[PATCH] xinput: Update for XInput in Xorg 1.4

[Simon Thum]

Hi Phil,

Philip Langdale wrote:
> I think it's just terminology - the mouse acceleration is described by
> a 'PtrFeedbackClass'. There isn't any 'feedback' involved per se.

Very intuitive. I guess it stems from feedback as in feedback loop...
I do assume you are Xinput Maintainer for now. If you look at my patches
(bug#8583), you can see that my approach on device-specific acceleration
is to specify a factor per device which affects acceleration. I chose
this since I deemed it impossible to specify individual acceleration
characteristics (since I looked up xset and found XChangePointerControl).

I guess my code already uses the right spots to support
XChangeFeedbackControl. However, my current approach does not work well
with arbitrary acceleration settings. It is possible to create quite
awkward combinations, and given limited tool support for my approach
people _will_ stumble into this.

A possible solution would be to somehow unify overlapping settings.

But at first let me know how you think about it :)

Regards,

Simon