QThread and QTimer

[wysota]

What i have mentioned here is it true ?

Yes.

Is the member function of testClass belongs to testClass thread or not ?

Functions do not belong to threads. Only objects do in the sense that a thread processes events of an object.

I am using signal slot to communicate between two thread .But the current thread id of mainwindow and startWork() slot are same.

That's because the QThread instance lives in the main thread so its slots are executed in the context of the main thread.

How i solve this?

Instead of subclassing QThread, create an instance of it, wrap the functionality you want into a QObject instance and move that object into the thread.

QThread t;
t.start();
Object *o = new Object;
o->moveToThread(&t);
connect(mainWin, SIGNAL(someSignal()), o, SLOT(doSomeWork()));

QThread t;
t.start();
Object *o = new Object;
o->moveToThread(&t);
connect(mainWin, SIGNAL(someSignal()), o, SLOT(doSomeWork()));

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[bibhukalyana]

Thanks for reply.

I tried like :

testClass *tCls = new testClass();
 
    QThread t;
    t.start();
    tCls->moveToThread(&t);
 
    QObject::connect(&w,SIGNAL(startSignal()),tCls,SLOT(startWork()),Qt::QueuedConnection);
    w.show();

testClass *tCls = new testClass();

    QThread t;
    t.start();
    tCls->moveToThread(&t);

    QObject::connect(&w,SIGNAL(startSignal()),tCls,SLOT(startWork()),Qt::QueuedConnection);
    w.show();

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I am getting segmentation fault.
Or will I take one more class and inherits QThread and after that execute movetoThread.

One more thing. It is working but I dont know this is corret or not .

tCls->moveToThread(tCls);
tCls->start(QThread::NormalPriority);

tCls->moveToThread(tCls);
tCls->start(QThread::NormalPriority);

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thanks.

[wysota]

testClass should inherit QObject and not QThread, that's for sure. If your program crashes then find the crash.

[bibhukalyana]

thanks it is my mistake.

Can you please tell me how to assing memory to timer so that it will belong to testClass thread ?
If after moveToThread i tried to call directly using object, but i get the same error.
But current thread id of startWork() and mainclass are different (thanks.. It is working).

[wysota]

You can never call the timer directly if you want it to be part of an object living in a different thread.