Re: [gtkmm] Custom TreeStore Problems

[Bryan Forbes <mxpxfifws yahoo com>]

Please stop sending the same mail over and over.  We got it already!

-Bryan


--- Christof Petig <christof petig-baender de> 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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