Remember, functions are objects to (so you can treat them like fancy
functors in C++):
var functor:Function = function(arg:String):String { return arg +
functor["param"]; }
functor["param"] = "dolly";
trace(functor("hello"); // outputs "hellodolly"
or, for events:
var myEventHandler:Function = function(event:MouseEvent):void {
trace(myEventHandler["extraData"]); }
myEventHandler["extraData"] = "hellodolly";
this.stage.addEventListener(MouseEvent.CLICK, myEventHandler);
// when you click on the stage, you'll get the debug message "hellodolly"
This'll give you what you're looking for. Not sure what the best way to copy
a "functor" object would be... but you could definitely just create a new,
separately named Function object for each form item that wraps your
function, passing in the the "extraData".
Troy.
On 2/14/07, Gordon Smith <[EMAIL PROTECTED]> wrote:
Here's an example of what I meant:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";>
<mx:Script>
<![CDATA[
private var foo:int = 7;
private function clickHandler(event:MouseEvent):void
{
trace(foo);
}
]]>
</mx:Script>
<mx:Button click="clickHandler(event)"/>
</mx:Application>
Note that the Button's clickHandler() can access the instance variable
'foo', despite the fact that 'foo' isn't passed to clickHandler() and 'foo'
isn't a property of event.target, which is the Button.
The reason that clickHandler() can access 'foo' is that when
clickHandler() executes, 'this' is the Application (or whatever component
you're writing).
- Gordon
------------------------------
*From:* [email protected] [mailto:[EMAIL PROTECTED] *On
Behalf Of *darylgmyers
*Sent:* Wednesday, February 14, 2007 7:42 AM
*To:* [email protected]
*Subject:* [flexcoders] Re: addEventListener and additional arguments?
Gordon,
I'm pretty new to Flex so I appologize for the additional question.
Are you saying that I can add an instance property to the target so
that it will be available in the event.target? What I'm actually
doing is creating a set of form fields on the fly using action
script. Some of these fields may be number types with a precision
value. My formatting is done with an event listener which I need to
be able to pass the precision value.
--- In [email protected] <flexcoders%40yahoogroups.com>, "Gordon
Smith" <[EMAIL PROTECTED]> wrote:
>
> There should be no need to pass additional arguments to the event
> handler method, because -- assuming it is indeed a method of a
class --
> it can access all the instance properties of that class. So just
set an
> instance property.
>
> - Gordon
>
> ________________________________
>
> From: [email protected] <flexcoders%40yahoogroups.com>
[mailto:[email protected] <flexcoders%40yahoogroups.com>] On
> Behalf Of darylgmyers
> Sent: Tuesday, February 13, 2007 1:42 PM
> To: [email protected] <flexcoders%40yahoogroups.com>
> Subject: [flexcoders] addEventListener and additional arguments?
>
>
>
> Is there a way to use the addEventListener method and pass
additional
> arguments along with the event? I have a form where I must create
the
> form objects dynamically so I need to use addEventListener for
> formatting, etc. I can not use inline mxml to add the listeners.
>
