def newGetTypeInfo(self,index,lcid=0): from comtypes.automation import IDispatch res = IDispatch._GetTypeInfo_orig(self, index, lcid) if not res: from comtypes import COMError from comtypes.hresult import E_NOTIMPL raise COMError(E_NOTIMPL,None,None) return res
def QueryInterface(self, interface):
"Query the object for an interface pointer"
# This method is NOT the implementation of
# IUnknown::QueryInterface, instead it is supposed to be
# called on an COMObject by user code. It allows to get COM
# interface pointers from COMObject instances.
ptr = self._com_pointers_.get(interface._iid_, None)
if ptr is None:
raise COMError(E_NOINTERFACE, FormatError(E_NOINTERFACE),
(None, None, 0, None, None))
# CopyComPointer(src, dst) calls AddRef!
result = POINTER(interface)()
CopyComPointer(ptr, byref(result))
return result
def _create_object_from_path (self, clsid, dll_filename, interface=IBaseFilter): iclassfactory = self._raw_guid(IClassFactory._iid_) my_dll = oledll.LoadLibrary(dll_filename) factory_ptr = c_void_p(0) hr = my_dll.DllGetClassObject(self._raw_guid(clsid), iclassfactory, byref(factory_ptr)) if hr!=S_OK: raise COMError(hr, '', '') ptr_icf = POINTER(IClassFactory)(factory_ptr.value) unk = ptr_icf.CreateInstance() # if ScreenCam or SpoutCam is loaded from local file, we also grab its property page if clsid==CLSID_ScreenCam or clsid==CLSID_SpoutCam: factory_ptr = c_void_p(0) hr = my_dll.DllGetClassObject( self._raw_guid(CLSID_SpoutCamPropertyPage if clsid==CLSID_SpoutCam else CLSID_ScreenCamPropertyPage), iclassfactory, byref(factory_ptr)) if hr!=S_OK: raise COMError(hr, '', '') ptr_icf = POINTER(IClassFactory)(factory_ptr.value) unk2 = ptr_icf.CreateInstance() self._page = unk2.QueryInterface(IPropertyPage) return unk.QueryInterface(interface)
def newGetTypeInfo(self,index,lcid=0): res=oldGetTypeInfo(self,index,lcid) if not res: raise COMError(E_NOTIMPL,None,None) return res
def Invoke(self, dispid, *args, **kw):
"""Invoke a method or property."""
# Memory management in Dispatch::Invoke calls:
# http://msdn.microsoft.com/library/en-us/automat/htm/chap5_4x2q.asp
# Quote:
# The *CALLING* code is responsible for releasing all strings and
# objects referred to by rgvarg[ ] or placed in *pVarResult.
#
# For comtypes this is handled in DISPPARAMS.__del__ and VARIANT.__del__.
_invkind = kw.pop("_invkind", 1) # DISPATCH_METHOD
_lcid = kw.pop("_lcid", 0)
if kw:
raise ValueError("named parameters not yet implemented")
result = VARIANT()
excepinfo = EXCEPINFO()
argerr = c_uint()
if _invkind in (DISPATCH_PROPERTYPUT,
DISPATCH_PROPERTYPUTREF): # propput
array = (VARIANT * len(args))()
for i, a in enumerate(args[::-1]):
array[i].value = a
dp = DISPPARAMS()
dp.cArgs = len(args)
dp.cNamedArgs = 1
dp.rgvarg = array
dp.rgdispidNamedArgs = pointer(DISPID(DISPID_PROPERTYPUT))
else:
array = (VARIANT * len(args))()
for i, a in enumerate(args[::-1]):
array[i].value = a
dp = DISPPARAMS()
dp.cArgs = len(args)
dp.cNamedArgs = 0
dp.rgvarg = array
try:
self.__com_Invoke(dispid, riid_null, _lcid, _invkind, byref(dp),
byref(result), byref(excepinfo), byref(argerr))
except COMError, err:
(hresult, text, details) = err.args
if hresult == DISP_E_EXCEPTION:
details = (excepinfo.bstrDescription, excepinfo.bstrSource,
excepinfo.bstrHelpFile, excepinfo.dwHelpContext,
excepinfo.scode)
raise COMError(hresult, text, details)
elif hresult == DISP_E_PARAMNOTFOUND:
# MSDN says: You get the error DISP_E_PARAMNOTFOUND
# when you try to set a property and you have not
# initialized the cNamedArgs and rgdispidNamedArgs
# elements of your DISPPARAMS structure.
#
# So, this looks like a bug.
raise COMError(hresult, text, argerr.value)
elif hresult == DISP_E_TYPEMISMATCH:
# MSDN: One or more of the arguments could not be
# coerced.
#
# Hm, should we raise TypeError, or COMError?
raise COMError(hresult, text, ("TypeError: Parameter %s" %
(argerr.value + 1), args))
raise
