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43 lines
839 B
43 lines
839 B
/**
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* @class Images
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* This class loads images and keeps them stored.
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*/
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function Images() {
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this.images = {};
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this.callback = undefined;
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}
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/**
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* Set an onload callback function. This will be called each time an image
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* is loaded
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* @param {function} callback
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*/
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Images.prototype.setOnloadCallback = function(callback) {
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this.callback = callback;
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};
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/**
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*
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* @param {string} url Url of the image
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* @return {Image} img The image object
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*/
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Images.prototype.load = function(url) {
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var img = this.images[url];
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if (img == undefined) {
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// create the image
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var images = this;
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img = new Image();
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this.images[url] = img;
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img.onload = function() {
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if (images.callback) {
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images.callback(this);
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}
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};
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img.src = url;
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}
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return img;
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};
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module.exports = Images;
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