Problems putting layouts inside groupbox

[zlatko]

There is parent layout and it is called mainLayout. I think problem is here:

actually its not main layout . Under main layout i mean form layout that will be parent for your layouts. But i also think that problem ist no here.

I receive warnigns that tells me that qgroupbox already has a layout. But what if I want to put some layout (with some objects in order inside it) inside a groupbox. Please help.

Listen your warnings
I think its the same if you add objects in group box without layout.
Play arround it.