MapShapeSource.memory constructor

const MapShapeSource.memory(Uint8List bytes, { String? shapeDataField, int dataCount = 0, IndexedStringValueMapper? primaryValueMapper, List<MapColorMapper>? shapeColorMappers, List<MapColorMapper>? bubbleColorMappers, IndexedStringValueMapper? dataLabelMapper, IndexedDoubleValueMapper? bubbleSizeMapper, IndexedColorValueMapper? shapeColorValueMapper, IndexedColorValueMapper? bubbleColorValueMapper, })

Creates a layer using the GeoJSON source as bytes from Uint8List.

late MapShapeSource _mapSource;

@override
void initState() {
  _mapSource = MapShapeSource.memory(
    bytes,
    shapeDataField: 'name'
  );
}

@override
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: Text('Memory sample'),
    ),
    body: Center(
        child: SfMaps(
      layers: [
        MapShapeLayer(
         source: _mapSource,
          showDataLabels: true,
          color: Colors.orange[100],
        ),
      ],
    )),
  );
}

Implementation

const MapShapeSource.memory(
  Uint8List bytes, {
  this.shapeDataField,
  this.dataCount = 0,
  this.primaryValueMapper,
  this.shapeColorMappers,
  this.bubbleColorMappers,
  this.dataLabelMapper,
  this.bubbleSizeMapper,
  this.shapeColorValueMapper,
  this.bubbleColorValueMapper,
}) : _path = bytes,
     _type = GeoJSONSourceType.memory,
     assert(
       (primaryValueMapper != null && dataCount > 0) ||
           primaryValueMapper == null,
     ),
     assert(
       (shapeColorMappers != null &&
               primaryValueMapper != null &&
               shapeColorValueMapper != null) ||
           shapeColorMappers == null,
     ),
     assert(
       (bubbleColorMappers != null &&
               primaryValueMapper != null &&
               bubbleColorValueMapper != null) ||
           bubbleColorMappers == null,
     );