Xataface Forums

Hi,

Is it possible to work with the edit form in delegate classes functions ?
I would like to add a advmultiselect widget in the edit form when a checkbox is clicked, but I don't know if it is possible de modify this form in the delegate class.

Thank in advance

PS: I managed to add elements in actions/edit.php but I want to try without modify Xataface files

There are a number of blocks and slots that are available on the edit form. including:

after_{fieldname}_widget
before_{fieldname}_widget


To see the full list, you can turn debug mode on in the conf.ini file (debug=1).

Then you can add whatever you want after or before any of the fields.

You can also play games with showing and hiding fields by just adding a little bit of javascript to your pages and registering onchange or onclick events to your widgets.

There should be plenty of flexibility without needing to change any xataface files.

Thank you for your answer.

OK I didn't know there were blocks in forms.
But which method do I use to add widgets ?

I thought about something like:

Code: Select all

$edit_form =& // the edit_form object
$edit_form->addElement('myelement', '', ...)


Is it correct ?

The blocks won't give you access directly to the HTML_QuickForm object. Rather it allows you to place html output to any place you like.

I would break this problem down into 2 parts.

1. Add the extra fields to the form.
2. Add interactivity to hide and show fields based on user interaction.

To add fields to the form that don't correspond to a field in the database you can just add a transient field via the fields.ini file.
e.g.

Code: Select all

[myfield]
    transient=1
    widget:type=advselect
    ...


The transient=1 tells xataface that, despite the fact that this field definition doesn't correspond with a field in the database, you would still like it to appear in your forms.


Then use blocks to add your javascript interaction.

OK Steve thank you.

But I don't manage to add the "onclick" attribute to my checkbox field (knowing that this is a transient field, with a relationship).
I tried:

Code: Select all

widget:atts:onclick = "MyFunction();"

but nothing happens.

With checkbox groups the widget:atts directive doesn't work unfortunately. However there's nothing stopping you from inserting your own javascript to add handlers using javascript code to the checkboxes that you want. Using jquery it is quite easy to add events and handlers to just about any part of the page.

Maybe someone will be interested in the solution I used:

First, in order to use the PEAR Quickform tool:

table delegate class:

Code: Select all

private $formulaire;
       
function __construct()
{
    require_once('HTML/Quickform.php');
    $this->formulaire = new HTML_Quickform();
}


Then, the code used to add a block in the form:

Code: Select all

function block__after_poste_widget()
{
   
   $app =& Dataface_Application::getInstance(); 
   /*
   var_dump($app->currentRecord);
   exit();
   */
   $this->formulaire->addElement('advmultiselect', 'test', 'Pièces concernées');
   $this->formulaire->display();
   
   echo <<<EOF
   <script>
      $("input[name='poste[id=47]']").click(function()
                                    {
                                       ajoutListePieces(47);
                                    });
      
      
      function ajoutListePieces(poste)
      {
         $.getJSON(DATAFACE_SITE_HREF, { "-action":"pieces", "poste":escape(poste) }, function(data) {controleListePieces(data);});
      }
         
      function controleListePieces(data)
      {
         for ( var i=0; i<data.length; i++)
         {
            $("#__pieces").addOption(data[i][0], data[i][1]);
         }
      }
   </script>
EOF;
   
}


The javascript/ajax functions are used to call a list of options, via a xataface action.

Code: Select all

class actions_pieces
{
   function handle(&$params)
   {
      $poste = htmlentities($_GET['poste']);   
      $sql = "select id, codearticle from article LIMIT 0, 10";
      
      $res = mysql_query($sql, df_db());
      if ( !$res ) trigger_error(mysql_error(df_db()), E_USER_ERROR);
      $tableau = array();

      while ($r = mysql_fetch_array($res))
      {
         $tableau[] = array($r['id'], $r['codearticle']);
      }
   
      import('Services/JSON.php');
      $json =& new Services_JSON(); // A JSON encoder to allow us to easily
      // convert PHP arrays to javascript arrays.
      echo $json->encode($tableau);
   }
}


The code is not finished yet, but I hope it will help someone.