code: def reset(self):
          
          self.filename = None
          self.dataset = None
  
          # about the recordings
          self.idx_filename.setText('Open Recordings...')
          self.idx_s_freq.setText('')
          self.idx_n_chan.setText('')
          self.idx_start_time.setText('')
          self.idx_end_time.setText('')
  
          # about the visualization
          self.idx_scaling.setText('')
          self.idx_distance.setText('')
          self.idx_length.setText('')
          self.idx_start.setText('')
docs: Reset widget to original state.