Default namespace based on cmake project?

Hi,

So I've got several CMake projects within one 'solution' folder, each with their own namespaces. Adding correct namespace each time i create a new class within any of these projects is a little tedious. Is there a trick to have it done for me?
In Qt Creator, I could type 'mynamespace::MyClass' as class name to get an empty class 'MyClass' within 'mynamespace' namespace.

As a workaround up until now, I've changed my code template creation to always insert an empty namespace when creating a source or header file. I still have to add the correct namespace name, though.