def __init__(self):
super().__init__()
self.setAutoFillBackground(True)
self.setPalette(QPalette(QColor(165, 193, 228)))
self.updateGradient()
self.setTitle("A Simple QwtPlot Demonstration")
self.insertLegend(Qwt.QwtLegend(), Qwt.QwtPlot.RightLegend)
#axes
self.setAxisTitle(Qwt.QwtPlot.xBottom, "x -->")
self.setAxisScale(Qwt.QwtPlot.xBottom, 0.0, 10.0)
self.setAxisTitle(Qwt.QwtPlot.yLeft, "y -->")
self.setAxisScale(Qwt.QwtPlot.yLeft, -1.0, 1.0)
# canvas
self.canvas = Qwt.QwtPlotCanvas()
self.canvas.setLineWidth(1)
self.canvas.setFrameStyle(QFrame.Box | QFrame.Plain)
self.canvas.setBorderRadius(15)
self.canvasPalette = QPalette(Qt.white)
self.canvasPalette.setColor(QPalette.Foreground, QColor(133, 190, 232))
self.canvas.setPalette(self.canvasPalette)
self.setCanvas(self.canvas)
#panning with the left mouse button
self.panner = Qwt.QwtPlotPanner(self.canvas)
#zoom in/out with the wheel
self.magnifier = Qwt.QwtPlotMagnifier(self.canvas)
self.magnifier.setMouseButton(Qt.NoButton)
self.populate()
def __init__(self, parent=None):
Qwt.QwtPlot.__init__(self, parent)
self.setTitle("Watching TV during a weekend")
canvas = Qwt.QwtPlotCanvas()
canvas.setPalette(QPalette(Qt.gray))
canvas.setBorderRadius(10)
self.setCanvas(canvas)
self.plotLayout().setAlignCanvasToScales(True)
self.setAxisTitle(Qwt.QwtPlot.yLeft, "Number of People")
self.setAxisTitle(Qwt.QwtPlot.xBottom, "Number of Hours")
legend = Qwt.QwtLegend()
legend.setDefaultItemMode(Qwt.QwtLegendData.Checkable)
self.insertLegend(legend, Qwt.QwtPlot.RightLegend)
self.populate()
#connect( legend, SIGNAL( checked( const QVariant &, bool, int ) ), SLOT( showItem( const QVariant &, bool ) ) );
legend.checked['QVariant', 'bool', 'int'].connect(self.showItem)
self.replot() # creating the legend items
self.items = self.itemList(Qwt.QwtPlotItem.Rtti_PlotHistogram)
for i in range(len(self.items)):
if (i == 0):
#const QVariant
itemInfo = self.itemToInfo(self.items[i])
#QwtLegendLabel *
legendLabel = legend.legendWidget(itemInfo)
if (legendLabel):
legendLabel.setChecked(True)
self.items[i].setVisible(True)
else:
self.items[i].setVisible(False)
self.setAutoReplot(True)
def __init__(self, parent=None):
Qwt.QwtPlot.__init__(self, parent)
self.setAutoReplot(False)
self.setTitle("Frequency Response of a Second-Order System")
canvas = Qwt.QwtPlotCanvas()
canvas.setBorderRadius(10)
self.setCanvas(canvas)
self.setCanvasBackground(QColor("MidnightBlue"))
# legend
legend = Qwt.QwtLegend()
self.insertLegend(legend, Qwt.QwtPlot.BottomLegend)
# grid
grid = Qwt.QwtPlotGrid()
grid.enableXMin(True)
grid.setMajorPen(Qt.white, 0, Qt.DotLine)
grid.setMinorPen(Qt.gray, 0, Qt.DotLine)
grid.attach(self)
# axes
self.enableAxis(Qwt.QwtPlot.yRight)
self.setAxisTitle(Qwt.QwtPlot.xBottom, "Normalized Frequency")
self.setAxisTitle(Qwt.QwtPlot.yLeft, "Amplitude [dB]")
self.setAxisTitle(Qwt.QwtPlot.yRight, "Phase [deg]")
self.setAxisMaxMajor(Qwt.QwtPlot.xBottom, 6)
self.setAxisMaxMinor(Qwt.QwtPlot.xBottom, 9)
self.setAxisScaleEngine(Qwt.QwtPlot.xBottom, Qwt.QwtLogScaleEngine())
# curves
self.d_curve1 = Qwt.QwtPlotCurve("Amplitude")
self.d_curve1.setRenderHint(Qwt.QwtPlotItem.RenderAntialiased)
self.d_curve1.setPen(Qt.yellow)
self.d_curve1.setLegendAttribute(Qwt.QwtPlotCurve.LegendShowLine)
self.d_curve1.setYAxis(Qwt.QwtPlot.yLeft)
self.d_curve1.attach(self)
self.d_curve2 = Qwt.QwtPlotCurve("Phase")
self.d_curve2.setRenderHint(Qwt.QwtPlotItem.RenderAntialiased)
self.d_curve2.setPen(Qt.cyan)
self.d_curve2.setLegendAttribute(Qwt.QwtPlotCurve.LegendShowLine)
self.d_curve2.setYAxis(Qwt.QwtPlot.yRight)
self.d_curve2.attach(self)
# marker
self.d_marker1 = Qwt.QwtPlotMarker()
self.d_marker1.setValue(0.0, 0.0)
self.d_marker1.setLineStyle(Qwt.QwtPlotMarker.VLine)
self.d_marker1.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
self.d_marker1.setLinePen(Qt.green, 0, Qt.DashDotLine)
self.d_marker1.attach(self)
self.d_marker2 = Qwt.QwtPlotMarker()
self.d_marker2.setLineStyle(Qwt.QwtPlotMarker.HLine)
self.d_marker2.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
self.d_marker2.setLinePen(QColor(200, 150, 0), 0, Qt.DashDotLine)
self.d_marker2.setSymbol(
Qwt.QwtSymbol(Qwt.QwtSymbol.Diamond, QColor(Qt.yellow),
QColor(Qt.green), QSize(8, 8)))
self.d_marker2.attach(self)
self.setDamp(0)
self.setAutoReplot(True)