/**
  * Adds elements from the model to the bridge that creates the form.
  *
  * Overrule this function to add different elements to the browse table, without
  * having to recode the core table building code.
  *
  * @param \MUtil_Model_Bridge_FormBridgeInterface $bridge
  * @param \MUtil_Model_ModelAbstract $model
  */
 protected function addFormElements(\MUtil_Model_Bridge_FormBridgeInterface $bridge, \MUtil_Model_ModelAbstract $model)
 {
     if (!$this->createData) {
         $bridge->addHidden('gtr_id_track');
     }
     $bridge->addText('gtr_track_name');
     // gtr_track_class
     if ($this->trackEngine) {
         $options = $model->get('gtr_track_class', 'multiOptions');
         $alternatives = $this->trackEngine->getConversionTargets($options);
         if (count($alternatives) > 1) {
             $options = $alternatives;
             $bridge->addHidden($this->_oldClassName);
             if (!isset($this->formData[$this->_oldClassName])) {
                 $this->formData[$this->_oldClassName] = $this->formData['gtr_track_class'];
             }
             $classEdit = true;
         } else {
             $classEdit = false;
         }
     } else {
         $tracker = $this->loader->getTracker();
         $options = $tracker->getTrackEngineList(true, true);
         $classEdit = true;
     }
     $model->set('gtr_track_class', 'multiOptions', $options, 'escape', false);
     if ($classEdit) {
         $bridge->addRadio('gtr_track_class');
     } else {
         $bridge->addExhibitor('gtr_track_class');
     }
     $bridge->addDate('gtr_date_start');
     $bridge->addDate('gtr_date_until');
     if (!$this->createData) {
         $bridge->addCheckbox('gtr_active');
     }
     if ($model->has('gtr_code')) {
         $bridge->addText('gtr_code');
     }
     if ($model->has('gtr_calculation_event', 'label')) {
         $bridge->add('gtr_calculation_event');
     }
     if ($model->has('gtr_completed_event', 'label')) {
         $bridge->add('gtr_completed_event');
     }
     if ($model->has('gtr_beforefieldupdate_event', 'label')) {
         $bridge->add('gtr_beforefieldupdate_event');
     }
     if ($model->has('gtr_fieldupdate_event', 'label')) {
         $bridge->add('gtr_fieldupdate_event');
     }
     $bridge->add('gtr_organizations');
     if (\MUtil_Bootstrap::enabled()) {
         $element = new \MUtil_Bootstrap_Form_Element_ToggleCheckboxes('toggleOrg', array('selector' => 'input[name^=gtr_organizations]'));
     } else {
         $element = new \Gems_JQuery_Form_Element_ToggleCheckboxes('toggleOrg', array('selector' => 'input[name^=gtr_organizations]'));
     }
     $element->setLabel($this->_('Toggle'));
     $bridge->addElement($element);
 }