2025-05-09 12:38:45 +09:00
34 changed files with 2878 additions and 81 deletions
--- a/Assets/Resources/Prefabs/UI/PRF_AssetLibraryItem.prefab
+++ b/Assets/Resources/Prefabs/UI/PRF_AssetLibraryItem.prefab
--- a/Assets/Resources/Prefabs/UI/PRF_AssetLibraryItem.prefab.meta
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  m_PrefabInstance: {fileID: 1712022042}
  m_PrefabAsset: {fileID: 0}
+--- !u!1 &1712223849 stripped
+GameObject:
+  m_CorrespondingSourceObject: {fileID: 712989226239373666, guid: a2cabb78a78db4a4fa8074f87fa77991, type: 3}
+  m_PrefabInstance: {fileID: 307970698}
+  m_PrefabAsset: {fileID: 0}
+--- !u!114 &1712223851
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1712223849}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 448ec7391867608489f206f58b3630af, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  searchInput: {fileID: 713159441}
+  onSelect:
+    m_PersistentCalls:
+      m_Calls: []
+  onParentChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  onHover:
+    m_PersistentCalls:
+      m_Calls: []
+  isSiblingEditable: 1
+--- !u!114 &1712223852
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1712223849}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: cab9a4db9e60ee84f94fb7ae134fbcc5, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_Content: {fileID: 756595188}
+  m_Horizontal: 1
+  m_Vertical: 1
+  m_MovementType: 1
+  m_Elasticity: 0.1
+  m_Inertia: 1
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+  m_ScrollSensitivity: 10
+  m_Viewport: {fileID: 974887642}
+  m_HorizontalScrollbar: {fileID: 0}
+  m_VerticalScrollbar: {fileID: 378374035}
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+  m_VerticalScrollbarVisibility: 2
+  m_HorizontalScrollbarSpacing: 0
+  m_VerticalScrollbarSpacing: 0
+  m_OnValueChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  passDragToChildren: 1
+  setToChildItem:
+    m_PersistentCalls:
+      m_Calls: []
+  setToPriorSiblingItem:
+    m_PersistentCalls:
+      m_Calls: []
+  setToNextSiblingItem:
+    m_PersistentCalls:
+      m_Calls: []
+  onDragBegin:
+    m_PersistentCalls:
+      m_Calls: []
+  onDragAndDrop:
+    m_PersistentCalls:
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+  itemPopup: {fileID: 0}
+  menuPopup: {fileID: 0}
+  onExit:
+    m_PersistentCalls:
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 --- !u!224 &1715748516 stripped
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--- a/Assets/Scripts/Studio/AssetTool/CustomAssetConnector.cs
+++ b/Assets/Scripts/Studio/AssetTool/CustomAssetConnector.cs
@@ -11,15 +11,16 @@ using UnityEditor;
 using System;
 using XED.Core;
 using System.Collections;
+using XED.AssetLibraryTree;

 namespace XED.Asset
 {
    public class CustomAssetConnector : Manager
    {
-        public PooledScrollView assetScrollView;
-        public CustomScrollRect assetScrollRect;
-        public PooledScrollView componentScrollView;
-        public PooledScrollView InterworkingDataScrollView;
+        public AssetLibraryPooledScrollView assetScrollView;
+        public AssetLibraryScrollRect assetScrollRect;
+        public HierarchyPooledScrollView componentScrollView;
+        public HierarchyPooledScrollView InterworkingDataScrollView;
        public Panel_ObjectDistance panel_ObjectDistance;
        public GameObject renderObjectPrefab;
        public float objectShowDistance = 1000.0f;
@@ -98,7 +99,7 @@ namespace XED.Asset
            }
        }

-        public void OnAssetSelected(HierarchyItem item)
+        public void OnAssetSelected(AssetLibraryItem item)
        {
            if (item == null || item.linkedObject == null)
            {
@@ -123,7 +124,7 @@ namespace XED.Asset
            selectedAssetData.AddTransformToRender(selectedItem.transform);
            CoroutineRunner.instance.StartCoroutine(ChangeSelectedAssetTransform());
        }
-        public void OnAssetDropped(HierarchyItem item)
+        public void OnAssetDropped(AssetLibraryItem item)
        {
            if (selectedAssetData == null)
                return;
@@ -171,7 +172,7 @@ namespace XED.Asset
        }
        public void OnLoadAsset(AssetData asset)
        {
-            HierarchyItem item = assetScrollView.FindItem(asset.name, HierarchyItemType.file);
+            AssetLibraryItem item = assetScrollView.FindItem(asset.name, AssetLibraryItemType.file);
            OnAssetSelected(item);
            selectRenderObject.transform.position = new Vector3(asset.position.x, asset.position.y, asset.position.z);
            selectRenderObject.transform.eulerAngles = new Vector3(asset.rotation.x, asset.rotation.y, asset.rotation.z);
--- a/Assets/Scripts/Studio/AssetTool/CustomAssetDataHandler.cs
+++ b/Assets/Scripts/Studio/AssetTool/CustomAssetDataHandler.cs
@@ -1,4 +1,5 @@
 using XED.Asset;
+using XED.AssetLibraryTree;
 using XED.HierarchyTree;
 using XED.Manage;
 using XED.Util;
@@ -10,8 +11,8 @@ namespace XED
        public void OnLoadFbxFile(string objectName, string folderName, CustomAssetData assetData)
        {
            var connector = ManagerHub.instance.Get<CustomAssetConnector>();
-            HierarchyItem parent = connector.assetScrollView.FindItem(folderName, HierarchyItemType.folder) ?? connector.assetScrollView.AddItem(folderName, null, HierarchyItemType.folder);
-            HierarchyItem item = connector.assetScrollView.AddItem(objectName, assetData.gameObject, HierarchyItemType.file, parent);
+            AssetLibraryItem parent = connector.assetScrollView.FindItem(folderName, AssetLibraryItemType.folder) ?? connector.assetScrollView.AddItem(folderName, null, AssetLibraryItemType.folder);
+            AssetLibraryItem item = connector.assetScrollView.AddItem(objectName, assetData.gameObject, AssetLibraryItemType.file, parent);
            assetData.onLoadProgress.RemoveAllListeners();
            assetData.onLoadProgress.AddListener((x) => item.onLoadProgress?.Invoke(x));
        }
@@ -19,7 +20,7 @@ namespace XED
        public void OnRemoveFbxFile(string objectName)
        {
            var connector = ManagerHub.instance.Get<CustomAssetConnector>();
-            connector.assetScrollView.RemoveItem(objectName, HierarchyItemType.file);
+            connector.assetScrollView.RemoveItem(objectName, AssetLibraryItemType.file);
        }

        public void SaveSelectedAssetDatasToLocal()
--- a/Assets/Scripts/Studio/AssetTool/CustomAssetEventHandler.cs
+++ b/Assets/Scripts/Studio/AssetTool/CustomAssetEventHandler.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using UnityEngine;
+using XED.AssetLibraryTree;
 using XED.HierarchyTree;
 using XED.Manage;
 using XED.Util;
@@ -36,7 +37,7 @@ namespace XED.Asset
            connector.OnSelectObjects(name, selectedObjects);
        }

-        public void OnSelectAssetFromHierarchy(List<HierarchyItem> selectedItems)
+        public void OnSelectAssetFromHierarchy(List<AssetLibraryItem> selectedItems)
        {
            var connector = ManagerHub.instance.Get<CustomAssetConnector>();
            connector.selectedAssetDatas.Clear();
@@ -46,7 +47,7 @@ namespace XED.Asset
            }
            for (int i = 0; i < selectedItems.Count; i++)
            {
-                HierarchyItem assetItem = selectedItems[i];
+                AssetLibraryItem assetItem = selectedItems[i];
                CustomAssetData assetData = null;
                if (assetItem.linkedObject)
                {
--- a/Assets/Scripts/Studio/UI/Panel/Panel_AssetLibrary.cs
+++ b/Assets/Scripts/Studio/UI/Panel/Panel_AssetLibrary.cs
@@ -2,19 +2,20 @@ using UnityEngine;
 using XRLib.UI;
 using XED.HierarchyTree;
 using UnityEngine.UI;
+using XED.AssetLibraryTree;

 namespace XED.UI
 {
    public class Panel_AssetLibrary : PanelBase
    {
-        public CustomScrollRect scrollRect;
-        public PooledScrollView scrollView;
+        public AssetLibraryScrollRect scrollRect;
+        public AssetLibraryPooledScrollView scrollView;
        public Button Button_Close;

        private void Awake()
        {
-            scrollRect = GetComponentInChildren<CustomScrollRect>();
-            scrollView = GetComponentInChildren<PooledScrollView>();
+            scrollRect = GetComponentInChildren<AssetLibraryScrollRect>();
+            scrollView = GetComponentInChildren<AssetLibraryPooledScrollView>();
        }

        public override void AfterAwake()
--- a/Assets/Scripts/Studio/UI/Panel/Panel_AssetProperties.cs
+++ b/Assets/Scripts/Studio/UI/Panel/Panel_AssetProperties.cs
@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using TMPro;
 using UnityEngine;
 using UnityEngine.UI;
+using XED.AssetLibraryTree;
 using XED.HierarchyTree;
 using XED.Util;
 using XRLib.UI;
@@ -46,7 +47,7 @@ namespace XED.UI
            onClickPreview?.Invoke(testArray);
        }

