Abstract Base Classes

GtkBin - A container with just one child
GtkBox - Base class for box containers
GtkButtonBox - Base class for GtkHButtonBox and GtkVButtonBox
GtkContainer - Base class for widgets which contain other widgets
GtkItem - Abstract base class for GtkMenuItem, GtkListItem and GtkTreeItem
GtkMisc - Base class for widgets with alignments and padding
GtkObject - The base class of the GTK+ type hierarchy
GtkPaned - Base class for widgets with two adjustable panes
GtkRange - Base class for widgets which visualize an adjustment
GtkScale - Base class for GtkHScale and GtkVScale
GtkScrollbar - Base class for GtkHScrollbar and GtkVScrollbar
GtkSeparator - Base class for GtkHSeparator and GtkVSeparator
GtkWidget - Base class for all widgets
GtkIMContext - Base class for input method contexts