QScroller "stateChanged" event not triggered

stroblme

In my application, I have a QGraphicsView in which I can scoll Items using the QScroller:

self.graphicsScroller = QScroller()
self.graphicsScroller.grabGesture(self.viewport(), self.graphicsScroller.TouchGesture)

This works pretty well. However, if I want to subscribe to the stateChanged event:

self.graphicsScroller.stateChanged.connect(self.scrollerStateChanged)

To trigger the scrollerStateChanged method:

@Slot(QScroller.State)
def scrollerStateChanged(self, newState):
        print("scroller state changed")

This doesn't work.

I already tried the more convenient way by using QScroller without local reference:

QScroller.grabGesture(self.viewport(), QScroller.TouchGesture)
QScroller.stateChanged.connect(self.scrollerStateChanged)

Works for scrolling, but stateChanged event is not triggered.
Additionally I tried with lambda expressions, but also no result.

Am I'm missing something here?
Thanks in advance for any help on this!

SGaist

Hi and welcome to devnet,

I haven't used that class but based on the class documentation, I would guess the code should be something like:

QScroller.grabGesture(self.viewport(), QScroller.TouchGesture)
scroller = QScroller.scroller(self.viewport())
scroller.stateChanged.connect(self.scrollerStateChanged)

stroblme

@SGaist
Thanks a lot. Instantiation using

QScroller.scroller(self.viewport)

did the trick!
Sorry that I missed that.