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Mike Marshall

2007-Sep-02 08:22 UTC

Possible Dumb Question

Hi all, first post so please be gentle.

I have the following javascript defined (cut down for legibility)
function ATKWidget()
{
	var m_Key;
	this.draw = draw;
	this.doDrawWidgetResponse = doDrawWidgetResponse;

	function draw()
	{
		//Issue the AJAX request
		var data = "output=json&key=" + this.m_Key;
		var myAjax = new Ajax.Request(this.m_ATKLocation + "/
getwidgetdata.php", {method: ''post'', parameters: data,
onComplete:
this.doDrawWidgetResponse});

	}

	function doDrawWidgetResponse(originalRequest)
	{
		alert(originalRequest.responseText);
		alert(this.m_Key);
	}
}

and in the doDrawWidgetResponse the this.m_Key is undefined (when it
should have a value in it.  Its certainly defined in the draw()
function  :)

Am I doing something wrong with the way I am calling the onComplete or
have I stuffed something else up.

The request responds correctly and I get what I am expecting in
originalRequest.responseText but it seems to be a new instance of
ATKWidget.

Thanks in advance for any help.

Mike Marshall
Lexalytics Inc.


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Bastian Feder

2007-Sep-02 08:40 UTC

head link

Re: Possible Dumb Question

hi,

I assume you use prototype as the AJAX framework and you get an error like:
''this has no properties''.

I had the same problem about half a year ago.
The solution is the "bind()" function:

 var myAjax = new Ajax.Request(this.m_ATKLocation + "/
getwidgetdata.php", {method: ''post'', parameters: data,
onComplete:
this.doDrawWidgetResponse.bind(this)});

hope this helps

Bastian

On 9/2/07, Mike Marshall
<myke.marshall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
>
> Hi all, first post so please be gentle.
>
> I have the following javascript defined (cut down for legibility)
> function ATKWidget()
> {
>         var m_Key;
>         this.draw = draw;
>         this.doDrawWidgetResponse = doDrawWidgetResponse;
>
>         function draw()
>         {
>                 //Issue the AJAX request
>                 var data = "output=json&key=" + this.m_Key;
>                 var myAjax = new Ajax.Request(this.m_ATKLocation + "/
> getwidgetdata.php", {method: ''post'', parameters:
data, onComplete:
> this.doDrawWidgetResponse});
>
>         }
>
>         function doDrawWidgetResponse(originalRequest)
>         {
>                 alert(originalRequest.responseText);
>                 alert(this.m_Key);
>         }
> }
>
> and in the doDrawWidgetResponse the this.m_Key is undefined (when it
> should have a value in it.  Its certainly defined in the draw()
> function  :)
>
> Am I doing something wrong with the way I am calling the onComplete or
> have I stuffed something else up.
>
> The request responds correctly and I get what I am expecting in
> originalRequest.responseText but it seems to be a new instance of
> ATKWidget.
>
> Thanks in advance for any help.
>
> Mike Marshall
> Lexalytics Inc.
>
>
> >
>

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Mike Marshall

2007-Sep-02 08:49 UTC

head link

Re: Possible Dumb Question

Curses, should have said I was using Prototype.

 

That works perfectly, thanks very much for the help.

 

Mike Marshall

Lexalytics Inc.

 

From: rubyonrails-spinoffs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
[mailto:rubyonrails-spinoffs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org] On Behalf
Of Bastian Feder
Sent: 02 September 2007 09:40
To: rubyonrails-spinoffs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
Subject: [Rails-spinoffs] Re: Possible Dumb Question

 

hi,

I assume you use prototype as the AJAX framework and you get an error like:
''this has no properties''.

I had the same problem about half a year ago. 
The solution is the "bind()" function: 

 var myAjax = new Ajax.Request(this.m_ATKLocation + "/
getwidgetdata.php", {method: ''post'', parameters: data,
onComplete:
this.doDrawWidgetResponse.bind(this)});

hope this helps

Bastian

On 9/2/07, Mike Marshall
<myke.marshall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:


Hi all, first post so please be gentle.

I have the following javascript defined (cut down for legibility)
function ATKWidget()
{
        var m_Key;
        this.draw = draw;
        this.doDrawWidgetResponse = doDrawWidgetResponse;

        function draw()
        {
                //Issue the AJAX request
                var data = "output=json&key=" + this.m_Key;
                var myAjax = new Ajax.Request(this.m_ATKLocation + "/
getwidgetdata.php", {method: ''post'', parameters: data,
onComplete:
this.doDrawWidgetResponse});

        }

        function doDrawWidgetResponse(originalRequest) 
        {
                alert(originalRequest.responseText);
                alert(this.m_Key);
        }
}

and in the doDrawWidgetResponse the this.m_Key is undefined (when it
should have a value in it.  Its certainly defined in the draw() 
function  :)

Am I doing something wrong with the way I am calling the onComplete or
have I stuffed something else up.

The request responds correctly and I get what I am expecting in
originalRequest.responseText but it seems to be a new instance of
ATKWidget.

Thanks in advance for any help.

Mike Marshall
Lexalytics Inc.




Join the Greater IBM  Connection
(http://www.xing.com/premiumgroup-6291.d26b7d)


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Rails spinoffs - Sep 2007 - Possible Dumb Question

Possible Dumb Question

Re: Possible Dumb Question

Re: Possible Dumb Question