[gmpi] Re: 3.11 topic: Inter-parameter linkages
- From: Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Tue, 13 Apr 2004 15:25:34 -0400
>> serialized data is wrapped in an object called a Memento. Then the
>> object can be restored using the SetMemento method. So undo can be
>> achieved without the host knowing anything about the data, which is opaque.
>> It would work, but it requires the params to be opaque if there are
>> any of these special cases that we are discussing. When I suggested tha
>t
>> earlier, people were not happy.
>
>Ahh, right. Well, if parameters are not opaque, then there's no need to
>serialize the entire state, is there?
my favorite implementation of the Memento pattern doesn't involve
passing data to and fro.
instead, the Memento is actually a closure that can be invoked by the
plugin. whether or not it contains any actual parameter data or merely
a pointer to some private state held by the plugin is an invisible
detail.
how would such a scheme require that parameters be opaque?
--p
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