persist twoPageMode

lib/home_page.dart

@@ -7,7 +7,9 @@ import 'api.dart';
 import 'sheet.dart';
 
 class MyHomePage extends StatefulWidget {
-  const MyHomePage({super.key});
+  final Config config;
+
+  const MyHomePage({super.key, required this.config});
 
   @override
   State<MyHomePage> createState() => _MyHomePageState();
@@ -73,8 +75,11 @@ class _MyHomePageState extends State<MyHomePage> {
                 Navigator.push(
                   context,
                   MaterialPageRoute(
-                    builder: (context) =>
+                    builder: (context) => SheetViewerPage(
-                        SheetViewerPage(sheet: sheet, apiClient: apiClient!),
+                      sheet: sheet,
+                      apiClient: apiClient!,
+                      config: widget.config,
+                    ),
                   ),
                 );
               },

lib/login_page.dart

@@ -3,7 +3,6 @@ import 'package:jwt_decoder/jwt_decoder.dart';
 import 'package:sheetless/api.dart';
 import 'package:sheetless/home_page.dart';
 import 'package:sheetless/storage_helper.dart';
-import 'package:sheetless/utility.dart';
 
 class LoginPage extends StatefulWidget {
   const LoginPage({super.key});
@@ -77,10 +76,11 @@ class _LoginPageState extends State<LoginPage> {
     }
   }
 
-  void _navigateToMainPage() {
+  Future<void> _navigateToMainPage() async {
-    Navigator.of(
+    final config = await _storageHelper.readConfig();
-      context,
+    Navigator.of(context).pushReplacement(
-    ).pushReplacement(MaterialPageRoute(builder: (_) => MyHomePage()));
+      MaterialPageRoute(builder: (_) => MyHomePage(config: config)),
+    );
   }
 
   @override

lib/sheet_viewer_page.dart

@@ -6,15 +6,18 @@ import 'package:logging/logging.dart';
 import 'package:pdfrx/pdfrx.dart';
 import 'package:sheetless/api.dart';
 import 'package:sheetless/sheet.dart';
+import 'package:sheetless/storage_helper.dart';
 
 class SheetViewerPage extends StatefulWidget {
   final Sheet sheet;
   final ApiClient apiClient;
+  final Config config;
 
   const SheetViewerPage({
     super.key,
     required this.sheet,
     required this.apiClient,
+    required this.config,
   });
 
   @override
@@ -23,12 +26,12 @@ class SheetViewerPage extends StatefulWidget {
 
 class _SheetViewerPageState extends State<SheetViewerPage> {
   final log = Logger("SheetViewerPage");
+  final StorageHelper storageHelper = StorageHelper();
+
   int page = 1;
   int numPages = 1;
-  bool isFullscreen = false;
   late Future<bool> documentLoaded;
   PdfDocument? document;
-  bool twoPageMode = true;
   bool paintMode = false;
 
   @override
@@ -63,8 +66,10 @@ class _SheetViewerPageState extends State<SheetViewerPage> {
   }
 
   void toggleFullscreen() {
-    isFullscreen = !isFullscreen;
+    widget.config.fullscreen = !widget.config.fullscreen;
-    if (isFullscreen) {
+    storageHelper.writeConfig(widget.config);
+
+    if (widget.config.fullscreen) {
       log.info("enter fullscreen");
       // enter fullscreen
       SystemChrome.setEnabledSystemUIMode(
@@ -90,7 +95,7 @@ class _SheetViewerPageState extends State<SheetViewerPage> {
           IconButton(
             onPressed: () {
               setState(() {
-                if (twoPageMode) {
+                if (widget.config.twoPageMode) {
                   // TODO: notification that paint mode only in single page mode
                 } else {
                   paintMode = !paintMode;
@@ -102,14 +107,17 @@ class _SheetViewerPageState extends State<SheetViewerPage> {
           IconButton(
             onPressed: () {
               setState(() {
-                twoPageMode = !twoPageMode;
+                widget.config.twoPageMode = !widget.config.twoPageMode;
-                if (twoPageMode) {
+                storageHelper.writeConfig(widget.config);
+                if (widget.config.twoPageMode) {
                   paintMode = false;
                   // TODO: notification that paint mode was deactivated since only possible in single page mode
                 }
               });
             },
-            icon: Icon(twoPageMode ? Icons.filter_1 : Icons.filter_2),
+            icon: Icon(
+              widget.config.twoPageMode ? Icons.filter_1 : Icons.filter_2,
+            ),
           ),
         ],
       ),
@@ -164,7 +172,7 @@ class _SheetViewerPageState extends State<SheetViewerPage> {
                                     document: document,
                                     pageNumber: page,
                                     maximumDpi: 300,
-                                    alignment: twoPageMode
+                                    alignment: widget.config.twoPageMode
                                         ? Alignment.centerRight
                                         : Alignment.center,
                                   ),
@@ -179,7 +187,7 @@ class _SheetViewerPageState extends State<SheetViewerPage> {
                               ),
                             ),
                             Visibility(
-                              visible: twoPageMode == true,
+                              visible: widget.config.twoPageMode == true,
                               child: Expanded(
                                 child: Stack(
                                   children: [

lib/storage_helper.dart

@@ -3,8 +3,21 @@ import 'package:hive/hive.dart';
 
 enum SecureStorageKey { url, jwt, email, password }
 
+enum ConfigKey { twoPageMode }
+
+class Config {
+  Config({required this.twoPageMode, required this.fullscreen});
+
+  static const String keyTwoPageMode = "twoPageMode";
+  static const String keyFullscreen = "fullscreen";
+
+  bool twoPageMode;
+  bool fullscreen;
+}
+
 class StorageHelper {
   final sheetAccessTimesBox = "sheetAccessTimes";
+  final configBox = "config";
 
   late FlutterSecureStorage secureStorage;
 
@@ -22,6 +35,20 @@ class StorageHelper {
     return secureStorage.write(key: key.name, value: value);
   }
 
+  Future<Config> readConfig() async {
+    final box = await Hive.openBox(configBox);
+    return Config(
+      twoPageMode: box.get(Config.keyTwoPageMode) ?? false,
+      fullscreen: box.get(Config.keyFullscreen) ?? false,
+    );
+  }
+
+  Future<void> writeConfig(Config config) async {
+    final box = await Hive.openBox(configBox);
+    box.put(Config.keyTwoPageMode, config.twoPageMode);
+    box.put(Config.keyFullscreen, config.fullscreen);
+  }
+
   Future<Map<String, DateTime>> readSheetAccessTimes() async {
     final box = await Hive.openBox(sheetAccessTimesBox);
     return box.toMap().map(