GtkComboBox focus issue

[Pramod Patangay <pramod patangay gmail com>]

Hi,

I am trying to grab focus to GtkComboBox but focus is not set to it.
Here's a sample program. What's wrong with the code?

gboolean kp(GtkWidget *w, GdkEvent* e, gpointer d)
{
	printf("Key Pressed\n");
	gtk_widget_grab_focus(GTK_WIDGET(d));
	return TRUE;
}

int main( int   argc, char *argv[] )
{

	gtk_init (&argc, &argv);

	GtkWidget *dialog = gtk_window_new(GTK_WINDOW_TOPLEVEL);

	GtkWidget* l = gtk_layout_new(NULL,NULL);
	gtk_widget_show(l);
	GtkWidget* b = gtk_button_new_from_stock(GTK_STOCK_FLOPPY);
	gtk_layout_put(GTK_LAYOUT(l),b,40,70);
	
	ts = gtk_tree_store_new(1, G_TYPE_STRING);
	GtkCellRenderer* cr = gtk_cell_renderer_text_new();
	GtkTreeIter iter;

	gtk_tree_store_insert(ts, &iter, NULL, 0);
	gtk_tree_store_set(ts, &iter, 0, "FIRST", -1);

	combo = gtk_combo_box_new_with_model(GTK_TREE_MODEL(ts));
	gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo),cr,FALSE);
	gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo),cr,"text",0,NULL);

	gtk_combo_box_set_active(GTK_COMBO_BOX(combo),0);
	gtk_widget_show(combo);
	gtk_layout_put(GTK_LAYOUT(l),combo,20,20);
	gtk_widget_grab_focus(b);
	gtk_widget_show(b);
	
	g_signal_connect(b,"key-press-event",G_CALLBACK(kp),combo);
	
	gtk_container_add(GTK_CONTAINER(dialog),l);
	gtk_widget_show(dialog);

	gtk_main();

	return 0;
}

Thanks