XRLib/Assets/Scripts/UVC/UIToolkit/Slider/UTKSlider.cs

#nullable enable
using System;
using UnityEngine;
using UnityEngine.UIElements;

namespace UVC.UIToolkit
{
    /// <summary>
    /// 슬라이더 컴포넌트.
    /// Unity Slider를 래핑하여 커스텀 스타일을 적용합니다.
    /// </summary>
    [UxmlElement]
    public partial class UTKSlider : Slider, IDisposable
    {
        #region Constants
        private const string USS_PATH = "UIToolkit/Slider/UTKSlider";
        #endregion

        #region Fields
        private bool _disposed;
        private bool _isEnabled = true;
        #endregion

        #region Events
        /// <summary>값 변경 이벤트</summary>
        public event Action<float>? OnValueChanged;
        #endregion

        #region Properties
        /// <summary>활성화 상태</summary>
        [UxmlAttribute]
        public bool IsEnabled
        {
            get => _isEnabled;
            set
            {
                _isEnabled = value;
                SetEnabled(value);
                EnableInClassList("utk-slider--disabled", !value);
            }
        }
        #endregion

        #region Constructor
        public UTKSlider() : base()
        {
            UTKThemeManager.Instance.ApplyThemeToElement(this);

            var uss = Resources.Load<StyleSheet>(USS_PATH);
            if (uss != null)
            {
                styleSheets.Add(uss);
            }

            SetupStyles();
            SetupEvents();
            SubscribeToThemeChanges();
        }

        public UTKSlider(string label, float minValue = 0f, float maxValue = 100f, float defaultValue = 0f) : this()
        {
            this.label = label;
            this.lowValue = minValue;
            this.highValue = maxValue;
            this.value = defaultValue;
        }
        #endregion

        #region Setup
        private void SetupStyles()
        {
            AddToClassList("utk-slider");
        }

        private void SetupEvents()
        {
            this.RegisterValueChangedCallback(OnSliderValueChanged);
        }

        private void SubscribeToThemeChanges()
        {
            UTKThemeManager.Instance.OnThemeChanged += OnThemeChanged;
            RegisterCallback<DetachFromPanelEvent>(_ =>
            {
                UTKThemeManager.Instance.OnThemeChanged -= OnThemeChanged;
            });
        }

        private void OnThemeChanged(UTKTheme theme)
        {
            UTKThemeManager.Instance.ApplyThemeToElement(this);
        }
        #endregion

        #region Event Handlers
        private void OnSliderValueChanged(ChangeEvent<float> evt)
        {
            OnValueChanged?.Invoke(evt.newValue);
        }
        #endregion

        #region IDisposable
        public void Dispose()
        {
            if (_disposed) return;
            _disposed = true;

            UTKThemeManager.Instance.OnThemeChanged -= OnThemeChanged;
            OnValueChanged = null;
        }
        #endregion
    }
}