[Panel-devel] KDE/kdebase/workspace/plasma/applets/tasks

[Aaron J. Seigo]

On Sunday 16 December 2007, Jason Stubbs wrote:
> On Monday 17 December 2007 04:33:56 Aaron J. Seigo wrote:
> > On Saturday 15 December 2007, Jason Stubbs wrote:
> > > SVN commit 748739 by jstubbs:
> > >
> > > Now that the super-long animation issue has been fixed, up the
> > > animation time on tasks so that it's actually noticable. ;)
> >
> > animations don't need to be noticeable to be useful. 1000ms is far too
> > long for an animation. it should be a quarter second at the most perhaps,
> > but the point of animation is not to dazzle the user and make them watch
> > the screen, but to provide non-jarring transitions between states.
>
> I had kDebug() going on repaints and there was only 2 or 3 frames shown and
> visibly it was very jerky.

kDebug() is not a great way to count these things due to the latency it itself 
creates.

> On older Windows, the minimum interval for a 
> timer interval is 50ms so QTimeLine is probably using that interval for its
> signals.

no, it's 40ms (25fps). you can also set it lower. in fact, this code should 
not be using QTimeLine at all. it should be using Phase. that can, of course, 
be done post 4.0, but it does need to get done at some point.

> So a quarter of a second = 250ms = 5 frames should be about right. 

yes, should be good enough. remember, of course, that this is a best case 
scenario, if there are other things happening that tie up the gui tread more 
than 50ms frames will be skipped. not a big deal of course =)

-- 
Aaron J. Seigo
humru othro a kohnu se
GPG Fingerprint: 8B8B 2209 0C6F 7C47 B1EA  EE75 D6B7 2EB1 A7F1 DB43

KDE core developer sponsored by Trolltech
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://mail.kde.org/pipermail/panel-devel/attachments/20071216/de7c3787/attachment-0001.pgp