Basic Pie
The [ObservableObject], [ObservableProperty] and [ICommand] attributes come from the
CommunityToolkit.Mvvm package, you can read more about it
here.
This web site wraps every sample using a ContentPage instance, but LiveCharts controls can be used inside any container.
View model
using LiveChartsCore;
using LiveChartsCore.SkiaSharpView;
using CommunityToolkit.Mvvm.ComponentModel;
using System.Collections.Generic;
using LiveChartsCore.SkiaSharpView.Painting;
using SkiaSharp;
namespace ViewModelsSamples.Pies.Basic;
[ObservableObject]
public partial class ViewModel
{
public ViewModel()
{
// but
// you could convert any IEnumerable to a pie series collection
// so it is easier to convert an array or collection of data to a pie chart.
var data = new double[] { 2, 4, 1, 4, 3 };
// Series = data.AsLiveChartsPieSeries(); this could be enough in some cases // mark
// but you can customize the series properties using the following overload: // mark
Series = data.AsLiveChartsPieSeries((value, series) =>
{
// here you can configure the series assigned to each value.
series.Name = $"Series for value {value}";
series.DataLabelsPaint = new SolidColorPaint(new SKColor(30, 30, 30));
series.DataLabelsPosition = LiveChartsCore.Measure.PolarLabelsPosition.Outer;
series.DataLabelsFormatter = p => $"Label: {p.Context.DataSource}";
});
// this is an equivalent and more verbose syntax. // mark
// Series = new ISeries[]
// {
// new PieSeries<double> { Values = new double[] { 2 }, Name = "Slice 1" },
// new PieSeries<double> { Values = new double[] { 4 }, Name = "Slice 2" },
// new PieSeries<double> { Values = new double[] { 1 }, Name = "Slice 3" },
// new PieSeries<double> { Values = new double[] { 4 }, Name = "Slice 4" },
// new PieSeries<double> { Values = new double[] { 3 }, Name = "Slice 5" }
// };
}
public IEnumerable<ISeries> Series { get; set; }
}
XAML
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="XamarinSample.Pies.Basic.View"
xmlns:lvc="clr-namespace:LiveChartsCore.SkiaSharpView.Xamarin.Forms;assembly=LiveChartsCore.SkiaSharpView.XamarinForms"
xmlns:vms="clr-namespace:ViewModelsSamples.Pies.Basic;assembly=ViewModelsSamples">
<ContentPage.BindingContext>
<vms:ViewModel/>
</ContentPage.BindingContext>
<lvc:PieChart Series="{Binding Series}" LegendPosition="Right"/>
</ContentPage>
