diff --git a/code/nel/include/nel/gui/interface_element.h b/code/nel/include/nel/gui/interface_element.h
index 739f1b95e..83bda2c84 100644
--- a/code/nel/include/nel/gui/interface_element.h
+++ b/code/nel/include/nel/gui/interface_element.h
@@ -70,6 +70,14 @@ namespace NLGUI
 	{
 	public:
 
+		/// Watches CInterfaceElement deletions
+		class IDeletionWatcher
+		{
+		public:
+			IDeletionWatcher(){}
+			virtual ~IDeletionWatcher(){}
+			virtual void onDeleted( const std::string &name ){}
+		};
 
 		enum EStrech
 		{
@@ -489,6 +497,12 @@ namespace NLGUI
 		/// Called when the widget is removed from it's parent group
 		virtual void onRemoved(){}
 
+		/// Registers a deletion watcher
+		static void registerDeletionWatcher( IDeletionWatcher *watcher );
+
+		/// Unregisters a deletion watcher
+		static void unregisterDeletionWatcher( IDeletionWatcher *watcher );
+
 	protected:
 
 		bool editorSelected;
@@ -549,6 +563,11 @@ namespace NLGUI
 		void parseSizeRef(const char *sizeRefStr, sint32 &sizeref, sint32 &sizeDivW, sint32 &sizeDivH);
 
 	private:
+		/// Notifies the deletion watchers that this interface element is being deleted
+		void notifyDeletionWatchers();
+		
+		static std::vector< IDeletionWatcher* > deletionWatchers;
+
 		//void	snapSize();
 		bool serializable;
 
diff --git a/code/nel/src/gui/interface_element.cpp b/code/nel/src/gui/interface_element.cpp
index dc51735ff..9385887a4 100644
--- a/code/nel/src/gui/interface_element.cpp
+++ b/code/nel/src/gui/interface_element.cpp
@@ -32,6 +32,7 @@ using namespace NLMISC;
 namespace NLGUI
 {
 	bool CInterfaceElement::editorMode = false;
+	std::vector< CInterfaceElement::IDeletionWatcher* > CInterfaceElement::deletionWatchers;
 
 	// ------------------------------------------------------------------------------------------------
 	CInterfaceElement::~CInterfaceElement()
@@ -44,6 +45,7 @@ namespace NLGUI
 			}
 			delete _Links;
 		}
+		notifyDeletionWatchers();
 	}
 
 	// ------------------------------------------------------------------------------------------------
@@ -1551,6 +1553,36 @@ namespace NLGUI
 		}
 	}
 
+	void CInterfaceElement::registerDeletionWatcher( IDeletionWatcher *watcher )
+	{
+		std::vector< IDeletionWatcher* >::iterator itr 
+			= std::find( deletionWatchers.begin(), deletionWatchers.end(), watcher );
+		// Already registered
+		if( itr != deletionWatchers.end() )
+			return;
+		deletionWatchers.push_back( watcher );
+	}
+
+	void CInterfaceElement::unregisterDeletionWatcher( IDeletionWatcher *watcher )
+	{
+		std::vector< IDeletionWatcher* >::iterator itr 
+			= std::find( deletionWatchers.begin(), deletionWatchers.end(), watcher );
+		// Not registered
+		if( itr == deletionWatchers.end() )
+			return;
+		deletionWatchers.erase( itr );
+	}
+
+	void CInterfaceElement::notifyDeletionWatchers()
+	{
+		std::vector< IDeletionWatcher* >::iterator itr = deletionWatchers.begin();
+		while( itr != deletionWatchers.end() )
+		{
+			(*itr)->onDeleted( _Id );
+			++itr;
+		}
+	}
+
 	CStringMapper* CStringShared::_UIStringMapper = NULL;
 
