[Haskell-cafe] ANNOUNCE: graphviz-2999.13.0.0

Ras Far rasfar at gmail.com
Thu Apr 19 19:21:30 CEST 2012

Hello Ivan,

Thanks for bringing Graphviz to Haskell, and for your continuing
dedication to making it more complete!

I just tried Graphvis for the first time a few days ago.  I regretted
the absence of example code, especially as the API has been evolving,
so that examples on the Web do not generally work without change.

I see that the inclusion of QuickStart-style documentation is on your
short-term list of milestones.  I suppose an example program is not
quite that, but it might help.  Do you have something along these
lines?  Or, if not, if I managed to put something together which
exercises a good cross-section of the features, do you think you could
include it with the next release?  I suppose there's a trade-off
between ease of maintaining the code through releases, and feature
coverage of the example(s)...

I'm CC-ing haskell-cafe in case anyone reading already has some
example code like this, which they'd be willing to donate?  If
possible, it ought to be small yet illustrate a lot of features.

Kind Regards,

On Thu, Apr 19, 2012 at 10:10 AM, Ivan Lazar Miljenovic
<ivan.miljenovic at gmail.com> wrote:
> I should have pointed out that for most people, there should be
> minimal to no API change with this release; the only change I needed
> to make in my own code was that a type-class I had defined in
> Graphalyze was removed as it provided the impetus for the ToGraphID
> class mentioned below.
> On 19 April 2012 22:52, Ivan Lazar Miljenovic <ivan.miljenovic at gmail.com> wrote:
>> I'm hoping the second part of the version number isn't ominous, but
>> I've just uploaded the latest release in my bindings for the Graphviz
>> suite of graph visualisation tools.
>> The changes in this release are:
>> * Added support for the `osage` and `patchwork` visualisation tools,
>>  available as of Graphviz-2.28.0.
>> * Updated attributes as of Graphviz-2.28.0:
>>    - `SVG` colors are now supported, and the support for different
>>      colors has been revamped.
>>    - `overlap=false` is now equivalent to `overlap=prism` and the
>>      `RemoveOverlaps` option has been removed.
>>    - `LabelScheme` and `Rotation` are new attributes for use with
>>      `sfdp`.
>>    - `Scale` is a new attribute for use with `twopi`.
>>    - Add new italics, bold, underline, superscript and subscript
>>      options for HTML-like labels.
>>    - `LHeight` and `LWidth` for getting the height and width of the
>>      root graph and clusters.
>> * Updated attributes from the current development branch of Graphviz
>>  (i.e. 2.29.*).  Please note that these will probably not work yet,
>>  but are implemented now for future-proofing.
>>    - A new style for edges: `Tapered`.
>>    - `XLabel` allows you to specify labels external to a node or
>>      edge.  `ForceLabels` allow you to specify that these should be
>>      drawn even when they will cause overlaps.
>>    - `ImagePath` allows you to specify where to search for images.
>>    - HTML-like labels now support `ID` values as well as horizontal
>>      and vertical rules.
>>    - `BgColor` and `FillColor` now take a list of colors: this allows
>>      gradient fills for graphs, clusters and nodes.  The `Radial`
>>      style and `GradientAngle` are also used for this purpose.
>>    - `FillColor` is now used by edges to set the color of any arrows.
>>    - [WebP](http://en.wikipedia.org/wiki/WebP) output support added.
>> * Other attribute changes:
>>    - Use a specified data type for the `Ordering` attribute rather
>>      than an arbitrary `Text` value, and provide a documented wrapper
>>      in `Data.GraphViz.Attributes`.
>>    - `Bb` has been renamed `BoundingBox`.
>>    - `ID` now only takes `EscString` (a type alias for `Text`) values
>>      rather than arbitrary `Label`s.
>>    - The `Data.GraphViz.Attributes.HTML` module has had all values
>>      re-named and is now meant to be imported qualified.  It is also
>>      no longer re-exported from `Data.GraphViz.Attributes.Complete`.
>> * The `ToGraphID` class provides a common wrapper to help create
>>  cluster identifiers, etc.
>> * Cabal's `Test-Suite` functionality is now used.  As part of this,
>>  the `Data.GraphViz.Testing` module and sub-modules are no longer
>>  exported by the library.
>> * The new `Benchmark` support in Cabal-1.14 is now used for the
>>  benchmark script.
>> * Dropped support for base-3.
>> * The `Data.GraphViz.State` module is no longer exposed, as there's no
>>  need for users to use it.
>> * Bugfixes:
>>    - Some corner cases in canonicalisation prevented it from being
>>      idempotent.
>>    - The `TestParsing` script will no longer crash and refuse to
>>      continue if an IO-based error (e.g. unable to successfully call
>>      `dot`) occurs.
>>    - A typo was spotted by **Gabor Greif**.
>> --
>> Ivan Lazar Miljenovic
>> Ivan.Miljenovic at gmail.com
>> http://IvanMiljenovic.wordpress.com
> --
> Ivan Lazar Miljenovic
> Ivan.Miljenovic at gmail.com
> http://IvanMiljenovic.wordpress.com
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