Visual editor plugin

I am wanting to create a visual editor for the serious game scenario engine I have written using C2.

Before spending lots of time on this, I was wondering if anyone had created a C2 plugin calling upon an API such as http://jointjs.com/ or

another similar solution?

My goal is to create a C2 application in which you can add graphic boxes with various properties, click and drag them

around, delete them. The end result created by the app's users would look something like this: https://www.dropbox.com/s/5wotrr262br36bs/Dataflow_Designer.png?dl=0

Thanks for any further insights.