Share enum between C++ and QML / header file

billouparis

Hello all,

I am aware about the following technique to share enum among C++ and QML:

@class MyClass : public QDeclarativeView
{

    Q_OBJECT
    Q_ENUMS(Tasks)
 
public:
    enum Tasks { Task1, Task2, Task3 };
}

In c++ file:
qmlRegisterType<MyClass>(...)
@

I would like to do exactly the same but with my enum definition being in an external .h file like:
@myFile.h
enum Tasks { Task1, Task2, Task3 };

now what should I do to get my enum recognized in my class?
#include "myFile.h"

class MyClass : public QDeclarativeView
{

    Q_OBJECT
    Q_ENUMS(Tasks)
 
public:
   --
}

In c++ file:
qmlRegisterType<MyClass>(...)

This compiles alright, but the enum values are undefined when using them in the QML part
@

Any solution for this?
Thank you!

Bill

andre

The only thing I can think of, is to pull dirty tricks on moc. Qt itself does this: it pretends that it is dealing with QObjects on the moc run, but not in the compile run. Q_ENUMS only works in the context of a QObject...

billouparis

found an ugly workaround too:
declared a QObject class in my enum header file like this:
@
myFile.h
class MyEnum: public QObject
{
Q_OBJECT
Q_ENUMS(someEnum)

pubilc:
enum someEnum {A, B, C}
}
typedef MyEnum::someEnum t_someEnum;

In some C++ file that requires this enum type
cppFile.h
#include myFile.h
class SomeClass
{
public:
t_someEnum mEnum;
}
when defining a method requiring one of the value use
mEnum = MyEnum::A;

In the C++ files that will register the qml enum, simply include the myFile in the header file MyClass.h, in the constructor register the enum for qml with qmlRegisterType<..>("...",1,0,"QMLENUM")
Now use the enum values A, B, C directly in QML by calling QMLENUM.A for instance.
@