Is it possible? I would like to draw an edge, lets say NBezierCurveShape, and right in the middle of the edge (distance between the two vertices) I would like to place an image.

Here is the scenario: I have a material flow going from "City A" to "City B" and the edges represent time by transportation mode. So I would draw an edge for time X going from A to B with a "Truck" image associated to the edge, and another edge for time Y also from A to B with a "Boat" image associated to the edge.

Thanks in advance.