[Solved] PyQt Signals

needhelp_gh

Hi,

When I put this piece of code in my PyQt python script:

@widget.connect(comboBox, QtCore.SIGNAL("activated(QString)"), function(param))@

It complains this error:

bq. widget.connect(comboBox, QtCore.SIGNAL("activated(QString)"), function(param))
TypeError: argument 3 of QObject.connect() has an invalid type

Is there any way I can have my function with parameters or is the only way:

@widget.connect(comboBox, QtCore.SIGNAL("activated(QString)"), function)@

Thanks!!

needhelp_gh

Any thoughts? Please & thank you!

tw55413

try :

comboBox.activated.connect( function )

needhelp_gh

Thanks for the reply!

I tried this:

@def test(num):
print num
...
comboBox.activated.connect( test(1) )@

Got this error:

connect() slot argument should be a callable or a signal, not 'NoneType'

needhelp_gh

Any other ideas?

Thx!!

jazzycamel

The connect function expects a reference to a function, what you are doing is passing it the result of a function. The simple case is:

@comboBox.activated.connect(test)@

If you want to pass a parameter to the slot function then you need to use a lambda as follows:

@comboBox.activated.connect(lambda: test(1))@

If you want to pass a variable rather than a static value then:

@
x=10
comboBox.activated.connect(lambda: test(x))
@

needhelp_gh

Thanks so much for the reply/answer :) It works!!!