Send Var to Main thread



  • Hi
    How can I send Variable or data from worker Thread (or other Thread implementation ) to Gui (Main Thread)?
    I do vice versa (Gui Thread to other thread ) with signal/slot.



  • @Alexanov
    Thats exactly the way to do it:

    signals:
       void sendData(QVariant value);
    
    ...
    slots:
       void getData(QVariant value);
    
    
    //connect the 2
    
    connect(ObjectInThread1, &myThreadedClass1::sendData, ObjectInThread2, &mainThreadClass::getData, Qt::QueuedConnection);
    
    

    the with5th paramter is optional, but either leave it open aka Qt::AutoConnection or write Qt::QueuedConnection


  • Moderators

    @Alexanov There is no difference whether from main thread to other thread or from other thread to main thread.


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