Add mousewheel emulation and support for trailing comments in ds4drv.conf.

[liftoff]

uinput.py: Added support for emulating a mousewheel (up or down). uinput.py: Added support for trailing comments in ds4drv.conf files. ds4drv.conf: Added scroll wheel emulation example.

[chrippa]

A couple of issues I'd like to see fixed before I merge this:

• Don't use datetime, it's much slower than just using time.time.
• The trailing comments fix should probably be done in config.py instead, also put it in a separate commit.
• Line 391 - You can't return here, you'll end up breaking out of the loop while there may still be items left. Instead move the other mouse stuff so you'll end up with:

if name in (ecodes.REL_WHEELUP, ecodes.REL_WHEELDOWN):
  ... the scroll wheel stuff here
else:
  ... move the other mouse stuff here

• Instead of hijacking self._write_cache, create new a dict for each storage need.
• I don't quite understand the meaning of the incrementing value you have in self._write_cache[name+1000], shouldn't triggering the key repeat via time be smoother?

[liftoff]

OK I'll take care of that stuff. No problem.

As for triggering key repeat based on time: I forget why I did it that way, LOL. It was late. Your way is probably better :smile: