cxViewportListener.h

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
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   this list of conditions and the following disclaimer.

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   may be used to endorse or promote products derived from this software 
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#ifndef CXVIEWPORTLISTENER_H_
#define CXVIEWPORTLISTENER_H_

#include "cxResourceExport.h"

#include <boost/function.hpp>
#include "vtkForwardDeclarations.h"
#include "cxVector3D.h"

namespace cx
{


class cxResource_EXPORT ViewportListenerBase
{
public:
                ViewportListenerBase();
                virtual ~ViewportListenerBase();

                void startListen(vtkRendererPtr renderer);
                void stopListen();
                bool isListening() const;

                void setCallback(boost::function<void ()> func);

                virtual void callback();
                double getVpnZoom();
                double getVpnZoom(Vector3D focalPoint);
protected:
                virtual void addObservers() = 0;
                virtual void removeObservers() = 0;

                typedef vtkSmartPointer<class ViewportObserverPrivate> ViewportObserverPrivatePtr;
                ViewportObserverPrivatePtr mObserver;
                vtkRendererPtr mRenderer;
private:
                boost::function<void ()> mCallback;
};

class cxResource_EXPORT ViewportListener : public ViewportListenerBase
{
public:
                ViewportListener() {}
                virtual ~ViewportListener();
                void setModified();

protected:
                virtual void addObservers();
                virtual void removeObservers();
};

typedef boost::shared_ptr<class ViewportListener> ViewportListenerPtr;

class cxResource_EXPORT ViewportPreRenderListener : public ViewportListenerBase
{
public:
                ViewportPreRenderListener();
                virtual ~ViewportPreRenderListener();
                virtual void callback();
                void setModified();

protected:
                virtual void addObservers();
                virtual void removeObservers();
private:
                bool mModified;
};

typedef boost::shared_ptr<class ViewportPreRenderListener> ViewportPreRenderListenerPtr;

}

#endif /* CXVIEWPORTLISTENER_H_ */