[Qt-interest] How to find out which SIGNAL was sent

[Rainer Wiesenfarth]

From: qt-interest-bounces at trolltech.com [mailto:qt-interest-
> how can I find out which signal was sent from a specific
> widget/QObject?
> 
> For example:
> connect (myWidget1, SIGNAL(sig1()), this, SLOT(doSomething()));
> connect (myWidget1, SIGNAL(sig2()), this, SLOT(doSomething()));
> connect (myWidget2, SIGNAL(sig1()), this, SLOT(doSomething()));
> connect (myWidget2, SIGNAL(sig2()), this, SLOT(doSomething()));
> 
> void MyClass::doSomething() {
>       qDebug() << sender(); // myWidget1, MyWidget2
> }
> 
> To find out the widget is simple, just call sender(), but how can I get
> the signal which was sent (in this example sig1() or sig2())?

Short answer: Don't!

Longer answer: One of the basics behind the signal/slot stuff is to enable
notifications between two objects that need (and should) not know each
other. If your receiver has to act different depending on the sender (and
signal) this may indicate a bad design.

Best Regards / Mit freundlichen Grüßen
Rainer Wiesenfarth

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