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.cpp
index 96ae10aa3..2bab73c1e 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.cpp
@@ -56,6 +56,26 @@ namespace
 		name = s.toUtf8().constData();
 		return name;
 	}
+
+	class CWidgetDeletionWatcher : public CInterfaceElement::IDeletionWatcher
+	{
+	public:
+		CWidgetDeletionWatcher(){ h = NULL; }
+		
+		~CWidgetDeletionWatcher(){}
+		
+		void onDeleted( const std::string &id ){
+			if( h != NULL )
+				h->onWidgetDeleted( id );
+		}
+
+		void setWidgetHierarchy( GUIEditor::WidgetHierarchy *h ){ this->h = h; }
+
+	private:
+		GUIEditor::WidgetHierarchy *h;
+	};
+
+	CWidgetDeletionWatcher deletionWatcher;
 }
 
 namespace GUIEditor
@@ -66,6 +86,7 @@ namespace GUIEditor
 		setupUi( this );
 		connect( widgetHT, SIGNAL( itemDoubleClicked( QTreeWidgetItem*, int ) ),
 			this, SLOT( onItemDblClicked( QTreeWidgetItem* ) ) );
+		deletionWatcher.setWidgetHierarchy( this );
 	}
 
 	WidgetHierarchy::~WidgetHierarchy()
@@ -74,6 +95,7 @@ namespace GUIEditor
 
 	void WidgetHierarchy::clearHierarchy()
 	{
+		CInterfaceElement::unregisterDeletionWatcher( &deletionWatcher );
 		widgetHT->clear();
 		widgetHierarchyMap.clear();
 	}
@@ -81,6 +103,7 @@ namespace GUIEditor
 	void WidgetHierarchy::buildHierarchy( std::string &masterGroup )
 	{
 		clearHierarchy();
+		CInterfaceElement::registerDeletionWatcher( &deletionWatcher );
 
 		CInterfaceGroup *mg = CWidgetManager::getInstance()->getMasterGroupFromId( masterGroup );
 		if( mg != NULL )
@@ -131,6 +154,39 @@ namespace GUIEditor
 		}
 	}
 
+	void WidgetHierarchy::onWidgetDeleted( const std::string &id )
+	{
+		std::map< std::string, QTreeWidgetItem* >::iterator itr
+			= widgetHierarchyMap.find( id );
+		if( itr == widgetHierarchyMap.end() )
+			return;
+
+		if( widgetHT->currentItem() == itr->second )
+		{
+			QTreeWidgetItem *item = itr->second;
+			QTreeWidgetItem *p = item;
+			
+			// Deselect item
+			item->setSelected( false );
+			widgetHT->setCurrentItem( NULL );
+			
+			// Collapse the tree
+			while( p != NULL )
+			{
+				p->setExpanded( false );
+				p = p->parent();
+			}
+			
+			currentSelection = "";
+		}
+
+		itr->second->setSelected( false );
+
+		delete itr->second;
+		itr->second = NULL;
+		widgetHierarchyMap.erase( itr );
+	}
+
 	void WidgetHierarchy::onGUILoaded()
 	{
 		if( masterGroup.empty() )
@@ -145,35 +201,7 @@ namespace GUIEditor
 			return;
 
 		if( newSelection.empty() )
-		{
-			if( widgetHT->currentItem() != NULL )
-			{
-				QTreeWidgetItem *item = widgetHT->currentItem();
-				QTreeWidgetItem *p = item;
-
-				// Deselect item
-				item->setSelected( false );
-				widgetHT->setCurrentItem( NULL );
-
-				// Collapse the tree
-				while( p != NULL )
-				{
-					p->setExpanded( false );
-					p = p->parent();
-				}
-
-				// Finally remove the item!
-				delete item;
-				item = NULL;
-
-				std::map< std::string, QTreeWidgetItem* >::iterator itr =
-					widgetHierarchyMap.find( currentSelection );
-				if( itr != widgetHierarchyMap.end() )
-					widgetHierarchyMap.erase( itr );
-				currentSelection = "";
-			}
 			return;
-		}
 
 		std::map< std::string, QTreeWidgetItem* >::iterator itr = 
 			widgetHierarchyMap.find( newSelection );
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.h
index 58e66212e..6de6b1366 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/gui_editor/widget_hierarchy.h
@@ -42,6 +42,8 @@ namespace GUIEditor
 		void clearHierarchy();
 		void buildHierarchy( std::string &masterGroup );
 
+		void onWidgetDeleted( const std::string &id );
+
 	private:
 		void buildHierarchy( QTreeWidgetItem *parent, NLGUI::CInterfaceGroup *group );