DtChannel.h

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/****************************************************************************** 
** Copyright (c) 2010 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 
/****************************************************************************** 
** $RCSfile: DtChannel.h,v $ $Revision: 1.43 $ $State: Exp $ 
******************************************************************************/ 
 
 
#pragma once 
#include <vrvCore/vrvCore.h> 
#include <vrvUtil/DtSignalConnectionManager.h>
#include <vrvUtil/DtVirtualBaseClass.h>
#include <vrvUtil/DtChannelConfiguration.h>
#include <boost/signals.hpp>

namespace makVrv 
{ 
   class DtDe;
   class DtWindow;
   class DtCameraObject;
   class DtObserverObject;
   class DtMouseEvent;
   class DtKeyEvent;

   class DT_DLL_VRVCORE DtChannel
   { 

   protected:
      DtChannel(DtDe& de, DtWindow* window,DtChannelConfiguration&);

   public:

      virtual ~DtChannel();

      DtObserverObject* findObserver() const;

      unsigned int currentModelSet() const;

      virtual void setClearColor(float r,float g,float b, float a) = 0;

      virtual void setViewport(int x,int y,int width, int height) = 0;

      virtual void getViewport(int& x,int& y, int& width,int& height) const = 0;

      virtual void setWindow(DtWindow*) = 0;

      virtual void setCameraPosition(double x, double y, double z) = 0;

      virtual const DtWindow* window() const = 0;

      virtual void update() = 0;

      const DtChannelConfiguration& configuration() const;

      virtual void setCameraObject(DtCameraObject* cameraObject) = 0;

      virtual void setParentCameraObject(DtCameraObject* cameraObject) = 0;

      virtual void updateProjection() = 0;

      virtual void setDynamicNearFar(bool enable) = 0;

      virtual void setNearFarRatio(double ratio) = 0;

      void setObserverName( const std::string& observerName );

      virtual void setProjectionResizePolicy(
         DtChannelConfiguration::ProjectionResizePolicy policy);

      virtual DtChannelConfiguration::ProjectionResizePolicy 
         projectionResizePolicy() const;

      virtual bool processMouseEvent( const DtMouseEvent& ev) = 0;

      virtual bool processKeyboardEvent( const DtKeyEvent& ev) = 0;
      
      virtual void projectToScreen( double dbX, double dbY, double dbZ,
         double& screenX, double& screenY, double& screenZ ) = 0;
         
      virtual void projectToWorld( double screenX, double screenY,
         double& dbX, double& dbY, double& dbZ ) = 0;
         
      virtual void warpMouse( float pixelX, float pixelY ) = 0;
      
   protected:
      virtual void setProjectionMatrixAsPerspective(double fovy,
         double   aspectRatio, double zNear, double zFar) = 0;

      virtual void setProjectionMatrixAsFrustum (double left, double right, 
         double bottom, double top, 
         double zNear, double zFar) = 0;
         
      virtual void connectToObserver() = 0;
      
      void observerAdded( const std::string& observerName );
      void observerRemoved( const std::string& observerName );

   protected:
      
      DtDe& myDe;
      DtChannelConfiguration& myChannelConfiguration;
      DtSignalConnectionManager myConnections;

      int myModelSet;
      DtObserverObject* myObserver;
      std::string myObserverName;
      DtChannelConfiguration::ProjectionResizePolicy myProjectionResizePolicy;
   };

   class DT_DLL_VRVCORE DtChannelCreator : public DtVirtualBaseClass
   {

   public:
      static DtChannelCreator& instance(DtDe& theIG);

      static void registerInstance(DtDe& de, DtChannelCreator* instance);     
      
      virtual DtChannel* create(DtDe& de, DtWindow* window, 
         DtChannelConfiguration&) = 0;
   };
}