cloudvisio/lib/chart.js

Visual Representation of cloud data

// charts
var force = require('../charts/force'),
	pie = require('../charts/pie'),
	stack = require('../charts/stack');

var chart = {

	// retrieving chart (or adding a new custom chart)
	chart: function( chart ){
		if (!arguments.length) return this._chart;
		// otherwise save provided chart.. evaluate the function first?
		// create a new, non-conflicting container if it exists
		//if(typeof this.charts[this.options.layout] != "undefined"){
		//	this.options.layout = "untitled";
		//}
		var Chart; // class name
		// find the right chart
		if(typeof chart == "string"){
			// find chart from the charts collection
			Chart = this.charts[ chart ] || null;
			// exit now if we didn't find it...
			if( Chart === null ) return this;
		} else if(typeof chart == "function"){
			Chart = chart;
			var layout = chart.prototype.layout || "untitled";
			// it it's a new layout...
			if(typeof this.charts[ layout ] == "undefined"){
				this.charts[this.options.layout] = chart;
				// set the new layout automatically?
				this.options.layout = layout;
			}
		}
		//
		// either way create a new instance of the chart
		this._chart = new Chart( this );
		//this.charts[this.options.layout]
		// preserve chainability
		return this;
	},

	// default layouts
	charts: {
		force: force,
		pie: pie,
		stack: stack
	},

	// loop through charts
	//for(var i in charts){
	//	Cloudvisio.prototype.charts[ charts[i] ] = charts[i];
	//}

	_lookupSchema: function( type, preferred ){
		// fallbacks
		type = type || false;
		preferred = preferred || false;
		// prerequisite
		if( !type ) return false;
		// variables
		var keys = Object.keys( this._axis );
		if( !keys ) return false;
		var schema = this.chart().schema;
		// if there's a preferred field, try to pick that
		//console.log("schema", schema);
		if( preferred && keys[preferred] && schema[preferred] == type){
			console.log("preferred", preferred);
			return preferred;
		}
		for( var i in schema ){
			if( schema[i] == type ) return i;
		}
		return false;
	},

	// Internal
	// - instantiated chart
	_chart: null

}

module.exports = chart;