created mobx ConfigStore

lib/main.dart

@@ -1,19 +1,41 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_mobx/flutter_mobx.dart';
+import 'package:provider/provider.dart';
+
+import 'stores/config_store.dart';
 
 void main() {
-  runApp(MyApp());
+  runApp(
+    MultiProvider(
+      providers: [
+        Provider<ConfigStore>(
+          create: (_) => ConfigStore()..load(),
+          dispose: (_, store) => store.dispose(),
+        ),
+      ],
+      child: MyApp(),
+    ),
+  );
 }
 
 class MyApp extends StatelessWidget {
   @override
-  Widget build(BuildContext context) => MaterialApp(
-    title: 'Flutter Demo',
-    theme: ThemeData(
-      primarySwatch: Colors.blue,
-      visualDensity: VisualDensity.adaptivePlatformDensity,
-    ),
-    home: MyHomePage(title: 'Flutter Demo Home Page'),
-  );
+  Widget build(BuildContext context) {
+    return Observer(
+      builder: (ctx) {
+        return MaterialApp(
+          title: 'Flutter Demo',
+          themeMode: ctx.watch<ConfigStore>().theme,
+          darkTheme: ThemeData.dark(),
+          theme: ThemeData(
+            primarySwatch: ctx.watch<ConfigStore>().accentColor,
+            visualDensity: VisualDensity.adaptivePlatformDensity,
+          ),
+          home: MyHomePage(title: 'Flutter Demo Home Page'),
+        );
+      },
+    );
+  }
 }
 
 class MyHomePage extends StatefulWidget {

lib/stores/config_store.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:mobx/mobx.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+part 'config_store.g.dart';
+
+class ConfigStore extends _ConfigStore with _$ConfigStore {}
+
+abstract class _ConfigStore with Store {
+  ReactionDisposer _saveReactionDisposer;
+
+  _ConfigStore() {
+    // persitently save settings each time they are changed
+    _saveReactionDisposer = reaction((_) => theme, (_) {
+      save();
+    });
+  }
+
+  void dispose() {
+    _saveReactionDisposer();
+  }
+
+  void load() async {
+    var prefs = await SharedPreferences.getInstance();
+    // set saved settings or create defaults
+    theme = _themeModeFromString(prefs.getString('theme') ?? 'dark');
+  }
+
+  void save() async {
+    var prefs = await SharedPreferences.getInstance();
+
+    await prefs.setString('theme', describeEnum(theme));
+  }
+
+  @observable
+  ThemeMode theme = ThemeMode.dark;
+
+  @observable
+  MaterialColor accentColor = Colors.green;
+}
+
+ThemeMode _themeModeFromString(String theme) =>
+    ThemeMode.values.firstWhere((e) => describeEnum(e) == theme);

lib/stores/config_store.g.dart

@@ -0,0 +1,49 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'config_store.dart';
+
+// **************************************************************************
+// StoreGenerator
+// **************************************************************************
+
+// ignore_for_file: non_constant_identifier_names, unnecessary_brace_in_string_interps, unnecessary_lambdas, prefer_expression_function_bodies, lines_longer_than_80_chars, avoid_as, avoid_annotating_with_dynamic
+
+mixin _$ConfigStore on _ConfigStore, Store {
+  final _$themeAtom = Atom(name: '_ConfigStore.theme');
+
+  @override
+  ThemeMode get theme {
+    _$themeAtom.reportRead();
+    return super.theme;
+  }
+
+  @override
+  set theme(ThemeMode value) {
+    _$themeAtom.reportWrite(value, super.theme, () {
+      super.theme = value;
+    });
+  }
+
+  final _$accentColorAtom = Atom(name: '_ConfigStore.accentColor');
+
+  @override
+  MaterialColor get accentColor {
+    _$accentColorAtom.reportRead();
+    return super.accentColor;
+  }
+
+  @override
+  set accentColor(MaterialColor value) {
+    _$accentColorAtom.reportWrite(value, super.accentColor, () {
+      super.accentColor = value;
+    });
+  }
+
+  @override
+  String toString() {
+    return '''
+theme: ${theme},
+accentColor: ${accentColor}
+    ''';
+  }
+}

pubspec.lock

@@ -244,11 +244,23 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.13.2"
+  flutter_mobx:
+    dependency: "direct main"
+    description:
+      name: flutter_mobx
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0+2"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   glob:
     dependency: transitive
     description:
@@ -354,6 +366,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.9.6+3"
+  mobx:
+    dependency: "direct main"
+    description:
+      name: mobx
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.1+2"
+  mobx_codegen:
+    dependency: "direct dev"
+    description:
+      name: mobx_codegen
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0+1"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.4"
   node_interop:
     dependency: transitive
     description:
@@ -452,6 +485,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.13"
+  provider:
+    dependency: "direct main"
+    description:
+      name: provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.3.2+1"
   pub_semver:
     dependency: transitive
     description:
@@ -480,6 +520,41 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.24.1"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.5.10"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.2+2"
+  shared_preferences_macos:
+    dependency: transitive
+    description:
+      name: shared_preferences_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.1+10"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.2+7"
   shelf:
     dependency: transitive
     description:
@@ -499,6 +574,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.99"
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.9.6"
   source_span:
     dependency: transitive
     description:

pubspec.yaml

@@ -27,6 +27,12 @@ dependencies:
   timeago: ^2.0.27
   lemmy_api_client: ^0.1.3
 
+  mobx: ^1.2.1
+  flutter_mobx: ^1.1.0
+  provider: ^4.3.1
+
+  shared_preferences: '>=0.5.0 <2.0.0'
+
   flutter:
     sdk: flutter
 
@@ -39,6 +45,7 @@ dev_dependencies:
     sdk: flutter
   effective_dart: ^1.0.0
   build_runner: ^1.10.0
+  mobx_codegen: ^1.1.0
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec