Change corner radius in curved CornerStyle in (Syncfusion) Doughnut Chart - flutter

Question

I am using syncfusion Pie charts in flutter. I want know know if there is a way to change the scale of the chart inside the parent container without change parent size,
and how to change the radius of the corner when the CornerStyle value is bothCurved
this is my code:
class HalfDoughnutChart extends StatelessWidget {
final List<ChartData> chartData = [
ChartData('David', 30, Color.fromRGBO(9, 0, 136, 1)),
ChartData('Mark', 38, Color.fromRGBO(147, 0, 119, 1)),
ChartData('Test', 34, Color.fromRGBO(228, 0, 124, 1)),
ChartData('Test', 52, Color.fromRGBO(255, 189, 57, 1))
];
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
color: Colors.grey,
height: 250,
width: 500,
child: SfCircularChart(
margin: EdgeInsets.all(0),
legend: Legend(isVisible: true,position: LegendPosition.right),
annotations: <CircularChartAnnotation>[
CircularChartAnnotation(
widget:
Container(
child: const Text('Annotation')
), radius: '2%',
verticalAlignment: ChartAlignment.far,
),
],
series: <CircularSeries>[
DoughnutSeries<ChartData, String>(
dataLabelMapper: (ChartData data, _) => "${data.y.toInt()} %",
dataSource: chartData,
enableSmartLabels: true,
xValueMapper: (ChartData data, _) => data.x,
yValueMapper: (ChartData data, _) => data.y,
pointColorMapper: (ChartData data, _) => data.color,
radius: '70%',
innerRadius: '65%',
startAngle: 270, // Starting angle of doughnut
endAngle: 90,
dataLabelSettings: DataLabelSettings(
// Renders the data label
isVisible: true
),
// Corner style of doughnut segment
cornerStyle: CornerStyle.bothCurve)
]))));
}
}
class ChartData {
ChartData(this.x, this.y, [this.color]);
final String x;
final double y;
final Color color;
}
find chart image in below link:
https://ibb.co/r7MjNBB
thank you

Answer 1

Thanks for the interest in our Flutter charts widget. We have analyzed your queries and find the responses below.
Query #1 Is there a way to change the scale of the chart inside the parent container without change the parent size.
You can use the radius property to customize the size of the chart without changing its parent size. To know more about our charts, please refer to the help document.
Query #2 How to change the radius of the corner when the CornerStyle value is bothCurved?
As of now, you are unable to change the corner radius of each point however you can customize the corner style using the enum property cornerStyle. To know more about rounded corners, find the user guide.
Kindly revert us if you need any further assistance.
Thanks,
Dharanitharan. P