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   1  /**
   2   * jqPlot
   3   * Pure JavaScript plotting plugin using jQuery
   4   *
   5   * Version: 1.0.2
   6   * Revision: 1108
   7   *
   8   * Copyright (c) 2009-2011 Chris Leonello
   9   * jqPlot is currently available for use in all personal or commercial projects 
  10   * under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL 
  11   * version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can 
  12   * choose the license that best suits your project and use it accordingly. 
  13   *
  14   * Although not required, the author would appreciate an email letting him 
  15   * know of any substantial use of jqPlot.  You can reach the author at: 
  16   * chris at jqplot dot com or see http://www.jqplot.com/info.php .
  17   *
  18   * If you are feeling kind and generous, consider supporting the project by
  19   * making a donation at: http://www.jqplot.com/donate.php .
  20   *
  21   * sprintf functions contained in jqplot.sprintf.js by Ash Searle:
  22   *
  23   *     version 2007.04.27
  24   *     author Ash Searle
  25   *     http://hexmen.com/blog/2007/03/printf-sprintf/
  26   *     http://hexmen.com/js/sprintf.js
  27   *     The author (Ash Searle) has placed this code in the public domain:
  28   *     "This code is unrestricted: you are free to use it however you like."
  29   * 
  30   */
  31  (function($) {
  32      /**
  33       * Class: $.jqplot.ciParser
  34       * Data Renderer function which converts a custom JSON data object into jqPlot data format.
  35       * Set this as a callable on the jqplot dataRenderer plot option:
  36       * 
  37       * > plot = $.jqplot('mychart', [data], { dataRenderer: $.jqplot.ciParser, ... });
  38       * 
  39       * Where data is an object in JSON format or a JSON encoded string conforming to the
  40       * City Index API spec.
  41       * 
  42       * Note that calling the renderer function is handled internally by jqPlot.  The
  43       * user does not have to call the function.  The parameters described below will
  44       * automatically be passed to the ciParser function.
  45       * 
  46       * Parameters:
  47       * data - JSON encoded string or object.
  48       * plot - reference to jqPlot Plot object.
  49       * 
  50       * Returns:
  51       * data array in jqPlot format.
  52       * 
  53       */
  54      $.jqplot.ciParser = function (data, plot) {
  55          var ret = [],
  56              line,
  57              temp,
  58              i, j, k, kk;
  59      
  60           if (typeof(data) == "string") {
  61               data =  $.jqplot.JSON.parse(data, handleStrings);
  62           }
  63   
  64           else if (typeof(data) == "object") {
  65               for (k in data) {
  66                   for (i=0; i<data[k].length; i++) {
  67                       for (kk in data[k][i]) {
  68                           data[k][i][kk] = handleStrings(kk, data[k][i][kk]);
  69                       }
  70                   }
  71               }
  72           }
  73   
  74           else {
  75               return null;
  76           }
  77   
  78           // function handleStrings
  79           // Checks any JSON encoded strings to see if they are
  80           // encoded dates.  If so, pull out the timestamp.
  81           // Expects dates to be represented by js timestamps.
  82   
  83           function handleStrings(key, value) {
  84              var a;
  85              if (value != null) {
  86                  if (value.toString().indexOf('Date') >= 0) {
  87                      //here we will try to extract the ticks from the Date string in the "value" fields of JSON returned data
  88                      a = /^\/Date\((-?[0-9]+)\)\/$/.exec(value);
  89                      if (a) {
  90                          return parseInt(a[1], 10);
  91                      }
  92                  }
  93                  return value;
  94              }
  95           }
  96   
  97          for (var prop in data) {
  98              line = [];
  99              temp = data[prop];
 100              switch (prop) {
 101                  case "PriceTicks":
 102                      for (i=0; i<temp.length; i++) {
 103                          line.push([temp[i]['TickDate'], temp[i]['Price']]);
 104                      }
 105                      break;
 106                  case "PriceBars":
 107                      for (i=0; i<temp.length; i++) {
 108                          line.push([temp[i]['BarDate'], temp[i]['Open'], temp[i]['High'], temp[i]['Low'], temp[i]['Close']]);
 109                      }
 110                      break;
 111              }
 112              ret.push(line);
 113          }
 114          return ret;
 115      };
 116  })(jQuery);