[gtkmm] Destroying menu

["Andrew E. Makeev" <andrew solvo ru>]

Hi.

I would to introduce some feature that I've just discovered.
I guess, it should be mentioned somewhere in FAQs, either in ChangeLog, 
but I've missed it somehow (probably, not only me).

I am using menu bar with menu items that could contain submenus. The 
rule is I have to destroy it very careful, starting with last-last 
submenu in certain menu. Sample:

[tools                ]
 | add > |

My menubar class contains following members:

class MainMenu : public Gtk::MenuBar
{
   Gtk::Menu m_MenuTools; // this is
   Gtk::Menu m_MenuAdd;   // right

 public:
   MainMenu ()
   {
    ...
    m_MenuTools.items ().push_back (MenuElem ("Add", m_MenuAdd));
    ...
   }
   ~MainMenu ();
};

class MainMenu : public Gtk::MenuBar
{
   Gtk::Menu m_MenuAdd;    // this is
   Gtk::Menu m_MenuTools;  // wrong

 public:
   MainMenu ()
   {
    ...
    m_MenuTools.items ().push_back (MenuElem ("Add", m_MenuAdd));
    ...
   }
   ~MainMenu ();
};

In second case, m_MenuTools gonna be destroyed first, and it will 
automatically destroy it's children, so, when MainMenu D-TOR would 
attempt to destroy m_MenuAdd it will segfault.

Well, like I said I'd accept it as feature GTK, and just going to warn 
people be careful when handling menus in GTKMM.

Regards,
-andrew