/usr/include/marble/GeoDataRegion.h is in libmarble-dev 4:4.14.2-1.
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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 2009 Torsten Rahn <tackat@kde.org>
//
#ifndef MARBLE_GEODATAREGION_H
#define MARBLE_GEODATAREGION_H
#include "GeoDataObject.h"
#include "GeoDataLatLonAltBox.h"
#include "GeoDataLod.h"
namespace Marble
{
class GeoDataFeature;
class GeoDataRegionPrivate;
/*!
\class GeoDataRegion
\brief GeoDataRegion describes the visibility and extent of a feature.
GeoDataRegion is a tool class that implements the Region tag/class
of the Open Geospatial Consortium standard KML 2.2.
GeoDataRegion provides all aspects that can be taken into account to find
out whether a GeoDataFeature (or a GeoDataLink) is visible on the map:
\li On one hand GeoDataRegion owns a GeoDataLatLon(Alt)Box object.
GeoDataLatLon(Alt)Box is a bounding box in geodesic coordinates.
As such GeoDataLatLon(Alt)Box allows to determine whether the feature is
located inside the area that the observer/camera is looking at
("viewLatLonAltBox").
\li Additionally GeoDataRegion has got a GeoDataLod ("Level of Detail")
object. GeoDataLod describes the least and maximum size on the
screen that is required to consider a feature to be active.
A feature is visible if it's active and if its latLonAltBox covers the area
that is being looked at by the observer.
*/
class GEODATA_EXPORT GeoDataRegion : public GeoDataObject
{
public:
/*!
\brief Creates a new GeoDataRegion object that is not assigned to a \a feature.
Naturally it's recommended to assign a feature or a link to the region (and
therefore it's recommended to use one of the other constructors instead).
This constructor allows to create a stand alone region which can get
assigned to the feature or link later on.
*/
GeoDataRegion();
/*!
\brief Creates a new GeoDataRegion as a copy of \p other.
*/
GeoDataRegion( const GeoDataRegion& other );
/*!
\brief Creates a new GeoDataRegion object that is associated to a \a feature.
In the model the feature represents the parent object of the region.
*/
explicit GeoDataRegion( GeoDataFeature * feature );
/*!
\brief Destroys a Region object.
*/
virtual ~GeoDataRegion();
/*!
\brief Provides type information for downcasting a GeoNode
*/
virtual const char* nodeType() const;
bool operator==( const GeoDataRegion &other ) const;
bool operator!=( const GeoDataRegion &other ) const;
/*!
\brief Returns a geodesic bounding box ("latLonAltBox") of the region.
Returns a geodesic bounding box that describes the extent of a feature or
a link.
If no latLonAltBox has been set then a GeoDataLatLonAltBox object
will be calculated automatically: If the associated parent object is
a feature then the geometry that might be associated to the feature
will be used to calculate the GeoDataLatLonAltBox. Otherwise the
coordinate will be used to create a GeoDataLatLonAltBox (in case that
there is no geometry assigned to the feature or if the parent object of the
region is a GeoDataLink).
*/
const GeoDataLatLonAltBox& latLonAltBox() const;
/*!
\brief Sets the \a latLonAltBox of the region.
Sets the geodesic bounding box that describes the extent of a feature or
a link.
*/
void setLatLonAltBox( const GeoDataLatLonAltBox& latLonAltBox );
/*!
\brief Returns the region's level of detail.
The level of detail is returned as a \a lod object.
If no \a lod has been set then a GeoDataLod object with default values
is being returned.
*/
GeoDataLod& lod() const;
/*!
\brief Sets a region's level of detail.
The level of detail is set as a \a lod object.
*/
void setLod( const GeoDataLod& lod );
// Serialization
/*!
\brief Serialize the Region to a stream.
\param stream the stream.
*/
virtual void pack( QDataStream& stream ) const;
/*!
\brief Unserialize the Region from a stream.
\param stream the stream.
*/
virtual void unpack( QDataStream& stream );
GeoDataRegion &operator=( const GeoDataRegion& other );
private:
void swap( GeoDataRegion & other );
GeoDataRegionPrivate *d;
};
}
#endif
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