static QTimer

[Santosh Reddy]

Oh yes you got it wrong.

If I understand your problem, you have a base class say A, and there are different derived classes from it each wanting to connect to a common signal from base object but do derived class specific slot.

Will this example work?

//a.h
Class A
{
public:
    static QTimer *timer;
}
 
//a.cpp
#include "a.h"
QTimer * A::timer = new QTimer(0);
 
//b.h
Class B : public A
{
}
 
//b.cpp
#include "b.h"
B::B() : A() {
QObject::connect(timer, SIGNAL(timeout()), object, SLOT(object_slot()));
}

//a.h
Class A
{
public:
    static QTimer *timer;
}

//a.cpp
#include "a.h"
QTimer * A::timer = new QTimer(0);

//b.h
Class B : public A
{
}

//b.cpp
#include "b.h"
B::B() : A() {
QObject::connect(timer, SIGNAL(timeout()), object, SLOT(object_slot()));
}

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Anyway this is just a basic C++ problem, nothing to do with Qt, you better read more about C++ static class members.