RE: [gtkmm] Newbie questions about changing menus and RefPtr

[Murray Cumming Comneon com]

> From: Pierre Mazoyer [mailto:pmazoy free fr] 
> I would like to replace a menu item by another one.

Of course that is generally considering poor UI design. It's probably best
to have 2 menu items, one of which is disabled. It certainly looks like that
in this case.

> To achieve this result, I thought deleting the menu item and 
> then create the 
> new one at the same place.
> But I have some problems with the delete task.
> 
> I found two ways to do it:
> 
> (My menu is menu_Game, it contains "New Game Ctrl+N", a 
> separator, "Quit 
> Ctrl+Q"; I want to change "New Game Ctrl+N" to "Stop Game", 
> with a new handler)
> 
> Gtk::Menu_Helpers::MenuList::type_base::iterator i =

You  shouldn't need the type_base there. In fact,
Gtk::Menu::MenuList::iterator should work too.
 
> menu_Game.items().begin();
> i = menu_Game.items().erase(i);
> menu_Game.items().insert(i, 
> Gtk::Menu_Helpers::MenuElem("_Stop Game", SigC::slot
> (*this, &GameWindow::stopGame)));
> 
> OR
> 
> menu_Game.items().remove(menu_Game.items()[0]);
> menu_Game.items().push_front(Gtk::Menu_Helpers::MenuElem("_Sto
> p Game", 
> SigC::slot(*this, &GameWindow::stopGame)));
> 
> (The first way seems better to me because it could work even 
> if the item was in 
> the middle of the menu)
> 
> In both cases, the menu is changed and I can select the new 
> item (Stop Game) 
> but if I press Ctrl+N, I can still execute the previous one 
> (New Game)!

That sounds like a bug. I think you should add a bugzilla bug. Bugs are
dealt with more quickly if you _attach_ a simple-as-possible test case in
bugzilla too.

> I have a quick question about RefPtr

Please do keep it to one question per email thread.

> which is unrelated with 
> the previous one.
> If I create a RefPtr, assign an gtkmm object to it and then 
> reassign another 
> object, will the first object be deleted?

RefPtr doesn't delete anything. It just unreferences things. GTK+ might
delete it if that was the last reference.
 
> I am a newbie with gtkmm, sorry in advance if my questions 
> sound silly to you.

Not at all.

Murray Cumming
murrayc usa net
www.murrayc.com