Not sure if the project is alive, but still
When using findGraphicElementAt for edges it can not find any.
I looked into DefaultCamera2D.class and the body of edgeContains method almost the same as nodeContains and only checks for a little region in the center of an edge
I've got the same problem and thus implement a new MouseManager where I copied the original code and adjusted it so that edges are found not only by their center. I explain this here
Not sure if the project is alive, but still When using findGraphicElementAt for edges it can not find any. I looked into DefaultCamera2D.class and the body of edgeContains method almost the same as nodeContains and only checks for a little region in the center of an edge