invoke a vtkTimerEvent when hovering More...

#include <vtkHoverWidget.h>

Inheritance diagram for vtkHoverWidget:

Collaboration diagram for vtkHoverWidget:

Public Types
typedef vtkAbstractWidget	Superclass
	Standard methods for a VTK class. More...

Public Types inherited from vtkAbstractWidget
typedef vtkInteractorObserver	Superclass
	Standard macros implementing standard VTK methods. More...

Public Types inherited from vtkInteractorObserver
typedef vtkObject	Superclass

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

vtkHoverWidget *	NewInstance () const

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

virtual void	SetTimerDuration (int)
	Specify the hovering interval (in milliseconds). More...

virtual int	GetTimerDuration ()

void	SetEnabled (int) override
	The method for activating and deactivating this widget. More...

void	CreateDefaultRepresentation () override
	A default representation, of which there is none, is created. More...

Public Member Functions inherited from vtkAbstractWidget
vtkAbstractWidget *	NewInstance () const

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

virtual vtkTypeBool	GetProcessEvents ()

virtual void	ProcessEventsOn ()

virtual void	ProcessEventsOff ()

vtkWidgetEventTranslator *	GetEventTranslator ()
	Get the event translator. More...

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

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

virtual vtkAbstractWidget *	GetParent ()

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

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

virtual vtkTypeBool	GetManagesCursor ()

virtual void	ManagesCursorOn ()

virtual void	ManagesCursorOff ()

void	SetPriority (float) override
	Override the superclass method. More...

Public Member Functions inherited from vtkInteractorObserver
vtkInteractorObserver *	NewInstance () const

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

int	GetEnabled ()

void	EnabledOn ()

void	EnabledOff ()

void	On ()

void	Off ()

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

virtual vtkRenderWindowInteractor *	GetInteractor ()

virtual float	GetPriority ()

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

virtual void	PickingManagedOff ()

virtual void	SetPickingManaged (bool managed)

virtual bool	GetPickingManaged ()

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

virtual vtkTypeBool	GetKeyPressActivation ()

virtual void	KeyPressActivationOn ()

virtual void	KeyPressActivationOff ()

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

virtual char	GetKeyPressActivationValue ()

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

virtual void	SetDefaultRenderer (vtkRenderer *)

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

virtual void	SetCurrentRenderer (vtkRenderer *)

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

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

void	ReleaseFocus ()

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

virtual void	DebugOn ()
	Turn debugging output on. More...

virtual void	DebugOff ()
	Turn debugging output off. More...

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

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

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

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

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

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)

vtkCommand *	GetCommand (unsigned long tag)

void	RemoveObserver (vtkCommand *)

void	RemoveObservers (unsigned long event, vtkCommand *)

void	RemoveObservers (const char event, vtkCommand )

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)

vtkTypeBool	HasObserver (const char event, vtkCommand )

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)

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. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)

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. More...

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

int	InvokeEvent (const char event, void callData)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

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

virtual void	Delete ()
	Delete a VTK object. More...

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

void	InitializeObjectBase ()

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

virtual void	PrintHeader (ostream &os, vtkIndent indent)

virtual void	PrintTrailer (ostream &os, vtkIndent indent)

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

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

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

void	SetReferenceCount (int)
	Sets the reference count. More...

void	PrintRevisions (ostream &)
	Legacy. More...

Static Public Member Functions
static vtkHoverWidget *	New ()
	Instantiate this class. More...

static vtkTypeBool	IsTypeOf (const char *type)

static vtkHoverWidget *	SafeDownCast (vtkObjectBase *o)

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

static vtkAbstractWidget *	SafeDownCast (vtkObjectBase *o)

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. More...

static void	ComputeWorldToDisplay (vtkRenderer *ren, double x, double y, double z, double displayPt[3])

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. More...

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

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

static void	GlobalWarningDisplayOn ()

static void	GlobalWarningDisplayOff ()

static int	GetGlobalWarningDisplay ()

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. More...

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

Protected Types
enum	{ Start = 0, Timing, TimedOut }

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkHoverWidget ()

	~vtkHoverWidget () override

virtual int	SubclassHoverAction ()

virtual int	SubclassEndHoverAction ()

virtual int	SubclassSelectAction ()

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
	vtkInteractorObserver ()

	~vtkInteractorObserver () override

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

virtual void	EndInteraction ()

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

void	ComputeWorldToDisplay (double x, double y, double z, double displayPt[3])

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

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

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

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. More...

int	RequestCursorShape (int requestedShape)

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. More...

void	InternalReleaseFocus ()

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Static Protected Member Functions
static void	MoveAction (vtkAbstractWidget *)

static void	HoverAction (vtkAbstractWidget *)

static void	SelectAction (vtkAbstractWidget *)

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. More...

Protected Attributes
int	WidgetState

int	TimerId
	Helper methods for creating and destroying timers. More...

int	TimerDuration

Protected Attributes inherited from vtkAbstractWidget
vtkWidgetRepresentation *	WidgetRep

vtkTypeBool	ManagesCursor

vtkWidgetEventTranslator *	EventTranslator

vtkWidgetCallbackMapper *	CallbackMapper

vtkAbstractWidget *	Parent

void *	CallData

vtkTypeBool	ProcessEvents

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

Detailed Description

invoke a vtkTimerEvent when hovering

The vtkHoverWidget is used to invoke an event when hovering in a render window. Hovering occurs when mouse motion (in the render window) does not occur for a specified amount of time (i.e., TimerDuration). This class can be used as is (by observing TimerEvents) or for class derivation for those classes wishing to do more with the hover event.

To use this widget, specify an instance of vtkHoverWidget and specify the time (in milliseconds) defining the hover period. Unlike most widgets, this widget does not require a representation (although subclasses like vtkBalloonWidget do require a representation).

