UIToolkit 기본 UI 개발 중

Assets/Scripts/UVC/UIToolkit/Dropdown/UTKDropdown.cs

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+#nullable enable
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace UVC.UIToolkit
+{
+    /// <summary>
+    /// 드롭다운 메뉴 컴포넌트.
+    /// Unity DropdownField를 래핑하여 커스텀 스타일을 적용합니다.
+    /// </summary>
+    [UxmlElement]
+    public partial class UTKDropdown : DropdownField, IDisposable
+    {
+        #region Constants
+        private const string USS_PATH = "UIToolkit/Dropdown/UTKDropdown";
+        #endregion
+
+        #region Fields
+        private bool _disposed;
+        private bool _isEnabled = true;
+        #endregion
+
+        #region Events
+        /// <summary>선택 변경 이벤트</summary>
+        public event Action<int, string>? OnSelectionChanged;
+        #endregion
+
+        #region Properties
+        /// <summary>선택된 인덱스</summary>
+        public int SelectedIndex
+        {
+            get => index;
+            set => index = value;
+        }
+
+        /// <summary>선택된 값</summary>
+        public string? SelectedValue => value;
+
+        /// <summary>활성화 상태</summary>
+        [UxmlAttribute]
+        public bool IsEnabled
+        {
+            get => _isEnabled;
+            set
+            {
+                _isEnabled = value;
+                SetEnabled(value);
+                EnableInClassList("utk-dropdown--disabled", !value);
+            }
+        }
+        #endregion
+
+        #region Constructor
+        public UTKDropdown() : base()
+        {
+            UTKThemeManager.Instance.ApplyThemeToElement(this);
+
+            var uss = Resources.Load<StyleSheet>(USS_PATH);
+            if (uss != null)
+            {
+                styleSheets.Add(uss);
+            }
+
+            SetupStyles();
+            SetupEvents();
+            SubscribeToThemeChanges();
+        }
+
+        public UTKDropdown(string label, List<string>? options = null) : this()
+        {
+            this.label = label;
+            if (options != null)
+            {
+                choices = options;
+            }
+        }
+        #endregion
+
+        #region Setup
+        private void SetupStyles()
+        {
+            AddToClassList("utk-dropdown");
+        }
+
+        private void SetupEvents()
+        {
+            this.RegisterValueChangedCallback(OnDropdownValueChanged);
+        }
+
+        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 OnDropdownValueChanged(ChangeEvent<string> evt)
+        {
+            OnSelectionChanged?.Invoke(index, evt.newValue);
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// 옵션 목록 설정
+        /// </summary>
+        public void SetOptions(List<string> options)
+        {
+            choices = options ?? new List<string>();
+        }
+
+        /// <summary>
+        /// 옵션 추가
+        /// </summary>
+        public void AddOption(string option)
+        {
+            var list = new List<string>(choices) { option };
+            choices = list;
+        }
+
+        /// <summary>
+        /// 값으로 선택
+        /// </summary>
+        public void SetSelectedValue(string? selectedValue, bool notify = true)
+        {
+            if (selectedValue == null)
+            {
+                index = -1;
+                return;
+            }
+
+            var idx = choices.IndexOf(selectedValue);
+            if (idx >= 0)
+            {
+                if (notify)
+                {
+                    index = idx;
+                }
+                else
+                {
+                    SetValueWithoutNotify(selectedValue);
+                }
+            }
+        }
+        #endregion
+
+        #region IDisposable
+        public void Dispose()
+        {
+            if (_disposed) return;
+            _disposed = true;
+
+            UTKThemeManager.Instance.OnThemeChanged -= OnThemeChanged;
+            OnSelectionChanged = null;
+        }
+        #endregion
+    }
+}