137 lines
4.9 KiB
Dart
137 lines
4.9 KiB
Dart
/// Example of a scatter plot chart with a bucketing measure axis and a legend.
|
|
///
|
|
/// A bucketing measure axis positions all values beneath a certain threshold
|
|
/// into a reserved space on the axis range. The label for the bucket line will
|
|
/// be drawn in the middle of the bucket range, rather than aligned with the
|
|
/// gridline for that value's position on the scale.
|
|
import 'package:charts_flutter/flutter.dart' as charts;
|
|
import 'package:flutter/material.dart';
|
|
|
|
class BucketingAxisScatterPlotChart extends StatelessWidget {
|
|
|
|
BucketingAxisScatterPlotChart(this.seriesList, {this.animate});
|
|
|
|
/// Creates a [ScatterPlotChart] with sample data and no transition.
|
|
factory BucketingAxisScatterPlotChart.withSampleData() {
|
|
return new BucketingAxisScatterPlotChart(
|
|
_createSampleData(),
|
|
// Disable animations for image tests.
|
|
animate: false,
|
|
);
|
|
}
|
|
|
|
final List<charts.Series> seriesList;
|
|
final bool animate;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return new charts.ScatterPlotChart(seriesList,
|
|
// Set up a bucketing axis that will place all values below 0.1 (10%)
|
|
// into a bucket at the bottom of the chart.
|
|
//
|
|
// Configure a tick count of 3 so that we get 100%, 50%, and the
|
|
// threshold.
|
|
primaryMeasureAxis: new charts.BucketingAxisSpec(
|
|
threshold: 0.1,
|
|
tickProviderSpec: new charts.BucketingNumericTickProviderSpec(
|
|
desiredTickCount: 3)),
|
|
// Add a series legend to display the series names.
|
|
behaviors: [
|
|
new charts.SeriesLegend(position: charts.BehaviorPosition.end),
|
|
],
|
|
animate: animate);
|
|
}
|
|
|
|
/// Create one series with sample hard coded data.
|
|
static List<charts.Series<LinearSales, int>> _createSampleData() {
|
|
final myFakeDesktopData = [
|
|
new LinearSales(52, 0.75, 14.0),
|
|
];
|
|
|
|
final myFakeTabletData = [
|
|
new LinearSales(45, 0.3, 18.0),
|
|
];
|
|
|
|
final myFakeMobileData = [
|
|
new LinearSales(56, 0.8, 17.0),
|
|
];
|
|
|
|
final myFakeChromebookData = [
|
|
new LinearSales(25, 0.6, 13.0),
|
|
];
|
|
|
|
final myFakeHomeData = [
|
|
new LinearSales(34, 0.5, 15.0),
|
|
];
|
|
|
|
final myFakeOtherData = [
|
|
new LinearSales(10, 0.25, 15.0),
|
|
new LinearSales(12, 0.075, 14.0),
|
|
new LinearSales(13, 0.225, 15.0),
|
|
new LinearSales(16, 0.03, 14.0),
|
|
new LinearSales(24, 0.04, 13.0),
|
|
new LinearSales(37, 0.1, 14.5),
|
|
];
|
|
|
|
return [
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Cheese',
|
|
colorFn: (LinearSales sales, _) =>
|
|
charts.MaterialPalette.blue.shadeDefault,
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.revenueShare,
|
|
radiusPxFn: (LinearSales sales, _) => sales.radius,
|
|
data: myFakeDesktopData),
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Carrots',
|
|
colorFn: (LinearSales sales, _) =>
|
|
charts.MaterialPalette.red.shadeDefault,
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.revenueShare,
|
|
radiusPxFn: (LinearSales sales, _) => sales.radius,
|
|
data: myFakeTabletData),
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Cucumbers',
|
|
colorFn: (LinearSales sales, _) =>
|
|
charts.MaterialPalette.green.shadeDefault,
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.revenueShare,
|
|
radiusPxFn: (LinearSales sales, _) => sales.radius,
|
|
data: myFakeMobileData),
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Crayons',
|
|
colorFn: (LinearSales sales, _) =>
|
|
charts.MaterialPalette.purple.shadeDefault,
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.revenueShare,
|
|
radiusPxFn: (LinearSales sales, _) => sales.radius,
|
|
data: myFakeChromebookData),
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Celery',
|
|
colorFn: (LinearSales sales, _) =>
|
|
charts.MaterialPalette.indigo.shadeDefault,
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.revenueShare,
|
|
radiusPxFn: (LinearSales sales, _) => sales.radius,
|
|
data: myFakeHomeData),
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Cauliflower',
|
|
colorFn: (LinearSales sales, _) =>
|
|
charts.MaterialPalette.gray.shadeDefault,
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.revenueShare,
|
|
radiusPxFn: (LinearSales sales, _) => sales.radius,
|
|
data: myFakeOtherData),
|
|
];
|
|
}
|
|
}
|
|
|
|
/// Sample linear data type.
|
|
class LinearSales {
|
|
LinearSales(this.year, this.revenueShare, this.radius);
|
|
|
|
final int year;
|
|
final double revenueShare;
|
|
final double radius;
|
|
}
|