Outside Labels
The [ObservableObject], [ObservableProperty] and [RelayCommand] 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 LiveChartsCore.SkiaSharpView.Extensions;
namespace ViewModelsSamples.Pies.OutLabels;
public partial class ViewModel : ObservableObject
{
private static int _index = 0;
private static string[] _names = new[] { "Maria", "Susan", "Charles", "Fiona", "George" };
public IEnumerable<ISeries> Series { get; set; } =
new[] { 8, 6, 5, 3, 3 }.AsPieSeries((value, series) =>
{
series.Name = _names[_index++ % _names.Length];
series.DataLabelsPosition = LiveChartsCore.Measure.PolarLabelsPosition.Outer; // mark
series.DataLabelsSize = 15;
series.DataLabelsPaint = new SolidColorPaint(new SKColor(30, 30, 30));
series.DataLabelsFormatter =
point =>
$"This slide takes {point.Coordinate.PrimaryValue} " +
$"out of {point.StackedValue!.Total} parts";
series.ToolTipLabelFormatter = point => $"{point.StackedValue!.Share:P2}";
});
}
XAML
<UserControl x:Class="UnoWinUISample.Pies.OutLabels.View"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:lvc="using:LiveChartsCore.SkiaSharpView.WinUI"
xmlns:vms="using:ViewModelsSamples.Pies.OutLabels"
mc:Ignorable="d">
<UserControl.DataContext>
<vms:ViewModel/>
</UserControl.DataContext>
<lvc:PieChart
Series="{Binding Series}"
IsClockwise="False"
InitialRotation="-90">
</lvc:PieChart>
</UserControl>
