Ejemplo 1: gráfico de líneas en flutter
/// Example of a simple line chart.
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class SimpleLineChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
SimpleLineChart(this.seriesList, {this.animate});
/// Creates a [LineChart] with sample data and no transition.
factory SimpleLineChart.withSampleData() {
return new SimpleLineChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.LineChart(seriesList, animate: animate);
}
/// Create one series with sample hard coded data.
static List<charts.Series<LinearSales, int>> _createSampleData() {
final data = [
new LinearSales(0, 5),
new LinearSales(1, 25),
new LinearSales(2, 100),
new LinearSales(3, 75),
];
return [
new charts.Series<LinearSales, int>(
id: 'Sales',
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
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);
}
Ejemplo 2: gráfico lineal en flutter
/// Timeseries chart example
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class SimpleTimeSeriesChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
SimpleTimeSeriesChart(this.seriesList, {this.animate});
/// Creates a [TimeSeriesChart] with sample data and no transition.
factory SimpleTimeSeriesChart.withSampleData() {
return new SimpleTimeSeriesChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
@override
Widget build(BuildContext context) {
return new charts.TimeSeriesChart(
seriesList,
animate: animate,
// 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 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);
}
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