computeBounds function

Implementation

CameraTargetBounds? computeBounds(
    List? locations, MapItem Function(dynamic) mapDataAdapter) {
  CameraTargetBounds? targetBounds;

  double? leastLat = double.infinity;
  double? greatestLat = double.negativeInfinity;
  double? leastLong = double.infinity;
  double? greatestLong = double.negativeInfinity;

  if (locations != null && locations.isNotEmpty) {
    for (final item in locations) {
      MapItem location = mapDataAdapter(item);
      if (location.latitude < leastLat!) {
        leastLat = location.latitude;
      }
      if (location.latitude > greatestLat!) {
        greatestLat = location.latitude;
      }
      if (location.longitude < leastLong!) {
        leastLong = location.longitude;
      }
      if (location.longitude > greatestLong!) {
        greatestLong = location.longitude;
      }
    }

    double offset = locations.length > 1 ? MapsConstants.mapPinOffset : 0;

    LatLngBounds bounds = LatLngBounds(
        southwest: LatLng(leastLat! - offset, leastLong! - offset),
        northeast: LatLng(greatestLat! + offset, greatestLong! + offset));
    targetBounds = CameraTargetBounds(bounds);
  }

  return targetBounds;
}