/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, version 2.1 of the License.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

* GNU Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with this program.  If not,

* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".

*

* Description:

*

*/

#ifndef ViewportMetaData_h

#define ViewportMetaData_h

#include <QFlags>

#include <QObject>

#include <QRect>

namespace GVA {

struct ParsedViewportData{

    QString m_width;

    QString m_height;

    qreal m_minScale;

};

class ViewportMetaData {

public:

    enum {

        ValueUndefined = -1

    };

    enum ScaleLimit {

        UserDefinedMinumumScale = 0x1,

        UserDefinedMaximumScale = 0x2,

        UserDefinedInitialScale = 0x4,

    };

    Q_DECLARE_FLAGS(ScaleLimits, ScaleLimit)

    ViewportMetaData();

    ViewportMetaData(const ViewportMetaData&);

    ViewportMetaData& operator=(const ViewportMetaData&);

    ~ViewportMetaData();

    void adjustViewportData(const QRect& clientRect);

    void updateViewportData(const QSize& size, const QRect& clientRect);

    void orientationChanged(const QRect& newClientRect);

    bool isLayoutNeeded();

    void reset() {initialize();}

    void setFlag(ScaleLimit scaleLimit, bool enable)

    {

        if (enable)

            m_scaleLimits |= scaleLimit;

        else

            m_scaleLimits &= !scaleLimit;

    }

    bool getFlag(ScaleLimit scaleLimit)

    {

        return m_scaleLimits.testFlag(scaleLimit);

    }

protected:

    void initialize();

    void adjustZoomValues(const QRect& clientRect);

    bool isUserSpecifiedWidth();

    bool isUserSpecifiedHeight();

public:

    qreal m_initialScale;

    qreal m_minimumScale;

    qreal m_maximumScale;

    int m_width;

    int m_height;

    bool m_userScalable;

    ScaleLimits m_scaleLimits;

    bool m_isValid;

    ParsedViewportData m_specifiedData;

};//ViewportMetaData

Q_DECLARE_OPERATORS_FOR_FLAGS(ViewportMetaData::ScaleLimits)

} //namespace GVA

#endif //ViewportMetaData_h