How to always scale around a fixed point (center of the map)

Question

I'm creating an application where the user can select a location ( like in this example : https://docs.mapbox.com/android/maps/examples/location-picker/ ).

How to change the behavior of the standardScaleGestureDetector to make it always scale around a fixed point (like the center of the map) ?

I suppose that their is a relation with the focalPoint, but I don't know how to make it fixed.

I found a relative subject on github : https://github.com/mapbox/mapbox-gl-native/issues/4151

Answer 1

You can provide your own focal point with mapboxMap.getUiSettings().setFocalPoint(customPoint), the map gesture detector will use this point instead of the center of the gesture.