onTrendlineRender property

ChartTrendlineRenderCallback? onTrendlineRender
final

Occurs when the trendline is rendered. Here, you can get the legend’s text, shape, series index, and point index of circular series.

Widget build(BuildContext context) {
   return Container(
       child: SfCartesianChart(
           onTrendlineRender: (TrendlineRenderArgs args) => trendline(args)
       ));
}
void trendline(TrendlineRenderArgs args) {
  args.seriesIndex = 2;
}

Implementation

final ChartTrendlineRenderCallback? onTrendlineRender;