[Qt-interest] Runtime Error :- connect: No such slot (Update)

[Wm. G. Urquhart]

Andreas Pakulat wrote:
> On 20.02.10 08:41:21, Wm. G. Urquhart wrote:
>> Well this get weirder and weirder. In my code I have an existing slot 
>> declared as:
>>
>> void typeChanged(int) ;
>>
>> when I 're-wire' my connect(...) to this slot it works, however; if I 
>> change the code to use setLegendIndex(int) the connect(...) fails!
>>
>> Object::connect: No such slot MyApp::setLegendIndex(int) in myapp.cpp:302
>> Object::connect:  (receiver name: 'MyApp')
>>
>> With setLegendIndex being declared thus:
>>
>> void setLegendIndex(int msg) ;
>>
>> and implemented using this:
>>
>> void MyApp::setLegendIndex(int msg)
>> {
>> 	::QMessageBox::information(this, "Set Legend", tr("Value is 
>> %1").arg(msg)) ;
>> }
>>
>> It was suspected that setLegendIndex was getting 'optimised' out but as 
>> I use an if (...) to connect the signal I call the function when it fails:
>>
>> pTest = new SignalTest() ;
>> if (connect(pTest, SIGNAL(Boo(int)), this, SLOT(setLegendIndex(int)), 
>> Qt::ConnectionType::QueuedConnection))
>> {
>> 	pTest->Start() ;
>> }
>> else
>> {
>> 	setLegendIndex(5) ;
>> }
>>
>> If I could be any more confused I would be, does anyone have any 
>> suggestions here?
> 
> Is setLegendIndex also declared as a slot? Did you forget the Q_OBJECT
> macro? If neither of these two is the problem please post a complete
> example showing the problem.
> 
> Andreas
> 

Hi Andreas,

You can see from the original thread that I have checked all of the 
obvious things, setLegendIndex is declared as a SLOT and appears in the 
MOC'd output:

case 55: setLegendIndex((*reinterpret_cast< int(*)>(_a[1]))); break;

as does the working slot:

case 42: typeChanged((*reinterpret_cast< int(*)>(_a[1]))); break;

The problem with providing an example is I can't as both of my test 
cases work!