Re: ScrollWheel, Xdps and NSEvent modification

[Pierre-Yves Rivaille]

> Well, if it's MacOS-X bloat, I guess we need to add it :-)

MacOS-X bloat is holy bloat ...

> But we should not break the old code in order to add the new stuff - that's 
my
> main concern.
> Basically, to implement the MacOS-X documentaed API we need to have these
> deltas AND eventNumber,
> clickCount, pressure.  We can't remove some values to make way for the new, 
we
> have to increase
> the size of the NSEvent object.

I did it that way because that's the way it's done in MOSX, delta* ivars do 
replace
eventNumber, clickCount and pressure ivars.
I will check if calling eventNumber, clickCount or pressure methods on a 
scrollwheel event leads to an exception on MOSX (it's an exception or a 
default value, as there is no more ivars storing the values).


> At some time in the future I expect to see true 3d pointer devices become
> available
> (ie things where a movement in the third dimension is as natural and easy as 
a
> movement in the normal plane - something I've not seen outside rather 
expensive
> virtual reality systems) and I we obviously do need an API revision for that 
-
> though perhaps the deltas extension would be sufficient for simple
> applications.

deltaZ might also be useful because those IBM trackpoints are also sensitive 
to pressure (at least the one on my thinkpad, so I guess the ones on the mice 
are too). However it will only lead to deltaZ>0 ...