[vtkusers] Contourf plot with dynamic resize

[L1q1d]

 Hi to all, this is my first post in the mailing list. I'm trying to develop a plot application thant is able to create the controuf similar to matlab https://it.mathworks.com/help/matlab/ref/contourf.html
I succeed in creating something like it but my actual issues are place the plot in the center and resize dynamically with the window. This is the code that I'm using so far:

void CreateBaseData(vtkImageData* image)
{


    datastructure * dataInput = new datastructure(FILEPATH);


    image->SetDimensions(dataInput->shape()->Xsize, dataInput->shape()->Ysize, 1);
//    image->SetSpacing(dataInput->shape()->Xres,dataInput->shape()->Yres,0);


//    image->SetOrigin(dataInput->shape()->Xmin,dataInput->shape()->Ymin,0);


    image->AllocateScalars(VTK_DOUBLE,1);


    for(unsigned int x = 0; x <  dataInput->shape()->Xsize; x++)
    {
        for(unsigned int y = 0; y < dataInput->shape()->Ysize; y++)
        {
            double* pixel = static_cast<double *>(image->GetScalarPointer(x,y,0));
            pixel[0] = dataInput->z[y][x];
        }
    }
    delete dataInput;


    //image->Modified();
}


void RenderWindowUISingleInheritance::ModifiedHandler()
{
    ui->qvtkWidget->GetRenderWindow()->Render();
}




// Constructor
RenderWindowUISingleInheritance::RenderWindowUISingleInheritance(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::RenderWindowUISingleInheritanceUI)
{
    ui->setupUi(this);


    vtkSmartPointer<vtkInteractorStyleImage> style = vtkSmartPointer<vtkInteractorStyleImage>::New();


    ui->qvtkWidget->GetRenderWindow()->GetInteractor()->SetInteractorStyle(style);


    int numberOfContours = 15;


    double scalarRange[2];


    float levels[] = { 0.4, 1.0, 2.0, 4, 10.0, 20.0, 40, 100, 200, 400, 1000, 2000, 4000, 10000, 20000, 40000 };


    vtkSmartPointer<vtkImageData> colorImage = vtkSmartPointer<vtkImageData>::New();
    vtkSmartPointer<vtkLookupTable> lut = vtkSmartPointer<vtkLookupTable>::New();
    vtkSmartPointer<vtkImageDataGeometryFilter> convert = vtkSmartPointer<vtkImageDataGeometryFilter>::New();
    vtkSmartPointer<vtkBandedPolyDataContourFilter> bf = vtkSmartPointer<vtkBandedPolyDataContourFilter>::New();
    vtkSmartPointer<vtkPolyDataMapper2D> filledContourMapper = vtkSmartPointer<vtkPolyDataMapper2D>::New();
    vtkSmartPointer<vtkPolyDataMapper2D> contourLineMapperer =vtkSmartPointer<vtkPolyDataMapper2D>::New();


    vtkSmartPointer<vtkRenderer> ren1 = vtkSmartPointer<vtkRenderer>::New();


    vtkSmartPointer<vtkActor2D> filledContourActor =vtkSmartPointer<vtkActor2D>::New();
    vtkSmartPointer<vtkActor2D> contourLineActor = vtkSmartPointer<vtkActor2D>::New();
    vtkSmartPointer<vtkCubeAxesActor> cubeAxesActor = vtkSmartPointer<vtkCubeAxesActor>::New();
    vtkSmartPointer<vtkScalarBarActor> scalarBarActor =vtkSmartPointer<vtkScalarBarActor>::New();
    CreateBaseData(colorImage);


    colorImage->GetScalarRange(scalarRange);


    int l_min;
    int l_max;
    for (l_min=numberOfContours-1;l_min>=0;l_min--) {
        if (levels[l_min] <= scalarRange[0]) break;
    }


    for (l_max=0;l_max<numberOfContours;l_max++) {


        if (levels[l_max] > scalarRange[1]) break;
    }
    numberOfContours = l_max - l_min;


