Re: [gtkmm] adding and removing widgets to/from fixed container

[Enrico Costanza <ec142 york ac uk>]

Thanks for your reply.

Murray Cumming Comneon com wrote:

> > From: Anastasios Bassoukos [mailto:abas aix meng auth gr] 
> >    
> >
> > > The troubles arise when I try to add again something that I 
> > >      
> > had previously removed. In this case I get assertion fail and 
> > segmentation fault.
> >
> > That happens because Container::remove() unreferences the 
> > widgets. Nothing
> > else references them, therefore they are destroyed.
> >    
>
> This shouldn't be a problem unless you use Gtk::manage(). Actually, even if
> you use Gtk::manage() it shouldn't be a problem 
I use manage, but I use it from the Gtk::Window class, then add the 
widget to the Fixed container that is in the window as well.

> - but it would take a
> simple-as-possible test case to investigate it. People don't use Gtk::Fixed
> so it might be a rare problem with just that container.
>  
But fixed seems not to reimplement Container::remove, so I would expect 
the behaviour to be common for all containers.
I will try to make a simple-as-possible test case and submit it to 
bugzilla..

> > Use Glib::RefPtr<Gtk::Widget> to keep track of them....
> >    
> Glib::RefPtr<> is not really meant for Widgets.
>  
Shall I then use standard pointers?

Regards,
Enrico