Re: [platform-swt-dev] JFace TableViewer with VIRTUAL sample

[Robert Enyedi <renyedi@xxxxxxxxx>]

Indeed, I can see Veronika's reply on the mailing list archives. However, I
don't remember having read a mail with it. But I might be wrong :-)

Thanks for the reply.

Regards,
Robert

PS: Sorry for the misplaced JFace post. I'm putting it to the right mailing
list. Thanks for the help.


--- Carolyn MacLeod <Carolyn_MacLeod@xxxxxxxxxx> wrote:

> You should have received Veronika's Jan 20th reply.
> Here it is again:
> 
> Support for Table with the style VIRTUAL is only just now being added to 
> JFace.   Not 100% sure of the date when full support will be in place - 
> you need to ask this on the eclipse.platform newsgroup.
> 
> Carolyn
> 
> 
> 
> 
> Robert Enyedi <renyedi@xxxxxxxxx> 
> Sent by: platform-swt-dev-admin@xxxxxxxxxxx
> 01/26/2005 01:54 AM
> Please respond to
> platform-swt-dev
> 
> 
> To
> platform-swt-dev@xxxxxxxxxxx
> cc
> 
> Subject
> Re: [platform-swt-dev] JFace TableViewer with VIRTUAL sample
> 
> 
> 
> 
> 
> 
> Hmm, is there anyone reading/monitoring this mailing list? ...
> 
> --- Robert Enyedi <renyedi@xxxxxxxxx> wrote:
> 
> > Hi,
> > 
> > I've been extremely pleased to see the VIRTUAL flag support added for 
> the
> > JFace
> > TableViewer starting with 3.1M3. It is very required to have well 
> performing
> > tables in JFace.
> > 
> > My problem is that I cannot figure out how to use this feature. Or maybe 
> I've
> > found a bug.
> > 
> > I created a sample view with a TableViewer in it using the Eclipse 
> plug-in
> > creation wizard. In the resulting code I changed three things:
> > 
> > 1. The TableViewer is created with the VIRTUAL flag:
> > 
> > new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL |
> > SWT.VIRTUAL)
> > 
> > 2. The view content provider's getElements() method returns an array of
> > 100,000
> > Strings.
> > 
> > 3. I removed the sorter.
> > 
> > While the content is created in 1-2 seconds, when the VIRTUAL flag is 
> set,
> > the
> > display of the content takes a lot (around 1 minute). However, if the 
> VIRTUAL
> > flag is not specified, the display is much faster (but not that fast - 
> around
> > 5-6 seconds).
> > 
> > What am I doing wrong? Why doesn't the VIRTUAL flag reduce the display 
> time
> > to
> > around 1-2 seconds? Isn't this what it's supposed to do?
> > 
> > Regards,
> > Robert
> > 
> > 
> > 
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> 
> 
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