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/* -*-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 OSGEARTH_ANNOTATION_LABEL_NODE_H
#define OSGEARTH_ANNOTATION_LABEL_NODE_H 1

#include <osgEarthAnnotation/OrthoNode>
#include <osgEarthSymbology/Style>
#include <osgEarth/MapNode>
#include <osg/Geode>

namespace osgEarth { namespace Annotation
{
    using namespace osgEarth;
    using namespace osgEarth::Symbology;

    /**
     * Text labeling node.
     */
    class OSGEARTHANNO_EXPORT LabelNode : public OrthoNode
    {
    public:
        META_AnnotationNode( osgEarthAnnotation, LabelNode );

        /**
         * Constructs a label node that is positioned relative to a map.
         */
        LabelNode(
            MapNode*                mapNode,
            const GeoPoint&         position,
            const std::string&      text,
            const Style&            style =Style() );

        /**
         * Constructs a label node that is positioned relative to a map.
         */
        LabelNode(
            MapNode*                mapNode,
            const GeoPoint&         position,
            const std::string&      text,
            const TextSymbol*       symbol );

        /** 
         * Construct a label node purely from the style. The text string
         * must be in the text symbol
         */
        LabelNode(
            MapNode*                mapNode,
            const GeoPoint&         position,
            const Style&            style );

        /**
         * Construct a label node with just a style
         */
        LabelNode(
            MapNode*                mapNode,
            const Style&            style );

        /**
         * Constructs a label node that is positioned some other way,
         * typically by being in a subgraph under another transform
         * somewhere.
         */
        LabelNode(
            const std::string& text   ="",
            const Style&       style =Style() );

        /**
         * Deserializes a label
         */
        LabelNode(
            MapNode*              mapNode,
            const Config&         conf,
            const osgDB::Options* dbOptions );

        virtual ~LabelNode() { }

        /**
         * Sets the text content.
         */
        void setText( const std::string& text );
        const std::string& text() const { return _text; }

        /**
         * Gets a copy of the text style.
         */
        const Style& style() const { return _style; }

        /**
         * Sets a new text style
         */
        void setStyle( const Style& style );

    public: // OrthoNode override

        virtual void setAnnotationData( AnnotationData* data );

        virtual void setDynamic( bool value );

        virtual Config getConfig() const;

    protected:
        void init(const Style& style);

        std::string              _text;
        Style                    _style;
        osg::ref_ptr<osg::Geode> _geode;

        /** Copy constructor */
        LabelNode( const LabelNode& rhs, const osg::CopyOp& op =osg::CopyOp::DEEP_COPY_ALL ) { }
    };

} } // namespace osgEarth::Annotation

#endif // OSGEARTH_ANNOTATION_LABEL_NODE_H