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Symfony widgeteket fogok ide kirakni, néhol egy icipici kis magyarázattal.

datePicker:

class datePickerWidget extends sfWidgetFormInput
{

  public function configure($options = array(), $attributes = array())
  {
    $this->addOption('ifFormat', "%Y-%m-%d");
    parent::configure($options, $attributes);
  }

  public function render($name, $value = null, $attributes = array(), $errors = array())
  {
    use_helper('Javascript', 'wtCurrency');
    $response = sfContext::getInstance()->getResponse();
    $response->addStylesheet('/sf/calendar/calendar-system.css');
    $response->addJavascript('/sf/calendar/calendar.js');
    $response->addJavascript('/sf/calendar/lang/calendar-en.js');
    $response->addJavascript('/sf/calendar/calendar-setup.js');
    $response->addJavascript(sfConfig::get('sf_prototype_web_dir').'/js/prototype');

    $picker = javascript_tag("
      Calendar.setup(
      {
        inputField  : '".$this->generateId($name)."',
        ifFormat    : '".$this->getOption('ifFormat')."',
        button      : 'trigger',    // ID of the button
      })
    ");
    return parent::render($name, $value, $attributes, $errors) . $picker;
  }
}

Autocompliter:
innen az eredeti

class sfExtraWidgetFormInputAutocomplete extends sfWidgetFormInput
{
    public function configure($options = array(), $attributes = array())
    {
        $this->addRequiredOption('url');
        $this->addOption('param', 'autocomplete');
        $this->addOption('min_chars', 2);
        $this->addOption('afterUpdateElement','');
        parent::configure($options, $attributes);
    }

    public function render($name, $value = null, $attributes = array(), $errors = array())
    {
        $response = sfContext::getInstance()->getResponse();
        $response->addJavascript(sfConfig::get('sf_prototype_web_dir').'/js/prototype');
        $response->addJavascript(sfConfig::get('sf_prototype_web_dir').'/js/scriptaculous.js');
        sfLoader::loadHelpers(array('Javascript'));
        $response->addStylesheet('/sfExtraWidgetsPlugin/css/autocompleter.css');

        $autocompleteDiv = content_tag('div' , '', array('id' => $this->generateId($name) . '_autocomplete', 'class' => 'autocomplete'));

        $autocompleteJs = javascript_tag(
            "function ac_update_" . $this->generateId($name) . "(text, li)
            {
                $('" . $this->generateId($name) . "').value = li.innerHTML;
                ".$this->getOption('afterUpdateElement')."
            }

            new Ajax.Autocompleter(
                '" . $this->generateId($name) . "',
                '" . $this->generateId($name) . '_autocomplete' . "',
                '" . url_for($this->getOption('url')) . "',
                {
                    paramName: '" . $this->getOption('param') . "',
                    indicator: 'indicator-" . $this->generateId($name) . "',
                    minChars: " . $this->getOption('min_chars') . ",
                    afterUpdateElement: ac_update_" . $this->generateId($name) . "
                });"
            );

        return parent::render($name, $value, $attributes, $errors) .
        '<span id="indicator-' . $this->generateId($name) . '" style="display: none;">&nbsp;&nbsp;<img src="/sfExtraWidgetsPlugin/img/ajax-loader.gif" align="absmiddle" alt="Loading" /></span>' .
        $autocompleteDiv .
        $autocompleteJs;
    }
}

használata:
widget:

$this->widgetSchema['nevsearch']     = new sfExtraWidgetFormInputAutocomplete(array(
            'url'=>'modul/action',
            'afterUpdateElement'=>'afterUpdateElement_nevsearch(text, li)'));
// ezt a javascript függvényt létre kell hozni.
//vagy egyszerűen az eredti módszerrel:
$this->widgetSchema['projekt']   = new sfExtraWidgetFormInputAutocomplete(array('url'=>'modul/action'));

actionSuccess.php

<ul>
  <?php foreach ($words as $value):?>
    <li id='<?php echo $value?>'><?php echo $value?></li>
  <?php endforeach?>
</ul>

checkbox

$this->widgetSchema['checkbox'] = new sfWidgetFormInputCheckbox();
$this->validatorSchema['checkbox'] = new sfValidatorPass();

checkbox rejtett false értékkel
A’ la cakephp. A lényeg hogy vizsgálhassuk a mező értékét, mert a symfonyban alapból nem jön semmi a post adatokkal, ha a checkbox nincs kiválasztva…

class sfWidgetFormInputCheckboxExtend extends sfWidgetFormInputCheckbox
{
  public function render($name, $value = null, $attributes = array(), $errors = array())
  {
    $hidden = new sfWidgetFormInputHidden();
    $hidden = $hidden->render($name, 0, array('id'=>false));

    $value = ($value == 0) ? null : $value;
    $attributes['value'] = 1;

    return $hidden.parent::render($name, $value, $attributes, $errors);
  }
}