[PyQt] signals/slots don't work for QQuickItem derived class

[Alexander Rössler]

Hello everyone,

I have something weird happening.

Take a look at this code:

class WidgetController(QQuickItem):

    nameChanged = pyqtSignal(str)
    proxyChanged = pyqtSignal(WidgetProxy)

    def __init__(self, parent=None):
        super(WidgetController, self).__init__(parent)

        self._name = ''
        self._proxy = None
        self._widget = None

        self.nameChanged.connect(self._update_widget)
        self.proxyChanged.connect(self._update_widget)

...

    def _update_widget(self):
        if not self._proxy:
            return

        self._widget = self._proxy.widgets.get(self._name, None)

During instantiation from QtQuick I get following error:

QObject::connect: No such signal QQuickItem::nameChanged(QString)
Traceback (most recent call last):
  File ".../base/widgetcontroller.py", line 19, in __init__
    self.nameChanged.connect(self._update_widget)
TypeError: connect() failed between WidgetController.nameChanged[str]
and unislot()


Exactly the same code works as intended when I subclass QObject instead
of QQuickItem. What am I doing wrong here?

Best regards
Alexander


-- 
Alexander Rössler
HMI Expert at Rössler Systems
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alexander at roessler.systems
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