Ok, thanks.

weak_ref2._comobj_ looks a bit ugly and counter-intuitive. Perhaps
pyxpcom could do that implicitly if we pass a WeakReference to a method
that accept a nsIWeakReference?

On Thu, 2007-06-21 at 12:26 -0700, Shane Caraveo wrote:
>  Ahh, I see the problem.  pyxpcom WeakReference class != nsIWeakReference 
>    instance, but is a wrapper of that instead to may xpcom weakreferences 
>  work like python weakreferences.  So you cannot use 
>  xpcom.client.WeakReference directly.  What you had in the first place is 
>  the correct thing to do:
>  
>  self.browser.addWebBrowserListener(weak_ref2._comobj_,
>                                      interfaces.nsIWebProgressListener)
>  
>  Shane
>  
>  Tomeu Vizoso wrote:
>  > Yeah, I have read that at least a dozen times today ;)
>  > 
>  > self.browser.addWebBrowserListener(WeakReference(chrome, interfaces.nsIWebProgressListen
er),
>  >                                    interfaces.nsIWebProgressListener)
>  > 
>  > doesn't work: 
>  > 
>  > File "<XPCOMObject method 'addWebBrowserListener'>", line 3, in addWebBrowserListener
>  > TypeError: Objects of type 'instance' can not be used as COM objects
>  > 
>  > On Thu, 2007-06-21 at 11:29 -0700, Shane Caraveo wrote: 
>  >> From the doc string for WeakReference:
>  >>
>  >> class WeakReference:
>  >>      """A weak-reference object.  You construct a weak reference by passing
>  >>      any COM object you like.  If the object does not support weak
>  >>      refs, you will get a standard NS_NOINTERFACE exception.
>  >>
>  >>      Once you have a weak-reference, you can "call" the object to get
>  >>      back a strong reference.  Eg:
>  >>
>  >>      >>> some_ob = components.classes['...']
>  >>      >>> weak_ref = WeakReference(some_ob)
>  >>      >>> new_ob = weak_ref() # new_ob is effectively "some_ob" at this point
>  >>      >>> # EXCEPT: new_ob may be None if some_ob has already died - a
>  >>      >>> # weak reference does not keep the object alive (that is the point)
>  >>
>  >>      You should never hold onto this resulting strong object for a long 
>  >> time,
>  >>      or else you defeat the purpose of the weak-reference.
>  >>      """
>  >>
>  >>
>  >> Tomeu Vizoso wrote:
>  >>> Hi all,
>  >>>
>  >>> I need to pass a reference to a nsIWeakReference to
>  >>> nsIWebBrowser.addWebBrowserListener(nsIWeakReference listener, nsIIDRef
>  >>> IID).
>  >>>
>  >>> The only way I've found to do it is this:
>  >>>
>  >>> listener = xpcom.server.WrapObject(chrome, interfaces.nsIWebProgressListener)
>  >>> weak_ref2 = xpcom.client.WeakReference(listener)
>  >>> self.browser.addWebBrowserListener(weak_ref2._comobj_,
>  >>>                                    interfaces.nsIWebProgressListener)
>  >>>
>  >>> I guess weak_ref2._comobj_ is not the best way to get a nsIWeakReference.
>  >>>
>  >>> Any suggestion?
>  >>>
>  >>> Thanks,
>  >>>
>  >>> Tomeu
>  >>>
>  >>> _______________________________________________
>  >>> pyxpcom mailing list
>  >>> pyxpcom@[...].com
>  >>> To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
>  > 

_______________________________________________
pyxpcom mailing list
pyxpcom@[...].com
To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs