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

namespace TestSeagate.Common
{
    class UIAssociate
    {
        /// <summary>
        /// 查找第一个父节点是T类型的节点，并返回。
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dobj"></param>
        /// <returns></returns>
        public static T GetAncestor<T>(DependencyObject dobj) where T : FrameworkElement
        {
            DependencyObject parent = VisualTreeHelper.GetParent(dobj);//可视树 深入内部
            while (!(parent is T) && parent != null)
            {
                parent = VisualTreeHelper.GetParent(parent);
            }
            if (parent != null)
            {
                return (T)parent;
            } else
            {
                return null;
            }
        }
        /// <summary>
        /// 查找所有满足条件的子节点，
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="depen"></param>
        /// <param name="childname"></param>
        /// <returns></returns>
        public static List<T> GetChildren<T>(DependencyObject depen,string childname=null) where T:FrameworkElement
        {
            DependencyObject child = null;
            List<T> lists = new List<T>();
            for(int i=0;i<VisualTreeHelper.GetChildrenCount(depen);i++)
            {
                child = VisualTreeHelper.GetChild(depen,i);
                if((child is T)&&(((T)child).Name==childname||string.IsNullOrEmpty(childname)))
                {
                    lists.Add((T)child);
                }
                lists.AddRange(GetChildren<T>(child, childname));
            }
            return lists;
        }
    }
}