Using ENUM as signal slot parameter in c++ / qml

bart6674

Hello,

i want to use my own enum as parameter for signal and slot functions.
The functions are used in c++ code and in qml code.

I'm getting this error message:
QObject::connect: No such signal QQuickWindowQmlImpl_QML_0::qmlOperatingMode( OperatingModes::Value ) in main.cpp:16

How can I resolve this problem?

Here is my code:
Enums.h
@
#ifndef ENUMS_H
#define ENUMS_H

#include <QtQml>

class OperatingModes : public QObject
{
Q_OBJECT
Q_ENUMS( Value )

public:
OperatingModes( QObject *parent = 0 );
enum Value {
IDManual,
IDAutomatic
};

private:
int Value_m;
};

Q_DECLARE_METATYPE( OperatingModes::Value )

#endif // ENUMS_H
@

MyClass.h
@
#ifndef MYCLASS_H
#define MYCLASS_H

#include <QObject>
#include <QtQml>
#include "Enums.h"

class MyClass : public QObject
{
Q_OBJECT

public:
MyClass( QObject *parent = 0 );
public slots:
void setOperatingMode( OperatingModes::Value );

signals:

private:
};

#endif // MYCLASS_H
@

MyClass.cpp
@
#include "MyClass.h"

MyClass::MyClass( QObject *parent ) : QObject( parent )
{
setOperatingMode( OperatingModes::IDAutomatic );
}

void MyClass::setOperatingMode( OperatingModes::Value value )
{
qDebug() << value;
}
@

main.cpp
@
#include <QGuiApplication>
#include <QQmlApplicationEngine>

#include "MyClass.h"

int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
MyClass myClass;

qmlRegisterType<OperatingModes>( "MyClass", 1, 0, "OperatingModes" );
qRegisterMetaType<OperatingModes::Value>("OperatingModes::Value");

engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
engine.connect( engine.rootObjects().first(), \
SIGNAL( qmlOperatingMode( OperatingModes::Value ) ), &myClass, \
SLOT( setOperatingMode( OperatingModes::Value ) ) );

return app.exec();

}
@

main.qml
@
import QtQuick 2.3
import QtQuick.Window 2.2

import MyClass 1.0

Window {
visible: true
width: 360
height: 360

signal qmlOperatingMode( OperatingModes myOperatingMode )

MouseArea {
    anchors.fill: parent
    onClicked: {
        qmlOperatingMode( OperatingModes.IDAutomatic )
    }
}

Text {
    text: qsTr("Hello World")
    anchors.centerIn: parent
}

}
@

DBoosalis

From the documentation on : "http://qt-project.org/doc/qt-5/qml-enumeration.html":http://qt-project.org/doc/qt-5/qml-enumeration.html

bq. Using the enumeration type in QML

The enumeration type is a representation of a C++ enum type. It is not possible to refer to the enumeration type in QML itself; instead, the int or var types can be used when referring to enumeration values from QML code.

bart6674

Thanks for this information.

So i can't use type save enum paramters in my c++ functions and must use int values like this?!

MyClass.h
@
(...)
public slots:
// doesn't work whith qml
void setOperatingMode( OperatingModes::Value );
// works with qml but is not type save
void setOperatingMode( int );
(...)
@