replace image of imagebutton at runtime?

[movinator]

Hi,

I'm working on some kind of tabbar without texts - ImageIcons only. Now I'd like to have each ImageIcon change its icon on selection/deselection. I don't know, how to programmatically change a property of member view, so I tried to change the definition of an Imagebutton so that it uses a bound property - which I then could change during clickhandlers ...

The problem is, that now there are no more images shown by the ImageButtons.

Do I need to trigger something like refresh on the ImageButtons, or am I totaly wrong?
Is there already a way to define an active and an inactive image?

Any hint is welcome!