UI 자동화를 위해 바인딩 기능 구현

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Packages/com.unity.inputsystem/InputSystem/Editor/Internal/AdvancedDropdown/AdvancedDropdown.cs

@@ -0,0 +1,78 @@
+#if UNITY_EDITOR
+using System.Collections.Generic;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal abstract class AdvancedDropdown
+    {
+        protected Vector2 minimumSize { get; set; }
+        protected Vector2 maximumSize { get; set; }
+
+        internal AdvancedDropdownWindow m_WindowInstance;
+        internal AdvancedDropdownState m_State;
+        internal AdvancedDropdownDataSource m_DataSource;
+        internal AdvancedDropdownGUI m_Gui;
+
+        public AdvancedDropdown(AdvancedDropdownState state)
+        {
+            m_State = state;
+        }
+
+        public void Show(Rect rect)
+        {
+            if (m_WindowInstance != null)
+            {
+                m_WindowInstance.Close();
+                m_WindowInstance = null;
+            }
+            if (m_DataSource == null)
+            {
+                m_DataSource = new CallbackDataSource(BuildRoot, BuildCustomSearch);
+            }
+            if (m_Gui == null)
+            {
+                m_Gui = new AdvancedDropdownGUI();
+            }
+
+            m_WindowInstance = ScriptableObject.CreateInstance<AdvancedDropdownWindow>();
+            if (minimumSize != Vector2.zero)
+                m_WindowInstance.minSize = minimumSize;
+            if (maximumSize != Vector2.zero)
+                m_WindowInstance.maxSize = maximumSize;
+            m_WindowInstance.state = m_State;
+            m_WindowInstance.dataSource = m_DataSource;
+            m_WindowInstance.gui = m_Gui;
+            m_WindowInstance.windowClosed +=
+                w => { ItemSelected(w.GetSelectedItem()); };
+            m_WindowInstance.windowDestroyed += OnDestroy;
+            m_WindowInstance.Init(rect);
+        }
+
+        public void Reload()
+        {
+            m_WindowInstance?.ReloadData();
+        }
+
+        public void Repaint()
+        {
+            m_WindowInstance?.Repaint();
+        }
+
+        protected abstract AdvancedDropdownItem BuildRoot();
+
+        protected virtual AdvancedDropdownItem BuildCustomSearch(string searchString,
+            IEnumerable<AdvancedDropdownItem> elements)
+        {
+            return null;
+        }
+
+        protected virtual void ItemSelected(AdvancedDropdownItem item)
+        {
+        }
+
+        protected virtual void OnDestroy()
+        {
+        }
+    }
+}
+#endif