通过鼠标事件，从鼠标点击的坐标寻找指定的控件

/// <summary>
        /// 图片鼠标右键
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Image_slt_MouseRightButtonUp(object sender, MouseButtonEventArgs e)
        {
            Point point = e.GetPosition(tree);
            HitTestResult result = VisualTreeHelper.HitTest(tree, point);
            if (result == null)
                return;
            ListBoxItem item = Utils.FindVisualParent<ListBoxItem>(result.VisualHit);
            if (item == null)
                return;
            var vm_item = item.DataContext as ImageTreeControlImageModel;
            if (vm_item == null)
                return;
            ContextMenu menu = new ContextMenu();
            MenuItem mitem = new MenuItem();
            mitem.Tag = vm_item;
            mitem.Click += mItem_Click;
            mitem.Header = "删除";
            menu.Items.Add(mitem);
            menu.IsOpen = true;
        }

internal static class Utils
    {
        public static T FindVisualParent<T>(DependencyObject obj) where T : class
        {
            while (obj != null)
            {
                if (obj is T)
                    return obj as T;

                obj = VisualTreeHelper.GetParent(obj);
            }

            return null;
        }
    }