Thanks a lot!!!!
On Sat, May 3, 2008 at 3:08 PM, Jim Hayes <[EMAIL PROTECTED]> wrote:
>
>
>
>
>
>
>
> Apologies, both were additions/modifications to the code that you posted.
>
> So, add
>
>
> this.dispatchEvent(new Event("LoadTextFile.dataloaded"));
>
> to the end of method "onCompleteTextLoad" in your LoadTextFile class,
>
> and " extends EventDispatcher" to it's definition, to make :
>
> "public class LoadTextFile extends EventDispatcher"
>
> (You'll also need to include EventDispatcher in that class)
>
> It will then dispatch an event when the data is ready.
>
> The second bit was just modifications to your "controller" class example
> code, in other words adding an event listener to an instance of
> LoadTextFile,
> and providing a function that gets called when the event occurs(at which
> point the data is available, before that it will be null, as you found).
>
>
> -----Original Message-----
> From: [email protected] on behalf of dnk
>
> Sent: Sat 03/05/2008 21:59
> To: [email protected]
> Subject: Re: [flexcoders] Why would this assignment to a MVC model return
> null?
>
> and which file it should be in, etc....
>
> On Sat, May 3, 2008 at 1:51 PM, dnk <[EMAIL PROTECTED]> wrote:
> > Ok, just trying to look through the code sample provided.... a little
> > confused due to my old code still being in there.....
> >
> >
> >
> >
> > On Sat, May 3, 2008 at 12:55 PM, Jim Hayes <[EMAIL PROTECTED]>
> wrote:
> > >
> > >
> > >
> > >
> > >
> > >
> > > It's because the loading of the text file is asynchronous, and in your
> > > example
> > >
> > >
> > > var myTxt2:LoadTextFile = new LoadTextFile("file2.txt");
> > > // populate my model with the results
> > > myprojectmodel.getInstance().mytext2 = myTxt2.data;
> > >
> > > you access it's data variable immediately after instructing it to load
> the
> > > text.
> > >
> > > Instead, you need to wait until that load is done before accessing
> data.
> > > I'd probably get the loadtextFile class to raise an event when that
> > > happens, have your main app listen for it.
> > >
> > >
> > > public function onCompleteTextLoad(e:Event):void
> > > {
> > > var vars:URLVariables = new URLVariables(e.target.data);
> > > trace("LOOK HERE: " + vars.thetext);
> > > this._mydata = vars.thetext;
> > > trace("from mydata: " + this._mydata);
> > >
> > > // If below added, the model is populated
> > > // myprojectmodel.getInstance().mytext2 = vars.thetext;
> > >
> > > this.dispatchEvent(new Event("LoadTextFile.dataloaded"));
> > >
> > >
> > > var myTxt2:LoadTextFile = new LoadTextFile("file2.txt");
> > > // populate my model with the results
> > > //myprojectmodel.getInstance().mytext2 = myTxt2.data;
> > > myTxt2.addEventListener("LoadTextFile.dataloaded", gotData)
> > >
> > > private function gotData(event:Event):void
> > > {
> > > var myTxt2:LoadTextFile = LoadTextFile(event.target)
> > >
> > > myprojectmodel.getInstance().mytext2 = myTxt2.data;
> > > myTxt2.removeEventListener("LoadTextFile.dataloaded", gotData);
> > > }
> > >
> > > LoadTextFile will have to extend EventDispatcher.
> > >
> > > HTH ! (been there myself, when I started!)
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: [email protected] on behalf of dnk
> > > Sent: Sat 03/05/2008 20:22
> > > To: flexcoders list
> > > Subject: [flexcoders] Why would this assignment to a MVC model return
> null?
> > >
> > > Ok, I am using a easymvc structure (tom bray version), and i have run
> > > into an issue that is killing me!
> > >
> > > I am simply loading in some vars from a text file, and to do so i
> > > wrote a utility class (to make it reusable).
> > >
> > > Now in my class, if I populate my model var, it works fine. But it
> > > makes that class not very reusable.
> > >
> > > So I added a var to store the result, and made a getter method.
> > >
> > > Now in my utility class it looks like this:
> > >
> > > package myproject.util
> > > {
> > > // for text loading
> > > import flash.events.*;
> > > import flash.net.*;
> > >
> > > public class LoadTextFile
> > > {
> > >
> > > private var _mydata:String;
> > >
> > > public function LoadTextFile(myFile:String)
> > > {
> > > var req:URLRequest = new URLRequest(myFile);
> > > var url_loader:URLLoader = new URLLoader(req);
> > > url_loader.addEventListener(Event.COMPLETE, onCompleteTextLoad);
> > > url_loader.addEventListener(IOErrorEvent.IO_ERROR, onErrorTextLoad);
> > > //trace("called in loadTxtFile: " + myFile);
> > > }
> > >
> > > public function onCompleteTextLoad(e:Event):void
> > > {
> > > var vars:URLVariables = new URLVariables(e.target.data);
> > > trace("LOOK HERE: " + vars.thetext);
> > > this._mydata = vars.thetext;
> > > trace("from mydata: " + this._mydata);
> > >
> > > // If below added, the model is populated
> > > // myprojectmodel.getInstance().mytext2 = vars.thetext;
> > >
> > > }
> > >
> > > public function onErrorTextLoad(e:IOErrorEvent):void
> > > {
> > > trace("Something wrong! Could not load file.");
> > > }
> > >
> > > public function get data():String
> > > {
> > > return this._mydata;
> > > }
> > >
> > > }
> > > }
> > >
> > > The traces in the class come back with the proper data. So the _mydata
> > > var is populated.
> > >
> > > Now from my controller: I would have a function that contained
> > > something like this:
> > >
> > > // new instance
> > > var myTxt:LoadTextFile = new LoadTextFile("file.txt");
> > > // populate my model with the results
> > > myprojectmodel.getInstance().mytext = myTxt.data;
> > >
> > > // another instance
> > > var myTxt2:LoadTextFile = new LoadTextFile("file2.txt");
> > > // populate my model with the results
> > > myprojectmodel.getInstance().mytext2 = myTxt2.data;
> > >
> > > trace("From Data in controller using getter: " + myTxt.data);
> > >
> > > And this trace comes back null! WHich means it obviously never
> > > populates my model.
> > >
> > > Why would this happen?
> > >
> > > It seems to be pretty basic code. But I am driving myself insane!!!!
> > >
> > > DNK
> > >
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