Subject Re: [VirtualTreeview] Re: [IBO] Virtual Tree, IBO4 and Delphi6
Author Chuck Belanger


> To be honest with you, I'm not sure why you would want to load
> 35k records into a tree anyway. It becomes more or less unuseable for the
> user to use anyway. You should consider a more selective query. I will keep
> working on it though.

Wait until we have 100k records! Its a table of medically related information,
organized hierarchically for various testing purposes. Actually, there are a
number of levels, so that this presentation is the best for the job and most
accessible by the user. What user is going to know before hand what not to
include for a client? Thus, the difficulty in using a more selective query. We
are considering a user preference for the vendor specific parts of the table
(which represent about half of the items, the other half are generic medical
terms, drugs, etc).


> Paul
> ----- Original Message -----
> From: "Chuck Belanger" <phytotech@...>
> To: <>
> Sent: Sunday, July 08, 2001 4:16 PM
> Subject: Re: [VirtualTreeview] Re: [IBO] Virtual Tree, IBO4 and Delphi6
> > Paul:
> >
> > Just wanted to chime in here and say I tried IB_VTree with VirtualTree and
> had to make only minor changes for it to display properly, BUT for larger
> datasets (35,000 nodes) everything came to a complete halt as it was
> loading.
> >
> > I moved on to ElTree, but gave up on it because of the poor documentation
> and slow support. Then, based on Lester's mention, I tried Dream InfoTree.
> This component actually works. It separates the data from the tree which
> makes it easier to to use IBO components
> > (need TDataSet).
> >
> > It does something interesting with loading where it loads only the 1st
> root, then when the treeview is displayed and you click on a node, then it
> loads the next layer. You can turn off this feature, but then I end up with
> the same problem I had with Virtual Tree,
> > i.e. with larger datasets, the view never finishes loading.
> >
> > I mention this to hopefully help with any work you'll be doing on
> IB_VTree. I really liked VirtualTreeView and would prefer to go back to it,
> but I'm just not ready to tackle the issues that I ran into with IB_VTree
> (I'm still very new with Delphi5 programming.).
> >
> > Please continue with your upgrade!
> >
> > Thanks,
> >
> > Chuck Belanger, L.Ac.
> > (Licensed Acupuncturist)
> > Richmond, CA
> >
> >
> >
> >
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> >
> >
> >
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