charts
Measure Axis Label Alignment Axes Example
Example:
/// Custom Tick Label Alignment Example
import 'package:flutter/material.dart';
import 'package:charts_flutter/flutter.dart' as charts;
/// Example of using a custom primary measure replacing the renderSpec with one
/// that aligns the text under the tick and left justifies.
class MeasureAxisLabelAlignment extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
MeasureAxisLabelAlignment(this.seriesList, {this.animate});
factory MeasureAxisLabelAlignment.withSampleData() {
return new MeasureAxisLabelAlignment(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.BarChart(
seriesList,
animate: animate,
/// Customize the primary measure axis using a small tick renderer.
/// Use String instead of num for ordinal domain axis
/// (typically bar charts).
primaryMeasureAxis: new charts.NumericAxisSpec(
renderSpec: new charts.GridlineRendererSpec(
// Display the measure axis labels below the gridline.
//
// 'Before' & 'after' follow the axis value direction.
// Vertical axes draw 'before' below & 'after' above the tick.
// Horizontal axes draw 'before' left & 'after' right the tick.
labelAnchor: charts.TickLabelAnchor.before,
// Left justify the text in the axis.
//
// Note: outside means that the secondary measure axis would right
// justify.
labelJustification: charts.TickLabelJustification.outside,
)),
);
}
/// Create series list with single series
static List<charts.Series<OrdinalSales, String>> _createSampleData() {
final globalSalesData = [
new OrdinalSales('2014', 5000),
new OrdinalSales('2015', 25000),
new OrdinalSales('2016', 100000),
new OrdinalSales('2017', 750000),
];
return [
new charts.Series<OrdinalSales, String>(
id: 'Global Revenue',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: globalSalesData,
),
];
}
}
/// Sample ordinal data type.
class OrdinalSales {
final String year;
final int sales;
OrdinalSales(this.year, this.sales);
}