vtkAxesTransformWidget Class Reference

#include <vtkAxesTransformWidget.h>

Inheritance diagram for vtkAxesTransformWidget:

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Collaboration diagram for vtkAxesTransformWidget:

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List of all members.

Detailed Description

3D widget for performing 3D transformations around an axes

This 3D widget defines an axes which is used to guide transformation. The widget can translate, scale, and rotate around one of the three coordinate axes. The widget consists of a handle at the origin (used for translation), three axes (around which rotations occur), and three end arrows (or cones depending on the representation) that can be stretched to scale an object. Optionally a text label can be used to indicate the amount of the transformation.

To use this widget, you generally pair it with a vtkAxesTransformRepresentation (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 the origin handle is selected:
   LeftButtonPressEvent - activate the associated handle widget
   LeftButtonReleaseEvent - release the handle widget associated with the point
   MouseMoveEvent - move the handle and hence the origin and the widget
 If one of the lines is selected:
   LeftButtonPressEvent - activate rotation by selecting one of the three axes.
   LeftButtonReleaseEvent - end rotation
   MouseMoveEvent - moving along the selected axis causes rotation to occur.
 If one of the arrows/cones is selected:
   LeftButtonPressEvent - activate scaling by selecting the ends of one of the three axes.
   LeftButtonReleaseEvent - end scaling
   MouseMoveEvent - moving along the selected axis causes scaling to occur.

Event Bindings:

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

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

Event Bindings:

In turn, when these widget events are processed, the vtkAxesTransformWidget 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)

Warning:: Note that the widget can be picked even when it is "behind" other actors. This is an intended feature and not a bug.
This class, and vtkAxesTransformRepresentation, are next generation VTK widgets.

See also:: vtkAxesTransformRepresentation vtkAffineWidget vtkBoxWidget2

Events:: vtkCommand::EndInteractionEvent vtkCommand::InteractionEvent vtkCommand::MouseMoveEvent vtkCommand::LeftButtonPressEvent vtkCommand::StartInteractionEvent vtkCommand::LeftButtonReleaseEvent

Tests:: vtkAxesTransformWidget (Tests)

Definition at line 95 of file vtkAxesTransformWidget.h.


typedef vtkAbstractWidget	Superclass
static int	IsTypeOf (const char *type)
static vtkAxesTransformWidget *	SafeDownCast (vtkObject *o)
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
Public Member Functions
virtual void	SetEnabled (int enabling)
void	CreateDefaultRepresentation ()
virtual void	SetProcessEvents (int)

void	SetRepresentation (vtkAxesTransformRepresentation *r)

vtkAxesTransformRepresentation *	GetLineRepresentation ()
Static Public Member Functions
static vtkAxesTransformWidget *	New ()
Protected Types
enum	_WidgetState { Start = 0, Active }
Protected Member Functions
	vtkAxesTransformWidget ()
	~vtkAxesTransformWidget ()
Static Protected Member Functions
static void	SelectAction (vtkAbstractWidget *)
static void	EndSelectAction (vtkAbstractWidget *)
static void	MoveAction (vtkAbstractWidget *)
Protected Attributes
int	WidgetState
int	CurrentHandle
vtkHandleWidget *	OriginWidget
vtkHandleWidget *	SelectionWidget

Member Typedef Documentation

typedef vtkAbstractWidget vtkAxesTransformWidget::Superclass

Standard vtkObject methods

Reimplemented from vtkAbstractWidget.

Definition at line 103 of file vtkAxesTransformWidget.h.

Member Enumeration Documentation

enum vtkAxesTransformWidget::_WidgetState [protected]

Enumerator:

Start
Active

Definition at line 137 of file vtkAxesTransformWidget.h.

Constructor & Destructor Documentation

vtkAxesTransformWidget::vtkAxesTransformWidget ( ) [protected]

vtkAxesTransformWidget::~vtkAxesTransformWidget ( ) [protected]

Member Function Documentation

static vtkAxesTransformWidget* vtkAxesTransformWidget::New ( ) [static]

Instantiate the object.

Reimplemented from vtkObject.

virtual const char* vtkAxesTransformWidget::GetClassName ( ) [virtual]

Standard vtkObject methods

Reimplemented from vtkAbstractWidget.

static int vtkAxesTransformWidget::IsTypeOf ( const char * type ) [static]

Standard vtkObject methods

Reimplemented from vtkAbstractWidget.

virtual int vtkAxesTransformWidget::IsA ( const char * type ) [virtual]

Standard vtkObject methods

Reimplemented from vtkAbstractWidget.

static vtkAxesTransformWidget* vtkAxesTransformWidget::SafeDownCast ( vtkObject * o ) [static]

Standard vtkObject methods

Reimplemented from vtkAbstractWidget.

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

Standard vtkObject methods

Reimplemented from vtkAbstractWidget.

virtual void vtkAxesTransformWidget::SetEnabled ( int enabling ) [virtual]

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

Reimplemented from vtkAbstractWidget.

void vtkAxesTransformWidget::SetRepresentation ( vtkAxesTransformRepresentation * 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 115 of file vtkAxesTransformWidget.h.

vtkAxesTransformRepresentation* vtkAxesTransformWidget::GetLineRepresentation ( ) [inline]

Return the representation as a vtkAxesTransformRepresentation.

Definition at line 121 of file vtkAxesTransformWidget.h.

void vtkAxesTransformWidget::CreateDefaultRepresentation ( ) [virtual]

Create the default widget representation if one is not set.

Implements vtkAbstractWidget.

virtual void vtkAxesTransformWidget::SetProcessEvents ( int ) [virtual]

Methods to change the whether the widget responds to interaction. Overridden to pass the state to component widgets.

Reimplemented from vtkAbstractWidget.

static void vtkAxesTransformWidget::SelectAction ( vtkAbstractWidget * ) [static, protected]