I want to combine Shane Hathaway's BTreeFolder product with ZPatterns to
create a "BTree folder w/ Customizer support".
This has obvious advantages over the current "Folder w/ Customizer
support" when you have a large number of DataSkin subobjects, both in
terms of performance, and in terms of user-interface.
The easiest way for me to do this would be to ask Phillip to make such a
thing a standard part of ZPatterns :-)
This is a little more difficult to do as a separate product, without
lots of cut-and-paste reuse. (At least, it seems that way at first
site.)
the problem is that the inheritance heirarchy for CustomizerFolder
(meta_type is "folder w/ customizer support") is like this:
PlugInBase Folder
^ ^
|_______________|
|
PlugInContainer
^
|
CustomizerFolder
Without seriously delving into the code, I think I'd have to reimplement
PlugInContainer.
Instead, why not make PlugInContainer a mix-in class, and have concrete
classes for PlugInFolder and PlugInBTreeFolder ?
Then, it is easy to have a CustomizerFolder and a CustomizerBTreeFolder.
Then again, I wouldn't mind if things stay as they are, except that
PlugInContainer is made to derive from BTreeFolder rather than Folder.
Of course, that creates a dependency that you need the BTreeFolder
product in order to use ZPatterns.
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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