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MultiDataLoader.js
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MultiDataLoader.js
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var DataLoadedEvent = function(data){
EventType.call(this, "dataLoaded");
Object.defineProperty(this, "data", {
value: data,
enumerable : true
});
}
DataLoadedEvent.prototype = Object.create(EventType.prototype);
var MultiDataLoader = function(urlArray){
EventTarget.call(this);
Object.defineProperties(this,{
__url : {
value : urlArray
},
__fileCount : {
value : urlArray.length
},
__fileLoaded : {
value : 0,
writable: true
}
});
}
var csv = d3.dsv(",", "text/csv; charset=big5");
MultiDataLoader.prototype = Object.create(EventTarget.prototype, {
startLoading : {
value : function(){
var loader = this;
for(var i = 0, n = this.__url.length; i < n; i++){
var dataurl = this.__url[i];
var dataType = dataurl.split(".")[1];
if(dataType === "json"){
d3.json(dataurl, function(d){
loader.fileLoaded(d);
});
}else if(dataType === "csv"){
csv(dataurl, function(d){
loader.fileLoaded(d);
});
}
}
},
enumerable : true
},
fileLoaded : {
value : function(d){
rawData.push(d);
this.__fileLoaded ++;
if(this.__fileLoaded === this.__fileCount){
this.__fire(
new DataLoadedEvent(d)
);
}
},
enumerable : true
}
});