Nope. It's mostly only intended for Perl programmers, so there was no need to comment the code as it's all pretty basic stuff that is explained in the documentation of the modules used. The errors mean you need to install Tk/Perl.
It's a pretty basic Tk demonstration, it's probably not worth the time to write docs for it. The one interesting part is the Ev() calls, which are a neat Tk thing to control what arguments get passed to your callback.
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