How should I start a screen?

_jao_victor_

How do I start a login screen and sequentially a main screen (after data validation) ? I am a beginner and saw that it is not feasible to have two QApplication screens on the same system. However, as I use qtDesigner to develop my GUIs the code that runs my screens is automatically generated:

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication.instance()
    MainWindow = QtWidgets.QMainWindow()
    ui = TelaLogin()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

How do I stop my login screen from being QApplication so that the main screen can run?

SGaist

The code generated by Designer allows you to see the widget if you call the script directly. That's not what you want.

Create your own main.py, import the widgets you want to use and implement the logic there.

SGaist

Hi,

You should do it in two steps. First manage the login using a dialog and only if successful continue with the MainWindow.

_jao_victor_

@SGaist Now my login screen is a QDialog and my main screen is a QMainWindow. I want to manage these screens through another file (main.py), but I don't know how to start these screens in this file.

The code generated by qtDesigner generated this screen execution code:

import sys
    app = QtWidgets.QApplication(sys.argv)
    Dialog = QtWidgets.QDialog()
    ui = Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.show()
    sys.exit(app.exec_())

SGaist

The code generated by Designer allows you to see the widget if you call the script directly. That's not what you want.

Create your own main.py, import the widgets you want to use and implement the logic there.