LinuxQuestions.org - help with gtk_ui

I'm trying to write a small program using gtk+-2.4 but I'm having some problems with gtk_ui_manager. I can get the initial menus to display, but I'm having trouble changing the menus while the program is running. Here's some sample code:

Code:

#include <gtk/gtk.h>



int main(int argc, char **argv)

{

    GtkUIManager *ui;

    GtkActionGroup *menuactions;

    GtkAction *action;

    GtkWidget *main_window;

    GtkWidget *menubar;

    GError *error = NULL;

    

    gtk_init(&argc, &argv);

    

    ui = gtk_ui_manager_new();

    

    menuactions = gtk_action_group_new("MenuActions");

    action = gtk_action_new("MenuAction", "Menu", NULL, NULL);

    gtk_action_group_add_action(menuactions, action);

    action = gtk_action_new("SubMenuAction", "Submenu", NULL, NULL);

    gtk_action_group_add_action(menuactions, action);

    action = gtk_action_new("ItemAction", "Item", NULL, NULL);

    gtk_action_group_add_action(menuactions, action);

    action = gtk_action_new("ItemAction2", "Item2", NULL, NULL);

    gtk_action_group_add_action(menuactions, action);

    gtk_ui_manager_insert_action_group(ui, menuactions, 1);

    

    gtk_ui_manager_add_ui_from_file(ui, "menus.xml", &error);

    gtk_ui_manager_add_ui(ui, gtk_ui_manager_new_merge_id(ui),

                          "/ui/menubar/File/SubMenu", "Item2", "ItemAction2",

                          GTK_UI_MANAGER_MENUITEM, TRUE);

    //gtk_ui_manager_add_ui_from_file(ui, "moremenus.xml", &error);

    menubar = gtk_ui_manager_get_widget(ui, "/menubar");

    

    main_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

    gtk_container_add(GTK_CONTAINER(main_window), menubar);

    gtk_widget_show_all(main_window);

    

    gtk_main();

}

And here is the menus.xml file:

Code:

<ui>

  <menubar>

    <menu name="Menu" action="MenuAction">

      <menu name="SubMenu" action="SubMenuAction">

        <menuitem name="MenuItem" action="ItemAction" />

      </menu>

    </menu>

  </menubar>

</ui>

And the moremenus.xml file:

Code:

<ui>

  <menubar>

    <menu name="Menu" action="MenuAction">

      <menu name="SubMenu" action="SubMenuAction">

        <menuitem name="Item2" action="ItemAction2" />

      </menu>

    </menu>

  </menubar>

</ui>

The problem is that Item2 doesn't appear in the Submenu. If I delete the gtk_ui_manager_add_ui() function call and uncomment the gtk_ui_manager_add_ui_from_file() call, it works. But its really inconvenient for me to have to specify all the menus in a file - I want to be able to insert menu items using a pathname. Does anyone know how to use gtk_ui_manager_add_ui() properly?