3D widget for manipulating a box More...

#include <vtkBoxWidget2.h>

Inheritance diagram for vtkBoxWidget2:

Collaboration diagram for vtkBoxWidget2:

Public Member Functions
void	SetRepresentation (vtkBoxRepresentation *r)
	Specify an instance of vtkWidgetRepresentation used to represent this widget in the scene.

void	CreateDefaultRepresentation () override
	Create the default widget representation if one is not set.

void	SetEnabled (int enabling) override
	Override superclasses' SetEnabled() method because the line widget must enable its internal handle widgets.


virtual void	SetTranslationEnabled (vtkTypeBool)
	Control the behavior of the widget (i.e., how it processes events).

virtual vtkTypeBool	GetTranslationEnabled ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	TranslationEnabledOn ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	TranslationEnabledOff ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	SetScalingEnabled (vtkTypeBool)
	Control the behavior of the widget (i.e., how it processes events).

virtual vtkTypeBool	GetScalingEnabled ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	ScalingEnabledOn ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	ScalingEnabledOff ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	SetRotationEnabled (vtkTypeBool)
	Control the behavior of the widget (i.e., how it processes events).

virtual vtkTypeBool	GetRotationEnabled ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	RotationEnabledOn ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	RotationEnabledOff ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	SetMoveFacesEnabled (vtkTypeBool)
	Control the behavior of the widget (i.e., how it processes events).

virtual vtkTypeBool	GetMoveFacesEnabled ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	MoveFacesEnabledOn ()
	Control the behavior of the widget (i.e., how it processes events).

virtual void	MoveFacesEnabledOff ()
	Control the behavior of the widget (i.e., how it processes events).

Public Member Functions inherited from vtkAbstractWidget
void	SetEnabled (int) override
	Methods for activating this widget.

vtkWidgetEventTranslator *	GetEventTranslator ()
	Get the event translator.

virtual void	CreateDefaultRepresentation ()=0
	Create the default widget representation if one is not set.

void	Render ()
	This method is called by subclasses when a render method is to be invoked on the vtkRenderWindowInteractor.

void	SetParent (vtkAbstractWidget *parent)
	Specifying a parent to this widget is used when creating composite widgets.

virtual vtkAbstractWidget *	GetParent ()

void	SetPriority (float) override
	Override the superclass method.

virtual void	SetProcessEvents (vtkTypeBool)
	Methods to change whether the widget responds to interaction.

virtual vtkTypeBool	GetProcessEvents ()
	Methods to change whether the widget responds to interaction.

virtual void	ProcessEventsOn ()
	Methods to change whether the widget responds to interaction.

virtual void	ProcessEventsOff ()
	Methods to change whether the widget responds to interaction.

vtkWidgetRepresentation *	GetRepresentation ()
	Return an instance of vtkWidgetRepresentation used to represent this widget in the scene.

virtual void	SetManagesCursor (vtkTypeBool)
	Turn on or off the management of the cursor.

virtual vtkTypeBool	GetManagesCursor ()
	Turn on or off the management of the cursor.

virtual void	ManagesCursorOn ()
	Turn on or off the management of the cursor.

virtual void	ManagesCursorOff ()
	Turn on or off the management of the cursor.

vtkAbstractWidget *	NewInstance () const
	Standard macros implementing standard VTK methods.

Public Member Functions inherited from vtkInteractorObserver
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkInteractorObserver *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

virtual void	SetEnabled (int)
	Methods for turning the interactor observer on and off, and determining its state.

int	GetEnabled ()

void	EnabledOn ()

void	EnabledOff ()

void	On ()

void	Off ()

virtual void	OnChar ()
	Sets up the keypress-i event.

virtual void	SetInteractor (vtkRenderWindowInteractor *iren)
	This method is used to associate the widget with the render window interactor.

virtual vtkRenderWindowInteractor *	GetInteractor ()
	This method is used to associate the widget with the render window interactor.

virtual float	GetPriority ()
	Set/Get the priority at which events are processed.

virtual void	PickingManagedOn ()
	Enable/Disable the use of a manager to process the picking.

virtual void	PickingManagedOff ()
	Enable/Disable the use of a manager to process the picking.

virtual void	SetPickingManaged (bool managed)
	Enable/Disable the use of a manager to process the picking.

virtual bool	GetPickingManaged ()
	Enable/Disable the use of a manager to process the picking.

