def _get_index_image ( self ):
        x, y, z = self.item
        if sqrt( (x - 0.5) ** 2 + (y - 0.5) ** 2 + (z - 0.5) ** 2 ) <= 0.25:
            return 'red_flag'
        return None

#--[Tabular Editor Definition]--------------------------------------------------
dataset/ETHPy150Open enthought/traitsui/examples/tutorials/traitsui_4.0/editors/tabular_editor/numpy_array.py/ArrayAdapter._get_index_image/original