Hello Mathias, Thanks for the response. I've double-checked that:
- registration of the slideshow listener is successful (I receive all other events as expected), - my listener derives only from the XSlideshowListener class, and - at no other point in my code do I remove the listener. Here are a few more details on the problem: 1. I do not receive a dispose() call both for the case that I have manually called XPresentation.end() (before the slide show is complete), and the case that the slideshow exits normally. 2. Same goes for in-window as well as full-screen presentations. 3. When I attempt to de-register the listener, the actual error preventing me from doing so is that XPresentation2.getController() returns null. Of course, this only occurs when the slideshow has already been disposed by the third party. 4. I am developing on Symphony 3 beta 3, which I am fairly certain uses OO 310m11(Build:9399) (at least, that is the version in its unoil.jar/MANIFEST.MF). I should mention that this issue is not necessarily an impediment, as I've long-since simply removed the de-register without any observable side effects. It would be much more satisfying, however, to get to the root issue. :) -- Cameron On Fri, Jun 25, 2010 at 3:29 AM, Mathias Bauer <nospamfor...@gmx.de> wrote: > Hi Cameron, > > > On 06/23/2010 08:47 PM, Cameron Flint wrote: > >> Hello, >> >> I have a class which implements XSlideshowListener, and attempts to >> override >> the disposing() (from the XEventListener superclass) in order to set a >> flag >> to ensure that I don't try to remove it a second time if the target >> slideshow has already been disposed. However, I never seem to get this >> call. >> Consequently, my cleanup routine which calls >> XSlideShowController.removeSlideshowListener() receives a >> NullPointerException since the slideshow has already terminated, unbeknown >> to my listener. >> >> It would seem that a listener registered on a slideshow should be notified >> when that slideshow disposes, or am I mistaken? >> > > No, you are right. When an object is disposed, it will notify all > registered event listeners. So if an object obviously was disposed, but you > didn't receive a notification, the reasons that I could imagine are > > - your registration failed or was not carried out at all > - your class derives from another one that implements the disposing() > method and you accidently used a wrong method declaration > - your listener was removed already before the slide show was disposed > > Did you receive any slide show events? Have you made shure that the > listener wasn't removed before the slide show was disposed? > > Regards, > Mathias > > -- > Mathias Bauer (mba) - Project Lead OpenOffice.org Writer > OpenOffice.org Engineering at Sun: http://blogs.sun.com/GullFOSS > Please don't reply to "nospamfor...@gmx.de". > I use it for the OOo lists and only rarely read other mails sent to it. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@api.openoffice.org > For additional commands, e-mail: dev-h...@api.openoffice.org > >
