Fix showing tooltips for tree nodes in Editor

Source/Editor/GUI/Tree/TreeNode.cs

@@ -148,7 +148,6 @@ namespace FlaxEditor.GUI.Tree
                     else if (Parent is Tree tree)
                         _tree = tree;
                 }
-
                 return _tree;
             }
         }
@@ -613,12 +612,6 @@ namespace FlaxEditor.GUI.Tree
             {
                 base.Update(deltaTime);
             }
-            else
-            {
-                // Manually update tooltip
-                if (TooltipText != null && IsMouseOver)
-                    Tooltip.OnMouseOverControl(this, deltaTime);
-            }
         }
 
         /// <inheritdoc />
@@ -1006,6 +999,21 @@ namespace FlaxEditor.GUI.Tree
             base.OnDragLeave();
         }
 
+        /// <inheritdoc />
+        public override bool OnTestTooltipOverControl(ref Vector2 location)
+        {
+            return TestHeaderHit(ref location) && ShowTooltip;
+        }
+
+        /// <inheritdoc />
+        public override bool OnShowTooltip(out string text, out Vector2 location, out Rectangle area)
+        {
+            text = TooltipText;
+            location = _headerRect.Size * new Vector2(0.5f, 1.0f);
+            area = new Rectangle(Vector2.Zero, _headerRect.Size);
+            return ShowTooltip;
+        }
+
         /// <inheritdoc />
         protected override void OnSizeChanged()
         {

Source/Engine/UI/GUI/Control.cs

@@ -593,7 +593,7 @@ namespace FlaxEngine.GUI
             _isMouseOver = true;
 
             // Update tooltip
-            if (ShowTooltip)
+            if (ShowTooltip && OnTestTooltipOverControl(ref location))
             {
                 Tooltip.OnMouseEnterControl(this);
                 SetUpdate(ref _tooltipUpdate, OnUpdateTooltip);
@@ -608,12 +608,20 @@ namespace FlaxEngine.GUI
         public virtual void OnMouseMove(Vector2 location)
         {
             // Update tooltip
-            if (_tooltipUpdate == null && ShowTooltip)
+            if (ShowTooltip && OnTestTooltipOverControl(ref location))
+            {
+                if (_tooltipUpdate == null)
                 {
                     Tooltip.OnMouseEnterControl(this);
                     SetUpdate(ref _tooltipUpdate, OnUpdateTooltip);
                 }
             }
+            else if (_tooltipUpdate != null)
+            {
+                SetUpdate(ref _tooltipUpdate, null);
+                Tooltip.OnMouseLeaveControl(this);
+            }
+        }
 
         /// <summary>
         /// When mouse leaves control's area