//    colormap::setColorMap(lut,1,1);


    char label[10];
    for (vtkIdType i = l_min; i < numberOfContours+1; ++i)
    {
        //std::cout << lut->GetAnnotatedValue(i).ToString() << std::endl;


        sprintf(label,"%4.2f",levels[i]);
        lut->SetAnnotation(i, label);
    }


    convert->SetInputData(colorImage);
    bf->SetInputConnection(convert->GetOutputPort());
    bf->SetNumberOfContours(numberOfContours);
    for (int i=l_min;i<l_max;i++){


        bf->SetValue(i,levels[i]);
    }


    bf->GenerateContourEdgesOn();


    filledContourMapper->SetInputConnection(bf->GetOutputPort());
    filledContourMapper->SetScalarModeToUseCellData();
    //    filledContourMapper->SetColorModeToMapScalars();
    filledContourMapper->SetScalarRange(0,numberOfContours);
    filledContourMapper->SetLookupTable(lut);


    filledContourActor->SetMapper(filledContourMapper);


    filledContourActor->PickableOn();


    filledContourActor->GetPosition2Coordinate()->SetValue(0.17, 0.8);
    filledContourActor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
    filledContourActor->GetPositionCoordinate()->SetValue(0.82, 0.1);




    filledContourActor->SetWidth( 0.7 );
    filledContourActor->SetHeight( 0.1 );
     filledContourActor->SetPosition( 0.1, 0.01 );











    contourLineMapperer->SetInputData(bf->GetContourEdgesOutput());

    contourLineMapperer->ScalarVisibilityOn();

    contourLineActor->SetMapper(contourLineMapperer);
    contourLineActor->GetProperty()->SetLineWidth(0.5);
    contourLineActor->GetProperty()->SetColor(0., 0., 0.);

    scalarBarActor->SetLookupTable(filledContourMapper->GetLookupTable());
    scalarBarActor->SetNumberOfLabels(numberOfContours);
    scalarBarActor->SetOrientationToHorizontal();
    scalarBarActor->SetPosition(0.05,0.2);
    scalarBarActor->SetWidth(0.9);
    scalarBarActor->SetHeight(0.05);


    scalarBarActor->SetDrawTickLabels(0);
    scalarBarActor->SetDrawAnnotations(1);
    scalarBarActor->GetAnnotationTextProperty()->SetFontFamilyToCourier();
    //scalarBar->GetAnnotationTextProperty()->SetVerticalJustificationToCentered();
    scalarBarActor->GetAnnotationTextProperty()->BoldOff();
    scalarBarActor->GetAnnotationTextProperty()->ItalicOff();
    scalarBarActor->GetAnnotationTextProperty()->ShadowOff() ;
    scalarBarActor->GetAnnotationTextProperty()->SetColor(0, 0, 0);
    scalarBarActor->GetAnnotationTextProperty()->SetJustificationToRight();

    scalarBarActor->SetUseBounds(true);

//    cubeAxesActor->SetBounds(filledContourMapper->GetBounds());
    cubeAxesActor->SetCamera(ren1->GetActiveCamera());
    cubeAxesActor->GetTitleTextProperty(0)->SetColor(0.0, 0.0, 0.0);
    cubeAxesActor->GetLabelTextProperty(0)->SetColor(0.0, 0.0, 0.0);


    cubeAxesActor->GetTitleTextProperty(1)->SetColor(0.0, 0.0, 0.0);
    cubeAxesActor->GetLabelTextProperty(1)->SetColor(0.0, 0.0, 0.0);


    cubeAxesActor->DrawXGridlinesOn();
    cubeAxesActor->DrawYGridlinesOn();
    cubeAxesActor->DrawZGridlinesOff();








    cubeAxesActor->GetXAxesLinesProperty()->SetColor(0.0, 0.0,0.0);
    cubeAxesActor->GetYAxesLinesProperty()->SetColor(0.0, 0.0,0.0);




    cubeAxesActor->GetYAxesGridlinesProperty ()->SetColor(0,0,0);
    cubeAxesActor->GetXAxesGridlinesProperty ()->SetColor(0,0,0);


    cubeAxesActor->SetTickLocationToOutside();


    //    cubeAxesActor->SetGridLineLocation(cubeAxesActor->VTK_GRID_LINES_CLOSEST);




    ren1->SetBackground(1, 1, 1);




    // Add the actors
    ren1->AddActor(filledContourActor);




    ren1->AddActor(contourLineActor);


    ren1->AddActor(scalarBarActor);
//    ren1->AddActor(cubeAxesActor);


    ren1->ResetCamera();




    // VTK/Qt wedded
    ui->qvtkWidget->GetRenderWindow()->AddRenderer(ren1);




    ui->qvtkWidget->GetRenderWindow()->AddObserver(vtkCommand::ModifiedEvent,this,&RenderWindowUISingleInheritance::ModifiedHandler);




    // Set up action signals and slots
    connect(ui->actionExit, SIGNAL(triggered()), this, SLOT(slotExit()));




}


void RenderWindowUISingleInheritance::slotExit() 
{
    qApp->exit();
}


RenderWindowUISingleInheritance::~RenderWindowUISingleInheritance() {
    delete ui;
};
Do you have any suggestion?
Thanks
Mattia
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