Workflow Graph

kratib - July 21, 2007 - 08:24

This module generates graphs from workflow definitions and instances.

It currently generates two distinct kinds of graphs:

One for the workflow definition, showing all workflow states, the
transitions linking them, and the roles allowed to perform those
transitions.
To access this graph, you currently need to patch the workflow.module
with this patch. A "Graph"
operation will then appear in front of each workflow on the Workflow admin
page. If you don't want to patch, you need to manually type the URL:

/admin/build/workflow/graph/<wid>
One for a workflow *instance history*, i.e. the path that a workflow
took for a specific node. Here, the graph shows all state transitions
that occurred on the node, including the timestamp and the users who
performed those transitions.
To access this graph, just go to any node that is workflow-enabled
(i.e. has a "Workflow" tab). It should now show a "Graph" tab that
displays the history graph.

NOTE: The following documentation applies to the latest stable release, not the development branch. The latter may contain new features and even change existing ones.

REQUIRES
* Graphviz tools on the system PATH
* PEAR::Image_GraphViz

IMPLEMENTATION NOTES
* Only tested on Ubuntu
* On antialiasing: Rendering antialiased graphs is not a piece of cake. On Ubuntu Feisty, I was lucky: just installing the package graphviz-cairo from universe automatically made the PNG output antialiased. If you don't have that luxury, you should manually get and install the graphviz cairo plugin (http://www.graphviz.org/pub/scm/graphviz-cairo/). Then, use the output format 'png:cairo' to render antialiased images.