<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
	<head>
		<title>Export chart as PNG into base64 encoded string</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>
		<script type="text/javascript" language="javascript" src="./js/jquery.min.js"></script>
		<!-- chart size settings -->
		<style type="text/css">
			#chartContainer {
				width: 700px;
				height: 400px;
			}
		</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");
            
			//--------------------------------------------------------------------------------
			//		Exporting
			//--------------------------------------------------------------------------------
			
			// Function to export component as PNG image (base64 encoded string)
			function getBase64PNG() {
				// object with settings
				var exportSettings = {
					backgroundColor: $("#bgColor").val(), // background color of PNG image
					transparent: $("#transparent").get(0).checked // use transparency or not
				};
				
				var useCustomSize = $("#useCustomSize").get(0).checked; // use custom or original size
				if (useCustomSize) {
					exportSettings.size = "Custom";  // custom size is used
					exportSettings.width = $("#imgWidth").val(); // custom image width
					exportSettings.height = $("#imgHeight").val(); // custom image height
					exportSettings.resizingMode = $("#resizingMode").val(); // resizing mode
					exportSettings.cutExtraSpace = $("#cropExtraSpace").get(0).checked; // cut extra space settings
				}else {
					exportSettings.size = "Original"; //  use original size
				}
				
				$("#base64data").val(chart.getPNGImageBase64Encoded(exportSettings)); // Get PNG image as base64 encoded string and show it in <textarea id="base64data" />
			}
			
			//--------------------------------------------------------------------------------
			//		Auxiliary Interface Functions
			//--------------------------------------------------------------------------------
            
			// Function to update inputs states depending on custom size flag state
			function checkCustomSize() {
				var disable = !$("#useCustomSize").get(0).checked;
				if (disable) {
					$("#imgWidth").attr("disabled","disabled");
					$("#imgHeight").attr("disabled","disabled");
					$("#resizingMode").attr("disabled","disabled");
					$("#cropExtraSpace").attr("disabled","disabled");
				}else {
					$("#imgWidth").removeAttr("disabled");
					$("#imgHeight").removeAttr("disabled");
					$("#resizingMode").removeAttr("disabled");
					$("#cropExtraSpace").removeAttr("disabled");
				}
			}
            
			// Function to update inputs states depending on resizing mode
			function checkResizingMode() {
				if (!$("#useCustomSize").get(0).checked) return;
				
				var mode = $("#resizingMode").val();
				if (mode == "Stretch" || mode == "Recalculate")
					$("#cropExtraSpace").attr("disabled","disabled");
				else
					$("#cropExtraSpace").removeAttr("disabled");
			}
			
			// Function to disable/enable bgColor depending on transparency settings
			function checkTransparent() {
				if ($("#transparent").get(0).checked)
					$("#bgColor").attr("disabled","disabled");
				else
					$("#bgColor").removeAttr("disabled");
			}
			
			//---------------------------------------------------------------------------------------------------
			//		html events binding
			//---------------------------------------------------------------------------------------------------
			
			$(function() {
				$("#useCustomSize").change(checkCustomSize);
				$("#resizingMode").change(checkResizingMode);
				$("#transparent").change(checkTransparent);
			});
			
			//---------------------------------------------------------------------------------------------------
			//		Enable html controls
			//---------------------------------------------------------------------------------------------------
			
			chart.onChartDraw = function() {
				$("#useCustomSize").removeAttr("disabled");
				$("#btnGet").removeAttr("disabled");
				$("#transparent").removeAttr("disabled");
				$("#bgColor").removeAttr("disabled");
				
				chart.onChartDraw = null;
			}
		</script>
		<style type="text/css">
			/* style settings */
			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, table.settings select {
				width: 170px;
			}
			
			#base64data {
				width: 700px;
				height: 200px;
				background-color: #FEFEFE;
				border-width: 1px;
				border-color: #C9C6C2;
				border-style: solid;
			}
		</style>
	</head>
	<body>
		<table>
			<tr valign="top">
				<td>
					<table class="settings">
						<tr><th>Source chart:</th></tr>
						<tr>
							<td id="chartContainer"><!-- Chart Container --></td>
						</tr>
					</table>
				</td>
				<td>
	 				<table class="settings">
						<tr>
							<th colspan="2">PNG settings</th>
						</tr>
						<!-- transparent -->
						<tr>
							<td>Transparent:</td>
							<td><input type="checkbox" disabled="disabled" id="transparent" autocomplete="off" /></td>
						</tr>
						<!-- background color -->
						<tr>
							<td>bgColor:</td>
							<td><input type="text" disabled="disabled" id="bgColor" value="#FFFFFF" autocomplete="off" /></td>
						</tr>
						
						<tr>
							<th colspan="2">Size settings:</th>
						</tr>
						
						<!-- use custom size -->
						<tr>
							<td>Use custom size:</td>
							<td><input type="checkbox" disabled="disabled" id="useCustomSize" autocomplete="off" /></td>
						</tr>
						
						<!-- width -->
						<tr>
							<td>Width:</td>
							<td><input type="text" disabled="disabled" id="imgWidth" autocomplete="off" value="550" /></td>
						</tr>
						<!-- height -->
						<tr>
							<td>Height:</td>
							<td><input type="text" disabled="disabled" id="imgHeight" autocomplete="off" value="400"></td>
						</tr>
						<!-- resizing mode -->
						<tr>
							<td>Resizing mode:</td>
							<td><select id="resizingMode" disabled="disabled" autocomplete="off">
									<option value="Fit">Fit</option>
									<option value="Recalculate">Recalculate</option>
									<option value="Stretch">Stretch</option>
									<option value="RecalculateByProportions">RecalculateByProportions</option>
								</select></td>
						</tr>
						<!-- crop extra space -->
						<tr>
							<td>Crop extra space:</td>
							<td><input type="checkbox" disabled="disabled" id="cropExtraSpace" autocomplete="off"></td>
						</tr>
	 				</table>
					<table width="100%">
						<tr><td align="right"><input type="button" disabled="disabled" id="btnGet" value="Get base64 encoded png image" onclick="getBase64PNG()" /></td></tr>
					</table>
				</td>
			</tr>
			<tr>
				<td>
					<table class="settings">
						<tr><th>Output result:</th></tr>
						<!-- textarea with base64 string -->
						<tr><td><textarea id="base64data"></textarea></td></tr>
					</table>
				</td>
			</tr>
		</table>
	</body>
</html>

Sample Description

How to use this sample?

Use controls to the right of the chart to tune PNG export settings and click "Get base64 encoded png image" button to put base64 encoded string of PNG exported chart into the textarea below the chart.

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How it works

The AnyChart Stock component offers both end-user and developer, using the component, a very wide range of options for exporting charts in any format. A chart can be exported as a static image in the PNG or JPG format or as a PDF document with an embedded static image of the chart or a fully interactive functional chart, as user sees it on the page.

This sample shows how to configure export settings and obtain base64 encoded content of the exported file using getPNGImageBase64Encoded function.

You can learn more about image export in Chart Exporting section and learn about PNG export settings in PNG Image Export Settings 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.

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