code: def update_evt_types(self):
          
          self.event_types = self.parent.notes.annot.event_types
          self.idx_evt_type.clear()
          self.frequency['norm_evt_type'].clear()
          for ev in self.event_types:
              self.idx_evt_type.addItem(ev)
              self.frequency['norm_evt_type'].addItem(ev)
docs: Update the event types list when dialog is opened.