using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public interface IItemBase<T>
{
    void InitInfo(T info);
}

/// <summary>
/// 
/// </summary>
/// <typeparam name="T">数据源</typeparam>
/// <typeparam name="K">格子类</typeparam>
public class CustomSV<T, K> where K : IItemBase<T>
{
    private RectTransform content;

    private int viewHeight;

    private Dictionary<int, GameObject> currItemDic = new Dictionary<int, GameObject>();

    private List<T> itemList;

    private int preMinIndex = -1;
    private int preMaxIndex = -1;

    private float itemW;
    private float itemH;

    private int col;

    public CustomSV(RectTransform content,int h,List<T> itemList,float itemW,float itemH)
    {
        this.content = content;
        this.viewHeight = h;
        this.itemList = itemList;
        this.itemW = itemW;
        this.itemH = itemH;
    }

    private void InitContentHeigth()
    {
        content.sizeDelta = new Vector2(col * itemW, Mathf.CeilToInt(itemList.Count / col) * itemH);
    }

    public void UpdateConten()
    {
        int minIndex = (int)(content.anchoredPosition3D.y / itemH) * col;
        int maxIndex = (int)((content.anchoredPosition3D.y + viewHeight) / itemH) * col + (col - 1);

    }

    private int IndexLimit(int index)
    {
        return Mathf.Clamp(index, 0, itemList.Count - 1);
    }
}