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