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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>qguardedptr.h</h1>
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| 33 |
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| 34 | <p>This is the verbatim text of the qguardedptr.h include file. It is provided only for illustration; the copyright remains with Trolltech.
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| 35 | <hr>
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| 36 | <pre>
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| 37 | /****************************************************************************
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| 38 | ** $Id: qguardedptr-h.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 39 | **
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| 40 | ** Definition of QGuardedPtr class
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| 41 | **
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| 42 | ** Created : 990929
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| 43 | **
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| 44 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 45 | **
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| 46 | ** This file is part of the kernel module of the Qt GUI Toolkit.
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| 47 | **
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| 48 | ** This file may be distributed under the terms of the Q Public License
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| 49 | ** as defined by Trolltech ASA of Norway and appearing in the file
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| 50 | ** LICENSE.QPL included in the packaging of this file.
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| 51 | **
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| 52 | ** This file may be distributed and/or modified under the terms of the
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| 53 | ** GNU General Public License version 2 as published by the Free Software
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| 54 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 55 | ** packaging of this file.
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| 56 | **
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| 57 | ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
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| 58 | ** licenses may use this file in accordance with the Qt Commercial License
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| 59 | ** Agreement provided with the Software.
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| 60 | **
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| 61 | ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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| 62 | ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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| 63 | **
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| 64 | ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
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| 65 | ** information about Qt Commercial License Agreements.
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| 66 | ** See http://www.trolltech.com/qpl/ for QPL licensing information.
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| 67 | ** See http://www.trolltech.com/gpl/ for GPL licensing information.
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| 68 | **
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| 69 | ** Contact info@trolltech.com if any conditions of this licensing are
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| 70 | ** not clear to you.
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| 71 | **
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| 72 | **********************************************************************/
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| 73 |
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| 74 | #ifndef QGUARDEDPTR_H
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| 75 | #define QGUARDEDPTR_H
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| 76 |
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| 77 | #ifndef QT_H
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| 78 | #include "qobject.h"
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| 79 | #endif // QT_H
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| 80 |
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| 81 | // ### 4.0: rename to something without Private in it. Not really internal.
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| 82 | class Q_EXPORT QGuardedPtrPrivate : public QObject, public QShared
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| 83 | {
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| 84 | Q_OBJECT
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| 85 | public:
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| 86 | QGuardedPtrPrivate( QObject* );
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| 87 | ~QGuardedPtrPrivate();
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| 88 |
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| 89 | QObject* object() const;
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| 90 | void reconnect( QObject* );
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| 91 |
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| 92 | private slots:
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| 93 | void objectDestroyed();
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| 94 |
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| 95 | private:
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| 96 | QObject* obj;
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| 97 | #if defined(Q_DISABLE_COPY) // Disabled copy constructor and operator=
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| 98 | QGuardedPtrPrivate( const QGuardedPtrPrivate & );
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| 99 | QGuardedPtrPrivate &operator=( const QGuardedPtrPrivate & );
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| 100 | #endif
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| 101 | };
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| 102 |
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| 103 | template <class T>
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| 104 | class QGuardedPtr
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| 105 | {
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| 106 | public:
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| 107 | QGuardedPtr() : priv( new QGuardedPtrPrivate( 0 ) ) {}
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| 108 |
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| 109 | QGuardedPtr( T* o) {
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| 110 | priv = new QGuardedPtrPrivate( (QObject*)o );
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| 111 | }
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| 112 |
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| 113 | QGuardedPtr(const QGuardedPtr<T> &p) {
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| 114 | priv = p.priv;
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| 115 | ref();
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| 116 | }
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| 117 |
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| 118 | ~QGuardedPtr() { deref(); }
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| 119 |
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| 120 | QGuardedPtr<T> &operator=(const QGuardedPtr<T> &p) {
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| 121 | if ( priv != p.priv ) {
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| 122 | deref();
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| 123 | priv = p.priv;
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| 124 | ref();
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| 125 | }
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| 126 | return *this;
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| 127 | }
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| 128 |
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| 129 | QGuardedPtr<T> &operator=(T* o) {
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| 130 | if ( priv && priv->count == 1 ) {
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| 131 | priv->reconnect( (QObject*)o );
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| 132 | } else {
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| 133 | deref();
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| 134 | priv = new QGuardedPtrPrivate( (QObject*)o );
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| 135 | }
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| 136 | return *this;
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| 137 | }
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| 138 |
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| 139 | bool operator==( const QGuardedPtr<T> &p ) const {
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| 140 | return (T*)(*this) == (T*) p;
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| 141 | }
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| 142 |
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| 143 | bool operator!= ( const QGuardedPtr<T>& p ) const {
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| 144 | return !( *this == p );
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| 145 | }
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| 146 |
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| 147 | bool isNull() const { return !priv || !priv->object(); }
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| 148 |
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| 149 | T* operator->() const { return (T*)(priv?priv->object():0); }
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| 150 |
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| 151 | T& operator*() const { return *((T*)(priv?priv->object():0)); }
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| 152 |
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| 153 | operator T*() const { return (T*)(priv?priv->object():0); }
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| 154 |
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| 155 | private:
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| 156 |
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| 157 | void ref() { if (priv) priv->ref(); }
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| 158 |
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| 159 | void deref() {
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| 160 | if ( priv && priv->deref() )
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| 161 | delete priv;
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| 162 | }
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| 163 |
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| 164 | QGuardedPtrPrivate* priv;
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| 165 | };
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| 166 |
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| 167 |
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| 168 |
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| 169 |
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| 170 | inline QObject* QGuardedPtrPrivate::object() const
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| 171 | {
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| 172 | return obj;
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| 173 | }
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| 174 |
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| 175 | #define Q_DEFINED_QGUARDEDPTR
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| 176 | #include "qwinexport.h"
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| 177 | #endif
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| 178 | </pre>
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| 179 | <!-- eof -->
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| 180 | <p><address><hr><div align=center>
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| 181 | <table width=100% cellspacing=0 border=0><tr>
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| 182 | <td>Copyright © 2007
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| 183 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 184 | <td align=right><div align=right>Qt 3.3.8</div>
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| 185 | </table></div></address></body>
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