xtma/xtma.c

   1 /******************************************************************************
   2  * xtma.c
   3  *****************************************************************************/
   4
   5 #include <stdio.h>
   6 #include <string.h>
   7 #include <stdlib.h>
   8 #include <unistd.h>
   9
  10 #include <X11/Xlib.h>
  11 #include <X11/keysym.h>
  12
  13
  14 int main(int argc, char ** argv)
  15 {
  16     Display *dpy;
  17     int      screen;
  18     int      dispw;
  19     int      disph;
  20     Window   win;
  21     int run = 1;
  22     XEvent xev;
  23     Atom wm_state, fs;
  24     Pixmap bm_no;
  25     Colormap cmap;
  26     Cursor no_ptr;
  27     XColor black, dummy;
  28     static char bm_no_data[] = {0, 0, 0, 0, 0, 0, 0, 0};
  29
  30     close(0); close(1); close(2);
  31
  32     while(1)
  33     {
  34         dpy = XOpenDisplay("");
  35         if(NULL != dpy) break;
  36         sleep(1);
  37     }
  38
  39     screen = DefaultScreen(dpy);
  40     dispw = XDisplayWidth(dpy, screen);
  41     disph = XDisplayHeight(dpy, screen);
  42
  43     win = XCreateSimpleWindow(dpy, RootWindow(dpy, screen), 0, 0, 1, 1, 0, WhitePixel(dpy, screen), BlackPixel(dpy, screen));
  44
  45     /* disable the cursor: http://www.linuxforums.org/forum/linux-programming-scripting/59012-xlib-hide-mouse-pointer.html */
  46     cmap = DefaultColormap(dpy, screen);
  47     XAllocNamedColor(dpy, cmap, "black", &black, &dummy);
  48     bm_no = XCreateBitmapFromData(dpy, win, bm_no_data, 8, 8);
  49     no_ptr = XCreatePixmapCursor(dpy, bm_no, bm_no, &black, &black, 0, 0);
  50     XDefineCursor(dpy, win, no_ptr);
  51
  52     /* name */
  53     XStoreName(dpy, win, "xtma");
  54
  55     /* show the window */
  56     XMapRaised(dpy, win);
  57
  58     /* listen for mouse and kbd */
  59     XSelectInput(dpy, win, KeyPressMask | ButtonPressMask);
  60
  61     /* fullscreen */
  62     wm_state = XInternAtom(dpy, "_NET_WM_STATE", True);
  63     fs = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", True);
  64     memset(&xev, 0, sizeof(xev));
  65     xev.type = ClientMessage;
  66     xev.xclient.serial = 0;
  67     xev.xclient.send_event=True;
  68     xev.xclient.window = win;
  69     xev.xclient.message_type = wm_state;
  70     xev.xclient.format = 32;
  71     xev.xclient.data.l[0] = 1;
  72     xev.xclient.data.l[1] = fs;
  73     xev.xclient.data.l[2] = 0;
  74     XSendEvent(dpy, DefaultRootWindow(dpy), False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);
  75     XFlush(dpy);
  76
  77
  78     while(run)
  79     {
  80         XNextEvent(dpy, &xev);
  81         if(ButtonPress == xev.type || (KeyPress == xev.type && XK_Escape == (XLookupKeysym((XKeyEvent *)&xev, 0)))) run = 0;
  82     }
  83
  84
  85     XCloseDisplay(dpy);
  86
  87     return 0;
  88 } /* main() */
  89