[PATCH 27/27] Input: Add smooth-scrolling support to GetPointerEvents

[Daniel Stone]

On Fri, Jun 10, 2011 at 03:57:53PM +1000, Peter Hutterer wrote:
> On Thu, Jun 09, 2011 at 04:19:14PM +0100, Daniel Stone wrote:
> > > a bit of a side-issue with this approach is that the scroll events lose
> > > valuator information. we hit that one with the wacom driver where one of my
> > > patches started submitting button events with first/num_valuators as 0/0. it
> > > is then impossible for the client to get valuator information without
> > > tracking motion events (which may be quite costly and I'm not sure all
> > > clients do).
> > > 
> > > so we went back to submitting the current valuator state with _every_ button
> > > event. This patch suffers from the same issue. If you scroll, there is no
> > > information about the other axes. Which for relative devices doesn't matter
> > > much but for absolute devices it certainly does.
> > 
> > Hmph, so is that just a matter of dropping the current x and y in the
> > mask then?
> 
> it pretty much means that you have to pass the valuator mask as provided by
> the driver into each GPE for emulated scroll events.

OK, easy enough.  Will fix for v3.

Cheers,
Daniel