ProgressItkToFw.hxx

/* ***** BEGIN LICENSE BLOCK *****
 * FW4SPL - Copyright (C) IRCAD, 2009-2018.
 * Distributed under the terms of the GNU Lesser General Public License (LGPL) as
 * published by the Free Software Foundation.
 * ****** END LICENSE BLOCK ****** */

#pragma once

#ifndef __FWITKIO_HELPER_PROGRESSITKTOFW_HXX__
#define __FWITKIO_HELPER_PROGRESSITKTOFW_HXX__

#include <fwCore/base.hpp>

#include <itkCommand.h>
#include <itkEventObject.h>
#include <itkLightProcessObject.h>
#include <itkSmartPointer.h>

#include <limits>
#include <sstream>

namespace fwItkIO
{

class LocalCommand : public itk::Command
{
public:

    LocalCommand()
    {
    }

    typedef LocalCommand Self;
    typedef itk::SmartPointer<LocalCommand>      Pointer;
    itkNewMacro(Self);

    //------------------------------------------------------------------------------

    void Execute(itk::Object* caller, const itk::EventObject& event) override
    {
        itk::LightProcessObject* po = dynamic_cast<itk::LightProcessObject*>(caller);
        if( !po )
        {
            return;
        }
        float percent = po->GetProgress();
        OSLM_TRACE("LocalCommand::Execute '" << m_msg << "' " << percent );
        m_adviser->notifyProgress( percent, m_msg );
    }

    //------------------------------------------------------------------------------

    void Execute(const itk::Object* caller, const itk::EventObject& event) override
    {
        itk::LightProcessObject* po = dynamic_cast<itk::LightProcessObject*>( const_cast<itk::Object*>(caller));
        Execute(po, event);
    }

    std::string m_msg;
    SPTR(::fwTools::ProgressAdviser) m_adviser;
};

//------------------------------------------------------------------------------

template<typename OBSERVEE >
ProgressItkToFw<OBSERVEE >::ProgressItkToFw(OBSERVEE observee, SPTR(::fwTools::ProgressAdviser)observer,
                                            std::string msg) :
    m_observee( observee),
    m_obsTag(std::numeric_limits<unsigned long>::max()),
    m_initialized(false)
{
    typename LocalCommand::Pointer itkCallBack;
    itkCallBack            = LocalCommand::New();
    itkCallBack->m_msg     = msg;
    itkCallBack->m_adviser = observer;
    m_obsTag               = m_observee->AddObserver(itk::ProgressEvent(), itkCallBack );
    m_initialized          = true;
}

//------------------------------------------------------------------------------

template<typename OBSERVEE >
ProgressItkToFw<OBSERVEE >::~ProgressItkToFw()
{
    if( m_initialized)
    {
        m_observee->RemoveObserver(m_obsTag);
    }
}

}

#endif // __FWITKIO_HELPER_PROGRESSITKTOFW_HXX__