xdemo.c
author Markus Bröker <mbroeker@largo.dyndns.tv>
Thu, 16 Apr 2009 12:51:16 +0200
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numbering game: guess a value It was a short contest in IRC. Write a numbering game. Anyway, i have lost: The winner realized it in 12 lines. committer: Markus Bröker <mbroeker@largo.homelinux.org>
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/**
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 * xdemo.c
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 * Copyright (C) 2008 Markus Broeker
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <X11/Xlib.h>
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int main (int argc, char **argv)
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{
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    Window w = 0;
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    Display *dpy = XOpenDisplay (NULL);
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    XEvent xev;
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    int active;
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    if (dpy == NULL) {
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        printf ("Error opening localhost:0\n");
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        return EXIT_FAILURE;
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    }
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    XSynchronize (dpy, 1);
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    w = XCreateSimpleWindow (dpy, DefaultRootWindow (dpy), 0, 0, 240, 60, 1, 1, 1);
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    if (w < 0)
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        return EXIT_FAILURE;
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    printf ("WINDOW-ID: %ld\n", w);
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    XRaiseWindow (dpy, w);
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    XMapWindow (dpy, w);
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    printf ("Press ESC to quit\n");
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    active = 1;
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    XSelectInput (dpy, w, KeyPressMask);
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    while (active) {
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        XNextEvent (dpy, &xev);
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        switch (xev.type) {
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        case KeyPress:
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            if (xev.xkey.keycode == 9)
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                active = 0;
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            printf ("Keycode = %2u\n", xev.xkey.keycode);
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            break;
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        default:
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            printf ("Unknown Event: %d\n", xev.type);
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        }
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    }
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    XDestroyWindow (dpy, w);
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    XCloseDisplay (dpy);
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    return EXIT_SUCCESS;
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}