-        public void Open(List<HierarchyItem> selectedItems)
+        public void Open(List<AssetLibraryItem> selectedItems)
        {
            Init();

--- a/Assets/Scripts/Studio/UI/Panel/Panel_Hierarchy.cs
+++ b/Assets/Scripts/Studio/UI/Panel/Panel_Hierarchy.cs
@@ -8,14 +8,14 @@ namespace XED.UI
 {
    public class Panel_Hierarchy : PanelBase//UnityEngine.MonoBehaviour
    {
-        public CustomScrollRect scrollRect;
-        public PooledScrollView scrollView;
+        public HierarchyScrollRect scrollRect;
+        public HierarchyPooledScrollView scrollView;
        public Button Button_Close;

        private void Awake()
        {
-            scrollRect = GetComponentInChildren<CustomScrollRect>();
-            scrollView = GetComponentInChildren<PooledScrollView>();
+            scrollRect = GetComponentInChildren<HierarchyScrollRect>();
+            scrollView = GetComponentInChildren<HierarchyPooledScrollView>();
        }

        public override void AfterAwake()
--- a/Assets/Scripts/Studio/UI/Panel/Panel_InterworkingDataList.cs
+++ b/Assets/Scripts/Studio/UI/Panel/Panel_InterworkingDataList.cs
@@ -8,14 +8,14 @@ namespace XED.UI
 {
    public class Panel_InterworkingDataList : PanelBase
    {
-        public CustomScrollRect scrollRect;
-        public PooledScrollView scrollView;
+        public HierarchyScrollRect scrollRect;
+        public HierarchyPooledScrollView scrollView;
        public Button Button_Close;

        private void Awake()
        {
-            scrollRect = GetComponentInChildren<CustomScrollRect>();
-            scrollView = GetComponentInChildren<PooledScrollView>();
+            scrollRect = GetComponentInChildren<HierarchyScrollRect>();
+            scrollView = GetComponentInChildren<HierarchyPooledScrollView>();
        }

        public override void AfterAwake()
--- a/Assets/Scripts/Studio/UI/Panel/Panel_Thumbnail.cs
+++ b/Assets/Scripts/Studio/UI/Panel/Panel_Thumbnail.cs
@@ -1,9 +1,7 @@
-using Ookii.Dialogs;
 using System;
 using UnityEngine;
 using UnityEngine.UI;
-using UnityEngine.UIElements;
-using XED.HierarchyTree;
+using XED.AssetLibraryTree;
 using XED.Util;
 using XRLib.UI;

