Re: GtkWindow show and move

[Iago Rubio <iago iagorubio com>]

On Mon, 2006-07-10 at 21:55 +0200, Atanas Atanasov wrote:
> I have a fragment of code similar to this:
>
> gtk_widget_show_all (window);
> gtk_window_resize (window, ...);
>
> The problem is that sometimes the specified window starts with the
> size I set and sometimes it doesn't. This problem occurs in both debug
> & release versions, and it seems to be completely random. What I know
> is that before a window is shown the resize function acts differently.
> It seems that it works well after the window is shown so as such it is
> a timing issue. If for example I delay for a second between these two
> lines with g_usleep(1000000); everything would be fine. How can I
> solve the problem without introducing any artificial solutions such as
> delays and the similar? 

Try something like this:

gboolean
resize_window_on_idle (gpointer data)
{
        gtk_window_resize (GTK_WINDOW(data), ... , ...);
        return FALSE; 
}


// ...
gtk_widget_show_all (window);
g_idle_add  (resize_window_on_idle,  (gpointer) window);


The window may flicker a bit ( I mean the size change will be visible by the user ) but it will work.

You can also pass a composite structure with the window, width and height to g_idle_add if you want.


> Should I try to purge the message queue
> running gtk_main_iteration while gtk_main_events_pending? 

This may do the trick as well.

> Would it
> make a difference if I use functions like gtk_widget_request_size and
> the alike requests?

If you mean gtk_widget_size_request  yes there will be differences but
not what you want. This will set the preferred size of your window so
you won't be able to shrink it. 

-- 
Iago Rubio