The function graph-pane-object-at-position
returns the graph-object (either a graph-edge or a graph-node) at the coordinates
x
,
y
in the graph
graph-pane.
If there is no graph-object at position
x
,
y
then graph-pane-object-at-position
returns nil
.
CAPI User Guide and Reference Manual (Unix version) - 3 Aug 2017