Comments on: Filtering a Flex Tree using an ArrayCollection

By: ashish

ashish — Wed, 09 Nov 2011 07:19:35 +0000

when i try to search “peter” tree gets properly filtered and shows me only ‘peter’ under ‘Grandma Susan’ but when i click on trangel to collapse it same ” error 1010″ is found. (this error is specially occur when data contain only one entry)
any one can try this on the same site. after showing me error again try to open the tree, it ll not be worked until u refresh the browser.

plz if any one has soln for the above problem post ur comment
thanks in advance.

By: Jody Flack

Jody Flack — Mon, 07 Nov 2011 22:32:48 +0000

hey, great blog! love it

By: Benydo

Benydo — Wed, 28 Sep 2011 14:32:59 +0000

I don’t know if you found a solution to the problem mentioned at 2, but maybe dispatching a CollectionEvent each time after the refresh call with CollectionEventKind.RESET will fix this problem. To be honest i also dispatch one after the invalidateList, but this is maybe unnecessary.

Arthur this is also solves your problem.

By: Arthur

Arthur — Thu, 21 Jul 2011 22:56:51 +0000

I am developing a similar example and had a problem with scrollbar’s parent container. When I expand the tree, it creates the verticalscroll, but if I filter the tree to have a few nodes to disappear scrollbar, the scrollbar remains the same size, and if I scrolling, happens some issue in the layout tree ..

I tried to call invalidateDisplayList in parant container but don’t it fixed the problem.

any suggestions?

Thanks

By: Kalen Gibbons

Kalen Gibbons — Mon, 21 Feb 2011 20:46:41 +0000

Hi Joe, it all depends on your use case. Thanks for posting your code, it may come in very handy for someone looking for the same result.

By: Joe

Joe — Sun, 20 Feb 2011 19:58:27 +0000

I think this example works incorrectly because in 100% of cases I envision, the children of a filtered item should be visible. For instance, if I’m trying to filter store locations by state and I type “ca”, I want to see a list of stores in California. In your example, if I type “t”, Tiffany node is visible, but its four child nodes disappear. I fixed it by changing filter data to unfilter child node if a node returns true:

if (searchString.length == 0
|| item.name.toLowerCase().indexOf(searchString.toLowerCase()) >= 0) {
if (item.children) {
item.children.filterFunction = null;
item.children.refresh();
}
return true;
}

By: Kalen Gibbons

Kalen Gibbons — Fri, 04 Feb 2011 21:08:24 +0000

Hi Umer,
It sounds like you’re “lazy loading” the branches of your tree. If you wanted to do a search you would need to query your server for that person and, if found, have the server return the path to that person. For example 2-4-3-5 could mean that the user is 5th node on the 3rd branch on the 4th branch of the 2nd branch of the root node. Then you would traverse your tree from top to bottom either opening or loading branches until you get to the requested person node.

By: Umer

Umer — Fri, 04 Feb 2011 18:04:54 +0000

Very nice, ONE Question

how would I find some particular person in tree, in my case on root elements come from server, one i click it ll fetch children, then if you click on children it ll fetch its respective children , hence tree can be opened, ITS WORKING but
I want to locate an object lets say person xyz, which is on 6th level, how would I open tree step by step to reach that level , please help me on that, thanks
Umer

By: Kalen Gibbons

Kalen Gibbons — Thu, 30 Dec 2010 21:29:10 +0000

Hi Basil,
I’m sorry, but no, I never got around to creating an example using an xmlCollection. The code shown in this post was more of a proof-of-concept than anything and several commenter have pointed out flaws with this approach. I would recommend looking into using the ITreeDataDescriptor class for doing this type of filtering instead.

Simon previously posted a comment with this link (http://www.richardleggett.co.uk/blog/index.php/2009/05/11/filtering-hierachical-data-in-flex-itree) that explorers the topic more thoroughly than I have done here. I recommend you check it out.

By: Basil

Basil — Thu, 30 Dec 2010 07:51:20 +0000

Good morning and happy holidays,
Have u ever had the chance to convert this example for a xmlCollection?
I’ve been trying to make it work with data loaded from an XML but with limited success.
Thanks