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Usage
vtkInteractorObserver is an abstract superclass for
subclasses that observe events invoked by
vtkRenderWindowInteractor. These subclasses are typically
things like 3D widgets; objects that interact with actors in
the scene, or interactively probe the scene for information.
vtkInteractorObserver defines the method SetInteractor() and
enables and disables the processing of events by the
vtkInteractorObserver. Use the methods EnabledOn() or
SetEnabled(1) to turn on the interactor observer, and the
methods EnabledOff() or SetEnabled(0) to turn off the
interactor. Initial value is 0.
To support interactive manipulation of objects, this class
(and subclasses) invoke the events StartInteractionEvent,
InteractionEvent, and EndInteractionEvent. These events are
invoked when the vtkInteractorObserver 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 data or update a
pipeline (InteractionEvent), and set the desired frame rate
back to normal values (EndInteractionEvent). Two other
events, EnableEvent and DisableEvent, are invoked when the
interactor observer is enabled or disabled.
To create an instance of class vtkInteractorObserver, simply
invoke its constructor as follows
obj = vtkInteractorObserver
Methods
The class vtkInteractorObserver has several methods that can
be used. They are listed below. Note that the documentation
is translated automatically from the VTK sources, and may
not be completely intelligible. When in doubt, consult the
VTK website. In the methods listed below, obj is an instance
of the vtkInteractorObserver class.
* string = obj.GetClassName ()
* int = obj.IsA (string name)
* vtkInteractorObserver = obj.NewInstance ()
* vtkInteractorObserver = obj.SafeDownCast (vtkObject o)
* obj.SetEnabled (int ) - Methods for turning the interactor
observer on and off, and determining its state. All
subclasses must provide the SetEnabled() method. Enabling
a vtkInteractorObserver has the side effect of adding
observers; disabling it removes the observers. Prior to
enabling the vtkInteractorObserver you must set the render
window interactor (via SetInteractor()). Initial value is
0.
* int = obj.GetEnabled () - Methods for turning the
interactor observer on and off, and determining its state.
All subclasses must provide the SetEnabled() method.
Enabling a vtkInteractorObserver has the side effect of
adding observers; disabling it removes the observers.
Prior to enabling the vtkInteractorObserver you must set
the render window interactor (via SetInteractor()).
Initial value is 0.
* obj.EnabledOn () - Methods for turning the interactor
observer on and off, and determining its state. All
subclasses must provide the SetEnabled() method. Enabling
a vtkInteractorObserver has the side effect of adding
observers; disabling it removes the observers. Prior to
enabling the vtkInteractorObserver you must set the render
window interactor (via SetInteractor()). Initial value is
0.
* obj.EnabledOff () - Methods for turning the interactor
observer on and off, and determining its state. All
subclasses must provide the SetEnabled() method. Enabling
a vtkInteractorObserver has the side effect of adding
observers; disabling it removes the observers. Prior to
enabling the vtkInteractorObserver you must set the render
window interactor (via SetInteractor()). Initial value is
0.
* obj.On () - Methods for turning the interactor observer on
and off, and determining its state. All subclasses must
provide the SetEnabled() method. Enabling a
vtkInteractorObserver has the side effect of adding
observers; disabling it removes the observers. Prior to
enabling the vtkInteractorObserver you must set the render
window interactor (via SetInteractor()). Initial value is
0.
* obj.Off () - This method is used to associate the widget
with the render window interactor. Observers of the
appropriate events invoked in the render window interactor
are set up as a result of this method invocation. The
SetInteractor() method must be invoked prior to enabling
the vtkInteractorObserver.
* obj.SetInteractor (vtkRenderWindowInteractor iren) - This
method is used to associate the widget with the render
window interactor. Observers of the appropriate events
invoked in the render window interactor are set up as a
result of this method invocation. The SetInteractor()
method must be invoked prior to enabling the
vtkInteractorObserver.
* vtkRenderWindowInteractor = obj.GetInteractor () - This
method is used to associate the widget with the render
window interactor. Observers of the appropriate events
invoked in the render window interactor are set up as a
result of this method invocation. The SetInteractor()
method must be invoked prior to enabling the
vtkInteractorObserver.
* obj.SetPriority (float ) - Set/Get the priority at which
events are processed. This is used when multiple
interactor observers are used simultaneously. The default
value is 0.0 (lowest priority.) Note that when multiple
interactor observer have the same priority, then the last
observer added will process the event first. (Note: once
the SetInteractor() method has been called, changing the
priority does not effect event processing. You will have
to SetInteractor(NULL), change priority, and then
SetInteractor(iren) to have the priority take effect.)
* float = obj.GetPriorityMinValue () - Set/Get the priority
at which events are processed. This is used when multiple
interactor observers are used simultaneously. The default
value is 0.0 (lowest priority.) Note that when multiple
interactor observer have the same priority, then the last
observer added will process the event first. (Note: once
the SetInteractor() method has been called, changing the
priority does not effect event processing. You will have
to SetInteractor(NULL), change priority, and then
SetInteractor(iren) to have the priority take effect.)
