/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2013 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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/>
 */

#ifndef OSGEARTHSYMBOLOGY_MARKER_RESOURCE_H
#define OSGEARTHSYMBOLOGY_MARKER_RESOURCE_H 1

#include <osgEarthSymbology/Common>
#include <osgEarthSymbology/Resource>
#include <osgEarthSymbology/Symbol>
#include <osgEarthSymbology/MarkerSymbol>
#include <osgEarth/URI>
#include <map>

namespace osgEarth { namespace Symbology
{
    using namespace osgEarth;

    /**
     * A resource that points to a "marker", which is a model representing an object
     * in the scene. Markers are used typically fro point-model subsitution and to
     * manage externally referenced (or dynamically created) scene graph nodes.
     */
    class OSGEARTHSYMBOLOGY_EXPORT MarkerResource : public Resource
    {
    public:
        /** Constructs a new marker resource. */
        MarkerResource( const Config& conf =Config() );

        /** dtor */
        virtual ~MarkerResource() { }

        /**
         * Creates a new Node representing the marker.
         */
        osg::Node* createNode( const osgDB::Options* dbOptions ) const;

    public:
        /** Source location of the actual data to load.  */
        optional<URI>& uri() { return _markerURI; }
        const optional<URI>& uri() const { return _markerURI; }

    public: // serialization methods

        virtual Config getConfig() const;
        void mergeConfig( const Config& conf );

    protected:
        optional<URI>  _markerURI;

        osg::Node* createNodeFromURI( const URI& uri, const osgDB::Options* dbOptions ) const;
    };

    typedef std::vector< osg::ref_ptr<MarkerResource> > MarkerResourceVector;

} } // namespace osgEarth::Symbology

#endif // OSGEARTHSYMBOLOGY_MARKER_RESOURCE_H
