New class KWidgetBlendAnimation

[Matthias Kretz]

Hi,

while playing with possible UI effects I think I found a rather useful one: 
Fade UI changes.

I think it is useful because sometimes the UI changes are too fast for the 
user to notice that clicking on something at one point changes a widget 
somewhere else. If the widget "somewhere else" uses a fade animation of 250ms 
the change suddenly becomes a lot more noticable.

My suggestion for uses of this class therefore is not just eye-candy but more 
importantly to emphasize: Hey, your click changed something here!

The class is attached. Please comment on the naming, usefulness, dox and 
whether we want to have it in kdeui for 4.1. (I want to use it in my Phonon 
KCM unless I can be convinced that there's a better UI hint than this 
animation).

-- 
________________________________________________________
Matthias Kretz (Germany)                            <><
http://Vir.homelinux.org/
MatthiasKretz at gmx.net, kretz at kde.org,
Matthias.Kretz at urz.uni-heidelberg.de
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