Edge Element
Edge element (Q.Edge) is the graph element connecting two nodes, showing the topological relation among points. It represents transmission pipe, routines or relation of things in actual application.
Create edge
Generally the following codes would be used for creating edges
var edge = graph.createEdge(from, to, “edge name”);
The edge constructor may also be adopted
var edge = new Q.Edge(from, to);
edge.name = “edge name”;
graph.graphModel.add(edge);