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295 lines
13 KiB
295 lines
13 KiB
6 years ago
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// Copyright 2018 the Charts project authors. Please see the AUTHORS file
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// for details.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/// Example of timeseries chart with annotation rows between the chart draw area
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/// and the domain axis.
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///
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/// The symbol annotation renderer draws a row of symbols for each series below
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/// the drawArea but above the bottom axis.
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///
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/// This renderer can draw point annotations and range annotations. Point
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/// annotations are drawn at the location of the domain along the chart's domain
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/// axis, in the row for its series. Range annotations are drawn as a range
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/// shape between the domainLowerBound and domainUpperBound positions along the
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/// chart's domain axis. Point annotations are drawn on top of range
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/// annotations.
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// EXCLUDE_FROM_GALLERY_DOCS_START
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import 'dart:math';
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// EXCLUDE_FROM_GALLERY_DOCS_END
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import 'package:charts_flutter/flutter.dart' as charts;
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import 'package:flutter_web/material.dart';
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class TimeSeriesSymbolAnnotationChart extends StatelessWidget {
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final List<charts.Series> seriesList;
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final bool animate;
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TimeSeriesSymbolAnnotationChart(this.seriesList, {this.animate});
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/// Creates a [TimeSeriesChart] with sample data and no transition.
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factory TimeSeriesSymbolAnnotationChart.withSampleData() {
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return new TimeSeriesSymbolAnnotationChart(
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_createSampleData(),
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// Disable animations for image tests.
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animate: false,
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);
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}
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// EXCLUDE_FROM_GALLERY_DOCS_START
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// This section is excluded from being copied to the gallery.
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// It is used for creating random series data to demonstrate animation in
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// the example app only.
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factory TimeSeriesSymbolAnnotationChart.withRandomData() {
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return new TimeSeriesSymbolAnnotationChart(_createRandomData());
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}
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/// Create random data.
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static List<charts.Series<TimeSeriesSales, DateTime>> _createRandomData() {
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final random = new Random();
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final myDesktopData = [
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 19), sales: random.nextInt(100)),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 26), sales: random.nextInt(100)),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 10, 3), sales: random.nextInt(100)),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 10, 10), sales: random.nextInt(100)),
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];
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final myTabletData = [
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 19), sales: random.nextInt(100)),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 26), sales: random.nextInt(100)),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 10, 3), sales: random.nextInt(100)),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 10, 10), sales: random.nextInt(100)),
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];
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// Example of a series with two range annotations. A regular point shape
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// will be drawn at the current domain value, and a range shape will be
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// drawn between the previous and target domain values.
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//
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// Note that these series do not contain any measure values. They are
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// positioned automatically in rows.
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final myAnnotationDataTop = [
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 24),
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timePrevious: new DateTime(2017, 9, 19),
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timeTarget: new DateTime(2017, 9, 24),
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),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 29),
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timePrevious: new DateTime(2017, 9, 29),
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timeTarget: new DateTime(2017, 10, 4),
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),
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];
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// Example of a series with one range annotation and two single point
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// annotations. Omitting the previous and target domain values causes that
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// datum to be drawn as a single point.
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final myAnnotationDataBottom = [
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 25),
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timePrevious: new DateTime(2017, 9, 21),
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timeTarget: new DateTime(2017, 9, 25),
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),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 9, 31)),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 10, 5)),
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];
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return [
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Desktop',
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colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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measureFn: (TimeSeriesSales sales, _) => sales.sales,
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data: myDesktopData,
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),
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Tablet',
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colorFn: (_, __) => charts.MaterialPalette.green.shadeDefault,
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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measureFn: (TimeSeriesSales sales, _) => sales.sales,
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data: myTabletData,
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),
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Annotation Series 1',
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colorFn: (_, __) => charts.MaterialPalette.gray.shadeDefault,
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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domainLowerBoundFn: (TimeSeriesSales row, _) => row.timePrevious,
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domainUpperBoundFn: (TimeSeriesSales row, _) => row.timeTarget,
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// No measure values are needed for symbol annotations.
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measureFn: (_, __) => null,
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data: myAnnotationDataTop,
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)
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// Configure our custom symbol annotation renderer for this series.
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..setAttribute(charts.rendererIdKey, 'customSymbolAnnotation')
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// Optional radius for the annotation shape. If not specified, this will
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// default to the same radius as the points.
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..setAttribute(charts.boundsLineRadiusPxKey, 3.5),
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Annotation Series 2',
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colorFn: (_, __) => charts.MaterialPalette.red.shadeDefault,
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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domainLowerBoundFn: (TimeSeriesSales row, _) => row.timePrevious,
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domainUpperBoundFn: (TimeSeriesSales row, _) => row.timeTarget,
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// No measure values are needed for symbol annotations.
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measureFn: (_, __) => null,
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data: myAnnotationDataBottom,
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)
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// Configure our custom symbol annotation renderer for this series.
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..setAttribute(charts.rendererIdKey, 'customSymbolAnnotation')
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// Optional radius for the annotation shape. If not specified, this will
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// default to the same radius as the points.
