Resizing components at runtime

I am working on a mini access-like system using Vaadin. One feature I would like to implement is the resizing of components (text field, button, text area etc.) at runtime when a user develops screens using the system.

Is there a way to do it or some addon somebody knows of that I can start from?

The visual UI editor was made with vaadin.
Maybe you can take a look at the code to see how vaadin experts have done it.

Otherwise I can't think of any way which would not require lot of GWT editing.

Hey that's a good idea. I'll give that a try.

thank you Mathias.