Re: Welcome to the "gtk-app-devel-list" mailing list

["Shantanu Kumar" <shantanu_k06 rediffmail com>]

Hi,

Is it possible to add menuitems to a menu at runtime? I mean, when 
the menu is already displayed? And same, is it possible to 
set/remove submenus to menuitems at runtime?

I am listing below a small program below, which is a sample of 
what I have been unsuccessfully trying to do. Any 
pointers/guidance will be of immense help.

Code listing :-


#include <gtk/gtk.h>

void callback(GtkButton *button, gpointer user_data) {
        GtkMenu *submenu = (GtkMenu *) user_data;
        g_print("Adding label item to submenu...");
	gtk_menu_append(submenu, 
gtk_menu_item_new_with_label("Test"));
        g_print("...adding done\n");
}

void exitfunc(GtkWidget *widget, gpointer user_data) {
        gtk_main_quit();
}

int main(int argc, char *argv[]) {
        GtkMenu *menu, *submenu;
        GtkWidget *item1, *item2;

        // initialize
        gtk_init(&argc, &argv);
        menu = (GtkMenu *) gtk_menu_new();
        submenu = (GtkMenu *) gtk_menu_new();
        item1 = gtk_menu_item_new_with_label("Item 1");
        item2 = gtk_menu_item_new_with_label("Item 2");

        // set submenus and prepare widgets
        gtk_menu_append(menu, item1);
        gtk_menu_append(menu, item2);
	gtk_menu_item_set_submenu(GTK_MENU_ITEM(item2), 
GTK_WIDGET(submenu));
	gtk_menu_append(submenu, gtk_menu_item_new_with_label("First 
subitem"));
        callback(NULL, (gpointer) submenu);

        // connect signals
	gtk_signal_connect_object(GTK_OBJECT(item2), "activate", 
GTK_SIGNAL_FUNC(callback), (gpointer) submenu);
	gtk_signal_connect(GTK_OBJECT(menu), "selection-done", 
GTK_SIGNAL_FUNC(exitfunc), NULL);

        // display menu and activate the loop
        gtk_widget_show_all(GTK_WIDGET(menu));
        gtk_menu_popup(menu, NULL, NULL, NULL, NULL, 0, 0);
        gtk_main();

        return 0;
}


Output from the above program :-

Adding label item to submenu......adding done
Adding label item to submenu...
Gtk-CRITICAL **: file gtkmenushell.c: line 308 
(gtk_menu_shell_insert): assertion `GTK_IS_MENU_SHELL 
(menu_shell)' failed.
...adding done


Thanks,
Shantanu

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