mapbox_widget_layer

!! May be unstable and have bad performance !! Custom Flutter Widgets on top of a Mapbox Map (package mapbox_gl). Exposes builders to reactively build widgets based on screen position, zoom, bearing, and tilt.

mapbox_widget_layer.mov

Heavily inspired by the example here: flutter-mapbox-gl/maps > custom markers

Usage

• Install mapbox_gl
• Create a new widget with a Stack widget that contains a MapboxMap and the MapboxWidgetLayer

There are three options for widget rendering:

1. MapboxItemBuilder – exposes all attributes to manually control rendering of the widget: screenPosition zoom, bearing, and tilt in a builder-closure to reactively build widgets according to the exposed attributes. Example usage:

       MapboxItemBuilder(
           builder: (context, screenPosition) {
               debugPrint('${screenPosition.screenPosition}');
               debugPrint('${screenPosition.zoom}');
               debugPrint('${screenPosition.bearing}');
               debugPrint('${screenPosition.tilt}');
               return Container(
                 height: 100,
                 width: 100,
                 color: Colors.blue[200],
                 child: const Center(child: Text('builder')),
               );
           },
           size: const Size(100, 100),
           coordinate: const LatLng(49.457647152564334, 11.076190602176172),
       ),

2. MapboxItem – does not expose options to customize rendering. Example usage:

       MapboxItem(
           child: Container(
               height: 100,
               width: 100,
               color: Colors.red[200],
               child: const Center(child: Text('item')),
           ),
           size: const Size(100, 100),
           coordinate: const LatLng(49.45800162760231, 11.076150534247994),
       ),

3. MapboxAutoTransformItem – auto-adjusts rendering, based on the zoom, bearing, and tilt. Allows for manual control of the zoomBase (zoom level at which the scale of the widget should match the size in pixels), and zoomExpFactor, which is the exponential base for the interpolation between zoom levels. Example usage:

       MapboxAutoTransformItem(
           child: Container(
               height: 100,
               width: 100,
               color: Colors.green[200],
               child: const Center(child: Text('auto')),
           ),
           size: const Size(100, 100),
           coordinate: const LatLng(49.45750295375467, 11.076125061775054),
       ),

Full example can be found in file ./example/main.dart HERE