Default options form that provides the label widget that all fields should have.
Overrides HandlerBase::buildOptionsForm
public function buildOptionsForm(&$form, &$form_state) {
parent::buildOptionsForm($form, $form_state);
if ($form_state['type'] != 'empty') {
$form['empty'] = array(
'#type' => 'checkbox',
'#title' => t('Display even if view has no result'),
'#default_value' => isset($this->options['empty']) ? $this->options['empty'] : 0,
);
}
}