You may want to check OpenRICO - http://openrico.org
Cheers,
On 8/19/05, David Durham <[EMAIL PROTECTED]> wrote:
> Hi --
>
> There's been some traffic on this list involving XMLHttpRequests and
> javascript, and since it's Friday ...
>
> My problem: How to use multiple asynchronous requests simultaneously
> without using the global namespace. For instance, I'd like to create a
> little DirectoryTree widget that I can drop in pages like so:
>
> <script type="text/javascript">
> new DirectoryTree("some_directory_name");
> </script>
>
> Ideally, I could drop as many of these widgets on the page as I want.
>
> Then I have some javascript like so:
>
> DirectoryTree = function(directory, url) {
> //setup
> ...
> execute(url, DefaultCallback);
> }
>
> Here's an execute method that supposed to trigger some kind of action:
>
> execute(url, callback) {
> var cb = new callback();
> cb.request = new XMLHttpRequest();
> cb.request.onreadystatechange = callback.processResponse;
> cb.request.open(this.METHOD, url, this.ASYNC);
> cb.request.send(null);
> }
>
> DefaultCallback = function() {
> this.request = null;
>
> function processResponse() {
> log.info("decorating: " + this.request);
> }
> }
>
>
> The processResponse() method alerts: "decorating: undefined". I even
> tried:
>
> DefaultCallback = function() {
> this.request = null;
> }
>
> DefaultCallback.processResponse = function() {
> log.info("decorating: " + this.request);
> }
>
> and got the same result.
>
> I'm somewhat experienced with Javascript and it's OO concepts and event
> handling, but not terribly so. I think what's happening here is that on
> readystate change triggers the creation of a new
> 'DefaultCallback.processResponse' object and therefore a new scope with
> no concept of the 'var cb = new callback()' scope. Therefore, in order
> to get at the xmlrequest/response, I need to go through the global
> namespace or some other static-like namespace, which I don't really want
> to do because I'd like to avoid managing, say a queue of xml http
> requests. I haven't looked through the xml http request stuff that was
> posted to struts sandbox (I think it's in sandbox, not really sure), but
> does anyone have ideas on this one, or can point me to some code or info
> with solution(s)?
>
>
> - Dave
>
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