Provided by: libsvg-tt-graph-perl_0.16+git-1_all bug


       SVG::TT::Graph - Base object for generating SVG Graphs


         package SVG::TT::Graph::GRAPH_TYPE
         use SVG::TT::Graph;
         use base qw(SVG::TT::Graph);
         use vars qw($VERSION);
         $VERSION = $SVG::TT::Graph::VERSION;
         $TEMPLATE_FH = \*DATA;

         sub _set_defaults {
           my $self = shift;

           my %default = (
               'keys'  => 'value',
           while( my ($key,$value) = each %default ) {
             $self->{config}->{$key} = $value;

         # optional - called when object is created
         sub _init {
           my $self = shift;
         # any testing you want to do.



         <!-- SVG Template goes here  -->

         In your script:

         use SVG::TT::Graph::GRAPH_TYPE;

         my $width = '500',
         my $heigh = '300',
         my @fields = qw(field_1 field_2 field_3);

         my $graph = SVG::TT::Graph::GRAPH_TYPE->new({
           # Required for some graph types
           'fields'           => \@fields,
           # .. other config options
           'height' => '500',

         my @data = qw(23 56 32);
           'data' => \@data,
           'title' => 'Sales 2002',

         # find a config options value
         my $config_value = $graph->config_option();
         # set a config option value

         # All graphs support SVGZ (compressed SVG) if
         # Compress::Zlib is available.
         # either 'compress' => 1 config option, or

         # All graph SVGs can be tidied if XML::Tidy
         # Compress::Zlib is installed.
         # either 'tidy' => 1 config option, or

         print "Content-type: image/svg+xml\n\n";
         print $graph->burn();


       This package should be used as a base for creating SVG graphs. If XML::Tidy is installed,
       the SVG files generated are tidied.

       See SVG::TT::Graph::Line for an example.


         my @data_sales_02 = qw(12 45 21);

           'data' => \@data_sales_02,
           'title' => 'Sales 2002',

       This method allows you do add data to the graph object.  It can be called several times to
       add more data sets in.

         my $graph->clear_data();

       This method removes all data from the object so that you can reuse it to create a new
       graph but with the same config options.

         print $graph->get_template();

       This method returns the TT template used for making the graph.

         print $graph->burn();

       This method processes the template with the data and config which has been set and returns
       the resulting SVG.

       This method will croak unless at least one data set has been added to the graph object.


       If Compress::Zlib is installed, the content of the SVG file can be compressed.  This
       get/set method controls whether or not to compress. The default is 1 if Compress::Zlib is
       available, 0 otherwise.


       If XML::Tidy is installed, the content of the SVG file can be formatted in a prettier way.
       This get/set method controls whether or not to tidy. The default is 1 if XML::Tidy is
       available, 0 otherwise.

   config methods
         my $value = $graph->method();

       This object provides autoload methods for all config options defined in the _set_default
       method within the inheriting object.

       See the SVG::TT::Graph::GRAPH_TYPE documentation for a list.


       For examples look at the project home page


       None by default.


       Thanks to Foxtons for letting us put this on CPAN.  Todd Caine for heads up on reparsing
       the template (but not using atm) David Meibusch for TimeSeries and a load of other ideas
       Thanks for all the patches supplied by Andrew Ruthven and others


       Leo Lapworth ( and Stephen Morgan (TT and SVG)


       SVG::TT::Graph::Line, SVG::TT::Graph::Bar, SVG::TT::Graph::BarHorizontal,
       SVG::TT::Graph::BarLine, SVG::TT::Graph::Pie, SVG::TT::Graph::TimeSeries, Compress::Zlib,


       Copyright (C) 2003, Leo Lapworth

       This module is free software; you can redistribute it or modify it under the same terms as
       Perl itself.