Thanks Benoit, that was the missing piece of the puzzle! Now the program is working great!
I kind of thought 8000+ textboxes was a little overkill, but I didn't expect it to be quite so slow... Thanks again Caveat On Wed, 2011-12-14 at 19:29 +0100, Benoît Minisini wrote: > Le 14/12/2011 15:59, Caveat a écrit : > > Hi, > > > > I have a program that compares small binary files (either 1k or 4k so > > really quite small files!). > > > > The program builds the GUI based on whether the user has chosen to view > > the data from a Mifare 1k card or a Mifare 4k card. > > > > Problem is that when building the view for the 4k card, the program > > slows down to a crawl. There are 8192 textboxes built in 2 columns of > > 64 panels (64 textboxes per panel), with a bold label against each panel > > indicating the sector number on the card. This arrangement represents > > the sectors on a Mifare 4k card. The side by side column view makes for > > a very nice, quick visual check on where the cards differ. > > > > The slowdown doesn't appear to be linear, that is the more items there > > are to add (or have been added), the slower and slower it gets. I get > > the impression Gambas may be frantically shuffling things around on the > > form, and finding more and more things to shuffle, so taking longer and > > longer as each item is added. To see the slowdown for yourself, just > > try selecting Mifare 4k in the dropdown under Mifare Card Type, you > > don't need to load any files or run Compare... > > > > I have tried replacing the whole panel/textbox/scrollview thing with a > > GridView and it works, a LOT faster, but then you have no possibility to > > edit the data (coming in a later version of the program!). > > > > If anyone can take a look and suggest some improvements, I'd be more > > than happy! > > > > Kind regards, > > Caveat > > P.S. Project is attached, it is a work in progress...! > > > > I guess the slowdown comes from Qt or GTK+, as I usually don't use any > O(n) algorithms in my code. > > But using 8192 textboxes is a stupid thing, as GUI are very heavy, in > any toolkit. So just use a TableView as Fabien said. TableView is an > editable GridView. > > When the user click on a cell, tell the TableView to edit the data with > the Edit() method. Then the "Save" event will be raised to ask you to > save the data. You have to maintain the TableView contents yourself > (through the Data event), as the TableView just displays and edits it. > > Regards, > ------------------------------------------------------------------------------ Cloud Computing - Latest Buzzword or a Glimpse of the Future? This paper surveys cloud computing today: What are the benefits? Why are businesses embracing it? What are its payoffs and pitfalls? http://www.accelacomm.com/jaw/sdnl/114/51425149/ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
