Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!rutgers!ucla-cs!zen!ucbvax!hplabs!hp-pcd!hpcvlo!julie
From: julie@hpcvlo.HP.COM (Julie Skeen)
Newsgroups: comp.windows.x
Subject: Re: Xr11 Example Programs (fixes)
Message-ID: <3940059@hpcvlo.HP.COM>
Date: 28 Dec 87 22:19:48 GMT
References: <3940058@hpcvlo.HP.COM>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 81




/*
 *   Hello World using X
 */
#include <X11/Xlib.h>

main()
{
    Display *display;
    int screen;
    GC gc;
    Window windowId;
    Font f;
    unsigned long border, background;
    XSetWindowAttributes wAttribs;



                                /*
1.  Open the display and default screen specified by the environment
    variable DISPLAY.
                                */

    if ((display=XOpenDisplay (0)) == 0)
        {
        printf ("cannot create a window on %s\n", getenv ("DISPLAY"));
        exit (1);
        }

    screen = DefaultScreen (display);
    border = BlackPixel (display, screen);
    background = WhitePixel (display, screen);



                                /*
2.  Create a window and put it on the display.
                                */

    windowId = XCreateSimpleWindow (display, RootWindow(display, screen),
                                    50, 50, 400, 200, 3, border, background);

    wAttribs.override_redirect = 1;
    XChangeWindowAttributes (display, windowId, CWOverrideRedirect, &wAttribs);

    XMapWindow (display, windowId);



                                /*
3.  Create a Graphics Context.
                                */

    gc = XCreateGC (display, windowId, 0, 0);



                                /*
4.  Send "Hello World" to the window.
                                */

    XDrawString (display, windowId, gc, 100, 80, "Hello World", 11);



                                /*
5.  Send all of those instructions to the X window server to process.
                                */

    XFlush (display);



                                /*
6.  Sleep, Close Display, and exit.
                                */
    sleep (10);
    XCloseDisplay (display);

}