[Gambas-user] Big Gambas3 slowdown on hex edit / compare program

[Caveat]

But tableview doesn't appear to be editable either... there's no
read-only attribute, no editable attribute... so ?

On Wed, 2011-12-14 at 18:06 +0100, Fabien Bodard wrote:
> 2011/12/14 Caveat <Gambas at ...1950...>:
> > 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!).
> 
> Use tableview instead of gridview !!!
> 
> 
> >
> > 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...!
> >
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> 
>