code: def setup_signals(self, ):
          
          self.showfilter_tb.toggled.connect(self.switch_showfilter_icon)
          self.addnew_tb.clicked.connect(self.open_addnew_win)
          self.search_le.editingFinished.connect(self.update_filter)
          for cb in (self.loaded_checkb, self.unloaded_checkb, self.imported_checkb, self.empty_checkb,
                     self.newest_checkb, self.old_checkb, self.alien_checkb):
              cb.toggled.connect(self.update_filter)
docs: Connect the signals with the slots to make the ui functional
  
          :returns: None
          :rtype: None
          :raises: None