<html>
	<head>
		<title>Updating Existing Data Set Values</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: 650px;
				height: 450px;
				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");
			
			//--------------------------------------------------------------------------------
			//		DateTime formatting
			//--------------------------------------------------------------------------------
			
			// function to format Date according to %T mask (see config.xml)
			function formatDateTime(date) {
				return date.getTime().toString();
			}
			
			//--------------------------------------------------------------------------------
			//		Values updating
			//--------------------------------------------------------------------------------
			
			// series values update is the update of data set linked to it through data provider
			
			// update Series A values
			function updateSeriesAValues() {
				// randomizer
				var rnd = new Randomizer(15, 15, 35, 1.2);
				// start date
				var date = new Date(Date.UTC(2010, 6, 1, 9));
				
				// new series data
				var newCSVData = "";
				
				// generate 360 random points
				for (var i = 0; i < 360; i++) {
					date.setUTCMinutes(date.getUTCMinutes() + 1); // increase date (add one minute)
					newCSVData += formatDateTime(date) + "," + rnd.generateNextValue()+"\n"; // create csv row according to settings in config.xml
				}
				
				chart.appendData("dataSetA", newCSVData); // update data in dataset 
				chart.commitDataChanges(); // apply changes
			}
			
			// update Series B values
			function updateSeriesBValues() {
				var newCSVData = "";
				var rnd = new Randomizer(13, 13, 28, 1.4);
				var date = new Date(Date.UTC(2010, 6, 1, 9));

				// generate 360 random points
				for (var i = 0; i < 360; i++) {
					date.setUTCMinutes(date.getUTCMinutes() + 1); // increase date (add one minute)
					newCSVData += formatDateTime(date) + "," + rnd.generateNextValue()+"\n"; // create csv row according to settings in config.xml
				}

				chart.appendData("dataSetB", newCSVData); // update data in dataset 
				chart.commitDataChanges(); // apply changes
			}
			
			//---------------------------------------------------------------------------------------------------
			//		Enable html controls
			//---------------------------------------------------------------------------------------------------
			
			chart.onChartDraw = function() {
				document.getElementById("updateSeriesA").removeAttribute("disabled");
				document.getElementById("updateSeriesB").removeAttribute("disabled");
				
				chart.onChartDraw = null;
			}
		</script>
		<!-- style 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;
				padding-right:10px;
				text-align:left;
			}
			table.settings tr td {
				background-color: #F8F4F0;
				font:normal 70% Verdana;
				padding-bottom:2px;
				padding-top:2px;
				padding-left:10px;
				padding-right:10px;
				text-align:left;	
			}
		</style>
	</head>
	<body>
		<div id="chartContainer"><!-- Chart Container --></div>
		<table class="settings">
			<tr><th>Click to change Series Values:</th></tr>
			<tr><td><input type="button" disabled="disabled" id="updateSeriesA" value="Update Series A" onclick="updateSeriesAValues()" /></td></tr>
			<tr><td><input type="button" disabled="disabled" id="updateSeriesB" value="Update Series B" onclick="updateSeriesBValues()" /></td></tr>
		</table>
	</body>
</html>

Sample Description

How to use this sample?

Click buttons to the right of the chart and see how chart values are updated.

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How it works

This sample shows how chart values can be updated in real-time using methods described in Real-Time Data Streaming and Data Manipulations.

Particularly, when you click buttons script generates random points and then pushes them into the data set using appendData method which should be followed by commitDataChanges to apply changes, this leads to the update of all values in the series. Note, that when you update Series A not only series displayed on the chart changes, but also thumbnail series in scroller is updated too, because they are based on the same data set.

The special thing in this sample you should understand is the fact, that appendData is used for updating values too, not only for adding or inserting - please see Logic Principles section in Real-Time Data Streaming and Data Manipulations.

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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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