Re: [gtkmm] Custom TreeStore Problems

[Christof Petig <christof petig-baender de>]

Murray Cumming Comneon com schrieb:
> > From: Christof Petig [mailto:christof petig-baender de] 
> > Reason:
> > Porting our apps from gtk1 to gtk2 came to a halt when I 
> > realized that 
> > out use of TreeStore is many times slower than our custom Tree-like 
> > class which I mapped to a CList (with reasonably well performance).
>
>
> There is quite a bit of discussion about TreeView performance on the
> gtk-list and I think you have found some. I would investigate
> - freezing/thawing the View while inserting large amounts of data.

temporarily set_model(Glib::RefPtr<Gtk::TreeModel>()) made it 2 seconds 
faster (out of 20). This is not the real problem.

> - Not sorting while adding data.

I never touched sorting ... I don't think I have to explicitely disable it.

> - Rumored speed TreeView improvements in GTK+ 2.4.

Difficult to tell (I listen gtk-devel closely) without gtkmm-2.4 
available and 2.4 still changing API wise.

I'd really like to roll my own TreeStore for now. But

MyTreeModel()
     : Glib::ObjectBase(typeid(MyTreeModel)), Gtk::TreeModel()
{ ...}

didn't help me. Are there any more gotchas left?

(owntreemodel:10416): glibmm-CRITICAL **: file interface.cc: line 53 
(Glib::Interface::Interface(const Glib::Interface_Class&)): assertion 
`gobject_ != 0' failed

(owntreemodel:10416): GLib-GObject-CRITICAL **: file gobject.c: line 
1337 (g_object_unref): assertion `G_IS_OBJECT (object)' failed

Yours
    Christof

PS: I'll happily donate the ~150 line example to gtkmm/examples - once 
it works ...