cxRenderWindowFactory.h

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.
                 
Copyright (c) SINTEF Department of Medical Technology.
All rights reserved.
                 
CustusX is released under a BSD 3-Clause license.
                 
See Lisence.txt (https://github.com/SINTEFMedtek/CustusX/blob/master/License.txt) for details.
=========================================================================*/

#ifndef CXRENDERWINDOWFACTORY_H
#define CXRENDERWINDOWFACTORY_H

#include "cxResourceVisualizationExport.h"

#include <map>
#include <QString>
#include <boost/smart_ptr.hpp>
#include "vtkForwardDeclarations.h"
#include "cxForwardDeclarations.h"
#include "cxSharedContextCreatedCallback.h"

class QVTKWidget;

namespace cx
{
typedef boost::shared_ptr<class RenderWindowFactory> RenderWindowFactoryPtr;

class cxResourceVisualization_EXPORT RenderWindowFactory : public QObject
{
        Q_OBJECT
public:
        RenderWindowFactory();
        vtkRenderWindowPtr getRenderWindow(QString uid, bool offScreenRendering = false);
        vtkRenderWindowPtr getSharedRenderWindow() const;

        SharedOpenGLContextPtr getSharedOpenGLContext() const;
        bool renderWindowExists(QString uid);

private:
        //Important: keep private, only the SharedContextCreatedCallback::Execute should be able to set the shared render window.
        void setSharedRenderWindow(vtkRenderWindowPtr sharedRenderWindow);
        friend void SharedContextCreatedCallback::Execute(vtkObject *view, unsigned long eventId, void*cbo);

        vtkRenderWindowPtr createRenderWindow(QString uid, bool offScreenRendering);
        void preventSharedContextRenderWindowFromBeingShownOnScreen(vtkRenderWindowPtr renderWindow);

        vtkRenderWindowPtr mSharedRenderWindow;
        std::map<QString, vtkRenderWindowPtr> mRenderWindows;
        SharedContextCreatedCallbackPtr mSharedContextCreatedCallback;
        SharedOpenGLContextPtr mSharedOpenGLContext;
        QVTKWidget* mQvtkWidgetForHidingSharedContextRenderWindow;

        static bool mInstanceExisting;

};
}//cx

#endif // CXRENDERWINDOWFACTORY_H