QWidget inside QGroupbox semi transparent [Qt 4.3.1]

[desch]

the best is to set all children of Qgroupbox Semi transparent;

but more I search , more I understand I have to subclass all children I would like to insert into the QGroupbox

[wysota]

It might be easier to use QWidget::render() to get a pixmap of the item and its children and then render the result with opacity of your choice on the destination window.

[drsm]

It might be easier to use QWidget::render() to get a pixmap of the item and its children and then render the result with opacity of your choice on the destination window.

do you have any ideas how to do this?
the rendering is not a problem,
but how to render results??