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..setAttribute(charts.boundsLineRadiusPxKey, 3.5),
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];
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}
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// EXCLUDE_FROM_GALLERY_DOCS_END
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@override
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Widget build(BuildContext context) {
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return new charts.TimeSeriesChart(
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seriesList,
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animate: animate,
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// Custom renderer configuration for the point series.
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customSeriesRenderers: [
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new charts.SymbolAnnotationRendererConfig(
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// ID used to link series to this renderer.
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customRendererId: 'customSymbolAnnotation')
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],
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// Optionally pass in a [DateTimeFactory] used by the chart. The factory
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// should create the same type of [DateTime] as the data provided. If none
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// specified, the default creates local date time.
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dateTimeFactory: const charts.LocalDateTimeFactory(),
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);
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}
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/// Create one series with sample hard coded data.
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static List<charts.Series<TimeSeriesSales, DateTime>> _createSampleData() {
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final myDesktopData = [
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 9, 19), sales: 5),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 9, 26), sales: 25),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 10, 3), sales: 100),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 10, 10), sales: 75),
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];
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final myTabletData = [
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 9, 19), sales: 10),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 9, 26), sales: 50),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 10, 3), sales: 200),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 10, 10), sales: 150),
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];
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// Example of a series with two range annotations. A regular point shape
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// will be drawn at the current domain value, and a range shape will be
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// drawn between the previous and target domain values.
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//
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// Note that these series do not contain any measure values. They are
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// positioned automatically in rows.
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final myAnnotationDataTop = [
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 24),
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timePrevious: new DateTime(2017, 9, 19),
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timeTarget: new DateTime(2017, 9, 24),
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),
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 29),
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timePrevious: new DateTime(2017, 9, 29),
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timeTarget: new DateTime(2017, 10, 4),
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),
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];
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// Example of a series with one range annotation and two single point
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// annotations. Omitting the previous and target domain values causes that
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// datum to be drawn as a single point.
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final myAnnotationDataBottom = [
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new TimeSeriesSales(
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timeCurrent: new DateTime(2017, 9, 25),
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timePrevious: new DateTime(2017, 9, 21),
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timeTarget: new DateTime(2017, 9, 25),
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),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 9, 31)),
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new TimeSeriesSales(timeCurrent: new DateTime(2017, 10, 5)),
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];
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return [
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Desktop',
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colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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measureFn: (TimeSeriesSales sales, _) => sales.sales,
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data: myDesktopData,
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),
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Tablet',
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colorFn: (_, __) => charts.MaterialPalette.green.shadeDefault,
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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measureFn: (TimeSeriesSales sales, _) => sales.sales,
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data: myTabletData,
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),
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Annotation Series 1',
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colorFn: (_, __) => charts.MaterialPalette.gray.shadeDefault,
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// A point shape will be drawn at the location of the domain.
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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// A range shape will be drawn between the lower and upper domain
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// bounds. The range will be drawn underneath the domain point.
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domainLowerBoundFn: (TimeSeriesSales row, _) => row.timePrevious,
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domainUpperBoundFn: (TimeSeriesSales row, _) => row.timeTarget,
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// No measure values are needed for symbol annotations.
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measureFn: (_, __) => null,
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data: myAnnotationDataTop,
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)
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// Configure our custom symbol annotation renderer for this series.
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..setAttribute(charts.rendererIdKey, 'customSymbolAnnotation')
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// Optional radius for the annotation range. If not specified, this will
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// default to the same radius as the domain point.
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..setAttribute(charts.boundsLineRadiusPxKey, 3.5),
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new charts.Series<TimeSeriesSales, DateTime>(
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id: 'Annotation Series 2',
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colorFn: (_, __) => charts.MaterialPalette.red.shadeDefault,
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// A point shape will be drawn at the location of the domain.
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domainFn: (TimeSeriesSales sales, _) => sales.timeCurrent,
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// A range shape will be drawn between the lower and upper domain
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// bounds. The range will be drawn underneath the domain point.
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domainLowerBoundFn: (TimeSeriesSales row, _) => row.timePrevious,
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domainUpperBoundFn: (TimeSeriesSales row, _) => row.timeTarget,
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// No measure values are needed for symbol annotations.
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measureFn: (_, __) => null,
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data: myAnnotationDataBottom,
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)
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// Configure our custom symbol annotation renderer for this series.
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..setAttribute(charts.rendererIdKey, 'customSymbolAnnotation')
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// Optional radius for the annotation range. If not specified, this will
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// default to the same radius as the domain point.
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..setAttribute(charts.boundsLineRadiusPxKey, 3.5),
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];
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}
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}
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/// Sample time series data type.
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class TimeSeriesSales {
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final DateTime timeCurrent;
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final DateTime timePrevious;
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final DateTime timeTarget;
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final int sales;
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TimeSeriesSales(
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{this.timeCurrent, this.timePrevious, this.timeTarget, this.sales});
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}
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