using System;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class SliderEvent : MonoBehaviour, IEndDragHandler, IBeginDragHandler
{
    public VideoPlayerEx vpEx;

    private Slider _slider;
    
    void Start()
    {
        _slider = GetComponent<Slider>();
        InvokeRepeating("UpdateSlider", 0, 0.1f);
    }

    // Update is called once per frame
    void UpdateSlider()
    {
        if ( vpEx.isPlaying &&  !vpEx.isDrag)
        {
            _slider.value = vpEx.VideoProgress;
        }
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        vpEx.SetTime(_slider.value * vpEx.VideoTime);
        Invoke("SetDrag", 0.5f);    // 延时实现进度条的同步
    }

    void SetDrag()
    {
        vpEx.isDrag = false;
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        vpEx.isDrag = true;
        vpEx.Pause();
    }
}