def create_plot(self):
"""
Purpose: create the pythonqwt plot
Return: return a list containing the plot and the list of the curves
"""
plot = Qwt.QwtPlot(self)
plot.setCanvasBackground(Qt.black)
plot.setAxisTitle(Qwt.QwtPlot.xBottom, 'Time')
plot.setAxisScale(Qwt.QwtPlot.xBottom, 0, 10, 1)
plot.setAxisTitle(Qwt.QwtPlot.yLeft, 'Temperature')
plot.setAxisScale(Qwt.QwtPlot.yLeft, LeftYMIN, LeftYMAX,
(LeftYMAX - LeftYMIN) / 5)
plot.setAxisTitle(Qwt.QwtPlot.yRight, 'Humidity')
plot.setAxisScale(Qwt.QwtPlot.yRight, RightYMIN, RightYMAX,
(RightYMAX - RightYMIN) / 5)
plot.replot()
curve = [None] * 3
pen = [
QPen(QColor('red')),
QPen(QColor('green')),
QPen(QColor('blue'))
]
for i in range(3):
curve[i] = Qwt.QwtPlotCurve('')
curve[i].setRenderHint(Qwt.QwtPlotItem.RenderAntialiased)
pen[i].setWidth(2)
curve[i].setPen(pen[i])
curve[i].attach(plot)
return plot, curve
def create_plot(self):
"""
Purpose: create the pyqwt plot
Return: return a list containing the plot and the list of the curves
"""
plot = Qwt.QwtPlot(self)
plot.setCanvasBackground(Qt.black)
plot.setAxisTitle(Qwt.QwtPlot.xBottom, 'Time [s]')
plot.setAxisScale(Qwt.QwtPlot.xBottom, 0, 100, 5)
plot.setAxisTitle(Qwt.QwtPlot.yLeft, 'Concentration [ppm]')
plot.setAxisScale(Qwt.QwtPlot.yLeft, YMIN, YMAX, (YMAX-YMIN)/10)
plot.replot()
curve = [None]*3
pen = [QPen(QColor('limegreen')), QPen(QColor('red')) ,QPen(QColor('blue')) ]
for i in range(3):
curve[i] = Qwt.QwtPlotCurve('')
curve[i].setRenderHint(Qwt.QwtPlotItem.RenderAntialiased)
pen[i].setWidth(2)
curve[i].setPen(pen[i])
curve[i].attach(plot)
return plot, curve
#---------------------------------------------------
# def create_knob(self):
"""
def __init__(self, parent=None):
super(PlottingDataMonitor, self).__init__(parent)
self.monitor_active = False
self.com_monitor = None
self.livefeed = LiveDataFeed()
self.temperature_samples = []
self.timer = QTimer()
# menu
#
self.file_menu = self.menuBar().addMenu("&File")
selectport_action = QAction('Select TTY &Port...', self)
selectport_action.triggered.connect(self.on_select_port)
self.file_menu.addAction(selectport_action)
self.start_action = QAction('&Start monitor')
self.start_action.triggered.connect(self.on_start)
self.start_action.setEnabled(False)
self.file_menu.addAction(self.start_action)
self.stop_action = QAction('&Stop monitor')
self.stop_action.triggered.connect(self.on_stop)
# main widget
#
# port
portname_label = QLabel('tty port:')
self.portname = QLineEdit()
self.portname.setEnabled(False)
self.portname.setFrame(False)
portname_layout = QHBoxLayout()
portname_layout.addWidget(portname_label)
portname_layout.addWidget(self.portname, 0)
portname_layout.addStretch(1)
portname_groupbox = QGroupBox('Port')
portname_groupbox.setLayout(portname_layout)
# plot widget
self.plot = qwt.QwtPlot(self)
self.plot.setCanvasBackground(Qt.black)
self.plot.setAxisTitle(qwt.QwtPlot.xBottom, 'Time')
self.plot.setAxisScale(qwt.QwtPlot.xBottom, 0, 10, 1)
self.plot.setAxisTitle(qwt.QwtPlot.yLeft, 'Temperature')
self.plot.setAxisScale(qwt.QwtPlot.yLeft, 0, 250, 40)
self.plot.replot()
# curve widget
self.curve = qwt.QwtPlotCurve('')
self.curve.setRenderHint(qwt.QwtPlotItem.RenderAntialiased)
pen = QPen(QColor('limegreen'))
pen.setWidth(2)
self.curve.setPen(pen)
self.curve.attach(self.plot)
# dial
#
self.dial = QDial()
self.dial.setNotchesVisible(True)
self.dial.setRange(0, 20)
self.dial.setValue(10)
self.dial.valueChanged.connect(self.on_dial_change)
self.dial_label = QLabel('Update speed = %s (Hz)' % self.dial.value())
self.dial_label.setAlignment(Qt.AlignTop | Qt.AlignHCenter)
dial_layout = QVBoxLayout()
dial_layout.addWidget(self.dial)
dial_layout.addWidget(self.dial_label)
# plot layout
plot_layout = QVBoxLayout()
plot_layout.addWidget(self.plot)
plot_layout.addLayout(dial_layout)
plot_groupbox = QGroupBox('Temperature')
plot_groupbox.setLayout(plot_layout)
# main
self.main_frame = QWidget()
main_layout = QVBoxLayout()
main_layout.addWidget(portname_groupbox)
main_layout.addWidget(plot_groupbox)
main_layout.addStretch(1)
self.main_frame.setLayout(main_layout)
self.setCentralWidget(self.main_frame)
# status
#
self.status_text = QLabel('Monitor idle')
self.statusBar().addWidget(self.status_text, 1)
import qwt
import numpy as np
app = qtpy.QtGui.QApplication([])
x = np.linspace(-10, 10, 500)
plot = qwt.QwtPlot("Trigonometric functions")
plot.insertLegend(qwt.QwtLegend(), qwt.QwtPlot.BottomLegend)
qwt.QwtPlotCurve.make(x,
np.cos(x),
"Cosinus",
plot,
linecolor="red",
antialiased=True)
qwt.QwtPlotCurve.make(x,
np.sin(x),
"Sinus",
plot,
linecolor="blue",
antialiased=True)
plot.resize(600, 300)
plot.show()
import os.path as osp
plot.grab().save(
osp.join(osp.abspath(osp.dirname(__file__)), "images",
"QwtPlot_example.png"))
app.exec_()
pen.setJoinStyle(QC.Qt.MiterJoin)
symbol = qwt.QwtSymbol()
symbol.setPen(pen)
symbol.setBrush(QC.Qt.red)
symbol.setPath(path)
symbol.setPinPoint(QC.QPointF(0.0, 0.0))
symbol.setSize(10, 14)
# --- Test it within a simple plot ---
curve = qwt.QwtPlotCurve()
curve_pen = QG.QPen(QC.Qt.blue)
curve_pen.setStyle(QC.Qt.DotLine)
curve.setPen(curve_pen)
curve.setSymbol(symbol)
x = np.linspace(0, 10, 10)
curve.setData(x, np.sin(x))
plot = qwt.QwtPlot()
curve.attach(plot)
plot.resize(600, 300)
plot.replot()
plot.show()
plot.grab().save(
osp.join(osp.abspath(osp.dirname(__file__)), "images", "symbol_path_example.png")
)
app.exec_()