Detailed Description

Widget containing the 3d VTK scene view.

Definition at line 17 of file VisualizationWidget.h.

#include <VisualizationWidget.h>

Inheritance diagram for VisualizationWidget:

Collaboration diagram for VisualizationWidget:

Public Slots
void	updateView ()
	Updates the the 3d view.
void	showAll (int x, int y, int z)
	Shows the entire scene on the views. x,y,z are in {-1, 0, 1} and specify from which direction the scene is displayed.
void	updateViewOnLoad ()
	Updates the view only or additionally shows the entire scene.
void	screenshot (QString filename, int magnification)
	Saves a magnified image of the current render window to a file.
vtkRenderer *	renderer () const
	Returns the vtk renderer.
void	setCursorShape (Qt::CursorShape shape)
	Sets the widgets cursor shape.

Public Member Functions
	VisualizationWidget (QWidget *parent=nullptr)
	Constructor.
	~VisualizationWidget () override
	Destructor.
VtkCustomInteractorStyle *	interactorStyle () const
	Returns the VtkCustomInteractorStyle.
VtkPickCallback *	vtkPickCallback () const
	Returns the VtkPickCallback.
void	setShowAllOnLoad (bool show)
	See updateViewOnLoad().

Protected Slots
void	on_showAllPushButton_pressed ()
	Resets the camera to view the entire scene.

Protected Member Functions
void	on_rotateXPosPushButton_pressed ()
	Reset camera to view entire scene from +x perspective.
void	on_rotateXNegPushButton_pressed ()
	Reset camera to view entire scene from -x perspective.
void	on_rotateYPosPushButton_pressed ()
	Reset camera to view entire scene from +y perspective.
void	on_rotateYNegPushButton_pressed ()
	Reset camera to view entire scene from -y perspective.
void	on_rotateZPosPushButton_pressed ()
	Reset camera to view entire scene from +z perspective.
void	on_rotateZNegPushButton_pressed ()
	Reset camera to view entire scene from -z perspective.
void	on_zoomToolButton_toggled (bool checked)
	Toggles rectangular zooming mode.
void	on_highlightToolButton_toggled (bool checked)
	Toggles the display of bounding boxes around.
void	on_orthogonalProjectionToolButton_toggled (bool checked)
	Toggles the orthogonal projection.
void	on_screenshotPushButton_pressed ()
	Saves a screenshot.

Private Attributes
vtkRenderer *	_vtkRender {nullptr}
vtkOrientationMarkerWidget *	_markerWidget {nullptr}
VtkCustomInteractorStyle *	_interactorStyle {nullptr}
VtkPickCallback *	_vtkPickCallback {nullptr}
bool	_isShowAllOnLoad

Constructor & Destructor Documentation

◆ VisualizationWidget()

VisualizationWidget::VisualizationWidget ( QWidget * parent = nullptr )

explicit

Constructor.

Definition at line 37 of file VisualizationWidget.cpp.

    : QWidget(parent)
{
    this->setupUi(this);
 
    vtkNew<vtkRenderer> ren;
    _vtkRender = ren;
 
    vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
    vtkWidget->setRenderWindow(renderWindow);
    vtkWidget->renderWindow()->AddRenderer(ren);
 
    _interactorStyle = VtkCustomInteractorStyle::New();
    renderWindow->GetInteractor()->SetInteractorStyle(_interactorStyle);
    _interactorStyle->SetDefaultRenderer(ren);
 
    _vtkPickCallback = VtkPickCallback::New();
    vtkSmartPointer<vtkCellPicker> picker =
        vtkSmartPointer<vtkCellPicker>::New();
    picker->AddObserver(vtkCommand::EndPickEvent, _vtkPickCallback);
    renderWindow->GetInteractor()->SetPicker(picker);
 
    QSettings settings;
 
    ren->SetBackground(0.0, 0.0, 0.0);
 
    // Create an orientation marker using vtkAxesActor
    vtkSmartPointer<vtkAxesActor> axesActor =
        vtkSmartPointer<vtkAxesActor>::New();
    _markerWidget = vtkOrientationMarkerWidget::New();
    _markerWidget->SetOrientationMarker(axesActor);
    _markerWidget->SetInteractor(renderWindow->GetInteractor());
    _markerWidget->EnabledOn();
    _markerWidget->InteractiveOff();
 
    _isShowAllOnLoad = settings.value("resetViewOnLoad", true).toBool();
 
    // Set alternate cursor shapes
    connect(_interactorStyle, SIGNAL(cursorChanged(Qt::CursorShape)), this,
            SLOT(setCursorShape(Qt::CursorShape)));
 
    connect((QObject*)_interactorStyle, SIGNAL(requestViewUpdate()), this,
            SLOT(updateView()));
}

References _interactorStyle, _isShowAllOnLoad, _markerWidget, _vtkPickCallback, _vtkRender, VtkCustomInteractorStyle::New(), VtkPickCallback::New(), setCursorShape(), and updateView().

