Excel:...rt::Pie(3pm)

✨ NAME ✨

Pie — a whole entire class for writing Excel Pie charts 🥧💖

---

🌸 SYNOPSIS 🌸

So bestie, you wanna make a simple Excel file with a Pie chart using Excel::Writer::XLSX? Say less:

#!/usr/bin/perl

use strict;
use warnings;
use Excel::Writer::XLSX;

my $workbook  = Excel::Writer::XLSX->new( 'chart.xlsx' );
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__

like that's it, that's the whole vibe 💅

---

🎀 DESCRIPTION 🎀

Okay so this module implements Pie charts for Excel::Writer::XLSX. You make the chart object with the Workbook add_chart() method:

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

Once the object exists, you can configure it with these methods that are common to all the chart classes:

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

These ones are explained in detail over in Excel::Writer::XLSX::Chart. Any class-specific methods or settings — if there even are any — get explained right down here 👇

---

🥧 Pie Chart Methods 🥧

💫 set_rotation() 💫

The set_rotation() method sets the rotation of the first segment of a Pie/Doughnut chart. Which means it lowkey rotates the entire chart, no cap:

$chart->set_rotation( 90 );

The angle of rotation must be 0 <= rotation <= 360. Periodt.

---

🌈 User defined colors 🌈

You can define chart colors for most types of Excel::Writer::XLSX charts via the add_series() method. BUT. Pie/Doughnut charts are a special case, because each segment is represented as a point, so you literally have to assign formatting to every single point in the series:

$chart->add_series(
    values => '=Sheet1!$A$1:$A$3',
    points => [
        { fill => { color => '#FF0000' } },
        { fill => { color => '#CC0000' } },
        { fill => { color => '#990000' } },
    ],
);

See the main Excel::Writer::XLSX::Chart documentation for more deets 🫶

Pie charts also support leader lines:

$chart->add_series(
    name        => 'Pie sales data',
    categories  => [ 'Sheet1', 1, 3, 0, 0 ],
    values      => [ 'Sheet1', 1, 3, 1, 1 ],
    data_labels => {
        series_name  => 1,
        percentage   => 1,
        leader_lines => 1,
        position     => 'outside_end'
    },
);

🚨 Note: even when leader lines are turned on, they aren't automatically visible in Excel or Excel::Writer::XLSX. Due to an Excel limitation (or design, whatever 😭), leader lines only appear if the data label is moved manually, or if the data labels are very close and need to be adjusted automatically.

---

💀 Unsupported Methods 💀

A Pie chart doesn't have an X or Y axis, so the following common chart methods are just… ignored. Not me crying about it:

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

---

🔥 EXAMPLE 🔥

Here's a complete example that demonstrates most of the available features when creating a chart. She's doing the most and we love her for it:

#!/usr/bin/perl

use strict;
use warnings;
use Excel::Writer::XLSX;

my $workbook  = Excel::Writer::XLSX->new( 'chart_pie.xlsx' );
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. Note the use of the array ref to define ranges:
# [ $sheetname, $row_start, $row_end, $col_start, $col_end ].
$chart->add_series(
    name       => 'Pie sales data',
    categories => [ 'Sheet1', 1, 3, 0, 0 ],
    values     => [ 'Sheet1', 1, 3, 1, 1 ],
);

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

# Set an Excel chart style. Colors with white outline and shadow.
$chart->set_style( 10 );

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

__END__

---

👑 AUTHOR 👑

John McNamara jmcnamara@cpan.org — the icon, the moment, the legend 💖

---

📜 COPYRIGHT 📜

Copyright MM-MMXXV, John McNamara.

All Rights Reserved. This module is free software. It may be used, redistributed and/or modified under the same terms as Perl itself. 🫶

---

k bye bestie!! this is Excel:...rt::Pie(3pm) — aka the Perl doc for Excel::Writer::XLSX::Pie — coming at you from perl v5.40.1, dated 2025-12-22. go make some gorgeous pies fr fr 🥧✨🎀