NAME GraphViz2::Abstract::Node - Deal with nodes independent of a Graph VERSION version 0.002000 SYNOPSIS use GraphViz2::Abstract::Node; my $node = GraphViz2::Abstract::Node->new( color => ... , id => ... , label => ... , ); # Mutate $node $node->label("Asdft"); my $fillcolor = $node->fillcolor(); # Knows that the fill color is light grey despite never setting it. # Later: $graph->add_node(%{ $node->as_hash }); # Adds only the data that is not the same as GraphViz's defaults $graph->add_node(%{ $node->as_canon_hash }); # Adds all the data, including hardcoded defaults DESCRIPTION Working with GraphViz2, I found myself frequently needing shared styles for things, and I often had trouble knowing which fields were and weren't valid for given things, for instance: "Nodes". Its reasonably straight forward to ask the question "What is the attribute "foo" applicable to" using the GraphViz website, but much harder to know "What are all the attributes applicable to "foo"". Let alone work with them in a user friendly way from code. Naming Rationale I tried to choose a name that was not so likely to threaten GraphViz2 if GraphViz2 wanted to make a different variation of what I'm doing, but as part of GraphViz2 itself. As such, I plan on a few "::Abstract" things, that aim to be stepping stones for dealing with complex data independent of "GraphViz2", but in such a way that they make importing that data into "GraphViz2" easy. METHODS "as_hash" This method returns all the values of all properties that DIFFER from the defaults. e.g. Node->new( color => 'black' )->as_hash(); Will return an empty list, as the default color is normally black. See also how special constants work in "as_canon_hash" This method returns all the values of all properties, INCLUDING defaults. e.g. Node->new( color => 'black' )->as_canon_hash(); Will return a very large list containing all the properties that we know the default values for. See also how special constants work in ATTRIBUTES "URL" Default: "none" "area" Default: 1.0 "color" Default: "black" "colorscheme" Default: "" "comment" Default: "" "distortion" Default: 0.0 "fillcolor" Default: "lightgrey" "fixedsize" Default: "false" "fontcolor" Default: "black" "fontname" Default: "Times-Roman" "fontsize" Default: 14.0 "gradientangle" Default: "" "group" Default: "" "height" Default: 0.5 "href" Default: "" "id" Default: "" "image" Default: "" "imagescale" Default: "false" ( Yes, really! ) "label" Default: "\\N" ( Appears to be a magic value for GraphViz ) "labelloc" Default: "c" "layer" Default: "" "margin" Default: "unknown" ( Due to being render device specific defaults ) "nojustify" Default: "false" "ordering" Default: "" "orientation" Default: 0.0 "penwidth" Default: 1.0 "peripheries" Default: "unknown" "pos" Default: "unknown" "rects" Default: "unknown" "regular" Default: "false" "root" Default: "false" "samplepoints" Default: "unknown" Reason: Dependent on render device. "shape" Default: "ellipse" "shapefile" Default: "" "showboxes" Default: 0 "sides" Default: 4 "skew" Default: 0.0 "sortv" Default: 0 "style" Default: "" "target" Default: "none" "tooltip" Default: "" "vertices" Default: "unknown" "width" Default: 0.75 "xlabel" Default: "" "xlp" Default: "" "z" Default: 0.0 AUTHOR Kent Fredric COPYRIGHT AND LICENSE This software is copyright (c) 2013 by Kent Fredric . This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.