◆ ~VisualizationWidget()

VisualizationWidget::~VisualizationWidget ( )

override

Destructor.

Definition at line 82 of file VisualizationWidget.cpp.

{
    _vtkPickCallback->Delete();
    _interactorStyle->Delete();
    _markerWidget->Delete();
}

References _interactorStyle, _markerWidget, and _vtkPickCallback.

Member Function Documentation

◆ interactorStyle()

VtkCustomInteractorStyle * VisualizationWidget::interactorStyle ( ) const

Returns the VtkCustomInteractorStyle.

Definition at line 89 of file VisualizationWidget.cpp.

{
    return _interactorStyle;
}

References _interactorStyle.

Referenced by on_zoomToolButton_toggled().

◆ on_highlightToolButton_toggled()

void VisualizationWidget::on_highlightToolButton_toggled ( bool checked )

protected

Toggles the display of bounding boxes around.

Definition at line 159 of file VisualizationWidget.cpp.

{
    _interactorStyle->setHighlightActor(checked);
}

References _interactorStyle.

◆ on_orthogonalProjectionToolButton_toggled()

void VisualizationWidget::on_orthogonalProjectionToolButton_toggled ( bool checked )

protected

Toggles the orthogonal projection.

Definition at line 164 of file VisualizationWidget.cpp.

{
    _vtkRender->GetActiveCamera()->SetParallelProjection(checked);
    this->updateView();
}

References _vtkRender, and updateView().

◆ on_rotateXNegPushButton_pressed()

void VisualizationWidget::on_rotateXNegPushButton_pressed ( )

inlineprotected

Reset camera to view entire scene from -x perspective.

Definition at line 67 of file VisualizationWidget.h.

67{ this->showAll(-1,0,0); };

VisualizationWidget::showAll

void showAll(int x, int y, int z)

Shows the entire scene on the views. x,y,z are in {-1, 0, 1} and specify from which direction the sce...

Definition VisualizationWidget.cpp:104

References showAll().

◆ on_rotateXPosPushButton_pressed()

void VisualizationWidget::on_rotateXPosPushButton_pressed ( )

inlineprotected

Reset camera to view entire scene from +x perspective.

Definition at line 64 of file VisualizationWidget.h.

64{ this->showAll(1,0,0); };

References showAll().

◆ on_rotateYNegPushButton_pressed()

void VisualizationWidget::on_rotateYNegPushButton_pressed ( )

inlineprotected

Reset camera to view entire scene from -y perspective.

Definition at line 73 of file VisualizationWidget.h.

73{ this->showAll(0,-1,0); };

References showAll().

◆ on_rotateYPosPushButton_pressed()

void VisualizationWidget::on_rotateYPosPushButton_pressed ( )

inlineprotected

Reset camera to view entire scene from +y perspective.

Definition at line 70 of file VisualizationWidget.h.

70{ this->showAll(0,1,0); };

References showAll().

◆ on_rotateZNegPushButton_pressed()

void VisualizationWidget::on_rotateZNegPushButton_pressed ( )

inlineprotected

Reset camera to view entire scene from -z perspective.

Definition at line 79 of file VisualizationWidget.h.

79{ this->showAll(0,0,-1); };

References showAll().

◆ on_rotateZPosPushButton_pressed()

void VisualizationWidget::on_rotateZPosPushButton_pressed ( )

inlineprotected

Reset camera to view entire scene from +z perspective.

Definition at line 76 of file VisualizationWidget.h.

76{ this->showAll(0,0,1); };

References showAll().

◆ on_screenshotPushButton_pressed()

void VisualizationWidget::on_screenshotPushButton_pressed ( )

protected

Saves a screenshot.

Definition at line 171 of file VisualizationWidget.cpp.

