Re: updating (refreshing) a window or widget

["muppet" <scott asofyet org>]

Blitzkrieg said:
> I need to refresh (update) a window (in
> fact a widget) every X seconds.

 $id = Glib::Timeout->add ($milliseconds, \&timeout_handler);

 sub timeout_handler {
    do_cool_stuff ();
    return $need_to_stay_installed;
 }

http://gtk2-perl.sourceforge.net/doc/pod/Glib/MainLoop.html#integer_Glib_Timeout
http://developer.gnome.org/doc/API/2.0/glib/glib-The-Main-Event-Loop.html#g-timeout-add


This will require a rework of your Tk code, as you need to ensure that the
main loop has control in order for the timeout to fire, but personally i find
the Tk model rather confusing.


> So, using Gtk2::Window and Gtk2::SimpleList how should i do refresh the
> list, every X seconds, and in the meanwhile receive data from a daemon
> (i don't want the exact code, but the idea and some examples or docs
> about the api used)? Could you point me to some documentation sources
> other than gtk2-perl.sourceforge.net/doc/ ?

Similarly, you can use Glib::IO->add_watch() to tell glib's main loop to poll
a file descriptor, and invoke a callback when data arrives.  That, coupled
with a timeout, is the traditional way to achieve what you want.

http://live.gnome.org/GTK2_2dPerl_2fFrequentlyAskedQuestions#head-3b88c68683fd189b09455a462d5e41669b7b1142
http://gtk2-perl.sourceforge.net/doc/pod/Glib/MainLoop.html#integer_Glib_IO_add_
http://developer.gnome.org/doc/API/2.0/glib/glib-IO-Channels.html#g-io-add-watch



-- 
muppet <scott at asofyet dot org>