complexe wizard with designer

[patcito]

but with qstackwidget, the user can change page as he wants. What if I want to oblige the user to go to a certain page depending on the option he choose on a page?

[jacek]

but with qstackwidget, the user can change page as he wants.

No, he can't. Qt Designer shows a bit different widget in the preview.

[jrideout]

I think the stack widget is the best way to go in your case, but when I want to embed a ui file in something I create a QWidget in designer. Then you can use that Qwidget inside a Qframe or similar container in some other ui form.