[V4RB] fields

[Ruslan Zasukhin]

on 2/11/03 8:01 PM, Pedro fp at lists at pedro.net.au wrote:

Hi Pedro,

> I have sub-classed some Valentina filed classes so that I can give them
> a couple of extra properties. Currently each  sub-classed field has a
> method setExtras which simply assigns the parameters passed to the
> extra properties like this ...
> 
>  fSeqTop = new P2VVarChar( "seqTop", 504, "ASCII", kv_Nullable )
>  fSeqTop.setExtras( "Top", true )
> 
> If possible I would prefer to give my sub-classes constructors so that
> those 2 lines would become ...
> 
>  fSeqTop = new P2VVarChar( parameter list )
> 
> Is this possible?

This MUST be possible from OO point of view.
But I recall that about 2 years ago somebody have try subclass in this way
Cursors...and fail because of bug in REALbasic, which prevent correct sub
classing of plugin classes.

May be this bug already fixed.
I just don't know. So try to see.

> If so can anyone offer tips as to how I set the field
> properties within the constructor of my sub-class?

Just an idea, this is NOT correct syntax of RB!
You need look into RB docs for correct syntax how to create ctor of
subclass.

MyClass( .. )

    VVarChar( name, ... )

    p1 = ..
    p2 = ...

end

> Also, I have group of fields which are the same except for their names.
> Could I declare a field property in my BaseObject as an array &
> construct those fields in a loop?

I think yes, no problems here.

-- 
Best regards,
Ruslan Zasukhin      [ I feel the need...the need for speed ]
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e-mail: ruslan at paradigmasoft.com
web: http://www.paradigmasoft.com

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