using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.Serialization;
using UnityEngine.UI;
public class LerpSlider : UnityEngine.UI.Slider, IPointerDownHandler
{
    private float lerpDuration = 0.08f; // 过渡时间

    private float targetValue;
    private bool isLerping;

    public bool UseLerping=true;

    public Action OnPointDown;
    
    protected override void Update()
    {
        base.Update();
        if(!UseLerping)
            return;
        if (isLerping)
        {
            // 平滑过渡到目标值
            value = Mathf.Lerp(value, targetValue, Time.deltaTime / lerpDuration);

            // 检查是否接近目标值，结束过渡
            if (Mathf.Abs(value - targetValue) < 0.01f)
            {
                value = targetValue;
                isLerping = false;
            }
        }
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        OnPointDown?.Invoke();
        // 计算点击位置的值
        RectTransformUtility.ScreenPointToLocalPointInRectangle(
            GetComponent<RectTransform>(), eventData.position, eventData.pressEventCamera, out var localPoint);

        // 计算滑块的点击位置对应的值
        float normalizedValue = Mathf.InverseLerp(
            GetComponent<RectTransform>().rect.xMin,
            GetComponent<RectTransform>().rect.xMax,
            localPoint.x
        );

        targetValue = Mathf.Clamp01(normalizedValue); // 确保值在0到1之间
        UseLerping = true;
        isLerping = true;
    }
}