[python-win32] Calling ShellIconOverlayHandlers does not work

[Lohse, Thomas]

Thanks a lot, Roger. Upgrading to build 212 solved the problem.

Cheers,
Thomas


Thomas Lohse wrote:
> Hello,
> 
> could anyone provide some assistance in using
ShellIconOverlay-Handlers
> with pythoncom. I implement a kind of file explorer and would like to
> call the ShellIconOverlay-Handlers (registered by TortoiseSVN) of the
> windows explorer to visualize SVN-states. (I'm NOT about to implement
my
> own handler).
> 
> I can successfully CoCreateInstance these handlers and receive an
> implementation of IShellIconOverlayIdentifier interface.
> GetOverlayInfo() and GetPriority() both work fine on the interface,
but
> IsMemberOf(path, attributes) always returns None instead of S_OK,
> S_FALSE, E_FAIL or an exception. This is the case whether the passed
> path exists or not and is independent of the passed attributes.
> 
> Why does IShellIconOverlayIdentifier::IsMemberOf() not work? Any
advice
> or hint would be very appreciated.
> 
> 
> Yours sincerely,
> Thomas
> 
> 
> My approach to using ShellIconOverlay handlers:
> 
> import sys
> import pythoncom
> import win32api, win32con
> 
> from win32com.shell import shell
> from winerror import S_OK, S_FALSE, E_FAIL
> 
> 
> def CallIconOverlayHandler():
>    path = sys.argv[1] if len(sys.argv) > 1 else u"C:\\foo"
>    
>    # Query CLSID for 1st registered IconOverlayHandler
>    # (there should be handler "Offline Files" at least, since included
> in Win)
>    regKey = win32api.RegOpenKeyEx(win32con.HKEY_LOCAL_MACHINE,
> 
>
ur"SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayId
> entifiers")
>    name = win32api.RegEnumKey(regKey, 0)
>    clsId = win32api.RegQueryValue(regKey, name)
>    win32api.RegCloseKey(regKey)
>    
>    print u"Using %s: %s" % (name, clsId)
>    ovHdl = pythoncom.CoCreateInstance(clsId, None,
>                                       pythoncom.CLSCTX_INPROC_SERVER,
> shell.IID_IShellIconOverlayIdentifier)
> 
>    #Works fine
>    print u"GetOverlayInfo():", ovHdl.GetOverlayInfo()
>    print u"GetPriority():", ovHdl.GetPriority()
> 
>    #Problem: IsMemberOf returns always None
>    print u"IsMemberOf(\"%s\", 0):" % path, ovHdl.IsMemberOf(path, 0)
>    
>    print u"Done."
> 
> if __name__ == "__main__":
>    CallIconOverlayHandler()

Try upgrading to build 212.  There was a bug in this method
that was fixed recently.

            Roger

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