feat: allow reassignment of MapController to FlutterMap multiple times (#1915)

Author: josxha

CHANGELOG.md

@@ -4,7 +4,7 @@ Please consider [donating](https://docs.fleaflet.dev/supporters#support-us) or [
 
 This CHANGELOG does not include every commit and/or PR - it is a hand picked selection of the most important ones. For a full list of changes, please check the GitHub repository releases/tags.
 
-## [7.0.2] - 2024/07/XX
+## [7.0.2] - 2024/07/02
 
 > Note that this version causes a technically breaking change by removing `PolygonLayer.useDynamicUpdate` & `PolylineLayer.useDynamicUpdate`, introduced in v7.0.1. However, the implementations for these was broken on introduction, and their intended purpose no longer exists. Therefore, these should not have been used in any capacity, and should not affect any projects.
 
@@ -13,6 +13,7 @@ Contains the following user-affecting bug fixes:
 - Fixed significant performance issues with `PolygonLayer` & `PolylineLayer` inadvertently introduced by v7.0.1 - [#1925](https://github.com/fleaflet/flutter_map/pull/1925) for [#1921](https://github.com/fleaflet/flutter_map/issues/1921)
 - Fixed bug where the holes of a `Polygon` would only appear if their winding direction was opposite to the direction of the `Polygon.points` - [#1925](https://github.com/fleaflet/flutter_map/pull/1925) for [#1924](https://github.com/fleaflet/flutter_map/issues/1924)
 - Relaxed constraint on 'package:logger' dependency - [#1922](https://github.com/fleaflet/flutter_map/pull/1922) for [#1916](https://github.com/fleaflet/flutter_map/issues/1916)
+- Allowed re-assignment of a `MapController` to a `FlutterMap` multiple times - [#1915](https://github.com/fleaflet/flutter_map/pull/1915) for [#1892](https://github.com/fleaflet/flutter_map/issues/1892)
 
 ## [7.0.1] - 2024/06/09
 

example/lib/pages/map_controller.dart

@@ -14,7 +14,10 @@ class MapControllerPage extends StatefulWidget {
 }
 
 class MapControllerPageState extends State<MapControllerPage> {
-  late final MapController _mapController;
+  /// This example uses a global MapController instance to test if the
+  /// controller can get applied to the map multiple times.
+  static final MapController _mapController = MapController();
+
   double _rotation = 0;
 
   static const _london = LatLng(51.5, -0.09);
@@ -42,12 +45,6 @@ class MapControllerPageState extends State<MapControllerPage> {
     ),
   ];
 
-  @override
-  void initState() {
-    super.initState();
-    _mapController = MapController();
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(

lib/src/map/controller/map_controller_impl.dart

@@ -16,7 +16,7 @@ class MapControllerImpl extends ValueNotifier<_MapControllerState>
     implements MapController {
   final _mapEventStreamController = StreamController<MapEvent>.broadcast();
 
-  late final MapInteractiveViewerState _interactiveViewerState;
+  late MapInteractiveViewerState _interactiveViewerState;
 
   Animation<LatLng>? _moveAnimation;
   Animation<double>? _zoomAnimation;
@@ -338,11 +338,6 @@ class MapControllerImpl extends ValueNotifier<_MapControllerState>
   }
 
   set options(MapOptions newOptions) {
-    assert(
-      newOptions != value.options,
-      'Should not update options unless they change',
-    );
-
     final newCamera = value.camera?.withOptions(newOptions) ??
         MapCamera.initialCamera(newOptions);