qt - Setting parent of a created qml object from C++ is not working -

i have c++ class creates qml object, takes 5 parameters:

//prototype  // q_invokable qquickitem *createqmlobject(qobject *parent, qstring path, qstring id="", int x=0, int y=0);  qquickitem * qmlitemcreator::createqmlobject(qobject* parent,qstring path,qstring id,int x,int y) {     qqmlengine engine;     qqmlcomponent component(&engine, qurl::fromlocalfile(path));     qquickitem * mainobject_;     if(component.iserror())     {         qwarning() << "qmlitemcreator::createqmlobject qmlcomponent "                    << path << " has errors: " << component.errorstring();     }     else if (component.isready())     {         mainobject_ = qobject_cast<qquickitem*>(component.create());         qqmlengine::setobjectownership(mainobject_, qqmlengine::javascriptownership);         mainobject_->setproperty("id",id);         mainobject_->setproperty("x",x);         mainobject_->setproperty("y",y);         mainobject_->setparent(parent);         // qdebug()<<mainobject_<<"  "<<mainobject_->parent()<<"  "<<mainobject_->property("x");     }     else     {         componentcomplete();     }      return mainobject_; } 

i use in qml follows:

 item{     id: idroot         component.oncompleted:        {             var obj = qmlcreator.createqmlobject(idroot,"path/test.qml")            console.log(obj.parent)// print null !!          }     } 

while in c++ context, can correctly print value of properties set, parent of created object. however, when print them qml, theparenthas anulland properties areundefined`.

i printed adress of created object c++ , qml , i've got same address. don't understand what's causing behaviour.

thanks help.

i've solved issue adding following line of code c++ code:

mainobject_->setparentitem(qobject_cast<qquickitem*>(parent));