User data in gnome menus

["Carlos Fernández" <carlicus hotmail com>]

I have a problem with the user_data parameter of a GnomeUIInfo structure.
My project is made of several c files, but i'm not going to send you all of 
them, i'll only extract the most important piece of code.

/******************************************/
/********** main_window.c *****************/
/******************************************/
GtkWidget *app;
app = gnome_app_new("GnomeGps", "GnomeGps");
ggps_install_menu_bar(app); /*This function is in bars.c*/


/******************************************/
/********** bars.c ************************/
/******************************************/
static GnomeUIInfo file_menu[] = {
	GNOMEUIINFO_MENU_OPEN_ITEM(file_open_cb, NULL),
	GNOMEUIINFO_SEPARATOR,
	GNOMEUIINFO_END
};

static GnomeUIInfo main_menu[] = {
	GNOMEUIINFO_MENU_FILE_TREE(file_menu),
	GNOMEUIINFO_END
};

void ggps_install_menu_bar(GtkWidget *app)
{
	gnome_app_create_menus_with_data(GNOME_APP(app), main_menu, app); /*This 
function is in open.c*/
}


/***************************************/
/********** open.c *********************/
/***************************************/
void file_open_cb (GtkWidget *widget, gpointer data)
{
	GtkWidget *open_file_selector;
	open_file_selector = gtk_file_selection_new(NULL);

	gtk_window_set_modal (GTK_WINDOW (open_file_selector), TRUE);
	gtk_window_set_transient_for(GTK_WINDOW(open_file_selector), 
GTK_WINDOW((GtkWidget *)app)); /*THE PROBLEM IS HERE!!*/
	...
	gtk_widget_show (open_file_selector);
}


That's to say, i'm opening a file selection dialog when clicking on the 
option "open" in the file menu. The problem is that i think the "gpointer 
data" parameter (in the function file_open_cb should point to the "app" 
variable, because i do that when i call 
gnome_app_create_menus_with_data(...,...,app).
This does NOT work. Please What i'm doing wrong? I only want to use the 
"app" variable from the file main_window.c in the file open.c (but without 
using extern variables). Please correct my code or give me a new way of 
doing it.


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