如何从pyqt5 groupbox发出可动态更新的信号

Question

我有一个并行线程，它读取10uart并在pyqt5gui中打印数据。但我面临的问题是，当所有10个作业都完成时，这些groupbox就会更新，但不会立即更新。在

编辑：为了实现并行，我使用的是joblib而不是pyqt线程。在

我想要实现的是改变groupbox属性的状态，比如标签、按钮文本和颜色，但是我没有找到一个好的例子来触发groupbox的信号发射。在

我需要在groupbox中发出单独的标签、按钮还是可以作为一个groupbox对象发射？在

这是一个极简的代码，它只有两个groupbx。有人能帮助如何从groupbox发出信号并捕捉变化，即标签状态、按钮文本和下面代码中的颜色？在

下面的例子更新groupox没有任何问题，但实际上每个g1方法都是uart，它是阻塞调用。我等到所有作业完成后才能看到GUI上的更改。在

代码

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import Qt, pyqtSignal

class Ui_MainWindow(object):
    changedValue = pyqtSignal(int)

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
        self.groupBox.setGeometry(QtCore.QRect(100, 140, 120, 141))
        self.groupBox.setObjectName("groupBox")
        self.pushButton_2 = QtWidgets.QPushButton(self.groupBox)
        self.pushButton_2.setGeometry(QtCore.QRect(0, 40, 113, 32))
        self.pushButton_2.setObjectName("pushButton_2")
        self.pushButton_3 = QtWidgets.QPushButton(self.groupBox)
        self.pushButton_3.setGeometry(QtCore.QRect(0, 90, 113, 32))
        self.pushButton_3.setObjectName("pushButton_3")
        self.label = QtWidgets.QLabel(self.groupBox)
        self.label.setGeometry(QtCore.QRect(0, 20, 121, 16))
        self.label.setObjectName("label")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(180, 80, 113, 32))
        self.pushButton.setObjectName("pushButton")
        self.groupBox_2 = QtWidgets.QGroupBox(self.centralwidget)
        self.groupBox_2.setGeometry(QtCore.QRect(230, 140, 120, 141))
        self.groupBox_2.setObjectName("groupBox_2")
        self.pushButton_4 = QtWidgets.QPushButton(self.groupBox_2)
        self.pushButton_4.setGeometry(QtCore.QRect(0, 40, 113, 32))
        self.pushButton_4.setObjectName("pushButton_4")
        self.pushButton_5 = QtWidgets.QPushButton(self.groupBox_2)
        self.pushButton_5.setGeometry(QtCore.QRect(0, 90, 113, 32))
        self.pushButton_5.setObjectName("pushButton_5")
        self.label_2 = QtWidgets.QLabel(self.groupBox_2)
        self.label_2.setGeometry(QtCore.QRect(0, 20, 121, 16))
        self.label_2.setObjectName("label_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.pushButton.clicked.connect(self.groupBox.update)
        self.pushButton.clicked.connect(self.groupBox_2.update)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.groupBox.setTitle(_translate("MainWindow", "UART1"))
        self.pushButton_2.setText(_translate("MainWindow", "Test1"))
        self.pushButton_3.setText(_translate("MainWindow", "Test2"))
        self.label.setText(_translate("MainWindow", "IMEI"))
        self.pushButton.setText(_translate("MainWindow", "START"))
        self.groupBox_2.setTitle(_translate("MainWindow", "UART2"))
        self.pushButton_4.setText(_translate("MainWindow", "Test1"))
        self.pushButton_5.setText(_translate("MainWindow", "Test2"))
        self.label_2.setText(_translate("MainWindow", "IMEI"))

        #Setting a connection here
        self.pushButton.clicked.connect(self.g1)
        self.pushButton.clicked.connect(self.g2)

    def g1(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        self.pushButton.setText(_translate("MainWindow", "Running"))
        imei = "12345"
        self.label.setText(imei)
        self.changedValue.emit(imei)
        self.pushButton_2.setText(_translate("MainWindow", "Pass"))
        self.pushButton_3.setText(_translate("MainWindow", "FAIL"))
        self.pushButton_3.setStyleSheet("background-color:  rgb(0, 255, 0);")

    def g2(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        self.pushButton.setText(_translate("MainWindow", "Done"))
        imei = "12345"
        self.label_2.setText("12345")
        self.changedValue.emit(imei)
        self.pushButton_4.setText(_translate("MainWindow", "FAIL"))
        self.pushButton_4.setStyleSheet("background-color:  rgb(0, 255, 0);")
        self.pushButton_5.setText(_translate("MainWindow", "Pass"))

