// gcc -o wm_normal_hints wm_normal_hints.c -lX11

#include <X11/Xlib.h>
#include <X11/Xutil.h>

#include <stdio.h>
#include <stdbool.h>

Display *display;
int screen_num;
Window root;

Window create_window(char * name, Window parent, int x, int y, int width, int height, int flags)
{
    XSizeHints sh;
    Window win = XCreateSimpleWindow(display, parent, x, y, width, height,
                                     2, // border width
                                     BlackPixel(display, screen_num),
                                     WhitePixel(display, screen_num));

    sh.width = width;
    sh.height = height;
    sh.x = x;
    sh.y = y;
    sh.flags = flags;
    XSetWMNormalHints(display, win, &sh);

    XStoreName(display, win, name);

    XSelectInput(display, win, KeyPressMask | ButtonPressMask);

    XMapWindow(display, win);

    XFlush(display);
    XSync(display, False);

    return win;
}

int main(int argc, char **argv)
{
    Window window1, window2, window3;
    XEvent ev;
    int i = 0;
    int flags;
    bool done = false;

    char *display_name = NULL;
    if ((display = XOpenDisplay(display_name)) == NULL)
    {
        fprintf(stderr, "Couldn't open %s\n", XDisplayName(display_name));
        return -1;
    }
    screen_num = DefaultScreen(display);
    root = RootWindow(display, screen_num);

    while (1)
      {
        switch (i%3)
          {
          case 0:
            flags = 0;
            fprintf(stderr, "no flags\n");
            break;

          case 1:
            flags = PPosition;
            fprintf(stderr, "flags = PPosition\n");
            break;

          case 2:
            flags = USPosition;
            fprintf(stderr, "flags = USPosition\n");
            break;
          }
        i++;

        window1 = create_window("Test -ve", root, -100, -100, 200, 100, flags);
        window2 = create_window("Test origin", root, 0, 0, 200, 100, flags);
        window3 = create_window("Test +ve", root, 100, 100, 200, 100, flags);

        while (1)
          {
            XNextEvent(display, &ev);

            fprintf(stderr, "event on frame %i: ", ev.xany.window);
            fprintf(stderr, "%d\n", ev.xany.type);

            if (ev.type == ButtonPress)
                break;
          }

        XDestroyWindow(display, window1);
        XDestroyWindow(display, window2);
        XDestroyWindow(display, window3);

        if (done)
          break;
      }

    return 0;
}