Gecko [ fernandoquevedodop.com ]

Name	Size	Permission
Area.pm	4.76 KB	-rw-r--r--
Bar.pm	6.11 KB	-rw-r--r--
Column.pm	4.99 KB	-rw-r--r--
External.pm	2.76 KB	-rw-r--r--
Line.pm	4.76 KB	-rw-r--r--
Pie.pm	5.17 KB	-rw-r--r--
Scatter.pm	6.24 KB	-rw-r--r--
Stock.pm	7.34 KB	-rw-r--r--

Code Editor : Pie.pm

package Spreadsheet::WriteExcel::Chart::Pie;

###############################################################################
#
# Pie - A writer class for Excel Pie charts.
#
# Used in conjunction with Spreadsheet::WriteExcel::Chart.
#
# See formatting note in Spreadsheet::WriteExcel::Chart.
#
# Copyright 2000-2010, John McNamara, jmcnamara@cpan.org
#
# Documentation after __END__
#

require Exporter;

use strict;
use Spreadsheet::WriteExcel::Chart;

use vars qw($VERSION @ISA);
@ISA = qw(Spreadsheet::WriteExcel::Chart Exporter);

$VERSION = '2.40';

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

my $class = shift;
    my $self  = Spreadsheet::WriteExcel::Chart->new( @_ );

$self->{_vary_data_color} = 1;

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

###############################################################################
#
# _store_chart_type()
#
# Implementation of the abstract method from the specific chart class.
#
# Write the Pie chart BIFF record.
#
sub _store_chart_type {

my $self = shift;

my $record = 0x1019;    # Record identifier.
    my $length = 0x0006;    # Number of bytes to follow.
    my $angle  = 0x0000;    # Angle.
    my $donut  = 0x0000;    # Donut hole size.
    my $grbit  = 0x0002;    # Option flags.

my $header = pack 'vv', $record, $length;
    my $data = '';
    $data .= pack 'v', $angle;
    $data .= pack 'v', $donut;
    $data .= pack 'v', $grbit;

$self->_append( $header, $data );
}

###############################################################################
#
# _store_axisparent_stream(). Overridden.
#
# Write the AXISPARENT chart substream.
#
# A Pie chart has no X or Y axis so we override this method to remove them.
#
sub _store_axisparent_stream {

my $self = shift;

$self->_store_axisparent( @{ $self->{_config}->{_axisparent} } );

$self->_store_begin();
    $self->_store_pos( @{ $self->{_config}->{_axisparent_pos} } );

$self->_store_chartformat_stream();
    $self->_store_end();
}

__END__

=head1 NAME

Pie - A writer class for Excel Pie charts.

=head1 SYNOPSIS

To create a simple Excel file with a Pie chart using Spreadsheet::WriteExcel:

#!/usr/bin/perl -w

use strict;
    use Spreadsheet::WriteExcel;

my $workbook  = Spreadsheet::WriteExcel->new( 'chart.xls' );
    my $worksheet = $workbook->add_worksheet();

my $chart     = $workbook->add_chart( type => 'pie' );

# Configure the chart.
    $chart->add_series(
        categories => '=Sheet1!$A$2:$A$7',
        values     => '=Sheet1!$B$2:$B$7',
    );

# Add the worksheet data the chart refers to.
    my $data = [
        [ 'Category', 2, 3, 4, 5, 6, 7 ],
        [ 'Value',    1, 4, 5, 2, 1, 5 ],
    ];

$worksheet->write( 'A1', $data );

__END__

=head1 DESCRIPTION

This module implements Pie charts for L<Spreadsheet::WriteExcel>. The chart object is created via the Workbook C<add_chart()> method:

my $chart = $workbook->add_chart( type => 'pie' );

Once the object is created it can be configured via the following methods that are common to all chart classes:

$chart->add_series();
    $chart->set_title();

These methods are explained in detail in L<Spreadsheet::WriteExcel::Chart>. Class specific methods or settings, if any, are explained below.

=head1 Pie Chart Methods

There aren't currently any pie chart specific methods. See the TODO section of L<Spreadsheet::WriteExcel::Chart>.

A Pie chart doesn't have an X or Y axis so the following common chart methods are ignored.

$chart->set_x_axis();
    $chart->set_y_axis();

=head1 EXAMPLE

Here is a complete example that demonstrates most of the available features when creating a chart.

#!/usr/bin/perl -w

use strict;
    use Spreadsheet::WriteExcel;

my $workbook  = Spreadsheet::WriteExcel->new( 'chart_pie.xls' );
    my $worksheet = $workbook->add_worksheet();
    my $bold      = $workbook->add_format( bold => 1 );

# Add the worksheet data that the charts will refer to.
    my $headings = [ 'Category', 'Values' ];
    my $data = [
        [ 'Apple', 'Cherry', 'Pecan' ],
        [ 60,       30,       10     ],
    ];

$worksheet->write( 'A1', $headings, $bold );
    $worksheet->write( 'A2', $data );

# Create a new chart object. In this case an embedded chart.
    my $chart = $workbook->add_chart( type => 'pie', embedded => 1 );

# Configure the series.
    $chart->add_series(
        name       => 'Pie sales data',
        categories => '=Sheet1!$A$2:$A$4',
        values     => '=Sheet1!$B$2:$B$4',
    );

# Add a title.
    $chart->set_title( name => 'Popular Pie Types' );

# Insert the chart into the worksheet (with an offset).
    $worksheet->insert_chart( 'C2', $chart, 25, 10 );

__END__

=begin html

<p>This will produce a chart that looks like this:</p>

=end html

=head1 AUTHOR

John McNamara jmcnamara@cpan.org

=head1 COPYRIGHT

${this.title}

Code Editor : Pie.pm