@@ -22,7 +20,7 @@ namespace XED.UI
        {
            canvas = GetComponentInParent<Canvas>();
        }
-        public void HandleOpenClose(HierarchyItem selectedItem)
+        public void HandleOpenClose(AssetLibraryItem selectedItem)
        {
            if (selectedItem == null)
            {
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryItem.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryItem.cs
@@ -0,0 +1,218 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+
+namespace XED.AssetLibraryTree
+{
+    public enum AssetLibraryItemType
+    {
+        none, folder, file, obj, fbx, data
+    }
+    public class AssetLibraryItem
+    {
+        public string name;
+        public int layerNum;
+        public AssetLibraryItem parent;
+        public GameObject linkedObject; 
+        public List<AssetLibraryItem> children;
+        public bool isExpanded = true;
+        public AssetLibraryItemType type;
+        public UnityEvent<AssetLibraryItem, AssetLibraryItem> onParentChanged;
+        public UnityEvent<float> onLoadProgress = new UnityEvent<float>();
+        public AssetLibraryItem(string name)
+        {
+            this.name = name;
+            children = new List<AssetLibraryItem>();
+        }
+        public AssetLibraryItem(string name, int layerNum)
+        {
+            this.name = name;
+            this.layerNum = layerNum;
+            children = new List<AssetLibraryItem>();
+        }
+        public AssetLibraryItem(AssetLibraryItem item)
+        { 
+            this.name = item.name;
+            this.layerNum = item.layerNum;
+            this.parent = item.parent;
+            this.isExpanded = false;
+            this.type = item.type;
+            this.onParentChanged = item.onParentChanged;
+            children = new List<AssetLibraryItem>();
+            for (int i = 0; i < item.children.Count; i++)
+            {
+                AssetLibraryItem copyChild = item.children[i].Copy();
+                children.Add(copyChild);
+                copyChild.parent = this;
+            } 
+            ResetLayerNum();
+        }
+        public void AddChild(AssetLibraryItem item, int index = -1)
+        {
+            if (HasChildItem(item)) return;
+            if (index < 0 || index >= children.Count) children.Add(item);
+            else children.Insert(index, item);
+            item.parent = this;
+            item.ResetLayerNum();
+            onParentChanged?.Invoke(this, item);
+        }
+        public void AddToPriorSibling(AssetLibraryItem item)
+        {
+            if (parent == null) return;
+            int index = parent.children.FindIndex(x => x == this);
+            parent.children.Insert(index, item);
+            if (item.parent != parent)
+            {
+                onParentChanged?.Invoke(parent, item);
+                item.parent = parent;
+            }
+            item.ResetLayerNum();
+        }
+        public void AddToNextSibling(AssetLibraryItem item)
+        {
+            if (parent == null) return;
+            int index = parent.children.FindIndex(x => x == this);
+            if (index >= 0 && index == parent.children.Count - 1)
+            {
+                parent.AddChild(item);
+            }
+            else
+            {
+                parent.children.Insert(index + 1, item);
+            }
+            if (item.parent != parent)
+            {
+                onParentChanged?.Invoke(parent, item);
+                item.parent = parent;
+            } 
+            item.ResetLayerNum();
+        }
+        public bool RemoveItem(AssetLibraryItem item)
+        {
+            if (item == null) return false;
+            if (children.Contains(item))
+            {
+                children.Remove(item);
+                return true;
+            }
+            foreach (AssetLibraryItem childItem in children)
+            {
+                if (childItem.RemoveItem(item))
+                    return true;
+            }
+            return false;
+        }
+        public void ResetLayerNum()
+        {
+            layerNum = parent.layerNum + 1;
+            foreach (AssetLibraryItem childItem in children)
+            {
+                childItem.ResetLayerNum();
+            }
+        }
+        public List<AssetLibraryItem> GetAll(bool includeCollapsed = false)
+        {
+            List<AssetLibraryItem> items = new List<AssetLibraryItem>();
+            AssetLibraryItem node = GetNext(includeCollapsed);
+            while (node != null && node.layerNum > layerNum)
+            {
+                items.Add(node);
+                node = node.GetNext(includeCollapsed);
+            }
+            return items;
+        } 
+        public AssetLibraryItem Find(string name, AssetLibraryItemType type = AssetLibraryItemType.none)
+        {
+            AssetLibraryItem node = GetNext(true);
+            while (node != null && node.layerNum != layerNum)
+            {
+                if (node.name.Equals(name) && (type == AssetLibraryItemType.none || type == node.type))
+                {
+                    return node;
+                }
+                node = node.GetNext(true);
+            }
+            return null;
+        }
+        public List<AssetLibraryItem> FindAll(string name)
+        {
+            List<AssetLibraryItem> items = new List<AssetLibraryItem>();
+            AssetLibraryItem node = GetNext(true);
+            while (node != null && node.layerNum != layerNum)
+            {
+                if (node.name.Contains(name))
+                    items.Add(node);
+                node = node.GetNext(true);
+            }
+            return items;
+        }
+        public void ExpandInHierarchy()
+        {
+            AssetLibraryItem parentItem = parent;
+            while (parentItem != null)
+            {
+                parentItem.isExpanded = true;
+                parentItem = parentItem.parent;
+            }
+        }
+        public AssetLibraryItem GetNext(bool includeCollapsed = false)
+        {
+            if (children.Count > 0 && (isExpanded || includeCollapsed)) return children[0];
+            if (parent == null) return null;
+            return parent.GetNext(this);
+        }
+        public AssetLibraryItem GetNext(AssetLibraryItem item)
+        {
+            int index = children.FindIndex(x => x == item); 
+            if (index == -1)
+            {
+                return null;
+            }
+            if (index >= 0 && index == children.Count - 1)
+            {
+                if (parent == null) return null;
+                return parent.GetNext(this);
+            }
+            return children[index + 1];
+        }
+        public AssetLibraryItem GetNextSibling()
+        {
+            if (parent == null) return null;
+            int index = GetSiblingIndex();
+            if (index == parent.children.Count - 1)
+            {
+                return null;
+            }
+            return parent.children[index + 1];
+        }
+        public bool HasChildItem(AssetLibraryItem item)
+        {
+            return GetAll(true).Contains(item);
+        }
+        public int GetSiblingIndex()
+        {
+            return parent.children.FindIndex(x => x == this);
+        }
+        public int GetItemIndexInHierarchy(AssetLibraryItem item)
+        {
+            int index = 0;
+            AssetLibraryItem node = GetNext(true);
+            while (node != null && node.layerNum > layerNum)
+            { 
+                if (node == item)
+                {
+                    break;
+                }
+                node = node.GetNext(true);
+                index++;
+            }
+            return index;
+        }
+        public AssetLibraryItem Copy()
+        {
+            AssetLibraryItem copyItem = new AssetLibraryItem(this);
+            return copyItem;
+        }
+    }
+}
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryItem.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryItem.cs.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 02c8aba09b6cf79448d6d0699308f932
+guid: cc3b811d06dede948a51fd4990d95cd8
 MonoImporter:
  externalObjects: {}
  serializedVersion: 2
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPooledScrollView.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPooledScrollView.cs
@@ -0,0 +1,525 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Pool;
+using UnityEngine.Events;
+using TMPro;
+using XED.Manage;
+using Unity.Hierarchy;
+using XED.Core;
+using XED.Command;
+
+namespace XED.AssetLibraryTree
+{
+    public class AssetLibraryPooledScrollView : MonoBehaviour
+    {
+        private RectTransform content;       // Content RectTransform of the ScrollView.
+        private AssetLibraryScrollRect scrollRect;       // ScrollRect component.
+        [SerializeField]
+        private TMP_InputField searchInput;
+        //private Button searchCancelButton;
+        private GameObject itemPrefab;       // Prefab for scroll items. 
+        private ObjectPool<AssetLibraryScrollItemUI> pool;  // Pool for UI items.
+        private List<AssetLibraryItem> data = new List<AssetLibraryItem>();   // The list of hierarchy items.
+        private AssetLibraryItem root;
+
+        private List<AssetLibraryScrollItemUI> activeItems = new List<AssetLibraryScrollItemUI>();
+        public List<AssetLibraryItem> selectedItems = new List<AssetLibraryItem>();
+        private AssetLibraryItem lastSelectedItem = null;
+
+        private float itemHeight;           // Height of a single item.
+        private int visibleItemCount;       // Number of visible items that fit in the viewport.
+        private int currentIndex = -1;       // The index of the first visible item.  
+
+        public UnityEvent<List<AssetLibraryItem>> onSelect;
+        public UnityEvent<AssetLibraryItem, AssetLibraryItem> onParentChanged;
+        public UnityEvent<AssetLibraryItem> onHover;
+
+        public bool isSiblingEditable;
+
+        private void Awake()
+        {
+            content = Find<RectTransform>("Content");
+            scrollRect = GetComponent<AssetLibraryScrollRect>();
+            if (searchInput == null) 
+            {
+                searchInput = GetComponentInChildren<TMP_InputField>();
+            }
+            //searchCancelButton = UtilityFunction.FindDeepChild(transform, "Button_SearchBar").GetComponent<Button>();
+            itemPrefab = Resources.Load<GameObject>("Prefabs/UI/PRF_AssetLibraryItem");
+
+            //스크롤 뷰에 사용될 오브젝트 풀을 미리 20개 생성
+            pool = new ObjectPool<AssetLibraryScrollItemUI>(
+                createFunc: () => Instantiate(itemPrefab).GetComponent<AssetLibraryScrollItemUI>(),
+                actionOnGet: (item) => item.gameObject.SetActive(true),
+                actionOnRelease: (item) => item.gameObject.SetActive(false),
+                actionOnDestroy: (item) => Destroy(item.gameObject),
+                defaultCapacity: 20,
+                maxSize: 40);
+
+            root = new AssetLibraryItem("Root", -1);
+            root.onParentChanged = onParentChanged; 
+        }
+        private void Start()
+        {  
+            //스크롤뷰의 값이 변할때마다 내용물 갱신해주는 함수 콜백 추가
+            scrollRect.onValueChanged.AddListener(OnScrollValueChanged);
+            scrollRect.setToChildItem.AddListener(SetToChildItem);
+            scrollRect.setToPriorSiblingItem.AddListener(SetToPriorSiblingItem);
+            scrollRect.setToNextSiblingItem.AddListener(SetToNextSiblingItem); 
+            //아이템 하나당 높이값 저장
+            itemHeight = itemPrefab.GetComponent<RectTransform>().rect.height;
+            //뷰포트에 몇개의 아이템이 보이는지 한개의 여유분을 두고 계산
+            visibleItemCount = Mathf.CeilToInt(scrollRect.GetComponent<RectTransform>().sizeDelta.y / itemHeight) + 1;
+
+            searchInput.onValueChanged.AddListener(SearchData);
+            //searchCancelButton.onClick.RemoveAllListeners();
+            //searchCancelButton.onClick.AddListener(CancelSearch); 
+
+            ResetData();
+        } 
+        public AssetLibraryItem AddItem(string name, GameObject linkedObject, AssetLibraryItemType type, AssetLibraryItem parent = null)
+        {
+            AssetLibraryItem tempItem = new AssetLibraryItem(name);
+            tempItem.linkedObject = linkedObject;
+            tempItem.type = type;
+            tempItem.onParentChanged = onParentChanged;
+            if (parent == null)
+            {
+                root.AddChild(tempItem); 
+            }
+            else
+            {
+                parent.AddChild(tempItem);
+            }
+            ResetData();
+            return tempItem;
+        }
+        public void AddItem(AssetLibraryItem item)
+        {
+            root.AddChild(item);
+            ResetData();
+        }
+        public AssetLibraryItem AddItem(string name, AssetLibraryItemType type)
+        {
+            AssetLibraryItem item = new AssetLibraryItem(name);
+            item.type = type;
+            root.AddChild(item);
+            ResetData();
+            return item;
+        }
+        public void AttachItem(AssetLibraryItem parent, AssetLibraryItem item, int index = -1)
+        {
+            if (parent.HasChildItem(item))
+                return;
+            parent.AddChild(item, index);
+            ResetData();
+        }
+        public void RemoveItem(AssetLibraryItem removeItem)
+        { 
+            root.RemoveItem(removeItem);
+            ResetData();
+        }
+        public void RemoveItem(string name, AssetLibraryItemType type)
+        {
+            AssetLibraryItem removeItem = FindItem(name, type);
+            root.RemoveItem(removeItem);
+            ResetData();
+        }
+        public List<AssetLibraryItem> GetAllItems()
+        {
+            return root.GetAll(true);
+        }
+        public int GetItemIndex(AssetLibraryItem item)
+        {
+            return root.GetItemIndexInHierarchy(item);
+        }
+        public bool HasItem(AssetLibraryItem item)
+        {
+            return root.HasChildItem(item);
+        }
+        public AssetLibraryItem FindItem(string name, AssetLibraryItemType type)
+        {
+            return root.Find(name, type);
+        }
+        public void SetData()
+        {
+            data.Clear();
+            data = root.GetAll();
+            RebuildVisibleItems();
+        }
+        public void ResetData()
+        {
+            data.Clear();
+            data = root.GetAll();
+            currentIndex = -1;
+            RebuildVisibleItems();
+        }
+        public void SetData(List<AssetLibraryItem> hierarchyData)
+        {
+            data = hierarchyData;
+            RebuildVisibleItems();
+        }
+
+        private void OnScrollValueChanged(Vector2 scrollPos)
+        {
+            RebuildVisibleItems();
+        }
+
+        private void RebuildVisibleItems()
+        {
+            float scrollY = content.anchoredPosition.y;
+            int newIndex = Mathf.FloorToInt(scrollY / itemHeight);
+            if (newIndex < 0)
+            {
+                scrollY = 0;
+                newIndex = 0;
+            }
+
+            // If the visible index hasn't changed, do nothing.
+            if (newIndex == currentIndex) return;
+
+            currentIndex = newIndex;
+
+            // Clear and recycle active items.
+            foreach (var item in activeItems)
+            {
+                pool.Release(item);
+            }
+            activeItems.Clear();
+            if (data.Count == 0)
+                return;
+
+            int startIndex = Mathf.Clamp(currentIndex, 0, data.Count - 1);
+            int endIndex = Mathf.Clamp(currentIndex + visibleItemCount, 0, data.Count);
+            SetScrollItemUI(startIndex, endIndex);
+        }
+        private void RebuildVisibleItems(AssetLibraryItem focusItem)
+        {
+            int newIndex = data.FindIndex((x) => x == focusItem);
+            currentIndex = newIndex;
+            content.anchoredPosition = new Vector2(content.anchoredPosition.x, currentIndex * itemHeight);
