.. include:: headings.inc



.. _Trackable:

==========================================================================================================================================
|phoenix_title|  **Trackable**
==========================================================================================================================================

Add-on base class for a trackable object.          

This class maintains an internal linked list of classes of type TrackerNode and calls OnObjectDestroy() on them if this object is destroyed. The most common usage is by using the `WeakRef`  class template which automates this. This class has no public API. Its only use is by deriving another class from it to make it trackable. 











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|class_hierarchy| Inheritance Diagram
=====================================

Inheritance diagram for class **Trackable**

.. raw:: html

   <p class="graphviz">
   <img src="_static/images/inheritance/Trackable_inheritance.png" alt="Inheritance diagram of Trackable" usemap="#dummy" class="inheritance"/>
   <map id="dummy" name="dummy"> <area shape="rect" id="node1" href="Trackable.html" title="Add-on base class for a trackable object." alt="" coords="5,5,99,35"/> </map> 
   </p>

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|sub_classes| Known Subclasses
==============================

:ref:`EvtHandler`

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|api| Class API
===============
   

.. class:: Trackable(object)

   Add-on base class for a trackable object.