IMHO anonymous functions are way more trouble than they are worth. If I had
the time, I would eliminate them from all framework code.
Looks from the stacktrace that someone is using apply() to change the this
pointer.
On 9/22/11 10:46 AM, "grimmwerks" <gr...@grimmwerks.com> wrote:
Not getting an error, just getting ignored and the function is never called.
var scope:Object = this;
private var echoOrderCacheEvent:Function = function(jstr:String):void{
Alert.show(this);
trace(scope);
}
I've tried the old pass through - but it's definitely not working properly; the
'this' that's getting called within the function is NOT the function - it's a
SubscriptionListener in the stomp framework as that's what's calling the
callback through the interface; something another dev has created and just want
to come back with enough ammunition that the callbacks aren't being set
properly:
It seems to me that he's creating another anonymous function as part of the
stomp dispatching and then everything is getting lost:
ReferenceError: Error #1069: Property com.investlab.mix.common.model::scope not
found on interbahn.SubscriptionListener and there is no default value.
at
Function/<anonymous>()[/Users/grimm/Documents/__WORK/__INVESTLAB/MIX/src/com/investlab/mix/common/model/OrderProxyNew.as:142]
at
interbahn::SubscriptionListener/apply()[C:\transfer\IdeaProjects\as3-interbahn\main\as3\src\interbahn\SubscriptionListener.as:59]
at
Function/<anonymous>()[C:\transfer\IdeaProjects\as3-interbahn\main\as3\src\interbahn\stomp\StompConnection.as:35]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at
org.codehaus.stomp::Stomp/dispatchFrame()[/Users/grimm/Documents/__WORK/__INVESTLAB/MIX/src/org/codehaus/stomp/Stomp.as:350]
at
org.codehaus.stomp::Stomp/processFrame()[/Users/grimm/Documents/__WORK/__INVESTLAB/MIX/src/org/codehaus/stomp/Stomp.as:326]
at
org.codehaus.stomp::Stomp/onData()[/Users/grimm/Documents/__WORK/__INVESTLAB/MIX/src/org/codehaus/stomp/Stomp.as:312]
On Sep 22, 2011, at 1:32 PM, Alex Harui wrote:
I don’t know why passing in echoEvent wouldn’t work. What error did you get?
Another options are to pass in a third parameter as the object for use in call
or apply.
You can theoretically do this as well in the constructor of the class:
Public function MyClassConstructor()
{
var thisObject:Object = this;
echoOrderCacheEvent = function(jstr:String):void{
trace(thisObject); // use ‘thisObject’ instead of ‘this’
}
}
On 9/22/11 9:50 AM, "grimmwerks" <gr...@grimmwerks.com> wrote:
OK I don't mean to make this a bit convoluted - but I guess the basics of the
question is regarding using anonymous functions within a member class and being
able to set variables within that member class.
The convoluted question is this: I've got in my app an Interface class that
has pointers to scala/java functions and are passed in callbacks like so:
function echoOrderEvent(callback:Function):void ;
[UriParams(p1="correlationId")]
function echoOrderCacheEvent(callback:Function,extension:Object):void ;
&n! bsp;
Now in my class I create vars as functions for callbacks like so:
private var echoOrderCacheEvent:Function = function(jstr:String):void{
Alert.show("GOT ORDER EVENT ");
}
I set up the call back to this function as such:
interfaceClass.echoOrderCacheEvent(echoOrderCacheEvent, {correlationId:
sessionId});
!
! ;
Now, this works great except in the anonymous function I don't have any access
to the public or private member vars of the class - only of course if I make
the vars static, which is not what I want to do.
What I *can't* figure out is how to make the callback a regular member function
such as:
public function echoEvent(str:String):void{
blah blah
}
And have that work with the interface class -- as
interfaceClass.echoOrderCacheEvent(echoEvent, {correlationId: sessionId}) won't
work; what I was thinking was perhaps .call or .apply methods but not sure how
best to use them here...
Garry Schafer
grimmwerks
gr...@grimmwerks.com
portfolio: www.grimmwerks.com/ <http://www.grimmwerks.com/>
<http://www.grimmwerks.com/>
--
Alex Harui
Flex SDK Team
Adobe System, Inc.
http://blogs.adobe.com/aharui
