Try asking this question on the gtk list [email protected]. It's more likely someone there would have the answer.
John Gerald Britton wrote: > I don't think that makes sense. For example, it does stop calling > iter_children at some point and display the tree. In my case, the > first time the tree is build, it makes two calls to iter_children and > then displays the tree and waits for something to happen (I still > think that two is one too many, but I can live with it). The next > time, it calls iter_children over 2000 times before it displays the > tree. > > That can't be right! > > So, the question remains, "When does the TreeModel stop calling > iter_children and display the tree?" > > It obviously does stop calling iter_children at some point, I can > show that. But, what are the circumstances? What is it looking for? > > On Mon, Jun 22, 2009 at 6:28 AM, Chris Camacho<[email protected]> wrote: > >> 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/
