Writing a lockscreen for Linux?

I've been looking around for a nice locks开发者_运维技巧creen to use with my XFCE system, but it seems like there are any slim lock screens around. I'm currently using slock, but it's just a blank screen with absolutely no interface whatsoever.

I'm looking to code a lockscreen in Python. I looked at the source code for slock, and it seems like I have to interface with Xorg somehow.

Does anybody know anything about writing lockscreens?

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If you want to go low-level, you can use python xcb bindings.

If you want to use higher level bindings, you may find this tutorial on writing a screen saver with Qt useful. Porting it to PyQt should be quite straightforward. I'm pretty sure similar resources exist for GTK.