打印不更新qt图形用户界面和pyqtgraph Python [英] Plot not updating qt GUI and pyqtgraph Python
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问题描述
正如标题所说，我的情节没有更新。目标是在点击按钮时启动绘图。弹出窗口并形成轴，但没有绘制曲线。我在图形用户界面中使用了qt设计器中的pyqt5，并在绘图中使用了pyqtgraph。如果我想在同一窗口中添加更多的绘图，最佳的方法是什么？谢谢
编码：
from PyQt5 import QtCore, QtGui, QtWidgets
import os,serial,jeje_rc
os.environ["TF_CPP_MIN_LOG_LEVEL"]="3"
import numpy as np
import pyqtgraph as pg
class Ui_MainWindow(object):
def ser(self):
self.raw = serial.Serial('COM4', 9600)
self.raw.close()
self.raw.open()
def update(self):
self.datos = self.raw.readline()
self.datos1 = self.datos.decode().split(',')
self.y1[self.m] = self.datos1[0]
if self.m == 99:
self.y1 = np.zeros(100, dtype=float)
self.m = 0
else:
self.m += 1
self.curva1.setData(self.y1)
app.processEvents()
def start(self):
self.ser()
self.win = pg.GraphicsWindow()
self.win.setWindowTitle('Datos de arduino')
self.p1 = self.win.addPlot()
self.p1.setYRange(0, 1024, padding=0)
self.curva1 = self.p1.plot()
self.datos = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
self.y1 = np.zeros(100, dtype=float)
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setWindowTitle("ECG de 12 Derivaciones UAO")
MainWindow.resize(800, 550)
self.m=0
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setMaximumSize(QtCore.QSize(805, 510))
self.centralwidget.setObjectName("centralwidget")
self.centralwidget.setWindowTitle("ECG de 12 Derivaciones UAO")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(20, 270, 241, 19))
self.label.setObjectName("label")
self.line = QtWidgets.QFrame(self.centralwidget)
self.line.setGeometry(QtCore.QRect(10, 230, 781, 20))
self.line.setFrameShape(QtWidgets.QFrame.HLine)
self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
self.line.setObjectName("line")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(600, 40, 181, 171))
self.label_2.setObjectName("label_2")
self.label_3 = QtWidgets.QLabel(self.centralwidget)
self.label_3.setGeometry(QtCore.QRect(40, 10, 591, 41))
font = QtGui.QFont()
font.setPointSize(16)
self.label_3.setFont(font)
self.label_3.setObjectName("label_3")
self.label_4 = QtWidgets.QLabel(self.centralwidget)
self.label_4.setGeometry(QtCore.QRect(170, 150, 221, 41))
font = QtGui.QFont()
font.setPointSize(11)
self.label_4.setFont(font)
self.label_4.setObjectName("label_4")
self.label_5 = QtWidgets.QLabel(self.centralwidget)
self.label_5.setGeometry(QtCore.QRect(110, 190, 471, 41))
font = QtGui.QFont()
font.setPointSize(11)
self.label_5.setFont(font)
self.label_5.setObjectName("label_5")
self.label_6 = QtWidgets.QLabel(self.centralwidget)
self.label_6.setGeometry(QtCore.QRect(50, 100, 521, 51))
font = QtGui.QFont()
font.setPointSize(9)
self.label_6.setFont(font)
self.label_6.setObjectName("label_6")
self.lineEdad = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdad.setGeometry(QtCore.QRect(110, 310, 261, 21))
self.lineEdad.setObjectName("lineEdad")
self.lineNombre = QtWidgets.QLineEdit(self.centralwidget)
self.lineNombre.setGeometry(QtCore.QRect(110, 270, 261, 20))
self.lineNombre.setObjectName("lineNombre")
self.BotonInicio = QtWidgets.QPushButton(self.centralwidget)
self.BotonInicio.setGeometry(QtCore.QRect(490, 290, 181, 41))
self.BotonInicio.setObjectName("BotonInicio")
self.BotonInicio.clicked.connect(self.start)
self.label_7 = QtWidgets.QLabel(self.centralwidget)
self.label_7.setGeometry(QtCore.QRect(20, 310, 68, 19))
self.label_7.setObjectName("label_7")
self.label_8 = QtWidgets.QLabel(self.centralwidget)
self.label_8.setGeometry(QtCore.QRect(20, 350, 61, 19))
self.label_8.setObjectName("label_8")
self.label_9 = QtWidgets.QLabel(self.centralwidget)
self.label_9.setGeometry(QtCore.QRect(20, 380, 111, 31))
self.label_9.setObjectName("label_9")
self.BoxGenero = QtWidgets.QComboBox(self.centralwidget)
self.BoxGenero.setGeometry(QtCore.QRect(110, 350, 92, 25))
self.BoxGenero.setObjectName("BoxGenero")
self.BoxGenero.addItem("")
self.BoxGenero.addItem("")
self.plainTextPatologias = QtWidgets.QPlainTextEdit(self.centralwidget)
self.plainTextPatologias.setGeometry(QtCore.QRect(110, 390, 261, 91))
self.plainTextPatologias.setObjectName("plainTextPatologias")
self.line_2 = QtWidgets.QFrame(self.centralwidget)
self.line_2.setGeometry(QtCore.QRect(390, 250, 20, 241))
