charts
Grouped Stacked Bar Chart Example
Example:
/// Example of a bar chart with grouped, stacked series oriented vertically.
import 'package:flutter/material.dart';
import 'package:charts_flutter/flutter.dart' as charts;
class GroupedStackedBarChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
GroupedStackedBarChart(this.seriesList, {this.animate});
factory GroupedStackedBarChart.withSampleData() {
return new GroupedStackedBarChart(
createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.BarChart(
seriesList,
animate: animate,
barGroupingType: charts.BarGroupingType.groupedStacked,
);
}
/// Create series list with multiple series
static List<charts.Series<OrdinalSales, String>> createSampleData() {
final desktopSalesDataA = [
new OrdinalSales('2014', 5),
new OrdinalSales('2015', 25),
new OrdinalSales('2016', 100),
new OrdinalSales('2017', 75),
];
final tableSalesDataA = [
new OrdinalSales('2014', 25),
new OrdinalSales('2015', 50),
new OrdinalSales('2016', 10),
new OrdinalSales('2017', 20),
];
final mobileSalesDataA = [
new OrdinalSales('2014', 10),
new OrdinalSales('2015', 15),
new OrdinalSales('2016', 50),
new OrdinalSales('2017', 45),
];
final desktopSalesDataB = [
new OrdinalSales('2014', 5),
new OrdinalSales('2015', 25),
new OrdinalSales('2016', 100),
new OrdinalSales('2017', 75),
];
final tableSalesDataB = [
new OrdinalSales('2014', 25),
new OrdinalSales('2015', 50),
new OrdinalSales('2016', 10),
new OrdinalSales('2017', 20),
];
final mobileSalesDataB = [
new OrdinalSales('2014', 10),
new OrdinalSales('2015', 15),
new OrdinalSales('2016', 50),
new OrdinalSales('2017', 45),
];
return [
new charts.Series<OrdinalSales, String>(
id: 'Desktop A',
seriesCategory: 'A',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: desktopSalesDataA,
),
new charts.Series<OrdinalSales, String>(
id: 'Tablet A',
seriesCategory: 'A',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: tableSalesDataA,
),
new charts.Series<OrdinalSales, String>(
id: 'Mobile A',
seriesCategory: 'A',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: mobileSalesDataA,
),
new charts.Series<OrdinalSales, String>(
id: 'Desktop B',
seriesCategory: 'B',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: desktopSalesDataB,
),
new charts.Series<OrdinalSales, String>(
id: 'Tablet B',
seriesCategory: 'B',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: tableSalesDataB,
),
new charts.Series<OrdinalSales, String>(
id: 'Mobile B',
seriesCategory: 'B',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: mobileSalesDataB,
),
];
}
}
/// Sample ordinal data type.
class OrdinalSales {
final String year;
final int sales;
OrdinalSales(this.year, this.sales);
}