Python, Qt6 and QFormLayout - What I have done wrong?

PythonQTMarlem

Hello,

Python Qt6.
My code:

    def GUI(self):
      self.setWindowTitle("PyQt6 Telefonnummer-Verwaltung")
      self.setGeometry(500, 300, 360, 250)
      self.setAccessibleDescription("Programmfenster für PyQt6 Telefonnummer-Verwaltung")

      self.toolbar = self.addToolBar("PyQt6 Telefonnummer-Verwaltung")
      self.lbl_schriftgroessen = QLabel('&Schriftgröße  ', self)
      self.lbl_schriftgroessen.setStyleSheet("font-size: 20px")
      self.lbl_schriftgroessen.setAccessibleDescription('Beschriftung für Aufklappbare Liste Schriftgröße')
      schriftgroessen = ["10", "12", "14", "16", "18", "20", "22", "24", "26", "28", "30", "32", "34", "36", "38",
                           "40"]
      schriftgroessen.sort()
      self.cbxschriftgroesse = QComboBox(self)
      self.cbxschriftgroesse.setStyleSheet('font-size: 20px')
      self.cbxschriftgroesse.setAccessibleDescription('Auswahlliste für Schriftgröße')
      self.cbxschriftgroesse.addItems(schriftgroessen)
      self.cbxschriftgroesse.setCurrentIndex(5)
      self.cbxschriftgroesse.currentIndexChanged.connect(self.schrift_aendern)
      self.toolbar.addWidget(self.lbl_schriftgroessen)
      self.toolbar.addWidget(self.cbxschriftgroesse)
      self.lbl_schriftgroessen.setBuddy(self.cbxschriftgroesse)

      self.edt_vorname = QLineEdit(self)
      self.edt_vorname.setStyleSheet('font-size: 20px')
      self.edt_vorname.setAccessibleDescription('Eingabefeld für Vorname')

      self.lbl_vorname = QLabel('&Vorname:', self)
      self.lbl_vorname.setStyleSheet("font-size: 20px")
      self.lbl_vorname.setAccessibleDescription('Beschriftung für Eingabefeld Vorname')
      self.lbl_vorname.setBuddy(self.edt_vorname)

      self.edt_nachname = QLineEdit(self)
      self.edt_nachname.setStyleSheet('font-size: 20px')
      self.edt_nachname.setAccessibleDescription('Eingabefeld für Nachname')

      self.lbl_nachname = QLabel('&Nachname:', self)
      self.lbl_nachname.setStyleSheet('font-size: 20px')
      self.lbl_nachname.setAccessibleDescription('Beschriftung für Eingabefeld Nachname')
      self.lbl_nachname.setBuddy(self.edt_nachname)

      self.edt_telefonnummer = QLineEdit(self)
      self.edt_telefonnummer.setStyleSheet("font-size: 20px")
      self.edt_telefonnummer.setAccessibleDescription('Eingabefeld fürTelefonnmummer')

      self.lbl_telefonnummer = QLabel('&Telefonnmummer:', self)
      self.lbl_telefonnummer.setStyleSheet('font-size: 20px')
      self.lbl_telefonnummer.setAccessibleDescription('Beschriftung für Eingabefeld Telefonnmummer')
      self.lbl_telefonnummer.setBuddy(self.edt_telefonnummer)

      self.btn_daten_exportieren = QPushButton("&Daten exportieren", self)
      self.btn_daten_exportieren.setStyleSheet('font-size: 20px')
      self.btn_daten_exportieren.setAccessibleDescription('Daten exportieren')
      self.btn_daten_exportieren.setToolTip('Eingabefelder in CSV-Datei Schreiben')
      self.btn_daten_exportieren.setDefault(True)
      self.btn_daten_exportieren.clicked.connect(self.csv_export)

      self.btn_programm_beenden = QPushButton("&Ende", self)
      self.btn_programm_beenden.setStyleSheet('font-size: 20px')
      self.btn_programm_beenden.setAccessibleDescription('Programm beenden')
      self.btn_programm_beenden.setToolTip('Programm beenden')
      self.btn_programm_beenden.setDefault(True)
      self.btn_programm_beenden.clicked.connect(self.programm_beeden)

      formLayout = QFormLayout()
      formLayout.addRow(self.lbl_vorname, self.edt_vorname)
      formLayout.addRow(self.lbl_nachname, self.edt_nachname)
      formLayout.addRow(self.lbl_telefonnummer, self.edt_telefonnummer)
      formLayout.addRow(self.btn_daten_exportieren, self.btn_programm_beenden)
      self.setLayout(formLayout)

      self.statusBar().showMessage("Status bereit")
      self.statusBar().setAccessibleDescription("Status bereit")

When I start the program, all labels and input fields are not displayed.

Question:
What I have done wrong?

SGaist

Hi,

I guess your main widget is based on a QMainWindow ? If so, you can't replace its layout.

PythonQTMarlem

class FensterKlasse(QMainWindow):

Yes, you guessed it! What should I do?

JonB

@PythonQTMarlem
Read the docs on QMainWindow if you intend to use it. Put a plain QWidget as its central widget, put your QFormLayout on that, if that is what you are wanting.

PythonQTMarlem

Thanks! It works. It works great!
But I also had to remove the status bar!

JonB

@PythonQTMarlem said in Python, Qt6 and QFormLayout - What I have done wrong?:

But I also had to remove the status bar!

I don't know why, a QMainWindow has a status bar just as you already were using one. Did you stop and take the time to read https://doc.qt.io/qt-6/qmainwindow.html#details ?

PythonQTMarlem

Thank you!