81 lines
2.1 KiB
Dart
81 lines
2.1 KiB
Dart
/// Bar chart example
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import 'package:flutter/material.dart';
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import 'package:charts_flutter/flutter.dart' as charts;
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class GroupedBarChart extends StatelessWidget {
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GroupedBarChart(this.seriesList, {this.animate});
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factory GroupedBarChart.withSampleData() {
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return new GroupedBarChart(
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_createSampleData(),
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// Disable animations for image tests.
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animate: false,
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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.BarChart(
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seriesList,
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animate: animate,
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barGroupingType: charts.BarGroupingType.grouped,
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);
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}
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/// Create series list with multiple series
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static List<charts.Series<OrdinalSales, String>> _createSampleData() {
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final desktopSalesData = [
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new OrdinalSales('2014', 5),
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new OrdinalSales('2015', 25),
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new OrdinalSales('2016', 100),
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new OrdinalSales('2017', 75),
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];
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final tabletSalesData = [
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new OrdinalSales('2014', 25),
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new OrdinalSales('2015', 50),
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new OrdinalSales('2016', 10),
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new OrdinalSales('2017', 20),
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];
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final mobileSalesData = [
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new OrdinalSales('2014', 10),
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new OrdinalSales('2015', 15),
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new OrdinalSales('2016', 50),
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new OrdinalSales('2017', 45),
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];
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return [
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new charts.Series<OrdinalSales, String>(
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id: 'Desktop',
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domainFn: (OrdinalSales sales, _) => sales.year,
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measureFn: (OrdinalSales sales, _) => sales.sales,
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data: desktopSalesData,
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),
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new charts.Series<OrdinalSales, String>(
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id: 'Tablet',
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domainFn: (OrdinalSales sales, _) => sales.year,
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measureFn: (OrdinalSales sales, _) => sales.sales,
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data: tabletSalesData,
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),
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new charts.Series<OrdinalSales, String>(
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id: 'Mobile',
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domainFn: (OrdinalSales sales, _) => sales.year,
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measureFn: (OrdinalSales sales, _) => sales.sales,
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data: mobileSalesData,
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),
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];
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}
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}
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/// Sample ordinal data type.
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class OrdinalSales {
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OrdinalSales(this.year, this.sales);
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final String year;
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final int sales;
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}
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