Comment #8 on issue 207 by heue...@gmail.com: Horizontal scrolling causes
+1 to ignoring these events for now instead of throwing an exception for
the release-1.3 branch.
A comment in the Sun bug above describes a workaround for OSX
"Apple have added a workaround for this in Radar #4631846 - horizontal
scrolling creates a MouseWheelEvent with the "Shift" modifier set. This is
a much lower impact method than that specified above and works quite well.
Any chance it could be extended across platform?"
For svn trunk I think Piccolo2D should forward on events to the best of its
ability, and add support to e.g. PInputEvent for these platform-specific
workarounds, in case clients wish to implement horizontal scrolling on
Piccolo2D Developers Group: http://groups.google.com/group/piccolo2d-dev?hl=en