Re: getting real widget sizes how and when

[Tristan Van Berkom <tvb gnome org>]

Karl H. Beckers wrote:
[...]
> > So maybe the solution to your problem is: "Widgets in an area of a
> > GtkViewport that is not shown (i.e. not in part of the scrolled window)
> > /dont have a size/".
> Well, I've realized that and AM doing a gtk_widget_show before 
> attempting to get the sizes.
> But the dialog does not seem to be rendered immediately.

I anticipated that misunderstanding and still managed to not
get across properly, when I say "shown" I really mean "shown",
not flagged with GTK_WIDGET_VISIBLE flag via the gtk_widget_show()
api :)

The viewport probably doesn't care about allocating any space for
a child widget that is not in the viewing area, regardless of
that widget's visibility flag.

> Ooops ... just thought of smth....
> What I'm doing is check parameters for an app and pop up a modal warning 
> dialog if smth. is wrong.
> Now, atm I'm doing this before I start the main loop .... does that 
> sound like an explanation?

Yes,
   "configure-event" should work for you, its emitted for resizes in
general, but I believe there is an initial configure-event fired
at allocation time.

Cheers,
                           -Tristan