dataSource property Null safety

List<T> dataSource
final

Data required for rendering the series.

If no data source is specified, empty chart will be rendered without series.

Defaults to null.

Widget build(BuildContext context) {
  return SfCartesianChart(
    series: <ColumnSeries<SalesData, num>>[
      ColumnSeries<SalesData, num>(
        dataSource: chartData,
        xValueMapper: (SalesData sales, _) => sales.x,
        yValueMapper: (SalesData sales, _) => sales.y,
      ),
    ],
  );
}
final List<SalesData> chartData = <SalesData>[
  SalesData(1, 23),
  SalesData(2, 35),
  SalesData(3, 19)
];

class SalesData {
  SalesData(this.x, this.y);
    final double x;
    final double y;
}

Implementation

@override
final List<T> dataSource;