What is the actual use of connectNotify and bool QApplication::notify ?

[tuvix]

Ok, this is very useful example.
This does help to make it clear. Thank you for the valuable help. I think I see the idea now.

[Hareen Laks]

I had the same question when I read this.

I understand connectNotify() and disconnectNotify () as below.

MyClass.h

'void connectNotify(const char *signal);'

MyClass.cpp

'void MyClass::connectNotify(const char *signal)
{
//find the signal connected as in documentation
if (signal == QMetaMethod::fromSignal(&MyObject::valueChanged)) {
// signal is valueChanged
}
}'

Is this correct?