A GtkStatusbar is a framed label, usually added
to the bottom of a window, that provides a way to report messages of
minor importance. It is usually updated fairly frequently.
There are two indices in the structure of a statusbar; one is an
associative array of message information, and the other is a stack of
uniquely-indexed message arrays. The message at the top of the stack is
the one currently on display.
Where a routine requires a lot of processing, the statusbar may
be unable to update during the time taken to do so. You will need to
call
each time the bar has been updated, to allow updating throughout.
