Abstract Base Classes

GtkBin — A container with just one child
GtkContainer — Base class for widgets which contain other widgets
GtkItem — Abstract base class for GtkMenuItem, GtkListItem and GtkTreeItem
GtkMenuShell — A base class for menu objects
GtkMisc — Base class for widgets with alignments and padding
GtkObject — The base class of the GTK+ type hierarchy
GtkRange — Base class for widgets which visualize an adjustment
GtkWidget — Base class for all widgets
GtkIMContext — Base class for input method contexts