Python Qt6 - change font size at runtime

[PythonQTMarlem]

Re: Python Qt6 - change font size at runtime

This Code works:

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = HTMLGeneratorApp()
    window.setStyleSheet('font-size: 30px')
    window.show()
    app.setStyleSheet(
        """     QPushButton:focus { background-color: yellow }      QTextEdit:focus { background-color: yellow }     """)

    sys.exit(app.exec())

The Software changes the font-size.

This code doesn't work:

    def change_font_size(self, new_font_size):
        # Aktualisieren Sie die Schriftgröße für das Hauptfenster
        self.setStyleSheet(f'font-size: {new_font_size}px;')
        print(f"Ändere Schriftgröße auf: {new_font_size}")

The Software doesn't change the font-size.

what is wrong?

[PythonQTMarlem]

I figured it out:

def change_font_size(self, new_font_size):
        """
        Ändert die Schriftgröße im QMainWindow
        """

        fontsize = new_font_size
        self.setStyleSheet('font-size: ' + fontsize+'px')