Creates a new spreadsheet. Expects code_array in event.

def new(self, event):
        """Creates a new spreadsheet. Expects code_array in event."""

        # Grid table handles interaction to code_array

        self.grid.actions.clear(event.shape)

        _grid_table = GridTable(self.grid, self.grid.code_array)
        self.grid.SetTable(_grid_table, True)

        # Update toolbars
        self.grid.update_entry_line()
        self.grid.update_attribute_toolbar()