Needed because there is no such thing in java-gnome yet.
*** Bug 1574 has been marked as a duplicate of this bug. ***
I've managed to get the mouseMotionListener in Java-gnome working partially,
except it still exhibits strange behavior with TextView and TreeView (which,
incidentally, are the widgets we need it for)
It now works for TextView, and there is only a minor glitch in TreeView that
prevents it from working normally. I'm considering this bug resolved