polygonwidget.py 文件源码

def createPath(self):

        self.path = QPainterPath()
        angle = 2*math.pi/self._sides
        self.path.moveTo(self._outerRadius, 0)
        for step in range(1, self._sides + 1):
            self.path.lineTo(
                self._innerRadius * math.cos((step - 0.5) * angle),
                self._innerRadius * math.sin((step - 0.5) * angle)
                )
            self.path.lineTo(
                self._outerRadius * math.cos(step * angle),
                self._outerRadius * math.sin(step * angle)
                )
        self.path.closeSubpath()