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/****************************************************************************
**
** Definition of some shared interal classes
**
** Created : 010427
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file. Licensees holding valid Qt
** Commercial 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 WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#ifndef QINTERNAL_P_H
#define QINTERNAL_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of a number of Qt sources files. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
//
#ifndef QT_H
#include "qnamespace.h"
#include "qrect.h"
#include "qptrlist.h"
#include "qcstring.h"
#include "qiodevice.h"
#endif // QT_H
class QWidget;
class QPainter;
class QPixmap;
class Q_EXPORT QSharedDoubleBuffer
{
public:
enum DoubleBufferFlags {
NoFlags = 0x00,
InitBG = 0x01,
Force = 0x02,
Default = InitBG | Force
};
typedef uint DBFlags;
QSharedDoubleBuffer( DBFlags f = Default );
QSharedDoubleBuffer( QWidget* widget,
int x = 0, int y = 0, int w = -1, int h = -1,
DBFlags f = Default );
QSharedDoubleBuffer( QPainter* painter,
int x = 0, int y = 0, int w = -1, int h = -1,
DBFlags f = Default );
QSharedDoubleBuffer( QWidget *widget, const QRect &r, DBFlags f = Default );
QSharedDoubleBuffer( QPainter *painter, const QRect &r, DBFlags f = Default );
~QSharedDoubleBuffer();
bool begin( QWidget* widget, int x = 0, int y = 0, int w = -1, int h = -1 );
bool begin( QPainter* painter, int x = 0, int y = 0, int w = -1, int h = -1);
bool begin( QWidget* widget, const QRect &r );
bool begin( QPainter* painter, const QRect &r );
bool end();
QPainter* painter() const;
bool isActive() const;
bool isBuffered() const;
void flush();
static bool isDisabled() { return !dblbufr; }
static void setDisabled( bool off ) { dblbufr = !off; }
static void cleanup();
private:
enum DoubleBufferState {
Active = 0x0100,
BufferActive = 0x0200,
ExternalPainter = 0x0400
};
typedef uint DBState;
QPixmap *getPixmap();
void releasePixmap();
QWidget *wid;
int rx, ry, rw, rh;
DBFlags flags;
DBState state;
QPainter *p, *external_p;
QPixmap *pix;
static bool dblbufr;
};
inline bool QSharedDoubleBuffer::begin( QWidget* widget, const QRect &r )
{ return begin( widget, r.x(), r.y(), r.width(), r.height() ); }
inline bool QSharedDoubleBuffer::begin( QPainter *painter, const QRect &r )
{ return begin( painter, r.x(), r.y(), r.width(), r.height() ); }
inline QPainter* QSharedDoubleBuffer::painter() const
{ return p; }
inline bool QSharedDoubleBuffer::isActive() const
{ return ( state & Active ); }
inline bool QSharedDoubleBuffer::isBuffered() const
{ return ( state & BufferActive ); }
class QVirtualDestructor {
public:
virtual ~QVirtualDestructor() {}
};
template <class T>
class QAutoDeleter : public QVirtualDestructor {
public:
QAutoDeleter( T* p ) : ptr( p ) {}
~QAutoDeleter() { delete ptr; }
T* data() const { return ptr; }
private:
T* ptr;
};
template <class T>
T* qAutoDeleterData( QAutoDeleter<T>* ad )
{
if ( !ad )
return 0;
return ad->data();
}
template <class T>
QAutoDeleter<T>* qAutoDeleter( T* p )
{
return new QAutoDeleter<T>( p );
}
class Q_EXPORT QMembuf
{
public:
QMembuf();
~QMembuf();
void append( QByteArray *ba );
void clear();
bool consumeBytes( Q_ULONG nbytes, char *sink );
QByteArray readAll();
bool scanNewline( QByteArray *store );
bool canReadLine() const;
int ungetch( int ch );
QIODevice::Offset size() const;
private:
QPtrList<QByteArray> *buf;
QIODevice::Offset _size;
QIODevice::Offset _index;
};
inline void QMembuf::append( QByteArray *ba )
{ buf->append( ba ); _size += ba->size(); }
inline void QMembuf::clear()
{ buf->clear(); _size=0; _index=0; }
inline QByteArray QMembuf::readAll()
{ QByteArray ba(_size); consumeBytes(_size,ba.data()); return ba; }
inline bool QMembuf::canReadLine() const
{ return ((QMembuf*)this)->scanNewline( 0 ); }
inline QIODevice::Offset QMembuf::size() const
{ return _size; }
#endif // QINTERNAL_P_H
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