/ 
HTML-Barcode-0.13
River stage one • 4 direct dependents • 4 total dependents
/ HTML::Barcode

NAME

HTML::Barcode - Render HTML representations of barcodes

SYNOPSIS

# HTML::Barcode::Code93 is just one example, there are others.
my $code = HTML::Barcode::Code93->new(text => 'MONKEY');
print $code->render;

See the documentation for the specific types of barcodes for detailed instructions.

DESCRIPTION

This is a base class for creating HTML representations of barcodes. Do not use it directly. If you are looking to generate a barcode, please see one of the following modules instead:

Known Types

Here are the types of barcodes you can generate with this distribution. Others may exist, so try searching CPAN.

HTML::Barcode::QRCode - Two dimensional QR codes.
HTML::Barcode::DataMatrix - Two dimensional Data Matrix barcodes.
HTML::Barcode::Code93 - Code 93 barcodes.
HTML::Barcode::Code128 - Code 128 barcodes.

Subclassing

To add a new type of barcode, create a subclass of either HTML::Barcode::1D for traditional barcodes, HTML::Barcode::2D for 2-dimensional barcodes, or HTML::Barcode if neither of those suit your needs.

Use one of the existing modules as a starting point.

Required methods for your subclass

barcode_data

You need to either override this, or override the render_barcode method so it does not use this.

This should return an arrayref of true and false values (for "on" and "off"), or an arrayref of arrayrefs (for 2D).

It is not recommended to publish this method in your API.

Other methods

Feel free to override any other methods, or use method modifiers (around, before, after) as you see fit.

METHODS

new (%attributes)

Default constructor provided by Moo, which can take values for any of the attributes.

render

This is a convenience routine which returns <style>...</style> tags and the rendered barcode.

If you are printing multiple barcodes or want to ensure your style tags are in your HTML headers, then you probably want to output the barcode and style separately with "render_barcode" and "css".

render_barcode

Returns only the rendered barcode. You will need to provide stylesheets separately, either writing them yourself or using the output of "css".

css

Returns CSS needed to properly display your rendered barcode.

ATTRIBUTES

These attributes can be passed to new, or used as accessors.

text

Required - The information to put into the barcode.

foreground_color

A CSS color value (e.g. '#000' or 'black') for the foreground. Default is '#000'.

background_color

A CSS color value background. Default is '#fff'.

bar_width

A CSS value for the width of an individual bar. Default is '2px'.

bar_height

A CSS value for the height of an individual bar. Default is '100px'.

show_text

Boolean. Indicates whether or not to render the text below the barcode.

css_class

The value for the class attribute applied to any container tags in the HTML (e.g. table or div). td tags within the table will have either css_class_on or css_class_off classes applied to them.

For example, if css_class is "barcode", you will get <table class="barcode"> and its cells will be either <td class="barcode_on"> or <td class="barcode_off">.

embed_style

Boolean. Rather than rendering CSS stylesheets, embed the style information in HTML style attributes. You should not use this option without good reason, as it greatly increases the size of the generated markup, and makes it impossible to override with stylesheets.

AUTHOR

Mark A. Stratman, <stratman@gmail.com>

SOURCE REPOSITORY

http://github.com/mstratman/HTML-Barcode

LICENSE AND COPYRIGHT

Copyright 2011 Mark A. Stratman.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.