Domizio Demichelis

NAME

Template::Magic::HTML - HTML handlers for Template::Magic used in a HTML environment

VERSION 1.39

Included in Template-Magic 1.39 distribution.

The latest versions changes are reported in the Changes file in this distribution.

SYNOPSIS

    $tm = new Template::Magic::HTML ;
    
    # that means
    $tm = new Template::Magic
              markers        => 'HTML' ,
              value_handlers => 'HTML' ;
              
    # that explicitly means
    $tm = new Template::Magic
              markers        => [ qw( <!--{ / }--> ) ],
              value_handlers => [ qw( SCALAR
                                      REF
                                      CODE
                                      TableTiler
                                      ARRAY
                                      HASH
                                      FillInForm ) ] ;

DESCRIPTION

Template::Magic::HTML is a collection of handlers for Template::Magic useful when used in a HTML environment. It adds a couple of magic HTML specific value handlers to Template::Magic default value handlers. Just create and use the object as usual, to have a trasparent interface to HTML::TableTiler and HTML::FillInForm too.

Other interesting readings about how to use this collection are in:

HTML VALUE HANDLERS

HTML

This is the shortcut for the complete HTML collection of handlers that defines the following value handlers:

    SCALAR
    REF
    CODE
    TableTiler
    ARRAY
    HASH
    FillInForm

See "standard value handlers" in Template::Magic for details about SCALAR REF CODE ARRAY and HASH handlers.

TableTiler
Condition

a bidimensional array value

Action

magic generation of HTML table. No need to create and use a HTML::TableTiler object: this handler will manage it magically.

Description

The bidimensional array:

    $matrix_generating_a_table = [ [1..3], 
                                   [4..6], 
                                   [7..9] ];

The template could be as simple as a simple label with the same identifier of the bidimensional array:

    <p>paragraph text</p>
    <!--{matrix_generating_a_table}-->
    <p>other paragraph</p>

so the output will be a generic table including the array data:

    <p>paragraph text</p>
    <table>
    <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
    <tr>
        <td>4</td>
        <td>5</td>
        <td>6</td>
    </tr>
    <tr>
        <td>7</td>
        <td>8</td>
        <td>9</td>
    </tr>
    </table>
    <p>paragraph text</p>

or the template could be a complete table Tile included in a block with the same identifier of the bidimensional array, and with the optional ROW and COL TableTiler modes, passed as label attributes:

    <p>paragraph text</p>
    <!--{matrix_generating_a_table H_TILE V_TILE}-->
    <table border="1" cellspacing="2" cellpadding="2">
    <tr>
        <td><b><i>?</i></b></td>
        <td>?</td>
    </tr>
    <tr>
        <td>?</td>
        <td><b><i>?</i></b></td>
    </tr>
    </table>
    <!--{/matrix_generating_a_table}-->
    <p>other paragraph</p>

so the output will be a complete tiled table including the array data:

    <p>paragraph text</p>
    <table border="1" cellspacing="2" cellpadding="2">
    <tr>
        <td><b><i>1</i></b></td>
        <td>2</td>
        <td><b><i>3</i></b></td>
    </tr>
    <tr>
        <td>4</td>
        <td><b><i>5</i></b></td>
        <td>6</td>
    </tr>
    <tr>
        <td><b><i>7</i></b></td>
        <td>8</td>
        <td><b><i>9</i></b></td>
    </tr>
    </table>
    <p>paragraph text</p>

See HTML::TableTiler for details about this module.

Note: if your template don't need this specific handler you can avoid its loading by explicitly omitting it:

    $tm = new Template::Magic::HTML
              value_handlers => [ qw( SCALAR
                                      REF
                                      CODE
                                      ARRAY
                                      HASH
                                      FillInForm ) ] ;

Warning: since this handler checks for a bidimensional ARRAY, it must be checked BEFORE the ARRAY value handler in order to work.

FillInForm
Condition

a CGI query object value (or by a blessed object that has a param() method)

Action

magic fill in of a HTML form with the parameter in the CGI object

Description

The CGI object in your code:

    $my_query = new CGI;

If you want to fill a form with the param in the $my_query, just transform the form into a block giving it the same identifier.

    <!--{my_query}-->
    <form action="my.cgi">
    ...
    </form>
    <!--{/my_query}-->

One useful application of this handler is when a user submits an HTML form without filling out a required field. FillInForm handler will magically redisplay the form with all the form elements (input, textarea and select tags) filled with the submitted info ($my_query), without any other statement in your code. (No need to create and use a HTML::FillInForm object: this handler will manage it magically).

You can use this handler to fill the form with default values too, To do this, just create a new query object and fill it with the default param that you want in the form:

    $query = new CGI;
    $query->param( name    => 'John',
                   surname => 'Smith', ...);

You can pass an array of ignore_fields (see HTML::FillInForm for details) by using the attributes like this:

    <!--{my_query ignore_fields => [ 'prev', 'next'] }-->
    <form action="my.cgi">
    ...
    </form>
    <!--{/my_query}-->

See HTML::FillInForm for details about this module.

Note: if your template don't need this specific handler you can avoid its loading by explicitly omitting it:

    $tm = new Template::Magic::HTML
              value_handlers => [ qw( SCALAR
                                      REF
                                      CODE
                                      TableTiler
                                      ARRAY
                                      HASH ) ] ;

SEE ALSO

SUPPORT

Support for all the modules of the Template Magic System is via the mailing list. The list is used for general support on the use of the Template::Magic, announcements, bug reports, patches, suggestions for improvements or new features. The API to the Magic Template System is stable, but if you use it in a production environment, it's probably a good idea to keep a watch on the list.

You can join the Template Magic System mailing list at this url:

http://lists.sourceforge.net/lists/listinfo/template-magic-users

AUTHOR and COPYRIGHT

© 2004-2005 by Domizio Demichelis (http://perl.4pro.net)

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

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