[Insight-users] callback mechanism

[Luis Ibanez]

Hi Soumen,


The callback mechanism used by the DICOMAppHelper is *not*
representative of the ITK architecture.

The official mechanism for passing messages in ITK and
VTK is the use of Commad/Observers and Events.

The DICOMAppHelper was assimilated from a pre-existing
software (that's why it is in the "Utilities" subdirectory)
and uses a more traditional callback approach.

You will find the definition/declaration of DICOM callbacks
in the file

     Insight/Utilities/DICOMParser/DICOMParser.h

It basically passes pointers to member methods in order to
be used as callbacks.


You don't really need to deal with the callbacks if you
use the DICOMSeriesFileNames in

                   Insight/Code/IO


Please look at the code for the ISIS application posted
in the previous message.
http://www . itk . org/pipermail/insight-users/2003-September/005090 . html



Regards,


   Luis



------------------
Soumen Dey wrote:
> Hi all,
> In trying to reading a dicom series I am facing problem regarding
> seriesuid callback. So I want to know about the callback mechanism of itk
> in detail i.e how call back functions get invoked,registration of callback
> function etc.
> thnx.
> soumen
> 
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