Extension talk:GraphViz/v0.9

tags
I have installed GraphViz on a Debain server using apt.

I seem to have most/all of the executables installed and have put Graphviz.php in the extensions directory. Unfortunately it seems that MediaWiki is not interpreting the tags.

Is there a 'preferred' way to test the extension(s)?

I trust you also added include("extensions/Graphviz.php"); $wgGraphVizSettings->dotCommand = "$DOT_PATH/dot"; to your LocalSettings.php. After that you can test if it works with the code: digraph G{ A -> B } If you see a graph with a blob A connected with an arrow to a blob B then it works.

Some of my experiences: --Coriolan 05:37, 14 Jun 2005 (UTC)
 * 1) The current sources of Graphviz.php are in Wicle's CVS.
 * 2) When compiling the Graphviz from the sources I needed the --with-mylibgd to get dot generate .png files.
 * 3) The graphs seen in IslandSeeds look better because that engine runs on Mac (see } and its follow-up.

Windows
What's the point in this?

if (substr(php_uname, 0, 7) == "Windows") { $ext = "gif"; } else { $ext = "png"; }

.png is used everywhere else in the file, so this actually makes it break! I removed it and changed the $txt line to always use .png.


 * Answer: I just started installing EasyTimeline and found that it's left over from that, so just remove it. --ProgMania 17:35, 9 September 2005 (UTC)

Also I found it necessary to use $ret = `"{$cmdline}"`; instead of        $ret = `{$cmdline}`; although I don't know why!

Thanks for the extension, it looks like it could be very useful once I get the hang of it!

--ProgMania 23:20, 3 September 2005 (UTC)

safe_mode and antialiased rendering
please use popen instead of shell_exec, so that php safe_mode can work. not all of us want to run our servers as loose as a mexican whore.

i've also modified this plugin to use GraphicsMagick to render antialiased graphs from dot's svg output, it works very nice indeed. --207.109.251.117 11:26, 6 November 2005 (UTC)


 * Can you please provide the modified plugin? --202.1.193.10 17:45, 13 January 2006 (UTC)

Some Help Getting Graphviz to Work
I have an unusual set up as in I have a Uniform Server's WAMP ( Windows Apache MySQL PHP ) running from a Thumbdrive. Mediawiki ver 1.5. Graphviz.php extension installed The Graphviz is installed in the psedo drive W:\usr\local\ATT\Graphviz
 * The dot.exe is therefore W:\usr\local\ATT\Graphviz\bin

While adding in elements does have a Dos Prompt window pop-up momentarily, the resulting graph was never generated.

''Has anyone encountered this problem? And found a solution?'' Suggestions?

Deletion of unused images
Hi is it possible to delete all the unused pngs ? i got only 20 images with graphviz, but the creationprocess produced over 400 files...(testing and stuff :) ) Is it possible to delete those ? They mess up my box :-/

Size limit and work-arounds
I'm using the GraphViz extension w/ great delight (hoping to get my company's employees to document some of their formal business processes using the GraphViz extension on the company's MediaWiki-based wiki thing). However, I have been hitting an apparent size limit on the size of the graph you can specify using the GraphViz extension (go figure... there's a size limit on GET request lengths, after all).

So, for a simple work-around, I'm advising my users to split up their graphs into several subgraphs (only slightly nasty-looking, and there's probably some slick way to make it look almost like one connected graph).

For a more complicated work-around, I'm considering making a revised version of the tag(s) (e.g. &lt;dot_graph&gt;) that would "optimize" the graph code for reduced length (only on conversion into raw HTML), doing things like stripping out comments and renaming labeled nodes (to give them a super-short name while still allowing verbose node names in the original Wiki markup).

Just a thought. Nothing's really happening yet, and I thought it would be nice to at least warn people about the length limit (above). Mlibby 17:04, 22 December 2006 (UTC)


 * Maybe I'll include an approach like this, too: http://meta.wikimedia.org/wiki/User_talk:Cygon/Graphviz_Extension#Shorting%20the%20URLs Mlibby 17:14, 22 December 2006 (UTC)

Use with MW1.10
Has anyone been able to make any of the GraphViz extensions work with MediaWiki version 1.10? I have tried both this one and the one at http://www2.hds.utc.fr/~rherault/index.php/Graphviz_Extension, and neither works. Pages show up without content (completely white) as soon as I activate the extension in LocalSettings. Any advice would be gratefully accepted. 160.33.43.231 July 2nd, 2007, 12:00pm PDT