[improvement] Zoom listener feature

[tranquoctrungcntt]

How can I know when user zoom the map? thanks

[ibosev]

in MapOptions there is a onPositionChanged callback function. I think this is what you are looking for.

[maRci002]

#719 - MapController has mapEventStream.

  @override
  void initState() {
    super.initState();
    mapController = MapController();

    subscription = mapController.mapEventStream.listen(onMapEvent);
  }

  void onMapEvent(MapEvent mapEvent) {
    if (mapEvent is MapEventWithMove) {
      if (mapEvent.source == MapEventSource.onDrag ||
          mapEvent.source == MapEventSource.onMultiFinger ||
          mapEvent.source == MapEventSource.doubleTapZoomAnimationController) {
        if (mapEvent.targetZoom != mapEvent.zoom) {
          // zoom changed
        }
      }
    }
  }