charts
Simple Datum Legend Legends Example
Example:
/// Bar chart with series legend example
import 'package:flutter/material.dart';
import 'package:charts_flutter/flutter.dart' as charts;
class SimpleDatumLegend extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
SimpleDatumLegend(this.seriesList, {this.animate});
factory SimpleDatumLegend.withSampleData() {
return new SimpleDatumLegend(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.PieChart(
seriesList,
animate: animate,
// Add the series legend behavior to the chart to turn on series legends.
// By default the legend will display above the chart.
behaviors: [new charts.DatumLegend()],
);
}
/// Create series list with one series
static List<charts.Series<LinearSales, int>> _createSampleData() {
final data = [
new LinearSales(0, 100),
new LinearSales(1, 75),
new LinearSales(2, 25),
new LinearSales(3, 5),
];
return [
new charts.Series<LinearSales, int>(
id: 'Sales',
domainFn: (LinearSales sales, _) => sales.year,
measureFn: (LinearSales sales, _) => sales.sales,
data: data,
)
];
}
}
/// Sample linear data type.
class LinearSales {
final int year;
final int sales;
LinearSales(this.year, this.sales);
}