Hi everybody,

I tried to implement on overlay showing the name of an object. I found
the presentation of Christoph (
http://mitk.org/images/d/d1/BugSquashingSeminars%24Overlays_in_MITK.pdf
) about overlays. I implemented it as in line 9. The overlay is shown.
The problem appears when I delete the node because the overlay stays
even I added the code to ReleaseGraphicsResources.

By checking the documentation I figured out that the syntax changed and
I used an old version. Instead of vtkRenderWindow you have to pass the
baseRenderer directly. But even with this change it is not called. I
also checked the method of the parent class and it is also not called.
In my understanding this method has to be called automatically before
the mapper is destroyed, right? In my case it is not called. So the
mapper is destroyed and the overlay stays forever. Do I have to call it
manually before deleting it? If yes how do I do that?

I also found this bug http://bugs.mitk.org/show_bug.cgi?id=13121
Is there any connection? It looks like that MITK expects the call of
ReleaseGraphicsResources but does not receive it.

Thanks for your help and have a nice weekend.

Best

Martin
-- 


Martin Klemm
Hochschule Offenburg
Badstraße 24
77652 Offenburg
Tel. +49 781 / 205 - 4681

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