'Cell content'

def data(self, index, role=Qt.DisplayRole):

    if (not index.isValid()):
        return to_qvariant()
    value = self.get_value(index)
    if is_binary_string(value):
        try:
            value = to_text_string(value, 'utf8')
        except:
            pass
    if (role == Qt.DisplayRole):
        if (value is np.ma.masked):
            return ''
        else:
            return to_qvariant((self._format % value))
    elif (role == Qt.TextAlignmentRole):
        return to_qvariant(int((Qt.AlignCenter | Qt.AlignVCenter)))
    elif ((role == Qt.BackgroundColorRole) and self.bgcolor_enabled and (value is not np.ma.masked)):
        hue = (self.hue0 + ((self.dhue * (float(self.vmax) - self.color_func(value))) / (float(self.vmax) - self.vmin)))
        hue = float(np.abs(hue))
        color = QColor.fromHsvF(hue, self.sat, self.val, self.alp)
        return to_qvariant(color)
    elif (role == Qt.FontRole):
        return to_qvariant(get_font(font_size_delta=DEFAULT_SMALL_DELTA))
    return to_qvariant()
