Hmmm.... If you flush the X buffer after the ungrab call. Just add
XFlush(disp);
That should do it... I hope :)
BTW, I would have grabbed the keys insted of the whole keyboard.
/hesa
On Tue, 2004-04-20 at 20:28, Romain wrote:
> Humm nobody know where i can find help ?
>
> On Mon, 2004-04-19 at 01:39, Romain wrote:
> > 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;
> > }
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