<html>
	<head>
		<title>Real-Time Data Streaming with Simple Data Set</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);
			
			// Randomizer instance for values
			var seriesARandomizer = new Randomizer(5961.14, 5940, 6100, 4);
			
			// Interval
			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();
			}

			// Add point to data set
			function updateData() {
				// increase date (add 1 minute)
				timestamp.setTime(timestamp.getTime() + 60 * 1000);

				var newValueA = seriesARandomizer.generateNextValue();
				
				// format date according to the mask set in config.xml
				// Mask: %u - Unix timestamp
				var timeStampValue = (timestamp.getTime() / 1000).toString();

				// Create string according to CSV settings for data set named "data" in —Āonfig.xml
				// add row to the data set and remove one row from the beginning

				chart.appendData("dataSetA", timeStampValue + "," + newValueA, 1);
				// Apply changes
		        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. Use "Start Streaming" and "Stop Streaming" buttons to see how it works. Single date set is used and updated.

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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 set 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.

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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.

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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.

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