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135 lines
4.5 KiB
135 lines
4.5 KiB
// 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 axis using statically provided ticks.
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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:flutter/material.dart';
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import 'package:charts_flutter/flutter.dart' as charts;
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/// Example of specifying a custom set of ticks to be used on the domain axis.
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///
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/// Specifying custom set of ticks allows specifying exactly what ticks are
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/// used in the axis. Each tick is also allowed to have a different style set.
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///
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/// For an ordinal axis, the [StaticOrdinalTickProviderSpec] is shown in this
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/// example defining ticks to be used with [TickSpec] of String.
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///
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/// For numeric axis, the [StaticNumericTickProviderSpec] can be used by passing
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/// in a list of ticks defined with [TickSpec] of num.
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///
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/// For datetime axis, the [StaticDateTimeTickProviderSpec] can be used by
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/// passing in a list of ticks defined with [TickSpec] of datetime.
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class StaticallyProvidedTicks extends StatelessWidget {
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final List<charts.Series> seriesList;
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final bool animate;
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StaticallyProvidedTicks(this.seriesList, {this.animate});
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factory StaticallyProvidedTicks.withSampleData() {
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return new StaticallyProvidedTicks(
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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 StaticallyProvidedTicks.withRandomData() {
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return new StaticallyProvidedTicks(_createRandomData());
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}
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/// Create random data.
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static List<charts.Series<OrdinalSales, String>> _createRandomData() {
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final random = new Random();
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final globalSalesData = [
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new OrdinalSales('2014', random.nextInt(100) * 100),
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new OrdinalSales('2015', random.nextInt(100) * 100),
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new OrdinalSales('2016', random.nextInt(100) * 100),
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new OrdinalSales('2017', random.nextInt(100) * 100),
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];
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return [
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new charts.Series<OrdinalSales, String>(
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id: 'Global Revenue',
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domainFn: (OrdinalSales sales, _) => sales.year,
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measureFn: (OrdinalSales sales, _) => sales.sales,
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data: globalSalesData,
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),
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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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// Create the ticks to be used the domain axis.
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final staticTicks = <charts.TickSpec<String>>[
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new charts.TickSpec(
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// Value must match the domain value.
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'2014',
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// Optional label for this tick, defaults to domain value if not set.
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label: 'Year 2014',
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// The styling for this tick.
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style: new charts.TextStyleSpec(
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color: new charts.Color(r: 0x4C, g: 0xAF, b: 0x50))),
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// If no text style is specified - the style from renderSpec will be used
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// if one is specified.
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new charts.TickSpec('2015'),
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new charts.TickSpec('2016'),
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new charts.TickSpec('2017'),
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];
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return new charts.BarChart(
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seriesList,
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animate: animate,
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domainAxis: new charts.OrdinalAxisSpec(
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tickProviderSpec:
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new charts.StaticOrdinalTickProviderSpec(staticTicks)),
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);
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}
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/// Create series list with single series
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static List<charts.Series<OrdinalSales, String>> _createSampleData() {
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final globalSalesData = [
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new OrdinalSales('2014', 5000),
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new OrdinalSales('2015', 25000),
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new OrdinalSales('2016', 100000),
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new OrdinalSales('2017', 750000),
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];
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return [
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new charts.Series<OrdinalSales, String>(
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id: 'Global Revenue',
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domainFn: (OrdinalSales sales, _) => sales.year,
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measureFn: (OrdinalSales sales, _) => sales.sales,
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data: globalSalesData,
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),
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];
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}
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}
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/// Sample ordinal data type.
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class OrdinalSales {
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final String year;
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final int sales;
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OrdinalSales(this.year, this.sales);
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}
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