Used to dictate the style that a GtkButtonBox uses to layout the buttons it contains. (See also: GtkVButtonBox and GtkHButtonBox).
Value | Symbolic name | Description |
| 0 | Gtk::BUTTONBOX_DEFAULT_STYLE | Default packing. |
| 1 | Gtk::BUTTONBOX_SPREAD | Buttons are evenly spread across the ButtonBox. |
| 2 | Gtk::BUTTONBOX_EDGE | Buttons are placed at the edges of the ButtonBox. |
| 3 | Gtk::BUTTONBOX_START | Buttons are grouped towards the start of box, (on the left for a HBox, or the top for a VBox). |
| 4 | Gtk::BUTTONBOX_END | Buttons are grouped towards the end of a box, (on the right for a HBox, or the bottom for a VBox) |