using UnityEngine;
using UnityEngine.UI;
using System.Collections;
/// <summary>
/// 单点
/// </summary>
public class ScrollViewHorizontalClickMove : MonoBehaviour
{
    ScrollRect scrollRect; // 引用ScrollRect组件
    public float smoothTime = 0.3f; // 平滑过渡的时间
    public float stepDistance = 0.16f; // 移动的距离
    private float targetPosition; // 目标滚动位置
    private bool isScrolling = false; // 是否正在滚动

    private void Start()
    {
        scrollRect = GetComponent<ScrollRect>();
    }
    public void ScrollLeft()
    {
        StartCoroutine(SmoothScroll(-stepDistance)); // 假设每次点击向左滚动一小部分
    }

    public void ScrollRight()
    {
        StartCoroutine(SmoothScroll(stepDistance)); // 假设每次点击向右滚动一小部分
    }

    private IEnumerator SmoothScroll(float direction)
    {
        if (isScrolling) yield break; // 如果已经在滚动，则不开始新的滚动

        isScrolling = true;
        float elapsedTime = 0f;
        float lerp = 0f;

        // 计算开始时的当前位置和目标位置
        float startPosition = scrollRect.horizontalNormalizedPosition;
        targetPosition = Mathf.Clamp(startPosition + direction, 0f, 1f); // 确保目标位置在有效范围内

        // 循环直到达到目标位置或超过平滑时间
        while (lerp < 1f && elapsedTime < smoothTime)
        {
            elapsedTime += Time.deltaTime;
            lerp = Mathf.SmoothStep(0f, 1f, elapsedTime / smoothTime); // 使用SmoothStep函数进行平滑插值

            // 根据插值计算新的滚动位置
            float newPosition = Mathf.Lerp(startPosition, targetPosition, lerp);
            scrollRect.horizontalNormalizedPosition = newPosition;

            // 等待下一帧
            yield return null;
        }

        // 确保最终位置与目标位置一致
        scrollRect.horizontalNormalizedPosition = targetPosition;
        isScrolling = false;
    }
}