Ability to change rotation on ClusterItem

[cwsiteplan]

I do show labels on the map which should follow the camera bearing (map rotation). Similar to street names in GoogleMap - they rotate with the map.

by only exposing clusterItemContent we are not able to change the rotation of the Marker.

Applying the rotation on the composable content

clusterItemContent = {
            MyLabel(
                it.label,
                modifier = Modifier.rotate(rotation)
            )
        }

does not work as it then exceeds the bounds of the rendered marker - see below:

[cwsiteplan]

would be nice if someone can take a look at this

[kikoso]

Hi @cwsiteplan . I think this could probably be solved using the function marker.rotation(float value), but there is no easy access to it. It would also require changes on android-maps-utils.

The DefaultClusterRenderer provides a function to be overridden, onClusterItemUpdated. This function receives a marker that could potentially be modified.

How to pass this all the way-up it is an open question. Custom Renderers can now be created, so an option could be to override it (similar to this sample in the android-maps-utils) and provide an option to rotate the marker. That could theoretically work, but we would also need to somehow keep the relationship about which markers get which rotation.

[cwsiteplan]

already tried to set the rotation in onClusterItemUpdated but that would basically just apply an "offset" to the rotation and the marker would be rotated with the map. i want the text to keep being "pinned" to the polylines, like street-names. already tried to achieve that by adding the camera bearing as well. but couldn't make it work.

i've pushed a sample here: https://github.com/googlemaps/android-maps-compose/compare/main...cwsiteplan:android-maps-compose:bug/cluster-marker-rotation?expand=1

the rotation does not work all the time see attached video https://github.com/user-attachments/assets/940af8fb-1245-482a-a1cb-7d62550b20f4