WPF VisualExtensions

VisualExtensions.cs

using System;
using System.Windows;
using System.Windows.Media;

namespace Songhay.Extensions
{
    public static class VisualExtensions
    {
        public static Point GetVisualOrigin(this Visual visual, Visual ancestorVisual)
        {
            if (visual == null) return default(Point);
            if (ancestorVisual == null) throw new ArgumentNullException("ancestorVisual", "The expected ancestor visual is not here.");

            var transform = visual.TransformToAncestor(ancestorVisual);
            var point = transform.Transform(new Point(0, 0));
            return point;
        }
    }
}