Web/js/jqplot/plugins/jqplot.highlighter.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($) {
    $.jqplot.eventListenerHooks.push(['jqplotMouseMove', handleMove]);
    
    /**
     * Class: $.jqplot.Highlighter
     * Plugin which will highlight data points when they are moused over.
     * 
     * To use this plugin, include the js
     * file in your source:
     * 
     * > <script type="text/javascript" src="plugins/jqplot.highlighter.js"></script>
     * 
     * A tooltip providing information about the data point is enabled by default.
     * To disable the tooltip, set "showTooltip" to false.
     * 
     * You can control what data is displayed in the tooltip with various
     * options.  The "tooltipAxes" option controls whether the x, y or both
     * data values are displayed.
     * 
     * Some chart types (e.g. hi-low-close) have more than one y value per
     * data point. To display the additional values in the tooltip, set the
     * "yvalues" option to the desired number of y values present (3 for a hlc chart).
     * 
     * By default, data values will be formatted with the same formatting
     * specifiers as used to format the axis ticks.  A custom format code
     * can be supplied with the tooltipFormatString option.  This will apply 
     * to all values in the tooltip.  
     * 
     * For more complete control, the "formatString" option can be set.  This
     * Allows conplete control over tooltip formatting.  Values are passed to
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