A vertical box for organizing child widgets.
The GtkVBox container is designed to organize child widgets along a single column, allocating the same width to all children. This overrides any child requisition size, and child widgets that take up less than the allocated width are vertically centered by default.
Adding child widgets to a GtkVBox is done by packing methods that are either inherited from the GtkBox class, such as pack_start() , or by the less flexible add() , common to all container widgets.
See also: GtkHBox, GtkTable, GtkButtonBox, GtkBox, GtkContainer.
GtkVBox ([bool homogeneous = false [, int spacing = 0]]);-- Creates a container for arranging widgets vertically.