Creating a DrawingArea scroll-capable

[Stefano Salvi <stefano salvi mn it>]

I'm writing a sort of hex editor.
Ithought to use a drawing area for the display.
As the area can scroll, I thought not to build a great drawing area an 
scrolling it througg a ScrolledWindow, but to build a Drawing Area 
derivative, implementing the on_set_scroll_adjustments callback and 
getting the events from the adjustments to scroll the content.

I  browsed for a while in the documentation and the sources, but didn't 
find any clear way to create such an object.
Obviously I don't have a corresponding gtk++ underlying object to wrap.

Thank you
	Stefano Salvi