Maybe you can solve this for me once and for all, and we can conclude if it is lack of knowledge or a syntactical error on my part, or a bug/flaw in either the QUiLoader or the Designer :-)

My form is a QMainWindow, placed top-most in it I have a QGridLayout containing a few widgets, and I need a pointer to this grid layout. The following things are not working:

(The form and other code is correct, because it will create, display and function properly when I obtain the pointer using previously pasted code)

Qt Code: 
  1. pointer = qobject_cast<QGridLayout*>( (qobject_cast<QLabel*>( topmost_label_inside_layout->parent() ))->layout() );
  2. pointer = qobject_cast<QGridLayout*>( central_widget->layout() );
  3. pointer = qobject_cast<QGridLayout*>( main_window->layout() ); // long shot
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Putting my grid layout inside an additional dummy widget to solve this is not an acceptable overhead, sorry to say :S