GaugeAnnotation class

RadialAxis allows to add widgets such as text and image as an annotation to a specific point of interest in the radial gauge.

GaugeAnnotation provides options to add any image, text or other widget over a gauge widget with respect to angle or axisValue. Display the current progress or pointer value inside the gauge using a text widget annotation.

Widget build(BuildContext context) {
   return Container(
       child: SfRadialGauge(
         axes:<RadialAxis>[RadialAxis(
           annotations: <GaugeAnnotation>[
           GaugeAnnotation(widget: Text('Annotation'))
           ]
           )]
       ));
}