Re: [platform-swt-dev] inefficient TreeItem

[Carolyn MacLeod <Carolyn_MacLeod@xxxxxxxxxx>]

Here is an example snippet showing how
to create a virtual tree using a SetData listener.
http://dev.eclipse.org/viewcvs/index.cgi/~checkout~/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet202.java

Carolyn

From:	Tom Schindl <tom.schindl@xxxxxxxxxxxxxxx>
To:	"Eclipse Platform SWT component developers list." <platform-swt-dev@xxxxxxxxxxx>
Date:	19/04/2010 08:19 AM
Subject:	Re: [platform-swt-dev] inefficient TreeItem
Sent by:	platform-swt-dev-bounces@xxxxxxxxxxx

---

Please ask user questions on the newsgroup. What you
want is a
virtual-tree where items are only created when scrolled into view.

Tom

Am 19.04.10 14:12, schrieb Tech Id:
> Hi,
> 
> I was planning to use the SWT Tree for showing some amount of data
(not
> huge, but big amount).
> I have to parse a file and create item for each token.
> The biggest file I have is having 40k tokens.
> While parsing the file for tokens (some small string processing
> algorithm) happens within 2 seconds, creating 40k itmes takes around
40
> seconds!!!
> 
> I understand that creating a TreeItem is definitely lot more work
than
> parsing a token, but still.
> Can it not be made faster such that all 40k items are made within
5 seconds?
> (Maybe some kind of delayed painting of items (not creation) would
help.
> Any Ideas?)
> 
> 
> I use the following line of code to create the TreeItem:
>     TreeItem tree_item = new TreeItem (tree, SWT.NONE);
> 
> Regards
> Techieeee
> 
> 
> 
> _______________________________________________
> platform-swt-dev mailing list
> platform-swt-dev@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/platform-swt-dev


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