mirror of https://github.com/flutter/samples.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
112 lines
3.4 KiB
112 lines
3.4 KiB
// 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:charts_flutter/flutter.dart' as charts;
|
|
import 'package:flutter/material.dart';
|
|
|
|
class CustomRoundedBars extends StatelessWidget {
|
|
final List<charts.Series> seriesList;
|
|
final bool animate;
|
|
|
|
const CustomRoundedBars(this.seriesList, {this.animate, Key key})
|
|
: super(key: key);
|
|
|
|
/// Creates a [BarChart] with custom rounded bars.
|
|
factory CustomRoundedBars.withSampleData() {
|
|
return CustomRoundedBars(
|
|
_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 CustomRoundedBars.withRandomData() {
|
|
return CustomRoundedBars(_createRandomData());
|
|
}
|
|
|
|
/// Create random data.
|
|
static List<charts.Series<OrdinalSales, String>> _createRandomData() {
|
|
final random = Random();
|
|
|
|
final data = [
|
|
OrdinalSales('2014', random.nextInt(100)),
|
|
OrdinalSales('2015', random.nextInt(100)),
|
|
OrdinalSales('2016', random.nextInt(100)),
|
|
OrdinalSales('2017', random.nextInt(100)),
|
|
];
|
|
|
|
return [
|
|
charts.Series<OrdinalSales, String>(
|
|
id: 'Sales',
|
|
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
|
|
domainFn: (OrdinalSales sales, _) => sales.year,
|
|
measureFn: (OrdinalSales sales, _) => sales.sales,
|
|
data: data,
|
|
)
|
|
];
|
|
}
|
|
// EXCLUDE_FROM_GALLERY_DOCS_END
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return charts.BarChart(
|
|
seriesList,
|
|
animate: animate,
|
|
defaultRenderer: charts.BarRendererConfig(
|
|
// By default, bar renderer will draw rounded bars with a constant
|
|
// radius of 30.
|
|
// To not have any rounded corners, use [NoCornerStrategy]
|
|
// To change the radius of the bars, use [ConstCornerStrategy]
|
|
cornerStrategy: const charts.ConstCornerStrategy(30)),
|
|
);
|
|
}
|
|
|
|
/// Create one series with sample hard coded data.
|
|
static List<charts.Series<OrdinalSales, String>> _createSampleData() {
|
|
final data = [
|
|
OrdinalSales('2014', 5),
|
|
OrdinalSales('2015', 25),
|
|
OrdinalSales('2016', 100),
|
|
OrdinalSales('2017', 75),
|
|
];
|
|
|
|
return [
|
|
charts.Series<OrdinalSales, String>(
|
|
id: 'Sales',
|
|
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
|
|
domainFn: (OrdinalSales sales, _) => sales.year,
|
|
measureFn: (OrdinalSales sales, _) => sales.sales,
|
|
data: data,
|
|
)
|
|
];
|
|
}
|
|
}
|
|
|
|
/// Sample ordinal data type.
|
|
class OrdinalSales {
|
|
final String year;
|
|
final int sales;
|
|
|
|
OrdinalSales(this.year, this.sales);
|
|
}
|