Tray icon: click, wheel behaviour: can it be improved

I was wondering, if scroll up and down could be associated to next and prev track, as on gnome at least, volume applet already offers the volume control with the wheel mouse.
Here is a piece of code going to /usr/lib/exaile/xlgui/tray.py
    def _scrolled(self, icon, event):
 if event.state:
  if event.direction == gtk.gdk.SCROLL_UP:
   self.queue.next()
  elif event.direction == gtk.gdk.SCROLL_DOWN:
   self.queue.prev()
If would be even better if, keeping the middle click button press on the tray icon while scrolling, would ff and fw to seek the song.
I know the current plugin as horizontal scroll offering something close to this feature, but, two direction wheels aren't that common.