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samples/web/charts/lib/bar_chart/grouped_single_target_line....

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// Copyright 2018 the Charts project authors. Please see the AUTHORS file
// for details.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/// Bar chart example
// EXCLUDE_FROM_GALLERY_DOCS_START
import 'dart:math';
// EXCLUDE_FROM_GALLERY_DOCS_END
import 'package:flutter/material.dart';
import 'package:charts_flutter/flutter.dart' as charts;
class GroupedBarSingleTargetLineChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
GroupedBarSingleTargetLineChart(this.seriesList, {this.animate});
factory GroupedBarSingleTargetLineChart.withSampleData() {
return new GroupedBarSingleTargetLineChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
// EXCLUDE_FROM_GALLERY_DOCS_START
// This section is excluded from being copied to the gallery.
// It is used for creating random series data to demonstrate animation in
// the example app only.
factory GroupedBarSingleTargetLineChart.withRandomData() {
return new GroupedBarSingleTargetLineChart(_createRandomData());
}
/// Create random data.
static List<charts.Series<OrdinalSales, String>> _createRandomData() {
final random = new Random();
final desktopSalesData = [
new OrdinalSales('2014', random.nextInt(100)),
new OrdinalSales('2015', random.nextInt(100)),
new OrdinalSales('2016', random.nextInt(100)),
new OrdinalSales('2017', random.nextInt(100)),
];
final tableSalesData = [
new OrdinalSales('2014', random.nextInt(100)),
new OrdinalSales('2015', random.nextInt(100)),
new OrdinalSales('2016', random.nextInt(100)),
new OrdinalSales('2017', random.nextInt(100)),
];
final mobileSalesData = [
new OrdinalSales('2014', random.nextInt(100)),
new OrdinalSales('2015', random.nextInt(100)),
new OrdinalSales('2016', random.nextInt(100)),
new OrdinalSales('2017', random.nextInt(100)),
];
final targetLineData = [
new OrdinalSales('2014', random.nextInt(100)),
new OrdinalSales('2015', random.nextInt(100)),
new OrdinalSales('2016', random.nextInt(100)),
new OrdinalSales('2017', random.nextInt(100)),
];
return [
new charts.Series<OrdinalSales, String>(
id: 'Desktop',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: desktopSalesData),
new charts.Series<OrdinalSales, String>(
id: 'Tablet',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: tableSalesData),
new charts.Series<OrdinalSales, String>(
id: 'Mobile',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: mobileSalesData),
new charts.Series<OrdinalSales, String>(
id: 'Desktop Target Line',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: targetLineData)
// Configure our custom bar target renderer for this series.
..setAttribute(charts.rendererIdKey, 'customTargetLine'),
];
}
// EXCLUDE_FROM_GALLERY_DOCS_END
@override
Widget build(BuildContext context) {
return new charts.BarChart(seriesList,
animate: animate,
barGroupingType: charts.BarGroupingType.grouped,
customSeriesRenderers: [
new charts.BarTargetLineRendererConfig(
// ID used to link series to this renderer.
customRendererId: 'customTargetLine',
groupingType: charts.BarGroupingType.grouped)
]);
}
/// Create series list with multiple series
static List<charts.Series<OrdinalSales, String>> _createSampleData() {
final desktopSalesData = [
new OrdinalSales('2014', 5),
new OrdinalSales('2015', 25),
new OrdinalSales('2016', 100),
new OrdinalSales('2017', 75),
];
final tableSalesData = [
new OrdinalSales('2014', 25),
new OrdinalSales('2015', 50),
new OrdinalSales('2016', 10),
new OrdinalSales('2017', 20),
];
final mobileSalesData = [
new OrdinalSales('2014', 10),
new OrdinalSales('2015', 15),
new OrdinalSales('2016', 50),
new OrdinalSales('2017', 45),
];
final targetLineData = [
new OrdinalSales('2014', 30),
new OrdinalSales('2015', 55),
new OrdinalSales('2016', 15),
new OrdinalSales('2017', 25),
];
return [
new charts.Series<OrdinalSales, String>(
id: 'Desktop',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: desktopSalesData),
new charts.Series<OrdinalSales, String>(
id: 'Tablet',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: tableSalesData),
new charts.Series<OrdinalSales, String>(
id: 'Mobile',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: mobileSalesData),
new charts.Series<OrdinalSales, String>(
id: 'Desktop Target Line',
domainFn: (OrdinalSales sales, _) => sales.year,
measureFn: (OrdinalSales sales, _) => sales.sales,
data: targetLineData)
// Configure our custom bar target renderer for this series.
..setAttribute(charts.rendererIdKey, 'customTargetLine'),
];
}
}
/// Sample ordinal data type.
class OrdinalSales {
final String year;
final int sales;
OrdinalSales(this.year, this.sales);
}