+
+            // Clear and recycle active items.
+            foreach (var item in activeItems)
+            {
+                pool.Release(item);
+            }
+            activeItems.Clear();
+            if (data.Count == 0)
+                return;
+
+            int startIndex = Mathf.Clamp(currentIndex, 0, data.Count - 1);
+            int endIndex = Mathf.Clamp(currentIndex + visibleItemCount, 0, data.Count);
+            SetScrollItemUI(startIndex, endIndex);
+        }
+        private void SetScrollItemUI(int startIndex, int endIndex)
+        {
+            int maxWidth = Mathf.RoundToInt(scrollRect.GetComponent<RectTransform>().sizeDelta.x);
+            for (int i = startIndex; i < endIndex; i++)
+            {
+                AssetLibraryItem item = data[i];
+                AssetLibraryScrollItemUI itemUI = GetItemUI();
+                int w = itemUI.SetItemData(item);
+                itemUI.SetSelected(selectedItems);
+                if (w > maxWidth) maxWidth = w;
+                itemUI.transform.SetParent(content, false);
+
+                float yPos = -((float)i + 0.5f) * itemHeight;
+                itemUI.GetComponent<RectTransform>().anchoredPosition = new Vector2(0, yPos);
+
+                activeItems.Add(itemUI);
+            }
+
+            content.sizeDelta = new Vector2(maxWidth, data.Count * itemHeight);  // Set content height. 
+        }
+        private AssetLibraryScrollItemUI GetItemUI()
+        {
+            AssetLibraryScrollItemUI itemUI = pool.Get();
+            itemUI.onClickSingle.RemoveAllListeners();
+            itemUI.onClickSingle.AddListener(OnSelectSingle);
+            itemUI.onClickAddSingle.RemoveAllListeners();
+            itemUI.onClickAddSingle.AddListener(OnSelectAnother);
+            itemUI.onClickMultiple.RemoveAllListeners();
+            itemUI.onClickMultiple.AddListener(OnSelectMultiple);
+            itemUI.onToggleExpand.RemoveAllListeners();
+            itemUI.onToggleExpand.AddListener(OnToggleExpand);
+            itemUI.onHover.AddListener(OnHover);
+            return itemUI;
+        }
+        public void OnSelect(List<AssetLibraryItem> items)
+        {
+            selectedItems = items;
+            foreach (var itemUI in activeItems)
+            {
+                itemUI.SetSelected(items);
+            }
+        }
+        public void OnSelectSingle(AssetLibraryItem item)
+        {
+            if (selectedItems.Count == 1 && selectedItems[0] == item)
+            {
+                selectedItems.Clear();
+            }
+            else
+            {
+                selectedItems.Clear();
+                selectedItems.Add(item);
+            }
+            foreach (var itemUI in activeItems)
+            {
+                itemUI.SetSelected(selectedItems);
+            }
+            lastSelectedItem = item;
+            onSelect?.Invoke(selectedItems);
+        }
+        public void OnHover(AssetLibraryItem item)
+        {
+            onHover?.Invoke(item);
+        }
+        public void OnSelectAnother(AssetLibraryItem item)
+        {
+            if (selectedItems.Count == 1 && selectedItems[0] == item)
+            {
+                selectedItems.Clear();
+            }
+            else if (selectedItems.Count > 1 && selectedItems.Contains(item))
+            {
+                selectedItems.Remove(item);
+            }
+            else
+            {
+                selectedItems.Add(item);
+            }
+            foreach (var itemUI in activeItems)
+            {
+                itemUI.SetSelected(selectedItems);
+            }
+            lastSelectedItem = item;
+            onSelect?.Invoke(selectedItems);
+        }
+        public void OnSelectMultiple(AssetLibraryItem item)
+        { 
+            int lastSelectedIndex = 0;
+            if (lastSelectedItem != null)
+            {
+                lastSelectedIndex = data.FindIndex(x => x == lastSelectedItem);
+            } 
+            //int lowestIndex = data
+            //    .Select((data, index) => new { data, index })
+            //    .Where(pair => selectedItems.Contains(pair.data))
+            //    .Min(pair => pair.index);
+            int currentIndex = data.FindIndex(x => x == item);
+            int startIndex = currentIndex > lastSelectedIndex ? lastSelectedIndex : currentIndex;
+            int endIndex = currentIndex > lastSelectedIndex ? currentIndex : lastSelectedIndex;
+            selectedItems.Clear(); 
+            for (int i = startIndex; i <= endIndex; i++)
+            {
+                AssetLibraryItem tempItem = data[i];
+                selectedItems.Add(tempItem);
+            }
+            foreach (var itemUI in activeItems)
+            {
+                itemUI.SetSelected(selectedItems);
+            }
+            onSelect?.Invoke(selectedItems);
+        }
+        public void DeselectAll()
+        {
+            foreach (var itemUI in activeItems)
+            {
+                itemUI.SetSelected(false);
+            }
+            selectedItems.Clear();
+            onSelect?.Invoke(selectedItems);
+            lastSelectedItem = null;
+        }
+        public void OnToggleExpand()
+        {
+            currentIndex = -1;
+            SetData();
+        }
+        public void SetToChildItem(AssetLibraryItem srcItem, AssetLibraryItem destItem)
+        {
+            if (srcItem == null || destItem == null || !isSiblingEditable)
+                return;
+            if (selectedItems.Contains(srcItem))
+            {
+                for (int i = 0; i < selectedItems.Count; i++)
+                {
+                    AssetLibraryItem selectedItem = selectedItems[i];
+                    if (selectedItem == destItem || selectedItem.HasChildItem(destItem))
+                        continue;
+
+                    AssetLibraryItem oldParent = selectedItem.parent;
+                    int oldIndex = selectedItem.GetSiblingIndex();
+                    var command = new ActionCommand(
+                        () =>
+                        {
+                            root.RemoveItem(selectedItem);
+                            destItem.AddChild(selectedItem);
+                            ResetData();
+                        },
+                        () =>
+                        {
+                            root.RemoveItem(selectedItem);
+                            oldParent.AddChild(selectedItem, oldIndex);
+                            ResetData();
+                        });
+                    CommandInvoker.instance.Invoke(command);
+                }
+            }
+            else
+            {
+                if (srcItem == destItem || srcItem.HasChildItem(destItem))
+                    return;
+
+                AssetLibraryItem oldParent = srcItem.parent;
+                int oldIndex = srcItem.GetSiblingIndex();
+                var command = new ActionCommand(
+                    () =>
+                    {
+                        root.RemoveItem(srcItem);
+                        destItem.AddChild(srcItem);
+                        ResetData();
+                    },
+                    () =>
+                    {
+                        root.RemoveItem(srcItem);
+                        oldParent.AddChild(srcItem, oldIndex);
+                        ResetData();
+                    });
+                CommandInvoker.instance.Invoke(command);
+            } 
+        }
+        public void SetToNextSiblingItem(AssetLibraryItem srcItem, AssetLibraryItem destItem)
+        {
+            if (srcItem == null || destItem == null || !isSiblingEditable)
+                return;
+            if (selectedItems.Contains(srcItem))
+            {
+                for (int i = 0; i < selectedItems.Count; i++)
+                {
+                    AssetLibraryItem selectedItem = selectedItems[i];
+                    if (selectedItem == destItem || selectedItem.HasChildItem(destItem))
+                        continue;
+
+                    AssetLibraryItem oldParent = selectedItem.parent;
+                    int oldIndex = selectedItem.GetSiblingIndex();
+                    var command = new ActionCommand(
+                        () =>
+                        {
+                            root.RemoveItem(selectedItem);
+                            destItem.AddToNextSibling(selectedItem);
+                            ResetData();
+                        },
+                        () =>
+                        {
+                            root.RemoveItem(selectedItem);
+                            oldParent.AddChild(selectedItem, oldIndex);
+                            ResetData();
+                        });
+                    CommandInvoker.instance.Invoke(command); 
+                }
+            }
+            else
+            {
+                if (srcItem == destItem || srcItem.HasChildItem(destItem))
+                    return;
+
+                AssetLibraryItem oldParent = srcItem.parent;
+                int oldIndex = srcItem.GetSiblingIndex();
+                var command = new ActionCommand(
+                    () =>
+                    {
+                        root.RemoveItem(srcItem);
+                        destItem.AddToNextSibling(srcItem);
+                        ResetData();
+                    },
+                    () =>
+                    {
+                        root.RemoveItem(srcItem);
+                        oldParent.AddChild(srcItem, oldIndex);
+                        ResetData();
+                    });
+                CommandInvoker.instance.Invoke(command); 
+            } 
+        }
+        public void SetToPriorSiblingItem(AssetLibraryItem srcItem, AssetLibraryItem destItem)
+        {
+            if (srcItem == null || destItem == null || !isSiblingEditable)
+                return;
+            if (selectedItems.Contains(srcItem))
+            {
+                for (int i = 0; i < selectedItems.Count; i++)
+                {
+                    AssetLibraryItem selectedItem = selectedItems[i];
+                    if (selectedItem == destItem || selectedItem.HasChildItem(destItem))
+                        continue;
+
+                    AssetLibraryItem oldParent = selectedItem.parent;
+                    int oldIndex = selectedItem.GetSiblingIndex();
+                    var command = new ActionCommand(
+                        () =>
+                        {
+                            root.RemoveItem(selectedItem);
+                            destItem.AddToPriorSibling(selectedItem);
+                            ResetData();
+                        },
+                        () =>
+                        {
+                            root.RemoveItem(selectedItem);
+                            oldParent.AddChild(selectedItem, oldIndex);
+                            ResetData();
+                        });
+                    CommandInvoker.instance.Invoke(command); 
+                }
+            }
+            else
+            {
+                if (srcItem == destItem || srcItem.HasChildItem(destItem))
+                    return;
+
+                AssetLibraryItem oldParent = srcItem.parent;
+                int oldIndex = srcItem.GetSiblingIndex();
+                var command = new ActionCommand(
+                    () =>
+                    {
+                        root.RemoveItem(srcItem);
+                        destItem.AddToPriorSibling(srcItem);
+                        ResetData();
+                    },
+                    () =>
+                    {
+                        root.RemoveItem(srcItem);
+                        oldParent.AddChild(srcItem, oldIndex);
+                        ResetData();
+                    });
+                CommandInvoker.instance.Invoke(command); 
+            } 
+        }
+        public void SearchData(string name)
+        {
+            data.Clear();
+            data = root.FindAll(name);
+            currentIndex = -1;
+            RebuildVisibleItems();
+        }
+        public void CancelSearch()
+        {
+            searchInput.text = "";
+            data.Clear();
+            currentIndex = -1;
+            if (selectedItems.Count == 1)
+            {
+                selectedItems[0].ExpandInHierarchy();
+                data = root.GetAll();
+                RebuildVisibleItems(selectedItems[0]);
+            }
+            else
+            {
+                data = root.GetAll();
+                RebuildVisibleItems();
+            }
+        }
+    }
+}
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPooledScrollView.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPooledScrollView.cs.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 834bc067b08ed824b8b859748bb27a8c
+guid: 5b91609659b374d4d89246a2b7f4f990
 MonoImporter:
  externalObjects: {}
  serializedVersion: 2
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPopupScrollViewItem.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPopupScrollViewItem.cs
@@ -0,0 +1,42 @@
+using System.Collections;
+using System.Collections.Generic; 
+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+using TMPro;
+
+namespace XED.AssetLibraryTree
+{
+    public class AssetLibraryPopupScrollViewItem : UnityEngine.MonoBehaviour
+    {
+        private AssetLibraryScrollRect scrollRect;
+        private TMP_Text text;
+        private Canvas canvas;
+        // Start is called before the first frame update
+        void Awake()
+        {
+            canvas = GetComponentInParent<Canvas>();
+            text = GetComponentInChildren<TMP_Text>();
+            scrollRect = GetComponentInParent<AssetLibraryScrollRect>();
+            scrollRect.itemPopup = gameObject;
+            gameObject.SetActive(false);
+        }
+
+        // Update is called once per frame
+        void Update()
+        {
+            if (scrollRect.sourceItem != null)
+            {
+                text.text = scrollRect.sourceItem.name;
+            }
+            // Position popup at the mouse position (convert screen point to UI point)
+            RectTransformUtility.ScreenPointToLocalPointInRectangle(
+                canvas.transform as RectTransform,
+                Input.mousePosition,
+                canvas.worldCamera,
+                out Vector2 pos
+            );
+            transform.position = canvas.transform.TransformPoint(pos);
+        }
+    }
+}
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPopupScrollViewItem.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryPopupScrollViewItem.cs.meta
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollItemUI.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollItemUI.cs
@@ -0,0 +1,215 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+using TMPro;
+using UnityEngine.EventSystems;
+using UnityEngine.Events;
+using System;
+using XRLib;
+
+namespace XED.AssetLibraryTree
+{
+    public class AssetLibraryScrollItemUI : UnityEngine.MonoBehaviour, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler//, IBeginDragHandler, IEndDragHandler,
+    {
+        public TMP_Text nameText;
+        public Image iconImage;
+        public Image loadProgress;
+        public Button expandButton;
+        public RectTransform paddingRT;
+        public Sprite spriteExpanded;
+        public Sprite spriteCollapsed;
+        public UnityEvent<AssetLibraryItem> onClickSingle;
+        public UnityEvent<AssetLibraryItem> onClickAddSingle;
+        public UnityEvent<AssetLibraryItem> onClickMultiple;
+        public UnityEvent<AssetLibraryItem> onHover;
+        public UnityEvent onToggleExpand;
+        public UnityEvent<AssetLibraryItem> onDragStart;
+        public UnityEvent<AssetLibraryItem> onDragEnd;
+        public UnityEvent<PointerEventData> onScroll; 
+        public Color selectedColor;
+        public Color hoverColor;
+        public AssetLibraryItem currentItem;
+        public Image upperLine;
+        public Image lowerLine;
+        public Color lineColor;
