GtkButtonsType
Prebuilt sets of buttons for the dialog. If none of these choices are appropriate, simply use Gtk::BUTTONS_NONE then call add_buttons() .
Value | Symbolic name | Description |
  0 | Gtk::BUTTONS_NONE | No buttons at all. |
  1 | Gtk::BUTTONS_OK | An OK button. |
  2 | Gtk::BUTTONS_CLOSE | A Close button. |
  3 | Gtk::BUTTONS_CANCEL | A Cancel button. |
  4 | Gtk::BUTTONS_YES_NO | Yes and No buttons. |
  5 | Gtk::BUTTONS_OK_CANCEL | OK and Cancel buttons. |