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.
116 lines
3.7 KiB
116 lines
3.7 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.
|
|
|
|
/// RTL Line chart example
|
|
// EXCLUDE_FROM_GALLERY_DOCS_START
|
|
import 'dart:math';
|
|
// EXCLUDE_FROM_GALLERY_DOCS_END
|
|
import 'package:charts_flutter/flutter.dart' as charts;
|
|
import 'package:flutter_web/material.dart';
|
|
|
|
class RTLLineChart extends StatelessWidget {
|
|
final List<charts.Series> seriesList;
|
|
final bool animate;
|
|
|
|
RTLLineChart(this.seriesList, {this.animate});
|
|
|
|
/// Creates a [LineChart] with sample data and no transition.
|
|
factory RTLLineChart.withSampleData() {
|
|
return new RTLLineChart(
|
|
_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 RTLLineChart.withRandomData() {
|
|
return new RTLLineChart(_createRandomData());
|
|
}
|
|
|
|
/// Create random data.
|
|
static List<charts.Series<LinearSales, num>> _createRandomData() {
|
|
final random = new Random();
|
|
|
|
final data = [
|
|
new LinearSales(0, random.nextInt(100)),
|
|
new LinearSales(1, random.nextInt(100)),
|
|
new LinearSales(2, random.nextInt(100)),
|
|
new LinearSales(3, random.nextInt(100)),
|
|
];
|
|
|
|
return [
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Sales',
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.sales,
|
|
data: data,
|
|
)
|
|
];
|
|
}
|
|
// EXCLUDE_FROM_GALLERY_DOCS_END
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
// Charts will determine if RTL is enabled by checking the directionality by
|
|
// requesting Directionality.of(context). This returns the text direction
|
|
// from the closest instance of that encloses the context passed to build
|
|
// the chart. A [TextDirection.rtl] will be treated as a RTL chart. This
|
|
// means that the directionality widget does not have to directly wrap each
|
|
// chart. It is show here as an example only.
|
|
//
|
|
// By default, when a chart detects RTL:
|
|
// Measure axis positions are flipped. Primary measure axis is on the right
|
|
// and the secondary measure axis is on the left (when used).
|
|
// Domain axis' first domain starts on the right and grows left.
|
|
return new Directionality(
|
|
textDirection: TextDirection.rtl,
|
|
child: new charts.LineChart(
|
|
seriesList,
|
|
animate: animate,
|
|
));
|
|
}
|
|
|
|
/// Create one series with sample hard coded data.
|
|
static List<charts.Series<LinearSales, int>> _createSampleData() {
|
|
final data = [
|
|
new LinearSales(0, 5),
|
|
new LinearSales(1, 25),
|
|
new LinearSales(2, 100),
|
|
new LinearSales(3, 75),
|
|
];
|
|
|
|
return [
|
|
new charts.Series<LinearSales, int>(
|
|
id: 'Sales',
|
|
domainFn: (LinearSales sales, _) => sales.year,
|
|
measureFn: (LinearSales sales, _) => sales.sales,
|
|
data: data,
|
|
)
|
|
];
|
|
}
|
|
}
|
|
|
|
/// Sample linear data type.
|
|
class LinearSales {
|
|
final int year;
|
|
final int sales;
|
|
|
|
LinearSales(this.year, this.sales);
|
|
}
|