60 lines
1.8 KiB
Dart
60 lines
1.8 KiB
Dart
/// Timeseries chart example
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import 'package:charts_flutter/flutter.dart' as charts;
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import 'package:flutter/material.dart';
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class SimpleTimeSeriesChart extends StatelessWidget {
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SimpleTimeSeriesChart(this.seriesList, {this.animate});
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/// Creates a [TimeSeriesChart] with sample data and no transition.
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factory SimpleTimeSeriesChart.withSampleData() {
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return new SimpleTimeSeriesChart(
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_createSampleData(),
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// Disable animations for image tests.
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animate: true,
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);
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}
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final List<charts.Series> seriesList;
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final bool animate;
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@override
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Widget build(BuildContext context) {
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return new charts.TimeSeriesChart(
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seriesList,
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animate: animate,
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// Optionally pass in a [DateTimeFactory] used by the chart. The factory
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// should create the same type of [DateTime] as the data provided. If none
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// specified, the default creates local date time.
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dateTimeFactory: const charts.LocalDateTimeFactory(),
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);
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}
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/// Create one series with sample hard coded data.
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static List<charts.Series<TimeSeriesSales, DateTime>> _createSampleData() {
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final data = [
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new TimeSeriesSales(new DateTime(2017, 9, 19), 5),
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new TimeSeriesSales(new DateTime(2017, 9, 26), 25),
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new TimeSeriesSales(new DateTime(2017, 10, 3), 100),
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new TimeSeriesSales(new DateTime(2017, 10, 10), 75),
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];
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return [
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Sales',
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colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
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domainFn: (TimeSeriesSales sales, _) => sales.time,
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measureFn: (TimeSeriesSales sales, _) => sales.sales,
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data: data,
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)
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];
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}
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}
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/// Sample time series data type.
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class TimeSeriesSales {
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TimeSeriesSales(this.time, this.sales);
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final DateTime time;
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final int sales;
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}
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