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

Wed, 19 Oct 2005 05:23:05 -0700

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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