[Paraview] Are GetMacro/SetMacro Necessary for Source Modules?

[godach@juno.com]

Hello,

This is probably a dumb question, but as I am currently in the processs 
of writing a source module, I wonder if it is necessary to write a set 
of macro functions for each member attribute. Or can I just write my 
own setXXX/getXXX functions? In fact, I am curious how the modules work:
When Parview users change the attributes of a source, does Paraview 
call the corresponding setMacro functions and call the Execute/Update
function upon clicking "Accept"? 

And I am also curious if the XML definitions for the modules are 
available online, or could anyone kindly point out the files in the 
src that contains such info?

Thanks for your help!

Best wishes,

Daniel

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