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()