[pygtk] gtk.TreeModel.iter_children() method, how often should it be called?

[Chris Camacho]

As far as I could tell that's just the way it works *if* you could
suspend the calls to iter_children it would stop working...

--- On Sat, 20/6/09, Gerald Britton <gerald.britton at gmail.com> wrote:

> From: Gerald Britton <gerald.britton at gmail.com>
> Subject: Re: [pygtk] gtk.TreeModel.iter_children() method, how often should it  be called?
> To: "Chris Camacho" <chris_camacho at yahoo.com>
> Cc: pygtk at daa.com.au
> Date: Saturday, 20 June, 2009, 11:11 PM
> I hear you, but I still need a direct
> answer to the question, "What
> makes the TreeModel stop calling iter_children?  I
> can't find a clear
> explanation and I can't figure it out by looking at the
> calls that
> come into my method either.
> 
> On Thu, Jun 18, 2009 at 11:18 AM, Chris Camacho<chris_camacho at yahoo.com>
> wrote:
> >
> > jeeze not being able to just reply is a pain
> anyhow....
> >
> > I looked into using treemodels connecting to
> databases
> >
> > from what I could tell it seems to initially iterate
> all items
> > and either copies them or creates meta data about the
> items
> > (I didnt look into the implementation)
> > Depending on how things were added it would also seem
> to iterate the whole
> > set again!
> > I think the standard treemodel is ok for small numbers
> (sub 200)
> > but I had to end up paging 1,000's of items 100 at a
> time
> > (interestingly this is what the gnome db widgets
> do...)
> >
> > I've been tempted to weld together my own data grid
> with a viewport
> > and moving entry widgets but this would at a guess
> need C and I haven't
> > had the time to look into it
> >
> >
> > --- On Thu, 18/6/09, Gerald Britton <gerald.britton at gmail.com>
> wrote:
> >
> >> From: Gerald Britton <gerald.britton at gmail.com>
> >> Subject: [pygtk] gtk.TreeModel.iter_children()
> method, how often should it be called?
> >> To: pygtk at daa.com.au
> >> Date: Thursday, 18 June, 2009, 2:50 PM
> >> Hi -- I think I have a problem but
> >> I'm not sure since I'm relatively
> >> new to the TreeModel and how it works.  Here's
> the
> >> scenario:
> >>
> >> I use TreeModel to display rows of data from a
> >> database.  Upon
> >> startup, the TreeModel is built and I notice two
> calls to
> >> the
> >> gtk.TreeModel.iter_children() method.  Later, I
> change
> >> some data in
> >> one of the rows.  The next time the TreeModel is
> >> built,
> >> gtk.TreeModel.iter_children() is called thousands
> of times
> >> before the
> >> display is refreshed. Oh, the database has less
> than 50
> >> rows of data
> >> in it!
> >>
> >> So, two questions:
> >>
> >> 1. Is this normal (I hope not!) behavior?
> >>
> >> 2. What tells the TreeModel to stop calling
> >> gtk.TreeModel.iter_children()?  How does the TM
> know
> >> that it has done
> >> everything it needs to do?
> >>
> >> --
> >> Gerald Britton
> >> _______________________________________________
> >> pygtk mailing list   pygtk at daa.com.au
> >> http://www.daa.com.au/mailman/listinfo/pygtk
> >> Read the PyGTK FAQ: http://faq.pygtk.org/
> >>
> >
> >
> >
> >
> 
> 
> 
> -- 
> Gerald Britton
>