检索PyQt4 QLabel mousepressevent的发送者

Question

I'm programming an interface in PyQt4 and I am using QLabels and making them clickable using the mousepressevent function. I have multiple labels (signals) that have the same mousepressevent slot. Here is the gist of what I'm trying to do.

class Example(QtGui.QWidget):
    def __init__(self):

        super(Example, self).__init__()
        self.initUI()

    def initUI(self):
         lbl1=QtGui.QLabel(self)
         lbl2=QtGui.QLabel(self)
         lbl1.mousePressEvent=self.exampleMousePress
         lbl2.mousePressEvent=self.exampleMousePress


    def exampleMousePress(self,event):
         print "The sender is: " + sender().text()

The problem is that the sender function is not working here. Is there a way to get the event sender in the exampleMousePress function?

Thank you all!

Answer 1

You can use event-filtering to do this:

class Example(QtGui.QWidget):
    def __init__(self):
        super(Example, self).__init__()
        self.initUI()

    def initUI(self):
        lbl1 = QtGui.QLabel(self)
        lbl2 = QtGui.QLabel(self)
        lbl1.installEventFilter(self)
        lbl2.installEventFilter(self)    

    def eventFilter(self, source, event):
        if event.type() == QtCore.QEvent.MouseButtonPress:
            print "The sender is:", source.text()
        return super(Example, self).eventFilter(source, event)