GtkPaned provides methods and properties for
container widgets with two panes whose relative size can be adjusted
by the end user. The panes are arranged horizontally in
GtkHPaned or vertically in
GtkVPaned, and are divided by a handle. By
default, the initial position of the handle is set in accordance with
the size requests of the child widgets.
Note that the panes are defined through their child widgets, i.e. they
have an initial size of zero.
GtkPaned is an abstract base class and cannot
be constructed directly.