/* gcc `pkg-config --cflags --libs gtk+-2.0` -o big-combo big-combo.c */

#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#include <signal.h>

static void
sighandler (int sig) {
  gtk_main_quit ();
}

gboolean
t_cb (gpointer data)
{
    GtkWidget *widget = data;

    GdkDrawable* rootWindow = GDK_DRAWABLE(gtk_widget_get_root_window(widget));
    GdkDisplay* display = gdk_drawable_get_display(rootWindow);
    Atom xproperty = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WORKAREA");

    Atom retType;
    int retFormat;
    long *workAreaPos = NULL;
    unsigned long retNItems;
    unsigned long retAfter;
    int xRes = XGetWindowProperty(GDK_DISPLAY_XDISPLAY (display), GDK_WINDOW_XWINDOW (rootWindow), xproperty,
        0, 4, FALSE, XA_CARDINAL, &retType, &retFormat, &retNItems, &retAfter, (guchar**)&workAreaPos);

    g_assert(retType == XA_CARDINAL);
    g_printerr ("retFormat: %d, retNItems: %ld, retAfter: %ld, workAreaPos: %p\n",
                retFormat, retNItems, retAfter, workAreaPos);
    /*if (xRes != Success ||
        workAreaPos == NULL ||
        retType != XA_CARDINAL ||
        4 * sizeof(long) != length_returned ||
        retFormat != 32)
        g_warning("Can not determine workarea");
    else
        g_print("# %d [%d %d %d %d] lr:%d\n", 42,//*nworkAreaPos,
                workAreaPos[0], workAreaPos[1], workAreaPos[2], workAreaPos[3], length_returned);*/

    if (workAreaPos)
        XFree(workAreaPos);

    return FALSE;
}

int main(int argc, char *argv[])
{
    GtkWidget *combo_box;
    GtkWidget *window;
    gint i;

  signal(SIGINT, sighandler);
    gtk_init (&argc, &argv);
    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_widget_show_all (window);
    g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL);

    g_timeout_add (100, t_cb, window);
    gtk_main ();

    return 0;
    combo_box = gtk_combo_box_new_text ();
    for (i = 0; i < 1000; i++) {
        gtk_combo_box_append_text (GTK_COMBO_BOX (combo_box), "Test");
        /*GtkItem *item;

        item = gtk_menu_item_new_with_label(combo_box, "Hello");
        gtk_menu_shell_append(GTK_MENU_SHELL(m_popup), item);*/
    }

    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL);
    gtk_container_add (GTK_CONTAINER (window), combo_box);

    gtk_widget_show_all (window);

    gtk_main ();
}