Passing additional arguments to a slot in pyqt4

[pazgs]

Hi,

In my current code, when the user highlights an item in a combo box, the index gets passed to a function like so below:

self.tab2TrajectoryCombo.highlighted.connect(self. trajectorychanged)
.
.
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def trajectorychanged(self, value):
'''trajectory changed'''

self.pcgraphs.changetrajectory(int(str(value)))
self.tab2TrajectoryCombo.setCurrentIndex(int(str(v alue)))
self.tab3TrajectoryCombo.setCurrentIndex(int(str(v alue)))

The above works nicely. However, I want to pass an argument to the function in addition to the index from the combobox. So I would do something like:

self.tab2TrajectoryCombo.highlighted.connect(lambd a: self.trajectorychanged(2))
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.
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def trajectorychanged(self, value, numbertwo):
'''trajectory changed'''

self.pcgraphs.changetrajectory(int(str(value)))
self.tab2TrajectoryCombo.setCurrentIndex(numbertwo )
self.tab3TrajectoryCombo.setCurrentIndex(numbertwo )

The above code doesn't work though. The error is:

Traceback (most recent call last):
File "/users/gareths/workspace/pyPczplotGUINew/tabwidget.py", line 55, in <lambda>
self.tab2TrajectoryCombo.highlighted.connect(lambd a: self.trajectorychanged(2))
TypeError: trajectorychanged() takes exactly 3 arguments (2 given)

Does anyone know how to do this?

Many thanks in advance

[anda_skoa]

Is the value associated with the entry in the combobox or with the location on where you make the connect?

If the former: you can attach any data to a combobox entry using the setItemData() method and retrieve it again with itemData().

Btw: in you attempt you are using that other value to change the value of the combobox again, leading to yet another change signal emit

Cheers,
_