James Teh schrieb: > Hi all, > > I am a little confused about the "this" parameter to COM events. > > When one wants to receive COM events, one does something like the following: > self._advise = comtypes.client.GetEvents(self._server, Sink()) > where the Sink class has methods such as: > def onEvent(self, this, arg1, arg2): > ... > > However, it seems that there has recently been a change in the way > "this" is handled. (I am not sure what version of comtypes this occurred > in, but I suspect 0.5.1.) It seems that the name "this" is somehow > special. If the exact parameter name "this" is not present as the first > argument, the event seems to work fine without it. For example, the > following works: > def onEvent(self, arg1, arg2): > However, this does not work: > def onEvent(self, this, arg2): > It would seem that the "this" parameter is now optional. Unfortunately, > with another COM server, if "this" is present at all, the event function > is not fired. > > Can anyone provide some clarification as to the status of the "this" > parameter in comtypes 0.5.2? Is "this" now optional? Is the name "this" > special?
Just yesterday I answered mostly the same question, see the last post in the thread 'returning HResult value from event handlers'. In short: Yes, behaviour has changed between 0.4 and 0.5; yes the name 'this' is special; yes it is optional, but if you still use the 'this' parameter (with exactly that name) then the behaviour should be the same in 0.4 and 0.5 . -- Thanks, Thomas ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ comtypes-users mailing list comtypes-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/comtypes-users
