Re: How to make a progress-bar thinner?

[Benjamin Otte <otte gnome org>]

2 things:
1) You cannot force widgets smaller than their minimum size in GTK 3. This was
allowed in GTK 2. (And it crashed only sometimes!)
2) You can try to use gtk_widget_set_halign/valign() to make sure the widget
doesn't fill the space it's assigned to.

bonus:
While you look into sizing, you might also want to look into
gtk_widget_set_hexpand/vexpand().

Benjamin