54 lines
1.5 KiB
Dart
54 lines
1.5 KiB
Dart
/// Donut chart example. This is a simple pie chart with a hole in the middle.
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import 'package:charts_flutter/flutter.dart' as charts;
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import 'package:flutter/material.dart';
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class DonutPieChart extends StatelessWidget {
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DonutPieChart(this.seriesList, {this.animate});
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/// Creates a [PieChart] with sample data and no transition.
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factory DonutPieChart.withSampleData() {
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return new DonutPieChart(
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_createSampleData(),
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animate: true,
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);
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}
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final List<charts.Series> seriesList;
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final bool animate;
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@override
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Widget build(BuildContext context) {
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return new charts.PieChart(seriesList,
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animate: animate,
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// Configure the width of the pie slices to 60px. The remaining space in
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// the chart will be left as a hole in the center.
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defaultRenderer: new charts.ArcRendererConfig(arcWidth: 60));
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}
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/// Create one series with sample hard coded data.
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static List<charts.Series<LinearSales, int>> _createSampleData() {
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final data = [
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new LinearSales(0, 100),
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new LinearSales(1, 75),
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new LinearSales(2, 25),
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new LinearSales(3, 5),
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];
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return [
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new charts.Series<LinearSales, int>(
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id: 'Sales',
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domainFn: (LinearSales sales, _) => sales.year,
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measureFn: (LinearSales sales, _) => sales.sales,
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data: data,
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)
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];
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}
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}
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/// Sample linear data type.
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class LinearSales {
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LinearSales(this.year, this.sales);
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final int year;
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final int sales;
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}
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