implementing a container??

[Jim Crafton <jim crafton verizon net>]

I am using gtk in my framework for it's linux port.
In the framework that I have written I already have code that does 
repositioning of child controls based on alignment and or anchors.
So my question is, what is the best approach for using GtkWidgets and 
positioning them with absolute coordinates (with the alignment/layout 
being taken care of by my framework)? I have experimented with the fixed 
container, and this seems very similar to what I want, but I am a bit 
confused as to how best to use it.
For example
if i want to move a child control (that has been added to the fixed 
container) what is the "correct" way to do it?
I can use the gtk_fixed_move for x and y coordinates and then use 
gtk_widget_set_size_request() to set the width and height.
But is there a better way? Should I make a special container class to 
handle this(I notice that this appears to have been what wxWindows did 
for their port)?

Thanks

Jim