borderWidth property

double borderWidth
final

Specifies the knob border width in logical pixel.

Defaults to 0.

Widget build(BuildContext context) {
   return Container(
       child: SfRadialGauge(
         axes:<RadialAxis>[RadialAxis
         ( pointers: <GaugePointer>[
            NeedlePointer(
                 knobStyle: KnobStyle(borderWidth: 2,
                 borderColor : Colors.red),
          )])]
       ));
}

Implementation

final double borderWidth;