AW: AW: AW: Getting data from a callback

> Hi David.
>
> Thanks you're right. I assumed something like that before but placed the setTimeout in the wrong order.
>
> var callMetaData = {
>   callback: someObject.callbackFunction,
>   scope: someObject,
>   timeout: 1000
> };
>
> Remote.getReasons(callMetaData);
>
> var nothing = function() { alert(someObject.privateVar);  }
> window.setTimeout(nothing, 1000);
>
>
> Works. I found no other way to determine if my callback has returned but this should work as a start since I load all data only once.
>
> Thanks again.
> David
>
> -----Ursprüngliche Nachricht-----
> Von: david@... [mailto:david@...]
> Gesendet: Mittwoch, 23. April 2008 19:15
> An: users@...
> Betreff: RE: AW: [dwr-user] Getting data from a callback
>
> David,
>   DWR makes asynchronous calls.  
>
> Remote.doSomething(callMetaData);
> alert(someObject.privateVar); // "Private variable from hell" which I want
> to be Hello
>
> someObject.privateVar is going to be "Private variable from hell" until the
> remote call has been executed and returned, thus the callback function.
> Because this call is asynchronous my guess is that your alert (the one
> following your remote call) is being displayed before the call has
> completed.
>
>
> Original Message:
> -----------------
> From:  David.Luecke@...
> Date: Wed, 23 Apr 2008 18:48:35 +0200
> To: users@...
> Subject: AW: [dwr-user] Getting data  from a callback
>
>
> Hi David.
>
> Thanks for your reply. I read the page a few times before because I thought
> it a scoping issue, too (in Java you can overwrite member variables with
> local variables, too).
> I now switched to 3.0M1 and got the example working but it's the same issue
> again (probably I'm doing something terribly wrong...):
>
> (function() {
> someObject = {};
> someObject.privateVar = "Private variable from hell";
>
> someObject.callbackFunction = function(dataFromServer)
> {
> this.privateVar = "Hello world";
> alert(this.privateVar); // "Hello world"
> }  
> })();
>
> var callMetaData = {
>   callback: someObject.callbackFunction,
>   scope: someObject
> };
>
> Remote.doSomething(callMetaData);
>
> alert(someObject.privateVar); // "Private variable from hell" which I want
> to be "Hello world" oder dataFromServer or whatever
>
>
> Do I have to use another scope?
>
> Greetings
> David
>
> -----Ursprüngliche Nachricht-----
> Von: david@... [mailto:david@...]
> Gesendet: Mittwoch, 23. April 2008 17:22
> An: users@...
> Betreff: RE: [dwr-user] Getting data from a callback
>
> This is a scoping issue.  Please read this:
> http://getahead.org/dwr/browser/extradata
>
>
> Original Message:
> -----------------
> From:  David.Luecke@...
> Date: Wed, 23 Apr 2008 17:14:09 +0200
> To: users@...
> Subject: [dwr-user] Getting data  from a callback
>
>
> Hi.
>
>  
>
> I'm quite new to DWR and I really like it, but I think I have a problem
> with the JavaScript part ;)
>
> How can I get the return values of a callback into JavaScript "global"
> variables?
>
> I can read variables in the callback function but cannot modify them.
>
>  
>
> E.g.:
>
>  
>
> {
>
> this.test = "Hello";
>
> var obj = this;
>
>  
>
> var callbackfunc = function(arg)
>
>             {
>
>                         alert(obj.test); // alerts "Hello"
>
>                                     obj.test = "Test";
>
>                                    // or obj.test = arg;
>
>                                     alert(obj.test); // alerts "Test"
>
>             }
>
>  
>
> Remote.doSomething(callbackfunc);
>
>  
>
> alert(obj.test); // alerts Hello
>
> }
>
>  
>
>  
>
> Will always alert "Hello" and I don't understand why
>
> or how I could get at the return values from the outside at all.
>
>  
>
> Thanks a lot in advance
>
> Regards
>
> David
>
>
>
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