Я пытаюсь построить случайные данные, используя pyqtgraph.Я использовал пример «графика прокрутки» из «pyqtgraph.examples» в качестве шаблона для создания графика для случайных данных. Здесь я определил две функции: одну для события кнопки, а другую для обновления данных.
Я хочу построить данные, установив флажок и щелкнув кнопку построения.Я нашел много других примеров, таких как «Обновление и PlotWidgets в PyQt4 для построения графиков в реальном времени», но я не понимаю, как его использовать для self.graphicsView = pg.PlotWidget(self.centralwidget).И я нашел некоторые решения, но я не могу увидеть график на виджете.
class Ui_MainWindow(QtGui.QWidget):
def __init__(self, parent=None):
super(Ui_MainWindow, self).__init__(parent)
self.FREQUENCY = .004
self.TIMER_FREQUENCY = self.FREQUENCY * 1000
self.LEFT_X = 0
self.RIGHT_X = 3
self.X_Axis = np.arange(self.LEFT_X, self.RIGHT_X, self.FREQUENCY)
self.buffer = int((abs(self.LEFT_X) + abs(self.RIGHT_X))/self.FREQUENCY)
self.data = []
self.graphicsView = pg.PlotWidget(self.centralwidget)
## self.graphicsView = pg.PlotWidget()
self.graphicsView.plotItem.setMouseEnabled(x=False, y=False)
self.graphicsView.setXRange(self.LEFT_X, self.RIGHT_X)
self.scrolling_plot = self.graphicsView.plot()
self.layout = QtGui.QGridLayout()
self.layout.addWidget(self.graphicsView)
self.read_position_thread()
self.start()
def start(self):
self.position_update_timer = QtCore.QTimer()
self.position_update_timer.timeout.connect(self.Plot_Button)
self.position_update_timer.start(self.get_scrolling_plot_timer_frequency())
def read_position_thread(self):
self.current_position_value = 0
self.old_current_position_value = 0
self.position_update_thread = Thread(target=self.read_position, args=())
self.position_update_thread.daemon = True
self.position_update_thread.start()
def read_position(self):
frequency = self.get_scrolling_plot_frequency()
while True:
try:
self.current_position_value = random.randint(1,101)
self.old_current_position_value = self.current_position_value
time.sleep(frequency)
except:
self.current_position_value = self.old_current_position_value
def Plot_Button(self):
if self.a1.isChecked():
self.dataPoint = float(self.current_position_value)
if len(self.data) >= self.buffer:
del self.data[:1]
self.data.append(self.dataPoint)
self.scrolling_plot.setData(self.X_Axis[len(self.X_Axis) - len(self.data):], self.data)
def clear_scrolling_plot(self):
self.data[:] = []
def get_scrolling_plot_frequency(self):
return self.FREQUENCY
def get_scrolling_plot_timer_frequency(self):
return self.TIMER_FREQUENCY
def get_scrolling_plot_layout(self):
return self.layout
def get_current_position_value(self):
return self.current_position_value
def get_scrolling_plot_widget(self):
return self.graphicsView
def Pause_Button(self):
QCoreApplication.instance().quit()
print("fail")
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(795, 359)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.Plot = QtWidgets.QPushButton(self.centralwidget)
self.Plot.setGeometry(QtCore.QRect(530, 260, 80, 23))
self.Plot.setObjectName("Plot")
self.Plot.clicked.connect(self.Plot_Button)
self.Pause = QtWidgets.QPushButton(self.centralwidget)
self.Pause.setGeometry(QtCore.QRect(620, 260, 80, 23))
self.Pause.setObjectName("Pause")#
self.Pause.clicked.connect(self.Pause_Button)
self.frame = QtWidgets.QFrame(self.centralwidget)
self.frame.setGeometry(QtCore.QRect(520, 10, 251, 291))
self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame.setObjectName("frame")
self.label = QtWidgets.QLabel(self.frame)
self.label.setGeometry(QtCore.QRect(140, 6, 101, 20))
## self.label.setObjectName("Sampling Frequency")
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.frame)
self.label_2.setGeometry(QtCore.QRect(150, 40, 51, 20))
## self.label_2.setObjectName("Offset")
self.label_2.setObjectName("label_2")
self.a1 = QtWidgets.QCheckBox(self.frame)
self.a1.setGeometry(QtCore.QRect(30, 70, 74, 21))
self.a1.setObjectName("a1")
self.a2 = QtWidgets.QCheckBox(self.frame)
self.a2.setGeometry(QtCore.QRect(30, 90, 74, 21))
self.a2.setObjectName("a2")
self.a3 = QtWidgets.QCheckBox(self.frame)
self.a3.setGeometry(QtCore.QRect(30, 110, 74, 21))
self.a3.setObjectName("a3")
self.a4 = QtWidgets.QCheckBox(self.frame)
self.a4.setGeometry(QtCore.QRect(30, 130, 71, 21))
self.a4.setObjectName("a4")
self.a5 = QtWidgets.QCheckBox(self.frame)
self.a5.setGeometry(QtCore.QRect(30, 150, 74, 21))
self.a5.setObjectName("a5")
self.a6 = QtWidgets.QCheckBox(self.frame)
self.a6.setGeometry(QtCore.QRect(30, 170, 74, 21))
self.a6.setObjectName("a6")
self.a7 = QtWidgets.QCheckBox(self.frame)
self.a7.setGeometry(QtCore.QRect(30, 190, 74, 21))
self.a7.setObjectName("a7")
self.a8 = QtWidgets.QCheckBox(self.frame)
self.a8.setGeometry(QtCore.QRect(30, 210, 71, 21))
self.a8.setObjectName("a8")
self.lineEdit_1 = QtWidgets.QLineEdit(self.frame)
self.lineEdit_1.setGeometry(QtCore.QRect(20, 10, 113, 21))
self.lineEdit_1.setObjectName("lineEdit_1")
self.lineEdit_2 = QtWidgets.QLineEdit(self.frame)
self.lineEdit_2.setGeometry(QtCore.QRect(20, 40, 113, 20))
self.lineEdit_2.setObjectName("lineEdit_2")
## self.graphicsView = QtWidgets.QGraphicsView(self.centralwidget)
self.graphicsView = pg.PlotWidget(self.centralwidget)
self.graphicsView.setLabel('bottom', 'Time (s)')
self.graphicsView.setLabel('left', 'Value')
self.graphicsView.setTitle('Scrolling Plot Example')
self.graphicsView.setGeometry(QtCore.QRect(5, 11, 501, 291))
self.graphicsView.setObjectName("graphicsView")
self.frame.raise_()
self.Plot.raise_()
self.Pause.raise_()
self.graphicsView.raise_()
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 795, 21))
self.menubar.setObjectName("menubar")
self.menuFile = QtWidgets.QMenu(self.menubar)
self.menuFile.setObjectName("menuFile")
self.menuAbout = QtWidgets.QMenu(self.menubar)
self.menuAbout.setObjectName("menuAbout")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionOpen = QtWidgets.QAction(MainWindow)
self.actionOpen.setObjectName("actionOpen")
self.actionSave_As = QtWidgets.QAction(MainWindow)
self.actionSave_As.setObjectName("actionSave_As")
self.actionScreenshot = QtWidgets.QAction(MainWindow)
self.actionScreenshot.setObjectName("actionScreenshot")
self.actionExit = QtWidgets.QAction(MainWindow)
self.actionExit.setObjectName("actionExit")
self.menuFile.addAction(self.actionOpen)
self.menuFile.addAction(self.actionSave_As)
self.menuFile.addAction(self.actionScreenshot)
self.menuFile.addAction(self.actionExit)
self.menubar.addAction(self.menuFile.menuAction())
self.menubar.addAction(self.menuAbout.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.Plot.setText(_translate("MainWindow", "Plot"))
self.Pause.setText(_translate("MainWindow", "Pause"))
self.label.setText(_translate("MainWindow", "Sampling Frequency"))
self.label_2.setText(_translate("MainWindow", "Offset"))
self.a1.setText(_translate("MainWindow", "a1"))
self.a2.setText(_translate("MainWindow", "a2"))
self.a3.setText(_translate("MainWindow", "a3"))
self.a4.setText(_translate("MainWindow", "a4"))
self.a5.setText(_translate("MainWindow", "a5"))
self.a6.setText(_translate("MainWindow", "a6"))
self.a7.setText(_translate("MainWindow", "a7"))
self.a8.setText(_translate("MainWindow", "a8"))
self.menuFile.setTitle(_translate("MainWindow", "File"))
self.menuAbout.setTitle(_translate("MainWindow", "About"))
self.actionOpen.setText(_translate("MainWindow", "Open"))
self.actionSave_As.setText(_translate("MainWindow", "Save As"))
self.actionScreenshot.setText(_translate("MainWindow", "Screenshot"))
self.actionExit.setText(_translate("MainWindow", "Exit"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
Теперь я внес изменения в свой код.Я не могу увидеть график на виджете, так как я использую self.graphicsView = pg.PlotWidget(self.centralwidget) внутри функции. Кто-нибудь может мне помочь, какие изменения я могу внести, чтобы увидеть график