c++ - Registering Qt::[Enum/Flag] as QtMetaType -

i wanted create object access values of qmouseevent.

this event has e.g.

qt::mousebutton qmouseevent::button() const 

so add class myqmlmouseevent

q_property(qt::mousebutton button read button) 

and necessary getter.

i expected, on qml side, can use such:

myqmlmouseevent.button === qt.buttonleft 

as qt.buttonleft available, , used e.g. mousearea's clicked signal.

now test, handle signal in pass myqmlmouseevent-instance in qml this:

onmyqmlmousevent: console.log(json.stringify(mymouseevent)) 

which prints properties, fails on qt::mousebutton type. gives me error:

qmetaproperty::read: unable handle unregistered datatype 'qt::mousebutton' property 'myqmlmouseevent::button'

here might solve calling qregistermetatype register type.
unsure if in case right or work for

• qt available in qml - registering parts of again seems wrong me?
• can qregistermetatype enums , flags class have little control about?

---

intrestingly: fails qt::mousebutton , qt::mouseeventflags not qt:mousebuttons (which alias qt::mousebutton).
means circumvent problem qt::mousebutton changing type plural, , qt::mouseeventflags passed int indeed not available in qml (should qt.mouseeventcreateddoubleclick)

still, out of curiosity, , if might necessary in future: what right way register enums , flags qt namespace if not registered yet? don't want register them every time in main.cpp whenever use completly different class.

set q_property type int

there no need declare or register metatypes use enum.

c++

class mousebuttonobject : public qobject {     q_object     q_property(int button read button)  public:     explicit mousebuttonobject(qobject *parent = nullptr);      qt::mousebutton button() { return qt::leftbutton; } }; 

qml

if (mousebuttonobject.button === qt.leftbutton) {     console.log("button left button") }