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
 RCS:           $Id$
________________________________________________________________________
 
-*/
 
#include "callback.h"
#include "threadlock.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