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117 lines
3.6 KiB
117 lines
3.6 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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/// RTL Line chart 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:charts_flutter/flutter.dart' as charts;
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import 'package:flutter/material.dart';
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class RTLLineChart extends StatelessWidget {
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final List<charts.Series<dynamic, num>> seriesList;
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final bool? animate;
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const RTLLineChart(this.seriesList, {this.animate, Key? key})
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: super(key: key);
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/// Creates a [LineChart] with sample data and no transition.
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factory RTLLineChart.withSampleData() {
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return RTLLineChart(
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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 RTLLineChart.withRandomData() {
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return RTLLineChart(_createRandomData());
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}
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/// Create random data.
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static List<charts.Series<LinearSales, num>> _createRandomData() {
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final random = Random();
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final data = [
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LinearSales(0, random.nextInt(100)),
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LinearSales(1, random.nextInt(100)),
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LinearSales(2, random.nextInt(100)),
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LinearSales(3, random.nextInt(100)),
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];
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return [
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charts.Series<LinearSales, int>(
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id: 'Sales',
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domainFn: (LinearSales sales, _) => sales.year,
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measureFn: (LinearSales sales, _) => sales.sales,
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data: data,
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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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// Charts will determine if RTL is enabled by checking the directionality by
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// requesting Directionality.of(context). This returns the text direction
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// from the closest instance of that encloses the context passed to build
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// the chart. A [TextDirection.rtl] will be treated as a RTL chart. This
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// means that the directionality widget does not have to directly wrap each
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// chart. It is show here as an example only.
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//
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// By default, when a chart detects RTL:
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// Measure axis positions are flipped. Primary measure axis is on the right
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// and the secondary measure axis is on the left (when used).
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// Domain axis' first domain starts on the right and grows left.
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return Directionality(
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textDirection: TextDirection.rtl,
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child: charts.LineChart(
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seriesList,
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animate: animate,
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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<LinearSales, int>> _createSampleData() {
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final data = [
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LinearSales(0, 5),
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LinearSales(1, 25),
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LinearSales(2, 100),
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LinearSales(3, 75),
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];
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return [
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charts.Series<LinearSales, int>(
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id: 'Sales',
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domainFn: (LinearSales sales, _) => sales.year,
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measureFn: (LinearSales sales, _) => sales.sales,
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data: data,
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)
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];
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}
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}
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/// Sample linear data type.
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class LinearSales {
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final int year;
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final int sales;
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LinearSales(this.year, this.sales);
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}
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