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NAME
    Business::TW::Invoice::U420 - Print Taiwan Unified Invoice with U420
    printer

VERSION
    Version 0.01

SYNOPSIS
    Business::TW::Invoice::U420->init_printer; my $u420 =
    Business::TW::U420->new ({ heading => [ DateTime->now->ymd, '', 'order:
    #232', ''], lines_total => 35, lines_available => 18, lines_stamp => 5,
    fh => \*STDOUT });

    $u420->println("123123") for 1..30; $u420->cut;

    # to actually print to the printer, run: # perl your-program.pl > COM1

DESCRIPTION
    This module generates commands for the "Epson RP-U420 invoice" printer
    for printing the Unified Invoice in Taiwan.

    You must install the driver and printer processor properly before you
    can use the module.

    You can define multiple lines of headers that will appear on each page
    of the printed invoices, and when you do println the module does all the
    necessary paging and stamping for you.

METHODS
  new
  init_printer
  feed( $lines )
    Feed $lines lines, default is 1.

  stamp
    Make the printer stamp on the invoice. note that you generally don't
    want to call this method directly, due to the stamp positioning. When
    you call "cut", the module automatically detects the correct place to
    stamp for the next invoice.

  cut
    feed the current invoice and cut, as well as stamping on the next
    invoice.

  print
    Low level print function.

  println
    Print a line on the invoice. Does all the paging logic here.

AUTHOR
    Chia-liang Kao, "<clkao at clkao.org>"

  TODO
    *   Split the device control parts into "Device::Serial::U420" for
        generic use and keep the paging/stamping logic here

    *   Tests

    *   Add footer support

BUGS
    Please report any bugs or feature requests to
    "bug-business-tw-invoice-u420 at rt.cpan.org", or through the web
    interface at
    <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Business-TW-Invoice-U420
    >. I will be notified, and then you'll automatically be notified of
    progress on your bug as I make changes.

SUPPORT
    You can find documentation for this module with the perldoc command.

        perldoc Business::TW::Invoice::U420

    You can also look for information at:

    * AnnoCPAN: Annotated CPAN documentation
        <http://annocpan.org/dist/Business-TW-Invoice-U420>

    * CPAN Ratings
        <http://cpanratings.perl.org/d/Business-TW-Invoice-U420>

    * RT: CPAN's request tracker
        <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Business-TW-Invoice-U420>

    * Search CPAN
        <http://search.cpan.org/dist/Business-TW-Invoice-U420>

ACKNOWLEDGEMENTS
COPYRIGHT & LICENSE
    Copyright 2007 AIINK co., ltd, all rights reserved.

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