Hello,
I try to make a little program based on xlib and xosd, it's a daemon
listening on the keyboard made for example to increase volume level or
other things.
But i have a problem to Ungrab the keyboard, i made a sample of what i
would like to do, if someone see where is the problem
Thanks ! :)
Romain
(gcc devxosd.c -o devxosd -lxosd)
/*
* XOSD TEST
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <linux/types.h>
#include <xosd.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xutil.h>
#include <sys/soundcard.h>
int getSound (void)
{
int fd_mixer, vol;
if ((fd_mixer = open ("/dev/mixer", O_RDWR)) < 0) {
perror ("/dev/mixer");
return -1;
}
if (ioctl (fd_mixer, SOUND_MIXER_READ_VOLUME, &vol) == -1) {
perror ("ioctl");
return -1;
}
if (close(fd_mixer) == -1) {
perror("close");
return -1;
}
return vol&255;
}
int setSound (int v)
{
int fd_mixer, vol;
if ((fd_mixer = open ("/dev/mixer", O_RDWR)) < 0) {
perror ("/dev/mixer");
return -1;
}
vol = (v << 8) | v ;
if (ioctl (fd_mixer, SOUND_MIXER_WRITE_VOLUME, &vol) == -1) {
perror ("ioctl");
return -1;
}
if (close(fd_mixer) == -1) {
perror("close");
return -1;
}
return 0;
}
int volume (int level)
{
Display *disp = NULL;
Window root;
disp = XOpenDisplay(NULL);
if (!disp) {
fprintf(stderr, "Failed to open display\n");
return -1;
}
root = DefaultRootWindow(disp);
/* Xlib */
int nbre;
char chaine[2];
KeySym touche;
/* Xosd */
xosd *osd = NULL;
char *font =
"-adobe-helvetica-bold-r-normal-*-*-240-*-*-p-*-iso8859-1";
char *title = "Volume";
int isUp = 1;
osd = xosd_create (2);
if (osd == NULL) {
perror ("Could not create \"osd\"");
return -1;
}
if (xosd_set_font (osd, font)) {
printf ("Cound not set font\n");
return -1;
}
xosd_set_shadow_offset (osd, 2);
xosd_set_colour (osd, "white");
/* Position */
xosd_set_pos (osd, XOSD_bottom);
xosd_set_vertical_offset (osd, 20);
xosd_set_align (osd, XOSD_center);
xosd_set_horizontal_offset (osd, 0);
xosd_set_bar_length(osd, 20);
xosd_display (osd, 0, XOSD_string, title);
xosd_display (osd, 1, XOSD_percentage, level);
XGrabKeyboard (disp, root, True, GrabModeAsync, GrabModeAsync,
CurrentTime);
while (isUp) {
XEvent ev;
XNextEvent (disp, &ev);
if (ev.type == KeyPress) {
nbre = XLookupString (&ev.xkey, chaine, 2, &touche, 0);
chaine[nbre] = 0;
switch (touche) {
case XK_q:
case XK_Q:
case XK_Escape:
isUp = 0;
break;
case XK_Right:
level = (level > 95 ? 100 : level + 5 );
setSound(level);
xosd_display (osd, 1, XOSD_percentage, level);
break;
case XK_Left:
level = (level < 5 ? 0 : level - 5 );
setSound(level);
xosd_display (osd, 1, XOSD_percentage, level);
break;
default:
break;
}
}
}
XUngrabKeyboard (disp, CurrentTime);
xosd_destroy (osd);
return 0;
}
int main (int argc, char *argv[])
{
volume (getSound());
printf ("I want the keyboard back !\n");
sleep (20);
return 1;
}
--
Romain <buchu@xxxxxxxxxxxx>
/*
* XOSD TEST
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <linux/types.h>
#include <xosd.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xutil.h>
#include <sys/soundcard.h>
int getSound (void)
{
int fd_mixer, vol;
if ((fd_mixer = open ("/dev/mixer", O_RDWR)) < 0) {
perror ("/dev/mixer");
return -1;
}
if (ioctl (fd_mixer, SOUND_MIXER_READ_VOLUME, &vol) == -1) {
perror ("ioctl");
return -1;
}
if (close(fd_mixer) == -1) {
perror("close");
return -1;
}
return vol&255;
}
int setSound (int v)
{
int fd_mixer, vol;
if ((fd_mixer = open ("/dev/mixer", O_RDWR)) < 0) {
perror ("/dev/mixer");
return -1;
}
vol = (v << 8) | v ;
if (ioctl (fd_mixer, SOUND_MIXER_WRITE_VOLUME, &vol) == -1) {
perror ("ioctl");
return -1;
}
if (close(fd_mixer) == -1) {
perror("close");
return -1;
}
return 0;
}
int volume (int level)
{
Display *disp = NULL;
Window root;
disp = XOpenDisplay(NULL);
if (!disp) {
fprintf(stderr, "Failed to open display\n");
return -1;
}
root = DefaultRootWindow(disp);
/* Xlib */
int nbre;
char chaine[2];
KeySym touche;
/* Xosd */
xosd *osd = NULL;
char *font = "-adobe-helvetica-bold-r-normal-*-*-240-*-*-p-*-iso8859-1";
char *title = "Volume";
int isUp = 1;
osd = xosd_create (2);
if (osd == NULL) {
perror ("Could not create \"osd\"");
return -1;
}
if (xosd_set_font (osd, font)) {
printf ("Cound not set font\n");
return -1;
}
xosd_set_shadow_offset (osd, 2);
xosd_set_colour (osd, "white");
/* Position */
xosd_set_pos (osd, XOSD_bottom);
xosd_set_vertical_offset (osd, 20);
xosd_set_align (osd, XOSD_center);
xosd_set_horizontal_offset (osd, 0);
xosd_set_bar_length(osd, 20);
xosd_display (osd, 0, XOSD_string, title);
xosd_display (osd, 1, XOSD_percentage, level);
XGrabKeyboard (disp, root, True, GrabModeAsync, GrabModeAsync, CurrentTime);
while (isUp) {
XEvent ev;
XNextEvent (disp, &ev);
if (ev.type == KeyPress) {
nbre = XLookupString (&ev.xkey, chaine, 2, &touche, 0);
chaine[nbre] = 0;
switch (touche) {
case XK_q:
case XK_Q:
case XK_Escape:
isUp = 0;
break;
case XK_Right:
level = (level > 95 ? 100 : level + 5 );
setSound(level);
xosd_display (osd, 1, XOSD_percentage, level);
break;
case XK_Left:
level = (level < 5 ? 0 : level - 5 );
setSound(level);
xosd_display (osd, 1, XOSD_percentage, level);
break;
default:
break;
}
}
}
XUngrabKeyboard (disp, CurrentTime);
xosd_destroy (osd);
return 0;
}
int main (int argc, char *argv[])
{
volume (getSound());
printf ("I want the keyboard back !\n");
sleep (20);
return 1;
}
