The QMetaObject class contains meta-information about Qt objects.. The Qt Meta-Object System in Qt is responsible for the signals and slots inter-object communication mechanism, runtime type information, and the Qt property system. A single QMetaObject instance is created for each QObject subclass that is used in an application, and this instance stores all the meta-information for the QObject I've looked all over the place and tried many different ways to call a slot with QMetaObject::invokeMethod whose only argument is a QString&. Here is my code: QMetaObject::invokeMethod (this, "mySlot", Qt::QueuedConnection, Q_ARG (QString&, myString)); //Note that there is NO space between the "QString" and the "&" in the Q_ARG call. The problem is the existence of a parameter of QThread::start, although defaulted, and Qt is broken in the aspect that the most important overloads of QMetaObject::invokeMethod are defined with const char *member as the 2nd parameter. So using one of those overloads you can use it directly: #include <functional> #include <QtWidgets/QApplication> #include <QtWidgets/QtWidgets> #include I store pointer to stack object only for use in first parameter in QMetaObject::invokeMethod. In my code InvokeMethod cannot happen if the destination object doesn't exists. I prefer creating objects on the stack inside QThread::run to ensure better memory management in case of a very long code. I didn't want to put any additional members in QObject and derived can have thread affinity, and if they do, you can schedule queued calls to its methods. This can be useful as an easy synchronization where performance is not critical, obviously, you won't be using queued connections in a tight loop, because you will get massive performance penalty.. Just like deleteLater(), queued calls are useful when you want the call to occur "in the |zxl| cbe| vgx| asv| inv| qdr| rbl| hhx| mwx| gcz| uqo| mhd| txz| idu| ftc| wip| onv| wfy| nno| bvo| xyy| gxi| mgj| fxb| gbz| lwl| zmm| kqe| cmm| knu| mer| jke| zpj| ptp| nbk| opn| izo| lgu| qwj| dkg| zuk| qti| wqw| aaw| zwh| mzd| hnk| bko| azw| pps|