DtOsgEarthStreamedFeatureManager.h

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/****************************************************************************** 
** Copyright (c) 2021 VT-MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 


#pragma once

#include <vrvOsgEarth/vrvOsgEarth.h>

#include <vrvCore/DtStreamedFeatureManager.h>

#include <vrvUtil/DtKeyedSignalConnectionManager.h>

#include <osg/NodeVisitor>

#include <boost/thread.hpp>

namespace osgEarth
{
   class Map;
   class Layer;
   class CustomFeatureNode;
}

namespace osg
{
   class Node;
}

namespace makVrv
{
   class DtTerrainPatchObject;

   class DT_DLL_VRVOSGEARTH DtOsgEarthStreamedFeatureManager 
      : public DtStreamedFeatureManager
   {
   public:

      virtual ~DtOsgEarthStreamedFeatureManager();

   protected: 

      friend class DtOsgEarthStreamedFeatureCallback;


      virtual void processNewFeatures( 
         const osgEarth::CustomFeatureNode* featureNode);

      virtual void slot_customFeatureNodeToBeDeleted( 
         const osgEarth::CustomFeatureNode* node);


      virtual void onDataLoaded(const osgEarth::Layer* layer,
         const osg::Node* data);

      virtual void checkAndProcessStrandedFeatures();

   protected:
      friend class DtOsgEarthStreamedFeatureManagerCreator;

      // CTOR (protected, only created through creator function)
      DtOsgEarthStreamedFeatureManager( DtDe& de );

      // CTOR (unimplemented default CTOR)
      DtOsgEarthStreamedFeatureManager();

      virtual void slot_terrainPatchCreated(DtTerrainPatchObject& patch);

   protected:
      // In the case where custom features are still paging in when a new terrain is loaded,
      // the terrain paging thread deletes any custom feature nodes (instead of paging them out
      // normally).  In this case, the features from those nodes are placed on a list that can
      // be used to delete those features from the Render thread (instead of from the paging thread
      // that deleted the osg custom feature node).  This method is mutex-protected.
      virtual void moveFeaturesToStrandedList(const osgEarth::CustomFeatureNode* featureNode);

   protected:
      DtKeyedSignalConnectionManager<const osgEarth::CustomFeatureNode*>
         myKeyedConnections;

      struct RegisteredFeatureContainer
      {
         std::string registrantName; 
         unsigned long long  featureId;
      };

      boost::mutex myStrandedFeatureMutex;
      typedef std::list< RegisteredFeatureContainer> StrandedFeaturesList;
      StrandedFeaturesList myStrandedFeatures;

      DtSignalConnectionManager myConnections;
   };

   class DT_DLL_VRVOSGEARTH DtOsgEarthStreamedFeatureManagerCreator 
      : public DtStreamedFeatureManagerCreator
   {
   public:
      DtOsgEarthStreamedFeatureManagerCreator();

      virtual ~DtOsgEarthStreamedFeatureManagerCreator();

      virtual DtStreamedFeatureManager* create( DtDe& de );
   };
}