Hi Frederico,
as this sound like a bug I a created a ticket here:
http://bugs.mitk.org/show_bug.cgi?id=19329
I’ll have a closer look at this next Wednesday. In the meantime could you try
if the problem also exists if you get the DataNode and and execute
dataNode->SetDataInteractor(NULL)
instead of
dataInteractor->SetDataNode(NULL) ?
My first guess would be that the notification about these changes are somehow
missed and the mitk::Dispatcher still holds a reference to your DataNode.
(You can query with GetNumberOfInteractors() on the Dispatcher if this might be
the case)
Cheers,
Christian
Von: Federico Milano [mailto:fmil...@gmail.com]
Gesendet: Mittwoch, 16. September 2015 18:34
An: mitk-users@lists.sourceforge.net
Betreff: [mitk-users] DataNode extra reference
Hi. In my View I'm creating a DataNode and adding it to the DataStorage; I'm
also creating a DataInterator and using the SetDataNode method to bind the new
DataNode and the DataInteractor. I'm not storing any reference nor smartpointer
to that DataNode anywhere else.
I've noticed that the DataNode is never destroyed when I delete it from the
DataStorage. I have implemented NodeRemoved on my view to check the reference
counting. It arrives with 5 references to this method (a surface node without
an interactor comes with 3 references at that time). So, I thought, there is a
cycle between the DataInteractor and the Datanode. After getting the
DataInteractor and setting its DataNode to NULL, the DataInteractor is
destroyed and my DataNode count reduces to 4 references. I still have one more
reference than a normal surface node.
I'm registering my own mapper to display my node (it holds a PointSet but I'm
displaying it differently); I'm not storing any reference to the node in my
Mapper.
I find that this is a problem really hard to debug; do you have any clue/hint
of what could be going on?
Thanks,
Federico
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