using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Button = UnityEngine.UI.Button;
using System;

public class ScroolTest : MonoBehaviour
{

    public GameObject btnObj;
    public Transform parentTrans;
    public GameObject scrollViewObj;
    private Vector2 scroSize;


    public static ScroolTest Instance { get; protected set; }

    public event Action<int, string> ButtonBeClickEvent;

    // Start is called before the first frame update
    void Start()
    {

    }

    void Awake()
    {
        if (Instance == null)
            Instance = this;
    }

    // Update is called once per frame
    void Update()
    {

    }

    /// <summary>
    /// 初始化滑动视图
    /// </summary>
    /// <param name="nameArr">需要展示的Item的名称数组</param>
    /// <param name="scrollViewPostion">滚动视图的位置</param>
    /// <param name="scrollViewSize">滚动视图的大小</param>
    /// <param name="contentSize">Item的大小</param>
    public void InitScrollview(string[] nameArr, Vector3 scrollViewPostion, Vector2 scrollViewSize, Vector2 contentSize)
    {
        //获取Scrollview并设置视图大小
        scrollViewObj.GetComponent<RectTransform>().sizeDelta = scrollViewSize;
        scrollViewObj.GetComponent<RectTransform>().position = scrollViewPostion;

        GameObject content = GameObject.Find("Content");
        content.GetComponent<GridLayoutGroup>().cellSize = contentSize;
        //content.GetComponent<RectTransform>().localScale = new Vector3(1, 1, 1);//重要的是这一句

        for (int i = 0; i < nameArr.Length; i++)
        {
            CreatItem(i, nameArr[i]);
        }
    }

    

    public void CreatItem(int idx, string name)
    {
        GameObject obj = Instantiate(btnObj, parentTrans);

        Button oneBtn = obj.GetComponentInChildren<Button>();      

        Text btnText = obj.transform.GetChild(0).GetComponent<Text>();

        btnText.text = name;
        // btnText.fontSize = 44;

        oneBtn.onClick.AddListener(() =>
        {
            //Debug.Log("按钮" + idx + "被点击了");
            ButtonBeClick(idx, name);
        });
    }

    //按钮被点击
    public void ButtonBeClick(int index, string btnName)
    {
        var evt = ButtonBeClickEvent;
        if (evt != null) evt(index, btnName);
    }

}