As you explained a problem with GUI design, you must see a link http://www.vkonovalov.ru/vtcl-usage/Using_vtcl_for_creating_Tcl-Tk_GUI_for_Perl.html

Actually perl/Tk is quite hard to maintain and it is very unobvious on what GUI will be.
Tcl::Tk provides many TIMTOWTDI alternatives, yet very effective, yet much larger widget set, etc.

When I switched from perl/Tk to Tcl::Tk I never looked back and feel only improvements.

In reply to Re: Writing and maintaining Tk GUIs with ZooZ by vkon
in thread Writing and maintaining Tk GUIs with ZooZ by g0n

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