onTrackballPositionChanging property
Occurs while the trackball position is changed. Here, you can customize the text of the trackball.
Widget build(BuildContext context) {
return Container(
child: SfCartesianChart(
trackballBehavior: TrackballBehavior(enable: true),
onTrackballPositionChanging: (TrackballArgs args) => trackball(args)
));
}
void trackball(TrackballArgs args) {
args.chartPointInfo = ChartPointInfo();
}
Implementation
final ChartTrackballCallback? onTrackballPositionChanging;