Container for arranging buttons in a row.
A button box can be used to provide a consistent layout of buttons through
an application. A GtkHButtonBox arranges buttons in
Adding buttons to a GtkHButtonBox is done the same
way widgets are added to other containers, using
add() . The
pack_end methods work exactly as
add() , adding widgets according to
the current layout style and depending on whether the child button has had
set_child_secondary() called on it.
The spacing between buttons can be set with
set_spacing() . The arrangement and layout
of the buttons can be changed with
Creates a new GtkHButtonBox.