/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#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, IconNameHook };

    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 5: make this function const and virtual.
    QString iconName();
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QICONENGINE_H
