The default backend fieldset element renderer

dmitry_fedyuk (Dmitrii Fediuk) November 21, 2015, 5:06pm 1

If a form element is inside a fieldset, then the default renderer class is \Magento\Backend\Block\Widget\Form\Renderer\Fieldset\Element and the default template is Magento/Backend/view/adminhtml/templates/widget/form/renderer/fieldset/element.phtml.

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Backend/Block/Widget/Form.php#L70-L75


\Magento\Framework\Data\Form::setFieldsetElementRenderer(
    $this->getLayout()->createBlock(
        'Magento\Backend\Block\Widget\Form\Renderer\Fieldset\Element',
        $this->getNameInLayout() . '_fieldset_element'
    )
);

github.com

magento/magento2/blob/2.0.0/lib/internal/Magento/Framework/Data/Form/Element/Fieldset.php#L212-L214


if ($renderer = Form::getFieldsetElementRenderer()) {
    $element->setRenderer($renderer);
}

It is different from the fields outside a fieldset: The default backend form element renderer.