MainWindow::MainWindow()
{
    this->setupUi(this);

    std::string folder = "DICOM/DANE";

    // Read all the DICOM files in the specified directory.
    vtkSmartPointer<vtkDICOMImageReader> reader =
        vtkSmartPointer<vtkDICOMImageReader>::New();
    reader->SetDirectoryName(folder.c_str());
    reader->Update();

    vtkSmartPointer<vtkImageViewer2> imageViewerRight =
        vtkSmartPointer<vtkImageViewer2>::New();
    imageViewerRight->SetInputData(reader->GetOutput());
    imageViewerRight->GetRenderer()->ResetCamera();

    // Interactor style
    vtkSmartPointer<myVtkInteractorStyleImage> interactorStyle =
        vtkSmartPointer<myVtkInteractorStyleImage>::New();
    interactorStyle->SetImageViewer(imageViewerRight);

    // VTK/Qt wedded
    //this->wgt_xsection->GetRenderWindow()->AddRenderer(rendererLeft);
    this->wgt_3d      ->SetRenderWindow(imageViewerRight->GetRenderWindow());
    this->wgt_3d      ->GetRenderWindow()->GetInteractor()
            ->SetInteractorStyle(interactorStyle);
    this->wgt_3d->update();

    connect(this->actionExit, SIGNAL(triggered()), this, SLOT(slotExit()));
}