Return values from QDialog to MainWindow

I've created a simple custom QDialog with three QLineEdits. When clicking the "OK" button I want to read the entered text and return them to the MainWindow object where the values will be stored in a list.

How do I return the values from the QDialog class so I can store them in the list in the MainWindow class, and how do I call it properly?

This is the code I have at the moment:

Code:

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class MainWindow(QtGui.QMainWindow):
 
    deviceList = []
 
    def openAddDialog(self):
        print "running openAddDialog..."
        diag = AddDevice()

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Code:

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from PySide.QtGui import *
 
class AddDevice(QDialog):
 
    def __init__(self):
        QDialog.__init__(self)
        self.setWindowTitle("Add Device")
        self.resize(400, 300)
 
        iLabel = QLabel("IPv4 address:")
        self.iText = QLineEdit()
 
        uLabel = QLabel("Username:")
        self.uText = QLineEdit()
 
        pLabel = QLabel("Password:")
        self.pText = QLineEdit()
 
        okButton = QPushButton()
        okButton.setText("OK")
        okButton.clicked.connect(self.add)
 
        frame = QFrame(self)
 
        formLayout = QFormLayout(frame)
        formLayout.addRow(iLabel, self.iText)
        formLayout.addRow(uLabel, self.uText)
        formLayout.addRow(pLabel, self.pText)
        formLayout.addRow(okButton, okButton)
 
        self.exec_()
 
    def add(self):
        ipv4 = self.iText.text()
        username = self.uText.text()
        password = self.pText.text()
 
        print ipv4, username, password

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The pattern for a modal dialog is usually this

1. create dialog instance
2. call exec() on that instance
3. read values using getter methods

Cheers,
_

Like this?

Code:

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def openAddDialog(self):
        print "running openAddDialog..."
        diag = AddDevice()
        diag.exec_()
        print diag.getIPv4(), diag.getUsername(), diag.getPassword()

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Does not seem like a good way to go, the values will be read if the user cancels/aborts the dialog window. This is exactly what I can't get my head around. I want the buttons and it's slots in the dialog class, but the values from the fields should be sent to or read from the MainWindow.

This is a brilliant way to do what you want :D

exec() returns if the dialog was accepted or rejected (= canceled) so just use this information and read or do not read the username etc.