Tooltips are the messages that appear next to a widget when the
mouse pointer is held over it for a short amount of time. They are
especially helpful for adding more verbose descriptions of things
such as buttons in a toolbar.
An individual tooltip belongs to a group of tooltips. A group is
created with a call to GTK2.Tooltips(). Every tooltip in the
group can then be turned off with a call to disable()
and enabled with enable().
The length of time the user must keep the mouse over a widget
before the tip is shown, can be altered with set_delay(). This is
set on a 'per group of tooltips' basis.
To assign a tip to a particular W(Widget), set_tip() is used.
The default appearance of all tooltips in a program is determined
by the current gtk theme that the user has selected. To change the
tooltip appearance manually, use set_colors(). Again, this is per
group of tooltips.
GTK2.Toolbar()->unset_style()