[enriquto]

Thanks! I'm going to try it. What made you go for xcb instead of (arguably simpler) xlib?

[mcpcpc]

XCB is closer to the X protocol, making it significantly smaller and generally faster (and more responsive) than Xlib.

The argument of simplicity for source is relative to the API implementation. In this use case, the XCB API is the clear winner (imho).