.. include:: headings.inc



.. _LogInterposer:

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|phoenix_title|  **LogInterposer**
==========================================================================================================================================

A special version of :ref:`LogChain`  which uses itself as the new log target.          

It forwards log messages to the previously installed one in addition to processing them itself. 

Unlike :ref:`LogChain`  which is usually used directly as is, this class must be derived from to implement `Log.DoLog` and/or `Log.DoLogString` methods. 

:ref:`LogInterposer`  destroys the previous log target in its destructor. If you don't want this to happen, use :ref:`LogInterposerTemp`  instead. 









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|class_hierarchy| Inheritance Diagram
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Inheritance diagram for class **LogInterposer**

.. raw:: html

   <p class="graphviz">
   <img src="_static/images/inheritance/LogInterposer_inheritance.png" alt="Inheritance diagram of LogInterposer" usemap="#dummy" class="inheritance"/>
   <map id="dummy" name="dummy"> <area shape="rect" id="node1" href="Log.html" title="Log  class defines the interface for the `log targets`  used by wxWidgets logging functions as explained in the Log Classes Overview <log classes overview>." alt="" coords="5,5,77,35"/> <area shape="rect" id="node3" href="LogChain.html" title="This simple class allows you to chain log sinks, that is to install a new sink but keep passing log messages to the old one instead of replacing it completely as Log.SetActiveTarget   does." alt="" coords="127,5,217,35"/> <area shape="rect" id="node2" href="LogInterposer.html" title="A special version of LogChain  which uses itself as the new log target." alt="" coords="267,5,389,35"/> </map> 
   </p>

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

:ref:`LogWindow`

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|method_summary| Methods Summary
================================

================================================================================ ================================================================================
:meth:`~LogInterposer.__init__`                                                  The default constructor installs this object as the current active log target.
================================================================================ ================================================================================


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

.. class:: LogInterposer(LogChain)

   A special version of LogChain which uses itself as the new log target.
   
   **Possible constructors**::

       LogInterposer()
       



   .. method:: __init__(self)

      The default constructor installs this object as the current active log target.