You can also bind your function. So where this won't work:
this.rpc.callAsync(this._handleResult);
You can do this:
this.rpc.callAsync(qx.lang.Function.bind(this._handleResult, this));
That should help keep your code tidy :)
Matt
JB wrote:
> Thanks, I got it. I am familiar with them from the LISP and Scheme
> languages but I was not familiar with the scoping rules in javascript.
> In the function that calls this.rpc.callAsync I create local variable
> with a value of this.selectBoxControl like so:
>
> var selBox = this.selectBoxControl;
> this.rpcRef = this.rpc.callAsync(function(result, ex, id) {
> if (ex == null) {
> selBox.removeAll();
> // whatever else to do on success
> } else {
> // handle exception code
> }
> }
>
>
>
> Derrell Lipman wrote:
>> On Sat, Oct 24, 2009 at 03:10, JB <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Thanks!!! That did the trick. However, I think I might have found
>> a case
>> where that does not work so well. The button event listeners work
>> great!
>> But I also have an RPC callback as well and there are an arbitrary
>> number of arguments to callAsync that are passed to the remote
>> procedure. Simply passing in 'this' as the last argument doesn't
>> seem to
>> quite work. So how can I make this work with rpc.callAsync?
>>
>> When it's not feasible to retain the values that you need to work with
>> in the object associated with 'this' in the handler (which is the case
>> for rpc), you can use JavaScript closures. If you're not familiar with
>> closures, study it and if you still have questions, ask questions
>> here. They are very powerful and highly useful for this sort of thing.
>>
>> Cheers,
>>
>> Derrell
>>
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developing skills, take BlackBerry mobile applications to market and stay
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