Custom
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 UserControl instance, but LiveCharts controls can be used inside any container.
View model
using System.Collections.Generic;
using LiveChartsCore;
using CommunityToolkit.Mvvm.ComponentModel;
using LiveChartsCore.SkiaSharpView.Painting;
using SkiaSharp;
using System;
using LiveChartsCore.SkiaSharpView.Extensions;
namespace ViewModelsSamples.Pies.Custom;
public partial class ViewModel : ObservableObject
{
public ViewModel()
{
var outer = 0;
var data = new[] { 6, 5, 4, 3 };
// you can convert any array, list or IEnumerable<T> to a pie series collection:
Series = data.AsPieSeries((value, series) =>
{
// this method is called once per element in the array, so:
// for the series with the value 6, we set the outer radius to 1
// for the series with the value 5, the outer radius is 0.9
// for the series with the value 4, the outer radius is 0.8
// for the series with the value 3, the outer radius is 0.7
// The MaxOuterRadius property sets the maximum outer, the value goes from
// 0 to 1, where 1 is the full available radius and 0 is none.
series.OuterRadiusOffset = outer;
outer += 50;
series.DataLabelsPaint = new SolidColorPaint(SKColors.White)
{
SKTypeface = SKTypeface.FromFamilyName("Arial", SKFontStyle.Bold)
};
series.ToolTipLabelFormatter =
point =>
{
var pv = point.Coordinate.PrimaryValue;
var sv = point.StackedValue!;
var a = $"{pv}/{sv.Total}{Environment.NewLine}{sv.Share:P2}";
return a;
};
series.DataLabelsFormatter =
point =>
{
var pv = point.Coordinate.PrimaryValue;
var sv = point.StackedValue!;
var a = $"{pv}/{sv.Total}{Environment.NewLine}{sv.Share:P2}";
return a;
};
});
}
public IEnumerable<ISeries> Series { get; set; }
}
XAML
<UserControl x:Class="WPFSample.Pies.Custom.View"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:lvc="clr-namespace:LiveChartsCore.SkiaSharpView.WPF;assembly=LiveChartsCore.SkiaSharpView.WPF"
xmlns:vms="clr-namespace:ViewModelsSamples.Pies.Custom;assembly=ViewModelsSamples">
<UserControl.DataContext>
<vms:ViewModel/>
</UserControl.DataContext>
<lvc:PieChart Series="{Binding Series}" InitialRotation="-90"/>
</UserControl>
