Thanks!
This is what I meant, but this control is useless for me.
But I found a way to create this in GIMP.
I made a circle and cutted it to a controller. Now I could select small
parts of it and set all black colors to red( with
scriptfu->colors->color convert ).
It was a lot of work, but worthy!
so this is what I use right now:
http://www.krampenschiesser.de/screenshots/ksdrumgui.jpg
Christian