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List:       gtkmm
Subject:    RE: Deriving from Gtk::ListStore
From:       "Murray Cumming" <murrayc () murrayc ! com>
Date:       2004-11-26 9:57:10
Message-ID: 34641.217.10.50.85.1101463030.spork () webmail ! murrayc ! com
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> Sorry mate,
>
> I was asking why it was that the 'create' mechanism you use is needed -
> out
> of interest,

Because classes that are used via RefPtr<> should never be used without
RefPtr<>, because they must be reference-counted, because their memory
management depends on this. By making the constructor protected, we
prevent you from ever getting, for instance, a bare Gtk::TreeModel*. So,
because you have no constructor, you need some other way to instantiate a
TreeModel. The API forces you to do the right thing.

Murray Cumming
murrayc@murrayc.com
www.murrayc.com
www.openismus.com
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