File Coverage

blib/lib/Excel/Writer/XLSX/Chart/Pie.pm

Criterion	Covered	Total	%
statement	105	107	98.1
branch	15	20	75.0
condition	7	11	63.6
subroutine	16	16	100.0
pod	1	2	50.0
total	144	156	92.3

package Excel::Writer::XLSX::Chart::Pie;

###############################################################################
#
# Pie - A class for writing Excel Pie charts.
#
# Used in conjunction with Excel::Writer::XLSX::Chart.
#
# See formatting note in Excel::Writer::XLSX::Chart.
#
# Copyright 2000-2019, John McNamara, [e-mail]
#
# Documentation after __END__
#

# perltidy with the following options: -mbl=2 -pt=0 -nola

use 5.008002;
use strict;
use warnings;
use Carp;
use Excel::Writer::XLSX::Chart;

our @ISA     = qw(Excel::Writer::XLSX::Chart);
our $VERSION = '1.03';


###############################################################################
#
# new()
#
#
sub new {

    my $class = shift;
    my $self  = Excel::Writer::XLSX::Chart->new( @_ );

    $self->{_vary_data_color} = 1;
    $self->{_rotation}        = 0;

    # Set the available data label positions for this chart type.
    $self->{_label_position_default} = 'best_fit';
    $self->{_label_positions} = {
        center      => 'ctr',
        inside_end  => 'inEnd',
        outside_end => 'outEnd',
        best_fit    => 'bestFit',
    };

    bless $self, $class;
    return $self;
}


###############################################################################
#
# set_rotation()
#
# Set the Pie/Doughnut chart rotation: the angle of the first slice.
#
sub set_rotation {

    my $self     = shift;
    my $rotation = shift;

    return if !defined $rotation;

    if ( $rotation >= 0 && $rotation <= 360 ) {
        $self->{_rotation} = $rotation;
    }
    else {
        carp "Chart rotation $rotation outside range: 0 <= rotation <= 360";
    }
}


##############################################################################
#
# _write_chart_type()
#
# Override the virtual superclass method with a chart specific method.
#
sub _write_chart_type {

    my $self = shift;

    # Write the c:pieChart element.
    $self->_write_pie_chart( @_ );
}


##############################################################################
#
# _write_pie_chart()
#
# Write the  element.  Over-ridden method to remove axis_id code
# since Pie charts don't require val and cat axes.
#
sub _write_pie_chart {

    my $self = shift;

    $self->xml_start_tag( 'c:pieChart' );

    # Write the c:varyColors element.
    $self->_write_vary_colors();

    # Write the series elements.
    $self->_write_ser( $_ ) for @{ $self->{_series} };

    # Write the c:firstSliceAng element.
    $self->_write_first_slice_ang();

    $self->xml_end_tag( 'c:pieChart' );
}


##############################################################################
#
# _write_plot_area().
#
# Over-ridden method to remove the cat_axis() and val_axis() code since
# Pie/Doughnut charts don't require those axes.
#
# Write the  element.
#
sub _write_plot_area {

    my $self = shift;
    my $second_chart = $self->{_combined};

    $self->xml_start_tag( 'c:plotArea' );

    # Write the c:layout element.
    $self->_write_layout( $self->{_plotarea}->{_layout}, 'plot' );

    # Write the subclass chart type element.
    $self->_write_chart_type();

    # Configure a combined chart if present.
    if ( $second_chart ) {

        # Secondary axis has unique id otherwise use same as primary.
        if ( $second_chart->{_is_secondary} ) {
            $second_chart->{_id} = 1000 + $self->{_id};
        }
        else {
            $second_chart->{_id} = $self->{_id};
        }

