NAME

Graph::Easy::Attributes - Define and check attributes for Graph::Easy

SYNOPSIS

        use Graph::Easy::Attributes;

        my $hexred   = Graph::Easy::Attributes->color_as_hex( 'red' );
        print Graph::Easy::Attributes->valid_attribute( 'color', 'red' );

DESCRIPTION

Graph::Easy::Attributes contains the definitions of valid attribute names and values for Graph::Easy. It is used by both the parser and by Graph::Easy to check attributes. You shouldn't use it directly.

METHODS

valid_attribute()

        my $new_value = Graph::Easy::Attributes->valid_attribute( $name, $value );

        if (!defined $new_value)
          {
          # throw error
          die ("'$value' is not valid for attribute '$name'");
          }

Check that a $name,$value pair is a valid attribute and return a new value.

The return value can differ from the passed in value, f.i.:

        print Graph::Easy::Attributes->valid_attribute( 'color', 'red' );

This would print '#ff0000';

color_as_hex()

        my $hexred   = Graph::Easy::Attributes->color_as_hex( 'red' );
        my $hexblue  = Graph::Easy::Attributes->color_as_hex( '#0000ff' );
        my $hexcyan  = Graph::Easy::Attributes->color_as_hex( '#f0f' );
        my $hexgreen = Graph::Easy::Attributes->color_as_hex( 'rgb(0,255,0)' );

Takes a valid color name or definition (hex, short hex, or RGB) and returns the color in hex like #ff00ff.

EXPORT

Exports nothing.

SEE ALSO

Graph::Easy.

AUTHOR

Copyright (C) 2004 - 2005 by Tels http://bloodgate.com

See the LICENSE file for information.