depinject graph visualization improvements

[kocubinski]

Problem Definition

As mentioned in #11910 we'd like the decisions made by depinject as to explicit and implicit interface binding to be noted in the generated graphviz.

A different visualization algorithm may also be required for non-trivial dependency graphs (e.g. SimApp) for the visualization to be useful.

Proposal

Add interface binding data to graphviz output. Re-evaluate visualization algorithm or possibly tool.

[aaronc]

Do you have any alternative visualization algorithms in mind?

[kocubinski]

Nothing specific right now. The Graphviz/dot implementation seems to be Sugiyama-style graph drawing.

[aaronc]

Do you notice any specific problems which you think could be solved by a better layout algorithm?

[kocubinski]

The amount of edge overlap, the length of rendered edges, size (width) of the graph makes it difficult to follow edges between nodes and at the same time read a node label.

[julienrbrt]

Closing this as won't do, as no other user has complained about it (are they even looking at the graph :D)