include/lib/jqplot/plugins/jqplot.bubbleRenderer.js

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/**
 * jqPlot
 * Pure JavaScript plotting plugin using jQuery
 *
 * Version: 1.0.3
 * Revision: 1117
 *
 * Copyright (c) 2009-2012 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 arrayMax = function( array ){
        return Math.max.apply( Math, array );
    };
    var arrayMin = function( array ){
        return Math.min.apply( Math, array );
    };

    /**
     * Class: $.jqplot.BubbleRenderer
     * Plugin renderer to draw a bubble chart.  A Bubble chart has data points displayed as
     * colored circles with an optional text label inside.  To use
     * the bubble renderer, you must include the bubble renderer like:
     * 
     * > <script language="javascript" type="text/javascript" src="../src/plugins/jqplot.bubbleRenderer.js"></script>
     * 
     * Data must be supplied in 
     * the form:
     * 
     * > [[x1, y1, r1, <label or {label:'text', color:color}>], ...]
     * 
     * where the label or options 
     * object is optional.  
     * 
     * Note that all bubble colors will be the same
     * unless the "varyBubbleColors" option is set to true.  Colors can be specified in the data array
     * or in the seriesColors array option on the series.  If no colors are defined, the default jqPlot
     * series of 16 colors are used.  Colors are automatically cycled around again if there are more
     * bubbles than colors.
     *
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