def __incrementInterval(self):
self.__d_interval = Qwt.QwtInterval( self.__d_interval.maxValue(),
self.__d_interval.maxValue() + self.__d_interval.width() )
curveData = self.__d_curve.data()
curveData.values().clearStaleValues( self.__d_interval.minValue() )
#To avoid, that the grid is jumping, we disable
#the autocalculation of the ticks and shift them
#manually instead.
scaleDiv = self.axisScaleDiv( Qwt.QwtPlot.xBottom )
scaleDiv.setInterval( self.__d_interval )
for i in range( 0, Qwt.QwtScaleDiv.NTickTypes):
ticks = scaleDiv.ticks( i )
for j in range(0 , len(ticks)):
ticks[j] += self.__d_interval.width()
scaleDiv.setTicks( i, ticks )
self.setAxisScaleDiv( Qwt.QwtPlot.xBottom, scaleDiv )
self.__d_origin.setValue( self.__d_interval.minValue() + self.__d_interval.width() / 2.0, 0.0 )
self.__d_paintedPoints = 0
self.replot()
def setValues(self, values):
numValues = len(values)
#QVector<QwtIntervalSample> samples( numValues )
samples = []
for i in range(numValues):
interval = Qwt.QwtInterval(i, i + 1.0)
interval.setBorderFlags(Qwt.QwtInterval.ExcludeMaximum)
samples.append(Qwt.QwtIntervalSample(values[i], interval))
self.setSamples(samples)
def __init__(self,parent):
super().__init__(parent)
self.__d_interval = Qwt.QwtInterval( 0.0, 10.0 )
self.__d_timerId = -1
self.__d_directPainter = Qwt.QwtPlotDirectPainter()
self.__d_clock = Qwt.QwtSystemClock()
self.__d_paintedPoints = 0
self.setAutoReplot( False )
self.setCanvas( Canvas() )
self.plotLayout().setAlignCanvasToScales( True )
self.setAxisTitle( Qwt.QwtPlot.xBottom, "Time [s]" )
self.setAxisScale( Qwt.QwtPlot.xBottom, self.__d_interval.minValue(), self.__d_interval.maxValue() )
self.setAxisScale( Qwt.QwtPlot.yLeft, -200.0, 200.0 )
self.grid = Qwt.QwtPlotGrid()
self.grid.setPen( Qt.gray, 0.0, Qt.DotLine )
self.grid.enableX( True )
self.grid.enableXMin( True )
self.grid.enableY( True )
self.grid.enableYMin( False )
self.grid.attach( self )
self.__d_origin = Qwt.QwtPlotMarker()
self.__d_origin.setLineStyle( Qwt.QwtPlotMarker.Cross )
self.__d_origin.setValue( self.__d_interval.minValue() + self.__d_interval.width() / 2.0, 0.0 )
self.__d_origin.setLinePen( Qt.gray, 0.0, Qt.DashLine )
self.__d_origin.attach( self )
self.__d_curve = Qwt.QwtPlotCurve()
self.__d_curve.setStyle( Qwt.QwtPlotCurve.Lines )
self.__d_curve.setPen( self.canvas().palette().color( QPalette.WindowText ) )
self.__d_curve.setRenderHint( Qwt.QwtPlotItem.RenderAntialiased, True )
self.__d_curve.setPaintAttribute( Qwt.QwtPlotCurve.ClipPolygons, False )
self.__cdata = CurveData()
self.__d_curve.setData( self.__cdata )
self.__d_curve.attach( self )