[PyQt] signal propagating
Eric Frederich
eric.frederich at gmail.com
Tue Sep 28 22:00:13 BST 2010
Hello,
Here's a stripped down example of my problem.
I have a group of widgets that I keep together with a class called
MyWidgetGroup.
It holds a line edit and a label which together have a meaning (getMeaning)
but by themselves mean nothing.
I need to make connections to a method so it'll get called whenever the
widget's text changes but I don't want the reference to the line edit, I
want the reference to the widget group (so I can getMeaning on it).
To do this I wound up creating a dummy method that just propagates the
signal so that it comes from the widget group instead of just the line edit.
I have a bad feeling about this. There must be a better way to do this
right?
Can this be accomplished by connecting signals to signals?
class MyWidgetGroup(QWidget):
def __init__(self, parent=None):
super(MyWidgetGroup, self).__init__(parent)
self.myLabel = MyLabel(self)
self.myEdit = MyLineEdit(self)
self.connect(self.myEdit, SIGNAL("textChanged(QString)"),
self.pointless)
def pointless(self, qstring):
self.emit(SIGNAL("theValueChanged"))
def getMeaning(self):
return self.myLabel.text() + '-' + self.myEdit.text()
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