DtOsgEarthStreamedFeatureCallback.h

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/******************************************************************************
** Copyright (c) 2018 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once
#include <vrvOsgEarth/vrvOsgEarth.h>
#include <vrvOsg/DtOsgEarthFeatureDataBroker.h>
#include <vrvUtil/DtVirtualBaseClass.h>

namespace makVrv
{

   class DtOsgEarthStreamedFeatureManager;

   //
   // **** DtOsgEarthStreamedFeatureCallback
   //
   // DtOsgEarthFeatureDataBroker::Callback that is fired when a new feature
   // data 'tile' pages in.  In uses the visitor above to find any
   // CustomFeatureNodes.  It then passes that data to the streamed
   // feature manager, and also connects the custom node's 'being destroyed'
   // signal to the feature manager's equivalent slot.
   class DT_DLL_VRVOSGEARTH DtOsgEarthStreamedFeatureCallback
      : public DtOsgEarthFeatureDataBroker::Callback
   {
      friend class DtOsgEarthStreamedFeatureCallbackCreator;
   protected:
      // CTOR
      DtOsgEarthStreamedFeatureCallback(DtOsgEarthStreamedFeatureManager& featureMgr);

   public: // DtOsgEarthFeatureDataBroker::Callback interface

      // Invoked by the broker when the layer is first loaded.
      void onLayerLoaded(const osgEarth::MapNode* mapNode,
         const osgEarth::ModelLayer* layer);

      void onDataPreMerge(const osgEarth::Map* map, const osgEarth::ModelLayer* layer,
         osg::Node* data);

      // Invoked by the broker when new data arrives.
      void onDataLoaded(const osgEarth::Map* map, const osgEarth::ModelLayer* layer,
         const osg::Node* data);

   public:
      static const char* className();

   protected:
      static const char* myClassName;

   protected:
      virtual ~DtOsgEarthStreamedFeatureCallback();

   protected:

      DtOsgEarthStreamedFeatureManager& myFeatureManager;
   };

   class DT_DLL_VRVOSGEARTH DtOsgEarthStreamedFeatureCallbackCreator : public DtVirtualBaseClass
   {

   public:
      static DtOsgEarthStreamedFeatureCallbackCreator& instance(DtDe& de);

      static void registerInstance(DtDe& de,
         DtOsgEarthStreamedFeatureCallbackCreator* instance);

      virtual DtOsgEarthStreamedFeatureCallback* create(DtOsgEarthStreamedFeatureManager& featureMgr);
   };
}