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| 54 | <H2><A NAME="SECTION005510000000000000000"></A><A NAME="aeserver-objects"></A> |
| 55 | <BR> |
| 56 | 3.5.1 AEServer Objects |
| 57 | </H2> |
| 58 | |
| 59 | <P> |
| 60 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 61 | <td><nobr><b><tt id='l2h-179' xml:id='l2h-179' class="method">installaehandler</tt></b>(</nobr></td> |
| 62 | <td><var>classe, type, callback</var>)</td></tr></table></dt> |
| 63 | <dd> |
| 64 | Installs an AppleEvent handler. <var>classe</var> and <var>type</var> are the |
| 65 | four-character OSA Class and Type designators, <code>'****'</code> wildcards |
| 66 | are allowed. When a matching AppleEvent is received the parameters are |
| 67 | decoded and your callback is invoked. |
| 68 | </dl> |
| 69 | |
| 70 | <P> |
| 71 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 72 | <td><nobr><b><tt id='l2h-180' xml:id='l2h-180' class="method">callback</tt></b>(</nobr></td> |
| 73 | <td><var>_object, **kwargs</var>)</td></tr></table></dt> |
| 74 | <dd> |
| 75 | Your callback is called with the OSA Direct Object as first positional |
| 76 | parameter. The other parameters are passed as keyword arguments, with |
| 77 | the 4-character designator as name. Three extra keyword parameters are |
| 78 | passed: <code>_class</code> and <code>_type</code> are the Class and Type |
| 79 | designators and <code>_attributes</code> is a dictionary with the AppleEvent |
| 80 | attributes. |
| 81 | |
| 82 | <P> |
| 83 | The return value of your method is packed with |
| 84 | <tt class="function">aetools.packevent()</tt> and sent as reply. |
| 85 | </dl> |
| 86 | |
| 87 | <P> |
| 88 | Note that there are some serious problems with the current |
| 89 | design. AppleEvents which have non-identifier 4-character designators |
| 90 | for arguments are not implementable, and it is not possible to return |
| 91 | an error to the originator. This will be addressed in a future |
| 92 | release. |
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| 130 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> |
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