#include <gdk/gdkx.h>
#include <gtk/gtk.h>

#include <X11/extensions/Xcomposite.h>

static gboolean
expose_event (GtkWidget *widget,
              GdkEventExpose *event,
              gpointer data)
{
  const char *object = data;

  printf ("Expose event on %s: (%d, %d) %dx%d\n",
          object,
          event->area.x, event->area.y,
          event->area.width, event->area.height);

  return FALSE;
}

int
main (int argc, char **argv)
{
  GtkWidget *window, *event;
  Window xwindow;
  int base, err;

  gtk_init (&argc, &argv);

  if (!XCompositeQueryExtension (GDK_DISPLAY (), &base, &err))
  {
    fprintf (stderr, "testing composite without composite?  hmm..");
    return 1;
  }

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  event = gtk_event_box_new ();

  g_signal_connect (window, "expose-event",
                    G_CALLBACK (expose_event), "parent");
  g_signal_connect (event, "expose-event",
                    G_CALLBACK (expose_event), "child");

  gtk_container_add (GTK_CONTAINER (window), event);
  gtk_widget_show_all (window);

  xwindow = GDK_WINDOW_XWINDOW (event->window);
  XCompositeRedirectWindow (GDK_DISPLAY (), xwindow, CompositeRedirectManual);

#ifdef I_LIKE_XLIB
  for (;;)
  {
    XEvent ev;

    XNextEvent (GDK_DISPLAY (), &ev);

    switch (ev.type)
    {
      case Expose:
        if (ev.xexpose.window == xwindow)
          printf ("expose on the child\n");
        else
          printf ("expose on the parent\n");
        break;
      default:
        printf ("non-expose event: %d\n", ev.type);
    }
  }
#endif

  gtk_main ();
  return 0;
}