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 <[email protected]> wrote: > From: Gerald Britton <[email protected]> > Subject: Re: [pygtk] gtk.TreeModel.iter_children() method, how often should > it be called? > To: "Chris Camacho" <[email protected]> > Cc: [email protected] > 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<[email protected]> > 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 <[email protected]> > wrote: > > > >> From: Gerald Britton <[email protected]> > >> Subject: [pygtk] gtk.TreeModel.iter_children() > method, how often should it be called? > >> To: [email protected] > >> 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 [email protected] > >> http://www.daa.com.au/mailman/listinfo/pygtk > >> Read the PyGTK FAQ: http://faq.pygtk.org/ > >> > > > > > > > > > > > > -- > Gerald Britton > _______________________________________________ pygtk mailing list [email protected] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://faq.pygtk.org/
