On Wed, 2012-01-25 at 09:38 +0000, Derick Rethans wrote:
> On Tue, 24 Jan 2012, Tim Landscheidt wrote:
> 
> >   So my initial question would be: Has anyone already imple-
> > mented such a chart? :-)  Perhaps thought about an API?
> 
> I have not heard of that.

No, I don't know anyone who might have done that or thought about a
proper API for that. Given the nature of the existing data, it would
involve coming up with new:

- Datasets (representation of this (partially) tree-structured data)
- Renderer
- Chart (basically just an element container)

This would be some work, but you should be able to re-use large parts of
the existing charting framework.

> > If not, I would give it a try and use one of the other
> > chart types as a template.  Any suggestions which one might
> > be most suitable?

I guess starting with the line chart would be the best way to go.

Cheers,
Kore

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