Topological Eelation of Edge

When the edge is connected to the image, the topological structure of image will change. Now the system will call the method of Edge#connect() automatically. When the edge is removed from the image, the topological relation will be disconnected automatically.

• #connect() - connect to the image
• #disconnect() - disconnect topological relation
• #isConnected() - whether it is connected
• #getEdgeBundle() - acquire bundle edge collection

Example

var a = graph.createNode("A", -100, 0);
var b = graph.createNode("B", 100, 0);
graph.createEdge(a, b);
var edge = graph.createEdge(a, b);
alert(edge.getEdgeBundle().edges.length);

Operation result is: 2