[Haskell-cafe] Re: ANNOUCE: graphviz-29220.127.116.11
Ivan Lazar Miljenovic
ivan.miljenovic at gmail.com
Mon Jul 12 03:28:09 EDT 2010
Something I forgot to mention (yes, I forgot to mention something here
as well as for the fgl announcement):
I sent out an email during the week asking people what they'd prefer in
terms of semantics as a pure Haskell implementation for "dot -Tcanon".
I didn't end up getting around to implementing this yet (as I wanted to
get all these packages out first and I'm still reverse-engineering all
the corner cases dealing with what happens to nodes in a cluster that
has the same name as another cluster), but the infrastructure for doing
so is all there so there may be a 2918.104.22.168 release soon with this
Ivan Lazar Miljenovic <ivan.miljenovic at gmail.com> writes:
> I'm pleased to announce a new version of my graphviz  library that
> provides bindings to the Graphviz  suite of tools for visualising
> : http://hackage.haskell.org/package/graphviz
> : http://graphviz.org/
> Changes in this release:
> * I followed my own advice and put in bounds on the version of FGL it
> * Conversion of FGL-style graphs to `DotRepr` values is now achieved
> using the new `GraphvizParams` configuration type. This allows us
> to define a single parameter that stores all the conversion
> functions to pass around rather than having to pass around several
> functions. This also allows all the non-clustered and clustered
> functions to be collapsed together, whereas what used to be handled
> by the primed functions is now achieved by using the
> `setDirectedness` function.
> There are three default `GraphvizParams` available:
> - `defaultParams` provides some sensible defaults (no attributes
> or clustering).
> - `nonClusteredParams` is an alias of `defaultParams` where the
> clustering type is explicitly set to be `()` for cases where you
> don't want any clustering at all (whereas `defaultParams` allows
> you to set your own clustering functions).
> - `blankParams` sets all fields to be `undefined`; this is useful
> for situations where you have functions that will set some
> values for you and there is no sensible default you can use
> (mainly for the clustering function).
> * Expansion of the `DotRepr` class:
> - More common functions are now defined as methods (`getID`,
> - The ability to get more information about the structure of the
> `DotRepr` graph, as well as where all the `DotNode`s are, etc.
> - `graphNodes` now returns `DotNode`s defined only as part of
> `DotEdge`s, and will also merge duplicate `DotNode`s together.
> - `graphNodes` and `graphEdges` also return `GlobalAttributes`
> that apply to them.
> * The `Point` type now only has one constructor: `Point Double
> Double`. The `Int`-only constructor was present due to historical
> purposes and I thought that the `Pos` value for a `DotNode` would
> always be a pair of `Int`s; this turns out not to be the case (and
> accounted for some bugs in older versions of my SourceGraph tool; it's
> taken me this long to remember to fix this...).
> * `SortV` and `PrismOverlap` now only take `Word16` values rather than
> `Int`s, as they're not meant to allow negative values (the choice of
> using `Word16` rather than `Word` was arbitrary, and because it's
> unlikely those values will be large enough to require the larger
> values available in `Word`).
> * `NodeCluster` has been generalised to not have to take an `LNode`
> for the node type; the type alias `LNodeCluster` is available if you
> still want this.
> * Several documentation typos fixed, including one spotted by Kevin
> * The test-suite now allows running individual tests.
> Ivan Lazar Miljenovic
> Ivan.Miljenovic at gmail.com
Ivan Lazar Miljenovic
Ivan.Miljenovic at gmail.com
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