[Qt-interest] two-dimensional splitter?

[Mitchell L Model]

Does anyone know a way (or code I could download) to create a two- 
dimensional splitter? I.e.:

						|
			[widget1]	|	[widget2]
			__________+________
			[widget3]	|	[widget4]
						|

where I could move the vertical bar to change the proportion of the  
horizontal space allocated to the widgets on the left and widgets on  
the right and the horizontal bar to change the proportion of the  
vertical space allocated to the widgets on the top and widgets on the  
bottom? All I can think of is a regular splitter in one dimension and  
a line in the other, and implement splitter functionality activated by  
the line being moved.