Unexpected zooming and panning

[cfbeard]

The lines attached below seem to be causing some unexpected zoom and panning issues. When zooming in, the camera will automatically zoom back out or pan in a random direction.

https://github.com/utsmannn/osm-android-compose/blob/8513df0e09c2e5f13e17e15ce9581446ff3025de/osm-compose/src/main/java/com/utsman/osmandcompose/OpenStreetMap.kt#L130-L135

[sepehrpg]

I also have this problem‌ "When zooming in, the camera will automatically zoom back out or pan in a random direction."

[cvetyshayasiren]

I encountered this issue and after many attempts, found a temporary working solution.

Instead of:

val cameraState = rememberCameraState {
    geoPoint = GeoPoint(60.0, 30.0)
    zoom = 14.0
}

Use:

var cameraState by remember { 
    mutableStateOf(
        CameraState(
            CameraProperty(
                geoPoint = GeoPoint(60.0, 30.0), 
                zoom = 14.0
            )
        )
    )
}

LaunchedEffect(cameraState.zoom) {
    val zoom = cameraState.zoom
    val geoPoint = cameraState.geoPoint
    cameraState = CameraState(
        CameraProperty(
            geoPoint = geoPoint,
            zoom = zoom
        )
    )
}

The key is to catch the zoom change event and "recreate" the cameraState before this random drift occurs.