package Template::Plugin::GD::Graph::bars;

use strict;
use warnings;
use base qw( GD::Graph::bars Template::Plugin );

our $VERSION = sprintf("%d.%02d", q$Revision: 1.58 $ =~ /(\d+)\.(\d+)/);

sub new {
    my $class   = shift;
    my $context = shift;
    return $class->SUPER::new(@_);
}

sub set {
    my $self = shift;
    push(@_, %{pop(@_)}) if ( @_ & 1 && ref($_[@_-1]) eq "HASH" );
    $self->SUPER::set(@_);
}


sub set_legend {
    my $self = shift;
    $self->SUPER::set_legend(ref $_[0] ? @{$_[0]} : @_);
}

1;

__END__

=head1 NAME

Template::Plugin::GD::Graph::bars - Create bar graphs with axes and legends

=head1 SYNOPSIS

    [% USE g = GD.Graph.bars(x_size, y_size); %]

=head1 EXAMPLES

    [% FILTER null;
        data = [  
            ["1st","2nd","3rd","4th","5th","6th","7th", "8th", "9th"],
            [    1,    2,    5,    6,    3,  1.5,    1,     3,     4],
        ];
        
        USE my_graph = GD.Graph.bars();
        
        my_graph.set(
            x_label         => 'X Label',
            y_label         => 'Y label',
            title           => 'A Simple Bar Chart',
            y_max_value     => 8,
            y_tick_number   => 8, 
            y_label_skip    => 2,

            # shadows
            bar_spacing     => 8,
            shadow_depth    => 4, 
            shadowclr       => 'dred',

            transparent     => 0,
        );      
        my_graph.plot(data).png | stdout(1);
       END;
    -%]

    [% FILTER null;
        data = [
            ["1st","2nd","3rd","4th","5th","6th","7th", "8th", "9th"],
            [    5,   12,   24,   33,   19,    8,    6,    15,    21],
            [    1,    2,    5,    6,    3,  1.5,    1,     3,     4],
        ];      
        
        USE my_graph = GD.Graph.bars();

        my_graph.set(
            x_label         => 'X Label',
            y_label         => 'Y label',
            title           => 'Two data sets',
        
            # shadows
            bar_spacing     => 8,
            shadow_depth    => 4,
            shadowclr       => 'dred',

            long_ticks      => 1,
            y_max_value     => 40,
            y_tick_number   => 8,
            y_label_skip    => 2,
            bar_spacing     => 3,

            accent_treshold => 200,

            transparent     => 0,
        );
        my_graph.set_legend( 'Data set 1', 'Data set 2' );
        my_graph.plot(data).png | stdout(1);
       END;
    -%]

=head1 DESCRIPTION

The GD.Graph.bars plugin provides an interface to the GD::Graph::bars
class defined by the GD::Graph module. It allows one or more (x,y) data
sets to be plotted with each point represented by a bar, in addition
to axes and legends.

See L<GD::Graph> for more details.

=head1 AUTHOR

Thomas Boutell wrote the GD graphics library.

Lincoln D. Stein wrote the Perl GD modules that interface to it.

Martien Verbruggen wrote the GD::Graph module.

Craig Barratt E<lt>craig@arraycomm.comE<gt> wrote the original GD
plugins for the Template Toolkit (2001).

Andy Wardley E<lt>abw@cpan.orgE<gt> extracted them from the TT core
into a separate distribution for TT version 2.15.

=head1 COPYRIGHT

Copyright (C) 2001 Craig Barratt E<lt>craig@arraycomm.comE<gt>, 
2006 Andy Wardley E<lt>abw@cpan.orgE<gt>.

GD::Graph is copyright 1999 Martien Verbruggen.

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

=head1 SEE ALSO

L<Template::Plugin::GD>, L<Template::Plugin::GD::Graph::lines>, L<Template::Plugin::GD::Graph::lines3d>, L<Template::Plugin::GD::Graph::bars3d>, L<Template::Plugin::GD::Graph::points>, L<Template::Plugin::GD::Graph::linespoints>, L<Template::Plugin::GD::Graph::area>, L<Template::Plugin::GD::Graph::mixed>, L<Template::Plugin::GD::Graph::pie>, L<Template::Plugin::GD::Graph::pie3d>, L<GD>

=cut

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