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.
117 lines
3.9 KiB
117 lines
3.9 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.
|
|
|
|
/// Time series chart with line annotation example
|
|
///
|
|
/// The example future range annotation extends beyond the range of the series
|
|
/// data, demonstrating the effect of the [Charts.RangeAnnotation.extendAxis]
|
|
/// flag. This can be set to false to disable range extension.
|
|
///
|
|
/// Additional annotations may be added simply by adding additional
|
|
/// [Charts.RangeAnnotationSegment] items to the list.
|
|
// 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 TimeSeriesLineAnnotationChart extends StatelessWidget {
|
|
final List<charts.Series<dynamic, DateTime>> seriesList;
|
|
final bool? animate;
|
|
|
|
const TimeSeriesLineAnnotationChart(this.seriesList, {this.animate, Key? key})
|
|
: super(key: key);
|
|
|
|
/// Creates a [TimeSeriesChart] with sample data and no transition.
|
|
factory TimeSeriesLineAnnotationChart.withSampleData() {
|
|
return TimeSeriesLineAnnotationChart(
|
|
_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 TimeSeriesLineAnnotationChart.withRandomData() {
|
|
return TimeSeriesLineAnnotationChart(_createRandomData());
|
|
}
|
|
|
|
/// Create random data.
|
|
static List<charts.Series<TimeSeriesSales, DateTime>> _createRandomData() {
|
|
final random = Random();
|
|
|
|
final data = [
|
|
TimeSeriesSales(DateTime(2017, 9, 19), random.nextInt(100)),
|
|
TimeSeriesSales(DateTime(2017, 9, 26), random.nextInt(100)),
|
|
TimeSeriesSales(DateTime(2017, 10, 3), random.nextInt(100)),
|
|
TimeSeriesSales(DateTime(2017, 10, 10), random.nextInt(100)),
|
|
];
|
|
|
|
return [
|
|
charts.Series<TimeSeriesSales, DateTime>(
|
|
id: 'Sales',
|
|
domainFn: (TimeSeriesSales sales, _) => sales.time,
|
|
measureFn: (TimeSeriesSales sales, _) => sales.sales,
|
|
data: data,
|
|
)
|
|
];
|
|
}
|
|
// EXCLUDE_FROM_GALLERY_DOCS_END
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return charts.TimeSeriesChart(seriesList, animate: animate, behaviors: [
|
|
charts.RangeAnnotation([
|
|
charts.LineAnnotationSegment(
|
|
DateTime(2017, 10, 4), charts.RangeAnnotationAxisType.domain,
|
|
startLabel: 'Oct 4'),
|
|
charts.LineAnnotationSegment(
|
|
DateTime(2017, 10, 15), charts.RangeAnnotationAxisType.domain,
|
|
endLabel: 'Oct 15'),
|
|
]),
|
|
]);
|
|
}
|
|
|
|
/// Create one series with sample hard coded data.
|
|
static List<charts.Series<TimeSeriesSales, DateTime>> _createSampleData() {
|
|
final data = [
|
|
TimeSeriesSales(DateTime(2017, 9, 19), 5),
|
|
TimeSeriesSales(DateTime(2017, 9, 26), 25),
|
|
TimeSeriesSales(DateTime(2017, 10, 3), 100),
|
|
TimeSeriesSales(DateTime(2017, 10, 10), 75),
|
|
];
|
|
|
|
return [
|
|
charts.Series<TimeSeriesSales, DateTime>(
|
|
id: 'Sales',
|
|
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);
|
|
}
|