For some reason the callback function is now executed immediately... $button->after(0, [\&update, \$prog ]);

What do you think that 0 (zero) that you have as the first argument to ->after() means?

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Perl Tk Asynchronous Progress Updates by BrowserUk
in thread Perl Tk Asynchronous Progress Updates by hermes1908

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