ccspecan.py 文件源码

def _draw_graph(self):
        if self._graph is None:
            self._new_graph()
        elif self._graph.size() != self.size():
            self._new_graph()

        painter = QtGui.QPainter(self._graph)
        try:
            painter.setRenderHint(QtGui.QPainter.Antialiasing)
            painter.fillRect(0, 0, self._graph.width(), self._graph.height(), QtGui.QColor(0, 0, 0, 10))

            if self._frame:
                frequency_axis, rssi_values = self._frame

                path_now = QtGui.QPainterPath()
                path_max = QtGui.QPainterPath()

                bins = range(len(frequency_axis))
                x_axis = self._hz_to_x(frequency_axis)
                y_now = self._dbm_to_y(rssi_values)
                y_max = self._dbm_to_y(numpy.amax(self._persisted_frames, axis=0))

                # TODO: Wrapped Numpy types with float() to support old (<1.0) PySide API in Ubuntu 10.10
                path_now.moveTo(float(x_axis[0]), float(y_now[0]))
                for i in bins:
                    path_now.lineTo(float(x_axis[i]), float(y_now[i]))

                # TODO: Wrapped Numpy types with float() to support old (<1.0) PySide API in Ubuntu 10.10
                path_max.moveTo(float(x_axis[0]), float(y_max[0]))
                for i in bins:
                    path_max.lineTo(float(x_axis[i]), float(y_max[i]))

                painter.setPen(Qt.white)
                painter.drawPath(path_now)
                self._path_max = path_max
        finally:
            painter.end()