using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;
using System.Windows;

namespace WGneu
{
    class Utils
    {
        public static IEnumerable<T> FindVisualChilds<T>(DependencyObject depObj) where T : DependencyObject
        {
            if (depObj == null)
                yield return (T)Enumerable.Empty<T>();
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
            {
                DependencyObject ithChild = VisualTreeHelper.GetChild(depObj, i);
                if (ithChild == null)
                    continue;
                if (ithChild is T t)
                    yield return t;
                foreach (T childOfChild in FindVisualChilds<T>(ithChild))
                    yield return childOfChild;
            }
        }
    }
}