React-native-mapbox-gl: [v6] onRegionDidChange fires with animated=false on every call to render()

[butchmarshall]

It looks like v6 did not fix the animated property issue with onRegionDidChange.

onRegionDidChange seems to fire after every call to the render() view.

I have a RE-CENTER button on the screen which works just like google maps which shows when the user drags the map, and hides and sets userTrackingMode=true when clicked.

1. Drag the screen while in userTrackingMode=true, i use handleRegionDidChange, and check that !region.animated
2. I set setTrackingMode=false via setState
3. Call to render() to draw the RE-CENTER button
4. User clicks RE-CENTER button
5. this._map.easeTo to animate to over the user
6. call to setState to hide the RE-CENTER button
7. handleRegionDidChange is called again (because of the redraw) and !region.animated === true, thus re-showing the RE-CENTER button again

[butchmarshall]

I attempted to use PanResponder to try and implement my own drag-detection on the parent view, but <MapboxGL.MapView> seems to somehow override it?

[kaynz]

That's the issue I wanted to describe in #782.

[kristfal]

Hey,

I think the biggest issue here is that you guys are are trying to work around a lack APIs in the SDK. There are two underlying issues that I think needs to be resolved:

1) We need to be able to track the state of trackingMode, and the behavior of these need to be normalized across iOS and Android (#699)
2) We need to be able to track the state of the map through regionDidChanage or a similar event that also notifies if the change is user initialized or activated through other means such as geolocation updates (#697)

Until those two issues are resolved, I don't see any proper way of handing the state of user tracking as we cant use the PanResponder nor wrap the map in a touchable view since the map view will capture all touch events.

[Tennen]

not the same issue, but I also want to use PanResponder
MapView in a scrollview on android behave strange when scrolling the map..event stops propagation when the way you scroll is not enough horizontal..
does anyone facing a similar problem?

[nitaliano]

Closing this out region change is now throttled to 500 ms and is not fired until the camera is idle, it's currently in master will be in 6.0.2