charts
Date Time Line Point Combo Chart Example
Example:
/// Example of a combo time series chart with two series rendered as lines, and
/// a third rendered as points along the top line with a different color.
///
/// This example demonstrates a method for drawing points along a line using a
/// different color from the main series color. The line renderer supports
/// drawing points with the "includePoints" option, but those points will share
/// the same color as the line.
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class DateTimeComboLinePointChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
DateTimeComboLinePointChart(this.seriesList, {this.animate});
/// Creates a [TimeSeriesChart] with sample data and no transition.
factory DateTimeComboLinePointChart.withSampleData() {
return new DateTimeComboLinePointChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.TimeSeriesChart(
seriesList,
animate: animate,
// Configure the default renderer as a line renderer. This will be used
// for any series that does not define a rendererIdKey.
//
// This is the default configuration, but is shown here for illustration.
defaultRenderer: new charts.LineRendererConfig(),
// Custom renderer configuration for the point series.
customSeriesRenderers: [
new charts.PointRendererConfig(
// ID used to link series to this renderer.
customRendererId: 'customPoint')
],
// Optionally pass in a [DateTimeFactory] used by the chart. The factory
// should create the same type of [DateTime] as the data provided. If none
// specified, the default creates local date time.
dateTimeFactory: const charts.LocalDateTimeFactory(),
);
}
/// Create one series with sample hard coded data.
static List<charts.Series<TimeSeriesSales, DateTime>> _createSampleData() {
final desktopSalesData = [
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),
];
final tableSalesData = [
new TimeSeriesSales(new DateTime(2017, 9, 19), 10),
new TimeSeriesSales(new DateTime(2017, 9, 26), 50),
new TimeSeriesSales(new DateTime(2017, 10, 3), 200),
new TimeSeriesSales(new DateTime(2017, 10, 10), 150),
];
final mobileSalesData = [
new TimeSeriesSales(new DateTime(2017, 9, 19), 10),
new TimeSeriesSales(new DateTime(2017, 9, 26), 50),
new TimeSeriesSales(new DateTime(2017, 10, 3), 200),
new TimeSeriesSales(new DateTime(2017, 10, 10), 150),
];
return [
new charts.Series<TimeSeriesSales, DateTime>(
id: 'Desktop',
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
domainFn: (TimeSeriesSales sales, _) => sales.time,
measureFn: (TimeSeriesSales sales, _) => sales.sales,
data: desktopSalesData,
),
new charts.Series<TimeSeriesSales, DateTime>(
id: 'Tablet',
colorFn: (_, __) => charts.MaterialPalette.red.shadeDefault,
domainFn: (TimeSeriesSales sales, _) => sales.time,
measureFn: (TimeSeriesSales sales, _) => sales.sales,
data: tableSalesData,
),
new charts.Series<TimeSeriesSales, DateTime>(
id: 'Mobile',
colorFn: (_, __) => charts.MaterialPalette.green.shadeDefault,
domainFn: (TimeSeriesSales sales, _) => sales.time,
measureFn: (TimeSeriesSales sales, _) => sales.sales,
data: mobileSalesData)
// Configure our custom point renderer for this series.
..setAttribute(charts.rendererIdKey, 'customPoint'),
];
}
}
/// Sample time series data type.
class TimeSeriesSales {
final DateTime time;
final int sales;
TimeSeriesSales(this.time, this.sales);
}