a problem about gtk_window_set_gravity

[孙建希 <ycsunjane gmail com>]

hello everyone:

i'm a chinese,my english is poor.

when i use gtk_window_set_gravity ,i encount a problem.

my source code:

#include <gtk/gtk.h>

int main(int argc, const char *argv[])
{
        GtkWidget *window;
        gtk_init(&argc,&argv);
        window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
        gtk_window_set_title(GTK_WINDOW(window),"hello world");

        gtk_window_set_gravity(GTK_WINDOW(window),GDK_GRAVITY_NORTH_EAST);
//this funciton does not work.

        gtk_window_move(GTK_WINDOW(window),200,200);
        gtk_widget_show(window);
        gtk_main();
        return 0;
}

my linux distribution is latest arch.

thanks!