ImageLoader.js
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/**
* Image Loader
* Reliably pre-loads images
*/
// var ImageLoader = function(src,element,cb){{{
var ImageLoader = function(src,element,cb){
this.src = src;
if (!element) element = new Image;
this.element = element;
this.callback = cb;
this.load();
};
// }}}
$.extend(ImageLoader,{
// attach: function(el,cb){{{
attach: function(el,cb){
return new ImageLoader(el.src,el,cb);
},
// }}}
// prototype: {{{
prototype: {
getDimensions: function(){
var el = this.element;
if (el.naturalWidth)
return [ el.naturalWidth, el. naturalHeight ];
if (el.width)
return [ el.width, el.height ];
return null;
},
fireCallback: function(){
this.element.onload = null;
if (typeof this.callback == 'function')
this.callback.apply(this,this.getDimensions());
},
isLoaded: function(){
return this.element.complete;
},
load: function(){
var t = this;
var el = t.element;
el.src = t.src;
if (t.isLoaded()) t.fireCallback();
else t.element.onload = function(e){
t.fireCallback();
};
}
}
// }}}
});
Jcrop.registerComponent('ImageLoader',ImageLoader);