add config/class options to colorize depgraph for custom workflow

[Jay]

not sure what would be needed to do this, or even if it would actually be in the depgraph plugin, to either allow .ini defines of state-to-color mappings for the graph, or to reuse any custom classes defined for the roadmap view.

If this is in the wrong plugin bucket, I apologize.

[Russ Brown]

Automatically picking up the roadmap colours would be fantastic: we spent quite a while tuning our milestone colours and it really helps. Currently the depgraph isn't anywhere near as useful as it could be as we don't get to see tickets that are in progress: reusing the milestone colour would I think be a very elegant solution.

[Luke Cyca]

I have this working, but have had to hardcode the colors right into the plugin code. I suppose I could easily expose it as a parameter in trac.ini, however, it would be in this plugin's namespace, like:

[mastertickets]
depgraph_color.new = CD5C5C
depgraph_color.accepted = FFD700
depgraph_color.in_progress = 5960A8
depgraph_color.closed = 7FBA00
depgraph_color.unknown = 999999

The colors for the roadmap are defined in a CSS file somewhere, and I don't think it would be feasible to capture them from there to feed to dot.

Thoughts?