2500, StopType.third),
+  IsoValue(3200, StopType.full),
+  IsoValue(4000, StopType.third),
+  IsoValue(5000, StopType.third),
+  IsoValue(6400, StopType.full),
 ];

lib/models/photography_value.dart

@@ -2,11 +2,11 @@ part 'aperture_value.dart';
 part 'iso_value.dart';
 part 'shutter_speed_value.dart';
 
-enum Stop { full, half, third }
+enum StopType { full, half, third }
 
 abstract class PhotographyValue<T> {
   final T rawValue;
-  final Stop stopType;
+  final StopType stopType;
 
   const PhotographyValue(this.rawValue, this.stopType);
 
@@ -14,20 +14,20 @@ abstract class PhotographyValue<T> {
 }
 
 extension PhotographyValues<T extends PhotographyValue> on List<T> {
-  List<T> whereStopType(Stop stopType) {
+  List<T> whereStopType(StopType stopType) {
     switch (stopType) {
-      case Stop.full:
-        return where((e) => e.stopType == Stop.full).toList();
-      case Stop.half:
-        return where((e) => e.stopType == Stop.full || e.stopType == Stop.half).toList();
-      case Stop.third:
-        return where((e) => e.stopType == Stop.full || e.stopType == Stop.third).toList();
+      case StopType.full:
+        return where((e) => e.stopType == StopType.full).toList();
+      case StopType.half:
+        return where((e) => e.stopType == StopType.full || e.stopType == StopType.half).toList();
+      case StopType.third:
+        return where((e) => e.stopType == StopType.full || e.stopType == StopType.third).toList();
     }
   }
 
-  List<T> fullStops() => whereStopType(Stop.full);
+  List<T> fullStops() => whereStopType(StopType.full);
 
-  List<T> halfStops() => whereStopType(Stop.half);
+  List<T> halfStops() => whereStopType(StopType.half);
 
-  List<T> thirdStops() => whereStopType(Stop.third);
+  List<T> thirdStops() => whereStopType(StopType.third);
 }

lib/models/shutter_speed_value.dart

@@ -23,65 +23,65 @@ class ShutterSpeedValue extends PhotographyValue<double> {
 }
 
