buildViewWithConfiguration method

@override Widget buildViewWithConfiguration(int creationId, PlatformViewCreatedCallback onPlatformViewCreated, { required MapWidgetConfiguration widgetConfiguration, MapObjects mapObjects = const MapObjects(), MapConfiguration mapConfiguration = const MapConfiguration(), })

Returns a widget displaying the map view.

Implementation

@override
Widget buildViewWithConfiguration(
  int creationId,
  PlatformViewCreatedCallback onPlatformViewCreated, {
  required MapWidgetConfiguration widgetConfiguration,
  MapObjects mapObjects = const MapObjects(),
  MapConfiguration mapConfiguration = const MapConfiguration(),
}) {
  // Bail fast if we've already rendered this map ID...
  if (_mapById[creationId]?.widget != null) {
    return _mapById[creationId]!.widget!;
  }

  final controller = StreamController<MapEvent<Object?>>.broadcast();

  final mapController = GoogleMapController(
    mapId: creationId,
    streamController: controller,
    widgetConfiguration: widgetConfiguration,
    mapObjects: mapObjects,
    mapConfiguration: mapConfiguration,
  )..init(); // Initialize the controller

  _mapById[creationId] = mapController;

  mapController.events.whereType<WebMapReadyEvent>().first.then((
    WebMapReadyEvent event,
  ) {
    assert(
      creationId == event.mapId,
      'Received WebMapReadyEvent for the wrong map',
    );
    // Notify the plugin now that there's a fully initialized controller.
    onPlatformViewCreated.call(event.mapId);
  });

  assert(
    mapController.widget != null,
    'The widget of a GoogleMapController cannot be null before calling dispose on it.',
  );

  return mapController.widget!;
}