source: trunk/src/gui/effects/qgraphicseffect_p.h@ 712

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#ifndef QGRAPHICSEFFECT_P_H
#define QGRAPHICSEFFECT_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp.  This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//

#include "qgraphicseffect.h"

#include <QPixmapCache>

#include <private/qobject_p.h>
#include <private/qpixmapfilter_p.h>

#ifndef QT_NO_GRAPHICSEFFECT
QT_BEGIN_NAMESPACE

class QGraphicsEffectSourcePrivate;
class Q_GUI_EXPORT QGraphicsEffectSource : public QObject
{
    Q_OBJECT
public:
    ~QGraphicsEffectSource();
    const QGraphicsItem *graphicsItem() const;
    const QWidget *widget() const;
    const QStyleOption *styleOption() const;

    bool isPixmap() const;
    void draw(QPainter *painter);
    void update();

    QRectF boundingRect(Qt::CoordinateSystem coordinateSystem = Qt::LogicalCoordinates) const;
    QRect deviceRect() const;
    QPixmap pixmap(Qt::CoordinateSystem system = Qt::LogicalCoordinates,
                   QPoint *offset = 0,
                   QGraphicsEffect::PixmapPadMode mode = QGraphicsEffect::PadToEffectiveBoundingRect) const;

protected:
    QGraphicsEffectSource(QGraphicsEffectSourcePrivate &dd, QObject *parent = 0);

private:
    Q_DECLARE_PRIVATE(QGraphicsEffectSource)
    Q_DISABLE_COPY(QGraphicsEffectSource)
    friend class QGraphicsEffect;
    friend class QGraphicsEffectPrivate;
    friend class QGraphicsScenePrivate;
    friend class QGraphicsItem;
    friend class QGraphicsItemPrivate;
    friend class QWidget;
    friend class QWidgetPrivate;
};

class QGraphicsEffectSourcePrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QGraphicsEffectSource)
public:
    QGraphicsEffectSourcePrivate()
        : QObjectPrivate()
        , m_cachedSystem(Qt::DeviceCoordinates)
        , m_cachedMode(QGraphicsEffect::PadToTransparentBorder)
    {}

    enum InvalidateReason
    {
        TransformChanged,
        EffectRectChanged,
        SourceChanged
    };

    virtual ~QGraphicsEffectSourcePrivate();
    virtual void detach() = 0;
    virtual QRectF boundingRect(Qt::CoordinateSystem system) const = 0;
    virtual QRect deviceRect() const = 0;
    virtual const QGraphicsItem *graphicsItem() const = 0;
    virtual const QWidget *widget() const = 0;