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# qptrqueue.h

This is the verbatim text of the qptrqueue.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id$
    **
    ** Definition of QPtrQueue template/macro class
    **
    ** Created : 920917
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the tools module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
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    **********************************************************************/

    #ifndef QPTRQUEUE_H
    #define QPTRQUEUE_H

    #ifndef QT_H
    #include "qglist.h"
    #endif // QT_H

    template<class type>
    class QPtrQueue : protected QGList
    {
    public:
        QPtrQueue()				{}
        QPtrQueue( const QPtrQueue<type> &q ) : QGList(q) {}
        ~QPtrQueue()			{ clear(); }
        QPtrQueue<type>& operator=(const QPtrQueue<type> &q)
    			{ return (QPtrQueue<type>&)QGList::operator=(q); }
        bool  autoDelete() const		{ return QPtrCollection::autoDelete(); }
        void  setAutoDelete( bool del )	{ QPtrCollection::setAutoDelete(del); }
        uint  count()   const		{ return QGList::count(); }
        bool  isEmpty() const		{ return QGList::count() == 0; }
        void  enqueue( const type *d )	{ QGList::append(Item(d)); }
        type *dequeue()			{ return (type *)QGList::takeFirst();}
        bool  remove()			{ return QGList::removeFirst(); }
        void  clear()			{ QGList::clear(); }
        type *head()    const		{ return (type *)QGList::cfirst(); }
    	  operator type *() const	{ return (type *)QGList::cfirst(); }
        type *current() const		{ return (type *)QGList::cfirst(); }

    #ifdef Q_QDOC
    protected:
        virtual QDataStream& read( QDataStream&, QPtrCollection::Item& );
        virtual QDataStream& write( QDataStream&, QPtrCollection::Item ) const;
    #endif

    private:
        void  deleteItem( Item d );
    };

    #if !defined(Q_BROKEN_TEMPLATE_SPECIALIZATION)
    template<> inline void QPtrQueue<void>::deleteItem( QPtrCollection::Item )
    {
    }
    #endif

    template<class type> inline void QPtrQueue<type>::deleteItem( QPtrCollection::Item d )
    {
        if ( del_item ) delete (type *)d;
    }

    #ifndef QT_NO_COMPAT
    #define QQueue QPtrQueue
    #endif

    #endif // QPTRQUEUE_H