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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QPAINTENGINE_P_H
#define QPAINTENGINE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "QtGui/qpainter.h"
#include "QtGui/qpaintengine.h"
#include "QtGui/qregion.h"
#include "private/qobject_p.h"
QT_BEGIN_NAMESPACE
class QPaintDevice;
class QPaintEnginePrivate
{
Q_DECLARE_PUBLIC(QPaintEngine)
public:
QPaintEnginePrivate() : pdev(0), q_ptr(0), currentClipWidget(0), hasSystemTransform(0),
hasSystemViewport(0) {}
virtual ~QPaintEnginePrivate() { }
QPaintDevice *pdev;
QPaintEngine *q_ptr;
QRegion systemClip;
QRect systemRect;
QRegion systemViewport;
QTransform systemTransform;
QWidget *currentClipWidget;
uint hasSystemTransform : 1;
uint hasSystemViewport : 1;
inline void transformSystemClip()
{
if (systemClip.isEmpty())
return;
if (hasSystemTransform) {
if (systemTransform.type() <= QTransform::TxTranslate)
systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy()));
else
systemClip = systemTransform.map(systemClip);
}
// Make sure we're inside the viewport.
if (hasSystemViewport) {
systemClip &= systemViewport;
if (systemClip.isEmpty()) {
// We don't want to paint without system clip, so set it to 1 pixel :)
systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1));
}
}
}
inline void setSystemTransform(const QTransform &xform)
{
systemTransform = xform;
if ((hasSystemTransform = !xform.isIdentity()) || hasSystemViewport)
transformSystemClip();
systemStateChanged();
}
inline void setSystemViewport(const QRegion ®ion)
{
systemViewport = region;
hasSystemViewport = !systemViewport.isEmpty();
}
virtual void systemStateChanged() { }
void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti);
};
QT_END_NAMESPACE
#endif // QPAINTENGINE_P_H
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