jqplot.ciParser.js
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/**
* jqPlot
* Pure JavaScript plotting plugin using jQuery
*
* Version: 1.0.4
* Revision: 1121
*
* 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($) {
/**
* Class: $.jqplot.ciParser
* Data Renderer function which converts a custom JSON data object into jqPlot data format.
* Set this as a callable on the jqplot dataRenderer plot option:
*
* > plot = $.jqplot('mychart', [data], { dataRenderer: $.jqplot.ciParser, ... });
*
* Where data is an object in JSON format or a JSON encoded string conforming to the
* City Index API spec.
*
* Note that calling the renderer function is handled internally by jqPlot. The
* user does not have to call the function. The parameters described below will
* automatically be passed to the ciParser function.
*
* Parameters:
* data - JSON encoded string or object.
* plot - reference to jqPlot Plot object.
*
* Returns:
* data array in jqPlot format.
*
*/
$.jqplot.ciParser = function (data, plot) {
var ret = [],
line,
temp,
i, j, k, kk;
if (typeof(data) == "string") {
data = $.jqplot.JSON.parse(data, handleStrings);
}
else if (typeof(data) == "object") {
for (k in data) {
for (i=0; i<data[k].length; i++) {
for (kk in data[k][i]) {
data[k][i][kk] = handleStrings(kk, data[k][i][kk]);
}
}
}
}
else {
return null;
}
// function handleStrings
// Checks any JSON encoded strings to see if they are
// encoded dates. If so, pull out the timestamp.
// Expects dates to be represented by js timestamps.
function handleStrings(key, value) {
var a;
if (value != null) {
if (value.toString().indexOf('Date') >= 0) {
//here we will try to extract the ticks from the Date string in the "value" fields of JSON returned data
a = /^\/Date\((-?[0-9]+)\)\/$/.exec(value);
if (a) {
return parseInt(a[1], 10);
}
}
return value;
}
}
for (var prop in data) {
line = [];
temp = data[prop];
switch (prop) {
case "PriceTicks":
for (i=0; i<temp.length; i++) {
line.push([temp[i]['TickDate'], temp[i]['Price']]);
}
break;
case "PriceBars":
for (i=0; i<temp.length; i++) {
line.push([temp[i]['BarDate'], temp[i]['Open'], temp[i]['High'], temp[i]['Low'], temp[i]['Close']]);
}
break;
}
ret.push(line);
}
return ret;
};
})(jQuery);