onDataLabelRender property Null safety

ChartDataLabelRenderCallback? onDataLabelRender
final

Occurs when tapping the axis label. Here, you can get the appropriate axis that is tapped and the axis label text.

Widget build(BuildContext context) {
   return Container(
       child: SfCartesianChart(
           onDataLabelRender: (DataLabelRenderArgs args) => dataLabel(args),
       ));
}
void dataLabel(DataLabelRenderArgs args) {
  args.text = 'data Label';
}

Implementation

final ChartDataLabelRenderCallback? onDataLabelRender;