///////////////////////////////////////////////////////////////////////////////
//Copyright (c) 2016, 北京探索者软件公司
//All rights reserved.       
//文件名称: MaskOptions.cs
//文件描述: MaskOptions.cs
//创 建 者: xls
//创建日期: 2018/6/1 8:46:49
//版 本 号：1.0.0.0
////////////////////////////////////////////////////////////////////////////////
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.Documents;

namespace FWindSoft.Wpf.Controls
{
    public class MaskOptions
    {
        /*
         * 1、Show的时候判断显示模板，给控件添加装饰层
         * 2、通过数据模板去控制具体模板的显示
        */
        #region 附加属性
        /// <summary>
        /// 是否显示遮罩层
        /// </summary>
        public static readonly DependencyProperty IsShowProperty = DependencyProperty.RegisterAttached("IsShow",
          typeof(bool), typeof(MaskOptions), new PropertyMetadata(false, PropertyChanged));
        public static bool GetIsShow(DependencyObject obj)
        {
            return (bool)obj.GetValue(IsShowProperty);
        }
        public static void SetIsShow(DependencyObject obj, object value)
        {
            obj.SetValue(IsShowProperty, value);
        }
        /// <summary>
        /// 手动控制蒙版隐藏
        /// </summary>
        public static readonly DependencyProperty  IsManualHideProperty = DependencyProperty.RegisterAttached("IsManualHide",
          typeof(bool), typeof(MaskOptions), new PropertyMetadata(false, PropertyChanged));
        public static bool GetIsManualHide(DependencyObject obj)
        {
            return (bool)obj.GetValue(IsManualHideProperty);
        }
        public static void SetIsManualHide(DependencyObject obj, object value)
        {
            obj.SetValue(IsManualHideProperty, value);
        }
        /// <summary>
        /// 遮罩模板
        /// </summary>
        public static readonly DependencyProperty MaskTemplateProperty = DependencyProperty.RegisterAttached("MaskTemplate",
          typeof(ControlTemplate), typeof(MaskOptions), new PropertyMetadata(null, null));
        public static ControlTemplate GetMaskTemplate(DependencyObject obj)
        {
            return obj.GetValue(MaskTemplateProperty) as ControlTemplate;
        }
        public static void SetMaskTemplate(DependencyObject obj, ControlTemplate value)
        {
            obj.SetValue(MaskTemplateProperty, value);
        }

        /// <summary>
        /// 默认Adorner
        /// </summary>
        public static readonly DependencyProperty MaskAdornerProperty = DependencyProperty.RegisterAttached(" MaskAdorner",
          typeof(MaskAdorner), typeof(MaskOptions), new PropertyMetadata(null, null));
        public static MaskAdorner GetMaskAdorner(DependencyObject obj)
        {
            return obj.GetValue(MaskAdornerProperty) as MaskAdorner;
        }
        public static void SetMaskAdorner(DependencyObject obj, MaskAdorner value)
        {
            obj.SetValue(MaskAdornerProperty, value);
        }
        #endregion

        private static void PropertyChanged(DependencyObject sender,DependencyPropertyChangedEventArgs args )
        {
            UIElement uIElement = sender as UIElement;
            if (uIElement == null)
                return;
            if (args.Property != IsShowProperty)
                return;
            MaskAdorner adorner = uIElement.ReadLocalValue(MaskAdornerProperty) as MaskAdorner;        
            bool show = (bool) args.NewValue;
            AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(uIElement);
            if (adornerLayer == null)
                return;
            if (show)
            {
                if (adorner == null)
                {
                    ControlTemplate maskTemplate = MaskOptions.GetMaskTemplate(uIElement);
                    if (maskTemplate == null)
                        return;

                    adorner = new MaskAdorner(uIElement, maskTemplate);
                    SetMaskAdorner(uIElement, adorner);
                    adorner.MouseLeave += Adorner_MouseLeave;
                    adornerLayer.Add(adorner);
                }
                else
                {
                      adornerLayer.Add(adorner);
                }
            }
            else if (!show && adorner != null)
            {
                adorner.MouseLeave -= Adorner_MouseLeave;
                adornerLayer.Remove(adorner);
                SetMaskAdorner(uIElement, null);
            }
        }

        private static void Adorner_MouseLeave(object sender, System.Windows.Input.MouseEventArgs e)
        {
            MaskAdorner adorner = sender as MaskAdorner;
            if (adorner == null)
                return;
            if (MaskOptions.GetIsManualHide(adorner.AdornedElement))
            {
                //如果是手动隐藏，则不自动配置
                return;
            }

            MaskOptions.SetIsShow(adorner.AdornedElement, false);
        }

    
    }
}