using UnityEngine;
using UnityEngine.UI;

namespace Toolset.UI
{
    /// <summary>
    /// 轮播图子元素
    /// </summary>
    public class CarouselItem : MonoBehaviour
    {
        private CarouselMenu parent;
        private RectTransform rect;
        private Image img;
        private Color clr;
        //[HideInInspector]
        public float v = 0;
        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="_parent"></param>
        public void Init(CarouselMenu _parent)
        {
            rect = GetComponent<RectTransform>();
            img = GetComponent<Image>();
            parent = _parent;
            clr = img.color;
        }
        /// <summary>
        /// 计算transform
        /// </summary>
        /// <param name="value"></param>
        public void CalculateTrans(float value)
        {
            v += value;
            rect.localPosition = new Vector3(parent.GetPosition(v), rect.localPosition.y, rect.localPosition.z);
            clr.a = parent.GetAlpha(v);
            if (clr.a > 0) 
            {
                GetComponent<Image>().raycastTarget = true;
            }
            else
            {
                GetComponent<Image>().raycastTarget = false;
            }
            img.color = clr;
            rect.localScale = new Vector3(parent.GetScale(v), parent.GetScale(v), 1);
        }
    }
}