crosshairBehavior property

Customizes the crosshair in chart.

late CrosshairBehavior _crosshairBehavior;

@override
void initState() {
  _crosshairBehavior = CrosshairBehavior(enable: true);
  super.initState();
 }

 Widget build(BuildContext context) {
    return Container(
        child: SfCartesianChart(
            crosshairBehavior: _crosshairBehavior,
         )
     );
}