def __init__(self, *args):
QwtPlot.__init__(self, *args)
global x, y, lineL, lineH, curveTemp
HISTORY = 300
x = 0.1 * np.arange(0, -HISTORY, -1)
y = np.zeros(HISTORY, np.float)
self.setAxisScale(QwtPlot.yLeft, 0, 100)
lineL = QwtPlotMarker()
lineL.setLinePen(QtGui.QPen(QtCore.Qt.blue))
lineL.setLabelAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignBottom)
lineL.setLineStyle(QwtPlotMarker.HLine)
lineL.setYValue(0)
lineL.attach(self)
lineH = QwtPlotMarker()
lineH.setLinePen(QtGui.QPen(QtCore.Qt.red))
lineH.setLabelAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignTop)
lineH.setLineStyle(QwtPlotMarker.HLine)
lineH.setYValue(100)
lineH.attach(self)
curveTemp = QwtPlotCurve("实时温度")
curveTemp.attach(self)
def main(args):
app = QApplication(args)
demo = QwtPlot()
grid = QwtPlotGrid()
grid.attach(demo)
grid.setPen(QPen(Qt.black, 0, Qt.DotLine))
grid.enableX(True)
grid.enableY(True)
complex_divider = 50.0
myXScale = ComplexScaleDraw(start_value=0.0, end_value=complex_divider)
#print('myXScale', myXScale)
demo.setAxisScaleDraw(QwtPlot.xBottom, myXScale)
m = QwtPlotMarker()
m.attach(demo)
m.setValue(complex_divider, 0.0)
m.setLineStyle(QwtPlotMarker.VLine)
m.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
m.setLinePen(QPen(Qt.black, 2, Qt.SolidLine))
vector_array = numpy.zeros((100, ), numpy.float32)
for i in range(100):
vector_array[i] = i
curve = QwtPlotCurve('example data')
curve.attach(demo)
x_array = numpy.zeros(100, numpy.float32)
y_array = numpy.zeros(100, numpy.float32)
for i in range(100):
x_array[i] = 1.0 * i
y_array[i] = 2.0 * i
curve.setSamples(x_array, y_array)
demo.resize(600, 400)
demo.replot()
demo.show()
# app.setMainWidget(demo)
app.exec_()
