[Qt-qml] Q_INVOKABLE member function: Valid argument types

[Jonathan Zhong]

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






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