Smooth scrolling

[Max Schwarz]

Hi,

I got my simple testbench to work now:
xorg-input-evdev sends high resolution scroll information generated by the 
wheel emulation code into the server, and my client app (pscrolltest) receives 
it along with resolution information.

I will start implementing the feature in toolkits and if needed single 
applications now. Qt looks fairly easy, as they have a "delta" field in their 
QWheelEvent class which I could use.
GTK/GDK is a completely different matter, though. They use a "GdkEventScroll", 
which is sent out once per scroll wheel button press. This means I can't use 
it directly (adding a delta field of some sort), because current applications 
relying on this behaviour will stop working / scroll uncontrollably.

Anyone got an idea for that one? I think I will ask on the gtk mailing list as 
well. My proposal would be to introduce a new event type for higher resolution 
scrolling, but perhaps it can be avoided.

Anyway, my code is available for anyone interested at
http://github.com/x-quadraht/pscroll

Max