def METHOD_NAME(self, color, style=1, widthF=1.):
    """
    The color and style for ROI structure and isodose display.
    :param color:
     Color of the region. QColor type.
    :param style:
     Style of the contour line. NoPen: 0  SolidLine: 1  DashLine: 2  DotLine: 3  DashDotLine: 4  DashDotDotLine: 5
    :param widthF:
     Width of the contour line.
    :return: QPen object.
    """
    pen = QtGui.QPen(color)
    pen.setStyle(QtCore.Qt.PenStyle(style))
    pen.setWidthF(widthF)
    return pen