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 2999.10.1.0 release soon with this
feature.
Ivan Lazar Miljenovic
I'm pleased to announce a new version of my graphviz [1] library that provides bindings to the Graphviz [2] suite of tools for visualising graphs.
[1]: http://hackage.haskell.org/package/graphviz [2]: http://graphviz.org/
Changes in this release:
* I followed my own advice and put in bounds on the version of FGL it used...
* 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`, etc.).
- 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 Quick.
* The test-suite now allows running individual tests.
-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com
-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com