charts
Rtl Bar Chart i18n Example
Example:
/// RTL Bar chart example
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class RTLBarChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
RTLBarChart(this.seriesList, {this.animate});
/// Creates a [BarChart] with sample data and no transition.
factory RTLBarChart.withSampleData() {
return new RTLBarChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
// Charts will determine if RTL is enabled by checking the directionality by
// requesting Directionality.of(context). This returns the text direction
// from the closest instance of that encloses the context passed to build
// the chart. A [TextDirection.rtl] will be treated as a RTL chart. This
// means that the directionality widget does not have to directly wrap each
// chart. It is show here as an example only.
//
// By default, when a chart detects RTL:
// Measure axis positions are flipped. Primary measure axis is on the right
// and the secondary measure axis is on the left (when used).
// Domain axis' first domain starts on the right and grows left.
//
// Optionally, [RTLSpec] can be passed in when creating the chart to specify
// chart display settings in RTL mode.
return new Directionality(
textDirection: TextDirection.rtl,
child: new charts.BarChart(
seriesList,
animate: animate,
vertical: false,
));
}
/// Create one series with sample hard coded data.
static List<charts.Series<OrdinalSales, String>> _createSampleData() {
final data = [
new OrdinalSales('2014', 5),
new OrdinalSales('2015', 25),
new OrdinalSales('2016', 100),
new OrdinalSales('2017', 75),
];
return [
new charts.Series<OrdinalSales, String>(
id: 'Sales',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: data,
)
];
}
}
/// Sample ordinal data type.
class OrdinalSales {
final String year;
final int sales;
OrdinalSales(this.year, this.sales);
}