charts
Bar Secondary Axis Only Axes Example
Example:
/// Bar chart example
import 'package:flutter/material.dart';
import 'package:charts_flutter/flutter.dart' as charts;
/// Example of using only a secondary axis (on the right) for a set of grouped
/// bars.
///
/// Both series plots using the secondary axis due to the measureAxisId of
/// secondaryMeasureAxisId.
///
/// Note: secondary may flip left and right positioning when
/// RTL.flipAxisLocations is set.
class BarChartWithSecondaryAxisOnly extends StatelessWidget {
static const secondaryMeasureAxisId = 'secondaryMeasureAxisId';
final List<charts.Series> seriesList;
final bool animate;
BarChartWithSecondaryAxisOnly(this.seriesList, {this.animate});
factory BarChartWithSecondaryAxisOnly.withSampleData() {
return new BarChartWithSecondaryAxisOnly(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.BarChart(
seriesList,
animate: animate,
);
}
/// Create series list with multiple series
static List<charts.Series<OrdinalSales, String>> _createSampleData() {
final globalSalesData = [
new OrdinalSales('2014', 500),
new OrdinalSales('2015', 2500),
new OrdinalSales('2016', 1000),
new OrdinalSales('2017', 7500),
];
return [
new charts.Series<OrdinalSales, String>(
id: 'Global Revenue',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: globalSalesData,
)
// Set series to use the secondary measure axis.
..setAttribute(charts.measureAxisIdKey, secondaryMeasureAxisId),
];
}
}
/// Sample ordinal data type.
class OrdinalSales {
final String year;
final int sales;
OrdinalSales(this.year, this.sales);
}