[Interest] Emitting signals from a different class

[Marian Beermann]

Typically the semantics of signals are "something changed about *this*
object". With those semantics it should generally be the object doing
the emitting.

There are of course other ways to use signals, e.g. as a makeshift
message-bus-ish system or to call a method in another slot (though
QMetaObject::invokeMethod() is a more direct way of accomplishing that).

On 14.08.2018 16:43, Christopher Probst wrote:
> Good Morning Fellow Qters,
> 
> This is basic question. I have always had the reflex of not emitting
> signals that belong to a separate class, even if signals are public. I,
> however don't know why I adopted this rule of thumb. Why do we very
> rarely emit signals from a different QObject?
> 
> Thanks,
> Christopher  
> 
> 
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