qiconengine.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QICONENGINE_H
#define QICONENGINE_H
 
#include <QtGui/qtguiglobal.h>
#include <QtCore/qlist.h>
#include <QtGui/qicon.h>
 
QT_BEGIN_NAMESPACE
 
 
class Q_GUI_EXPORT QIconEngine
{
public:
    QIconEngine();
    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);
    // ### Qt7: add qreal scale argument and remove scaledPixmap
    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);
 
    virtual QString key() const;
    virtual QIconEngine *clone() const = 0;
    virtual bool read(QDataStream &in);
    virtual bool write(QDataStream &out) const;
 
    virtual QList<QSize> availableSizes(QIcon::Mode mode = QIcon::Normal,
                                    QIcon::State state = QIcon::Off);
 
    virtual QString iconName();
    virtual bool isNull();
    virtual QPixmap scaledPixmap(const QSize &size, QIcon::Mode mode, QIcon::State state, qreal scale);
 
    enum IconEngineHook { IsNullHook = 3, ScaledPixmapHook };
 
    struct ScaledPixmapArgument
    {
        QSize size;
        QIcon::Mode mode;
        QIcon::State state;
        qreal scale;
        QPixmap pixmap;
    };
 
    virtual void virtual_hook(int id, void *data);
 
protected:
    QIconEngine(const QIconEngine &other);
 
private:
    QIconEngine &operator=(const QIconEngine &other) = delete;
};
 
QT_END_NAMESPACE
 
#endif // QICONENGINE_H