As I currently see your task, you do not need any of Tk::TableMatrix.

You only need two Text widgets, placed together, with maybe a separator between them so the user could adjust widths.
from time to time, I tend to write such kind of tasks, but I have different approach to usage of Tk from within Perl.
if you wish, I can extract proper GUI building parts from my recent GUI program to show how your could do the task.

as for another part of your question - efficiency of Text widgets - it is rather efficient. No worries about editing several thousand of lines in each.

Regards,
Vadim

In reply to Re: Extensibility of Tk::TableMatrix by vkon
in thread Extensibility of Tk::TableMatrix by elef

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