/*-------------------------------------------------------------------------
 * 功能描述：WidthSupport
 * 作者：xulisong
 * 创建时间： 2019/5/29 14:24:11
 * 版本号：v1.0
 *  -------------------------------------------------------------------------*/

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

namespace FWindSoft.Wpf.Controls
{
    /// <summary>
    /// 宽度支撑
    /// </summary>
    public class WidthSupport:Border
    {
        public WidthSupport()
        {
            this.Visibility = Visibility.Hidden;
            this.HorizontalAlignment = HorizontalAlignment.Stretch;
        }
        public static readonly DependencyProperty MarkerProperty =
            DependencyProperty.Register("SupportElement", typeof(FrameworkElement), typeof(WidthSupport));
        /// <summary>
        /// 所支撑的元素
        /// </summary>
        public FrameworkElement SupportElement
        {
            get { return (FrameworkElement)GetValue(MarkerProperty); }
            set { SetValue(MarkerProperty, value); }
        }
        protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
        {
            //基类是程序集级别的，也能重写？
            if (SupportElement != null)
            {
                (SupportElement).Width = this.ActualWidth;
                SupportElement.UpdateLayout();
            }     
        }
    }
}