How use .ui files in PyQT?

[Mikeeeeee]

Hi!
How use .ui files in PyQT?
I find this, but here no file ui_mainwindow and code not work.

class MainWindow(QMainWindow):
    def __init__(self):
        # super(MainWindow, self).__init__()
        # self.ui = Ui_MainWindow()
        # self.ui.setupUi(self)
        ui_file = QFile("./mainwindow.ui")
        ui_file.open(QFile.ReadOnly)

        loader = QUiLoader()
        window = loader.load(ui_file)
        window.show()

if __name__ == "__main__":
    app = QApplication(sys.argv)

    window = MainWindow()
    # window.show()

    sys.exit(app.exec_())

[Mikeeeeee]

sory, its work:

import sys
from PySide2.QtUiTools import QUiLoader
from PySide2.QtWidgets import QApplication
from PySide2.QtCore import QFile, QIODevice

if __name__ == "__main__":
    app = QApplication(sys.argv)

    ui_file_name = "mainwindow.ui"
    ui_file = QFile(ui_file_name)
    if not ui_file.open(QIODevice.ReadOnly):
        print("Cannot open {}: {}".format(ui_file_name, ui_file.errorString()))
        sys.exit(-1)
    loader = QUiLoader()
    window = loader.load(ui_file)
    ui_file.close()
    if not window:
        print(loader.errorString())
        sys.exit(-1)
    window.show()

    sys.exit(app.exec_())

[JonB]

@Mikeeeeee
You are dynamically loading your ui file at run-time. That is fine, but more code for you to write, no code completion at design-time, no class/member variables etc. for the form, you must supply the ui file at run-time, and so on.

Are you aware that you can --- if you wish --- use the pyuic5 program supplied with PyQt5 to produce Python/PyQt5 code for your ui files instead of loading them dynamically at runtime, with corresponding advantages? An explanation is at https://stackoverflow.com/questions/52471705/why-in-pyqt5-should-i-use-pyuic5-and-not-uic-loaduimy-ui, with clickable link for pyuic5 to get you going.

[Kent-Dorfman]

use pyuic5 -x interface.ui and then inspect the __main__ created to test the interface. That should enlighten you as to how to instantiate it, if you understand python.

[Mikeeeeee]

Are there any working examples with pyuic5?

[Mikeeeeee]

It is not work

class CdViewer(QObject):
    def __init__(self):
        super(CdViewer, self).__init__()
        uic.loadUi("cdViewer.ui", self)
        self.show()

It is work, but how I can work with widgets and get signals?

if __name__ == '__main__':
    app = Qt.QApplication([])
    win = uic.loadUi("cdViewer.ui")
    win.show()
    app.exec()

[Mikeeeeee]

It is works:

from PyQt5 import QtCore, QtGui, QtWidgets, uic

from PyQt5 import Qt
# from PyQt5 import QtNetwork
from PySide2.QtCore import QObject
# from PyQt5.QtCore import QCoreApplication, QUrl
import sys

class CdViewer(QObject):
    # ui = uic.loadUi("cdViewer.ui")


    def __init__(self):
        # super(CdViewer, self).__init__()
        self.ui = uic.loadUi("cdViewer.ui")
        self.ui.label_13.setText("asdf")

    def showWindow(self):
        self.ui.show()



if __name__ == '__main__':
    app = Qt.QApplication([])
    # win = uic.loadUi("cdViewer.ui")
    # win.show()
    # sys.exit(app.exec())
    cdViewer = CdViewer()
    cdViewer.showWindow()
    # cdViewer.show()
    app.exec()