self.line_2.setFrameShape(QtWidgets.QFrame.VLine)
self.line_2.setFrameShadow(QtWidgets.QFrame.Sunken)
self.line_2.setObjectName("line_2")
self.BotonExportar = QtWidgets.QPushButton(self.centralwidget)
self.BotonExportar.setGeometry(QtCore.QRect(490, 410, 181, 41))
self.BotonExportar.setObjectName("BotonExportar")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 805, 31))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
timer = QtCore.QTimer()
timer.timeout.connect(self.update)
timer.start(0)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "ECG de 12 Derivaciones"))
self.label.setText(_translate("MainWindow", "Nombre:"))
self.label_2.setText(_translate("MainWindow", "<html><head/><body><p><img src=":/newPrefix/logo-universidad-autonoma-de-occidente.png"/></p></body></html>"))
self.label_3.setText(_translate("MainWindow", "Electrocardiógrafo De 12 Derivaciones"))
self.label_4.setText(_translate("MainWindow", "Facultad de ingenieria"))
self.label_5.setText(_translate("MainWindow", " Universidad Autonoma De Occidente"))
self.label_6.setText(_translate("MainWindow", "Por: Mario Gomez, Viviana Calero, Sara Chillito, Stefania Calderon"))
self.BotonInicio.setText(_translate("MainWindow", "Inicio del programa"))
self.label_7.setText(_translate("MainWindow", "Edad:"))
self.label_8.setText(_translate("MainWindow", "Genero:"))
self.label_9.setText(_translate("MainWindow", "Patologias:"))
self.BoxGenero.setItemText(0, _translate("MainWindow", "Hombre"))
self.BoxGenero.setItemText(1, _translate("MainWindow", "Mujer"))
self.BotonExportar.setText(_translate("MainWindow", "Exportar datos"))
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_())
推荐答案
建议不要修改Qt Designer提供的代码，因为如果要修改设计，则必须重写代码，而且Ui_MainWindow类不是微件，而是用于填充某些微件的类，因此我建议删除更改。
另一方面，不适合使用范围为0的计时器运行，因为它不允许更新图形用户界面，另一方面，串口的读取被阻塞，因此可能的解决方案是使用QThread，并使用信号来更新GUI线程中的数据。
class Ui_MainWindow(object):
...
class ArduinoThread(QtCore.QThread):
dataChanged = QtCore.pyqtSignal(str)
def __init__(self, *args, **kwargs):
QtCore.QThread.__init__(self, *args, **kwargs)
self.raw = serial.Serial('com4', 9600)
self.raw.close()
self.raw.open()
def run(self):
while True:
datos_array = self.raw.readline().decode().split(',')
if datos_array:
datos = datos_array[0]
self.dataChanged.emit(datos)
QtCore.QThread.msleep(10)
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, *args, **kwargs):
QtWidgets.QMainWindow.__init__(self, *args, **kwargs)
self.setupUi(self)
self.BotonInicio.clicked.connect(self.start)
self.m = 0
def update_plot(self, dato):
if self.m > 99:
self.y1 = np.zeros(100, dtype=float)
self.m = 0
else:
self.y1[self.m] = dato
self.m += 1
self.curva1.setData(self.y1)
def start(self):
thread = ArduinoThread(self)
thread.dataChanged.connect(self.update_plot)
thread.start()
self.win = pg.GraphicsWindow()
self.win.setWindowTitle('Datos de arduino')
self.p1 = self.win.addPlot()
self.p1.setYRange(0, 1024, padding=0)
self.curva1 = self.p1.plot()
self.y1 = np.zeros(100, dtype=float)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
如您所见，我做了一些更改以改进应用程序作为验证、在必要时使用变量等。
虽然与Qt兼容的一种方法是使用在有新数据时发出readyRead信号的QSerialPort：
from PyQt5 import QtCore, QtGui, QtWidgets, QtSerialPort
....
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, *args, **kwargs):
QtWidgets.QMainWindow.__init__(self, *args, **kwargs)
self.setupUi(self)
self.BotonInicio.clicked.connect(self.start)
def update_plot(self):
while self.ser.canReadLine():
line = bytearray(self.ser.readLine()).decode()
self.processLine(line)
def processLine(self, line):
datos_array = line.strip().split(',')
if datos_array:
dato = datos_array[0]
if self.m > 99:
self.y1 = np.zeros(100, dtype=float)
self.m = 0
else:
self.y1[self.m] = dato
self.m += 1
self.curva1.setData(self.y1)
def start(self):
self.ser = QtSerialPort.QSerialPort("com4", self)
self.ser.setBaudRate(9600)
self.ser.readyRead.connect(self.update_plot)
self.ser.open(QtSerialPort.QSerialPort.ReadOnly)
self.win = pg.GraphicsWindow()
self.win.setWindowTitle('Datos de arduino')
self.p1 = self.win.addPlot()
self.p1.setYRange(0, 1024, padding=0)
self.curva1 = self.p1.plot()
self.y1 = np.zeros(100, dtype=float)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
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