[游戏开发]WPF 获取当前TreeView的TreeViewItem

#region 获取控件
        //获取当前TreeView的TreeViewItem
        public TreeViewItem GetParentObjectEx<TreeViewItem>(DependencyObject obj) where TreeViewItem : FrameworkElement
        {
            DependencyObject parent = VisualTreeHelper.GetParent(obj);
            while (parent != null)
            {
                if (parent is TreeViewItem)
                {
                    return (TreeViewItem)parent;
                }
                parent = VisualTreeHelper.GetParent(parent);
            }
            return null;
        }
        //获取ItemTemplate内部的各种控件
        private childItem FindVisualChild<childItem>(DependencyObject obj) where childItem : DependencyObject
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                if (child != null && child is childItem)
                    return (childItem)child;
                else
                {
                    childItem childOfChild = FindVisualChild<childItem>(child);
                    if (childOfChild != null)
                        return childOfChild;
                }
            }
            return null;
        }

        //public TreeViewItem GetElementFromPoint<TreeViewItem>(this ItemsControl itemsControl, Point point) where TreeViewItem : DependencyObject
        //{
        //    UIElement element = itemsControl.InputHitTest(point) as UIElement;
        //    while (element != null)
        //    {
        //        if (element == itemsControl)
        //            return default(TreeViewItem);
        //        object item = itemsControl.ItemContainerGenerator.ItemFromContainer(element);
        //        if (!item.Equals(DependencyProperty.UnsetValue))
        //            return item as TreeViewItem;
        //        if (element is TreeViewItem)
        //        {
        //            return element as TreeViewItem;
        //        }
        //        element = (UIElement)VisualTreeHelper.GetParent(element);
        //    }
        //    return default(TreeViewItem);
        //}
        //获取父级，直到ucTreeViewItemHeader
        /// <summary>
        /// 根据坐标获取TreeviewItem
        /// </summary>
        /// <param name="point"></param>
        /// <returns></returns>
        public ucTreeViewItemHeader GetTreeViewItemByPoint( Point point) {
            UIElement element = this.InputHitTest(point) as UIElement;
            return GetParentElement(element);
           

        }
        public ucTreeViewItemHeader GetParentElement(UIElement element)
        {

            try
            {
                if (element == null) { return null; }

                ucTreeViewItemHeader treeViewItem = null;
                if (element is ucTreeViewItemHeader)
                {
                    treeViewItem = element as ucTreeViewItemHeader;
                }
                else
                {
                    element = VisualTreeHelper.GetParent(element) as UIElement;
                    treeViewItem = GetParentElement(element);
                }
                return treeViewItem;

            }
            catch (Exception ex)
            {
                MessageBox.Show("GetParentElement" + ex.Message);
                throw ex;
            }
        }
        #endregion

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