virtual void	SetKeyPressActivation (vtkTypeBool)
	Enable/Disable of the use of a keypress to turn on and off the interactor observer.

virtual vtkTypeBool	GetKeyPressActivation ()
	Enable/Disable of the use of a keypress to turn on and off the interactor observer.

virtual void	KeyPressActivationOn ()
	Enable/Disable of the use of a keypress to turn on and off the interactor observer.

virtual void	KeyPressActivationOff ()
	Enable/Disable of the use of a keypress to turn on and off the interactor observer.

virtual void	SetKeyPressActivationValue (char)
	Specify which key press value to use to activate the interactor observer (if key press activation is enabled).

virtual char	GetKeyPressActivationValue ()
	Specify which key press value to use to activate the interactor observer (if key press activation is enabled).

virtual vtkRenderer *	GetDefaultRenderer ()
	Set/Get the default renderer to use when activating the interactor observer.

virtual void	SetDefaultRenderer (vtkRenderer *)
	Set/Get the default renderer to use when activating the interactor observer.

virtual vtkRenderer *	GetCurrentRenderer ()
	Set/Get the current renderer.

virtual void	SetCurrentRenderer (vtkRenderer *)
	Set/Get the current renderer.

void	GrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods enable an interactor observer to exclusively grab all events invoked by its associated vtkRenderWindowInteractor.

void	ReleaseFocus ()
	These methods enable an interactor observer to exclusively grab all events invoked by its associated vtkRenderWindowInteractor.

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

bool	GetDebug ()
	Get the value of the debug flag.

void	SetDebug (bool debugFlag)
	Set the value of the debug flag.

virtual void	Modified ()
	Update the modification time for this object.

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.

int	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not.

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.

virtual vtkTypeBool	IsA (const char *name)
	Return 1 if this class is the same type of (or a subclass of) the named class.

virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

virtual void	Delete ()
	Delete a VTK object.

virtual void	FastDelete ()
	Delete a reference to this object.

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream.

virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).

int	GetReferenceCount ()
	Return the current reference count of this object.

void	SetReferenceCount (int)
	Sets the reference count.

bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

Static Public Member Functions
static vtkBoxWidget2 *	New ()
	Instantiate the object.

Static Public Member Functions inherited from vtkAbstractWidget
static vtkTypeBool	IsTypeOf (const char *type)
	Standard macros implementing standard VTK methods.

static vtkAbstractWidget *	SafeDownCast (vtkObjectBase *o)
	Standard macros implementing standard VTK methods.

Static Public Member Functions inherited from vtkInteractorObserver
static vtkTypeBool	IsTypeOf (const char *type)

static vtkInteractorObserver *	SafeDownCast (vtkObjectBase *o)

static void	ComputeDisplayToWorld (vtkRenderer *ren, double x, double y, double z, double worldPt[4])
	Convenience methods for outside classes.

static void	ComputeWorldToDisplay (vtkRenderer *ren, double x, double y, double z, double displayPt[3])
	Convenience methods for outside classes.

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes.

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.

static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.

static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Types
enum	_WidgetState { Start = 0 , Active }

Protected Member Functions
	vtkBoxWidget2 ()

	~vtkBoxWidget2 () override

Protected Member Functions inherited from vtkAbstractWidget
	vtkAbstractWidget ()

	~vtkAbstractWidget () override

void	SetWidgetRepresentation (vtkWidgetRepresentation *r)

virtual void	SetCursor (int vtkNotUsed(state))

Protected Member Functions inherited from vtkInteractorObserver
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkInteractorObserver ()

	~vtkInteractorObserver () override

virtual void	RegisterPickers ()
	Register internal Pickers in the Picking Manager.

void	UnRegisterPickers ()
	Unregister internal pickers from the Picking Manager.

vtkPickingManager *	GetPickingManager ()
	Return the picking manager associated on the context on which the observer currently belong.

vtkAssemblyPath *	GetAssemblyPath (double X, double Y, double Z, vtkAbstractPropPicker *picker)
	Proceed to a pick, whether through the PickingManager if the picking is managed or directly using the picker, and return the assembly path.

int	RequestCursorShape (int requestedShape)

virtual void	StartInteraction ()
	Utility routines used to start and end interaction.

virtual void	EndInteraction ()
	Utility routines used to start and end interaction.

void	ComputeDisplayToWorld (double x, double y, double z, double worldPt[4])
	Helper method for subclasses.

void	ComputeWorldToDisplay (double x, double y, double z, double displayPt[3])
	Helper method for subclasses.

