SphericalProjection.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_SPHERICALPROJECTION_H
#define MARBLE_SPHERICALPROJECTION_H


#include "AbstractProjection.h"

namespace Marble
{

class SphericalProjectionPrivate;

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

    SphericalProjection();

    virtual ~SphericalProjection();

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

    virtual bool traversablePoles()  const { return true; }
    virtual bool traversableDateLine()  const { return true; }

    virtual SurfaceType surfaceType() const { return Azimuthal; }

    virtual PreservationType preservationType() const { return NoPreservation; }

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

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

    virtual bool screenCoordinates( const GeoDataLineString &lineString,
                            const ViewportParams *viewport,
                            QVector<QPolygonF*> &polygons ) const;

    using AbstractProjection::screenCoordinates;

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

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

    bool  mapCoversViewport( const ViewportParams *viewport ) const;

    virtual QPainterPath mapShape( const ViewportParams *viewport ) const;

 protected:
    SphericalProjection(SphericalProjectionPrivate *dd );

 private:
    Q_DECLARE_PRIVATE(SphericalProjection)
    Q_DISABLE_COPY( SphericalProjection )
};

}

#endif