Issue using the "gtk_widget_get_allocated_height" instruction

[Sébastien Le Roux <sebastien leroux ipcms unistra fr>]

Dear all, thanks for reading this,
I recently updated GTK from 3.22.24 to 3.22.30 (Fedora 27 to Fedora 28 
update),
doing so something changed in behaviour of the program I am working on 
(C code) at runtime.

In my program I create a GtkMenuBar widget, using the code:

GtkWidget * win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
GtkWidget * gl_vbox =  gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (win), gl_vbox);
GtkWidget * menu_bar = gtk_menu_bar_new ();
gtk_box_pack_start (GTK_BOX (gl_box), menu_bar, FALSE, FALSE, 0);
GtkWidget * gl_area = gtk_gl_area_new ();
gtk_widget_set_size_request (gl_area, 100, 100);
gtk_box_pack_start (GTK_BOX (gl_box), gl_area, FALSE, FALSE, 0);

Before my update I could get the height of the menu bar after drawing using:

int size = gtk_widget_get_allocated_height (menu_bar);

After my update the value of size is always 1, before the update it was 
around 15,
obviously this new 1 value is messing with my program, not to mention 
that it is not
what I see on the my computer screen, could anyone explain to me what to 
do the get
the proper size of the GtkMenuBar ? (the gtk_widget_get_size_request is 
useless).

Thanks for your help in the matter.

Best regards.

Sébastien Le Roux

--
===========================================================
Dr. Sébastien Le Roux
Ingénieur de Recherche CNRS
Institut de Physique et Chimie des Matériaux de Strasbourg
Département des Matériaux Organiques
23, rue du Loess
BP 43
F-67034 Strasbourg Cedex 2, France
E-mail: sebastien leroux ipcms unistra fr
Webpage: http://www-ipcms.u-strasbg.fr/spip.php?article1771
RINGS project: http://rings-code.sourceforge.net/
ISAACS project: http://isaacs.sourceforge.net/
Fax:   +33 3 88 10 72 46
Phone: +33 3 88 10 71 62
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