[pywin32-bugs] [ pywin32-Patches-3519768 ] Allow multiple type libraries

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Patches item #3519768, was opened at 2012-04-20 02:08
Message generated for change (Comment added) made by mhammond
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: YanXu (stelzbock)
Assigned to: Nobody/Anonymous (nobody)
Summary: Allow multiple type libraries

Initial Comment:
As explained in my post to the python-win32 mailing list ("How to write a COM Server implementing interfaces from type lib?"), I have patched the policy.py to support multiple type libraries.

This should work in parralel to the exisisting one-type-lib feature. Using the changed version, a new attribute can be used in the COM implementation class called "_typelib_interfaces_". This attributes is expected to be a list tuplse of the library CLSID string, the major and minor version, the LCID and a list of Interface strings. 

Here is an example I used in my server:

class OPCServer():

	(...some other attributes...)

	_typelib_interfaces_ = [ 
		("{3B540B51-0378-4551-ADCC-EA9B104302BF}", 3, 0, 0,
			[
			'IOPCServer',
			'IOPCItemProperties',
			]
		),
		("{B28EEDB1-AC6F-11D1-84D5-00608CB8A7E9}", 1, 0, 0,
			[
			'IOPCCommon',
			'IConnectionPointContainer'
			]
		)
	]

Actually, the patch includes some comment that say "PATCH START". 

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>Comment By: Mark Hammond (mhammond)
Date: 2012-11-23 21:23

Message:
I'm very sorry for the delay in looking at this.

Wouldn't it be possible to implement this by just allowing a new, say
_typelibs_ attribute, which is a list of (guid, major_ver, minor_ver)
tuples, then have _build_typeinfos_ search all specified typelibs for the
interfaces?  It seems like that would make for a less-intrusive patch and
allow us to deprecate _typelib_guid_ and _typelib_version_ for _typelibs_.

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