Thanks for the reply. I think that's possible and I'll check it out,
but I wanted to post a little more code. The example I gave was perhaps
too simplified.
Here's the line that is called in the <initialization> block:
var cropper = new Cropper.Picture('${imageId}', options);
and here's the constructor from the cropper.js file:
Cropper.Picture.prototype = {
initialize: function(element, options) {
this.options = options || {handle: 'handle'};
this.picture = $(element);
this.picContainer = this.picture.parentNode.parentNode;
this.picContainer.style.cursor = "crosshair";
this.dragging = false;
Event.observe(this.picture, "load",
this.onLoad.bindAsEventListener(this));
},
onLoad: function(event){
alert("I've been called!");
},
I would think that in the context of the initialize function in the
prototype that the "this" would be referring to the correct thing.
-----Original Message-----
From: Jesse Kuhnert [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 16, 2007 4:42 PM
To: Tapestry users
Subject: Re: script initializtion calls and event binding
The context of "this" is probably what is breaking. That particular
keyword is deceptively similar to java this but much more specific.
in a block like :
dojo.addOnLoad(function(){
});
"this" refers to the closest containing object. In this case that
would be the anonymous function(){} object. If you want to bind to
something like the window being loaded reference
window.onLoad.bindAs.... If it's the document you want to do it on do
document.onLoad.bindAs<blah bah> ...Etc.. etc..
On 1/16/07, Chris Norris <[EMAIL PROTECTED]> wrote:
> Please bear with me though this explanation. We have some code that
is
> broken, I believe, by the inclusion of all script initialization code
in
> a dojo.addOnLoad call.
>
> The code this is being broken is a call to Scriptaculous'
Event.observe:
> Event.observe(this.picture, "load",
> this.onLoad.bindAsEventListener(this));
>
> Even after this.picture loads, the this.onLoad function is never
called.
> If, however, we take this code out of an <initialize> block in a
script
> file and just include it in the html template in a normal Javascript
> block, it works fine. Something about dojo.addOnLoad is breaking the
> Scriptaculous Event handling. Has anyone ran into anything like this?
> If I didn't make the problem clear, let me know.
>
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>
--
Jesse Kuhnert
Tapestry/Dojo team member/developer
Open source based consulting work centered around
dojo/tapestry/tacos/hivemind. http://blog.opencomponentry.com
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