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/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
if(!dojo._hasResource["dojox.charting.StoreSeries"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.charting.StoreSeries"] = true;
dojo.provide("dojox.charting.StoreSeries");
dojo.declare("dojox.charting.StoreSeries", null, {
constructor: function(store, kwArgs, value){
// summary:
// Series adapter for dojo object stores (dojo.store).
// store: Object:
// A dojo object store.
// kwArgs: Object:
// A store-specific keyword parameters used for querying objects.
// See dojo.store docs
// value: Function|Object|String|Null:
// Function, which takes an object handle, and
// produces an output possibly inspecting the store's item. Or
// a dictionary object, which tells what names to extract from
// an object and how to map them to an output. Or a string, which
// is a numeric field name to use for plotting. If undefined, null
// or empty string (the default), "value" field is extracted.
this.store = store;
this.kwArgs = kwArgs;
if(value){
if(typeof value == "function"){
this.value = value;
}else if(typeof value == "object"){
this.value = function(object){
var o = {};
for(var key in value){
o[key] = object[value[key]];
}
return o;
};
}else{
this.value = function(object){
return object[value];
};
}
}else{
this.value = function(object){
return object.value;
};
}
this.data = [];
this.fetch();
},
destroy: function(){
// summary:
// Clean up before GC.
if(this.observeHandle){
this.observeHandle.dismiss();
}
},
setSeriesObject: function(series){
// summary:
// Sets a dojox.charting.Series object we will be working with.
// series: dojox.charting.Series:
// Our interface to the chart.
this.series = series;
},
// store fetch loop
fetch: function(){
// summary:
// Fetches data from the store and updates a chart.
var objects = this.objects = [];
var self = this;
if(this.observeHandle){
this.observeHandle.dismiss();
}
var results = this.store.query(this.kwArgs.query, this.kwArgs);
dojo.when(results, function(objects){
self.objects = objects;
update();
});
if(results.observe){
this.observeHandle = results.observe(update, true);
}
function update(){
self.data = dojo.map(self.objects, function(object){
return self.value(object, self.store);
});
self._pushDataChanges();
}
},
_pushDataChanges: function(){
if(this.series){
this.series.chart.updateSeries(this.series.name, this);
this.series.chart.delayedRender();
}
}
});
}
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