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#ifndef QICONENGINE_H
#define QICONENGINE_H

#include <QtCore/qglobal.h>
#include <QtCore/qlist.h>
#include <QtGui/qicon.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class Q_GUI_EXPORT QIconEngine
{
public:
    virtual ~QIconEngine();
    virtual void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) = 0;
    virtual QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state);
    virtual QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state);

    virtual void addPixmap(const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state);
    virtual void addFile(const QString &fileName, const QSize &size, QIcon::Mode mode, QIcon::State state);

#if 0
    virtual int frameCount(QIcon::Mode fromMode, QIcon::State fromState, QIcon::Mode toMode, QIcon::State toState);
    virtual void paintFrame(QPainter *painter, const QRect &rect, int frameNumber, QIcon::Mode fromMode, QIcon::State fromState, QIcon::Mode toMode, QIcon::State toState);
#endif
};

// ### Qt 5: move the below into QIconEngine
class Q_GUI_EXPORT QIconEngineV2 : public QIconEngine
{
public:
    virtual QString key() const;
    virtual QIconEngineV2 *clone() const;
    virtual bool read(QDataStream &in);
    virtual bool write(QDataStream &out) const;
    virtual void virtual_hook(int id, void *data);

public:
    enum IconEngineHook { AvailableSizesHook = 1 };

    struct AvailableSizesArgument
    {
        QIcon::Mode mode;
        QIcon::State state;
        QList<QSize> sizes;
    };

    // ### Qt 5: make this function const and virtual.
    QList<QSize> availableSizes(QIcon::Mode mode = QIcon::Normal,
                                QIcon::State state = QIcon::Off);
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QICONENGINE_H