Re: timeout wont run without a 'print'!?

[muppet <scott asofyet org>]

On Jan 2, 2008, at 10:38 PM, Thomas Ledbetter wrote:

> I have a timeout set up to run every second, such that the 6 text  
> entry
> widgets get a random number displayed in them.
>
> The weird thing is: the timeout itself only runs once and then stops
> after the first iteration  *unless* I put a 'print' statement in the
> subroutine!?!  And then it runs fine!?!  But only with the 'print;' in
> there!?!?

The timeout will uninstall itself unless the callback returns a true  
value.  Most likely you were not returning anything, so the value of  
the last expression in the subroutine was used as the return value,  
and print() was returning true where without it it was returning false.

http://live.gnome.org/GTK2-Perl/FrequentlyAskedQuestions#head-98626f4df6988bac3d10b50a3f4e21eca0698da2

http://gtk2-perl.sourceforge.net/doc/pod/Glib/MainLoop.html#integer_Glib_Timeout

http://library.gnome.org/devel/glib/unstable/glib-The-Main-Event-Loop.html#g-timeout-add

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