Used to customize the appearance of a GtkToolbar. Note that setting the toolbar style overrides the user's preferences for the default toolbar style.
Value | Symbolic name | Description |
| 0 | Gtk::TOOLBAR_ICONS | Buttons display only icons in the toolbar. |
| 1 | Gtk::TOOLBAR_TEXT | Buttons display only text labels in the toolbar. |
| 2 | Gtk::TOOLBAR_BOTH | Buttons display text and icons in the toolbar. |
| 3 | Gtk::TOOLBAR_BOTH_HORIZ | Buttons display icons and text alongside each other, rather than vertically stacked |