add shared preferences to keep setting state

babylonia_terminal_launcher/lib/app.dart

@@ -7,14 +7,15 @@ import './screens/screens.dart';
 import './providers/providers.dart';
 
 class BabyloniaLauncher extends StatelessWidget {
-  const BabyloniaLauncher({super.key});
+  const BabyloniaLauncher({super.key, required this.settingsProvider});
+  final SettingsProvider settingsProvider;
 
   @override
   Widget build(BuildContext context) {
     return MultiProvider(
       providers: [
         ChangeNotifierProvider(
-          create: (context) => SettingsProvider(),
+          create: (context) => settingsProvider,
         ),
         ChangeNotifierProvider(
           create: (context) => GameStateProvider(),

babylonia_terminal_launcher/lib/main.dart

@@ -4,10 +4,17 @@ import 'package:media_kit/media_kit.dart';
 
 import './app.dart';
 import './messages/generated.dart';
+import './providers/providers.dart';
 
 void main() async {
   await initializeRust();
   WidgetsFlutterBinding.ensureInitialized();
   MediaKit.ensureInitialized();
-  runApp(const BabyloniaLauncher());
+
+  final SettingsProvider settings = SettingsProvider();
+  await settings.init();
+
+  runApp(BabyloniaLauncher(
+    settingsProvider: settings,
+  ));
 }

babylonia_terminal_launcher/lib/models/settings.dart

@@ -1,4 +1,7 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 enum BackgroundType {
   contain,
@@ -10,7 +13,40 @@ enum BackgroundType {
 }
 
 class Settings {
-  BackgroundType _backgroundType = BackgroundType.cover;
+  final SharedPreferences prefs;
+
+  Settings({required this.prefs});
+
+  static Future<Settings> create() async {
+    final prefs = await SharedPreferences.getInstance();
+    return Settings(prefs: prefs);
+  }
+
+  BackgroundType? _backgroundType;
+  String backgroundTypeKey = 'background_type';
+
+  BackgroundType get selectedBackgroundType {
+    final bt = prefs.getString(backgroundTypeKey);
+    if (bt == null) {
+      _backgroundType = BackgroundType.disable;
+      prefs.setString(
+        backgroundTypeKey,
+        getStringNameOfBackgroundType(_backgroundType!),
+      );
+    } else {
+      _backgroundType ??= getBackgroundTypeFromString(bt);
+    }
+
+    return _backgroundType!;
+  }
+
+  set selectedBackgroundType(BackgroundType selectedBackground) {
+    _backgroundType = selectedBackground;
+    prefs.setString(
+      backgroundTypeKey,
+      getStringNameOfBackgroundType(selectedBackground),
+    );
+  }
 
   static final List<BackgroundType> backgoundList = [
     BackgroundType.contain,
@@ -74,12 +110,4 @@ class Settings {
             'Can\'t convert BackgroundType to widget BoxFit!');
     }
   }
-
-  BackgroundType get selectedBackgroundType {
-    return _backgroundType;
-  }
-
-  set selectedBackgroundType(BackgroundType selectedBackground) {
-    _backgroundType = selectedBackground;
-  }
 }

babylonia_terminal_launcher/lib/providers/game_state_provider.dart

@@ -16,6 +16,7 @@ class GameStateProvider with ChangeNotifier {
         break;
       }
       isUpdating = false;
+      notifyListeners();
     }
   }
 }

babylonia_terminal_launcher/lib/providers/settings_provider.dart

@@ -3,7 +3,11 @@ import 'package:flutter/material.dart';
 import './../models/settings.dart';
 
 class SettingsProvider with ChangeNotifier {
-  final Settings _settings = Settings();
+  late final Settings _settings;
+
+  Future init() async {
+    _settings = await Settings.create();
+  }
 
   set setSelectedBackgroundType(BackgroundType selectedBackground) {
     _settings.selectedBackgroundType = selectedBackground;

babylonia_terminal_launcher/pubspec.yaml

@@ -46,6 +46,7 @@ dependencies:
   provider: ^6.1.2
   rinf: ^6.9.0
   protobuf: ^3.1.0
+  shared_preferences: ^2.2.3
 
 dependency_overrides:
   media_kit: