Let's say you had:
var dp:XML = <top>
<item />
<item />
</top>
If you have:
<mx:DataGrid dataProvider="{dp.item}" />
>From a ComboBox renderer, .owner.dataProvider is an XMLListCollection,
.owner.dataProvider.source === dp.items
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of mark goldin
Sent: Saturday, December 22, 2007 3:46 PM
To: [email protected]
Subject: RE: [flexcoders] ComboBox ItemRenderer
Not sure I understand. I am using Flex 3 Beta.
I am trying to get DG's complete XML in Combo's change event but can't
find a way of doing this.
Alex Harui <[EMAIL PROTECTED]> wrote:
In one of the 2.0.1 hotfixes, we wired up .owner to the DG so
you don't have to implement IDropInLIR anymore.
If you pass in XML to the DG's dataProvider propert! y, it will
be wrapped in an XMLLIstCollection when you read it back.
________________________________
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of mark goldin
Sent: Saturday, December 22, 2007 9:46 AM
To: [email protected]
Subject: RE: [flexcoders] ComboBox ItemRenderer
Yes,
listData.owner does point to the DG in my change event handler.
But when I
trace(listData.owner.dataProvider) expecting to see an XML data
(and that's what I want) I get a compiling error, if I say proceed trace
will show DG but not its data. What am I doing wrong?
Tracy Spratt <[EMAIL PROTECTED]> wrote:
If a renderer implements the IDropInListItemRenderer
interface, and most controls, like ComboBox do, then it can access
listData() as Dominique's code shows.
Then, the listData.owner property does point to the DG.
Note the casting in Dominique's example.
Tracy
________________________________
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of mark goldin
Sent: Saturday, December 22, 2007 12:02 PM
To: [email protected]
Subject: RE: [flexcoders] ComboBox ItemRenderer
Is there anything available in set data that will point
to the whole DG, not just the current row?
Alex Harui <[EMAIL PROTECTED]> wrote:
I would update the backing .data too., but the
.owner property does point to the DG.
________________________________
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of Tracy Spratt
Sent: Friday, December 21, 2007 4:18 PM
To: [email protected]
Subject: RE: [flexcoders] ComboBox ItemRenderer
Do! minique's approach is the correct one.
The Flex framework calls the set data() method
on every renderer anytime the underlying data changes. This is because
renderers are recycled.
So your renderer always has a reference to the
dataProvider item that is behind it. Use that reference to update the
item.
Tracy
________________________________
size=2 width="100%" align=center tabIndex=-1>
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of mark goldin
Sent: Friday, December 21, 2007 1:14 PM
To: [email protected]
Subject: Re: [flexcoders] ComboBox ItemRenderer
No, that's not what I meant. I mean without
using any ids, names, and etc.
Something like other environments have: parent.
Why can't I after I got a reference to an
itemRenderer simply go up on an object chain to get to DG and then talk
to its dataProvider:
itemRenderer.parent.parent.gd.dataProvider
updating it with a new data from an
itemRenderer? am I completely off here?
Dominique Bessette - Halsema
<[EMAIL PROTECTED]> wrote:
you can talk to anything in your
parentApplication by doing
parentApplication.<whatever id name you
gave the dataprovider>
the variable parentApplication is a set
flex variable that get's all the da! ta in the main app.
On 12/21/07, mark goldin
<[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
&g! t; wrote :
Aha, I see. Let me make sure I
understand.
ownerData is defined in set method. That
means it's set as many times as many rows are in the DG, right? But why
can't I talk directly to the dataProvider of my DG? Or using a private
var is the direct way?
Dominique Bessette - Halsema !
<[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote:
ownerdata is a variable that is set to
the DG's row data.
ownerData = value as XML;
get's the row data. sorry i should have
commented it more
On 12/21/07, mark goldin
<[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote:
Not sure I understand about ownerData.
Is it a hard coded dataProvider name for DG? I am w! orking on a generic
solution, I can't use hard coded names. Sorry, if I am misunderstanding
your solution.
Dominique Bessette - Halsema
<[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote:
Here is the code for the itemRenderer
for a combobox i made. The dataProvider is xml.
<?xml! version="1.0" encoding="utf-8"?>
<mx:ComboBox
xmlns:mx="http://www.adobe.com/2006/mxml
<http://www.adobe.com/2006/mxml> " rowCount="2" labelField="@name"
dataProvider="{weemcStatus}" change="onSelectionChange(event)">
<mx:Script>
<![CDATA[
import mx.events.ListEvent;
import
mx.controls.dataGridClasses.DataGridListData;
import
mx.collections.XMLListCollection;
private var ownerData:XML;
//binds the xml row data to
the combobox and appends the weemcStatus
override public function set
data(value:Object):void
{
if(value){
ownerData = value as
XML;
if(ownerData.weemcStatus.toString() == "" ||
ownerData.weemcStatus.toString () == null){
var item:XML =
<weemcStatus>WILCO</weemcStatus>;
ownerData.appendChild(item.toXMLString());
}
}
}
override public function get
data():Object
{
return ownerData;
}
override public function
setFocus():void
{
super.setFocus();
open();
}
//get's the new status and
changes the xml status value
private function
onSelectionChange(e:ListEvent):void
{
if(selectedItem &&
ownerData){
var
col:DataGridListData = DataGridListData(listData);
var sname:String =
selectedItem.toString ();
if(ownerData.weemcStatus.toString() != "" ||
ownerData.weemcStatus.toString() != null){
ownerData.weemcStatus = sname;
}
else{
var item:XML =
<weemcStatus>{sname}</weemcStatus>;
ownerData.appendChild(item.toXMLString());
}
}
}
private var xmlStatus:XML =
<weemc>
<status>WILCO</status>
<status>CANTCO</status>
</weemc>;
[Bindable]
private var
weemcStatus:Array = (new XMLListCollection(
xmlStatus.status)).toArray();
]]>
</mx:Script>
</mx:ComboBox>
On 12/20/07, mark goldin
<[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote:
I am using a Combobox as an itemRenderer
for one of columns in a DG. I have managed to intercept "change" event
of the combobox. But what do I do to store new value from Combo into
DG's dataProvider for the following data save to the server?
What is an actual design pattern for
that?
Thanks much for help.
