RE: [flexcoders] [ChangeEvent()] and binding

Andora, Greg Fri, 01 Apr 2005 11:51:36 -0800

Title: Message

That did it, thanks a lot.

Greg Andora

-----Original Message-----
From: Ashish Goyal [mailto:[EMAIL PROTECTED]
Sent: Friday, April 01, 2005 11:35 AM
To: '[email protected]'
Subject: RE: [flexcoders] [ChangeEvent()] and binding

Hi Greg,

The problem is you are not dispatching the "myVar_changed" event. Add this line in your setter function and it should work.

dispatchEvent({type: "myVar_changed"});

Alternately, you can remove the whole ChangeEvent code and let Flex compiler do the work for you. Your MXML component code will look like:

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.macromedia.com/2003/mxml">
        <mx:Script>
        <![CDATA[

                var myVar : String;

        ]]>
        </mx:Script>
        <mx:TextInput id="thisText" change="myVar=thisText.text;" />
</mx:Canvas>

Thanks

-Ashish

From: Andora, Greg [mailto:[EMAIL PROTECTED]
Sent: Friday, April 01, 2005 11:05 AM
To: '[email protected]'
Subject: [flexcoders] [ChangeEvent()] and binding

Hi all,

I'm trying to expose a property of a custom component to be available for binding and can't seem to get it tor work. Below is the code for a very basic example of what I'm trying to do.

I have a property (myVar) whose changes are triggered by something inside of the custom component. The problem is, the changes to the property aren't being broadcast to the page using the component so that the bindings in the page are updated.


<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml" xmlns:cc="*">
        <mx:Script>
        <![CDATA[
                import mx.controls.Alert;
        ]]>
        </mx:Script>
        
        <cc:test id="testInput" />
        
        <mx:Button click="Alert.show(testInput.myVar)" />
        
        <mx:Label text="{testInput.myVar}" />
</mx:Application>


<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.macromedia.com/2003/mxml">
        <mx:Script>
        <![CDATA[
                import mx.controls.Alert;
                private var _myVar : String;

                [ChangeEvent("myVar_changed")]
                public function get myVar() : String
                {
                        return _myVar;
                }
                public function set myVar(newVal : String) : Void
                {
                        _myVar = newVal;
                }
        ]]>
        </mx:Script>
        <mx:TextInput id="thisText" change="myVar=thisText.text;" />
</mx:Canvas>

Thank you,
Greg Andora

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RE: [flexcoders] [ChangeEvent()] and binding

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