Assets/Resources/Prefabs/UI/PRF_AssetHierarchyFileItem.prefab

@@ -168,6 +168,7 @@ RectTransform:
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children:
+  - {fileID: 5522365722120041147}
   - {fileID: 5951700390897484313}
   m_Father: {fileID: 0}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
@@ -247,9 +248,9 @@ MonoBehaviour:
     m_SelectOnRight: {fileID: 0}
   m_Transition: 1
   m_Colors:
-    m_NormalColor: {r: 1, g: 1, b: 1, a: 1}
-    m_HighlightedColor: {r: 0.9607843, g: 0.9607843, b: 0.9607843, a: 1}
-    m_PressedColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 1}
+    m_NormalColor: {r: 0.35, g: 0.35, b: 0.35, a: 0}
+    m_HighlightedColor: {r: 0.65, g: 0.65, b: 0.65, a: 0.29803923}
+    m_PressedColor: {r: 0.6509804, g: 0.6509804, b: 0.6509804, a: 0.29803923}
     m_SelectedColor: {r: 0.9607843, g: 0.9607843, b: 0.9607843, a: 1}
     m_DisabledColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 0.5019608}
     m_ColorMultiplier: 1
@@ -266,7 +267,82 @@ MonoBehaviour:
     m_SelectedTrigger: Selected
     m_DisabledTrigger: Disabled
   m_Interactable: 1
-  m_TargetGraphic: {fileID: 7283401773250522798}
+  m_TargetGraphic: {fileID: 1568911567453506347}
   m_OnClick:
     m_PersistentCalls:
       m_Calls: []
+--- !u!1 &7655375860918751099
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 5522365722120041147}
+  - component: {fileID: 1306554313402992465}
+  - component: {fileID: 1568911567453506347}
+  m_Layer: 5
+  m_Name: Image_Background
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!224 &5522365722120041147
+RectTransform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 7655375860918751099}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 2062179146838381722}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+  m_AnchorMin: {x: 0, y: 0}
+  m_AnchorMax: {x: 1, y: 1}
+  m_AnchoredPosition: {x: 0, y: 0}
+  m_SizeDelta: {x: 0, y: 0}
+  m_Pivot: {x: 0.5, y: 0.5}
+--- !u!222 &1306554313402992465
+CanvasRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 7655375860918751099}
+  m_CullTransparentMesh: 1
+--- !u!114 &1568911567453506347
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 7655375860918751099}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: fe87c0e1cc204ed48ad3b37840f39efc, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_Material: {fileID: 0}
+  m_Color: {r: 0.65, g: 0.65, b: 0.65, a: 1}
+  m_RaycastTarget: 1
+  m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
+  m_Maskable: 1
+  m_OnCullStateChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  m_Sprite: {fileID: 0}
+  m_Type: 0
+  m_PreserveAspect: 0
+  m_FillCenter: 1
+  m_FillMethod: 4
+  m_FillAmount: 1
+  m_FillClockwise: 1
+  m_FillOrigin: 0
+  m_UseSpriteMesh: 0
+  m_PixelsPerUnitMultiplier: 1

Assets/Scripts/Studio/UI/Elements/UI_AssetHierarchyFileItem.cs

@@ -8,6 +8,7 @@ namespace Studio
 {
     public class UI_AssetHierarchyFileItem : UIBase
     {
+        private Image Image_Background;
         private TextMeshProUGUI Text_AssetName;
         public Action<string, UI_AssetHierarchyFileItem> onClickFileItem;
 
@@ -25,5 +26,13 @@ namespace Studio
         {
             onClickFileItem?.Invoke(Text_AssetName.text, this);
         }
+        public void SetBackgroundColor()
+        {
+            Image_Background.color = new Color(0.35f, 0.35f, 0.35f, 0.5f);
+        }
+        public void ResetBackgroundColor()
+        {
+            Image_Background.color = new Color(0.65f, 0.65f, 0.65f, 1f);
+        }
     }
 }

Assets/Scripts/Studio/UI/Elements/UI_AssetHierarchyFolderItem.cs

@@ -14,6 +14,8 @@ namespace Studio
         private RectTransform FoldContent;
 
         private UI_AssetHierarchyFileItem prf_assetHierarchyFileItem;
+        private List<UI_AssetHierarchyFileItem> items = new List<UI_AssetHierarchyFileItem>();
+        private UI_AssetHierarchyFileItem currentItem;
         public Action updateLayout;
         public Action<string, UI_AssetHierarchyFileItem> onClickFileItem;
         public override void AfterAwake()
@@ -26,13 +28,17 @@ namespace Studio
             Text_FolderName.text = folderName;
 
             foreach (Transform child in FoldContent)
+            {
                 Destroy(child.gameObject);
+            }
+            items.Clear();
 
             foreach (var file in files)
             {
                 var item = Instantiate(prf_assetHierarchyFileItem, FoldContent);
                 item.onClickFileItem += OnClickFileItem;
                 item.SetData(file);
+                items.Add(item);
             }
 
             FoldContent.gameObject.SetActive(Toggle_Fold.isOn);
@@ -64,6 +70,13 @@ namespace Studio
         }
         private void OnClickFileItem(string name, UI_AssetHierarchyFileItem item)
         {
+            if (currentItem != null)
+            {
+                currentItem.ResetBackgroundColor();
+            }
+            currentItem = item;
+            currentItem.SetBackgroundColor();
+
             onClickFileItem?.Invoke(name, item);
         }
     }

Assets/Scripts/Studio/UI/Panel/Panel_AssetInfo.cs

@@ -8,6 +8,7 @@ namespace Studio
 {
     public class Panel_AssetInfo : PanelBase
     {
+        private UI_AssetHierarchyFileItem item;
         private Button Button_Close;
 
         private TextMeshProUGUI AssetName;
@@ -33,6 +34,7 @@ namespace Studio
             if (targetUI == null || rectTransform == null)
                 return;
 
+            item = targetUI.GetComponent<UI_AssetHierarchyFileItem>();
             SetActive(true);
 
             Vector3[] targetCorners = new Vector3[4];
@@ -50,6 +52,7 @@ namespace Studio
         }
         public void Close()
         {
+            item.ResetBackgroundColor();
             SetActive(false);
         }
         public void Active(bool isOn)