def onSave(self, grid):#, age_data_type='site'):
        """
        Save grid data in the data object
        """
        # deselect column, including remove 'EDIT ALL' label
        if self.drop_down_menu:
            self.drop_down_menu.clean_up()

        # save all changes to er_magic data object
        self.grid_builder.save_grid_data()

        # don't actually write data in this step (time-consuming)
        # instead, write to files when user is done editing
        #self.er_magic_data.write_files()

        wx.MessageBox('Saved!', 'Info',
                      style=wx.OK | wx.ICON_INFORMATION)