QObject::connect returns false

[JonB]

@SPlatten
Like I said, have you done a delete and fresh rebuild?
Does clsTimeEmu have Q_OBJECT in it?

[SPlatten]

@J-Hilk , @JonB , @KroMignon , I've looked at both moc files, moc_clsTimeEmu.cpp has the signal:

// SIGNAL_0
void clsTimeEmu::epoch(int _t1)
{
    void *_a[] = { 0, const_cast<void*>reinterpret_cast<const void*>(&_t)) };
    QMetaObject::activate(this, &staticMetaObject, 0, _a);
}

moc_clsSchdSrv.cpp does not have anything that looks like the slot, no mention of updateTime at all, why ?

[J.Hilk]

@SPlatten well, can you post more of the clsSchdSrv header ?

[KroMignon]

@SPlatten said in QObject::connect returns false:

moc_clsSchdSrv.cpp does not have anything that looks like the slot, no mention of updateTime at all, why ?

Some time Qt-Creator do not detect changes is HEADERS files, so moc will not be re-run.
This is why I suggest you to try to re-run yourself qmake and, if this not help, remove the build directory (as also suggested by @JonB ) to force full rebuild (with moc).

But first, make sure all headers are present in HEADERS of your PRO file.

[SPlatten]

@J-Hilk , clsSchdSrv.h, still a early work in progress:

class clsSchdSrv : public QTimer {
    Q_OBJECT

public:
    explicit clsSchdSrv(QObject* pParent = 0);
    void kick();

public slots:
    virtual void expired() = 0;
}

Sorry, should have added:

class clsTimeSync : public clsSchdSrv {
public:
    explicit clsTimeSync();

public slots:
    virtual void expired();
    void updateTime(int intTimeNow);
}

[JonB]

@SPlatten
We have all said several times to try a complete delete and re-build.....

[jsulm]

@SPlatten You should see a warning at runtime when connect is executed: what does it say?

[SPlatten]

@KroMignon, I deleted the content of the build folder , checking for any hidden files, then ran clean, remake and build, same results.

[J.Hilk]

@SPlatten if thats the header, than I as well fail to see the slot void updateTime(long); declaration ;)

[JonB]

@SPlatten said in QObject::connect returns false:

public slots:
virtual void expired() = 0;

But you use SLOT(updateTime())?

Why are you showing us clsSchdSrv? Earlier you showed clsTimeSync?

[KroMignon]

@SPlatten said in QObject::connect returns false:

clsSchdSrv.h, still a early work in progress:

I am not sure, you can declare a slot as virtual.
I would change this to:

class clsSchdSrv : public QTimer {
    Q_OBJECT

public:
    explicit clsSchdSrv(QObject* pParent = 0);
    void kick();

public:
     virtual void  onExpired() = 0;
public slots:
    void expired() {  onExpired(); } 
}

[SPlatten]

@JonB , please see the edited post which includes the derived class, sorry.

[J.Hilk]

@SPlatten your derived class will need the Q_OBJECT macro as well, if it defines slots/signals

[KroMignon]

@SPlatten said in QObject::connect returns false:

please see the edited post which includes the derived class, sorry.

In this header signal signature is void updateTime(int) and not void updateTime(long)

[JonB]

@SPlatten
class clsTimeSync : public clsSchdSrv {
Although updateTime() is only a slot and not a signal, you do not have Q_OBJECT in this class. Does it help if you do (and then rebuild from scratch)?

[JonB]

@KroMignon said in QObject::connect returns false:

In this header signal signature is void updateTime(int) and not void updateTime(long)

That's coz he has changed per earlier on.
I agree we do not know for sure what his code is, but I think he dealt with that alteration.

[SPlatten]

@J-Hilk , why? The class it inherits already has that.

[SPlatten]

@KroMignon , because I changed it from long to int after earlier posts.

[JonB]

@SPlatten said in QObject::connect returns false:

@J-Hilk , why? The class it inherits already has that.

That's not how it works. Which is why I said to try putting Q_OBJECT in.

Can you please do that and then we will discuss why if it makes any difference?

[SPlatten]

@JonB , adding Q_OBJECT to the inherit class results in the compiler error:

undefined erference to `vtable for clsTimeSync`