 const List<ShutterSpeedValue> shutterSpeedValues = [
-  ShutterSpeedValue(2000, true, Stop.full),
-  ShutterSpeedValue(1600, true, Stop.third),
-  ShutterSpeedValue(1500, true, Stop.half),
-  ShutterSpeedValue(1250, true, Stop.third),
-  ShutterSpeedValue(1000, true, Stop.full),
-  ShutterSpeedValue(800, true, Stop.third),
-  ShutterSpeedValue(750, true, Stop.half),
-  ShutterSpeedValue(640, true, Stop.third),
-  ShutterSpeedValue(500, true, Stop.full),
-  ShutterSpeedValue(400, true, Stop.third),
-  ShutterSpeedValue(350, true, Stop.half),
-  ShutterSpeedValue(320, true, Stop.third),
-  ShutterSpeedValue(250, true, Stop.full),
-  ShutterSpeedValue(200, true, Stop.third),
-  ShutterSpeedValue(180, true, Stop.half),
-  ShutterSpeedValue(160, true, Stop.third),
-  ShutterSpeedValue(125, true, Stop.full),
-  ShutterSpeedValue(100, true, Stop.third),
-  ShutterSpeedValue(90, true, Stop.half),
-  ShutterSpeedValue(80, true, Stop.third),
-  ShutterSpeedValue(60, true, Stop.full),
-  ShutterSpeedValue(50, true, Stop.third),
-  ShutterSpeedValue(45, true, Stop.half),
-  ShutterSpeedValue(40, true, Stop.third),
-  ShutterSpeedValue(30, true, Stop.full),
-  ShutterSpeedValue(25, true, Stop.third),
-  ShutterSpeedValue(20, true, Stop.half),
-  ShutterSpeedValue(20, true, Stop.third),
-  ShutterSpeedValue(15, true, Stop.full),
-  ShutterSpeedValue(13, true, Stop.third),
-  ShutterSpeedValue(10, true, Stop.half),
-  ShutterSpeedValue(10, true, Stop.third),
-  ShutterSpeedValue(8, true, Stop.full),
-  ShutterSpeedValue(6, true, Stop.third),
-  ShutterSpeedValue(6, true, Stop.half),
-  ShutterSpeedValue(5, true, Stop.third),
-  ShutterSpeedValue(4, true, Stop.full),
-  ShutterSpeedValue(3, true, Stop.third),
-  ShutterSpeedValue(3, true, Stop.half),
-  ShutterSpeedValue(2.5, true, Stop.third),
-  ShutterSpeedValue(2, true, Stop.full),
-  ShutterSpeedValue(1.6, true, Stop.third),
-  ShutterSpeedValue(1.5, true, Stop.half),
-  ShutterSpeedValue(1.3, true, Stop.third),
-  ShutterSpeedValue(1, false, Stop.full),
-  ShutterSpeedValue(1.3, false, Stop.third),
-  ShutterSpeedValue(1.5, false, Stop.half),
-  ShutterSpeedValue(1.6, false, Stop.third),
-  ShutterSpeedValue(2, false, Stop.full),
-  ShutterSpeedValue(2.5, false, Stop.third),
-  ShutterSpeedValue(3, false, Stop.half),
-  ShutterSpeedValue(3, false, Stop.third),
-  ShutterSpeedValue(4, false, Stop.full),
-  ShutterSpeedValue(5, false, Stop.third),
-  ShutterSpeedValue(6, false, Stop.half),
-  ShutterSpeedValue(6, false, Stop.third),
-  ShutterSpeedValue(8, false, Stop.full),
-  ShutterSpeedValue(10, false, Stop.third),
-  ShutterSpeedValue(12, false, Stop.half),
-  ShutterSpeedValue(13, false, Stop.third),
-  ShutterSpeedValue(16, false, Stop.full),
+  ShutterSpeedValue(2000, true, StopType.full),
+  ShutterSpeedValue(1600, true, StopType.third),
+  ShutterSpeedValue(1500, true, StopType.half),
+  ShutterSpeedValue(1250, true, StopType.third),
+  ShutterSpeedValue(1000, true, StopType.full),
+  ShutterSpeedValue(800, true, StopType.third),
+  ShutterSpeedValue(750, true, StopType.half),
+  ShutterSpeedValue(640, true, StopType.third),
+  ShutterSpeedValue(500, true, StopType.full),
+  ShutterSpeedValue(400, true, StopType.third),
+  ShutterSpeedValue(350, true, StopType.half),
+  ShutterSpeedValue(320, true, StopType.third),
+  ShutterSpeedValue(250, true, StopType.full),
+  ShutterSpeedValue(200, true, StopType.third),
+  ShutterSpeedValue(180, true, StopType.half),
+  ShutterSpeedValue(160, true, StopType.third),
+  ShutterSpeedValue(125, true, StopType.full),
+  ShutterSpeedValue(100, true, StopType.third),
+  ShutterSpeedValue(90, true, StopType.half),
+  ShutterSpeedValue(80, true, StopType.third),
+  ShutterSpeedValue(60, true, StopType.full),
+  ShutterSpeedValue(50, true, StopType.third),
+  ShutterSpeedValue(45, true, StopType.half),
+  ShutterSpeedValue(40, true, StopType.third),
+  ShutterSpeedValue(30, true, StopType.full),
+  ShutterSpeedValue(25, true, StopType.third),
+  ShutterSpeedValue(20, true, StopType.half),
+  ShutterSpeedValue(20, true, StopType.third),
+  ShutterSpeedValue(15, true, StopType.full),
+  ShutterSpeedValue(13, true, StopType.third),
+  ShutterSpeedValue(10, true, StopType.half),
+  ShutterSpeedValue(10, true, StopType.third),
+  ShutterSpeedValue(8, true, StopType.full),
+  ShutterSpeedValue(6, true, StopType.third),
+  ShutterSpeedValue(6, true, StopType.half),
+  ShutterSpeedValue(5, true, StopType.third),
+  ShutterSpeedValue(4, true, StopType.full),
+  ShutterSpeedValue(3, true, StopType.third),
+  ShutterSpeedValue(3, true, StopType.half),
+  ShutterSpeedValue(2.5, true, StopType.third),
+  ShutterSpeedValue(2, true, StopType.full),
+  ShutterSpeedValue(1.6, true, StopType.third),
+  ShutterSpeedValue(1.5, true, StopType.half),
+  ShutterSpeedValue(1.3, true, StopType.third),
+  ShutterSpeedValue(1, false, StopType.full),
+  ShutterSpeedValue(1.3, false, StopType.third),
+  ShutterSpeedValue(1.5, false, StopType.half),
+  ShutterSpeedValue(1.6, false, StopType.third),
+  ShutterSpeedValue(2, false, StopType.full),
+  ShutterSpeedValue(2.5, false, StopType.third),
+  ShutterSpeedValue(3, false, StopType.half),
+  ShutterSpeedValue(3, false, StopType.third),
+  ShutterSpeedValue(4, false, StopType.full),
+  ShutterSpeedValue(5, false, StopType.third),
+  ShutterSpeedValue(6, false, StopType.half),
+  ShutterSpeedValue(6, false, StopType.third),
+  ShutterSpeedValue(8, false, StopType.full),
+  ShutterSpeedValue(10, false, StopType.third),
+  ShutterSpeedValue(12, false, StopType.half),
+  ShutterSpeedValue(13, false, StopType.third),
+  ShutterSpeedValue(16, false, StopType.full),
 ];

