DtOsgNodeObserver.h

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/******************************************************************************
** Copyright (c) 2022 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvUtil/DtSignalConnectionManager.h>

#include <osg/Observer>
#include <osg/Node>

#include <unordered_map>

namespace makVrv
{
   class DT_DLL_VRVOSG DtOsgNodeObserver : public osg::Observer
   {
   public:
      DtOsgNodeObserver(osg::Node* node);
      virtual ~DtOsgNodeObserver();

      virtual void objectDeleted(void* object);

      boost::signalslib::signal<void (osg::Node*)> signal_NodeDeleting;
   private:
      osg::Node* myNode;
   };

   typedef std::unordered_map<osg::Node*, DtOsgNodeObserver*> 
      MapNodesToObservers;
   
   class DT_DLL_VRVOSG DtOsgNodeObserverSupervisor
   {
   public:
      DtOsgNodeObserverSupervisor();

      virtual ~DtOsgNodeObserverSupervisor();

      void createObserver(osg::Node* node);

      bool observerExists(osg::Node* node);

      void destroyObserver(osg::Node* data, bool bCheck);

      void removeAndDestroyAllObservers(void);

      boost::signalslib::signal<void (osg::Node*)> signal_NodeDeleting;
   private:

      void slot_NodeDeleting(osg::Node* node);

      MapNodesToObservers myMapNodesToObservers;

      DtSignalConnectionManager myConnections;
   };
   
}