Dragging window only from its title

Hi,

Is it possible to drag a SystemWindow/StandardWindow ONLY from its
title, on the top?

Currently, the behaviour is: any area of the windows where there is no
widget behaves as a select&drag point of the whole window.

For some young -- and older -- users of Dr.Geo it can be confusing.

I look at it but did not find obvious way to do it but hacking
#aboutToBeGrabbed: method.

Did I miss something?

Thanks

Hilaire

--
Dr. Geo
http://drgeo.eu