* float = obj.GetPriorityMaxValue () - Set/Get the priority
at which events are processed. This is used when multiple
interactor observers are used simultaneously. The default
value is 0.0 (lowest priority.) Note that when multiple
interactor observer have the same priority, then the last
observer added will process the event first. (Note: once
the SetInteractor() method has been called, changing the
priority does not effect event processing. You will have
to SetInteractor(NULL), change priority, and then
SetInteractor(iren) to have the priority take effect.)
* float = obj.GetPriority () - Set/Get the priority at which
events are processed. This is used when multiple
interactor observers are used simultaneously. The default
value is 0.0 (lowest priority.) Note that when multiple
interactor observer have the same priority, then the last
observer added will process the event first. (Note: once
the SetInteractor() method has been called, changing the
priority does not effect event processing. You will have
to SetInteractor(NULL), change priority, and then
SetInteractor(iren) to have the priority take effect.)
* obj.SetKeyPressActivation (int ) - Enable/Disable of the
use of a keypress to turn on and off the interactor
observer. (By default, the keypress is 'i' for "interactor
observer".) Set the KeyPressActivationValue to change
which key activates the widget.)
* int = obj.GetKeyPressActivation () - Enable/Disable of the
use of a keypress to turn on and off the interactor
observer. (By default, the keypress is 'i' for "interactor
observer".) Set the KeyPressActivationValue to change
which key activates the widget.)
* obj.KeyPressActivationOn () - Enable/Disable of the use of
a keypress to turn on and off the interactor observer. (By
default, the keypress is 'i' for "interactor observer".)
Set the KeyPressActivationValue to change which key
activates the widget.)
* obj.KeyPressActivationOff () - Enable/Disable of the use
of a keypress to turn on and off the interactor observer.
(By default, the keypress is 'i' for "interactor
observer".) Set the KeyPressActivationValue to change
which key activates the widget.)
* obj.SetKeyPressActivationValue (char ) - Specify which key
press value to use to activate the interactor observer (if
key press activation is enabled). By default, the key
press activation value is 'i'. Note: once the
SetInteractor() method is invoked, changing the key press
activation value will not affect the key press until
SetInteractor(NULL)/SetInteractor(iren) is called.
* char = obj.GetKeyPressActivationValue () - Specify which
key press value to use to activate the interactor observer
(if key press activation is enabled). By default, the key
press activation value is 'i'. Note: once the
SetInteractor() method is invoked, changing the key press
activation value will not affect the key press until
SetInteractor(NULL)/SetInteractor(iren) is called.
* vtkRenderer = obj.GetDefaultRenderer () - Set/Get the
default renderer to use when activating the interactor
observer. Normally when the widget is activated
(SetEnabled(1) or when keypress activation takes place),
the renderer over which the mouse pointer is positioned is
used. Alternatively, you can specify the renderer to bind
the interactor to when the interactor observer is
activated.
* obj.SetDefaultRenderer (vtkRenderer ) - Set/Get the
default renderer to use when activating the interactor
observer. Normally when the widget is activated
(SetEnabled(1) or when keypress activation takes place),
the renderer over which the mouse pointer is positioned is
used. Alternatively, you can specify the renderer to bind
the interactor to when the interactor observer is
activated.
* vtkRenderer = obj.GetCurrentRenderer () - Set/Get the
current renderer. Normally when the widget is activated
(SetEnabled(1) or when keypress activation takes place),
the renderer over which the mouse pointer is positioned is
used and assigned to this Ivar. Alternatively, you might
want to set the CurrentRenderer explicitly. WARNING: note
that if the DefaultRenderer Ivar is set (see above), it
will always override the parameter passed to
SetCurrentRenderer, unless it is NULL. (i.e.,
SetCurrentRenderer(foo) = SetCurrentRenderer
(DefaultRenderer).
* obj.SetCurrentRenderer (vtkRenderer ) - Set/Get the
current renderer. Normally when the widget is activated
(SetEnabled(1) or when keypress activation takes place),
the renderer over which the mouse pointer is positioned is
used and assigned to this Ivar. Alternatively, you might
want to set the CurrentRenderer explicitly. WARNING: note
that if the DefaultRenderer Ivar is set (see above), it
will always override the parameter passed to
SetCurrentRenderer, unless it is NULL. (i.e.,
SetCurrentRenderer(foo) = SetCurrentRenderer
(DefaultRenderer).
* obj.OnChar () - Sets up the keypress-i event.
* FreeMat_Documentation
* Visualization_Toolkit_Rendering_Classes
* Generated on Thu Jul 25 2013 17:18:35 for FreeMat by
doxygen_ 1.8.1.1
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