+        public GameObject highLight;
+        public List<HierarchyItemSprite> itemSprites;
+        private Image backgroundImage;
+        public bool isSelected;
+        private void Awake()
+        {
+            backgroundImage = GetComponent<Image>();
+        }
+        public int SetItemData(AssetLibraryItem item)
+        {
+            currentItem = item;
+            nameText.text = item.name;
+            currentItem.isExpanded = item.isExpanded;
+            item.onLoadProgress.RemoveAllListeners();
+            item.onLoadProgress.AddListener(OnLoadProgress);
+            loadProgress.gameObject.SetActive(false);
+            HierarchyItemSprite itemSprite = itemSprites.Find((x) => x.type == item.type);
+            if (itemSprite != null) iconImage.sprite = itemSprite.sprite;
+            expandButton.image.sprite = currentItem.isExpanded == true ? spriteExpanded : spriteCollapsed;
+
+            float width = nameText.GetComponent<RectTransform>().sizeDelta.x + iconImage.GetComponent<RectTransform>().sizeDelta.x;
+            float paddingSize = item.layerNum * expandButton.GetComponent<RectTransform>().sizeDelta.x;
+            if (item.children.Count > 0)
+            {
+                expandButton.gameObject.SetActive(true);
+                width += expandButton.GetComponent<RectTransform>().sizeDelta.x;
+            }
+            else
+            {
+                expandButton.gameObject.SetActive(false);
+                paddingSize += expandButton.GetComponent<RectTransform>().sizeDelta.x;
+            }
+            width += paddingSize;
+            paddingRT.sizeDelta = new Vector2(paddingSize, paddingRT.sizeDelta.y);
+            upperLine.GetComponent<RectTransform>().offsetMin = new Vector2(paddingSize, 0);
+            lowerLine.GetComponent<RectTransform>().offsetMin = new Vector2(paddingSize, 0);
+            return Mathf.RoundToInt(width); 
+        }
+        public void SetSelected(bool selected)
+        {
+            isSelected = selected;
+            if (isSelected)
+            {
+                backgroundImage.color = selectedColor;
+            }
+            else
+            {
+                backgroundImage.color = Color.clear;
+            }
+        }
+        public void SetSelected(List<AssetLibraryItem> selectedItems)
+        {
+            isSelected = selectedItems.Contains(currentItem);
+            if (isSelected)
+            {
+                backgroundImage.color = selectedColor;
+            }
+            else
+            { 
+                backgroundImage.color = Color.clear;
+            }
+        }
+        public void ToggleExpandCollapse()
+        {
+            currentItem.isExpanded = !currentItem.isExpanded;
+            expandButton.image.sprite = currentItem.isExpanded == true ? spriteExpanded : spriteCollapsed;
+            onToggleExpand?.Invoke();
+        }
+        public void OnPointerClick(PointerEventData eventData)
+        {
+            if (eventData.button == PointerEventData.InputButton.Left)
+            {
+                if (Input.GetKey(KeyCode.LeftControl))
+                {
+                    onClickAddSingle?.Invoke(currentItem);
+                }
+                else if (Input.GetKey(KeyCode.LeftShift))
+                {
+                    onClickMultiple?.Invoke(currentItem);
+                }
+                else
+                {
+                    onClickSingle?.Invoke(currentItem);
+                }
+             }
+        }
+        public void OnPointerEnter(PointerEventData eventData)
+        {
+            backgroundImage.color = isSelected? selectedColor : hoverColor;
+            onHover?.Invoke(currentItem);
+        }
+
+        public void OnPointerExit(PointerEventData eventData)
+        {
+            backgroundImage.color = isSelected? selectedColor : Color.clear;    
+        }
+
+        public void OnBeginDrag(BaseEventData data)
+        {
+            Debug.Log("DragStart " + currentItem.name);
+            onDragStart?.Invoke(currentItem);
+        }
+
+        public void OnEndDrag()
+        {
+            Debug.Log("DragEnd " + currentItem.name);
+            onDragEnd?.Invoke(currentItem);
+        }
+        public void OnEndDrag(BaseEventData data)
+        {
+            AssetLibraryScrollItemUI itemUI = GetDropTarget(data);
+            if (itemUI != null)
+                itemUI.OnEndDrag();
+        }
+        private AssetLibraryScrollItemUI GetDropTarget(BaseEventData data)
+        {
+            PointerEventData eventData = (PointerEventData)data;
+            PointerEventData pointerData = new PointerEventData(EventSystem.current)
+            {
+                position = eventData.position  
+            };
+
+            var results = new System.Collections.Generic.List<RaycastResult>();
+            EventSystem.current.RaycastAll(pointerData, results);  
+
+            foreach (var result in results)
+            {
+                AssetLibraryScrollItemUI itemUI = result.gameObject.GetComponent<AssetLibraryScrollItemUI>();
+                if (itemUI != null)  
+                {
+                    return itemUI;  
+                }
+            }
+
+            return null;
+        }
+        public void OnScroll(BaseEventData data)
+        {
+            PointerEventData eventData = (PointerEventData)data;
+            onScroll?.Invoke(eventData);
+        }
+        public void ActivateUpperHighlight()
+        {
+            upperLine.color = lineColor;
+        }
+        public void ActivateLowerHighlight()
+        {
+            lowerLine.color = lineColor; 
+        }
+        public void ActivateMidHighlight()
+        {
+            highLight.SetActive(true);
+        }
+        public void DeactivateAllHighlights()
+        {
+            upperLine.color = Color.clear;
+            lowerLine.color = Color.clear;
+            highLight.SetActive(false);
+        }
+        public void OnLoadProgress(float ratio)
+        {
+            if (ratio == 1.0f)
+            {
+                loadProgress.gameObject.SetActive(false);
+                return;
+            }
+            if (loadProgress.gameObject.activeSelf == false)
+            {
+                loadProgress.gameObject.SetActive(true);
+            }
+            loadProgress.fillAmount = ratio;
+        }
+    }
+    [Serializable]
+    public class HierarchyItemSprite
+    {
+        public AssetLibraryItemType type;
+        public Sprite sprite;
+    }
+}
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollItemUI.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollItemUI.cs.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 6317ef72ffa482d4288657d201a3c6aa
+guid: 06f21187ec447f64f9a7384b458e54c1
 MonoImporter:
  externalObjects: {}
  serializedVersion: 2
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollRect.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollRect.cs
@@ -0,0 +1,220 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+using XED.UI;
+
+namespace XED.AssetLibraryTree
+{
+    public class AssetLibraryScrollRect : ScrollRect, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
+    {
+        public bool passDragToChildren = true;
+        public UnityEvent<AssetLibraryItem, AssetLibraryItem> setToChildItem;
+        public UnityEvent<AssetLibraryItem, AssetLibraryItem> setToPriorSiblingItem;
+        public UnityEvent<AssetLibraryItem, AssetLibraryItem> setToNextSiblingItem;
+        //public UnityEvent onSelect;
+        public UnityEvent<AssetLibraryItem> onDragBegin;
+        public UnityEvent<AssetLibraryItem> onDragAndDrop;
+        public GameObject itemPopup;
+        public GameObject menuPopup;
+        public AssetLibraryItem sourceItem;
+        private AssetLibraryScrollItemUI hoverItemUI;
+        private Coroutine coroutinePendPopup;
+        public UnityEvent<AssetLibraryItem> onExit;
+        public override void OnBeginDrag(PointerEventData eventData)
+        {
+            if (eventData.button != PointerEventData.InputButton.Left)
+                return;
+
+            AssetLibraryScrollItemUI itemUI = GetTargetItemUI(eventData);
+            if (itemUI != null && !itemUI.isSelected)
+            {
+                itemUI.OnPointerClick(eventData);
+            }             
+            onDragBegin?.Invoke(sourceItem);
+            if (!passDragToChildren)
+            {
+                base.OnBeginDrag(eventData);  // Allow default scrolling if needed
+            }
+        }
+
+        public override void OnDrag(PointerEventData eventData)
+        {
+            if (eventData.button == PointerEventData.InputButton.Left)
+            {
+                if (hoverItemUI != null) hoverItemUI.DeactivateAllHighlights();
+                AssetLibraryScrollItemUI itemUI = GetTargetItemUI(eventData);
+                if (itemUI != null)
+                {
+                    RectTransform itemRect = itemUI.GetComponent<RectTransform>();
+                    Vector2 localPoint;
+
+                    RectTransformUtility.ScreenPointToLocalPointInRectangle(
+                        itemRect,
+                        eventData.position,
+                        eventData.pressEventCamera,
+                        out localPoint
+                    );
+
+                    float rectHeight = itemRect.rect.height;
+                    float normalizedY = (localPoint.y + rectHeight / 2) / rectHeight;
+
+                    if (normalizedY >= 0.8f)  // Upper 20%
+                    {
+                        itemUI.ActivateUpperHighlight();
+                    }
+                    else if (normalizedY <= 0.2f)  // Lower 20%
+                    {
+                        itemUI.ActivateLowerHighlight();
+                    }
+                    else  // Middle 60%
+                    {
+                        itemUI.ActivateMidHighlight();
+                    }
+                    hoverItemUI = itemUI;
+                }
+            }
+            if (!passDragToChildren)
+            {
+                base.OnDrag(eventData);
+            }
+        }
+
+       
+
+        public override void OnEndDrag(PointerEventData eventData)
+        {
+            if (eventData.button == PointerEventData.InputButton.Left)
+            {
+                if (hoverItemUI != null) hoverItemUI.DeactivateAllHighlights();
+                if (coroutinePendPopup != null)
+                {
+                    StopCoroutine(coroutinePendPopup);
+                    coroutinePendPopup = null;
+                }
+                itemPopup.SetActive(false);
+                //Add to Other Item Hierarchy
+                AssetLibraryScrollItemUI itemUI = GetTargetItemUI(eventData);
+                if (itemUI != null && sourceItem != null)
+                {
+                    RectTransform itemRect = itemUI.GetComponent<RectTransform>();  // Get RectTransform of the item
+                    Vector2 localPoint;
+
+                    // Convert screen position to local position within the item
+                    RectTransformUtility.ScreenPointToLocalPointInRectangle(
+                        itemRect,
+                        eventData.position,
+                        eventData.pressEventCamera,
+                        out localPoint
+                    );
+
+                    float rectHeight = itemRect.rect.height;  // Height of the item's RectTransform
+                    float normalizedY = (localPoint.y + rectHeight / 2) / rectHeight;  // Normalize to 0 (bottom) to 1 (top)
+
+                    hoverItemUI = itemUI;
+                    AssetLibraryItem destItem = itemUI.currentItem;
+
+                    if (destItem == null)
+                        return;
+
+                    if (normalizedY >= 0.8f)
+                    {
+                        setToPriorSiblingItem?.Invoke(sourceItem, destItem);
+                    }
+                    else if (normalizedY <= 0.2f)
+                    {
+                        setToNextSiblingItem?.Invoke(sourceItem, destItem);
+                    }
+                    else
+                    {
+                        setToChildItem?.Invoke(sourceItem, destItem);
+                    }
+                    sourceItem = null; 
+                } 
+                onDragAndDrop?.Invoke(sourceItem);
+                sourceItem = null;
+            }
+            if (!passDragToChildren)
+            {
+                base.OnEndDrag(eventData);
+            }
+        }
+        public void OnPointerDown(PointerEventData eventData)
+        {
+            if (eventData.button == PointerEventData.InputButton.Left)
+            {
+                AssetLibraryScrollItemUI itemUI = GetTargetItemUI(eventData);
+                if (itemUI != null)
+                {
+                    sourceItem = itemUI.currentItem;
+                }
+                if (sourceItem != null)
+                {
+                    coroutinePendPopup = StartCoroutine(CoroutinePendPopup());
+                }
+            }
+        }
+        public void OnPointerUp(PointerEventData eventData)
+        {
+            if (eventData.button == PointerEventData.InputButton.Left)
+            {
+                if (coroutinePendPopup != null)
+                {
+                    StopCoroutine(coroutinePendPopup);
+                    coroutinePendPopup = null;
+                }
+                itemPopup.SetActive(false); 
+            }
+            else if (eventData.button == PointerEventData.InputButton.Right)
+            {
+                if (menuPopup != null)
+                {
+                    menuPopup.SetActive(true);
+                }
+            }
+        }
+        private AssetLibraryScrollItemUI GetTargetItemUI(PointerEventData eventData)
+        {
+            PointerEventData pointerData = new PointerEventData(EventSystem.current)
+            {
+                position = eventData.position  // Get mouse position at drag end
+            };
+
+            var results = new List<RaycastResult>();
+            EventSystem.current.RaycastAll(pointerData, results);  // Raycast against UI elements
+
+            AssetLibraryScrollItemUI itemUI = null;
+            foreach (var result in results)
+            {
+                itemUI = result.gameObject.GetComponent<AssetLibraryScrollItemUI>();
+                if (itemUI != null)  // Exclude the dragged item itself
+                {
+                    break;
+                }
+            }
+            if (itemUI != null && itemUI.GetComponentInParent<AssetLibraryScrollRect>() == this)
+                return itemUI;
+
+            return null;
+        }
+        public bool IsPointerOverScrollRect()
+        { 
+            return RectTransformUtility.RectangleContainsScreenPoint(
+                GetComponent<RectTransform>(), Input.mousePosition);
+        }
+        IEnumerator CoroutinePendPopup()
+        {
+            yield return new WaitForSeconds(0.1f);
+            itemPopup.SetActive(true);
+            yield return null;
+        }
+
+        public void OnPointerExit(PointerEventData eventData)
+        {
+            onExit?.Invoke(null);
+        }
+    }
+}
--- a/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollRect.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/AssetLibraryScrollRect.cs.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 3966a0ccff02f5b44b226385d4acbce6
+guid: fc24e335961d7d8409f2bc9cc2d7ef00
 MonoImporter:
  externalObjects: {}
  serializedVersion: 2
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyItem.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyItem.cs
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyItem.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyItem.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 5949f80e59af3e74b8189763889c3709
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyPooledScrollView.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyPooledScrollView.cs
@@ -10,19 +10,19 @@ using XED.Command;