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events.

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Static Protected Member Functions
static void	SelectAction (vtkAbstractWidget *)

static void	EndSelectAction (vtkAbstractWidget *)

static void	TranslateAction (vtkAbstractWidget *)

static void	ScaleAction (vtkAbstractWidget *)

static void	MoveAction (vtkAbstractWidget *)

static void	SelectAction3D (vtkAbstractWidget *)

static void	EndSelectAction3D (vtkAbstractWidget *)

static void	MoveAction3D (vtkAbstractWidget *)

static void	StepAction3D (vtkAbstractWidget *)

static void	ProcessKeyEvents (vtkObject , unsigned long, void , void *)

Static Protected Member Functions inherited from vtkAbstractWidget
static void	ProcessEventsHandler (vtkObject object, unsigned long event, void clientdata, void *calldata)

Static Protected Member Functions inherited from vtkInteractorObserver
static void	ProcessEvents (vtkObject object, unsigned long event, void clientdata, void *calldata)
	Handles the char widget activation event.

Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Protected Attributes
int	WidgetState

vtkTypeBool	TranslationEnabled

vtkTypeBool	ScalingEnabled

vtkTypeBool	RotationEnabled

vtkTypeBool	MoveFacesEnabled

vtkCallbackCommand *	KeyEventCallbackCommand

Protected Attributes inherited from vtkAbstractWidget
vtkWidgetRepresentation *	WidgetRep

vtkTypeBool	ManagesCursor

vtkWidgetEventTranslator *	EventTranslator

vtkWidgetCallbackMapper *	CallbackMapper

vtkAbstractWidget *	Parent

void *	CallData

vtkTypeBool	ProcessEvents

int	LastDevice

Protected Attributes inherited from vtkInteractorObserver
int	Enabled

vtkCallbackCommand *	EventCallbackCommand

vtkCallbackCommand *	KeyPressCallbackCommand

float	Priority

bool	PickingManaged

vtkTypeBool	KeyPressActivation

char	KeyPressActivationValue

vtkRenderWindowInteractor *	Interactor

vtkRenderer *	CurrentRenderer

vtkRenderer *	DefaultRenderer

unsigned long	CharObserverTag

unsigned long	DeleteObserverTag

vtkObserverMediator *	ObserverMediator

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

typedef vtkAbstractWidget	Superclass
	Standard class methods for type information and printing.

static vtkTypeBool	IsTypeOf (const char *type)
	Standard class methods for type information and printing.

static vtkBoxWidget2 *	SafeDownCast (vtkObjectBase *o)
	Standard class methods for type information and printing.

virtual vtkTypeBool	IsA (const char *type)
	Standard class methods for type information and printing.

vtkBoxWidget2 *	NewInstance () const
	Standard class methods for type information and printing.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard class methods for type information and printing.

virtual vtkObjectBase *	NewInstanceInternal () const
	Standard class methods for type information and printing.

Additional Inherited Members
Public Types inherited from vtkAbstractWidget
typedef vtkInteractorObserver	Superclass
	Standard macros implementing standard VTK methods.

Public Types inherited from vtkInteractorObserver
typedef vtkObject	Superclass

Detailed Description

3D widget for manipulating a box

This 3D widget interacts with a vtkBoxRepresentation class (i.e., it handles the events that drive its corresponding representation). The representation is assumed to represent a region of interest that is represented by an arbitrarily oriented hexahedron (or box) with interior face angles of 90 degrees (i.e., orthogonal faces). The representation manifests seven handles that can be moused on and manipulated, plus the six faces can also be interacted with. The first six handles are placed on the six faces, the seventh is in the center of the box. In addition, a bounding box outline is shown, the "faces" of which can be selected for object rotation or scaling. A nice feature of vtkBoxWidget2, like any 3D widget, will work with the current interactor style. That is, if vtkBoxWidget2 does not handle an event, then all other registered observers (including the interactor style) have an opportunity to process the event. Otherwise, the vtkBoxWidget will terminate the processing of the event that it handles.

To use this widget, you generally pair it with a vtkBoxRepresentation (or a subclass). Various options are available in the representation for controlling how the widget appears, and how the widget functions.

