qpixmapcache.h

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00001 /****************************************************************************
00002 **
00003 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
00004 ** All rights reserved.
00005 ** Contact: Nokia Corporation (qt-info@nokia.com)
00006 **
00007 ** This file is part of the QtGui module of the Qt Toolkit.
00008 **
00009 ** $QT_BEGIN_LICENSE:LGPL$
00010 ** Commercial Usage
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00012 ** accordance with the Qt Commercial License Agreement provided with the
00013 ** Software or, alternatively, in accordance with the terms contained in
00014 ** a written agreement between you and Nokia.
00015 **
00016 ** GNU Lesser General Public License Usage
00017 ** Alternatively, this file may be used under the terms of the GNU Lesser
00018 ** General Public License version 2.1 as published by the Free Software
00019 ** Foundation and appearing in the file LICENSE.LGPL included in the
00020 ** packaging of this file.  Please review the following information to
00021 ** ensure the GNU Lesser General Public License version 2.1 requirements
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00024 ** In addition, as a special exception, Nokia gives you certain additional
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00026 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this module.
00027 **
00028 ** GNU General Public License Usage
00029 ** Alternatively, this file may be used under the terms of the GNU
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00041 
00042 #ifndef QPIXMAPCACHE_H
00043 #define QPIXMAPCACHE_H
00044 
00045 #include <QtGui/qpixmap.h>
00046 
00047 #ifdef Q_TEST_QPIXMAPCACHE
00048 #include <QtCore/qpair.h>
00049 #endif
00050 
00051 QT_BEGIN_HEADER
00052 
00053 QT_BEGIN_NAMESPACE
00054 
00055 QT_MODULE(Gui)
00056 
00057 class Q_GUI_EXPORT QPixmapCache
00058 {
00059 public:
00060     class KeyData;
00061     class Q_GUI_EXPORT Key
00062     {
00063     public:
00064         Key();
00065         Key(const Key &other);
00066         ~Key();
00067         bool operator ==(const Key &key) const;
00068         inline bool operator !=(const Key &key) const
00069         { return !operator==(key); }
00070         Key &operator =(const Key &other);
00071 
00072     private:
00073         KeyData *d;
00074         friend class QPMCache;
00075         friend class QPixmapCache;
00076     };
00077 
00078     static int cacheLimit();
00079     static void setCacheLimit(int);
00080     static QPixmap *find(const QString &key);
00081     static bool find(const QString &key, QPixmap &pixmap);
00082     static bool find(const QString &key, QPixmap *pixmap);
00083     static bool find(const Key &key, QPixmap *pixmap);
00084     static bool insert(const QString &key, const QPixmap &pixmap);
00085     static Key insert(const QPixmap &pixmap);
00086     static bool replace(const Key &key, const QPixmap &pixmap);
00087     static void remove(const QString &key);
00088     static void remove(const Key &key);
00089     static void clear();
00090 
00091 #ifdef Q_TEST_QPIXMAPCACHE
00092     static void flushDetachedPixmaps();
00093     static int totalUsed();
00094     static QList< QPair<QString,QPixmap> > allPixmaps();
00095 #endif
00096 };
00097 
00098 QT_END_NAMESPACE
00099 
00100 QT_END_HEADER
00101 
00102 #endif // QPIXMAPCACHE_H