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<title>3.5.1 AEServer Objects
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<H2><A NAME=
"SECTION005510000000000000000"></A><A NAME=
"aeserver-objects"></A>
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<td><nobr><b><tt id='l2h-
179' xml:id='l2h-
179'
class=
"method">installaehandler
</tt></b>(
</nobr></td>
<td><var>classe, type, callback
</var>)
</td></tr></table></dt>
Installs an AppleEvent handler.
<var>classe
</var> and
<var>type
</var> are the
four-character OSA Class and Type designators,
<code>'****'
</code> wildcards
are allowed. When a matching AppleEvent is received the parameters are
decoded and your callback is invoked.
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<td><nobr><b><tt id='l2h-
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180'
class=
"method">callback
</tt></b>(
</nobr></td>
<td><var>_object, **kwargs
</var>)
</td></tr></table></dt>
Your callback is called with the OSA Direct Object as first positional
parameter. The other parameters are passed as keyword arguments, with
the
4-character designator as name. Three extra keyword parameters are
passed:
<code>_class
</code> and
<code>_type
</code> are the Class and Type
designators and
<code>_attributes
</code> is a dictionary with the AppleEvent
The return value of your method is packed with
<tt class=
"function">aetools.packevent()
</tt> and sent as reply.
Note that there are some serious problems with the current
design. AppleEvents which have non-identifier
4-character designators
for arguments are not implementable, and it is not possible to return
an error to the originator. This will be addressed in a future
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<span class=
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2.4.2, documentation updated on
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2005.
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