color property Null safety

Color color
final

Specifies the color applies to the shape or bubble based on the value.

late List<Model> _data;
late MapShapeSource _mapSource;

 @override
 void initState() {
   super.initState();

   _data = <Model>[
    Model('India', 280, "Low"),
    Model('United States of America', 190, "High"),
    Model('Pakistan', 37, "Low"),
   ];

   _mapSource = MapShapeSource.asset(
     "assets/world_map.json",
     shapeDataField: "name",
     dataCount: _data.length,
     primaryValueMapper: (int index) {
       return _data[index].country;
     },
     shapeColorValueMapper: (int index) {
        return _data[index].storage;
     },
     shapeColorMappers: [
        MapColorMapper(value: "Low", color: Colors.red),
        MapColorMapper(value: "High", color: Colors.green)
     ],
   );
 }

 @override
 Widget build(BuildContext context) {
   return SfMaps(
     layers: [
       MapShapeLayer(
         source: _mapSource,
       )
     ],
   );
 }

class Model {
 const Model(this.country, this.count, this.storage);

 final String country;
 final double count;
 final String storage;
}

See also:

Implementation

final Color color;