I can refresh the XMLListCollection with a "TreeDataCommand". This
contacts the server and requests a full tree XML, which is then
converted to a new XMLListCollection. If I use this method, the tree
collapses to its initial state, which is undesirable.
addChildAt() is the method I have been trying to use. This requires that
I recurse through the XML tree, looking for an element "id" matching the
"parentId" from the addition command. This is somewhat cumbersome, and I
have as yet not created a working solution for this.
Still poking away at it, and taking suggestions.
Regards,
Graham Weldon
Tim Hoff wrote:
> I would think that if you don't want to replicate the server-side
> logic, you could just refresh the XMLListCollection data (new call)
> after the insertion has occured. The binding would update the
> view. If you are using the view to allow an insertion point, you
> would have to use addChildAt().
>
> -TH
>
> --- In [email protected], Graham Weldon <[EMAIL PROTECTED]>
> wrote:
> >
> > Hi all,
> >
> > I'm messing with Cairngorm 2.0 beta, and Flex 2.0 beta 3. I've got
> a
> > <mx:Tree /> that contains a structured set of data. This data can
> be
> > subjected to an insert at any point. I have correctly setup the
> events,
> > commands and delegate to deal with the insertion, and I process
> the
> > logical insertion on the server side of this application without
> issues.
> > The trouble I am having now is the graphical insertion of the new
> item
> > into the existing model.
> >
> > Currently the data is XML based. The Tree is directly data bound
> to an
> > XMLListCollection object.
> >
> > One thought I had was to model the entire tree as ValueObjects, so
> that
> > I could traverse the tree and 'addChild()' where necessary, but
> this
> > would be a complete replication of my Server-Side java code on the
> > client side, just for insertion. Additionally, I am not sure how i
> would
> > use a complex set of chained Value Objects as a data source for a
> Tree
> > GUI component.
> >
> > Any information about this would be really helpful. I appreciate
> any advice.
> >
> > I can display the tree correctly, I can use information from the
> > selected item to perform operations etc. I am interested in
> inserting a
> > new item at a specified location. For example, a request to insert
> an
> > item will result in XML data describing the insert:
> >
> > Regards,
> > Graham Weldon.
> >
> >
> >
> > ========
> > XML Tree INSERTION data Sample
> > --------
> >
> > <command action="" success="true">
> > <addTreeItem parent="123">
> > <element label="NEWitem" id="9999"/>
> > </addTreeItem>
> > <addTreeItem parent="380">
> > <element label="deepItem" id="12"/>
> > </addTreeItem>
> > </command>
> >
> > ========
> >
> >
> > ========
> > XML Tree Data Sample
> > --------
> >
> > <tree>
> > <element label="one" id="123"/>
> > <element label="two" id="122"/>
> > <element label="eight" id="897">
> > <element label="hello" id="113"/>
> > <element label="world" id="198">
> > <element label="thing" id="380"/>
> > </element>
> > </element>
> > </tree>
> >
> > ========
> >
> >
> > ========
> > ModelLocator
> > --------
> > ... snip ...
> >
> > public var myTreeData : XMLListCollection = new XMLListCollection
> ();
> >
> > ... snip ...
> > ========
> >
> >
> > ========
> > Application.mxml
> > --------
> > ... snip ...
> >
> > <myComponents:TreeComponent
> > dataProvider="{ModelLocator.myTreeData}"/>
> >
> > ... snip ...
> > ========
> >
>
>
>
>
>
>
>
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