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