Re: Xlib: unexpected async reply (sequence #####)!

[Gregory Hosler <ghosler redhat com>]

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Gabriel Schulhof wrote:
> On Sun, 2007-08-05 at 11:29 +0800, Gregory Hosler wrote:
> > I'm looking for code examples specifically on how to use/implement g_idle_add().
> > Know any projects that uses g_idle_add() and related infrastructure?
>
>
> static gboolean
> make_insensitive_idle_cb(gpointer data)
> {
>   GtkWidget *widget = GTK_WIDGET(data);
>
>   gtk_widget_set_sensitive(widget, FALSE);
>
> /* Return FALSE so as not to keep executing this function over and over
>    again */
>   return FALSE;
> }
>
> static gpointer
> my_thread(gpointer data)
> {
> /* ... do something of long duration, during which ... */
>
> g_idle_add(make_insensitive_idle_cb, some_widget);
>
> /* ... do the rest of the long duration stuff ... */
>
> return NULL;
> }
>
> Have a look at
>
> http://developer.gnome.org/doc/API/2.0/glib/glib-The-Main-Event-Loop.html#id2603517

I actually had a look at that page prior to my post. It didn't answer some of
the basic questions / concerns I had.

Your example clears up alot of stuff for me. One of my questions (that your
example pretty much clarifies for me), was "what do I g_idle_add()" ?
If I understand correctly, you basically add callback functions, and in
particular, ones that are gtk/gdk related (i.e. that deal with the displaying of
widgets).

is this more or less correct ?

so, um, when a g_idle_add does a "gtk_widget_show()" on a widget, and that
widget would get displayed as part of the main thread.

Am I correct to say that things like gtk_label_new(), and all the related calls
to build a label widget, can be done in a thread, but the "show" must be done in
the main loop (via the g_adle_add() call) ?

If there a list (or guideline) of which gtk_calls should be done in the idle,
and which need not be ?

many thanks,

- -Greg

> HTH,

yes, it did!

- -G

> Gabriel


- --
+---------------------------------------------------------------------+

Please also check the log file at "/dev/null" for additional information.
                (from /var/log/Xorg.setup.log)

| Greg Hosler                                   ghosler redhat com    |
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