SliceData

The data class that constructs the Pie Slices in a Pie/Donut Chart.

Jumping back to our previous example, we provided two SliceData to show a PieChart containing two slices.

SliceData defines the pie piece in a PieChart. It also provides the radius of the Pie and styling options should you choose to customize each individual pie slices.

Let's modify the original PieChart example, and represent every Pie with a Different Radius.

Code Sample

...
import 'package:chart_it/chart_it.dart';

class TestPieCharts extends StatefulWidget {
  const TestPieCharts({Key? key}) : super(key: key);

  @override
  State<TestPieCharts> createState() => _TestPieChartsState();
}

class _TestPieChartsState extends State<TestPieCharts> {
  @override
  Widget build(BuildContext context) {
    return PieChart(
      data: PieSeries(
        slices: <SliceData>[
          SliceData(
            label: (_, value) => 'Quarter 1',
            style: SliceDataStyle(
              color: Colors.pink,
              radius: 90,
            ),
            value: 18,
          ),
          SliceData(
            label: (_, value) => 'Quarter 2',
            style: SliceDataStyle(
              color: Colors.orange,
              radius: 130,
            ),
            value: 32,
          ),
          SliceData(
            label: (_, value) => 'Quarter 3',
            style: SliceDataStyle(
              color: Colors.cyanAccent,
              radius: 100,
            ),
            value: 48,
          ),
          SliceData(
            label: (_, value) => 'Quarter 4',
            style: SliceDataStyle(
              color: Colors.blueAccent,
              radius: 110,
            ),
            value: 76,
          ),
        ],
      ),
    );
  }
}

Result

Even if you can provide custom radius for a pie slice, it won't exceed the max_radius limit which is calculated internally based on the Widget's Constraints.

Class Properties

Name	Type	Required	Default Value
value	num	true	-
style	SliceDataStyle?	false	null
label	SliceMapper?	false	null
labelStyle	ChartTextStyle?	false	null