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/
