Question

我正在尝试使用QThread和信号制作进度条。但是我无法将带有进度的信号发送回GUI类：

class RealTh(QThread):

   value = pyqtSignal(int)
   result = pyqtSignal(list)

   def run(self):
       x = calc().longtask()[0]
       self.value.emit(x)
       l = calc().longtask()[1]
       self.result.emit(l)



class Ui_MainWindow(object):

   def setupUi(self, MainWindow):
           ...
           ...
       self.bcalc.clicked.connect(self.v2)

           ...

   def v2(self):
       self.thread = RealTh()
       self.thread.value.connect(self.setProgressVal)
       self.thread.result.connect(self.printer)
       self.thread.start()

   def printer(self, list):
       print(list)

   def setProgressVal(self, val):
       self.progressBar.setValue(val)


class calc():
   def __init__(self):
       self.calc = calc

   def longtask(self):
       print('task started')
       sleep(10)
       RealTh().value.emit(10)
       print('done')
       return [42, ['hello', 'this', 'is', 'result']]

如上所述，我正在尝试从emit函数中获取value的信号calc.longtask()。但是，当我这样做时，我得到：

'RealTh' does not have a signal with the signature value(int)

我知道this，但是情况不一样。

对于那些想重现此内容的人，下面是完整的CPed代码：


from PyQt5 import QtCore, QtGui, QtWidgets
import fakecalc
from time import sleep
from PyQt5.QtCore import Qt, QThread, pyqtSignal

class RealTh(QThread):
    value = pyqtSignal(int)
    result = pyqtSignal(list)
    def run(self):
        x = calc().longtask()[0]
        self.value.emit(x)
        l = calc().longtask()[1]
        self.result.emit(l)

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.progressBar = QtWidgets.QProgressBar(self.centralwidget)
        self.progressBar.setGeometry(QtCore.QRect(70, 370, 641, 23))
        self.progressBar.setProperty("value", 24)
        self.progressBar.setObjectName("progressBar")

        self.bprog = QtWidgets.QPushButton(self.centralwidget)
        self.bprog.setGeometry(QtCore.QRect(160, 170, 101, 51))
        self.bprog.setObjectName("bprog")

        self.bcalc = QtWidgets.QPushButton(self.centralwidget)
        self.bcalc.setGeometry(QtCore.QRect(500, 170, 101, 51))
        self.bcalc.setObjectName("bcalc")

        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        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)

        self.bcalc.clicked.connect(self.v2)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.bprog.setText(_translate("MainWindow", "Start prog bar"))
        self.bcalc.setText(_translate("MainWindow", "Start calc"))

    def v2(self):
        self.thread = RealTh()
        self.thread.value.connect(self.setProgressVal)
        self.thread.result.connect(self.printer)
        self.thread.start()

    def printer(self, list):
        print(list)

    def setProgressVal(self, val):
        self.progressBar.setValue(val)


class calc():
    def __init__(self):
        self.calc = calc

    def longtask(self):
        print('task started')
        RealTh().value.emit(10)
        print('done')
        return [42, ['hello', 'this', 'is', 'result']]


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_())

从另一个类发送信号，然后再定义它

0 个答案: