Dialog design and maintaining square widgets.

[Gopala Krishna]

For the past two three days i am battling to get "perfect" settings dialog layout. Once it seems ok while other time i feel i should do something.
I now have two approaches to my dialog(attached) and i admit it isn't that good.

filldialog.ui was my first attempt (which i feel clumsy with lots of group boxes)
filldialog1.ui was approach taken from http://www.kdedevelopers.org/node/2475

I have two questions

• Which of the above is better ?
• How can i keep my preview widget always square ?
• Any suggestions to improve any of the dialogs ?

Thanks