{
    QSettings settings;
    QString filename = QFileDialog::getSaveFileName(
        this, tr("Save screenshot"),
        settings.value("lastScreenshotDir").toString(), "PNG file (*.png)");
    if (filename.count() > 4)
    {
        bool ok;
        int magnification = QInputDialog::getInt(
            this, tr("Screenshot magnification"),
            tr("Enter a magnification factor for the resulting image."), 2, 1,
            10, 1, &ok);
        if (ok)
        {
            QDir dir(filename);
            settings.setValue("lastScreenshotDir", dir.absolutePath());
            this->screenshot(filename, magnification);
        }
    }
}

References screenshot().

◆ on_showAllPushButton_pressed

void VisualizationWidget::on_showAllPushButton_pressed ( )

inlineprotectedslot

Resets the camera to view the entire scene.

Definition at line 61 of file VisualizationWidget.h.

61{ this->showAll(0,0,1); };

References showAll().

◆ on_zoomToolButton_toggled()

void VisualizationWidget::on_zoomToolButton_toggled ( bool checked )

protected

Toggles rectangular zooming mode.

Definition at line 137 of file VisualizationWidget.cpp.

{
    if (checked)
    {
        vtkSmartPointer<vtkInteractorStyleRubberBandZoom> interactorStyle =
            vtkSmartPointer<vtkInteractorStyleRubberBandZoom>::New();
        vtkWidget->renderWindow()->GetInteractor()->SetInteractorStyle(
            interactorStyle);
        QCursor cursor;
        cursor.setShape(Qt::CrossCursor);
        vtkWidget->setCursor(cursor);
    }
    else
    {
        vtkWidget->renderWindow()->GetInteractor()->SetInteractorStyle(
            _interactorStyle);
        QCursor cursor;
        cursor.setShape(Qt::ArrowCursor);
        vtkWidget->setCursor(cursor);
    }
}

References _interactorStyle, and interactorStyle().

◆ renderer

vtkRenderer * VisualizationWidget::renderer ( ) const

inlineslot

Returns the vtk renderer.

Definition at line 53 of file VisualizationWidget.h.

53{ return _vtkRender; }

References _vtkRender.

◆ screenshot

void VisualizationWidget::screenshot	(	QString	filename,
		int	magnification )

slot

Saves a magnified image of the current render window to a file.

Definition at line 193 of file VisualizationWidget.cpp.

{
    vtkSmartPointer<vtkWindowToImageFilter> windowToImageFilter =
        vtkSmartPointer<vtkWindowToImageFilter>::New();
    windowToImageFilter->SetInput(vtkWidget->renderWindow());
    // Set the resolution of the output image
    // magnification times the current resolution of vtk render window
    windowToImageFilter->SetScale(magnification);
    // Also record the alpha (transparency) channel
    windowToImageFilter->SetInputBufferTypeToRGBA();
    windowToImageFilter->Update();
 
    vtkSmartPointer<vtkPNGWriter> writer = vtkSmartPointer<vtkPNGWriter>::New();
    writer->SetFileName(filename.toStdString().c_str());
    writer->SetInputData(windowToImageFilter->GetOutput());
    writer->Write();
 
    this->updateView();
}

References updateView().

Referenced by on_screenshotPushButton_pressed().

◆ setCursorShape

void VisualizationWidget::setCursorShape ( Qt::CursorShape shape )

slot

Sets the widgets cursor shape.

Definition at line 213 of file VisualizationWidget.cpp.

{
    this->setCursor(QCursor(shape));
}

Referenced by VisualizationWidget().

◆ setShowAllOnLoad()

void VisualizationWidget::setShowAllOnLoad ( bool show )

inline

See updateViewOnLoad().

Definition at line 36 of file VisualizationWidget.h.

36{ _isShowAllOnLoad = show; }

References _isShowAllOnLoad.

◆ showAll

void VisualizationWidget::showAll	(	int	x,
		int	y,
		int	z )

slot

Shows the entire scene on the views. x,y,z are in {-1, 0, 1} and specify from which direction the scene is displayed.

Definition at line 104 of file VisualizationWidget.cpp.

{
    _vtkRender->ResetCamera();
    vtkCamera* cam = _vtkRender->GetActiveCamera();
    double* fp = cam->GetFocalPoint();
    double* p = cam->GetPosition();
    double dist = std::sqrt(vtkMath::Distance2BetweenPoints(p, fp));
    cam->SetPosition(fp[0] + (x * dist), fp[1] + (y * dist),
                     fp[2] + (z * dist));
 
    if (x != 0 || y != 0)
    {
        cam->SetViewUp(0.0, 0.0, 1.0);
    }
    else
    {
        cam->SetViewUp(0.0, 1.0, 0.0);
    }
    this->updateView();
}

References _vtkRender, and updateView().

