Signal / Slot with specific argument and threads

[tpf80]

Have created a slot like shown below, in order to do something when a worker thread is done, but it must know which one finished:

void ProgramMain::serverDisconnectDone(int thread) {
 
}

void ProgramMain::serverDisconnectDone(int thread) {

}

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Since I know what signal comes from what thread, I wanted to connect them in this way:

connect(&thread1, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(1)));
connect(&thread2, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(2)));
connect(&thread3, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(3)));
connect(&thread4, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(4)));

connect(&thread1, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(1)));
connect(&thread2, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(2)));
connect(&thread3, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(3)));
connect(&thread4, SIGNAL(logoffDone()), this, SLOT(serverDisconnectDone(4)));

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When I execute my program I get the error:

Object::connect: No such slot ProgramMain::serverDisconnectDone(1)
Object::connect: (receiver name: 'ProgramMain')
Object::connect: No such slot ProgramMain::serverDisconnectDone(2)
Object::connect: (receiver name: 'ProgramMain')
Object::connect: No such slot ProgramMain::serverDisconnectDone(3)
Object::connect: (receiver name: 'ProgramMain')
Object::connect: No such slot ProgramMain::serverDisconnectDone(4)
Object::connect: (receiver name: 'ProgramMain')

I know that there are more complicated ways that I could make this work, but the easiest way is to just force the argument in the signal slot connection. Is there any way that I can do this?

[wysota]

Take a look at QSignalMapper.

[tpf80]

Nice! at least by reading the description for it, this looks like its perfect for what I need. I will see if I can impliment it right away.

[tpf80]

Yes this worked perfectly! Here is the solution I used in case anyone later wants to know about it:

QSignalMapper* mapper = new QSignalMapper(this);
 
mapper->setMapping(&thread1, 1);
mapper->setMapping(&thread2, 2);
mapper->setMapping(&thread3, 3);
mapper->setMapping(&thread4, 4);
 
connect(&thread1, SIGNAL(logoffDone()), mapper, SLOT(map()));
connect(&thread2, SIGNAL(logoffDone()), mapper, SLOT(map()));
connect(&thread3, SIGNAL(logoffDone()), mapper, SLOT(map()));
connect(&thread4, SIGNAL(logoffDone()), mapper, SLOT(map()));
 
connect(mapper, SIGNAL(mapped(int)), this, SLOT(serverDisconnectDone(int)));

QSignalMapper* mapper = new QSignalMapper(this);
	
mapper->setMapping(&thread1, 1);
mapper->setMapping(&thread2, 2);
mapper->setMapping(&thread3, 3);
mapper->setMapping(&thread4, 4);
	
connect(&thread1, SIGNAL(logoffDone()), mapper, SLOT(map()));
connect(&thread2, SIGNAL(logoffDone()), mapper, SLOT(map()));
connect(&thread3, SIGNAL(logoffDone()), mapper, SLOT(map()));
connect(&thread4, SIGNAL(logoffDone()), mapper, SLOT(map()));
	
connect(mapper, SIGNAL(mapped(int)), this, SLOT(serverDisconnectDone(int)));

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Thanks again for pointing me in the right direction!