/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QPAINTENGINE_P_H+
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#define QPAINTENGINE_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists for the convenience+
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// of other Qt classes.  This header file may change from version to+
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// version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include "QtGui/qpainter.h"+
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#include "QtGui/qpaintengine.h"+
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#include "QtGui/qregion.h"+
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#include "private/qobject_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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class QPaintDevice;+
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+
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class QPaintEnginePrivate+
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{+
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    Q_DECLARE_PUBLIC(QPaintEngine)+
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public:+
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    QPaintEnginePrivate() : pdev(0), q_ptr(0), currentClipWidget(0), hasSystemTransform(0),+
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                            hasSystemViewport(0) {}+
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    virtual ~QPaintEnginePrivate() { }+
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    QPaintDevice *pdev;+
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    QPaintEngine *q_ptr;+
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    QRegion systemClip;+
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    QRect systemRect;+
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    QRegion systemViewport;+
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    QTransform systemTransform;+
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    QWidget *currentClipWidget;+
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    uint hasSystemTransform : 1;+
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    uint hasSystemViewport : 1;+
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+
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    inline void transformSystemClip()+
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    {+
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        if (systemClip.isEmpty())+
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            return;+
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+
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        if (hasSystemTransform) {+
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            if (systemTransform.type() <= QTransform::TxTranslate)+
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                systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy()));+
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            else+
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                systemClip = systemTransform.map(systemClip);+
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        }+
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+
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        // Make sure we're inside the viewport.+
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        if (hasSystemViewport) {+
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            systemClip &= systemViewport;+
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            if (systemClip.isEmpty()) {+
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                // We don't want to paint without system clip, so set it to 1 pixel :)+
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                systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1));+
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            }+
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        }+
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    }+
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+
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    inline void setSystemTransform(const QTransform &xform)+
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    {+
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        systemTransform = xform;+
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        if ((hasSystemTransform = !xform.isIdentity()) || hasSystemViewport)+
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            transformSystemClip();+
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        systemStateChanged();+
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    }+
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+
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    inline void setSystemViewport(const QRegion &region)+
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    {+
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        systemViewport = region;+
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        hasSystemViewport = !systemViewport.isEmpty();+
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    }+
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+
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    virtual void systemStateChanged() { }+
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+
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    void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti);+
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};+
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+
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QT_END_NAMESPACE+
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+
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#endif // QPAINTENGINE_P_H+
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