Animated buttons at bottom of kickoff

[M. Mehdi Salem Naraghi]

Hi everybody,

a few days ago I suggested a sort of animation for the kickoff  tab list 
which is placed at the bottom of the applet. I modified the tabbar.h and 
tabbar.cpp in a way that switching the tab is animated now. I had to 
make many changes and probably introduced some bugs and the code got a 
little messy but I'll take care of that in the weekend.  I would like to 
get some feedback on this. What do you think about the animation? Do you 
have any suggestions and is it possible to include my changes into kickoff?
Here is a screencast I made a few minutes ago:
http://informatik.uni-bremen.de/~momesana/tabbar.ogv
The header and implementation file can be found here:
http://informatik.uni-bremen.de/~momesana/tabbar.h
http://informatik.uni-bremen.de/~momesana/tabbar.cpp

Thanx in advance
momesana