using System;
using UIKit;
using Shared.IO;

namespace Shared
{
	/// <summary>
	/// 位置布局
	/// </summary>
	public  class HorizontalScrolViewLayout:ViewGroup
	{
		
		/// <summary>
		/// 构造函数
		/// </summary>
		public HorizontalScrolViewLayout()
		{   			
			viewGroup = new MyUIScrolView(this);
			realViewGroup = viewGroup;
		}
		/// <summary>
		/// 增加子视图
		/// </summary>
		/// <returns>The chidren.</returns>
		/// <param name="view">View.</param>
		public override void AddChidren(View view)
		{
			base.AddChidren(view);
			ReLocation();
		}

		/// <summary>
		/// 重新排位置及设备内容大小
		/// </summary>
		public virtual void ReLocation()
		{
			if (0 == viewList.Count)
			{
				return;
			}
			for (int i = 1; i < viewList.Count; i++)
			{
				var frame = viewList[i].RealView.Frame;
				frame.X = viewList[i - 1].RealView.Frame.Right;
				viewList[i].RealView.Frame = frame;
			}

			(realViewGroup as MyUIScrolView).ContentSize = new CoreGraphics.CGSize(viewList[viewList.Count - 1].Right <= Width ? Width + 1 : viewList[viewList.Count - 1].Right,0);
		}


		/// <summary>
		/// 移除所有的视图
		/// </summary>
		public override  void RemoveAll()
		{
			base.RemoveAll();
			ReLocation ();
		}

		/// <summary>
		/// 移除控件
		/// </summary>
		/// <param name="view">View.</param>
		public override void Remove(View view)
		{
			base.Remove(view);
			ReLocation ();
		}


		/// <summary>
		///  移除指定索引对象
		/// </summary>
		/// <param name="index">Index.</param>
		public override void RemoveAt(int index)
		{
			base.RemoveAt(index);
			ReLocation ();
		}

		/// <summary>
		/// 是否允许滑动
		/// </summary>
		/// <value><c>true</c> if scroll enabled; otherwise, <c>false</c>.</value>
		public bool ScrollEnabled
		{
			get
			{
				return (viewGroup as MyUIScrolView).ScrollEnabled;
			}
			set
			{
				(viewGroup as MyUIScrolView).ScrollEnabled = value;
			}
		}

		/// <summary>
		/// 是否正在滑动
		/// </summary>
		/// <value><c>true</c> if decelerating; otherwise, <c>false</c>.</value>
		public bool Decelerating
		{
			get
			{
				return (viewGroup as MyUIScrolView).Decelerating;
			}
		}
	}


}