simple X11

来源：互联网发布：空气焓湿图计算软件编辑：程序博客网时间：2024/05/14 03:59

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <X11/Xatom.h>
int main(int argc, char** argv)
{
    sleep(3);
        XSetWindowAttributes winattrs;
    int swidth;
    int sheight;
    int winmask;
    Display *display;
    int screen;
    Window window;

    display = XOpenDisplay(getenv("DISPLAY"));
    screen = DefaultScreen(display);
    swidth = DisplayWidth(display, screen) ;
    sheight = DisplayHeight(display, screen);

    window = XCreateSimpleWindow(display, XDefaultRootWindow(display),
            0, 0, swidth, sheight, 0, 0, 0);
    winattrs.override_redirect = True;
    winmask = CWOverrideRedirect;
    XChangeWindowAttributes(display, window, winmask, &winattrs);

    //
    XSelectInput(display, window, ExposureMask/*|KeyPressMask*/|ButtonPressMask
            |StructureNotifyMask);
    GC gc;
    unsigned long valuemask = 0;
    XGCValues values;
    gc = XCreateGC(display, window, valuemask, &values);



    XMapWindow(display, window);

    const char *strdraw = "Hello, World";
    while(1)
    {
        XEvent event;
        XNextEvent(display, &event);
        switch(event.type)
        {
            case Expose:
                if(event.xexpose.count != 0) break;
                XDrawString(display, window, gc, 10, 10, strdraw, strlen(strdraw));
                break;
            case ButtonPress:
            case KeyPress:
                XFreeGC(display, gc);
                XCloseDisplay(display);
                return 0;
            default:
                break;
        }
    }

    return (EXIT_SUCCESS);
}