Trouble setting the value of a GtkAdjustment

[Richard Shann <richard rshann plus com>]

Compiling with Gtk 3.14.5
I can't seem to set the "value" of a GtkAdjustment once I have added a widget to it with gtk_container_add(), 
it seems to be locked at 0.0

The code looks like this fragment:

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 GtkAdjustment *ADJ = gtk_adjustment_new (1.5, 0.0, 2.0, 0.01, 0.01, 0.01); 
   
 GtkWidget *sw = gtk_scrolled_window_new (ADJ , gtk_adjustment_new (1.5, 0.0, 2.0, 0.01, 0.01, 0.01));
 gtk_container_add (GTK_CONTAINER(keyboard_window), sw);
 gtk_container_add (GTK_CONTAINER(sw), keyboard);
 
 gtk_adjustment_set_value (ADJ, 1.22222); 

 g_print ("value %p is %f\n", ADJ, gtk_adjustment_get_value (ADJ));

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where keyboard_window is a toplevel GtkWindow, and keyboard is a GtkGrid.

The value printed out is always 0.0 after the widget is added to the scrolled window.

Can anyone help? I'm trying to center the scroll-bars on the window.

Richard Shann