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Usage
vtkObjectBase is the base class for all reference counted
classes in the VTK. These classes include vtkCommand
classes, vtkInformationKey classes, and vtkObject classes.
vtkObjectBase 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.
Constructor and destructor of the subclasses of
vtkObjectBase should be protected, so that only New() and
UnRegister() actually call them. Debug leaks can be used to
see if there are any objects left with nonzero reference
count.
To create an instance of class vtkObjectBase, simply invoke
its constructor as follows
obj = vtkObjectBase
Methods
The class vtkObjectBase 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 vtkObjectBase class.
* string = obj.GetClassName () const - Return the class name
as a string. This method is defined in all subclasses of
vtkObjectBase with the vtkTypeRevisionMacro found in
vtkSetGet.h.
* int = obj.IsA (string name) - 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
vtkTypeRevisionMacro found in vtkSetGet.h.
* obj.Delete () - Delete a VTK object. This method should
always be used to delete an object when the New() method
was used to create it. Using the C++ delete method will
not work with reference counting.
* obj.FastDelete () - Delete a reference to this object.
This version will not invoke garbage collection and can
potentially leak the object if it is part of a reference
loop. Use this method only when it is known that the
object has another reference and would not be collected if
a full garbage collection check were done.
* obj.Register (vtkObjectBase o) - Increase the reference
count (mark as used by another object).
* obj.UnRegister (vtkObjectBase o) - Decrease the reference
count (release by another object). This has the same
effect as invoking Delete() (i.e., it reduces the
reference count by 1).
* int = obj.GetReferenceCount () - Sets the reference count.
(This is very dangerous, use with care.)
* obj.SetReferenceCount (int ) - Sets the reference count.
(This is very dangerous, use with care.)
* 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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