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.
137 lines
4.5 KiB
137 lines
4.5 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.
|
|
|
|
/// Custom Font Style Example
|
|
// EXCLUDE_FROM_GALLERY_DOCS_START
|
|
import 'dart:math';
|
|
// EXCLUDE_FROM_GALLERY_DOCS_END
|
|
import 'package:flutter/material.dart';
|
|
import 'package:charts_flutter/flutter.dart' as charts;
|
|
|
|
/// Example of using a custom primary measure and domain axis replacing the
|
|
/// renderSpec with one with a custom font size and a custom color.
|
|
///
|
|
/// There are many axis styling options in the SmallTickRenderer allowing you
|
|
/// to customize the font, tick lengths, and offsets.
|
|
class CustomFontSizeAndColor extends StatelessWidget {
|
|
final List<charts.Series> seriesList;
|
|
final bool animate;
|
|
|
|
CustomFontSizeAndColor(this.seriesList, {this.animate});
|
|
|
|
factory CustomFontSizeAndColor.withSampleData() {
|
|
return new CustomFontSizeAndColor(
|
|
_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 CustomFontSizeAndColor.withRandomData() {
|
|
return new CustomFontSizeAndColor(_createRandomData());
|
|
}
|
|
|
|
/// Create random data.
|
|
static List<charts.Series<OrdinalSales, String>> _createRandomData() {
|
|
final random = new Random();
|
|
|
|
final globalSalesData = [
|
|
new OrdinalSales('2014', random.nextInt(100) * 100),
|
|
new OrdinalSales('2015', random.nextInt(100) * 100),
|
|
new OrdinalSales('2016', random.nextInt(100) * 100),
|
|
new OrdinalSales('2017', random.nextInt(100) * 100),
|
|
];
|
|
|
|
return [
|
|
new charts.Series<OrdinalSales, String>(
|
|
id: 'Global Revenue',
|
|
domainFn: (OrdinalSales sales, _) => sales.year,
|
|
measureFn: (OrdinalSales sales, _) => sales.sales,
|
|
data: globalSalesData,
|
|
),
|
|
];
|
|
}
|
|
// EXCLUDE_FROM_GALLERY_DOCS_END
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return new charts.BarChart(
|
|
seriesList,
|
|
animate: animate,
|
|
|
|
/// Assign a custom style for the domain axis.
|
|
///
|
|
/// This is an OrdinalAxisSpec to match up with BarChart's default
|
|
/// ordinal domain axis (use NumericAxisSpec or DateTimeAxisSpec for
|
|
/// other charts).
|
|
domainAxis: new charts.OrdinalAxisSpec(
|
|
renderSpec: new charts.SmallTickRendererSpec(
|
|
|
|
// Tick and Label styling here.
|
|
labelStyle: new charts.TextStyleSpec(
|
|
fontSize: 18, // size in Pts.
|
|
color: charts.MaterialPalette.black),
|
|
|
|
// Change the line colors to match text color.
|
|
lineStyle: new charts.LineStyleSpec(
|
|
color: charts.MaterialPalette.black))),
|
|
|
|
/// Assign a custom style for the measure axis.
|
|
primaryMeasureAxis: new charts.NumericAxisSpec(
|
|
renderSpec: new charts.GridlineRendererSpec(
|
|
|
|
// Tick and Label styling here.
|
|
labelStyle: new charts.TextStyleSpec(
|
|
fontSize: 18, // size in Pts.
|
|
color: charts.MaterialPalette.black),
|
|
|
|
// Change the line colors to match text color.
|
|
lineStyle: new charts.LineStyleSpec(
|
|
color: charts.MaterialPalette.black))),
|
|
);
|
|
}
|
|
|
|
/// Create series list with single series
|
|
static List<charts.Series<OrdinalSales, String>> _createSampleData() {
|
|
final globalSalesData = [
|
|
new OrdinalSales('2014', 5000),
|
|
new OrdinalSales('2015', 25000),
|
|
new OrdinalSales('2016', 100000),
|
|
new OrdinalSales('2017', 750000),
|
|
];
|
|
|
|
return [
|
|
new charts.Series<OrdinalSales, String>(
|
|
id: 'Global Revenue',
|
|
domainFn: (OrdinalSales sales, _) => sales.year,
|
|
measureFn: (OrdinalSales sales, _) => sales.sales,
|
|
data: globalSalesData,
|
|
),
|
|
];
|
|
}
|
|
}
|
|
|
|
/// Sample ordinal data type.
|
|
class OrdinalSales {
|
|
final String year;
|
|
final int sales;
|
|
|
|
OrdinalSales(this.year, this.sales);
|
|
}
|