Portable keycodes in X11?
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01-10-2019 - |
Question
I want to get mapping-independent key codes, but documentation says that "keycode" in XKeyEvent structure depends on hardware and driver and I can't rely on it. How can I get some portable key codes like VK_* in Windows?
Solution
You want key syms, not key codes. See XKeycodeToKeysym() and /usr/include/X11/keysymdef.h
To be strictly correct (especially with internationalization) you need a whole bunch of code along the lines of http://git.gnome.org/browse/gtk+/tree/gdk/x11/gdkkeys-x11.c However, if you're using raw Xlib instead of a toolkit you probably don't care about this kind of thing (if you do you're in for years of work), and XKeycodeToKeysym() is good enough for US keyboards.
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