        # Shart the same filehandle for writing.
        $second_chart->{_fh} = $self->{_fh};

        # Share series index with primary chart.
        $second_chart->{_series_index} = $self->{_series_index};

        # Write the subclass chart type elements for combined chart.
        $second_chart->_write_chart_type();
    }

    # Write the c:spPr element for the plotarea formatting.
    $self->_write_sp_pr( $self->{_plotarea} );

    $self->xml_end_tag( 'c:plotArea' );
}


##############################################################################
#
# _write_legend().
#
# Over-ridden method to add  to legend.
#
# Write the  element.
#
sub _write_legend {

    my $self          = shift;
    my $legend        = $self->{_legend};
    my $position      = $legend->{_position} || 'right';
    my $font          = $legend->{_font};
    my @delete_series = ();
    my $overlay       = 0;

    if ( defined $legend->{_delete_series}
        && ref $legend->{_delete_series} eq 'ARRAY' )
    {
        @delete_series = @{ $legend->{_delete_series} };
    }

    if ( $position =~ s/^overlay_// ) {
        $overlay = 1;
    }

    my %allowed = (
        right     => 'r',
        left      => 'l',
        top       => 't',
        bottom    => 'b',
        top_right => 'tr',
    );

    return if $position eq 'none';
    return unless exists $allowed{$position};

    $position = $allowed{$position};

    $self->xml_start_tag( 'c:legend' );

    # Write the c:legendPos element.
    $self->_write_legend_pos( $position );

    # Remove series labels from the legend.
    for my $index ( @delete_series ) {

        # Write the c:legendEntry element.
        $self->_write_legend_entry( $index );
    }

    # Write the c:layout element.
    $self->_write_layout( $legend->{_layout}, 'legend' );

    # Write the c:overlay element.
    $self->_write_overlay() if $overlay;

    # Write the c:spPr element.
    $self->_write_sp_pr( $legend );

    # Write the c:txPr element. Over-ridden.
    $self->_write_tx_pr_legend( 0, $font );

    $self->xml_end_tag( 'c:legend' );
}


##############################################################################
#
# _write_tx_pr_legend()
#
# Write the  element for legends.
#
sub _write_tx_pr_legend {

    my $self     = shift;
    my $horiz    = shift;
    my $font     = shift;
    my $rotation = undef;

    if ( $font && exists $font->{_rotation} ) {
        $rotation = $font->{_rotation};
    }

    $self->xml_start_tag( 'c:txPr' );

    # Write the a:bodyPr element.
    $self->_write_a_body_pr( $rotation, $horiz );

    # Write the a:lstStyle element.
    $self->_write_a_lst_style();

    # Write the a:p element.
    $self->_write_a_p_legend( $font );

    $self->xml_end_tag( 'c:txPr' );
}


##############################################################################
#
# _write_a_p_legend()
#
# Write the  element for legends.
#
sub _write_a_p_legend {

    my $self = shift;
    my $font = shift;

    $self->xml_start_tag( 'a:p' );

    # Write the a:pPr element.
    $self->_write_a_p_pr_legend( $font );

    # Write the a:endParaRPr element.
    $self->_write_a_end_para_rpr();

    $self->xml_end_tag( 'a:p' );
}


##############################################################################
#
# _write_a_p_pr_legend()
#
# Write the  element for legends.
#
sub _write_a_p_pr_legend {

    my $self = shift;
    my $font = shift;
    my $rtl  = 0;

    my @attributes = ( 'rtl' => $rtl );

    $self->xml_start_tag( 'a:pPr', @attributes );

    # Write the a:defRPr element.
    $self->_write_a_def_rpr( $font );

    $self->xml_end_tag( 'a:pPr' );
}


##############################################################################
#
# _write_vary_colors()
#
# Write the  element.
#
sub _write_vary_colors {

    my $self = shift;
    my $val  = 1;

    my @attributes = ( 'val' => $val );

    $self->xml_empty_tag( 'c:varyColors', @attributes );
}


##############################################################################
#
# _write_first_slice_ang()
#
# Write the  element.
#
sub _write_first_slice_ang {

    my $self = shift;
    my $val  = $self->{_rotation};

    my @attributes = ( 'val' => $val );

    $self->xml_empty_tag( 'c:firstSliceAng', @attributes );
}

1;


__END__