Hi Jonathan, Q_INVOKABLEs are implements as slots in the C++ class, which means they are just method calls in the end. AFAIK you should be allowed to give a pointer to an integer if you so wish to a slot. Sounds like the runtime error (segfault?) comes from something else.
You cannot return values from Q_INVOKABLES as they are Qt slots which cannot return values. Cheers, Johan > Hi, > > What are the valid argument types of an invokable member function of a > QML extension C++ class? I have noticed that these work: > > Q_INVOKABLE void myFunc1(int myInputInt); > Q_INVOKABLE void myFunc2(int& myInputInt); // but myInputInt cannot > be modified. > > while this does not work: > > Q_INVOKABLE void myFunc3(int * myOutputInt); // This will cause a > runtime error when running qmlviewer. > > It appears that: > 1. The argument can be an object of (or reference to) a basic C/C++ data > type (int, int&, double, double&, ...). > 2. The argument can be an object or (or reference to) a Qt class which > relates to a basic QML type (QString, QString&, QVariant, QVariant&, ...). > 3. The argument can be a pointer to QObject or its derived classes > (QObject *, QWidget *, ...). > ... > > Is there a Qt documentation page on this subject? > > Perhaps this is a related question: What are the valid return types of > an invokable member function? > > > Thanks, > > Jonathan > > > > > > > Disclaimer: The information contained in this transmission, including any > attachments, may contain confidential information of Panasonic Avionics > Corporation. This transmission is intended only for the use of the > addressee(s) listed above. Unauthorized review, dissemination or other use > of the information contained in this transmission is strictly prohibited. > If you have received this transmission in error or have reason to believe > you are not authorized to receive it, please notify the sender by return > email and promptly delete the transmission. > > > _______________________________________________ > Qt-qml mailing list > Qt-qml@qt.nokia.com > http://lists.qt.nokia.com/mailman/listinfo/qt-qml _______________________________________________ Qt-qml mailing list Qt-qml@qt.nokia.com http://lists.qt.nokia.com/mailman/listinfo/qt-qml
