flymis/WebRoot/dojojs/src/charting/Series.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.charting.Series");
dojo.require("dojo.lang.common");
dojo.require("dojo.charting.Plotters");

dojo.charting.Series = function(/* object? */kwArgs){
	//	summary
	//	Create an instance of data series for plotting.
	var args = kwArgs || { length:1 };
	this.dataSource = args.dataSource || null;
	this.bindings = { };
	this.color = args.color;
	this.label = args.label;

	if(args.bindings){
		for(var p in args.bindings){
			this.addBinding(p, args.bindings[p]);
		}
	}
};

dojo.extend(dojo.charting.Series, {
	bind:function(/* dojo.collections.Store */src, /* object */bindings){
		//	summary
		//	Bind this series to src, with bindings.
		this.dataSource = src;
		this.bindings = bindings;
	},
	addBinding:function(/* string */name, /* string */binding){
		//	summary
		//	Bind to field "binding" using "name".
		this.bindings[name] = binding;
	},
	evaluate:function(/* object? */kwArgs){
		//	summary
		//	Evaluate all bindings and return an array of objects describing the bind.
		var ret = [];
		var a = this.dataSource.getData();
		var l = a.length;
		var start = 0;
		var end = l;
		
		/*	Allow for ranges.  Can be done in one of two ways:
		 *	1. { from, to } as 0-based indices
		 *	2. { length } as num of data points to get; a negative
		 *		value will start from the end of the data set.
		 *	No kwArg object means the full data set will be evaluated
		 *		and returned.
		 */
		if(kwArgs){
			if(kwArgs.from){