How to display a widget on top of other widgets in the same window

[herculis]

How to display a widget on top of other widgets in the same window and do this switching such that the user will not know that its switching.

[dheerendra]

This is not possible. At least there will be some indication for the user.

[DBoosalis]

Isn't this what QStackedWidget and QStackedLayout are all about ?

[dheerendra]

Yes, I have already suggested the same to him. He does not want use it.