signals and slot...can i select my option ?

[salmanmanekia]

hi..
i am writting this statement but it doesnt seem to work..

void Control::connectButton()
{ 
connect(accept,SIGNAL(clicked()),SIGNAL(buttonConnected(0)));
}
..
connect(contrl,SIGNAL(buttonConnected(int)),training,SLOT(informRecord(int)));

void Control::connectButton()
{ 
connect(accept,SIGNAL(clicked()),SIGNAL(buttonConnected(0)));
}
..
connect(contrl,SIGNAL(buttonConnected(int)),training,SLOT(informRecord(int)));

To copy to clipboard, switch view to plain text mode 

.
first my question are the above statement correct ?
my main purpose of putting 0 in the buttonConnected parameter is that that i can use it as option/choice i.e for selection
like i want to do also
connect(reject,SIGNAL(clicked()),SIGNAL(buttonConn ected(1)));
so if its accept buttonConnected() passes with 0 and if itz reject buttonConnected() passes with 1..

[wysota]

http://www.qtcentre.org/forum/faq.ph...ot_with_values

[salmanmanekia]

now i am trying this way but it also seems not working

void Control::connectButton()
{ 
	if (connect(accept,SIGNAL(clicked()),this,SLOT(checkOption(int))))
	checkOption(0);
}
void Control::checkOption(int option)
{
if (option == 0)
	emit buttonConnected(0);
}

void Control::connectButton()
{ 
	if (connect(accept,SIGNAL(clicked()),this,SLOT(checkOption(int))))
	checkOption(0);
}
void Control::checkOption(int option)
{
if (option == 0)
	emit buttonConnected(0);
}

To copy to clipboard, switch view to plain text mode 

..
connect(contrl,SIGNAL(buttonConnected(int)),training,SLOT(informRecord(int)));
..

..
connect(contrl,SIGNAL(buttonConnected(int)),training,SLOT(informRecord(int)));
..

To copy to clipboard, switch view to plain text mode 

[wysota]

Qt should send a warning to your console in case something is wrong with the connection. So be sure to have console support activated and look for errors there. Did you remember about the Q_OBJECT macro and declaring appropriate symbols as slots and signals?

[salmanmanekia]

i just debug my code on eclipse and it shows me this warnings..

Current language: auto; currently c++
warning: QObject::connect: Incompatible sender/receiver arguments
QPushButton::clicked() --> Control::checkOption(int)

Quit (expect signal SIGINT when the program is resumed)

i am confused about one thing from very start that can the 'if' statement be placed in this way...i mean is it correct to place 'if' in this manner..

[lyuts]

The signature of the slot should be either the same as the signature of the signal, or shorter. So,

connect(accept,SIGNAL(clicked()),this,SLOT(checkOption(int))

connect(accept,SIGNAL(clicked()),this,SLOT(checkOption(int))

To copy to clipboard, switch view to plain text mode 

is unacceptable.

[spirit]

that is what in a book "C++ GUI Programming with Qt 4, Second Edition
by Jasmin Blanchette; Mark Summerfield " is written:

To successfully connect a signal to a slot (or to another signal), they must have the same parameter types in the same order:

connect(ftp, SIGNAL(rawCommandReply(int, const QString &)),
this, SLOT(processReply(int, const QString &)));


Exceptionally, if a signal has more parameters than the slot it is connected to, the additional parameters are simply ignored:

connect(ftp, SIGNAL(rawCommandReply(int, const QString &)),
this, SLOT(checkErrorCode(int)));


If the parameter types are incompatible, or if the signal or the slot doesn't exist, Qt will issue a warning at run-time if the application is built in debug mode. Similarly, Qt will give a warning if parameter names are included in the signal or slot signatures.

[wysota]

I suggest you take a look at QSignalMapper, maybe you're trying to mimic what the class already does.

[salmanmanekia]

thanks every1...QSignalMapper solved it