Problem with Signal/Slot connections in derived classes

[hb]

I have a problem with Signal/Slot connections when a slot exists in a derived class, but not the baseclass. Imagine the following code, where class A is derived from QObject, and class B is derived from class A.

Class A:

#include <QObject>
 
class A : public QObject
{
	Q_OBJECT
 
public:
	A(QObject *parent = NULL);
	virtual ~A() {};
};
 
A::A(QObject *parent) : QObject(parent)
{
}

#include <QObject>

class A : public QObject
{
	Q_OBJECT

public:
	A(QObject *parent = NULL);
	virtual ~A() {};
};

A::A(QObject *parent) : QObject(parent)
{
}

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Class B:

#include "A.h"
 
class B : public A
{
public:
	B(QObject *parent = NULL);
	virtual ~B() {};
 
public slots:
void mySlot();
};
 
B::B(QObject *parent) : A(parent)
{
}
 
void B::mySlot()
{
	qDebug("B::mySlot called");
}

#include "A.h"

class B : public A
{
public:
	B(QObject *parent = NULL);
	virtual ~B() {};

public slots:
void mySlot();
};

B::B(QObject *parent) : A(parent)
{
}

void B::mySlot()
{
	qDebug("B::mySlot called");
}

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Now I want to create an instance of class B, and connect the slot defined in class B (but not in class A!) to a signal.

QApplication app(argc, argv);
B b;
QObject::connect(&app, SIGNAL(aboutToQuit()), &b, SLOT(mySlot()));

QApplication app(argc, argv);
B b;
QObject::connect(&app, SIGNAL(aboutToQuit()), &b, SLOT(mySlot()));

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Instead of the slot being called, I get the following warning in the debug output:

WARNING:	Object::connect: No such slot A::mySlot()
WARNING:	Object::connect:  (sender name:   'tst_Qt')

WARNING:	Object::connect: No such slot A::mySlot()
WARNING:	Object::connect:  (sender name:   'tst_Qt')

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Why does it try to connect to A::mySlot()? b is clearly an instance of B, not of A.
Qt is version 4.3.1. I'd be very happy about any hint to solve this problem..

[marcel]

Add the Q_OBJECT macro to B also.

[hb]

Ouch. That was really a stupid mistake. Thanks for your help!