Custom Widget data changed refresh widget

I'm currently developing custom map widget, and struggling with updating map with new data.

I put my code of custom widget, but in summary, function flow will be

initState() => load data and start to draw markers

_loadMarkerIcons() => load icons bitmap before get markers(async)

_createMarkers() => get markers with my icons

_updateMarkers() => set state, start creating markers

build() => build map!

When I change data from page, it will just rebuild the widget. Since init will never called again, data will never changed. Usually in other projects(which I can code), I will call _loadMarkerIcons() directly from outside when data changed, but cannot find any solution like that in flutterflow.

Is there any way to solve this? 🥲

class _MapSampleState extends State<MapSample> {
  Completer<google_maps_flutter.GoogleMapController> _controller = Completer();
  Map<String, google_maps_flutter.BitmapDescriptor> _customIcons = {};
  Set<google_maps_flutter.Marker> _markers = {};
  String imgurl = "asstspath";

  google_maps_flutter.LatLng _center =
      google_maps_flutter.LatLng(36.088110, -115.176468);

  void _onMapCreated(google_maps_flutter.GoogleMapController controller) {
    _controller.complete(controller);
  }

  @override
  void initState() {
    super.initState();
    _loadMarkerIcons();
    _center = google_maps_flutter.LatLng(widget.centerLat, widget.centerLng);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: google_maps_flutter.GoogleMap(
        onMapCreated: _onMapCreated,
        zoomGesturesEnabled: widget.allowZoom ?? false,
        zoomControlsEnabled: widget.showZoomControls ?? false,
        myLocationEnabled: widget.showLocation ?? false,
        compassEnabled: widget.showCompass ?? false,
        mapToolbarEnabled: widget.showMapToolbar ?? false,
        trafficEnabled: widget.showTraffic ?? false,
        initialCameraPosition: google_maps_flutter.CameraPosition(
          target: _center,
          zoom: 13.0,
        ),
        markers: _markers,
      ),
    );
  }

  Future<void> _loadMarkerIcons() async {
    Set<String> uniqueIconPaths =
        widget.mapData?.map((data) => data.icon).toSet() ??
            {}; // Extract unique icon paths

    for (String path in uniqueIconPaths) {
      if (path.isNotEmpty) {
        google_maps_flutter.BitmapDescriptor descriptor =
            await google_maps_flutter.BitmapDescriptor.fromAssetImage(
          ImageConfiguration(devicePixelRatio: 2.5),
          "${imgurl}/${path}",
        );
        _customIcons[path] = descriptor;
      }
    }

    _updateMarkers(); // Update markers once icons are loaded
  }

  void _updateMarkers() {
    setState(() {
        _markers = _createMarkers();
    });
  }

  Set<google_maps_flutter.Marker> _createMarkers() {
    var tmp = <google_maps_flutter.Marker>{};
    widget.mapData?.forEach((mapData) {
      final latlng.LatLng coordinates = mapData.latLng as latlng.LatLng;
      final google_maps_flutter.LatLng googleMapsLatLng =
          google_maps_flutter.LatLng(
              coordinates.latitude, coordinates.longitude);

      google_maps_flutter.BitmapDescriptor icon = _customIcons[mapData.icon] ??
          google_maps_flutter.BitmapDescriptor.defaultMarker;

      // Create and add the marker
      final google_maps_flutter.Marker marker = google_maps_flutter.Marker(
        markerId: google_maps_flutter.MarkerId(mapData.name),
        position: googleMapsLatLng,
        icon: icon,
        infoWindow: google_maps_flutter.InfoWindow(title: mapData.name),
      );

      tmp.add(marker);
    });
    return tmp;
  }
}