Event Bindings:

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

  MouseMoveEvent - manages a timer used to determine whether the mouse
                   is hovering.
  TimerEvent - when the time between events (e.g., mouse move), then a
               timer event is invoked.
  KeyPressEvent - when the "Enter" key is pressed after the balloon appears,
                  a callback is activated (e.g., WidgetActivateEvent).

Event Bindings:

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

  vtkWidgetEvent::Move -- start (or reset) the timer
  vtkWidgetEvent::TimedOut -- when enough time is elapsed between defined
                              VTK events the hover event is invoked.
  vtkWidgetEvent::SelectAction -- activate any callbacks associated
                                  with the balloon.

Event Bindings:

This widget invokes the following VTK events on itself when the widget determines that it is hovering. Note that observers of this widget can listen for these events and take appropriate action.

  vtkCommand::TimerEvent (when hovering is determined to occur)
  vtkCommand::EndInteractionEvent (after a hover has occurred and the
                                   mouse begins moving again).
  vtkCommand::WidgetActivateEvent (when the balloon is selected with a
                                   keypress).

See also: vtkAbstractWidget

Definition at line 76 of file vtkHoverWidget.h.

Member Typedef Documentation

◆ Superclass

typedef vtkAbstractWidget vtkHoverWidget::Superclass

Standard methods for a VTK class.

Definition at line 88 of file vtkHoverWidget.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

protected

Enumerator
Start
Timing
TimedOut

Definition at line 121 of file vtkHoverWidget.h.

Constructor & Destructor Documentation

◆ vtkHoverWidget()

vtkHoverWidget::vtkHoverWidget ( )

protected

◆ ~vtkHoverWidget()

vtkHoverWidget::~vtkHoverWidget ( )

overrideprotected

Member Function Documentation

◆ New()

static vtkHoverWidget* vtkHoverWidget::New ( )

static

Instantiate this class.

◆ IsTypeOf()

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

static

◆ IsA()

virtual vtkTypeBool vtkHoverWidget::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 vtkAbstractWidget.

Reimplemented in vtkBalloonWidget.

◆ SafeDownCast()

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

static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkHoverWidget::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkAbstractWidget.

Reimplemented in vtkBalloonWidget.

◆ NewInstance()

vtkHoverWidget* vtkHoverWidget::NewInstance ( ) const

◆ PrintSelf()

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

overridevirtual

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 vtkAbstractWidget.

◆ SetTimerDuration()

virtual void vtkHoverWidget::SetTimerDuration ( int )

virtual

Specify the hovering interval (in milliseconds).

If after moving the mouse the pointer stays over a vtkProp for this duration, then a vtkTimerEvent::TimerEvent is invoked.

◆ GetTimerDuration()

virtual int vtkHoverWidget::GetTimerDuration ( )

virtual

◆ SetEnabled()

void vtkHoverWidget::SetEnabled ( int )

overridevirtual

The method for activating and deactivating this widget.

This method must be overridden because it performs special timer-related operations.

Reimplemented from vtkAbstractWidget.

◆ CreateDefaultRepresentation()

void vtkHoverWidget::CreateDefaultRepresentation ( )

inlineoverridevirtual

A default representation, of which there is none, is created.

Note that the superclasses vtkAbstractWidget::GetRepresentation() method returns nullptr.

Implements vtkAbstractWidget.

Definition at line 113 of file vtkHoverWidget.h.

◆ MoveAction()

static void vtkHoverWidget::MoveAction ( vtkAbstractWidget * )

staticprotected

◆ HoverAction()

static void vtkHoverWidget::HoverAction ( vtkAbstractWidget * )

staticprotected

◆ SelectAction()

static void vtkHoverWidget::SelectAction ( vtkAbstractWidget * )

staticprotected

◆ SubclassHoverAction()

virtual int vtkHoverWidget::SubclassHoverAction ( )

inlineprotectedvirtual

Reimplemented in vtkBalloonWidget.

Definition at line 137 of file vtkHoverWidget.h.

◆ SubclassEndHoverAction()

virtual int vtkHoverWidget::SubclassEndHoverAction ( )

inlineprotectedvirtual

Reimplemented in vtkBalloonWidget.

Definition at line 138 of file vtkHoverWidget.h.

◆ SubclassSelectAction()

virtual int vtkHoverWidget::SubclassSelectAction ( )

inlineprotectedvirtual

Definition at line 139 of file vtkHoverWidget.h.

Member Data Documentation

◆ WidgetState

int vtkHoverWidget::WidgetState

protected

Definition at line 128 of file vtkHoverWidget.h.

◆ TimerId

int vtkHoverWidget::TimerId

protected

Helper methods for creating and destroying timers.

Definition at line 145 of file vtkHoverWidget.h.

◆ TimerDuration

int vtkHoverWidget::TimerDuration

protected

Definition at line 146 of file vtkHoverWidget.h.

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

dox/Interaction/Widgets/vtkHoverWidget.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

◆ Superclass

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ vtkHoverWidget()

◆ ~vtkHoverWidget()

Member Function Documentation

◆ New()

◆ IsTypeOf()

◆ IsA()

◆ SafeDownCast()

◆ NewInstanceInternal()

◆ NewInstance()

◆ PrintSelf()

◆ SetTimerDuration()

◆ GetTimerDuration()

◆ SetEnabled()

◆ CreateDefaultRepresentation()

◆ MoveAction()

◆ HoverAction()

◆ SelectAction()

◆ SubclassHoverAction()

◆ SubclassEndHoverAction()

◆ SubclassSelectAction()

Member Data Documentation

◆ WidgetState

◆ TimerId

◆ TimerDuration