RE: [flexcoders] Is it the right way of using dispatchEvent?

Thu, 20 Oct 2005 21:05:13 -0700

Hi,
 
We declared a metadata before class defination. If compiler while parsing MXML code sees it, it generates the required actionscript code for you, which you had to do yourself in Flash.
 
Not sure, why isn't it workin for you? Can you post the code.
 
Any component extending UIComponent has event dispatching capablity.
 
Making components in Flex is much easier than making in Flash authoring.
 
 
-abdul

From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Ramu p
Sent: Tuesday, October 18, 2005 10:20 PM
To: [email protected]
Subject: Re: [flexcoders] Is it the right way of using dispatchEvent?

Hi Abdul,
Thanks a lot for giving breif description on "dispatchEvent".

One more doubt in this, we declared event before imprting specific classes.
Why is it so? I tried doing it in class, but not successfull.
What is the reason?

And at the same time, creating a pure UIComponent in Flasg is a bit different from that in FLex??
Dont we use addEventListener in flex?

Thanks a lot to one and all.

Regards,
Ram



On 10/19/05, Abdul Qabiz <[EMAIL PROTECTED]> wrote:
Look at the following code to figure out what you need to do:-
 

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx=" http://www.macromedia.com/2003/mxml" xmlns="*">
 <mx:Script>
      <![CDATA[
         function fun(){
            mx.controls.Alert.show("Event dispatched!")
         }
      ]]>
 </mx:Script>
<circle xmlns:circle="*" cirPress="fun() "/>

</mx:Application>

 
 
// ActionScript Document
[Event("cirPress")]
import mx.core.UIComponent
class circle extends UIComponent
{
  [Embed(source="cir_sym.swf",symbol="cir_sym")]
  var cir_sym:String;
  
  var obj:Object
 
  function circle()
 {
  }
  
  function init():Void{
   super.init();
  }
  function draw():Void{
   super.draw();
  }
  
  function createChildren():Void{
   obj = attachMovie("cir_sym","cir_sym",1);
  } 
  
  
  function onPress():Void{
    dispatchEvent({type:"cirPress"})
  }
  
   
  
}

From: [email protected] [mailto: [email protected]] On Behalf Of Ramu p
Sent: Tuesday, October 18, 2005 4:32 AM
To: [email protected]
Subject: [flexcoders] Is it the right way of using dispatchEvent?

 
Hi Flex coders,
 
Thanks a lot to all group people for solving my problem on "Issue on Accordion reference".
 
I am stuck up with one more problem.
 
Here is the problem,
 
I have a simple mxml file which uses a component(circle.as) , extends UIComponent.
OnPress of this circle I want to invoke a method that user has provided.
i.e, I included "circle" component in my xmxl in the following way.
 
<circle xmlns:circle="*" cirPress="fun"/>
 
So here "circle" is an as component which has cirPress event which has to invoke fun method in mxml file.
 
Here is the code of mxml file:
//**************************************************************************

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx=" http://www.macromedia.com/2003/mxml" xmlns="*">
 <mx:Script>
      <![CDATA[
         function fun(){
            mx.controls.Alert.show("Event dispatched!")
         }
      ]]>
 </mx:Script>
<circle xmlns:circle="*" cirPress="fun"/>

</mx:Application>

//**************************************************************************

Here is component (circle.as)

//**************************************************************************

// ActionScript Document
import mx.core.UIComponent
import mx.utils.Delegate
import mx.events.*
class circle extends UIComponent{
  public var dispatchEvent:Function
  
  [Embed(source="cir_sym.swf",symbol="cir_sym")]
  var cir_sym:String;
  
  var obj:Object
  var cirPress
  
  function circle(){
  }
  
  function init():Void{
   super.init();
   EventDispatcher.initialize(this);
  }
  function draw():Void{
   super.draw();
  }
  
  function createChildren():Void{
   obj = attachMovie("cir_sym","cir_sym",1);
   addEventListener("cirPressed",Delegate.create(this,tempFun))
  }
  
  function tempFun(){
   eval("_root."+cirPress).call()
  }
  
  function onPress():Void{
    dispatchEvent({type:"cirPressed"})
  }
  
   
  
}

//**************************************************************************

 

Here the above works well!!!
But problem is I shouldnt use "_root." to invoke the method! (coz method my be in a class/somewhere. So everytime method may not be in root)
 
 
And please suggest me, is it the right way of using dispatchEvent()?
I really appreciate one's help on "how to use dispatchEvent in appropriate way".
 
Thanks in advance!
 
Regards,
Ramu
 
 


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