guillaumeducret / sterna

Moving map for Flutter

sterna

Moving map for Flutter. This project is not stable yet. API may change.

Features

• Moving map tailored for navigation apps
• Camera animation
• Camera focal alignment
• Asynchronous marker resolution when map bounds change
• Auto zoom to fit markers
• Implemented with RenderObject to optimise performance.
• Plain dart code with no dependencies. Supports Android, IOS and Web.

Usage

SternaMap(
  controller: MapController(initialCameraFocal: Latlng(45.6391, 5.8800)),
  children: <Widget>[
    TileLayer(
      delegate: RasterTileLayerChildDelegate.osm(),
    ),
    Layer(children: <Widget>[
      Marker(center: Latlng(45.6391, 5.8800)),
    ]),
    MarkerLayer(
      delegate: MarkerLayerChildResolverDelegate(
        resolver: (bounds) async => BuilderBundle<Latlng>(
          iterable: [Latlng(45.6391, 5.9769)].where(bounds.contains),
          builder: (_, latlng) => Marker(
            key: ValueKey(latlng),
            center: latlng,
          ),
        ),
      ),
    ),
  ],
);