I got the comserver working with Python clients (both pythoncom and
comtypes) by inheriting from COMObject and waving typelib chickens in the
air and setting _com_interfaces_. This involved reading the comtypes
source code and looking at the debugging messages. I was unable to get it
to work via the documented approach of subclassing from the python class
code-generated from the type-library.
I got it working with Excel on one development machine but only after
code-signing the _ctypes.pyd dll with a certificate that is a trusted
publisher on that machine. See below for a theory as to why that worked.
This has been a useful 'proof by construction' for me but it is still way
too hacky for me to use at work. I will investigate into py2exe (it is
amazing that Thomas Heller is the originator of three fiendishly
useful packages such as py2exe, ctypes and comtypes) to package the
recognizer as a DLL as I don't want a code-signed _ctypes.pyd laying
around waiting for trouble-makers!
pjjH
class Action(comtypes.COMObject):
_reg_threading_ = "Both"
_reg_clsctx_ = CLSCTX_LOCAL_SERVER | CLSCTX_INPROC_SERVER
_reg_clsid_ = "{5FCDCEC7-A951-4931-84A4-7A8CA3C9416F}"
_reg_typelib_ = comtypes.gen.SmartTagLib.Library._reg_typelib_
# Note the underscores on the LHS but not on the RHS
_typelib_path_ = comtypes.gen.SmartTagLib.typelib_path
_com_interfaces_ = [ISmartTagAction]
Note that the property names have '_get_' prepended to the property name.
def _get_VerbCount(self, SmartTagName):
'The total number of verbs that are supported by the
implementation for a given smart tag type.'
logging.debug('VerbCount')
return 1
This is the entry one has to make in HKCU to add the SmartTagAction to
Excel's list. However, this did not work initially as my Excel is set up
to trust only signed addins. I suspect that MOFL.DLL does its thing with
creating the recognizer and action COM instances early on shortly after
Excel starts up. If Excel is waiting for me to click around on the Message
Bar to OK loading up possibly dodgy content, I imagine that MOFL.DLL has
given up (silently) on initalizing that component and goes on about its
business. As a joke, I signed a copy of the _ctypes.pyd file with a
certificate that is a trusted publisher and -- rather amazingly -- the
caption from my Python recognizer showed up in the additional actions menu
and the debugging logs show the cell contents being passed correctly as a
parameter to InvokeVerb.
HKEY_CURRENT_USER\Software\Microsoft\Office\Common\Smart
Tag\Actions\{5FCDCEC7-A951-4931-84A4-7A8CA3C9416F}
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