CODEWITHSUNDEEP
c++qtoverridingsubclasssignals-slots
Tony the Pony
Tony the Pony

Reputation: 41347

How to process signals in a Qt subclass?

How do I process a signal of in a subclass? Let's say my subclass is derived from QTextEdit and is interested in the signal textChanged. It seems silly to connect an object to itself, I should be able to simply override the textChange method -- but it isn't virtual.

What is the accepted way to do this?

Upvotes: 12

Views: 4915

Answers (3)

codinguser
codinguser

Reputation: 5572

It is perfectly ok to connect a signal to a slot in the same class. So implement your slot and connect it to textChanged(QString)

Upvotes: 1

Frank Osterfeld
Frank Osterfeld

Reputation: 25155

You can't implement/override a signal, so the only way is to create a new slot and connect it to textChanged():

connect( this, SIGNAL(textChanged(QString)), this, SLOT(slotTextChanged(QString)) );

Upvotes: 12

Jérôme
Jérôme

Reputation: 27027

Maybe it seems silly, but that's the way I did it : connecting my derived class to the signal emited by the parent class.

But I'm interested if there are any other solutions !

Upvotes: 2

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