Beta (#1234)

place_tracker/lib/place_details.dart

@@ -19,10 +19,10 @@ class PlaceDetails extends StatefulWidget {
   }) : super(key: key);
 
   @override
-  PlaceDetailsState createState() => PlaceDetailsState();
+  State<PlaceDetails> createState() => _PlaceDetailsState();
 }
 
-class PlaceDetailsState extends State<PlaceDetails> {
+class _PlaceDetailsState extends State<PlaceDetails> {
   late Place _place;
   GoogleMapController? _mapController;
   final Set<Marker> _markers = {};

place_tracker/lib/place_list.dart

@@ -13,10 +13,10 @@ class PlaceList extends StatefulWidget {
   const PlaceList({Key? key}) : super(key: key);
 
   @override
-  PlaceListState createState() => PlaceListState();
+  State<PlaceList> createState() => _PlaceListState();
 }
 
-class PlaceListState extends State<PlaceList> {
+class _PlaceListState extends State<PlaceList> {
   final ScrollController _scrollController = ScrollController();
 
   @override
@@ -77,16 +77,16 @@ class _CategoryButton extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    late String _buttonText;
+    late String buttonText;
     switch (category) {
       case PlaceCategory.favorite:
-        _buttonText = 'Favorites';
+        buttonText = 'Favorites';
         break;
       case PlaceCategory.visited:
-        _buttonText = 'Visited';
+        buttonText = 'Visited';
         break;
       case PlaceCategory.wantToGo:
-        _buttonText = 'Want To Go';
+        buttonText = 'Want To Go';
     }
 
     return Container(
@@ -102,7 +102,7 @@ class _CategoryButton extends StatelessWidget {
         height: 50.0,
         child: TextButton(
           child: Text(
-            _buttonText,
+            buttonText,
             style: TextStyle(
               fontSize: selected ? 20.0 : 18.0,
               color: selected ? Colors.blue : Colors.black87,

place_tracker/lib/place_map.dart

@@ -59,10 +59,10 @@ class PlaceMap extends StatefulWidget {
   }) : super(key: key);
 
   @override
-  PlaceMapState createState() => PlaceMapState();
+  State<PlaceMap> createState() => _PlaceMapState();
 }
 
-class PlaceMapState extends State<PlaceMap> {
+class _PlaceMapState extends State<PlaceMap> {
   Completer<GoogleMapController> mapController = Completer();
 
   MapType _currentMapType = MapType.normal;
@@ -170,16 +170,18 @@ class PlaceMapState extends State<PlaceMap> {
   Future<void> _confirmAddPlace(BuildContext context) async {
     if (_pendingMarker != null) {
       // Create a new Place and map it to the marker we just added.
+      final appState = Provider.of<AppState>(context, listen: false);
       final newPlace = Place(
         id: const Uuid().v1(),
         latLng: _pendingMarker!.position,
         name: _pendingMarker!.infoWindow.title!,
-        category:
-            Provider.of<AppState>(context, listen: false).selectedCategory,
+        category: appState.selectedCategory,
       );
 
-      var placeMarker = await _getPlaceMarkerIcon(context,
-          Provider.of<AppState>(context, listen: false).selectedCategory);
+      final scaffoldMessenger = ScaffoldMessenger.of(context);
+
+      var placeMarker =
+          await _getPlaceMarkerIcon(context, appState.selectedCategory);
 
       setState(() {
         final updatedMarker = _pendingMarker!.copyWith(
@@ -202,7 +204,7 @@ class PlaceMapState extends State<PlaceMap> {
       });
 
       // Show a confirmation snackbar that has an action to edit the new place.
-      ScaffoldMessenger.of(context).showSnackBar(
+      scaffoldMessenger.showSnackBar(
         SnackBar(
           duration: const Duration(seconds: 3),
           content:
@@ -217,20 +219,17 @@ class PlaceMapState extends State<PlaceMap> {
       );
 
       // Add the new place to the places stored in appState.
-      final newPlaces =
-          List<Place>.from(Provider.of<AppState>(context, listen: false).places)
-            ..add(newPlace);
+      final newPlaces = List<Place>.from(appState.places)..add(newPlace);
 
       // Manually update our map configuration here since our map is already
       // updated with the new marker. Otherwise, the map would be reconfigured
       // in the main build method due to a modified AppState.
       _configuration = MapConfiguration(
         places: newPlaces,
-        selectedCategory:
-            Provider.of<AppState>(context, listen: false).selectedCategory,
+        selectedCategory: appState.selectedCategory,
       );
 
-      Provider.of<AppState>(context, listen: false).setPlaces(newPlaces);
+      appState.setPlaces(newPlaces);
     }
   }
 
@@ -472,19 +471,19 @@ class _AddPlaceButtonBar extends StatelessWidget {
           children: [
             ElevatedButton(
               style: ElevatedButton.styleFrom(primary: Colors.blue),
+              onPressed: onSavePressed,
               child: const Text(
                 'Save',
                 style: TextStyle(color: Colors.white, fontSize: 16.0),
               ),
-              onPressed: onSavePressed,
             ),
             ElevatedButton(
               style: ElevatedButton.styleFrom(primary: Colors.red),
+              onPressed: onCancelPressed,
               child: const Text(
                 'Cancel',
                 style: TextStyle(color: Colors.white, fontSize: 16.0),
               ),
-              onPressed: onCancelPressed,
             ),
           ],
         ),

place_tracker/pubspec.lock

@@ -82,7 +82,7 @@ packages:
       name: flutter_lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.1"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -155,7 +155,7 @@ packages:
       name: lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "2.0.0"
   matcher:
     dependency: transitive
     description:
@@ -295,5 +295,5 @@ packages:
     source: hosted
     version: "2.1.1"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
+  dart: ">=2.17.0-206.0.dev <3.0.0"
   flutter: ">=2.5.0"

place_tracker/pubspec.yaml

@@ -4,7 +4,7 @@ description: A new Flutter project.
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: ">=2.17.0-0 <3.0.0"
 
 dependencies:
   flutter:
@@ -19,7 +19,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  flutter_lints: ^1.0.0
+  flutter_lints: ^2.0.1
 
 flutter:
   assets: