OOP question: self contained class or use of "external" typedefs...

Hi all,
I am trying my first steps into Labview OOP and am currently thinking on how to best proceed.
I have an existing RT application running on a CRIO system that has as one of its components,
a multi channel analyzer (MCA8000).
I thought this would be a good candidate for my first LV class since the vi's I curently have for this MCA
are all connected via a rather large cluster with sub-clusters to store status information and so on for
this device. Exactly the kind of data which is better defined as private within a class!
In the currently working code for the whole intrument (non-OOP) I use several queues to send commands
to indivudal loops of the software and one general message and error logging queue.
In the code I want to re-implement as OOP for the MCA I use data queues and the "general" logging
queue of the main program. These queues are all typedefed in the main program.
So instead of error in's and out's I have the typedefed logging queue as input and errors are logged there
when they occur. Not sure if this is good practice but this is a good way to let the user know of errors that occur
on the RT target since the queued log "entries" are all sent to the UI which runs on a laptop.
The MCA specific queue typedefs I can include into the class project so that they are part of the MCA class.
What I am not sure about is how to handle the "general" logging queue since it is also used elsewhere in the main
program. And I am not "yet" planning of re-implementing the whole thing using oop, I wanted to start with a small
overseeable project.
In a fully OOP project I would probably define the logging queue in a parent class if I understand OOP correctly?
Sorry, I am rather new to LV OOP so I might be asking something obvious...
Olaf

If you are really planning on implementing your OOP in pieces I would recommend attacking it from the most common and shared items first. So, start with your logs, error processing and messaging components. These are the types of things that will get used by your higher level classes. They also tend to be a bit more self contained and easier to start with.
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot

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I have read this post over and over and there are some strange things going on with analyzing media now. I am absolutely sure that my HD footage (from a Z1U) used to be read by QT at 1440x1080 (1920x1080). Actual pixels were 1440x1080, a 4x3 aspect ratio, but displayed at 1920x1080. Used to be, like I said. I recently upgraded to OS 10.6.4, and QT 10 is quite a bit different. (In fact, other that the new skin, I haven't found any new features I like. Beside the point.) Now I get a QT readout like yours: 1440x1080 (1888x1062). A 4x3 capture aspect ratio and a 16x9 display aspect ratio, but not the same numbers. This can't be right--by law one of them has to be incorrect. I suspect the new version of QT. The same clip in FCP is read as as 1440x1080 with the HDV pixel aspect ratio (Edit --> Item Properties --> Format.) Furthermore, the readout from MediInfo Mac (endorsed by Apple) is even stranger: 1416x1062, a 4x3 aspect ratio, betraying yet another suspect data output. May be MediaInfo is correct, maybe not. I suspect no--my gut says FCP is correct, since it was once matched by QT. So, three analyzations and three results. The only conclusion is one or more of the analyzers is incorrect.
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