There is a nice little feature when you add form fields to the system configuration where you can use:


This will add a class to your <input> form field which is useful for all sorts of things. Is there a method to do the same when declaring a widget parameter in widget.xml?

1 Answer 1


I scoured through Magento source, and I did not find where an additional value would be set in widget.xml. While it's a bit annoying, I resorted to using my own <type>.

My widget.xml contains:

<my_param translate="label">
    <label>My Label</label>

The annoying part is that my block class only contains:

class Module_Name_Block_My_Custom_Block extends Mage_Adminhtml_Block_Widget_Form_Renderer_Fieldset_Element
    public function render(Varien_Data_Form_Element_Abstract $element)
        $this->_element = $element;
        return $this->toHtml();
  • Old old question, but I ran into this recently. I didn't find a way to do this and your solution seems like the only proper way to go about it. However, there IS the setFrameTags($open, $close = null) method. Which would technically make it possible to do something like setFrameTags('input class="foo"') but it's nasty.
    – Rian
    Commented May 29, 2018 at 13:58

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