charts
Grouped Target Line Bar Chart Example
Example:
/// Bar chart example
import 'package:flutter/material.dart';
import 'package:charts_flutter/flutter.dart' as charts;
class GroupedBarTargetLineChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
GroupedBarTargetLineChart(this.seriesList, {this.animate});
factory GroupedBarTargetLineChart.withSampleData() {
return new GroupedBarTargetLineChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.BarChart(seriesList,
animate: animate,
barGroupingType: charts.BarGroupingType.grouped,
customSeriesRenderers: [
new charts.BarTargetLineRendererConfig<String>(
// ID used to link series to this renderer.
customRendererId: 'customTargetLine',
groupingType: 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 tableSalesData = [
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),
];
final desktopTargetLineData = [
new OrdinalSales('2014', 4),
new OrdinalSales('2015', 20),
new OrdinalSales('2016', 80),
new OrdinalSales('2017', 65),
];
final tableTargetLineData = [
new OrdinalSales('2014', 30),
new OrdinalSales('2015', 55),
new OrdinalSales('2016', 15),
new OrdinalSales('2017', 25),
];
final mobileTargetLineData = [
new OrdinalSales('2014', 10),
new OrdinalSales('2015', 5),
new OrdinalSales('2016', 45),
new OrdinalSales('2017', 35),
];
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: tableSalesData,
),
new charts.Series<OrdinalSales, String>(
id: 'Mobile',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: mobileSalesData,
),
new charts.Series<OrdinalSales, String>(
id: 'Desktop Target Line',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: desktopTargetLineData,
)
// Configure our custom bar target renderer for this series.
..setAttribute(charts.rendererIdKey, 'customTargetLine'),
new charts.Series<OrdinalSales, String>(
id: 'Tablet Target Line',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: tableTargetLineData,
)
// Configure our custom bar target renderer for this series.
..setAttribute(charts.rendererIdKey, 'customTargetLine'),
new charts.Series<OrdinalSales, String>(
id: 'Mobile Target Line',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: mobileTargetLineData,
)
// Configure our custom bar target renderer for this series.
..setAttribute(charts.rendererIdKey, 'customTargetLine'),
];
}
}
/// Sample ordinal data type.
class OrdinalSales {
final String year;
final int sales;
OrdinalSales(this.year, this.sales);
}