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

namespace _29WxOrderWpf.Utils
{
    public class UiCtrlUtils
    {
        /// <summary>
        /// 查找模板控件的子控件
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static T FindVisualChild<T>(DependencyObject obj) where T : DependencyObject
        {

			for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                if (child != null && child is T)
                {
                    return (T)child;
                }
                else
                {
                    T childOfChild = FindVisualChild<T>(child);
                    if (childOfChild != null)
                    {
                        return childOfChild;
                    }
                }
            }
            return null;
        }

        /// <summary>
        /// 查找模板控件的子控件
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <param name="xName"></param>
        /// <returns></returns>
        public static T FindVisualChild<T>(DependencyObject obj, string xName) where T : DependencyObject
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                string controlName = child?.GetValue(Control.NameProperty) as string;
                if (controlName == xName)
                {
                    return (T)child;
                }
                else
                {
                    T childOfChild = FindVisualChild<T>(child, xName);
                    if (childOfChild != null)
                    {
                        return childOfChild;
                    }
                }
            }
            return null;
        }

        public static List<T> FindVisualChildAll<T>(DependencyObject obj, string xName) where T : DependencyObject
        {
            List<T> list= new List<T>();
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                string controlName = child?.GetValue(Control.NameProperty) as string;
                if (controlName == xName)
                {
                    list.Add((T)child);
                }
                else
                {
                    list.AddRange(FindVisualChildAll<T>(child, xName));
                }
            }
            return list;
        }
    }
}