Overloading QGraphicsView function from Qt Designer

[drumboy354]

Hello!

I'm having a bit of trouble with overloading a function for a QGraphicsView of mine. The QGraphicsView was created in Qt Designer and is called nodeDropWindow. In this example I'm trying to overload the wheelEvent but I just want to get anything working. This is in my mainForm() class where setupUI is called. From my understanding all I would have to implement is:

@pyqtSignature("QEvent")
def on_nodeDropWindow_wheelEvent(self, event):
        print("Hi!")

@pyqtSignature("QEvent")
def on_nodeDropWindow_wheelEvent(self, event):
        print("Hi!")

To copy to clipboard, switch view to plain text mode 

So what I"m trying to do is just get my console to print "Hi!" whenever I use my mouse wheel over the graphics window. This seems so simple to me but I can't get it working :-( Anybody have any ideas? Thanks!

[drumboy354]

No one has any ideas on how to hook up functions to a widget in Qt Designer? :-(

[drumboy354]

Sorry another response: I explained the problem in a lot more detail and posted some code if anyone cares :-)

http://www.qtforum.org/article/36967...tml#post115806

[norobro]

QGraphicsView::wheelEvent() is not a signal so there is nothing to connect. What you want to do is override wheelEvent() not overload it.

I've just dabbled in Python so I'm not sure this is correct, but at the bottom of your mainWindow class add the following and delete the "self.connect" statement:

// added this line so next line would indent
        self.nodeDropGraphicsView.wheelEvent = self.wheelEvent
 
    def wheelEvent(self,  event):
        print("wheel event")

// added this line so next line would indent
        self.nodeDropGraphicsView.wheelEvent = self.wheelEvent

    def wheelEvent(self,  event):
        print("wheel event")

To copy to clipboard, switch view to plain text mode 

[drumboy354]

Ohh man that was it! Dang okay I was definitely confusing the wheelEvent with a signal. Dang that's confusing. I think I was thinking that when the mouse wheel is scrolled it emits a signal (or something) and that's where I was getting confused. That makes a lot more sense, thanks a lot norobro!