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If only the Dialog data types had been marked as EXTENSIBLE this would
have enabled a BlackBox user to implement the required additional fields
and methods without too much difficulty, wouldn't it? Or am I
overlooking something?
Chris Burrows
CFB Software
info{([at]})nowhere.xy
http://www.cfbsoftware.com/gpcp
> -----Original Message-----
> From: Wijck, Bart van [mailto:Bart.van.Wijck{([at]})nowhere.xy> Sent: Wednesday, 1 September 2004 16:44
> To: 'Gérard Meunier'; blackbox{([at]})nowhere.xy> Subject: RE: SetData pointer facility for Dialog list
> structures (List, Combo, Selection)
>
>
> Hi Gerard,
>
> Neat idea to use an AVL tree to implement the list (instead
> of a linked
> list) and thereby retain the SetData facility, that certainly
> would work well. However to make BlackBox really consistent I
> think the SetData procedure should be tied to Dialog list
> structures as well. It's not a big point, but I wonder how
> many Black Box programmers are looping through a linked list
> to retrieve the original key structure. I bet I was not the first.
>
> By the way do OmS still do minor updates to BlackBox?
>
> Thanks for your input,
>
> Regards
>
> Bart
>
> -----Original Message-----
> From: Gérard Meunier [mailto:gemeu{([at]})nowhere.xy> Sent: Tuesday, August 31, 2004 3:05 PM
> To: blackbox{([at]})nowhere.xy> Subject: Re: SetData pointer facility for Dialog list
> structures (List, Combo, Selection)
>
>
> Bart,
>
> > Easily resolved ofcourse if you use an array to fill the
> dialog list
> > structure (i.e. the selected index is the index value in the array).
> >
> > However there must be many instances where the length of
> the list is
> > dynamic. So using a SetData pointer facility would be the trick. A
> > suggestion for improvement?
>
> Instead of an array, you may use a dynamic structure to store
> your data. One very useful and efficient dynamic structure is
> an AVL tree (see e.g. D. E. Knuth, The art of Computer
> Programming, vol. 3). You can find an implementation of AVL
> trees in UtilAvl (http://www.zinnamturm.de/#Util).
>
> Regards.
>
> Gérard
>
--------------------------------------------
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Received on Wed Sep 01 2004 - 09:52:19 UTC