I have a large app in PyQt5 that includes a login/logout element.
Main element:
class BigProgram(QMainWindow, QWidget):
def __init__(self):
super(BigProgram, self).__init__()
self.show()
# additional background tasks ...
progress = QProgressDialog(self)
# elements that move the progress...
self.login = Login(self)
self.login.exec() # This opens a dialog and collects the credentials
# etc.
if __name__.endswith('__main__'):
app = QCoreApplication.instance()
if app is None:
app = QApplication(sys.argv)
else:
app.close()
execute = BigProgram()
sys.exit(app.exec_())
The Login element:
class Login(QDialog):
signal = pyqtSignal(str, str, bool)
# Signal sent to another class, Login_Controller, which holds the control elements
def __init__(self, parent):
super(Login, self).__init__(parent)
self.root = parent
self.logic = Login_Controller(view=Login)
self.formGroupBox = QGroupBox('Login')
form_layout = QFormLayout()
self.username = QLineEdit()
self.username.setMinimumSize(600, 25)
form_layout.addRow(QLabel('E-mail:'), self.username)
self.password = QLineEdit()
self.password.setEchoMode(QLineEdit.Password)
form_layout.addRow(QLabel('Password:'), self.password)
self.formGroupBox.setLayout(form_layout)
buttonBox = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
buttonBox.accepted.connect(self._send_login)
buttonBox.rejected.connect(self.reject)
mainLayout = QVBoxLayout()
mainLayout.addWidget(self.formGroupBox)
mainLayout.addWidget(buttonBox)
self.setLayout(mainLayout)
self.setWindowTitle('User Login')
self.setWindowModality(Qt.ApplicationModal)
def _send_login(self):
self.signal.connect(self.logic.login)
self.signal.emit(self.username.text(), self.password.text())
# This closes the login_dialog box
self.password.clear()
self.close()
It works, the first time. Upon starting the program, the Login opens, inputs pass to Login_Controller and successfully authenticate the user, and a success message appears. When the user closes the success message, the login dialog also closes.
The problem is when a user logs out (call to Login_Controller to revoke tokens; it works) and logs in for a second time. User enters credentials, hits OK, authentication occurs, success message shows. Hit OK. Login dialog does not close, authentication occurs for a 2nd time, the success message shows. Hit OK. Now everything closes and seems okay. If the user logs out and logs in for the 3rd time, this repeats except with 3 authentications, not 2.
Pressing the login button triggers self.login.re_auth() which is simply
def re_auth(self):
self.show()
I'm not re-instantiating the Login class, but each time I use the re_auth() I seem to be creating an additional dialog.
Why is the self.close() not actually terminating this dialog? Is there a better way to do this?
Much thanks to any help!
