refresh Homepage on return from menu item

lib/components/main_menu.dart

@@ -3,7 +3,8 @@ import 'package:wetter/screens/locations.dart';
 import 'package:wetter/screens/settings.dart';
 
 class NavBar extends StatelessWidget {
-  const NavBar({Key? key}) : super(key: key);
+  final Function refreshPageFrom;
+  const NavBar({Key? key, required this.refreshPageFrom}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -31,6 +32,10 @@ class NavBar extends StatelessWidget {
               Navigator.push(
                 context,
                 MaterialPageRoute(builder: (context) => const Locations()),
+              ).then(
+                (value) {
+                  refreshPageFrom();
+                },
               );
             }),
           )

lib/main.dart

@@ -25,6 +25,12 @@ class _MyAppState extends State<MyApp> {
     super.initState();
   }
 
+  void refresh() {
+    setState(() {
+      _locations = UserPreferences.getSavedLocations();
+    });
+  }
+
   Widget buildContent() {
     return DefaultTabController(
       length: _locations.length,
@@ -37,7 +43,9 @@ class _MyAppState extends State<MyApp> {
                   tabs: [for (String name in _locations) Tab(icon: Text(name))],
                 ),
         ),
-        drawer: const NavBar(),
+        drawer: NavBar(
+          refreshPageFrom: refresh,
+        ),
         body: (_locations.isEmpty)
             ? const Text("No locations")
             : TabBarView(