/ 
Data-Pageset-Render-0.14
++
 / Data::Pageset::Render
Mark Grimes
and 1 contributors

NAME

Data::Pageset::Render - Subclass of Data::Pageset that generates html, text, etc. for page navigation

SYNOPSIS

  ### In the Controller part of you MVC
  # Create the pager as you would normally with Data::Pageset
  use Data::Pageset::Render;
  my $pager = Data::Pageset::Render->new( {
        total_entries    => 100,
        entries_per_page => 10,
        current_page     => 1,
        pages_per_set    => 5,
        mode             => 'slider',

        link_format      => '<a href="q?page=%p">%a</a>',
  } );

  ### In the view part of your MVC
  my $text = $pager->html;
  # $text is html "<< 1 ... 3 4 5 6 7 ... 10 >>" with appropriate links

  ### Or As part of larger framework
  # In a TT template:
  [% pager.html() %]
  # In a Mason template:
  <% $pager->html() %>

  ### For a bit more control over the appearence of the current page:
  my $pager = Data::Pageset::Render->new( {
        total_entries    => 100,
        entries_per_page => 10,
        current_page     => 1,
        pages_per_set    => 5,
        mode             => 'slider',

        link_format         => '<a href="q?page=%p">%a</a>',
        current_page_format => '[%a]',
  } );
  my $text = $pager->html();
  # $text is html "<< 1 ... 3 4 [5] 6 7 ... 10 >>" with appropriate links
=head1 DESCRIPTION

Data::Pageset::Render inherits from Data::Pageset and adds the html method which renders a pager, complete with links, in html. The constructor take two additional optional configuration parameters, and all of Data::Pagesets methods continue to function as normal.

METHODS

new()

Data::Pageset::Render adds the link_format and current_page_format configuration options to Data::Pageset. See the html method for more information on these options.

html()
html( $link_format, $current_page_format )
  my $text = $pager->html();
  my $text = $pager->html( '<a href="q?page=%p">%a</a>' );
  my $text = $pager->html( '<a href="q?page=%p">%a</a>', '[%a]' );

Produces the text necessary to implement page navigation. Most often this will be used to create a links to pages within your web app. The two special character codes %p and %a will be substituted with the page number and the link text, respectively. %a will usually also be the page number, but sometimes it could be "<<", ">>", or "...".

Rather than code this in TT or Mason or (even worse) by hand, Data::Pageset::Render replaces all of this:

    ## TT template:
    [% IF pager.current_page > 1 %]
        <a href="display?page=[% pager.current_page - 1 %]">&lt;&lt;</a>
    [% END %]
    [% FOREACH num = [pager.first_page .. pager.last_page] %]
    [% IF num == pager.current_page %][[% num %]]
    [% ELSE %]<a href="display?page=[% num %]">[[% num %]]</a>[% END %]
    [% END %]
    [% IF pager.current_page < pager.last_page %]
        <a href="display?page=[% pager.last_page %]">&gt;&gt;</a>
    [% END %]

with this:

    [% pager.html() %]

And you get even more goodness from Data::Pageset limiting the pages displayed to something reasonable if you are dealing with a large number of pages.

        $pager->link_format( '<a href="q?page=%p">%a</a>' );

Accessor for the link_format setting.

current_page_format()
        $pager->current_page_format->current_page_format => '[%a]' );

Accessor for the current_page_format setting.

TODO

In this release, there is limited ability to customize the page navigation. I plan to add the ability to customize the following:

  • Option to not display the first/last pages if they aren't part of current page set

  • Option to not display the link to the prior/next page set (assuming it exists)

  • Ability to customize the look of "move back/forward" links (currently only << and >> are supported) or turn them off completely

  • Ability to customize the look of the prior/next page sets (currently only "..." is supported)

  • Ability to specify the separators between links (ie, enable "1 | 2 | 3 | 4" type pagers)

  • Add class to particular page link. Show << without a link if on page 1, etc.

This module is a work in progress and suggestions are welcome.

SEE ALSO

Data::Pageset, Class::DBI::Pageset, Data::Page

BUGS

Please report any bugs or suggestions at http://rt.cpan.org/NoAuth/Bugs.html?Dist=Data-Pageset-HTML

AUTHOR

Mark Grimes, <mgrimes@cpan.org>

COPYRIGHT AND LICENSE

Copyright (C) 2008 by Mark Grimes

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.2 or, at your option, any later version of Perl 5 you may have available.