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Xviewer performances [message #1486799] Tue, 25 November 2014 09:46 Go to next message
Pascal Will is currently offline Pascal WillFriend
Messages: 5
Registered: July 2009
Junior Member
Hi,

In my application, there is a tree with only two levels but which will contain at least 25.000 roots. What's more, my tree has 14 columns.

I would like to use Xviewer which offers a range of very efficient and interesting functionnalities.

However, the problem is that, in my case, the tree is loading excessively slowly. It looks like SWT.VIRTUAL is not active.

Is the slow loading normal? If so, how can the loading time be reduced?

It appears that, in JFace, there are problems involving trees (not tables) with SWT.VIRTUAL.

Thus, I have the following performance (if I change my tree to a table by removing one level)

25,000 nodes - Tree SWT.VIRTUAL -> > 20 sec
25,000 nodes - Table SWT.VIRTUAL -> > 2 sec

So, if in XViewer the problem with these data volumes stems from the fact that it is a tree, is it possible to change the tree to a table?
If so, how?
Or is there a "table" version of Xviewer?

Thank you.

Best regards,

Pascal.
Re: Xviewer performances [message #1487461 is a reply to message #1486799] Tue, 25 November 2014 21:55 Go to previous messageGo to next message
Wim Jongman is currently offline Wim JongmanFriend
Messages: 432
Registered: July 2009
Senior Member

Hi Pascal,

AFAIK the XViewer is not capable of being lazy. So setting the SWT.VIRTUAL bit will have no effect. If you want XViewer to be virtual capable you have to file a bug against technology/nebula/xviewer.

JFace trees can be virtual. I don't know of any problems with SWT.VIRTUAL on regular JFace treeviewers.

The Nebula Grid widget and the Nebula NatTable widget have the virtual capability and both are table based. However, they lack some of the on-board features of XViewer (but have other features of their own).

I hope this helps,

Best regards,

Wim

[Updated on: Wed, 26 November 2014 08:31]

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Re: Xviewer performances [message #1489608 is a reply to message #1487461] Thu, 27 November 2014 14:18 Go to previous messageGo to next message
Pascal Will is currently offline Pascal WillFriend
Messages: 5
Registered: July 2009
Junior Member
Hi Win,

thanks for your answer.

I will see in more details the Grid Viewer.

Best regards,

Pascal.
Re: Xviewer performances [message #1490598 is a reply to message #1489608] Fri, 28 November 2014 09:16 Go to previous message
Thomas Schindl is currently offline Thomas SchindlFriend
Messages: 6417
Registered: July 2009
Senior Member
Hi,

We have not publicly announced yet but we are currently working on a
high-performance-feature rich Grid-Framework.

Only problem - it requires Java8 - the underlying control is currently
Nebula-Grid but because the Facade does not impose an UI-Toolkit
information the internal implementation could be fairly everything.

We also don't yet support Tree functions which we'd need someone to fund!

See https://github.com/BestSolution-at/framework-grid

Tom

On 27.11.14 15:18, Pascal Will wrote:
> Hi Win,
>
> thanks for your answer.
>
> I will see in more details the Grid Viewer.
>
> Best regards,
>
> Pascal.
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