Q_DECLARE_INTERFACE and namespaces

[JPNaude]

Hi

I get the following error in regard to the interface below:

In file included from ../tmp/../source/IView.h:24,
from ../tmp/moc_IView.cpp:10:
../tmp/../source/IContext.h:42: error: expected identifier before string constant

In file included from ../tmp/../source/IView.h:24,
from ../tmp/moc_IView.cpp:10:
../tmp/../source/IContext.h:42: error: expected identifier before string constant

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This is my class:

#ifndef ICONTEXT_H
#define ICONTEXT_H
 
#include "ObjManagement_global.h"
#include <QString>
 
namespace Qtilities {
    namespace ObjManagement {
        namespace Interfaces {
            class OBJMANAGEMENT_SHARED_EXPORT IContext {
            public:
                virtual QString context() const = 0;
                virtual QString contextHelpId() const { return QString(); }
            };
        }
    }
}
 
Q_DECLARE_INTERFACE(Qtilities::ObjManagement::Interfaces::IContext,"com.Qtilities.ObjManagement.IContext/1.0")
 
#endif // ICONTEXT_H

#ifndef ICONTEXT_H
#define ICONTEXT_H

#include "ObjManagement_global.h"
#include <QString>

namespace Qtilities {
    namespace ObjManagement {
        namespace Interfaces {
            class OBJMANAGEMENT_SHARED_EXPORT IContext {
            public:
                virtual QString context() const = 0;
                virtual QString contextHelpId() const { return QString(); }
            };
        }
    }
}

Q_DECLARE_INTERFACE(Qtilities::ObjManagement::Interfaces::IContext,"com.Qtilities.ObjManagement.IContext/1.0")

#endif // ICONTEXT_H

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The interface is used in another interface, which class can inherit from and then implement IContext. This class is shown below:

#ifndef IVIEW_H
#define IVIEW_H
 
#include "ObjManagement_global.h"
#include "IContext.h"
 
#include <QWidget>
 
namespace Qtilities {
    namespace ObjManagement {
        namespace Interfaces {
            class OBJMANAGEMENT_SHARED_EXPORT IView : public QWidget, virtual public IContext
            {
                Q_OBJECT
                Q_INTERFACES(Qtilities::ObjManagement::Interfaces::IContext)
 
            public:
                IView(QWidget * parent = 0, Qt::WindowFlags f = 0) : QWidget(parent,f) {}
                virtual ~IView() {}
 
            signals:
                void appendContext(const QString& context);
                void removeContext(const QString& context);
            };
        }
    }
}
 
#endif // IVIEW_H

#ifndef IVIEW_H
#define IVIEW_H

#include "ObjManagement_global.h"
#include "IContext.h"

#include <QWidget>

namespace Qtilities {
    namespace ObjManagement {
        namespace Interfaces {
            class OBJMANAGEMENT_SHARED_EXPORT IView : public QWidget, virtual public IContext
            {
                Q_OBJECT
                Q_INTERFACES(Qtilities::ObjManagement::Interfaces::IContext)

            public:
                IView(QWidget * parent = 0, Qt::WindowFlags f = 0) : QWidget(parent,f) {}
                virtual ~IView() {}

            signals:
                void appendContext(const QString& context);
                void removeContext(const QString& context);
            };
        }
    }
}

#endif // IVIEW_H

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I suspect it has something to do with the namespaces? It has worked before but stopped working now and I can't figure out what changed.

Any inputs will be appreciated.

Thanks.
Jaco

[wysota]

Did you try declaring the interface inside the namespace?

namespace ... {
  class X ... { ... };
  Q_DECLARE_INTERFACE(X, "...");
}

namespace ... {
  class X ... { ... };
  Q_DECLARE_INTERFACE(X, "...");
}

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Alternatively you can just make your class inherit QObject and add Q_OBJECT macro, you won't need Q_DECLARE_INTERFACE then.

[sriky27]

Did you try declaring the interface inside the namespace?

namespace ... {
  class X ... { ... };
  Q_DECLARE_INTERFACE(X, "...");
}

namespace ... {
  class X ... { ... };
  Q_DECLARE_INTERFACE(X, "...");
}

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Alternatively you can just make your class inherit QObject and add Q_OBJECT macro, you won't need Q_DECLARE_INTERFACE then.

This worked for me

namespace ... {
  class X ... { ... };
 
}
using namespace ..;
Q_DECLARE_INTERFACE(X, "...");

namespace ... {
  class X ... { ... };

}
using namespace ..;
Q_DECLARE_INTERFACE(X, "...");

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