Suggestions for collapsible group boxes?

[MrGarbage]

Hi,

I am looking for implementation suggestions on how to implement something
similar to the attached image.
I need a way to collapse down the individual 'groupbox' displays contained
in this form. This implementation was originally done in VB and the small
<< control will collapse or expand the groupbox.

I originally approached this as dockable windows, but I cannot be tied to
the qmainwindow area. This set of groupboxes appear on a stacked widget
page.

Any suggestions appreciated.
QT 4.3 on windows..

Mark