selectionGesture property

ActivationMode selectionGesture

Gesture for activating the selection.

Selection can be activated in ActivationMode.none, ActivationMode.singleTap, ActivationMode.doubleTap, and ActivationMode.longPress.

Defaults to ActivationMode.singleTap.

Also refer ActivationMode.

SelectionBehavior _selectionBehavior;

void initState() {
  _selectionBehavior = SelectionBehavior(enable: true);
  super.initState();
}

Widget build(BuildContext context) {
   return Container(
       child: SfCircularChart(
           selectionGesture: ActivationMode.singleTap,
           series: <PieSeries<ChartData, String>>[
               PieSeries<ChartData, String>(
                 selectionBehavior: _selectionBehavior
               ),
             ],
       )
   );
}

Implementation

final ActivationMode selectionGesture;