Referenced by on_rotateXNegPushButton_pressed(), on_rotateXPosPushButton_pressed(), on_rotateYNegPushButton_pressed(), on_rotateYPosPushButton_pressed(), on_rotateZNegPushButton_pressed(), on_rotateZPosPushButton_pressed(), on_showAllPushButton_pressed(), and updateViewOnLoad().

◆ updateView

void VisualizationWidget::updateView ( )

slot

Updates the the 3d view.

Definition at line 99 of file VisualizationWidget.cpp.

{
    vtkWidget->renderWindow()->Render();
}

Referenced by VisualizationWidget(), on_orthogonalProjectionToolButton_toggled(), screenshot(), showAll(), and updateViewOnLoad().

◆ updateViewOnLoad

void VisualizationWidget::updateViewOnLoad ( )

slot

Updates the view only or additionally shows the entire scene.

Definition at line 125 of file VisualizationWidget.cpp.

{
    if (_isShowAllOnLoad)
    {
        this->showAll(0, 0, 1);
    }
    else
    {
        updateView();
    }
}

References _isShowAllOnLoad, showAll(), and updateView().

◆ vtkPickCallback()

VtkPickCallback * VisualizationWidget::vtkPickCallback ( ) const

Returns the VtkPickCallback.

Definition at line 94 of file VisualizationWidget.cpp.

{
    return _vtkPickCallback;
}

References _vtkPickCallback.

Member Data Documentation

◆ _interactorStyle

VtkCustomInteractorStyle* VisualizationWidget::_interactorStyle {nullptr}

private

Definition at line 96 of file VisualizationWidget.h.

96{nullptr};

Referenced by VisualizationWidget(), ~VisualizationWidget(), interactorStyle(), on_highlightToolButton_toggled(), and on_zoomToolButton_toggled().

◆ _isShowAllOnLoad

bool VisualizationWidget::_isShowAllOnLoad

private

Definition at line 98 of file VisualizationWidget.h.

Referenced by VisualizationWidget(), setShowAllOnLoad(), and updateViewOnLoad().

◆ _markerWidget

vtkOrientationMarkerWidget* VisualizationWidget::_markerWidget {nullptr}

private

Definition at line 95 of file VisualizationWidget.h.

95{nullptr};

Referenced by VisualizationWidget(), and ~VisualizationWidget().

◆ _vtkPickCallback

VtkPickCallback* VisualizationWidget::_vtkPickCallback {nullptr}

private

Definition at line 97 of file VisualizationWidget.h.

97{nullptr};

Referenced by VisualizationWidget(), ~VisualizationWidget(), and vtkPickCallback().

◆ _vtkRender

vtkRenderer* VisualizationWidget::_vtkRender {nullptr}

private

Definition at line 94 of file VisualizationWidget.h.

94{nullptr};

Referenced by VisualizationWidget(), on_orthogonalProjectionToolButton_toggled(), renderer(), and showAll().

The documentation for this class was generated from the following files:

Detailed Description

Public Slots

Public Member Functions

Protected Slots

Protected Member Functions

Private Attributes

Constructor & Destructor Documentation

◆ VisualizationWidget()

◆ ~VisualizationWidget()

Member Function Documentation

◆ interactorStyle()

◆ on_highlightToolButton_toggled()

◆ on_orthogonalProjectionToolButton_toggled()

◆ on_rotateXNegPushButton_pressed()

◆ on_rotateXPosPushButton_pressed()

◆ on_rotateYNegPushButton_pressed()

◆ on_rotateYPosPushButton_pressed()

◆ on_rotateZNegPushButton_pressed()

◆ on_rotateZPosPushButton_pressed()

◆ on_screenshotPushButton_pressed()

◆ on_showAllPushButton_pressed

◆ on_zoomToolButton_toggled()

◆ renderer

◆ screenshot

◆ setCursorShape

◆ setShowAllOnLoad()

◆ showAll

◆ updateView

◆ updateViewOnLoad

◆ vtkPickCallback()

Member Data Documentation

◆ _interactorStyle

◆ _isShowAllOnLoad

◆ _markerWidget

◆ _vtkPickCallback

◆ _vtkRender