def create_plot( self ): plot = Qwt.QwtPlot(self) plot.setCanvasBackground(Qt.black) plot.setAxisTitle(Qwt.QwtPlot.xBottom, 'Time') plot.enableAxis( Qwt.QwtPlot.yLeft, True ) zoomer = Qwt.QwtPlotMagnifier( plot.canvas() ) zoomer.setAxisEnabled(Qwt.QwtPlot.xBottom,False ) self.plot = plot return plot