Yes and no. Out of the box: no. HOWEVER, if you add 1000 items into the root, it's only making
5 + 3 + 3 (5 visible, 3 invisible above and below - basically: Visible + (50% of visible above) + (50% of visible below)) actual cells, the rest is just managed objects, so fairly small. I've loaded 3500 elements into a list without any problem (make sure you load it OFF the main thread, and if you use Sqlite-net, dont use linq - use a SQL statement!) The YES part: you can work out where the scroll is, and dynamically load things when you get near the bottom. This doesn't work out of the box - you would need to work out which cells are visible, and if it's close enough to the end, load some more at the bottom. The other option is the "LoadMoreElement". This is in the "OldElements" folder, so it might need some work, but this allows you to put a cell in, the user taps it, and you can do whatever - load X more is the usual case. https://github.com/migueldeicaza/MonoTouch.Dialog/blob/master/MonoTouch.Dialog/OldElements/LoadMoreElement.cs You could do the same tho - put a cell at the bottom, and if it's loaded (GetCell is called), then do the load in a background thread and insert the new cells above the "bottom" loader cell. Lots of ways :) N On Tue, Sep 4, 2012 at 8:32 PM, Guido Van Hoecke <[email protected]> wrote: > Hi Nic, > > Thanks for your answer. > > I should have phrased my question more precisely. Is it possible to not > instantiate all Elements and add them to the RootElement before the view > does appear, but rather create them as needed within a kind of > GetElement method? > > Guido > > On 4 September 2012 13:08, Nic Wise <[email protected]> wrote: >> Absolutely :) >> >> The default ones already do this >> >> https://github.com/migueldeicaza/MonoTouch.Dialog/blob/master/MonoTouch.Dialog/Elements.cs#L271 >> >> (and it's in other places too) >> >> IF you have made your own element, you are responsible for doing it, >> but you can, easily, do it. >> >> I suggest you split your GetCell into 2 parts: >> >> https://gist.github.com/3620212 >> >> If you set colors, dont forget to reset it for each one - otherwise >> you end up with red bits where you want green etc :) >> >> >> >> >> On Tue, Sep 4, 2012 at 11:53 AM, Guido Van Hoecke <[email protected]> wrote: >>> Hi, >>> >>> My app happily uses the Monotouch.Dialog framework. >>> >>> Some of its dialogs list values from a database. Basically my approach >>> is to create a new DialogViewController and wait for the >>> ViewWillAppear event. >>> >>> The corresponding event handler creates a new RootElement and fully >>> populates it with an Element for each of the retrieved database rows. >>> >>> I realise that this would e.g. build 1k cells for 1k rows, so I >>> probably should dequeue reusable cells and only build the Elements as >>> requested by the GetCell method. >>> >>> Is this possible within the MT.D framework using RootElement, Section >>> and Element objects? >>> >>> Thanks in advance >>> >>> Guido >>> >>> -- >>> It is the nature of extreme self-lovers, as they will >>> set a house on fire, and it were but to roast their eggs. >>> -- Francis Bacon >>> >>> http://vanhoecke.org ... and go2 places! >>> _______________________________________________ >>> MonoTouch mailing list >>> [email protected] >>> http://lists.ximian.com/mailman/listinfo/monotouch >> >> >> >> -- >> Nic Wise >> t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise >> b. http://www.fastchicken.co.nz/ >> >> mobileAgent (for FreeAgent): get your accounts in your pocket. >> http://goo.gl/IuBU >> Trip Wallet: Keep track of your budget on the go: http://goo.gl/ePhKa >> Earnest: Self-employed? Track your business expenses and income. >> http://earnestapp.com >> Nearest Bus: find when the next bus is coming to your stop. >> http://goo.gl/Vcz1p >> London Bike App: Find the nearest Boris Bike, and get riding! >> http://goo.gl/Icp2 -- Nic Wise t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise b. http://www.fastchicken.co.nz/ mobileAgent (for FreeAgent): get your accounts in your pocket. http://goo.gl/IuBU Trip Wallet: Keep track of your budget on the go: http://goo.gl/ePhKa Earnest: Self-employed? Track your business expenses and income. http://earnestapp.com Nearest Bus: find when the next bus is coming to your stop. http://goo.gl/Vcz1p London Bike App: Find the nearest Boris Bike, and get riding! http://goo.gl/Icp2 _______________________________________________ MonoTouch mailing list [email protected] http://lists.ximian.com/mailman/listinfo/monotouch
