Methods of class contained in an other class

Question

Hello,
i would like to know is there is another way than  what i do with classes embeded in another:
ex i have a device classe that containe a class Com (rs232 ...)
what i do whan i want to setup a com of a device is get com objet of device then appliing change on COM with com methodes
is there a way to apply com methode directly to Device ?  i thought about putting get instr method in Com class so unbundle is done directly
but i don't think this is a good thing ...
Is there something to do with friend class or community ?
see attached .jpg
Regards
Tinnitus
CLAD / Labview 2011, Win Xp
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classes methodes.jpg ‏25 KB

Answer 1

Hi Tinnitus,
I think you are talking about "inheritance".
Inheritance means that you have a "parent" class and a "child" class.
The "child" is a special type of "parent". Such as a "dog" is a special type of "animal".
The child class has access to all the methods and properties of the parent class.
And the child class can have additionnal methods/properties that the more generic class doesnt have.
It is also possible to overide the methods in the child class to customize them.
For more information about this concept:
LabVIEW Object-Oriented Programming: The
Decisions Behind the Design
http://zone.ni.com/devzone/cda/tut/p/id/3574
In the LabVIEW project explorer, you can go to the properties of a class, and define this class as the child of another class (modify inheritance).
Then, when you instantiate the child class, the object can access the methods/properties of it's parent class.
However, if you instantiate the parent class, the object won't be able to access the methods that are specific to the child class.
The parent class is more generic than the child class.
Hope this will help.
Best regards,
Thomas B. | CLAD
National Instruments France
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