Creating New Layers

Creating a new map layer is just as easy as it is to create a normal StatelessWidget or StatefulWidget.
Only one method call is needed to 'connect' the widget to the map state: FlutterMapState.maybeOf(). This call does two important things:
  • Cause the widget/layer to rebuild automatically when required (if in the build method)
  • Expose the map's internal state, meaning that it's information (such as zoom) can be accessed
You can see an example of how this is done below:
class CustomLayer extends StatelessWidget {
const CustomLayer({super.key});
Widget build(BuildContext context) {
final mapState = FlutterMapState.of(context);
// Use `mapState` as necessary, for example `mapState.zoom`
Attempting to use the widget above outside of a FlutterMap widget will result in an error, due to the usage of FlutterMapState.of(context).
If creating a hybrid widget for usage outside of a layer, use the maybeOf method instead.
© flutter_map Authors & Maintainers