g-object, common-lisp:standard-object, common-lisp:t

gtk-app-chooser-widget, gtk-box, gtk-button-box, gtk-cell-area-box, gtk-cell-renderer-progress, gtk-cell-view, gtk-color-chooser-widget, gtk-color-selection, gtk-file-chooser-button, gtk-file-chooser-widget, gtk-flow-box, gtk-font-chooser-widget, gtk-grid, gtk-info-bar, gtk-level-bar, gtk-paned, gtk-progress-bar, gtk-range, gtk-recent-chooser-widget, gtk-scale, gtk-scale-button, gtk-scrollbar, gtk-separator, gtk-shortcuts-group, gtk-shortcuts-section, gtk-shortcuts-shortcut, gtk-spin-button, gtk-stack-switcher, gtk-statusbar, gtk-tool-palette, gtk-toolbar, gtk-volume-button

An interface for flippable widgets.

The gtk-orientable interface is implemented by all widgets that can be oriented horizontally or vertically. Historically, such widgets have been realized as subclasses of a common base class, e.g. GtkBox, GtkHBox, GtkVBox. The gtk-orientable interface is more flexible in that it allows the orientation to be changed at runtime, allowing the widgets to "flip".