an abstract superclass for 3D widgets More...

#include <vtk3DWidget.h>

Inheritance diagram for vtk3DWidget:

Collaboration diagram for vtk3DWidget:

Public Types
typedef vtkInteractorObserver	Superclass
Public Member Functions
virtual int	IsA (const char *type)
vtk3DWidget *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)

virtual void	PlaceWidget (double bounds[6])=0
virtual void	PlaceWidget ()
virtual void	PlaceWidget (double xmin, double xmax, double ymin, double ymax, double zmin, double zmax)

virtual void	SetProp3D (vtkProp3D *)
virtual vtkProp3D *	GetProp3D ()

virtual void	SetInputData (vtkDataSet *)
virtual void	SetInputConnection (vtkAlgorithmOutput *)
virtual vtkDataSet *	GetInput ()

virtual void	SetPlaceFactor (double)
virtual double	GetPlaceFactor ()

virtual void	SetHandleSize (double)
virtual double	GetHandleSize ()
Static Public Member Functions
static int	IsTypeOf (const char *type)
static vtk3DWidget *	SafeDownCast (vtkObjectBase *o)
Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtk3DWidget ()
	~vtk3DWidget ()
void	AdjustBounds (double bounds[6], double newBounds[6], double center[3])
double	SizeHandles (double factor)
virtual void	SizeHandles ()
void	UpdateInput ()
Protected Attributes
vtkProp3D *	Prop3D
vtk3DWidgetConnection *	ConnectionHolder
double	PlaceFactor
int	Placed
double	InitialBounds [6]
double	InitialLength
double	HandleSize
int	ValidPick
double	LastPickPosition [3]

Detailed Description

an abstract superclass for 3D widgets

vtk3DWidget is an abstract superclass for 3D interactor observers. These 3D widgets represent themselves in the scene, and have special callbacks associated with them that allows interactive manipulation of the widget. Inparticular, the difference between a vtk3DWidget and its abstract superclass vtkInteractorObserver is that vtk3DWidgets are "placed" in 3D space. vtkInteractorObservers have no notion of where they are placed, and may not exist in 3D space at all. 3D widgets also provide auxiliary functions like producing a transformation, creating polydata (for seeding streamlines, probes, etc.) or creating implicit functions. See the concrete subclasses for particulars.

Typically the widget is used by specifying a vtkProp3D or VTK dataset as input, and then invoking the "On" method to activate it. (You can also specify a bounding box to help position the widget.) Prior to invoking the On() method, the user may also wish to use the PlaceWidget() to initially position it. The 'i' (for "interactor") keypresses also can be used to turn the widgets on and off (methods exist to change the key value and enable keypress activiation).

To support interactive manipulation of objects, this class (and subclasses) invoke the events StartInteractionEvent, InteractionEvent, and EndInteractionEvent. These events are invoked when the vtk3DWidget enters a state where rapid response is desired: mouse motion, etc. The events can be used, for example, to set the desired update frame rate (StartInteractionEvent), operate on the vtkProp3D or other object (InteractionEvent), and set the desired frame rate back to normal values (EndInteractionEvent).

Note that the Priority attribute inherited from vtkInteractorObserver has a new default value which is now 0.5 so that all 3D widgets have a higher priority than the usual interactor styles.

See also:: vtkBoxWidget vtkPlaneWidget vtkLineWidget vtkPointWidget vtkSphereWidget vtkImplicitPlaneWidget

Events:: vtkCommand::PlaceWidgetEvent

Definition at line 69 of file vtk3DWidget.h.

Member Typedef Documentation

typedef vtkInteractorObserver vtk3DWidget::Superclass

Reimplemented from vtkInteractorObserver.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

Definition at line 72 of file vtk3DWidget.h.

Constructor & Destructor Documentation

vtk3DWidget::vtk3DWidget ( ) [protected]

vtk3DWidget::~vtk3DWidget ( ) [protected]

Member Function Documentation

static int vtk3DWidget::IsTypeOf ( const char * name ) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkInteractorObserver.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

virtual int vtk3DWidget::IsA ( const char * name ) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkInteractorObserver.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

static vtk3DWidget* vtk3DWidget::SafeDownCast ( vtkObjectBase * o ) [static]

Reimplemented from vtkInteractorObserver.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

virtual vtkObjectBase* vtk3DWidget::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkInteractorObserver.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

vtk3DWidget* vtk3DWidget::NewInstance ( ) const

Reimplemented from vtkInteractorObserver.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

void vtk3DWidget::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)		`[virtual]`

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkInteractorObserver.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

virtual void vtk3DWidget::PlaceWidget ( double bounds[6] ) [pure virtual]

This method is used to initially place the widget. The placement of the widget depends on whether a Prop3D or input dataset is provided. If one of these two is provided, they will be used to obtain a bounding box, around which the widget is placed. Otherwise, you can manually specify a bounds with the PlaceWidget(bounds) method. Note: PlaceWidget(bounds) is required by all subclasses; the other methods are provided as convenience methods.

Implemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, vtkImageCroppingRegionsWidget, and vtkPolyDataSourceWidget.

virtual void vtk3DWidget::PlaceWidget ( ) [virtual]

This method is used to initially place the widget. The placement of the widget depends on whether a Prop3D or input dataset is provided. If one of these two is provided, they will be used to obtain a bounding box, around which the widget is placed. Otherwise, you can manually specify a bounds with the PlaceWidget(bounds) method. Note: PlaceWidget(bounds) is required by all subclasses; the other methods are provided as convenience methods.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, and vtkPolyDataSourceWidget.

virtual void vtk3DWidget::PlaceWidget	(	double	xmin,
		double	xmax,
		double	ymin,
		double	ymax,
		double	zmin,
		double	zmax
	)		`[virtual]`

This method is used to initially place the widget. The placement of the widget depends on whether a Prop3D or input dataset is provided. If one of these two is provided, they will be used to obtain a bounding box, around which the widget is placed. Otherwise, you can manually specify a bounds with the PlaceWidget(bounds) method. Note: PlaceWidget(bounds) is required by all subclasses; the other methods are provided as convenience methods.

Reimplemented in vtkImagePlaneWidget, vtkSplineWidget, vtkBrokenLineWidget, vtkPlaneWidget, vtkBoxWidget, vtkLineWidget, vtkImplicitPlaneWidget, vtkImageTracerWidget, vtkPointWidget, vtkSphereWidget, and vtkPolyDataSourceWidget.

virtual void vtk3DWidget::SetProp3D ( vtkProp3D * ) [virtual]

Specify a vtkProp3D around which to place the widget. This is not required, but if supplied, it is used to initially position the widget.

virtual vtkProp3D* vtk3DWidget::GetProp3D ( ) [virtual]

Specify a vtkProp3D around which to place the widget. This is not required, but if supplied, it is used to initially position the widget.

virtual void vtk3DWidget::SetInputData ( vtkDataSet * ) [virtual]

Specify the input dataset. This is not required, but if supplied, and no vtkProp3D is specified, it is used to initially position the widget.

virtual void vtk3DWidget::SetInputConnection ( vtkAlgorithmOutput * ) [virtual]

Specify the input dataset. This is not required, but if supplied, and no vtkProp3D is specified, it is used to initially position the widget.

Reimplemented in vtkImagePlaneWidget.

virtual vtkDataSet* vtk3DWidget::GetInput ( ) [virtual]

Specify the input dataset. This is not required, but if supplied, and no vtkProp3D is specified, it is used to initially position the widget.

virtual void vtk3DWidget::SetPlaceFactor ( double ) [virtual]

Set/Get a factor representing the scaling of the widget upon placement (via the PlaceWidget() method). Normally the widget is placed so that it just fits within the bounding box defined in PlaceWidget(bounds). The PlaceFactor will make the widget larger (PlaceFactor > 1) or smaller (PlaceFactor < 1). By default, PlaceFactor is set to 0.5.

virtual double vtk3DWidget::GetPlaceFactor ( ) [virtual]

Set/Get a factor representing the scaling of the widget upon placement (via the PlaceWidget() method). Normally the widget is placed so that it just fits within the bounding box defined in PlaceWidget(bounds). The PlaceFactor will make the widget larger (PlaceFactor > 1) or smaller (PlaceFactor < 1). By default, PlaceFactor is set to 0.5.

virtual void vtk3DWidget::SetHandleSize ( double ) [virtual]

Set/Get the factor that controls the size of the handles that appear as part of the widget. These handles (like spheres, etc.) are used to manipulate the widget, and are sized as a fraction of the screen diagonal.

virtual double vtk3DWidget::GetHandleSize ( ) [virtual]

Set/Get the factor that controls the size of the handles that appear as part of the widget. These handles (like spheres, etc.) are used to manipulate the widget, and are sized as a fraction of the screen diagonal.