Isn't TK usually part of the standard library? Of course, then you have to build your UI in code, which can be a lot for a beginner - which I why I stated QML o

Isn't TK usually part of the standard library? Of course, then you have to build your UI in code, which can be a lot for a beginner - which I why I stated QML or GTK Composite Templates, both allow you to design your UI in the relevant tool (QtCreator, Glade) and then just wire it up. Speaking from experience, the trial and error of creating UI's in code instead of through a markup language with an editor that can preview it is a pain.