Locking an edge to a vertex in mxGraph

Question

Given the javascript Hello World example (mxgraph/javascript/examples/helloworld.html): If you click and drag the edge, it will move so that it is not connected to the vertices anymore. I want to modify helloworld.html, so that the edge cannot be decoupled from the vertices. How can I achieve this?

Answer 1

Place the following code before the try-finally block:

graph.setAllowDanglingEdges(false);
graph.setDisconnectOnMove(false);

This is explained in the documentation.