DtOsgEarthCacheTileHandler.h

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/******************************************************************************
** Copyright (c) 2019 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#include <vrvOsgEarth/vrvOsgEarth.h>
#include <osgEarth/TileHandler>
#include <vrvUtil/DtVirtualBaseClass.h>


// Class Forward Declarations
namespace osgEarth
{
   class TileKey;
   namespace Util {
      class TileVisitor;
   }
}

namespace osgDB
{
   class DatabasePager;
}

namespace makVrv
{
   class DtOsgEarthCache;
   class DtObserverObject;

   class DT_DLL_VRVOSGEARTH DtOsgEarthCacheTileHandler : public osgEarth::TileHandler
   {
   public:

      friend class DtOsgEarthCacheTileHandlerCreator;

      virtual void setMinRangeFactor(float min_range_factor);

      virtual void setObserverObject(DtObserverObject* observer);

      virtual bool handleTile(const osgEarth::TileKey& key, const osgEarth::TileVisitor& tv);

      virtual bool hasData(const osgEarth::TileKey& key) const;

      virtual void setDatabasePager(osgDB::DatabasePager* databasePager);

      virtual void reset();

   protected:
      DtOsgEarthCacheTileHandler(DtOsgEarthCache*);
      virtual void moveCameraToTile(const osgEarth::TileKey& key);

   private:
      DtOsgEarthCacheTileHandler();
      DtOsgEarthCacheTileHandler(const DtOsgEarthCacheTileHandler&);
      DtOsgEarthCacheTileHandler &operator=(const DtOsgEarthCacheTileHandler&);

   protected:
      DtObserverObject* myObserverObject;
      osg::ref_ptr<osgDB::DatabasePager> myDatabasePager;
      DtOsgEarthCache* myOsgEarthCache;
      float myMinRangeFactor;
      bool myFirstTile;
      int myTotalTiles;
      float myWaitTime;
   };

   class DT_DLL_VRVOSGEARTH DtOsgEarthCacheTileHandlerCreator
      : public DtVirtualBaseClass
   {
   public:
      static DtOsgEarthCacheTileHandlerCreator& instance(DtDe& de);
      static void registerInstance(DtDe& de, DtOsgEarthCacheTileHandlerCreator* creator);
      virtual DtOsgEarthCacheTileHandler* create(DtOsgEarthCache*) const;
   };
}