On Tue, 2003-10-21 at 07:56, Peter Bergmann wrote:
> Can anyone tell me how to query the real state of a specific key
> (Pressed/Released?) with xlib ?
> Does xkb offer functions for this issue?
XKB allows you to switch to "detectable auto-repeat" mode, where you
get Press/Press/Press/Release rather than
Press/Release Press/Release Press/Release.
You can emulate this on servers without XKB by looking at the timestamps
for the events. (You can look at the GTK+ sources in gtk+/gdk/x11 /
to see both how it uses XKB and how it emulates when XKB is missing)
With that, you should be able to come to something pretty close
to what you want; reference here is the "locate pointer" code in
the GNOME control center
(gnome-control-center/gnome-settings-daemon/gnome-settings-mouse.c)
That shows how to use XGrabKey and XAllowEvents to trap a press/release
of a key without intervening key presses, while otherwise letting
through the key events to applications.
Regards,
Owen
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