Re: [flexcoders] BindingWatcher and XML

Daniel Freiman Wed, 08 Nov 2006 08:11:51 -0800

You are supposed to use the XMLListCollection class which broadcasts events. There isn't a way to bind or listen directly to an XML or XMLList object without using XMLWatcher, XMLNotifier or IXMLNotifiable which are all not documented.

- Dan

On 11/7/06, tobiaspatton <[EMAIL PROTECTED]> wrote:

Hello list;

Is there way to use the BindingWatcher class to detect changes to
nodes in an XML object? So far, I've not been able to get this to
work.

I've looked at the compiler-generated code that implements this sort
of binding for MXML files, but it uses classes like XMLWatcher that
are in the mx:internal namespace. I understand that developers are
not meant to use these classes.

Thanks.
Tobias.

Here's the code I'm using for my tests:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
        creationComplete="OnCreationComplete()">

        <mx:Script>
                <![CDATA[
                        import mx.binding.utils.ChangeWatcher;

                        private function OnCreationComplete() : void
                        {
                                _watcher = ChangeWatcher.watch(
this, [ "x1", "leaf[ 0 ]" ], OnChange );
                                trace( _watcher.isWatching() );
                        }

                        private  function OnChange( change :
Object ) : void
                        {
                                trace( "Change" );
                        }

                        private var _watcher : ChangeWatcher;
                ]]>
        </mx:Script>

        <mx:HBox>
                <mx:Label id="l1" text="{x1.leaf [ 0 ]}"/>
                <mx:TextInput id="ti1"/>
                <mx:Button label="Change" click="x1.leaf[ 0 ] =
ti1.text"/>
        </mx:HBox>

        <mx:XML id="x1" format="e4x" xmlns="">
                <root>
                        <leaf>Initial Value 0</leaf>
                        <group1>
                                <leaf>Initial Value</leaf>
                                <leaf>Initial Value 2</leaf>
                        </group1>
                </root>
        </mx:XML>
</mx:Application>

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Re: [flexcoders] BindingWatcher and XML

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