115 lines
4.0 KiB
JavaScript
115 lines
4.0 KiB
JavaScript
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/**
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* jqPlot
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* Pure JavaScript plotting plugin using jQuery
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*
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* Version: 1.0.0b2_r792
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*
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* Copyright (c) 2009-2011 Chris Leonello
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* jqPlot is currently available for use in all personal or commercial projects
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* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
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* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
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* choose the license that best suits your project and use it accordingly.
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*
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* Although not required, the author would appreciate an email letting him
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* know of any substantial use of jqPlot. You can reach the author at:
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* chris at jqplot dot com or see http://www.jqplot.com/info.php .
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*
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* If you are feeling kind and generous, consider supporting the project by
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* making a donation at: http://www.jqplot.com/donate.php .
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*
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* sprintf functions contained in jqplot.sprintf.js by Ash Searle:
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*
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* version 2007.04.27
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* author Ash Searle
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* http://hexmen.com/blog/2007/03/printf-sprintf/
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* http://hexmen.com/js/sprintf.js
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* The author (Ash Searle) has placed this code in the public domain:
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* "This code is unrestricted: you are free to use it however you like."
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*
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*/
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(function($) {
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/**
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* Class: $.jqplot.ciParser
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* Data Renderer function which converts a custom JSON data object into jqPlot data format.
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* Set this as a callable on the jqplot dataRenderer plot option:
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*
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* > plot = $.jqplot('mychart', [data], { dataRenderer: $.jqplot.ciParser, ... });
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*
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* Where data is an object in JSON format or a JSON encoded string conforming to the
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* City Index API spec.
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*
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* Note that calling the renderer function is handled internally by jqPlot. The
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* user does not have to call the function. The parameters described below will
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* automatically be passed to the ciParser function.
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*
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* Parameters:
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* data - JSON encoded string or object.
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* plot - reference to jqPlot Plot object.
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*
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* Returns:
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* data array in jqPlot format.
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*
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*/
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$.jqplot.ciParser = function (data, plot) {
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var ret = [],
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line,
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temp,
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i, j, k, kk;
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if (typeof(data) == "string") {
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data = $.jqplot.JSON.parse(data, handleStrings);
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}
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else if (typeof(data) == "object") {
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for (k in data) {
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for (i=0; i<data[k].length; i++) {
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for (kk in data[k][i]) {
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data[k][i][kk] = handleStrings(kk, data[k][i][kk]);
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}
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}
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}
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}
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else {
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return null;
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}
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// function handleStrings
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// Checks any JSON encoded strings to see if they are
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// encoded dates. If so, pull out the timestamp.
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// Expects dates to be represented by js timestamps.
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function handleStrings(key, value) {
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var a;
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if (value != null) {
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if (value.toString().indexOf('Date') >= 0) {
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//here we will try to extract the ticks from the Date string in the "value" fields of JSON returned data
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a = /^\/Date\((-?[0-9]+)\)\/$/.exec(value);
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if (a) {
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return parseInt(a[1], 10);
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}
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}
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return value;
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}
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}
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for (var prop in data) {
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line = [];
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temp = data[prop];
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switch (prop) {
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case "PriceTicks":
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for (i=0; i<temp.length; i++) {
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line.push([temp[i]['TickDate'], temp[i]['Price']]);
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}
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break;
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case "PriceBars":
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for (i=0; i<temp.length; i++) {
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line.push([temp[i]['BarDate'], temp[i]['Open'], temp[i]['High'], temp[i]['Low'], temp[i]['Close']]);
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}
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break;
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}
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ret.push(line);
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}
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return ret;
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};
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})(jQuery);
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