Re: [gtkmm] Custom TreeStore Problems

[Silviu D Minut <minutsil cse msu edu>]

What's with the flood?


On Thu, 9 Oct 2003, Christof Petig wrote:

> 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 ...
>
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