io/fwVtkIO/src/fwVtkIO/MeshReader.cpp

/* ***** BEGIN LICENSE BLOCK *****
 * FW4SPL - Copyright (C) IRCAD, 2009-2015.
 * Distributed under the terms of the GNU Lesser General Public License (LGPL) as
 * published by the Free Software Foundation.
 * ****** END LICENSE BLOCK ****** */

#include "fwVtkIO/helper/Mesh.hpp"
#include "fwVtkIO/MeshReader.hpp"
#include "fwVtkIO/helper/vtkLambdaCommand.hpp"

#include <fwCore/base.hpp>

#include <fwDataIO/reader/registry/macros.hpp>

#include <fwJobs/IJob.hpp>
#include <fwJobs/Observer.hpp>

#include <vtkGenericDataObjectReader.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>

fwDataIOReaderRegisterMacro( ::fwVtkIO::MeshReader );

namespace fwVtkIO
{
//------------------------------------------------------------------------------

MeshReader::MeshReader(::fwDataIO::reader::IObjectReader::Key key) :
    ::fwData::location::enableSingleFile< ::fwDataIO::reader::IObjectReader >(this),
    m_job(::fwJobs::Observer::New("Mesh reader"))
{
    SLM_TRACE_FUNC();
}

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

MeshReader::~MeshReader()
{
    SLM_TRACE_FUNC();
}

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

void MeshReader::read()
{
    assert( !m_object.expired() );
    assert( m_object.lock() );

    ::fwData::Mesh::sptr pMesh = getConcreteObject();

    using namespace fwVtkIO::helper;
    vtkSmartPointer< vtkGenericDataObjectReader > reader = vtkSmartPointer< vtkGenericDataObjectReader >::New();
    reader->SetFileName(this->getFile().string().c_str());

    vtkSmartPointer< vtkLambdaCommand > progressCallback;

    progressCallback = vtkSmartPointer< vtkLambdaCommand >::New();
    progressCallback->SetCallback(
        [&](vtkObject* caller, long unsigned int, void*)
        {
            auto filter = static_cast< vtkGenericDataObjectReader* >(caller);
            m_job->doneWork(filter->GetProgress() * 100);
        }
        );
    reader->AddObserver(vtkCommand::ProgressEvent, progressCallback);

    m_job->addSimpleCancelHook([&] { reader->AbortExecuteOn(); });

    reader->Update();

    vtkDataObject *obj = reader->GetOutput();
    vtkPolyData* mesh  = vtkPolyData::SafeDownCast(obj);
    FW_RAISE_IF("MeshReader cannot read VTK Mesh file : "<< this->getFile().string(), !mesh);
    ::fwVtkIO::helper::Mesh::fromVTKMesh(mesh, pMesh);

    m_job->finish();
}

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

std::string MeshReader::extension()
{
    return ".vtk";
}

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

::fwJobs::IJob::sptr MeshReader::getJob() const
{
    return m_job;
}

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

} // namespace fwVtkIO