GraphViz::Traverse - Build a GraphViz object via callback traversal

  use GraphViz::Traverse;

A GraphViz::Traverse object represents a base class for inheriting by other traversal modules.

  my $g = GraphViz::Traverse->new($arguments);

Return a new GraphViz::Traverse instance. Valid arguments are listed below (taken from man dot and GraphViz::Traverse):

  _DEBUG       = Class instance setting
  bgcolor      = Class instance setting
  center       = n a non-zero value centers the drawing on the page.
  color        = color value sets foreground color (bgcolorfor background).
  concentrate  = Class instance setting
  directed     = Class instance setting
  epsilon      = Class instance setting
  height       = Class instance setting
  href         = "url" the default url for image map files; in PostScript files, the base URL for all relative URLs, as recognized by Acrobat Distiller 3.0 and up.
  layers       = "id:id:id:id" is a sequence of layer identifiers for overlay diagrams. The PostScript array variable layercolorseqsets the assignment of colors to layers. The least indexis1and each element must be a 3-ele- ment array to be interpreted as a color coordinate.
  layout       = Class instance setting
  margin       = f sets the page margin (included in the page size).
  no_overlap   = Class instance setting
  nodesep      = f sets the minimum separation between nodes.
  nslimit      = f ormclimit=f adjusts the bound on the number of network simplexormincross iterations by the givenratio. For example,mclimit=2.0runs twice as long.
  ordering     = out constrains order of out-edges in a subgraph according to their file sequence.
  overlap      = Class instance setting
  page         = "x,y" sets the PostScript pagination unit.
  pagedir      = [TBLR][TBLR] sets the major and minor order of pagination.
  pageheight   = Class instance setting
  pagewidth    = Class instance setting
  random_start = Class instance setting
  rank         = same (or minor max) inasubgraph constrains the rank assignment of its nodes. If a subgraph's name has the prefixcluster, its nodes are drawn in a distinct rectangle of the layout. Clusters may be nested.
  rankdir      = LR|RL|BT requests a left-to-right, right-to-left, or bottom-to-top, drawing.
  ranksep      = f sets the minimum separation between ranks.
  ratio        = f sets the aspect ratio tof which may be a floating point number, orone of the keywordsfill, compress,orauto.
  rotate       = 90 sets landscape mode. (orientation=landis backward compatible but obsolete.)
  size         = "x,y" sets bounding box of drawing in inches.
  stylesheet   = "file.css" includes a reference to a stylesheet in -Tsvg and -Tsvgz outputs. Ignored by other formats.
  URL          = "url" ("URL" is a synonym for "href".)
  width        = Class instance setting

  $g->mark_item( $node );
  $g->mark_item( $child, $parent );

Add a node or an edge to the GraphViz::Traverse object. This method is to be used by the traverse method.

  $g->traverse($root);

Traverse a structure starting at a given root node. This method is to be overridden by an inheriting class with specific traversal actions for the GraphViz dot attributes listed below. Please see GraphViz::Traverse::Filesystem for an example of this attribute overriding.

Node attributes:

  color
  distortion
  fillcolor
  fixedsize
  fontcolor
  fontname
  fontsize
  height
  href
  label
  layer
  orientation
  peripheries
  regular
  shape
  sides
  skew
  style
  target
  tooltip
  URL
  width

Edge attributes:

  arrowhead
  arrowsize
  arrowtail
  color
  constraint
  decorate
  dir
  fontcolor
  fontname
  fontsize
  headURL
  headclip
  headhref
  headlabel
  headtarget
  headtooltip
  href
  label
  labelangle
  labeldistance
  layer
  minlen
  port_label_distance
  samehead
  sametail
  style
  tailURL
  tailclip
  tailhref
  taillabel
  tailtooltip
  target
  tooltip
  URL
  weight

Document this code better.

Brad Choate <bchoate@cpan.org> for untangling my AUTOLOADing.

GraphViz

GraphViz::Traverse::Filesystem

Copyright 2006, Gene Boggs, All Rights Reserved

You may use this module under the license terms of the parent GraphViz package.

Gene Boggs <gene@cpan.org>