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  • Creating model form field in joomla

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    For creating custom form fields please use the following steps:

    Step 1:Add all the custom fields to the following XML file components/com_library/views/book/default.xml

    <fields name="request" addfieldpath="administrator/components/com_library/models/fields">
        <fieldset name="request">
            <field 
                name="id" 
                type="modal_book" 
                label="COM_LIBRARY_BOOK_FIELD_ID_LABEL" 
                description="COM_LIBRARY_BOOK_FIELD_ID_DESC"
                required="true"
            />
        </fieldset>
    </fields>
    

    Step 2: Create class with custom form field name administrator/components/com_library/models/fields/modal/book.php. // No direct access defined('_JEXEC') or die('Restricted access');

    jimport('joomla.form.formfield');

    /** * Book form field class */

    <?php class JFormFieldModal_Book extends JFormField
     {
         /**
          * field type
          * @var string
          */
         protected $type = 'Modal_Book';
    
    
     Override parent class getinput method.
     protected function getInput()
      {
            /* This function will get all the custom fields value from database and create the HTML
                and then that HTML will be passed to the view
    
            */
                 // Load modal behavior
          JHtml::_('behavior.modal', 'a.modal');
    
          // Build the script
          $script = array();
          $script[] = '    function jSelectBook_'.$this->id.'(id, title, object) {';
          $script[] = '        document.id("'.$this->id.'_id").value = id;';
          $script[] = '        document.id("'.$this->id.'_name").value = title;';
          $script[] = '        SqueezeBox.close();';
          $script[] = '    }';
    
          // Add to document head
          JFactory::getDocument()->addScriptDeclaration(implode("\n", $script));
    
          // Setup variables for display
          $html = array();
          $link = 'index.php?option=com_library&amp;view=books&amp;layout=modal'.
                      '&amp;tmpl=component&amp;function=jSelectBook_'.$this->id;
    
          $db = JFactory::getDbo();
          $query = $db->getQuery(true);
          $query->select('title');
          $query->from('#__books');
          $query->where('id='.(int)$this->value);
          $db->setQuery($query);
          if (!$title = $db->loadResult()) {
              JError::raiseWarning(500, $db->getErrorMsg());
          }
          if (empty($title)) {
              $title = JText::_('COM_LIBRARY_FIELD_SELECT_BOOK');
          }
          $title = htmlspecialchars($title, ENT_QUOTES, 'UTF-8');
    
          // The current book input field
          $html[] = '<div class="fltlft">';
          $html[] = '  <input type="text" id="'.$this->id.'_name" value="'.$title.'" disabled="disabled" size="35" />';
          $html[] = '</div>';
    
          // The book select button
          $html[] = '<div class="button2-left">';
          $html[] = '  <div class="blank">';
          $html[] = '    <a class="modal" title="'.JText::_('COM_LIBRARY_SELECT_BOOK_TITLE').'" href="'.$link.
                             '" rel="{handler: \'iframe\', size: {x:800, y:450}}">'.
                             JText::_('COM_LIBRARY_BUTTON_SELECT_BOOK').'</a>';
          $html[] = '  </div>';
          $html[] = '</div>';
    
          // The active book id field
          if (0 == (int)$this->value) {
              $value = '';
          } else {
              $value = (int)$this->value;
          }
    
          // class='required' for client side validation
          $class = '';
          if ($this->required) {
              $class = ' class="required modal-value"';
          }
    
          $html[] = '<input type="hidden" id="'.$this->id.'_id"'.$class.' name="'.$this->name.'" value="'.$value.'" />';
    
          return implode("\n", $html);
      }
    }
    

    Step 3:Create Modal layout: Create the following file /administrator/components/com_library/views/books/tmpl/modal.php.

    /

    / No direct access
     defined('_JEXEC') or die('Restricted access');
    
     // Load tooltip behavior
     JHtml::_('behavior.tooltip');
     $listOrder    = $this->escape($this->state->get('list.ordering'));
     $listDirn    = $this->escape($this->state->get('list.direction'));
    
     $function = JFactory::getApplication()->input->getCmd('function', 'jSelectBook');
    ?>
    <form action="<?php echo $this->action; ?>" method="post" name="adminForm" id="adminForm">
    <table class="adminlist">
        <thead>
            <tr>
                <th>
                    <?php echo JHtml::_('grid.sort', 'COM_LIBRARY_BOOKS_HEADING_TITLE', 'title', $listDirn, $listOrder); ?>
                </th>
                <th>
                    <?php echo JHtml::_('grid.sort', 'COM_LIBRARY_BOOKS_HEADING_STATE', 'state', $listDirn, $listOrder); ?>
                </th>
                <th>
                    <?php echo JHtml::_('grid.sort', 'COM_LIBRARY_BOOKS_HEADING_HITS', 'hits', $listDirn, $listOrder); ?>
                </th>
                <th>
                    <?php echo JHtml::_('grid.sort', 'COM_LIBRARY_BOOKS_HEADING_CREATED', 'created', $listDirn, $listOrder); ?>
                </th>
                <th>
                    <?php echo JHtml::_('grid.sort', 'COM_LIBRARY_BOOKS_HEADING_MODIFIED', 'modified', $listDirn, $listOrder); ?>
                </th>
                <th width="5">
                    <?php echo JHtml::_('grid.sort', 'COM_LIBRARY_BOOKS_HEADING_ID', 'id', $listDirn, $listOrder); ?>
                </th>
            </tr>
        </thead>
        <tfoot>
            <tr>
                <td colspan="6"><?php echo $this->pagination->getListFooter(); ?></td>
            </tr>
        </tfoot>
        <tbody>
    <?php foreach ($this->items as $i => $item) : ?>
            <tr class="row<?php echo $i % 2; ?>">
                <td>
                    <a class="pointer" onclick="if (window.parent) window.parent.<?php echo $this->escape($function);?>('<?php echo $item->id; ?>', '<?php echo $this->escape(addslashes($item->title)); ?>');"><?php echo $this->escape($item->title); ?></a>
                </td>
                <td align="center"><?php echo JHtml::_('jgrid.published', $item->state, $i, 'books.'); ?></td>
                <td align="right"><?php echo $item->hits; ?></td>
                <td align="center"><?php echo $item->created; ?></td>
                <td align="center"><?php echo $item->modified; ?></td>
                <td><?php echo $item->id; ?></td>
            </tr>
    <?php endforeach; ?>
        </tbody>
    </table>
    <div>
        <input type="hidden" name="task" value="" />
        <input type="hidden" name="boxchecked" value="0" />
        <input type="hidden" name="filter_order" value="<?php echo $listOrder; ?>" />
        <input type="hidden" name="filter_order_Dir" value="<?php echo $listDirn; ?>" />
        <?php echo JHtml::_('form.token'); ?>
    </div>
    </form>
    

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