Draw polygone on map & solve some warnings

lib/custom_marker_info_window.dart

@@ -10,7 +10,7 @@ class CustomMarkerInfoWindow extends StatefulWidget {
 }
 
 class _CustomMarkerInfoWindowState extends State<CustomMarkerInfoWindow> {
-  CustomInfoWindowController _customInfoWindowController =
+  final CustomInfoWindowController _customInfoWindowController =
       CustomInfoWindowController();
 
   final List<Marker> _markers = <Marker>[];

lib/custom_marker_screen.dart

@@ -8,7 +8,7 @@ class CustomMarkerScreen extends StatefulWidget {
   const CustomMarkerScreen({Key? key}) : super(key: key);
 
   @override
-  _CustomMarkerScreenState createState() => _CustomMarkerScreenState();
+  State<CustomMarkerScreen> createState() => _CustomMarkerScreenState();
 }
 
 class _CustomMarkerScreenState extends State<CustomMarkerScreen> {

lib/google_places_api.dart

@@ -13,7 +13,7 @@ class GooglePlacesApiScreen extends StatefulWidget {
 }
 
 class _GooglePlacesApiScreenState extends State<GooglePlacesApiScreen> {
-  TextEditingController _controller = TextEditingController();
+  final TextEditingController _controller = TextEditingController();
 
   var uuid = const Uuid();
 

lib/main.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'custom_marker_info_window.dart';
+import 'package:google_map/polygone_screen.dart';
 
 void main() {
   runApp(const MyApp());
@@ -16,7 +16,7 @@ class MyApp extends StatelessWidget {
       theme: ThemeData(
         primarySwatch: Colors.blue,
       ),
-      home: const CustomMarkerInfoWindow(),
+      home: const PolygoneScreen(),
     );
   }
 }

lib/polygone_screen.dart

@@ -0,0 +1,67 @@
+import 'dart:async';
+import 'dart:collection';
+
+import 'package:flutter/material.dart';
+import 'package:google_maps_flutter/google_maps_flutter.dart';
+
+class PolygoneScreen extends StatefulWidget {
+  const PolygoneScreen({super.key});
+
+  @override
+  State<PolygoneScreen> createState() => _PolygoneScreenState();
+}
+
+class _PolygoneScreenState extends State<PolygoneScreen> {
+  final Completer<GoogleMapController> _controller = Completer();
+
+  static const CameraPosition _kGooglePlex = CameraPosition(
+    target: LatLng(33.654235, 73.073000),
+    zoom: 14,
+  );
+  final Set<Marker> _markers = {};
+  final Set<Polygon> _polygone = HashSet<Polygon>();
+
+  List<LatLng> points = [
+    const LatLng(33.654235, 73.073000),
+    const LatLng(33.647326, 72.820175),
+    const LatLng(33.689531, 72.763160),
+    const LatLng(34.131452, 72.662334),
+    const LatLng(33.654235, 73.073000),
+  ];
+
+  void _setPolygone() {
+    _polygone.add(Polygon(
+        polygonId: const PolygonId('1'),
+        points: points,
+        strokeColor: Colors.deepOrange,
+        strokeWidth: 5,
+        fillColor: Colors.deepOrange.withOpacity(0.1),
+        geodesic: true));
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    _setPolygone();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Polygone'),
+      ),
+      body: GoogleMap(
+        mapType: MapType.normal,
+        initialCameraPosition: _kGooglePlex,
+        myLocationButtonEnabled: true,
+        myLocationEnabled: false,
+        markers: _markers,
+        polygons: _polygone,
+        onMapCreated: (GoogleMapController controller) {
+          _controller.complete(controller);
+        },
+      ),
+    );
+  }
+}