 namespace XED.HierarchyTree
 {
-    public class PooledScrollView : MonoBehaviour
+    public class HierarchyPooledScrollView : MonoBehaviour
    {
        private RectTransform content;       // Content RectTransform of the ScrollView.
-        private CustomScrollRect scrollRect;       // ScrollRect component.
+        private HierarchyScrollRect scrollRect;       // ScrollRect component.
        [SerializeField]
        private TMP_InputField searchInput;
        //private Button searchCancelButton;
        private GameObject itemPrefab;       // Prefab for scroll items. 
-        private ObjectPool<ScrollItemUI> pool;  // Pool for UI items.
+        private ObjectPool<HierarchyScrollItemUI> pool;  // Pool for UI items.
        private List<HierarchyItem> data = new List<HierarchyItem>();   // The list of hierarchy items.
        private HierarchyItem root;

-        private List<ScrollItemUI> activeItems = new List<ScrollItemUI>();
+        private List<HierarchyScrollItemUI> activeItems = new List<HierarchyScrollItemUI>();
        public List<HierarchyItem> selectedItems = new List<HierarchyItem>();
        private HierarchyItem lastSelectedItem = null;

@@ -39,7 +39,7 @@ namespace XED.HierarchyTree
        private void Awake()
        {
            content = Find<RectTransform>("Content");
-            scrollRect = GetComponent<CustomScrollRect>();
+            scrollRect = GetComponent<HierarchyScrollRect>();
            if (searchInput == null) 
            {
                searchInput = GetComponentInChildren<TMP_InputField>();
@@ -48,8 +48,8 @@ namespace XED.HierarchyTree
            itemPrefab = Resources.Load<GameObject>("Prefabs/UI/PRF_HierarchyItem");

