MercatorProjection.h

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//
// This file is part of the Marble Virtual Globe.
//
// This program is free software licensed under the GNU LGPL. You can
// find a copy of this license in LICENSE.txt in the top directory of
// the source code.
//
// Copyright 2007      Inge Wallin  <ingwa@kde.org>
// Copyright 2007-2012 Torsten Rahn  <rahn@kde.org>
//


#ifndef MARBLE_MERCATORPROJECTION_H
#define MARBLE_MERCATORPROJECTION_H


#include "CylindricalProjection.h"

namespace Marble
{

class MercatorProjection : public CylindricalProjection
{
    // Not a QObject so far because we don't need to send signals.
 public:

    MercatorProjection();

    virtual ~MercatorProjection();

    virtual qreal  maxValidLat() const;
    virtual qreal  minValidLat() const;

    virtual PreservationType preservationType() const { return Conformal; }

    bool screenCoordinates( const GeoDataCoordinates &coordinates, 
                            const ViewportParams *params,
                            qreal &x, qreal &y, bool &globeHidesPoint ) const;

    bool screenCoordinates( const GeoDataCoordinates &coordinates,
                            const ViewportParams * viewport,
                            qreal *x, qreal &y, int &pointRepeatNum,
                            const QSizeF& size,
                            bool &globeHidesPoint ) const;

    using CylindricalProjection::screenCoordinates;

    bool geoCoordinates( const int x, const int y,
                         const ViewportParams *params,
                         qreal& lon, qreal& lat,
                         GeoDataCoordinates::Unit = GeoDataCoordinates::Degree ) const;

    GeoDataLatLonAltBox latLonAltBox( const QRect &screenRect,
                                      const ViewportParams *viewport ) const;

    bool  mapCoversViewport( const ViewportParams *viewport ) const;

 private:
    Q_DISABLE_COPY( MercatorProjection )
};

}

#endif