i_qptr.h

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#ifndef i_qptr_h
#define i_qptr_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        Kristofer Tingdahl
 Date:          November 2012
________________________________________________________________________

-*/

#include "notify.h"
#include <QObject>

QT_BEGIN_NAMESPACE

class i_QPtrImpl : public QObject, public CallBacker
{
    Q_OBJECT

public:

    Notifier<i_QPtrImpl> notifier_;
    Threads::Lock       lock_;

    QObject*            ptr()                           { return sender_; }
    const QObject*      ptr() const                     { return sender_; }


                        operator QObject*()             { return sender_; }
                        operator const QObject*() const { return sender_; }
    QObject*            operator->()                    { return sender_; }
    QObject*            operator->() const              { return sender_; }
    QObject*            operator=(QObject* qo)          { set( qo ); return qo;}

    Threads::Lock&      objLock()                       { return lock_; }


    void                set(QObject* qo);
                        i_QPtrImpl( QObject* sndr = 0 );
                        ~i_QPtrImpl();

private:

    QObject*            sender_;

private slots:

    void                destroyed( QObject* )
                        {
                            notifier_.trigger();
                            Threads::Locker lckr( lock_ );
                            sender_ = 0;
                        }

};

QT_END_NAMESPACE

#endif