using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using System;
using UnityEngine.Events;

public class CustomSlider : Slider
{
    private SliderStartEvent m_OnValueStartChanged = new SliderStartEvent();
    [Serializable]
    /// <summary>
    /// Event type used by the UI.Slider.
    /// </summary>
    public class SliderStartEvent : UnityEvent { }
    public SliderStartEvent onValueStartChanged { get { return m_OnValueStartChanged; } set { m_OnValueStartChanged = value; } }

    private SliderEndEvent m_OnValueEndChanged = new SliderEndEvent();
    [Serializable]
    /// <summary>
    /// Event type used by the UI.Slider.
    /// </summary>
    public class SliderEndEvent : UnityEvent { }
    public SliderEndEvent onValueEndChanged { get { return m_OnValueEndChanged; } set { m_OnValueEndChanged = value; } }

    public override void OnPointerDown(PointerEventData eventData)
    {
        base.OnPointerDown(eventData);
        onValueStartChanged?.Invoke();
    }

    public override void OnPointerUp(PointerEventData eventData)
    {
        base.OnPointerUp(eventData);
        onValueEndChanged?.Invoke();
    }
}