From kde-core-devel  Tue Nov 18 14:23:04 2008
From: Rafael =?iso-8859-15?q?Fern=E1ndez_L=F3pez?= <ereslibre () kde ! org>
Date: Tue, 18 Nov 2008 14:23:04 +0000
To: kde-core-devel
Subject: Re: Code transitions - Theme transitions
Message-Id: <200811181523.04360.ereslibre () kde ! org>
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Hi Matthias and all,

> Just my thought on this topic:
> I agree that visual effects are part of the look. But they are also a mea=
ns
> of increasing visual feedback to the user on an action taken by the user.
> The added eye-candy is only part of the outcome, the more important part,
> to me at least, is that the user gets a clearer indication of what happen=
ed
> after he clicked somewhere.

Yes, I agree with you. However this have to be a work of the style itself=20
(fully, not even partially).

I have had some short talks with Gof and he told me several times that they=
=20
were thinking how to implement animations internally in QStyle.

=46or this reason, my position is that we should remove all this kind of ef=
fects=20
(forced by something under the style), since it could collision with the=20
effect the style is going to try.

If a style developer develops a "extremely simple" (yeah, he called it that=
=20
way "EXTREMELY SIMPLE") style, which will avoid _all_ kind of animations, I=
=20
think we _should_ respect the users who use this style.

=46or this reason I conclude that maybe what we have to do is to let this=20
decision fully to the style developer.

> If you manage to make application requested visual effects "themeable" by
> the style that might be the solution to both aspects of visual FX.

Yes, bespin has this. On its configuration dialog for instance you can sele=
ct=20
which kind of animations you want when "switching tabs". However this is al=
so=20
automatically applied when switching pages on a paged dialog, and in genera=
l=20
in a stacked layout context. I think this is nice.

However we introduced a mechanism on kdelibs for 4.2 on KGlobalSettings whi=
ch=20
should be asked by the styles that link to KDE. It will tell the style the=
=20
preference the user has on animations and special features (like gradients).

Its name is KGlobalSettings::graphicEffectsLevel(). If the style developer=
=20
asks to this method (which its content will be set by the user hopefully [I=
f I=20
make it for 4.2 on the style kcm] in 4.2) and acts in consequence we can ha=
ve=20
a real polite style that will obey the user main preferences.


Regards,
Rafael Fern=E1ndez L=F3pez.

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