A listener to be registered upon the combo box
(
not its popup menu)
to handle mouse events
that affect the state of the popup menu.
A listener to be registered upon the combo box
(
not its popup menu)
to handle mouse events
that affect the state of the popup menu.
The main purpose of this listener is to make the popup menu
appear and disappear.
This listener also helps
with click-and-drag scenarios by setting the selection if the mouse was
released over the list during a drag.
Warning:
We recommend that you not
create subclasses of this class.
If you absolutely must create a subclass,
be sure to invoke the superclass
version of each method.