How does signal-slot implementation work in C++?

Can you explain what signal-slot implementation is in C++?

Sure! Signal-slot implementation is a design pattern used in C++ for communication between objects. It allows one object (the sender) to emit a signal, which can be connected to one or more slots (receivers) that respond to that signal.

How do I implement this in my C++ project?

To implement signal-slot in C++, you can use libraries like Qt, which provides a built-in mechanism. You define signals in your classes and connect them to slots using the connect() function.

Can you give me a simple code example?

Certainly! Here's a basic example:

#include <QObject>
#include <iostream>

class Sender : public QObject {
    Q_OBJECT
public:
    void sendSignal() {
        emit mySignal();
    }
signals:
    void mySignal();
};

class Receiver : public QObject {
    Q_OBJECT
public slots:
    void mySlot() {
        std::cout << "Signal received!" << std::endl;
    }
};

int main() {
    Sender sender;
    Receiver receiver;
    QObject::connect(&sender, &Sender::mySignal, &receiver, &Receiver::mySlot);
    sender.sendSignal();
    return 0;
}

What are the advantages of using signal-slot over traditional callbacks?

Using signal-slot provides better decoupling between components, making your code more modular and easier to maintain. It also allows for multiple slots to respond to a single signal, enhancing flexibility.