DetailView

public function getWidgets()
{
$userPrivilegesModel = Users_Privileges_Model::getCurrentUserPrivilegesModel();
$widgetLinks = parent::getWidgets();
$widgets = array();

 $widgets[] = array(
    'linktype' => 'DETAILVIEWWIDGET',
     'linklabel' => 'LBL_GRAFICO_FIDO',
     'linkName' => 'GraficoFido',
     'linkurl' => 'module=Accounts&view=Detail&record='.$this->getRecord()->getId().'&mode=showGraficoFido',
     'action'   =>  array(),
     'actionURL' => ''
 );

 foreach ($widgets as $widgetDetails) {
     $widgetLinks[] = Vtiger_Link_Model::getInstanceFromValues($widgetDetails);
 }

 return $widgetLinks;

}