arrow.py 文件源码

def __init__(self, startp=Point(), endp=None,
                 length=60.0, angle=50.0,
                 color=QtCore.Qt.red, pencolor=QtCore.Qt.green,
                 startarrow=True):
        """
        Initialisation of the class.
        """
        self.sc = None
        super(Arrow, self).__init__()

        self.startp = QtCore.QPointF(startp.x, -startp.y)
        self.endp = endp

        self.length = length
        self.angle = angle
        self.startarrow = startarrow
        self.allwaysshow = False

        self.arrowHead = QPolygonF()
        self.setFlag(QGraphicsItem.ItemIsSelectable, False)
        self.myColor = color
        self.pen = QPen(pencolor, 1, QtCore.Qt.SolidLine)
        self.pen.setCosmetic(True)
        self.arrowSize = 8.0