Web/js/jqplot/plugins/jqplot.canvasOverlay.js

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/**
 * jqPlot
 * Pure JavaScript plotting plugin using jQuery
 *
 * Version: 1.0.8
 * Revision: 1250
 *
 * Copyright (c) 2009-2013 Chris Leonello
 * jqPlot is currently available for use in all personal or commercial projects 
 * under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL 
 * version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can 
 * choose the license that best suits your project and use it accordingly. 
 *
 * Although not required, the author would appreciate an email letting him 
 * know of any substantial use of jqPlot.  You can reach the author at: 
 * chris at jqplot dot com or see http://www.jqplot.com/info.php .
 *
 * If you are feeling kind and generous, consider supporting the project by
 * making a donation at: http://www.jqplot.com/donate.php .
 *
 * sprintf functions contained in jqplot.sprintf.js by Ash Searle:
 *
 *     version 2007.04.27
 *     author Ash Searle
 *     http://hexmen.com/blog/2007/03/printf-sprintf/
 *     http://hexmen.com/js/sprintf.js
 *     The author (Ash Searle) has placed this code in the public domain:
 *     "This code is unrestricted: you are free to use it however you like."
 * 
 */
(function($) {
    var objCounter = 0;
    // class: $.jqplot.CanvasOverlay
    $.jqplot.CanvasOverlay = function(opts){
        var options = opts || {};
        this.options = {
            show: $.jqplot.config.enablePlugins,
            deferDraw: false
        };
        // prop: objects
        this.objects = [];
        this.objectNames = [];
        this.canvas = null;
        this.markerRenderer = new $.jqplot.MarkerRenderer({style:'line'});
        this.markerRenderer.init();
        this.highlightObjectIndex = null;
        if (options.objects) {
            var objs = options.objects,
                obj;
            for (var i=0; i<objs.length; i++) {
                obj = objs[i];
                for (var n in obj) {
                    switch (n) {
                        case 'line':
                            this.addLine(obj[n]);
                            break;
                        case 'horizontalLine':
                            this.addHorizontalLine(obj[n]);
                            break;
                        case 'dashedHorizontalLine':