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;

        private CanvasGroup canvasGroup;
        //[HideInInspector]
        public float v = 0;
        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="_parent"></param>
        public void Init(CarouselMenu _parent)
        {
            rect = GetComponent<RectTransform>();
            canvasGroup = GetComponent<CanvasGroup>();
            //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);
            rect.localPosition = new Vector3(rect.localPosition.x, parent.GetPosition(v), rect.localPosition.z);
            canvasGroup.alpha = parent.GetAlpha(v)+1f;
            //img.color = clr;
            rect.localScale = new Vector3(parent.GetScale(v), parent.GetScale(v), 1);
            if (rect.localScale.x>=1)
            {
                rect.localScale = Vector3.one;
            }
        }
    }
}