ShrlAlgoToolkit/AntDesignWPF/Converters/StartPointConverter.cs

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
using System.Windows.Markup;

namespace AntDesign.WPF.Converters
{
    public class StartPointConverter : MarkupExtension, IValueConverter
    {
        [Obsolete]
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is double v && (v > 0.0))
            {
                return new Point(v / 2, 0);
            }

            return new Point();
        }

        [Obsolete]
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;    
        }
    }
}