charts
Custom Rounded Bars Bar Chart Example
Example:
/// Bar chart example
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class CustomRoundedBars extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
CustomRoundedBars(this.seriesList, {this.animate});
/// Creates a [BarChart] with custom rounded bars.
factory CustomRoundedBars.withSampleData() {
return new CustomRoundedBars(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.BarChart(
seriesList,
animate: animate,
defaultRenderer: new charts.BarRendererConfig(
// By default, bar renderer will draw rounded bars with a constant
// radius of 100.
// To not have any rounded corners, use [NoCornerStrategy]
// To change the radius of the bars, use [ConstCornerStrategy]
cornerStrategy: const charts.ConstCornerStrategy(30)),
);
}
/// 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',
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
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);
}