code: def on_reset_button(self, _):
          
          for graph in self.visible_graphs.values():
              graph.reset()
          for graph in self.graphs.values():
              try:
                  graph.source.reset()
              except NotImplementedError:
                  pass
          # Reset clock
          self.clock_view.set_text(ZERO_TIME)
  
          self.update_displayed_information()
docs: Reset graph data and display empty graph