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Usage
vtkObject is the base class for most objects in the
visualization toolkit. vtkObject provides methods for
tracking modification time, debugging, printing, and event
callbacks. Most objects created within the VTK framework
should be a subclass of vtkObject or one of its children.
The few exceptions tend to be very small helper classes that
usually never get instantiated or situations where multiple
inheritance gets in the way. vtkObject also performs
reference counting: objects that are reference counted exist
as long as another object uses them. Once the last reference
to a reference counted object is removed, the object will
spontaneously destruct.
To create an instance of class vtkObject, simply invoke its
constructor as follows
obj = vtkObject
Methods
The class vtkObject 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 vtkObject class.
* string = obj.GetClassName ()
* int = obj.IsA (string name)
* vtkObject = obj.NewInstance ()
* vtkObject = obj.SafeDownCast (vtkObject o)
* obj.DebugOn () - Turn debugging output on.
* obj.DebugOff () - Turn debugging output off.
* char = obj.GetDebug () - Get the value of the debug flag.
* obj.SetDebug (char debugFlag) - Set the value of the debug
flag. A non-zero value turns debugging on.
* obj.Modified () - Update the modification time for this
object. Many filters rely on the modification time to
determine if they need to recompute their data. The
modification time is a unique monotonically increasing
unsigned long integer.
* long = obj.GetMTime () - Return this object's modified
time.
* obj.RemoveObserver (long tag) - Allow people to add/
remove/invoke observers (callbacks) to any VTK object.
This is an implementation of the subject/observer design
pattern. An observer is added by specifying an event to
respond to and a vtkCommand to execute. It returns an
unsigned long tag which can be used later to remove the
event or retrieve the command. When events are invoked,
the observers are called in the order they were added. If
a priority value is specified, then the higher priority
commands are called first. A command may set an abort flag
to stop processing of the event. (See vtkCommand.h for
more information.)
* obj.RemoveObservers (long event) - Allow people to add/
remove/invoke observers (callbacks) to any VTK object.
This is an implementation of the subject/observer design
pattern. An observer is added by specifying an event to
respond to and a vtkCommand to execute. It returns an
unsigned long tag which can be used later to remove the
event or retrieve the command. When events are invoked,
the observers are called in the order they were added. If
a priority value is specified, then the higher priority
commands are called first. A command may set an abort flag
to stop processing of the event. (See vtkCommand.h for
more information.)
* obj.RemoveObservers (string event) - Allow people to add/
remove/invoke observers (callbacks) to any VTK object.
This is an implementation of the subject/observer design
pattern. An observer is added by specifying an event to
respond to and a vtkCommand to execute. It returns an
unsigned long tag which can be used later to remove the
event or retrieve the command. When events are invoked,
the observers are called in the order they were added. If
a priority value is specified, then the higher priority
commands are called first. A command may set an abort flag
to stop processing of the event. (See vtkCommand.h for
more information.)
* obj.RemoveAllObservers () - Allow people to add/remove/
invoke observers (callbacks) to any VTK object. This is an
implementation of the subject/observer design pattern. An
observer is added by specifying an event to respond to and
a vtkCommand to execute. It returns an unsigned long tag
which can be used later to remove the event or retrieve
the command. When events are invoked, the observers are
called in the order they were added. If a priority value
is specified, then the higher priority commands are called
first. A command may set an abort flag to stop processing
of the event. (See vtkCommand.h for more information.)
* int = obj.HasObserver (long event) - Allow people to add/
remove/invoke observers (callbacks) to any VTK object.
This is an implementation of the subject/observer design
pattern. An observer is added by specifying an event to
respond to and a vtkCommand to execute. It returns an
unsigned long tag which can be used later to remove the
event or retrieve the command. When events are invoked,
the observers are called in the order they were added. If
a priority value is specified, then the higher priority
commands are called first. A command may set an abort flag
to stop processing of the event. (See vtkCommand.h for
more information.)
* int = obj.HasObserver (string event) - Allow people to
add/remove/invoke observers (callbacks) to any VTK object.
This is an implementation of the subject/observer design
pattern. An observer is added by specifying an event to
respond to and a vtkCommand to execute. It returns an
unsigned long tag which can be used later to remove the
event or retrieve the command. When events are invoked,
the observers are called in the order they were added. If
a priority value is specified, then the higher priority
commands are called first. A command may set an abort flag
to stop processing of the event. (See vtkCommand.h for
more information.)
* int = obj.InvokeEvent (long event)
* int = obj.InvokeEvent (string event)
* FreeMat_Documentation
* Visualization_Toolkit_Common_Classes
* Generated on Thu Jul 25 2013 17:18:30 for FreeMat by
doxygen_ 1.8.1.1
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