Graph::Writer::VCG(3pm)

Usage

  use Graph;
  use Graph::Writer::VCG;
  $graph = Graph->new();
  # add edges and nodes to the graph
  $writer = Graph::Writer::VCG->new();
  $writer->write_graph($graph, 'mygraph.vcg');

Overview

Graph::Writer::VCG is a class for writing out a directed graph in the file format used by the VCG tool, originally developed for Visualising Compiler Graphs. The graph must be an instance of the Graph class, which is actually a set of classes developed by Jarkko Hietaniemi.

If you have defined any attributes for the graph, nodes, or edges, they will be written out to the file, as long as they are attributes understood by VCG.

Methods

new()

Constructor - generate a new writer instance.

  $writer = Graph::Writer::VCG->new();

This doesn't take any arguments.

write_graph()

Write a specific graph to a named file:

  $writer->write_graph($graph, $file);

The $file argument can either be a filename, or a filehandle for a previously opened file.

Known bugs and limitations

•: Attributes with non-atomic values aren't currently handled. This includes the loc, classname, colorentry, and infoname attributes for graphs, and the loc attribute for nodes,

•: Can currently only handle graph, node, and edge elements and their attributes. So doesn't know about foldnode_defaults and things like that.

Repository

<https://github.com/neilb/Graph-ReadWrite>

Releases

8 releases since Debian 6.0 (Squeeze); the text changed 5 times.