You said that last time, and I still don't know what it means to change
on the basis of an id attribute.
I am recommending you not use {} to assign the dataprovider if possible.
If you are changing the xml, you may need to cal validateNow before
calling expandItem.
________________________________
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Baljeet singh
Sent: Wednesday, September 05, 2007 11:07 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Tree collapses when dataProvider for tree
changes
Hi,
Thanks for suggestion. But dataProvider has to be changed, &
accordingly tree changes.
Considering XML as tree of nodes, I am retrieving that particular
node when dataProvider changes on the basis of "id" attribute . Each
node is going to have unique value for "id" atribute in XML String. By
this way i gets a XML object.
That XML object is used for expandItem() method or for selectedItem
attribute.
Thanks & Regards,
Baljeet
--- In flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
, "Alex Harui" <[EMAIL PROTECTED]> wrote:
>
> Where the XML comes from shouldn't matter. Think of XML as a tree of
> nodes each with a unique id (UID). The Tree tracks the UIDs of nodes
> that are open.
>
> If you change the XML enough, the set of nodes, even if they look the
> same, may have new UIDs and thus the set of open items and calls to
> expandItem may not work.
>
> Also note that if you bind to the XMLListCollection, you risk changes
to
> the collection causing the collection to be re-assigned and thus flush
> the open items list.
>
> Thus:
> [Bindable[
> var xmlc:XMLListCollection;
> <mx:Tree id="foo" dataProvider="{xmlc"} />
>
> may end up resetting the dataProvider as you modify xmlc.
>
> var xmlc:XMLListCollection
> <mx:Tree id="foo" initialize="foo.dataProvider=xmlc" />
>
> Will not reset as it is not watching the collection for bindable
> changes. Similarly, if you assign the dataProvider on the result of
the
> server fetch, you'll be safer that way too.
>
> ________________________________
>
> From: flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
[mailto:flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
]
On
> Behalf Of Baljeet singh
> Sent: Wednesday, September 05, 2007 9:19 PM
> To: flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
> Subject: [flexcoders] Re: Tree collapses when dataProvider for tree
> changes
>
>
>
> Hi,
>
> Actually, i am using XML string, that is coming from server side.
> From that XML string, i get the XMLListCollection as dataProvider.
> When i click on selected node, either i am editing th information
> related to node or creating children. This edited/children information
> is stored in database.
> So, dataProvider changes(it's required). Tree is
> created on the basis of "id" attribute of each XML node . When
> dataProvider changes, i again retrieve that node on basis of "id"
> attribute. Then i tried to use expandItem() method, selectedItem etc,
> providing the retrieved node. But it's not working.
>
> Thanks & Regards
> Baljeet
>
