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xmappingnotify.c
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// Compile command:
// gcc -Wall -O2 xmappingnotify.c -o xmappingnotify -lX11
#include <stdio.h>
#include <X11/Xutil.h>
#include <X11/XKBlib.h>
int main(int argc, char **argv)
{
XEvent e;
Display *d;
if (!(d = XOpenDisplay(NULL))) {
fprintf(stderr, "cannot open display\n");
return 1;
}
XKeysymToKeycode(d, XK_F1);
int xkbEventType;
XkbQueryExtension(d, 0, &xkbEventType, 0, 0, 0);
// XkbSelectEvents(d, XkbUseCoreKbd, XkbAllEventsMask, XkbAllEventsMask); // arxiko
// XkbSelectEventDetails(d, XkbUseCoreKbd, XkbMapNotifyMask, XkbAllEventsMask, XkbAllEventsMask); // δικό μου, παίζει καλύτερα, δεν σκανάρει και το ποντίκι, βλέπει caps lock
XkbSelectEventDetails(d, XkbUseCoreKbd, XkbStateNotify, XkbAllStateComponentsMask, XkbGroupStateMask); // του ρώσου, δεν σκανάρει πλήκτρα, μόνο την αλλαγή γλώσσας. Δεν βλέπει caps
XSync(d, False);
while (1) {
XNextEvent(d, &e);
if (e.type == xkbEventType) {
XkbEvent* xkbEvent = (XkbEvent*) &e;
if (xkbEvent->any.xkb_type == XkbStateNotify) {
int lang = xkbEvent->state.group;
if (lang == 1) {
fprintf(stdout, "1\n");
fflush(stdout);
} else {
fprintf(stdout, "0\n");
fflush(stdout);
}
}
}
}
return(0);
}