lib/screens/metering/components/exposure_pairs_list/components/exposure_pair_item.dart

@@ -32,22 +32,22 @@ class ExposurePaitListItem<T extends PhotographyValue> extends StatelessWidget {
 
   TextStyle labelTextStyle(BuildContext context) {
     switch (value.stopType) {
-      case Stop.full:
+      case StopType.full:
         return Theme.of(context).textTheme.bodyLarge!;
-      case Stop.half:
+      case StopType.half:
         return Theme.of(context).textTheme.bodyMedium!;
-      case Stop.third:
+      case StopType.third:
         return Theme.of(context).textTheme.bodySmall!;
     }
   }
 
   double tickLength() {
     switch (value.stopType) {
-      case Stop.full:
+      case StopType.full:
         return Dimens.grid24;
-      case Stop.half:
+      case StopType.half:
         return Dimens.grid16;
-      case Stop.third:
+      case StopType.third:
         return Dimens.grid8;
     }
   }

lib/screens/metering/metering_bloc.dart

@@ -8,7 +8,7 @@ import 'metering_event.dart';
 import 'metering_state.dart';
 
 class MeteringBloc extends Bloc<MeteringEvent, MeteringState> {
-  final Stop stopType;
+  final StopType stopType;
   late final _apertureValues = apertureValues.whereStopType(stopType);
   late final _shutterSpeedValues = shutterSpeedValues.whereStopType(stopType);
   late final _isoValues = isoValues.whereStopType(stopType);
@@ -53,17 +53,17 @@ class MeteringBloc extends Bloc<MeteringEvent, MeteringState> {
   List<ExposurePair> _buildExposureValues(double ev) {
     late final int evSteps;
     switch (stopType) {
-      case Stop.full:
+      case StopType.full:
         evSteps = ev.floor();
         break;
-      case Stop.half:
+      case StopType.half:
         evSteps = (ev / 0.5).floor();
         break;
-      case Stop.third:
+      case StopType.third:
         evSteps = (ev / 0.3).floor();
         break;
     }
-    final evOffset = _shutterSpeedValues.indexOf(const ShutterSpeedValue(1, false, Stop.full)) - evSteps;
+    final evOffset = _shutterSpeedValues.indexOf(const ShutterSpeedValue(1, false, StopType.full)) - evSteps;
 
     late final int apertureOffset;
     late final int shutterSpeedOffset;

lib/utils/stop_type_provider.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/models/photography_value.dart';
+import 'package:provider/provider.dart';
+
+class StopTypeProvider extends StatefulWidget {
+  final Widget? child;
+
+  const StopTypeProvider({this.child, super.key});
+
+  @override
+  State<StopTypeProvider> createState() => StopTypeProviderState();
+}
+
+class StopTypeProviderState extends State<StopTypeProvider> {
+  StopType stopType = StopType.full;
+
+  @override
+  Widget build(BuildContext context) {
+    return Provider.value(
+      value: stopType,
+      child: Provider.value(
+        value: this,
+        child: widget.child,
+      ),
+    );
+  }
+
+  void setStopType(StopType type) {
+    setState(() {
+      stopType = type;
+    });
+  }
+}

pubspec.yaml

@@ -11,6 +11,7 @@ dependencies:
     sdk: flutter
   flutter_bloc: ^8.1.1
   material_color_utilities: ^0.2.0
+  provider: ^6.0.4
 
 dev_dependencies:
   google_fonts: ^3.0.1