Merge branch 'scenetree-scroll' of https://github.com/Zode/FlaxEngine into Zode-scenetree-scroll

Source/Editor/GUI/Tree/Tree.cs

@@ -73,6 +73,11 @@ namespace FlaxEditor.GUI.Tree
         /// </summary>
         public bool DrawRootTreeLine = true;
 
+        /// <summary>
+        /// Occurs when the defered layouting happens
+        /// </summary>
+        public event Action OnDeferedLayout;
+
         /// <summary>
         /// Gets or sets the margin for the child tree nodes.
         /// </summary>
@@ -375,6 +380,7 @@ namespace FlaxEditor.GUI.Tree
             if (_deferLayoutUpdate)
             {
                 base.PerformLayout();
+                OnDeferedLayout?.Invoke();
                 _deferLayoutUpdate = false;
             }
 

Source/Editor/Windows/SceneTreeWindow.cs

@@ -34,6 +34,7 @@ namespace FlaxEditor.Windows
         private DragScriptItems _dragScriptItems;
         private DragHandlers _dragHandlers;
         private bool _isDropping = false;
+        private bool _forceScrollNodeToView = false;
 
         /// <summary>
         /// Scene tree panel.
@@ -91,6 +92,14 @@ namespace FlaxEditor.Windows
             _tree.SelectedChanged += Tree_OnSelectedChanged;
             _tree.RightClick += OnTreeRightClick;
             _tree.Parent = _sceneTreePanel;
+            _tree.OnDeferedLayout += () => {
+                if(_forceScrollNodeToView)
+                {
+                    _forceScrollNodeToView = false;
+                    ScrollToSelectedNode();
+                }
+            };
+            
             headerPanel.Parent = this;
 
             // Setup input actions
@@ -142,6 +151,15 @@ namespace FlaxEditor.Windows
             root.TreeNode.UpdateFilter(query);
 
             _tree.UnlockChildrenRecursive();
+            
+            var nodeSelection = _tree.Selection;
+            if(nodeSelection.Count != 0)
+            {
+                var node = nodeSelection[nodeSelection.Count - 1];
+                node.Expand(true);
+                _forceScrollNodeToView = true;
+            }
+
             PerformLayout();
             PerformLayout();
         }