Resizable overview 'rectangle'

In Demo1 sample, I can click on View->Overview and zoom or move to any part of the current view by dragging or moving a “rectangle”. If I want to select a larger portion of the view then I need to draw a new larger rectangle.
Is there a way to allow this overview rectangle to be resizable. I mean, just like for nodes, is there a way to show resize handles around the overview rectangle, so as to make this rectangle resizable.


The implementation of GoOverview and GoOverviewRectangle don’t support that functionality at the moment. I suppose you could implement that yourself, although it’s probably trickier than it might appear at first.
If you want to do this yourself, send me e-mail and maybe I can help.