cxServiceTrackerListener.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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   this list of conditions and the following disclaimer.

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#ifndef CXSERVICETRACKERLISTENER_H_
#define CXSERVICETRACKERLISTENER_H_

#include <QSharedDataPointer>
#include <boost/function.hpp>
#include <boost/shared_ptr.hpp>
#undef REGISTERED //Needed on windows to avoid compiler error. Not sure why.
#include <ctkServiceEvent.h>
#include "ctkServiceTracker.h"
#include "ctkServiceTrackerCustomizer.h"
#include "ctkPluginContext.h"
#include <ctkPluginFramework.h>
#include "cxServiceTrackerCustomizer.h"


namespace cx
{
template <class T >
class ServiceTrackerListener
{

public:
        ServiceTrackerListener(ctkPluginContext* context,
                                                   boost::function<void (T*)> serviceAdded,
                                                   boost::function<void (T*)> serviceModified,
                                                         boost::function<void (T*)> serviceRemoved)
        {
                boost::shared_ptr<ServiceTrackerCustomizer<T> > customizer(new ServiceTrackerCustomizer<T>);
                mServiceTrackerCustomizer = customizer;
                mServiceTrackerCustomizer->setServiceAddedCallback(serviceAdded);
                mServiceTrackerCustomizer->setServiceModifiedCallback(serviceModified);
                mServiceTrackerCustomizer->setServiceRemovedCallback(serviceRemoved);
                mServiceTracker.reset(new ctkServiceTracker<T*>(context, mServiceTrackerCustomizer.get()));
        }

        ~ServiceTrackerListener()
        {
//              mServiceTracker->close();//For some reason this causes a crash if a service (that uses another service with a ServiceTrackerListener) have been removed
                //If close is needed: A possible workasround may be to clear all functions in mServiceTrackerCustomizer?
//              mServiceTracker.reset();
        }

        void open()
        {
                mServiceTracker->open();
        }

        T* getServiceFromName(QString name)
        {
                QList<T*> services = mServiceTracker->getServices();
                foreach(T* temp, services)
                        if(temp->getName() == name)
                                return temp;
                return NULL;
        }

        QList<T*> getServices()
        {
                return mServiceTracker->getServices();
        }

private:
        boost::shared_ptr<ServiceTrackerCustomizer<T> > mServiceTrackerCustomizer;
        boost::shared_ptr<ctkServiceTracker<T*> > mServiceTracker;
};
}//namespace cx

#endif /* CXSERVICETRACKERLISTENER_H_ */