The generic function graph-pane-update-moved-objects
is called after some objects in the graph
graph-pane
were moved by a user gesture.
objects is a list containing the objects that were moved.
The primary method updates the geometry of edges connected to the moved objects. You can add non-primary methods to perform other operations at that point.
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017