Russian Qt Forum

class A : QObject
{
Q_OBJECT
public:
	void Print();
        A(){
                a1 = rand();};
	ModifiA1(int _a1){
		a1 = _a1;
		emit SignalS(a1);};
signal:
	SignalS(int Data);
public slots:
	SlotS(int Data){
		a2 = Data;};
private:
	int a1,a2;
};

class B : QObject
{
Q_OBJECT
public:
	B(){
		a1 = new A;
		a2 = new A;
		connect(a1, SIGNAL(SignalS(int)), a2, SLOT(SlotS(int));
		connect(a2, SIGNAL(SignalS(int)), a1, SLOT(SlotS(int));};
	ModifiA1(int a){
		a1.ModifiA1(a);
	}
	ModifiA2(int a){
		a2.ModifiA1(a);
	}
private:
	A *a1,*a2;
}

#ifndef QTESTCLASS_H
#define QTESTCLASS_H

#include <QObject>

class QTestClass : public QObject
{
    Q_OBJECT
public:
    explicit QTestClass(QObject *parent = 0);

    void CallSignl(int a);
protected:
    virtual void connectNotify(const char *signal);
signals:
    void TestSignal(int a);
public slots:
    void TestSlot(int a);
};

#endif // QTESTCLASS_H

#include "QTestClass.h"
#include <iostream>
#include <QLatin1String>

using namespace std;

QTestClass::QTestClass(QObject *parent) : QObject(parent)
{
}
void QTestClass::CallSignl(int a)
{
    emit TestSignal(a);
}
void QTestClass::connectNotify(const char *signal)
{
     if (QLatin1String(signal) == SIGNAL(TestSignal(int))) {
        cout<<"Сигнал был соединен со слотом"<<endl;
     }
}

void QTestClass::TestSlot(int a)
{
    cout<<a<<endl;
}

#include <QApplication>
#include <QObject>
#include "QTestClass.h"


int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    QTestClass *a = new QTestClass;

    QObject::connect(a, SIGNAL(TestSignal(int)), a, SLOT(TestSlot(int)));
    a->CallSignl(10);
    QObject::connect(a, SIGNAL(TestSignal(int)), a, SLOT(TestSlot(int)));
    a->CallSignl(15);
    return app.exec();
}