Re: [flexcoders] Flex Function and Web Service ResultHandler Question

[Angelo Anolin]

Hi Tracy,

Thanks for the insight.

I think this is one big hurdle (and one which would prevent some developers 
from embracing Flex).

I am already getting used to Flex, but only for those which comprises of only 
single transactional call to the database.

I still can't think of a way like to get through this:

myFunction(evt:dragDrop)
{
  // Check if data passes validation.  If not, confirm from user if proceed
  Alert.show('Proceed?', '', Alert.Yes | Alert.No, alertHandler);
  
  // If Yes was pressed, then should do something here, else call the 
preventDefault
}


But since after the alert, the conditional script is executed on the alert 
Handler event, how would I be able to reference or make a call for 
evt.preventDefault which is only visible in the myFunction?

*Sigh*

I need to get over / hurdle this... 

Regards,

Angelo


________________________________
From: Tracy Spratt <tr...@nts3rd.com>
To: flexcoders@yahoogroups.com
Sent: Thursday, 27 August, 2009 14:45:16
Subject: RE: [flexcoders] Flex Function and Web Service ResultHandler Question

  
It is simply a different way of thinking. 
Whatever you need to do, you can do within the constraints of the 
async/non-blocking
coding paradigm.
 
This is a hurdle that almost all new Flex
developers must get over.
 
Tracy Spratt,
Lariat Services, development services
available

________________________________
 
From:flexcod...@yahoogro ups.com [mailto: flexcod...@yahoogro ups.com ] On 
Behalf Of Angelo Anolin
Sent: Wednesday, August 26, 2009
10:09 AM
To: flexcod...@yahoogro ups.com
Subject: Re: [flexcoders] Flex
Function and Web Service ResultHandler Question
 
  
Hi Tracy,

You mentioned that this is the only way...

But doesn't this kind of programming limits what the developer could actually
do?

I mean for example, you have coded in the dragDrop event of a list
control.  In the said event, you need to get some data through a web
service.  The whole operation is dependent on the event handler for the
dragdrop.  If you would only be allowed to process the operations further
in the result handler of the web service, how could you then utilize the event
which was the parameter in your dragdrop event?

I think this question also goes the same for the Alert.show function where the
result handler deviates from the function/event with which it was
executed.  If the continuation of execution would be on the Alert handler,
it would be quite tedious on the part of the developer to be able to gather the
variables/objects/ handlers from the original function/event.

I am pretty sure Adobe / Flex team has thought about this but I may be doing
things wrong.  So I would appreciate everyone's input.  I am in a
bind right now cause this limitation(? ) hampers me from being a lot more
productive with Flex.

Thanks.

Angelo
 

________________________________
 
From:Tracy Spratt
<tr...@nts3rd. com>
To: flexcod...@yahoogro ups.com
Sent: Wednesday, 26 August, 2009
12:55:18
Subject: RE: [flexcoders] Flex
Function and Web Service ResultHandler Question

  
You will have to initiate your “further
operations” from the result
handler.  There is no other way.
 
Tracy Spratt,
Lariat Services, development services available

________________________________
 
From:flexcod...@yahoogro ups.com [mailto:
flexcod...@yahoogro ups.com ] On Behalf Of Angelo
Anolin
Sent: Tuesday, August 25, 2009
9:54 PM
To: flexcod...@yahoogro ups.com
Subject: [flexcoders] Flex
Function and Web Service ResultHandler Question
 
  
Hi
FlexCoders,
 
Needing
your input on the following:
 
I
have created a function for the dragevent of a list.
 
Code
is as follows:
 
private
function myFunction(evt: DragEvent) :void
{
 var nameID:String = 'Angelo';
 
 // Call a webservice operation here
 ws.GetStatus( nameID);
 
 Alert.show(String( _xmlGetStatus) , 'myFunction' );
 
 // I need to use the _xmlGetStatus here...
 // But the _xmlGetStatus is NULL?
 // Although in the Result Handler, it is not NULL.
}
 
private
function getStatusResultHand ler(event: ResultEvent) :void
{
 _xmlGetStatus = XML(event.result) ;
 Alert.show(String( _xmlGetStatus) , 'getStatusResultHan dler');
}
 
The
result handler for the GetStatus web service operation populates an XML
variable which I declared on top of the script (i.e. private var _xmlGetStatus:
XML;).
 
When
I run my application, myFunction executes but the alert that is shown first is
the one in the function myFunction, instead of the one in the result handler.
 
I
need to use the values in the XML variable _xmlGetStatus for further operations
in function myFunction, but then the value is not populated right away.
 
Any
way to handle this?
 
Thanks
and regards,
Angelo