basic state management

lib/extensions/obtainProviderExtension.dart

@@ -0,0 +1,8 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+extension ObtainProviderExtension on BuildContext {
+  T obtainState<T extends ChangeNotifier>() {
+    return Provider.of<T>(this, listen: false);
+  }
+}

lib/main.dart

@@ -1,16 +1,24 @@
+import 'package:app/state/legalStatusState.dart';
+import 'package:app/state/mapState.dart';
 import 'package:app/view/home.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 void main() {
   runApp(
-    const MyApp(),
+    MultiProvider(
+      providers: [
+        ChangeNotifierProvider<LegalStatusState>(create: (context) => LegalStatusState()),
+        ChangeNotifierProvider<MapState>(create: (context) => MapState()),
+      ],
+      builder: (context, child) => const MyApp(),
+    )
   );
 }
 
 class MyApp extends StatelessWidget {
   const MyApp({super.key});
 
-  // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

lib/model/legelState.dart

@@ -0,0 +1,6 @@
+enum LegalState {
+  unknown,
+  allowed,
+  disallowedTime,
+  disallowedRegion
+}

lib/state/legalStatusState.dart

@@ -0,0 +1,18 @@
+import 'package:app/model/legelState.dart';
+import 'package:flutter/cupertino.dart';
+
+class LegalStatusState extends ChangeNotifier {
+  LegalState _legalState = LegalState.unknown;
+
+  LegalState get getLegalState => _legalState;
+
+  set setInSightOfDisallowedAreas(bool isInSight) {
+    _legalState = LegalState.disallowedRegion;
+    notifyListeners();
+  }
+
+  set setIsInDisallowedTimeRanges(bool isInDisallowedTime) {
+    _legalState = LegalState.disallowedTime;
+    notifyListeners();
+  }
+}

lib/state/mapState.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/cupertino.dart';
+
+class MapState extends ChangeNotifier {
+  bool _isLocationLock = false;
+
+  bool get followLocation => _isLocationLock;
+
+  toggleLocationLock() {
+    _isLocationLock = !_isLocationLock;
+    notifyListeners();
+  }
+}

lib/view/home.dart

@@ -1,5 +1,9 @@
+import 'package:app/extensions/obtainProviderExtension.dart';
+import 'package:app/state/mapState.dart';
+import 'package:app/view/legalStatus.dart';
 import 'package:app/view/map.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 class HomeView extends StatefulWidget {
   const HomeView({super.key});
@@ -18,12 +22,20 @@ class _HomePageState extends State<HomeView> {
         actions: [],
       ),
       floatingActionButton: FloatingActionButton(
-        child: const Icon(Icons.my_location),
-        onPressed: () {
-
-        },
+        child: Consumer<MapState>(builder: (context, value, child) => Icon(value.followLocation ? Icons.my_location : Icons.location_disabled)),
+        onPressed: () => context.obtainState<MapState>().toggleLocationLock(),
+      ),
+      body: const Column(
+        children: [
+          SizedBox(
+            height: 100,
+            child: LegalStatusView(),
+          ),
+          Expanded(
+            child: MapView(),
+          )
+        ],
       ),
-      body: MapView(),
     );
   }
 }

lib/view/legalStatus.dart

@@ -0,0 +1,21 @@
+import 'package:app/state/legalStatusState.dart';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+class LegalStatusView extends StatefulWidget {
+  const LegalStatusView({super.key});
+
+  @override
+  State<LegalStatusView> createState() => _LegalStatusViewState();
+}
+
+class _LegalStatusViewState extends State<LegalStatusView> {
+  @override
+  Widget build(BuildContext context) {
+    return Consumer<LegalStatusState>(
+      builder: (context, value, child) {
+        return Placeholder();
+      },
+    );
+  }
+}

lib/view/status.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+class StatusView extends StatefulWidget {
+  const StatusView({super.key});
+
+  @override
+  State<StatusView> createState() => _StatusViewState();
+}
+
+class _StatusViewState extends State<StatusView> {
+  @override
+  Widget build(BuildContext context) {
+    return const Placeholder();
+  }
+}