using System;
using UIKit;
using Shared.IO;
using CoreGraphics;
using Foundation;

namespace Shared
{
	/// <summary>
	/// 绝对位置布局，已经全面检查
	/// </summary>
	public  class FrameLayout:ViewGroup
	{
		/// <summary>
		/// 绝对布局
		/// </summary>
		public FrameLayout()
		{
			viewGroup = new MyFrameLayout(this) { };
            
            realViewGroup = viewGroup;
		}

		internal FrameLayout(UIView frameLayout)
		{
			viewGroup = frameLayout;
			realViewGroup = viewGroup;
		}
	}

	public class MyFrameLayout : UIView
	{
        [Weak] View view;
		public MyFrameLayout(View view)
		{
            this.view = view;
			//超出区域不显示
			Layer.MasksToBounds = true;
		}


        /// <summary>
        /// 点击开始
        /// </summary>
        /// <param name="touches">Touches.</param>
        /// <param name="evt">Evt.</param>
        public override void TouchesBegan(NSSet touches, UIEvent evt)
        {
            view?.TouchEvent(EventActions.Down, (touches.AnyObject as UITouch).LocationInView(this));
        }
        /// <summary>
        ///  移动
        /// </summary>
        /// <param name="touches">Touches.</param>
        /// <param name="evt">Evt.</param>
        public override void TouchesMoved(NSSet touches, UIEvent evt)
        {
            view?.TouchEvent(EventActions.Move, (touches.AnyObject as UITouch).LocationInView(this));
        }

        /// <summary>
        /// 点击弹起
        /// </summary>
        /// <param name="touches">Touches.</param>
        /// <param name="evt">Evt.</param>
        public override void TouchesEnded(NSSet touches, UIEvent evt)
        {
            view?.TouchEvent(EventActions.Up, (touches.AnyObject as UITouch).LocationInView(this));
        }

        public override void TouchesCancelled(NSSet touches, UIEvent evt)
        {
            view?.TouchEvent(EventActions.Cancel, (touches.AnyObject as UITouch).LocationInView(this));
        }
        /// <summary>
        /// 因为这个视图很奇怪，会自动加了两个UIImageView，所以这个特殊处理一下
        /// </summary>
        /// <param name="view">View.</param>
        public override void AddSubview(UIView view)
		{
			if (view.GetType() == typeof(UIImageView) && view.Tag != int.MinValue)
			{
				return;
			}
			base.AddSubview(view);
		}
	}
}