code: def open_uris(self, uris, chname=None, bulk_add=False):
          if len(uris) == 0:
              return
          if chname is None:
              channel = self.get_channel_info()
              if channel is None:
                  return
              chname = channel.name
          channel = self.get_channel_on_demand(chname)
          def show_dataobj_bulk(data_obj):
              self.gui_do(channel.add_image, data_obj, bulk_add=True)
          def load_file_bulk(filepath):
              self.nongui_do(self.open_file_cont, filepath, show_dataobj_bulk)
          def show_dataobj(data_obj):
              self.gui_do(channel.add_image, data_obj, bulk_add=False)
          def load_file(filepath):
              self.nongui_do(self.open_file_cont, filepath, show_dataobj)
          if bulk_add:
              self.open_uri_cont(uris[0], load_file_bulk)
          else:
              self.open_uri_cont(uris[0], load_file)
          self.update_pending()
          for uri in uris[1:]:
              self.open_uri_cont(uri, load_file_bulk)
              self.update_pending()