Re: [flexcoders] Dispatching an Event from a Class

[Sam Shrefler]

Mike, I'm interested in why you would dispatch an Event from your
modelLocator?  Could you please share?

Also, could this be a case where the Observe tag could help you?

http://weblogs.macromedia.com/paulw/archives/2006/05/the_worlds_smal.cfm

Thanks

Sam

On 1/9/07, Mike Anderson <[EMAIL PROTECTED]> wrote:

   Yes, I understand this -

But what about a generic class, that does NOT extend any other classes
(which have the IEventDispatcher as part of their makeup)

In my generic class (in this case, my ModelLocater which is part of a
Cairngorm-based application), it doesn't natively have anything in there
which includes the EventDispatcher stuff.

So, I wanted to see what the bare minimum requirements would be, in order
to Dispatch an Event from a Class File that doesn't "extend" or "implement"
anything else.

Also, I DO have the [Bindable] Metatag on this class, and even know I
don't get any code-hinting whenever I type any "dispatchEvent" type code, I
don't get any Compiler Errors either...  That struck me as odd, but with
what Tracy just mentioned, it does answer a few questions...

So I guess, the [Bindable] Metatag is a quick way to add this
functionality, but I am just curious if I wanted to accomplish this via some
other means.

Thanks for the info on this topic :)

Mike

 ------------------------------
*From:* flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] *On
Behalf Of *Sergey Kovalyov
*Sent:* Tuesday, January 09, 2007 1:28 PM
*To:* flexcoders@yahoogroups.com
*Subject:* Re: [flexcoders] Dispatching an Event from a Class


 Just call dispatchEvent() (e. g. dispatchEvent(new Event(Event.CHANGE)))
in any class that implements IEventDispatcher (e. g. all the EventDispatcher
successors). Note, that UIComponent and all its successors implement
IEventDispatcher, so dispatchEvent() could be called in any subclass of Box,
ComboBox, Label, TextArea, HSlider, etc:

package {

 import mx.controls.HSlider;

 public class MyHSlider extends HSlider {

  public function MyHSlider() {
   super();

   dispatchEvent(new Event("instanceConstructed"));
  }

 }

}
On 1/9/07, Mike Anderson <[EMAIL PROTECTED]> wrote:
>
>   Hello All,
>
> I am attempting to dispatch an Event from a generic Class File, and I
> guess I'm not doing it correctly.
>
> I was hoping, that I could simply do this:
>
> import mx.events.IEventDispatcher
>
> And then in my function, I could simply dispatch the event like this:
>
> IEventDispatcher.dispatchEvent( event );
>
> But it doesn't allow me to do this. In the meantime, I extended my
> Class to use the UIComponent, which automatically pulls in all the
> EventDispatcher stuff. Of course, it's silly for me to do this, since I
> really don't have a need to extend the UIComponent class.
>
> There must be a way, to import the proper Class, in order to simply
> dispatch events.
>
> Any advice?
>
> Thanks in advance for your help,
>
> Mike
>