PYQT5 item cannot be converted to PyQt5.QtCore.QObject in this context-CodePudding

I am trying to display opencv webcam on my PYQT5 python code which inherits from Py2side code called ui_interface by showing the image within a label (label_5)

from ui_interface import *
import sys
import os
# IMPORT Custom widgets
from Custom_Widgets.Widgets import *
import cv2
import numpy as np
from PyQt5.QtCore import pyqtSignal

class MainWindow(QMainWindow):
    def __init__(self,parent=None):
        QMainWindow.__init__(self)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)   
        loadJsonStyle(self, self.ui)



        self.show()

        #Expand Center Menu Widget
        self.ui.settingsBtn.clicked.connect(lambda: self.ui.centerMenuContainer.expandMenu())
        self.ui.infoBtn.clicked.connect(lambda: self.ui.centerMenuContainer.expandMenu())
        self.ui.helpBtn.clicked.connect(lambda: self.ui.centerMenuContainer.expandMenu())
        
        #Close Center Menu Widget
        self.ui.closeCenterMenuButton.clicked.connect(lambda: self.ui.centerMenuContainer.collapseMenu())


        #Close Notification Menu Widget
        self.ui.closeNotificationBtn.clicked.connect(lambda: self.ui.popUpNotificationContainer.collapseMenu())


        
        self.Worker1 = Worker1()

        self.Worker1.start()
        self.Worker1.ImageUpdate.connect(self.ImageUpdateSlot)
        
        

        

    def ImageUpdateSlot(self, Image):
        self.ui.label_5.setPixmap(QPixmap.fromImage(Image))

    def CancelFeed(self):
        self.Worker1.stop()     






class Worker1(QThread):
    ImageUpdate = pyqtSignal(QImage)
    def run(self):
        self.ThreadActive = True
        Capture = cv2.VideoCapture(0)
        while self.ThreadActive:
            ret, frame = Capture.read()
            if ret:
                Image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                FlippedImage = cv2.flip(Image, 1)
                ConvertToQtFormat = QImage(FlippedImage.data, FlippedImage.shape[1], FlippedImage.shape[0], QImage.Format_RGB888)
                Pic = ConvertToQtFormat.scaled(640, 480, Qt.KeepAspectRatio)
                self.ImageUpdate.emit(Pic)
    def stop(self):
        self.ThreadActive = False
        self.quit()
        

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

The error that I am encountering is the following:

The main issue is that I am referencing ui.label_5 which comes from py2side and so I need to figure how to convert it to QObject

I have read another article stating this issue: PyQt5 connection doesn't work: item cannot be converted to PyQt5.QtCore.QObject in this context

Stating the following:

QGraphicsItem does not inherit from QObject, therefore it is not possible to emit a signal from an instance of QGraphicsItem. You can solve this by subclassing QGraphicsObject instead of QGraphicsItem: http://doc.qt.io/qt-5/qgraphicsobject.html.

But I dont understand what they mean by QGraphicsItem does not inherit from QObject

Could anyone shed some light on this doubt?

CodePudding user response：

This solved the issue:

from ui_interface import *
import sys
import os
# IMPORT Custom widgets
from Custom_Widgets.Widgets import *
import cv2
import numpy as np
from PyQt5.QtCore import pyqtSignal, QObject, QThread

class MainWindow(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        loadJsonStyle(self, self.ui)

        self.show()

        #Expand Center Menu Widget
        self.ui.settingsBtn.clicked.connect(lambda: self.ui.centerMenuContainer.expandMenu())
        self.ui.infoBtn.clicked.connect(lambda: self.ui.centerMenuContainer.expandMenu())
        self.ui.helpBtn.clicked.connect(lambda: self.ui.centerMenuContainer.expandMenu())

        #Close Center Menu Widget
        self.ui.closeCenterMenuButton.clicked.connect(lambda: self.ui.centerMenuContainer.collapseMenu())

        #Close Notification Menu Widget
        self.ui.closeNotificationBtn.clicked.connect(lambda: self.ui.popUpNotificationContainer.collapseMenu())

        self.worker1 = Worker1()

        self.worker1.start()
        self.worker1.ImageUpdate.connect(self.ImageUpdateSlot)

    
    def ImageUpdateSlot(self, Image):
        self.ui.label_5.setPixmap(QPixmap.fromImage(Image))

    def CancelFeed(self):
        self.worker1.stop()


class Worker1(QThread):
    ImageUpdate = pyqtSignal(QImage)
    def __init__(self):
        super().__init__()

    def run(self):
        self.ThreadActive = True
        Capture = cv2.VideoCapture(0)
        while self.ThreadActive:
            ret, frame = Capture.read()
            if ret:
                Image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                FlippedImage = cv2.flip(Image, 1)
                ConvertToQtFormat = QImage(FlippedImage.data, FlippedImage.shape[1], FlippedImage.shape[0], QImage.Format_RGB888)
                Pic = ConvertToQtFormat.scaled(640, 480, Qt.KeepAspectRatio)
                self.ImageUpdate.emit(Pic)

    def stop(self):
        self.ThreadActive = False
        self.quit()


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