Re: 'refreshing' a widget

[Tristan Van Berkom <vantr touchtunes com>]

There are a few ways to do that. Ususaly
you would use a g_io_add_watch or gdk_input_add
unless your process blocks a long time on IO.

If you absolutly need to do it in another thread
you could put a g_cond_wait(condition) in your
main thread and use g_cond_signal(condition) to
unblock the main thread (i.e. g_cond_wait() will return)
_or_ a popular hack is the following few lines:

while (gtk_events_pending())
        gtk_main_iteration_do(TRUE);

this will clear up the queue of events in the main loop
Cheers
        -Tristan

G Hasse wrote:
> On Tue, 17 Sep 2002, Dave Cunningham wrote:
>
> > Hi,
> >
> > I'm writing a program where widgets are altered by a thread other than
> > the main gtk loop. (The thread reads a joystick device, and sleeps until
> > a button is pressed).
>
> First. You don't need a thread. Use "gdk_input_add" to watch for
> data on the file descriptor.
>
> > I find that the display is never updated until something happens in the
> > main loop, and presumable an expose event is emitted or something.
>
> You can emit signals to widgets yourself. Look for a suitable
> method.
>
> It is quite easy to write your own widget. We have written a lot of
> them and if you give me a hint we might have someting that you
> easy could modify.
>
> http://www.raditex.se/bilder/process1.png
>
> Göran Hasse
>
> ----------------------------------------------------------------
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