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_())

Answer 1

首先，我建议您阅读文档中的Using the Generated Code。PyQt在这篇文章中建议不要修改Qt Designer生成的代码，因为它不是一个widget，它只是一个用来填充widget的类，相反，最好根据所选的表单创建另一个类并在那里实现逻辑，例如，您的代码有一个严重的错误：信号只能在像widgets这样的QObject中创建，而Ui\u MainWindow则不能。在

考虑到上述情况，解决方案是：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
        self.groupBox.setGeometry(QtCore.QRect(100, 140, 120, 141))
        self.groupBox.setObjectName("groupBox")
        self.pushButton_2 = QtWidgets.QPushButton(self.groupBox)
        self.pushButton_2.setGeometry(QtCore.QRect(0, 40, 113, 32))
        self.pushButton_2.setObjectName("pushButton_2")
        self.pushButton_3 = QtWidgets.QPushButton(self.groupBox)
        self.pushButton_3.setGeometry(QtCore.QRect(0, 90, 113, 32))
        self.pushButton_3.setObjectName("pushButton_3")
        self.label = QtWidgets.QLabel(self.groupBox)
        self.label.setGeometry(QtCore.QRect(0, 20, 121, 16))
        self.label.setObjectName("label")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(180, 80, 113, 32))
        self.pushButton.setObjectName("pushButton")
        self.groupBox_2 = QtWidgets.QGroupBox(self.centralwidget)
        self.groupBox_2.setGeometry(QtCore.QRect(230, 140, 120, 141))
        self.groupBox_2.setObjectName("groupBox_2")
        self.pushButton_4 = QtWidgets.QPushButton(self.groupBox_2)
        self.pushButton_4.setGeometry(QtCore.QRect(0, 40, 113, 32))
        self.pushButton_4.setObjectName("pushButton_4")
        self.pushButton_5 = QtWidgets.QPushButton(self.groupBox_2)
        self.pushButton_5.setGeometry(QtCore.QRect(0, 90, 113, 32))
        self.pushButton_5.setObjectName("pushButton_5")
        self.label_2 = QtWidgets.QLabel(self.groupBox_2)
        self.label_2.setGeometry(QtCore.QRect(0, 20, 121, 16))
        self.label_2.setObjectName("label_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.pushButton.clicked.connect(self.groupBox.update)
        self.pushButton.clicked.connect(self.groupBox_2.update)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.groupBox.setTitle(_translate("MainWindow", "UART1"))
        self.pushButton_2.setText(_translate("MainWindow", "Test1"))
        self.pushButton_3.setText(_translate("MainWindow", "Test2"))
        self.label.setText(_translate("MainWindow", "IMEI"))
        self.pushButton.setText(_translate("MainWindow", "START"))
        self.groupBox_2.setTitle(_translate("MainWindow", "UART2"))
        self.pushButton_4.setText(_translate("MainWindow", "Test1"))
        self.pushButton_5.setText(_translate("MainWindow", "Test2"))
        self.label_2.setText(_translate("MainWindow", "IMEI"))


class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    changedValue = QtCore.pyqtSignal(int)

    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
        #Setting a connection here
        self.pushButton.clicked.connect(self.g1)
        self.pushButton.clicked.connect(self.g2)

    @QtCore.pyqtSlot()
    def g1(self):
        _translate = QtCore.QCoreApplication.translate
        self.pushButton.setText(_translate("MainWindow", "Running"))
        imei = "12345"
        self.label.setText(imei)
        self.changedValue.emit(imei)
        self.pushButton_2.setText("Pass")
        self.pushButton_3.setText(_translate("MainWindow", "FAIL"))
        self.pushButton_3.setStyleSheet("background-color:  rgb(0, 255, 0);")

    @QtCore.pyqtSlot()
    def g2(self):
        _translate = QtCore.QCoreApplication.translate
        self.pushButton.setText(_translate("MainWindow", "Done"))
        imei = "12345"
        self.label_2.setText("12345")
        self.changedValue.emit(imei)
        self.pushButton_4.setText(_translate("MainWindow", "FAIL"))
        self.pushButton_4.setStyleSheet("background-color:  rgb(0, 255, 0);")
        self.pushButton_5.setText(_translate("MainWindow", "Pass"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())