<html>
	<head>
		<title>Real-Time Data Streaming with Two Data Sets</title>
		<meta http-equiv="content-type" content="text/html;charset=utf-8"/>	
		<script type="text/javascript" language="javascript" src="./../js/AnyChartStock.js?v=1.9.0r9317"></script>
		<!-- Randomizer script. It is used to make random more smooth. -->
		<script type="text/javascript" language="javascript" src="./js/Randomizer.js"></script>
		<!-- chart size settings -->
		<style type="text/css">
			#chartContainer {
				width: 800px;
				height: 550px;
				float: left;
			}
		</style>
		<script type="text/javascript" language="javascript">
			// Creating new chart object. 
			var chart = new AnyChartStock("./../swf/AnyChartStock.swf?v=1.9.0r9317", "./../swf/Preloader.swf?v=1.9.0r9317");
			// Setting XML config file.
			chart.setXMLFile("config.xml");
			// Writing the flash object into the page DOM.
			chart.write("chartContainer");

			// Last date in data set
			var timestamp = new Date(1273073321000);

			// A values randomizer for the first data set
			var seriesARandomizer = new Randomizer(5961.14, 5850, 6100, 6);
			// A values randomizer for second data set
			var seriesBRandomizer = new Randomizer(5994.84, 5800, 6050, 3.4);
			
			// Streaming frame interval handler
			var interval;
			
			// Function to start adding random data
			function startStreaming() {
				//Set Start and Stop buttons states
				document.getElementById("btnStart").setAttribute("disabled","disabled");
				document.getElementById("btnStop").removeAttribute("disabled");
				
				// add data every 300 ms
				interval = setInterval(updateData, 300);
				// start adding
				updateData();
			}
			
			// Adding data to data sets
			function updateData() {
				// increase date (add 1 minute)
				timestamp.setTime(timestamp.getTime() + 60 * 1000);
				
				// random values generation
				var newValueA = seriesARandomizer.generateNextValue();
				var newValueB = seriesBRandomizer.generateNextValue();
				
				// format date according to the mask set in config.xml
				// Mask: %u - Unix timestamp
				var timeStampValue = (timestamp.getTime() / 1000).toString();
				
				// Create data string according to CSV settings in сonfig.xml
				// add row to the data set and remove one row from the beginning
				chart.appendData("dataSetA", timeStampValue + "," + newValueA, 1);
				// do the same for the second data set
				chart.appendData("dataSetB", timeStampValue + "," + newValueB, 1);
				
				// apply changes made to data
		        chart.commitDataChanges();
			}
			
			// Function to stop adding random data
			function stopStreaming() {
				// Set Start and Stop buttons states
				document.getElementById("btnStart").removeAttribute("disabled");
				document.getElementById("btnStop").setAttribute("disabled","disabled");
				
				// stop reccuring updateData calls set using setInterval
				clearInterval(interval);
			}
			
			//---------------------------------------------------------------------------------------------------
			//		Enable html controls
			//---------------------------------------------------------------------------------------------------
			
			chart.onChartDraw = function() {
				document.getElementById("btnStart").removeAttribute("disabled");
				chart.onChartDraw = null;
			}
		</script>
		<!-- table settings -->
		<style type="text/css">
			table.settings {
				border-style: solid;
				border-width: 1px;
				border-color: #D0CDC9;
			}

			table.settings tr th {
				font:normal 60% Verdana;
				background-color: #DCD9D5;
				font-weight:bold;
				padding-bottom:5px;
				padding-top:5px;
				padding-left:10px;
				text-align:left;
			}
			table.settings tr td {
				background-color: #F8F4F0;
				font:normal 70% Verdana;
				padding-bottom:2px;
				padding-top:2px;
				padding-left:10px;
				text-align:left;	
			}
		</style>
	</head>
	<body>
		<div id="chartContainer"><!-- Chart Container --></div>

		<table class="settings">
			<tr><th>Data Streaming:</th></tr>
			<tr><td><input id="btnStart" disabled="disabled" type="button" value="Start Streaming" onclick="startStreaming()" autocomplete="off" /></td></tr>
			<tr><td><input id="btnStop" disabled="disabled" type="button" value="Stop Streaming" onclick="stopStreaming()" autocomplete="off" /></td></tr>
		</table>
	</body>
</html>

Sample Description

How to use this sample?

This sample shows how AnyChart Stock can be used to show changing data in real time. Press "Start Streaming" and "Stop Streaming" buttons to see how it works. Two different data sets are used.

to top

How it works

AnyChart Stock component gives you the ability to add, remove or modify data points in real-time without full chart reloading and redrawing - you can do just what you need in a fast and flexible way.

This sample generates several random data points regularly, upon intervals defined in setInterval function and inserts them into the data sets defined in config.xml using appendData function. Every time new data is added commitDataChanges function is called to apply changes.

You can learn everything you need to know about real-time data streaming and update in Real-Time Data Streaming and Data Manipulations article.

to top

AnyChartStock JavaScript API

This sample uses the following methods, properties and events from AnyChartStock JavaScript API:

Item Type Description
appendData Method Appends data to the chart.
commitDataChanges Method Commits data appends and data points erasure made by appendData(), removeDataRow() and removeDataRange() method calls.
setXMLFile Method Sets chart XML configuration file path.
write Method Adds the chart to HTML DOM as a child of the specified container.
onChartDraw Event This event is dispatched when the AnyChart Stock is drawn.

to top

Prerequisites

This section lists all configuration, data and auxiliary files required for this sample.

Configuration file

CSV files

SWF files

  • AnyChartStock.swf - AnyChart Stock component.
  • Preloader.swf - AnyChart Stock helper component that loads the main component (AnyChartStock.swf) and displays loading progress.

JavaScript Libraries

  • Randomizer.js - A sample JavaScript library that generates random values.
  • AnyChartStock.js - A JavaScript library that is shipped with AnyChart Stock component. It is used to embed the component into HTML DOM and to comunicate with the Flash part.

to top

The information contained in this website is for general information purposes only. All sample data provided on this site is for demonstration purposes only.

The logos and names of other companies and products mentioned on this site are copyright and/or trademarks of their respective owners.

The content on this site, including news, quotes, data and other information, is provided for your personal information only, and is intended for demonstration purposes only. Content on this site is not appropriate for the purposes of making a decision to carry out a transaction or trade. Nor does it provide any form of advice (investment, tax, legal) amounting to investment advice, or make any recommendations regarding particular financial instruments, investments or products.

In no event AnyChart will be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with, the use of this website.

This site may point to other Internet sites that may be of interest to you, however AnyChart does not endorse or take responsibility for the content on such other sites

Market data and News provided by and copyright RediNews, Incorporated.