widget array

[Ariel Flashner <flashner 012 net il>]

Hi,
I would like to load a few widgets and then be able to run some code
when a "enter_notify_event" occurs...
I've done it this way:
1. (i defined a structure)
struct satellite {
	GtkWidget *sat_menu_items;
	gchar *ip;
};

(i created the widgets inside a certain function)
struct sat_map *sat;
GtkWidget *fixed;
	fixed = lookup_widget (frmMain, "fixed");

		sat = g_malloc( sizeof( *sat ) );
		sat->img = create_pixmap (fixed, "sat.jpg");
		gtk_widget_set_size_request (sat->img, 16, 16);
		sat->evnt = gtk_event_box_new();
		sat->frmInfo = gtk_button_new_with_label ("bla");
		gtk_container_add (GTK_CONTAINER (sat->evnt), sat->img);
		gtk_fixed_put (GTK_FIXED(fixed), sat->evnt, gps_x, gps_y);
		gtk_fixed_put (GTK_FIXED(fixed), sat->frmInfo, gps_x, gps_y + 16);
		gtk_widget_show (sat->evnt);
		gtk_widget_show (sat->img);

		
		g_signal_connect_swapped (G_OBJECT (sat->evnt), "enter_notify_event",
			G_CALLBACK (on_SatEnter), (gpointer) sat);
		g_signal_connect_swapped (G_OBJECT (sat->evnt), "leave_notify_event",
			G_CALLBACK (on_SatLeave), (gpointer) sat);

		g_free (sat);



(then, in the call back functions)

void on_SatEnter (gpointer user_data)
{
struct sat_map *sat;
	sat =  user_data;
	gtk_widget_show (GTK_WIDGET(sat->frmInfo));
}

void on_SatLeave (gpointer user_data)
{
struct sat_map *sat;
	sat =  user_data;
	gtk_widget_destroy (GTK_WIDGET(sat->frmInfo));
}


The program compiles with now errors/warninngs but when i run it, it
gives me an error and terminates the program.
the error is (when i debug it with gdb):
"Program received signal SIGSEGV, Segmentation fault.
0x4041db12 in g_type_check_instance_cast () from
/usr/lib/libgobject-2.0.so.0"

What am I doing wrong here?
Is there another easy way to do what I want to accomplish?

Thanks.