QComboBox Signals doesn't invoke the called function

[ladiesfinger]

I'm using PyQt .

I had two comboboxes . First combobox has seven commands as text . Each command has its own options . ( i'll put options in the second combobox )

if user clicks commands combobox , then only the second combobox should appear with appropriate options loaded on it.

To do this action , i've tried to connect the 'changing' event with the function that implements the second combobox .

But , the function doesn't get invoked ..... ( i can't figure out what problem is )


i'll paste the code here :

self.connect(self.command,QtCore.SIGNAL('editTextChanged()'),self.optionopen)

self.connect(self.command,QtCore.SIGNAL('editTextChanged()'),self.optionopen)

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called function :

def optionopen(self):
    self.optionlab=QtGui.QLabel('Option:',self)
    self.loc.addWidget(self.optionlab,4,10)
    self.option=QtGui.QComboBox(self)
    self.loc.addWidget(self.option,4,14)
    self.option.insertItems(268,list)
    self.setLayout(self.loc)

def optionopen(self):
    self.optionlab=QtGui.QLabel('Option:',self)
    self.loc.addWidget(self.optionlab,4,10)
    self.option=QtGui.QComboBox(self)
    self.loc.addWidget(self.option,4,14)
    self.option.insertItems(268,list)
    self.setLayout(self.loc)

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I've tried out following functions:

changeEvent()
activated()
currentIndexChanged()
and finally
editTextChanged()

Plz , help me out .....
Any suggestions are welcome....

[high_flyer]

self.connect(self.command,QtCore.SIGNAL('editTextChanged()'),self.optionopen)

self.connect(self.command,QtCore.SIGNAL('editTextChanged()'),self.optionopen)

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I haven't done anything with python, so I don't know anything about it syntax, but where is the SLOT() parameter?
if optionopen() is a slot, it should be defined as such, and also in the connect statement it should be given as QtCore.SLOT().

[ladiesfinger]

usually , i didn't give SLOT() parameter in python ( in c++ , i did give )

I've implemented a push button previously , connected it to a function processimg as:

self.connect(self.process,QtCore.SIGNAL('clicked()'),self.processimg)

self.connect(self.process,QtCore.SIGNAL('clicked()'),self.processimg)

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It worked superb ....

but this function doesn't get invoked .

proper function for event changing of a combobox ?

[high_flyer]

all the signals you mentioned have a prameter, yet in your code your are connecting a signal without parameters, which does not exist - look in your console or debug output for any runtim signal/slot warnings.
Also, I would use the signal: void currentIndexChanged ( const QString & text ).

[ladiesfinger]

As you mentioned , i tried to give parameters to the signal

TypeError: C++ type 'argument' is not supported as a slot argument type


( i think i should figure out a way to provide slots in python)

Well , thank u for your instant replies

[AlexSudnik]

Hey,

What does connection operation return?I mean,maybe there is a problem with the slot execution rather then with connection establishment. Try to place a print("Slot is called") or smth. to check it...

[ladiesfinger]

thank u alex, that was a good idea .
And i have done that => The slot itself is not called

It is a mistake in calling statement . Still can't figure out

---

Added after 40 minutes:

i Got itttttttttt.

It's simple :

self.connect(self.command,QtCore.SIGNAL('activated(QString)'),self.optionopen)

self.connect(self.command,QtCore.SIGNAL('activated(QString)'),self.optionopen)

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Just passed QString as a parameter . ( When i used QtCore.SLOT('optionopen(self)') , it didn't work . )