Represents the orientation of widgets which can be switched between horizontal
and vertical orientation on the fly, like GtkToolbar.
GTK_ORIENTATION_HORIZONTAL
The widget is in horizontal orientation.
GTK_ORIENTATION_VERTICAL
The widget is in vertical orientation.
Represents the orientation of widgets which can be switched between horizontal and vertical orientation on the fly, like GtkToolbar. GTK_ORIENTATION_HORIZONTAL The widget is in horizontal orientation. GTK_ORIENTATION_VERTICAL The widget is in vertical orientation.