The ListItem widget is designed to act as a container holding up to
one child, providing functions for selection/deselection just like the
List widget requires them for its children.
A ListItem has its own window to receive events and has its own
background color which is usually white.
As it is directly derived from an Item it can be treated as such by
using the GTK_ITEM(ListItem) macro, see the Item widget for more on
this. Usually a ListItem just holds a label to identify, e.g., a
filename within a List -- therefore the convenience function
gtk_list_item_new_with_label() is provided. The same effect can be
achieved by creating a Label on its own, setting its alignment to
xalign=0 and yalign=0.5 with a subsequent container addition to the
ListItem.
As one is not forced to add a GtkLabel to a GtkListItem, you could
also add a GtkVBox or a GtkArrow etc. to the GtkListItem.
