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117 lines
3.7 KiB
117 lines
3.7 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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/// Custom Tick Style Example
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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 using a custom primary measure axis replacing the default
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/// gridline rendering with a short tick rendering. It also turns on the axis
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/// line so that the ticks have something to line up against.
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///
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/// There are many axis styling options in the SmallTickRenderer allowing you
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/// to customize the font, tick lengths, and offsets.
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class ShortTickLengthAxis extends StatelessWidget {
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final List<charts.Series> seriesList;
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final bool animate;
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const ShortTickLengthAxis(this.seriesList, {this.animate, Key key})
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: super(key: key);
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factory ShortTickLengthAxis.withSampleData() {
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return ShortTickLengthAxis(
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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 ShortTickLengthAxis.withRandomData() {
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return ShortTickLengthAxis(_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 = Random();
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final globalSalesData = [
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OrdinalSales('2014', random.nextInt(100) * 100),
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OrdinalSales('2015', random.nextInt(100) * 100),
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OrdinalSales('2016', random.nextInt(100) * 100),
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OrdinalSales('2017', random.nextInt(100) * 100),
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];
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return [
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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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return charts.BarChart(
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seriesList,
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animate: animate,
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/// Customize the primary measure axis using a small tick renderer.
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/// Note: use String instead of num for ordinal domain axis
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/// (typically bar charts).
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primaryMeasureAxis: const charts.NumericAxisSpec(
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renderSpec: charts.SmallTickRendererSpec(
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// Tick and Label styling here.
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)),
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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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OrdinalSales('2014', 5000),
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OrdinalSales('2015', 25000),
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OrdinalSales('2016', 100000),
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OrdinalSales('2017', 750000),
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];
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return [
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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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