<html>
	<head>
		<title>Export Chart as PNG Image Automatically</title>
		<meta http-equiv="content-type" content="text/html;charset=utf-8"/>
		<!-- jquery library is used to create AJAX calls -->
		<script type="text/javascript" language="javascript" src="./js/jquery.min.js"></script>
		<script type="text/javascript" language="javascript" src="./../js/AnyChartStock.js?v=1.9.0r9317"></script>
		<!-- chart size settings -->
		<style type="text/css">
			#chartContainer {
				width: 800px;
				height: 300px;
			}
		</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");
			
			// Save chart image to server
			function saveImage() {
				// POST query to save.php 
				$.post("save.php", { // post params
						imgType: "png", 
						timestamp: (new Date()).getTime(),
						imgData: chart.getPNGImageBase64Encoded({ // get base64 encoded png string
							size: "Original",
							transparent: false,
							background–°olor: "#FFFFFF"
						})
					},
					function(data) { // load handler
						alert ("Image was saved to the server: "+data);
						document.getElementById("res").src = data; // set image src
					});
			}
			
			// onChartDraw handler
			chart.onChartDraw = function() {
				saveImage();
			}
		</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;	
			}
			
			table.settings input {
				width: 100%;
			}
		</style>
	</head>
	<body>
		<table class="settings" style="float:left;">
			<tr>
				<th>Source chart:</th>
			</tr>
			<tr>
				<td id="chartContainer"><!-- Chart Container --></td>
			</tr>
			<tr>
				<th>Saved image:</th>
			</tr>
			<tr>
				<td><img id="res" /></td>
			</tr>
		</table>
	</body>
</html>

Sample Description

How to use this sample?

In this sample onChartDraw event is handled and chart is exported automatically to server as PNG image as soon as it is rendered. The saved image is displayed under the chart.

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How it works

AnyStock allows to obtain a snapshot of the chart being displayed to user in the Base64-encoded format and passing that to the server script by an AJAX-assisted POST request. The server-side script, in its turn, can handle that data any way you need it - save it, pass or modify, and so on.

This sample invokes saveImage function when onChartDraw event happens, which uses getPNGImageBase64Encoded function to get PNG chart snapshot and sends base64 encoded image to save.php script.

You can read more about this feature at: Export to a Server article.

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AnyChartStock JavaScript API

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

Item Type Description
getPNGImageBase64Encoded Method Gets a chart screenshot as a base64 encoded PNG image.
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

  • jquery.min.js - A JavaScript jQuery library. Learn more at jQuery official site.
  • 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.

Additional Files

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