cxRenderLoop.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
All rights reserved.

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modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, 
   this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, 
   this list of conditions and the following disclaimer in the documentation 
   and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors 
   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
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=========================================================================*/
#ifndef CXRENDERLOOP_H
#define CXRENDERLOOP_H

#include "org_custusx_core_view_Export.h"

#include <QObject>
#include "cxForwardDeclarations.h"
class QTimer;
#include <QDateTime>
#include <set>

namespace cx
{
typedef boost::shared_ptr<class CyclicActionLogger> CyclicActionLoggerPtr;
class ViewCollectionWidget;

class org_custusx_core_view_EXPORT RenderLoop : public QObject
{
        Q_OBJECT
public:
        RenderLoop();
        void start();
        void stop();
        bool isRunning() const;
        void setRenderingInterval(int interval);
        void setSmartRender(bool val); 
        void setLogging(bool on);

        void clearViews();
        void addLayout(ViewCollectionWidget* layout);

        CyclicActionLoggerPtr getRenderTimer() { return mCyclicLogger; }

public slots:
        void requestPreRenderSignal();

signals:
        void preRender();
        void fps(int number); 

private slots:
        void timeoutSlot();

private:
        void sendRenderIntervalToTimer(int interval);
        void emitPreRenderIfRequested();
        void renderViews();
        bool pollForSmartRenderingThisCycle();
        int calculateTimeToNextRender();
        void emitFPSIfRequired();
        void dumpStatistics();

        QTimer* mTimer; 
        QDateTime mLastFullRender;
        QDateTime mLastBeginRender;

        CyclicActionLoggerPtr mCyclicLogger;

        bool mSmartRender;
        bool mPreRenderSignalRequested;
        int mBaseRenderInterval;
        bool mLogging;

//      typedef std::set<ViewPtr> ViewSet;
//      ViewSet mViews;
        std::vector<QPointer<ViewCollectionWidget> > mLayoutWidgets;
};

typedef boost::shared_ptr<RenderLoop> RenderLoopPtr;

} // namespace cx


#endif // CXRENDERLOOP_H