charts
End Points Axis Time Series Charts Example
Example:
/// Example of a time series chart with an end points domain axis.
///
/// An end points axis generates two ticks, one at each end of the axis range.
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class EndPointsAxisTimeSeriesChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
EndPointsAxisTimeSeriesChart(this.seriesList, {this.animate});
/// Creates a [TimeSeriesChart] with sample data and no transition.
factory EndPointsAxisTimeSeriesChart.withSampleData() {
return new EndPointsAxisTimeSeriesChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.TimeSeriesChart(
seriesList,
animate: animate,
// Configures an axis spec that is configured to render one tick at each
// end of the axis range, anchored "inside" the axis. The start tick label
// will be left-aligned with its tick mark, and the end tick label will be
// right-aligned with its tick mark.
domainAxis: new charts.EndPointsTimeAxisSpec(),
);
}
/// Create one series with sample hard coded data.
static List<charts.Series<TimeSeriesSales, DateTime>> _createSampleData() {
final data = [
new TimeSeriesSales(new DateTime(2017, 9, 19), 5),
new TimeSeriesSales(new DateTime(2017, 9, 26), 25),
new TimeSeriesSales(new DateTime(2017, 10, 3), 100),
new TimeSeriesSales(new DateTime(2017, 10, 10), 75),
];
return [
new charts.Series<TimeSeriesSales, DateTime>(
id: 'Sales',
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
domainFn: (TimeSeriesSales sales, _) => sales.time,
measureFn: (TimeSeriesSales sales, _) => sales.sales,
data: data,
)
];
}
}
/// Sample time series data type.
class TimeSeriesSales {
final DateTime time;
final int sales;
TimeSeriesSales(this.time, this.sales);
}