[xdot] highlight node's connected records on mouse over

[GoogleCodeExporter]

Let's have a graph:
{
A -> B,
A -> C,
B -> C,
B -> D
}

So it would be nice of Xdot to highlight B and C if I put my mouse over A;
highlight B if I put my mouse over D, and so on.
Of course, with the edges and edges' labels.

This would help understanding complex graphs with a lot of non-straight and
overlapping edges.

Thank you beforehand.

Original issue reported on code.google.com by Alexey.K...@gmail.com on 12 Nov 2008 at 1:28