code: def OnToggleFullscreen(self, event):
          
  
          is_full_screen = self.main_window.IsFullScreen()
  
          # Make sure that only the grid is shown in fullscreen mode
          if is_full_screen:
              try:
                  self.main_window.grid.SetRowLabelSize(self.row_label_size)
                  self.main_window.grid.SetColLabelSize(self.col_label_size)
              except AttributeError:
                  pass
  
              # Restore toolbars from before fullscreen mode
              try:
                  self.main_window._mgr.LoadPerspective(self.aui_windowed)
              except AttributeError:
                  pass
  
          else:
              # Save the perspective of the AUI manager
              self.aui_windowed = self.main_window._mgr.SavePerspective()
  
              # Hide toolbars
              for pane in self.main_window._mgr.GetAllPanes():
                  if pane.name != "grid":
                      pane.Hide()
  
              self.main_window._mgr.Update()
  
              self.row_label_size = self.main_window.grid.GetRowLabelSize()
              self.col_label_size = self.main_window.grid.GetColLabelSize()
  
              self.main_window.grid.SetRowLabelSize(0)
              self.main_window.grid.SetColLabelSize(0)
  
          self.main_window.ShowFullScreen(not is_full_screen)
docs: Fullscreen event handler