Event Bindings:

By default, the widget responds to the following VTK events (i.e., it watches the vtkRenderWindowInteractor for these events):

If one of the seven handles are selected:
  LeftButtonPressEvent - select the appropriate handle
  LeftButtonReleaseEvent - release the currently selected handle
  MouseMoveEvent - move the handle
If one of the faces is selected:
  LeftButtonPressEvent - select a box face
  LeftButtonReleaseEvent - release the box face
  MouseMoveEvent - rotate the box
In all the cases, independent of what is picked, the widget responds to the
following VTK events:
  MiddleButtonPressEvent - translate the widget
  MiddleButtonReleaseEvent - release the widget
  RightButtonPressEvent - scale the widget's representation
  RightButtonReleaseEvent - stop scaling the widget
  MouseMoveEvent - scale (if right button) or move (if middle button) the widget

Event Bindings:

Note that the event bindings described above can be changed using this class's vtkWidgetEventTranslator. This class translates VTK events into the vtkBoxWidget2's widget events:

  vtkWidgetEvent::Select -- some part of the widget has been selected
  vtkWidgetEvent::EndSelect -- the selection process has completed
  vtkWidgetEvent::Scale -- some part of the widget has been selected
  vtkWidgetEvent::EndScale -- the selection process has completed
  vtkWidgetEvent::Translate -- some part of the widget has been selected
  vtkWidgetEvent::EndTranslate -- the selection process has completed
  vtkWidgetEvent::Move -- a request for motion has been invoked

Event Bindings:

In turn, when these widget events are processed, the vtkBoxWidget2 invokes the following VTK events on itself (which observers can listen for):

  vtkCommand::StartInteractionEvent (on vtkWidgetEvent::Select)
  vtkCommand::EndInteractionEvent (on vtkWidgetEvent::EndSelect)
  vtkCommand::InteractionEvent (on vtkWidgetEvent::Move)

Event Bindings:: This class, and the affiliated vtkBoxRepresentation, are second generation VTK widgets. An earlier version of this functionality was defined in the class vtkBoxWidget.

See also: vtkBoxRepresentation vtkBoxWidget

Events:: vtkCommand::EndInteractionEvent vtkCommand::InteractionEvent vtkCommand::StartInteractionEvent

Online Examples:

BoxWidget2

Tests:: vtkBoxWidget2 (Tests)

Definition at line 127 of file vtkBoxWidget2.h.

Member Typedef Documentation

◆ Superclass

typedef vtkAbstractWidget vtkBoxWidget2::Superclass

Standard class methods for type information and printing.

Definition at line 139 of file vtkBoxWidget2.h.

Member Enumeration Documentation

◆ _WidgetState

enum vtkBoxWidget2::_WidgetState

protected

Enumerator
Start
Active

Definition at line 194 of file vtkBoxWidget2.h.

Constructor & Destructor Documentation

◆ vtkBoxWidget2()

vtkBoxWidget2::vtkBoxWidget2 ( )

protected

◆ ~vtkBoxWidget2()

vtkBoxWidget2::~vtkBoxWidget2 ( )

overrideprotected

Member Function Documentation

◆ New()

static vtkBoxWidget2 * vtkBoxWidget2::New ( )

static

Instantiate the object.

◆ IsTypeOf()

static vtkTypeBool vtkBoxWidget2::IsTypeOf ( const char * type )

static

Standard class methods for type information and printing.

◆ IsA()

virtual vtkTypeBool vtkBoxWidget2::IsA ( const char * type )

virtual

Standard class methods for type information and printing.

Reimplemented from vtkAbstractWidget.

◆ SafeDownCast()

static vtkBoxWidget2 * vtkBoxWidget2::SafeDownCast ( vtkObjectBase * o )

static

Standard class methods for type information and printing.

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkBoxWidget2::NewInstanceInternal ( ) const

protectedvirtual

Standard class methods for type information and printing.

Reimplemented from vtkAbstractWidget.

◆ NewInstance()

vtkBoxWidget2 * vtkBoxWidget2::NewInstance ( ) const

Standard class methods for type information and printing.

◆ PrintSelf()

void vtkBoxWidget2::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Standard class methods for type information and printing.

Reimplemented from vtkAbstractWidget.

◆ SetRepresentation()

void vtkBoxWidget2::SetRepresentation ( vtkBoxRepresentation * r )

inline

Specify an instance of vtkWidgetRepresentation used to represent this widget in the scene.

Note that the representation is a subclass of vtkProp so it can be added to the renderer independent of the widget.

Definition at line 148 of file vtkBoxWidget2.h.