[Qt-interest] future of a desktop UI

[Sylvain Pointeau]

Hi Kai,
I use the same model for a QTableView and a QListView.
The QTableView is very fast (immediate)
the QListView is never ending.

do you think this is my model?

Cheers,
Sylvain


On Thu, Aug 27, 2009 at 8:27 AM, Kai Koehne <kai.koehne at nokia.com> wrote:

> ext Sylvain Pointeau wrote:
> > Yes I saw the blogs on declarativeUI but I didn't look at the sample
> > sources.
> > It is definitely something I want to look.
> >
> > As I largely need a list of a large number of items, I was comparing
> > yesterday a html table and a list / table QListView and QTableView for
> > 35'000 items.
> >
> > I wrote an email to the mailing list, because I don't understand why the
> > list is slow as impossible to use, and the table is fast but slow to
> > scroll depending if we are at the beginning or at the bottom of the
> > list. Do you have an idea why?
>
> Showing a list with 35.000 items at once sounds like a GUI inferno to me ;)
> But anyway, QListView & QTableView are actually pretty optimized for larger
> sets ...
>
> AFAIK setting uniform row height should help speed up rendering:
>
> http://doc.trolltech.com/4.5/qtreeview.html#uniformRowHeights-prop
>
> But the bottleneck could also be somewhere in your model ...
>
> > other thing is that a browser opens an html table (35'000 rows)
> > immediately, but Qt webkit opens it in 6 secondes (Arora is the same).
> > Please do you have some insights why it could be slow with Qt webkit?
>
> I haven't done much yet with with the webkit integration, so I cannot
> comment on this.
>
> Regards
>
>
> Kai
>
>
> --
> Kai Koehne
> Software Engineer
> Nokia, Qt Development Frameworks
>
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