I see how the resize items work.

Now lets say i wanted the resizers to be the full-length of the rect I am adjusting.
Something like:

extraction.png

I am trying to create an extraction item for a qgraphicsview that is showing some freq/time pixmaps. The cyan in the picture is where the mouse has entered the resizer edge. Both sides hilite because they would move in unison around the center line (adjusting bandwidth). The top and bottom would be adjusted individually for time.

Once I start resizing the edge items to match the center rect, that is where my problem starts . . . because I am not sure how to exactly go about doing that. Do I get the transformation from parent? Maybe I am just complicating the problem in trying to produce this version of an extraction window that a client has requested.