Horizontal and precision scrolling support

[flyingsolomon]

This is the bare minimum for proper scrolling support, however I don't have a mac or a linux setup so it is tested only on windows and doesn't compile on the other platforms.

[zhedye]

Is the problem that scrolling doesn't support an x axis? How would you test this on a computer? How do I horizontally scroll?

[eddi3v]

Is the problem that scrolling doesn't support an x axis? How would you test this on a computer? How do I horizontally scroll?

I have an mx master 3s which has a side-scroll on the mouse. I can test this if needed.

[zhedye]

Thanks for offering to help.

There was a discussion about delaying this patch until a new release version comes out: https://discord.com/channels/657067375681863699/1033468092950528041/1350503994270945341

[flyingsolomon]

The state of things:
Horizontal scroll works on Windows and on Linux, untested on mac
Precise scroll works on Windows, not on Linux, untested on mac

Getting precise values out of scroll events using XLib is apparently very complicated and I have yet to find a simple way to do it, so for now I left fixed values for scroll increments there.
Horizontal scroll using XLib uses undocumented but seemingly standard button values.

[zhedye]

Horizontal scrolling is working on Linux and Mac.

Precise scroll works on Mac.

I will see if I can figure out how to use XLib to get precise scroll values on linux. I looked into it a bit and it does look complicated.

[zhedye]

Here I have a working version of precise scrolling on linux. @flyingsolomon I made a pull request to your repo: flyingsolomon#1

[flyingsolomon]

That's awesome! I'm without a proper computer access until the start of september, so I'll review it then.