            //스크롤 뷰에 사용될 오브젝트 풀을 미리 20개 생성
-            pool = new ObjectPool<ScrollItemUI>(
-                createFunc: () => Instantiate(itemPrefab).GetComponent<ScrollItemUI>(),
+            pool = new ObjectPool<HierarchyScrollItemUI>(
+                createFunc: () => Instantiate(itemPrefab).GetComponent<HierarchyScrollItemUI>(),
                actionOnGet: (item) => item.gameObject.SetActive(true),
                actionOnRelease: (item) => item.gameObject.SetActive(false),
                actionOnDestroy: (item) => Destroy(item.gameObject),
@@ -85,7 +85,7 @@ namespace XED.HierarchyTree
            tempItem.onParentChanged = onParentChanged;
            if (parent == null)
            {
-                root.AddChild(tempItem);
+                root.AddChild(tempItem); 
            }
            else
            {
@@ -218,7 +218,7 @@ namespace XED.HierarchyTree
            for (int i = startIndex; i < endIndex; i++)
            {
                HierarchyItem item = data[i];
-                ScrollItemUI itemUI = GetItemUI();
+                HierarchyScrollItemUI itemUI = GetItemUI();
                int w = itemUI.SetItemData(item);
                itemUI.SetSelected(selectedItems);
                if (w > maxWidth) maxWidth = w;
@@ -232,9 +232,9 @@ namespace XED.HierarchyTree

            content.sizeDelta = new Vector2(maxWidth, data.Count * itemHeight);  // Set content height. 
        }
-        private ScrollItemUI GetItemUI()
+        private HierarchyScrollItemUI GetItemUI()
        {
-            ScrollItemUI itemUI = pool.Get();
+            HierarchyScrollItemUI itemUI = pool.Get();
            itemUI.onClickSingle.RemoveAllListeners();
            itemUI.onClickSingle.AddListener(OnSelectSingle);
            itemUI.onClickAddSingle.RemoveAllListeners();
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyPooledScrollView.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyPooledScrollView.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 448ec7391867608489f206f58b3630af
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyPopupScrollViewItem.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyPopupScrollViewItem.cs
@@ -7,9 +7,9 @@ using TMPro;

 namespace XED.HierarchyTree
 {
-    public class PopupScrollViewItem : UnityEngine.MonoBehaviour
+    public class HierarchyPopupScrollViewItem : UnityEngine.MonoBehaviour
    {
-        private CustomScrollRect scrollRect;
+        private HierarchyScrollRect scrollRect;
        private TMP_Text text;
        private Canvas canvas;
        // Start is called before the first frame update
@@ -17,7 +17,7 @@ namespace XED.HierarchyTree
        {
            canvas = GetComponentInParent<Canvas>();
            text = GetComponentInChildren<TMP_Text>();
-            scrollRect = GetComponentInParent<CustomScrollRect>();
+            scrollRect = GetComponentInParent<HierarchyScrollRect>();
            scrollRect.itemPopup = gameObject;
            gameObject.SetActive(false);
        }
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyPopupScrollViewItem.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyPopupScrollViewItem.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: cc5c360456b9e024b9f8086a48c83331
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollItemUI.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollItemUI.cs
@@ -10,7 +10,7 @@ using XRLib;

 namespace XED.HierarchyTree
 {
-    public class ScrollItemUI : UnityEngine.MonoBehaviour, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler//, IBeginDragHandler, IEndDragHandler,
+    public class HierarchyScrollItemUI : UnityEngine.MonoBehaviour, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler//, IBeginDragHandler, IEndDragHandler,
    {
        public TMP_Text nameText;
        public Image iconImage;
@@ -143,11 +143,11 @@ namespace XED.HierarchyTree
        }
        public void OnEndDrag(BaseEventData data)
        {
-            ScrollItemUI itemUI = GetDropTarget(data);
+            HierarchyScrollItemUI itemUI = GetDropTarget(data);
            if (itemUI != null)
                itemUI.OnEndDrag();
        }
-        private ScrollItemUI GetDropTarget(BaseEventData data)
+        private HierarchyScrollItemUI GetDropTarget(BaseEventData data)
        {
            PointerEventData eventData = (PointerEventData)data;
            PointerEventData pointerData = new PointerEventData(EventSystem.current)
@@ -160,7 +160,7 @@ namespace XED.HierarchyTree

            foreach (var result in results)
            {
-                ScrollItemUI itemUI = result.gameObject.GetComponent<ScrollItemUI>();
+                HierarchyScrollItemUI itemUI = result.gameObject.GetComponent<HierarchyScrollItemUI>();
                if (itemUI != null)  
                {
                    return itemUI;  
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollItemUI.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollItemUI.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: f0bda0c2ecf40cb46b79090671565e7a
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollRect.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollRect.cs
@@ -9,7 +9,7 @@ using XED.UI;

 namespace XED.HierarchyTree
 {
-    public class CustomScrollRect : ScrollRect, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
+    public class HierarchyScrollRect : ScrollRect, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
    {
        public bool passDragToChildren = true;
        public UnityEvent<HierarchyItem, HierarchyItem> setToChildItem;
@@ -21,7 +21,7 @@ namespace XED.HierarchyTree
        public GameObject itemPopup;
        public GameObject menuPopup;
        public HierarchyItem sourceItem;
-        private ScrollItemUI hoverItemUI;
+        private HierarchyScrollItemUI hoverItemUI;
        private Coroutine coroutinePendPopup;
        public UnityEvent<HierarchyItem> onExit;
        public override void OnBeginDrag(PointerEventData eventData)
@@ -29,7 +29,7 @@ namespace XED.HierarchyTree
            if (eventData.button != PointerEventData.InputButton.Left)
                return;

-            ScrollItemUI itemUI = GetTargetItemUI(eventData);
+            HierarchyScrollItemUI itemUI = GetTargetItemUI(eventData);
            if (itemUI != null && !itemUI.isSelected)
            {
                itemUI.OnPointerClick(eventData);
@@ -46,7 +46,7 @@ namespace XED.HierarchyTree
            if (eventData.button == PointerEventData.InputButton.Left)
            {
                if (hoverItemUI != null) hoverItemUI.DeactivateAllHighlights();
-                ScrollItemUI itemUI = GetTargetItemUI(eventData);
+                HierarchyScrollItemUI itemUI = GetTargetItemUI(eventData);
                if (itemUI != null)
                {
                    RectTransform itemRect = itemUI.GetComponent<RectTransform>();
@@ -97,7 +97,7 @@ namespace XED.HierarchyTree
                }
                itemPopup.SetActive(false); 
                //Add to Other Item Hierarchy
-                ScrollItemUI itemUI = GetTargetItemUI(eventData);
+                HierarchyScrollItemUI itemUI = GetTargetItemUI(eventData);
                if (itemUI != null && sourceItem != null)
                {
                    RectTransform itemRect = itemUI.GetComponent<RectTransform>();  // Get RectTransform of the item
@@ -146,7 +146,7 @@ namespace XED.HierarchyTree
        {
            if (eventData.button == PointerEventData.InputButton.Left)
            {
-                ScrollItemUI itemUI = GetTargetItemUI(eventData);
+                HierarchyScrollItemUI itemUI = GetTargetItemUI(eventData);
                if (itemUI != null)
                {
                    sourceItem = itemUI.currentItem;
@@ -176,7 +176,7 @@ namespace XED.HierarchyTree
                }
            }
        }
-        private ScrollItemUI GetTargetItemUI(PointerEventData eventData)
+        private HierarchyScrollItemUI GetTargetItemUI(PointerEventData eventData)
        {
            PointerEventData pointerData = new PointerEventData(EventSystem.current)
            {
@@ -186,16 +186,16 @@ namespace XED.HierarchyTree
            var results = new List<RaycastResult>();
            EventSystem.current.RaycastAll(pointerData, results);  // Raycast against UI elements

-            ScrollItemUI itemUI = null;
+            HierarchyScrollItemUI itemUI = null;
            foreach (var result in results)
            {
-                itemUI = result.gameObject.GetComponent<ScrollItemUI>();
+                itemUI = result.gameObject.GetComponent<HierarchyScrollItemUI>();
                if (itemUI != null)  // Exclude the dragged item itself
                {
                    break;
                }
            }
-            if (itemUI != null && itemUI.GetComponentInParent<CustomScrollRect>() == this)
+            if (itemUI != null && itemUI.GetComponentInParent<HierarchyScrollRect>() == this)
                return itemUI;

            return null;
--- a/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollRect.cs.meta
+++ b/Assets/Scripts/Studio/UI/TreeView/HierarchyScrollRect.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: cab9a4db9e60ee84f94fb7ae134fbcc5
--- a/Assets/Scripts/Studio/UI/TreeView/PopupScrollViewMenu.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/PopupScrollViewMenu.cs
@@ -6,13 +6,13 @@ namespace XED.UI
 {
    public class PopupScrollViewMenu : MonoBehaviour
    {
-        private CustomScrollRect scrollRect;
+        private HierarchyScrollRect scrollRect;
        private Canvas canvas;
        // Start is called before the first frame update
        void Awake()
        {
            canvas = GetComponentInParent<Canvas>();
-            scrollRect = GetComponentInParent<CustomScrollRect>();
+            scrollRect = GetComponentInParent<HierarchyScrollRect>();
            scrollRect.menuPopup = gameObject;
            gameObject.SetActive(false);
        }
--- a/Assets/Scripts/Studio/UI/TreeView/ScrollViewMenu_ImportExport.cs
+++ b/Assets/Scripts/Studio/UI/TreeView/ScrollViewMenu_ImportExport.cs
@@ -12,7 +12,7 @@ namespace XED.UI
    public class ScrollViewMenu_ImportExport : PanelBase, IDeselectHandler
    {
        private Canvas canvas;
-        private XED.HierarchyTree.CustomScrollRect scrollRect;
+        private XED.AssetLibraryTree.AssetLibraryScrollRect scrollRect;
        private Button btnExport;
        private Button btnImport;
        private Selectable selectable;