[PyKDE] Newbie PyQt question

[Andreas Pauley]

Hi all,

I've started writing an app (point of sale) that needs to first show a 
login dialog (and succesfully authenticate a user) before showing the main 
window.

I've managed to do this, but my program fails to exit and return to the 
command prompt whenever the authentication failed and the main window 
never gets showed. The login window closes, but the command I use to 
start the app (python main.py) just hangs until I manually kill the 
proccess.
The problem doesn't occur when the program exits after the main window is 
shown.

I'm using QT 3.3.3 with PyQt 3.13.

Regards,
Andreas

Here is a summary of my code.
(This can also be downloaded from 
http://www.qbcon.com/downloads/python/qualitypos-minimal.tgz (12k))

In main.py I do:
     qapp = QApplication(sys.argv)
     QObject.connect(qapp,SIGNAL("lastWindowClosed()"),qapp,SLOT("quit()"))
     poswindow = QualityPOS()
     qapp.setMainWidget(poswindow)
     poswindow.login()
     qapp.exec_loop()

In the QualityPOS login() method:
class QualityPOS(QualityPOSBase):
     def login(self):
         loginwindow = Login(self)
         loginwindow.show()
         loginwindow.exec_loop()

The clicked signal of my login form connects to the authenticate() method 
in my Login class:
class Login(LoginBase):
     def __init__(self, poswindow):
         LoginBase.__init__(self)
         self.authenticated = False
         self.poswindow = poswindow

     def authenticate(self):
         username=str(self.lnedUsername.text())
         password=str(self.lnedPassword.text())
         user=User.getUser(username, password)
         if user:
             self.poswindow.show()
             self.authenticated = True
         else:
             self.authenticated = False
             QMessageBox.warning(None,
                 self.trUtf8("Login Incorrect"),
                 self.trUtf8("""The user id and password you entered is 
incorrect."""),
                 None,
                 None,
                 None,
                 0, -1)
         return self.authenticated