public void actionPerformed(java.awt.event.ActionEvent event)
     {
       Object object = event.getSource();
       if ( object == downSample )
         downSample_actionPerformed(event);
       else if ( object == clear )
         clear_actionPerformed(event);
       else if ( object == add )
         add_actionPerformed(event);
       else if ( object == del )
         del_actionPerformed(event);
       else if ( object == load )
         load_actionPerformed(event);
       else if ( object == save )
         save_actionPerformed(event);
       else if ( object == train )
         train_actionPerformed(event);
       else if ( object == recognize )
         recognize_actionPerformed(event);
     }