primitive.js #1

/*
	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.scaler.primitive"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.charting.scaler.primitive"] = true;
dojo.provide("dojox.charting.scaler.primitive");

dojox.charting.scaler.primitive = {
	buildScaler: function(/*Number*/ min, /*Number*/ max, /*Number*/ span, /*Object*/ kwArgs){
		if(min == max){
			// artificially extend bounds
			min -= 0.5;
			max += 0.5;
			// now the line will be centered
		}
		return {
			bounds: {
				lower: min,
				upper: max,
				from:  min,
				to:    max,
				scale: span / (max - min),
				span:  span
			},
			scaler: dojox.charting.scaler.primitive
		};
	},
	buildTicks: function(/*Object*/ scaler, /*Object*/ kwArgs){
		return {major: [], minor: [], micro: []};	// Object
	},
	getTransformerFromModel: function(/*Object*/ scaler){
		var offset = scaler.bounds.from, scale = scaler.bounds.scale;
		return function(x){ return (x - offset) * scale; };	// Function
	},
	getTransformerFromPlot: function(/*Object*/ scaler){
		var offset = scaler.bounds.from, scale = scaler.bounds.scale;
		return function(x){ return x / scale + offset; };	// Function
	}
};

}