How to edit graphs by graphviz?

Question

Is any one familiar with any c open source code that does graph manipulation (point and click) using the layout algorithms of graph viz? I would like to use the algorithms to lay out a graph which I could later manipulate in a GUI.

Answer 1

graphviz C code and architecture are rather sophisticated. You can take a look at canviz. It's Javascript rendering engine that you could port to C.

Some time ago I tried the qt way, following this post, but that wasn't an easy route.