manage contention for cursors and other resources More...

#include <vtkObserverMediator.h>

Inheritance diagram for vtkObserverMediator:

Collaboration diagram for vtkObserverMediator:

Public Member Functions
int	RequestCursorShape (vtkInteractorObserver *, int cursorShape)
void	RemoveAllCursorShapeRequests (vtkInteractorObserver *)

void	SetInteractor (vtkRenderWindowInteractor *iren)
virtual vtkRenderWindowInteractor *	GetInteractor ()
Static Public Member Functions
static vtkObserverMediator *	New ()
Protected Member Functions
	vtkObserverMediator ()
	~vtkObserverMediator ()
Protected Attributes
vtkRenderWindowInteractor *	Interactor
vtkObserverMap *	ObserverMap
vtkInteractorObserver *	CurrentObserver
int	CurrentCursorShape
typedef vtkObject	Superclass
static int	IsTypeOf (const char *type)
static vtkObserverMediator *	SafeDownCast (vtkObjectBase *o)
virtual int	IsA (const char *type)
vtkObserverMediator *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
virtual vtkObjectBase *	NewInstanceInternal () const

Detailed Description

manage contention for cursors and other resources

The vtkObserverMediator is a helper class that manages requests for cursor changes from multiple interactor observers (e.g. widgets). It keeps a list of widgets (and their priorities) and their current requests for cursor shape. It then satisfies requests based on widget priority and the relative importance of the request (e.g., a lower priority widget requesting a particular cursor shape will overrule a higher priority widget requesting a default shape).

See also:: vtkAbstractWidget vtkWidgetRepresentation

Definition at line 41 of file vtkObserverMediator.h.

Member Typedef Documentation

typedef vtkObject vtkObserverMediator::Superclass

Standard macros.

Reimplemented from vtkObject.

Definition at line 49 of file vtkObserverMediator.h.

Constructor & Destructor Documentation

vtkObserverMediator::vtkObserverMediator ( ) [protected]

vtkObserverMediator::~vtkObserverMediator ( ) [protected]

Member Function Documentation

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

Instantiate the class.

Reimplemented from vtkObject.

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

Standard macros.

Reimplemented from vtkObject.

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

Standard macros.

Reimplemented from vtkObject.

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

Standard macros.

Reimplemented from vtkObject.

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

Standard macros.

Reimplemented from vtkObject.

vtkObserverMediator* vtkObserverMediator::NewInstance ( ) const

Standard macros.

Reimplemented from vtkObject.

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

Standard macros.

Reimplemented from vtkObject.

void vtkObserverMediator::SetInteractor ( vtkRenderWindowInteractor * iren )

Specify the instance of vtkRenderWindow whose cursor shape is to be managed.

virtual vtkRenderWindowInteractor* vtkObserverMediator::GetInteractor ( ) [virtual]

Specify the instance of vtkRenderWindow whose cursor shape is to be managed.

int vtkObserverMediator::RequestCursorShape	(	vtkInteractorObserver *	,
		int	cursorShape
	)

Method used to request a cursor shape. Note that the shape is specified using one of the integral values determined in vtkRenderWindow.h. The method returns a non-zero value if the shape was successfully changed.

void vtkObserverMediator::RemoveAllCursorShapeRequests ( vtkInteractorObserver * )

Remove all requests for cursor shape from a given interactor.