docu

GUI/Model/Material/MaterialItem.h

@@ -35,6 +35,11 @@ public:
     MaterialItem();
 
     //! Creates a complete copy, also the identifier is the same.
+    //!
+    //! Note that the base QObject is freshly initialized, not copied from \a other. Therefore
+    //! object hierarchy, connections, properties, object name or similar things are not copied.
+    //! This is of no harm since this class is only derived from QObject to provide data change
+    //! signaling.
     MaterialItem(const MaterialItem& other);
 
     //! Turns material into refractive index material.