I wrote some framework code for you in reply to your latest post at Re: GETTING the input from a cascading menu.

I advise against this GUI design: "When it cascades, it will open an option to enter a directory where the backup repository is".

I don't think that I currently use any GUI with that paradigm. I am not saying that this can't be done. Heck, probably anything can be done!

My advice is to to have "Change Repo Name" be a left click "executable target, explicitly invoked by the user" in the cascading menu. A "hover and pop up complex dialog" behavior does not fit with usual, common GUI practice.

Get your GUI working with usual GUI norms and then ask how to do weird stuff. However, I doubt that your users will expect the kind of behavior that you describe nor will they be disappointed by the lack of it.