encode($model); * $xml = $xmlNode->ownerDocument->saveXML($xmlNode); * * The template.html is then loaded as a string and instances of %graph% are * replaced with the XML of the graph. In the template.html the following line * defines the page body: * * * * So the XML string of the graph becomes the second parameter of the main * function. When the template.html page is loaded in the browser, the main * function is called and within that function these lines: * * var doc = mxUtils.parseXml(xml); * var codec = new mxCodec(doc); * codec.decode(doc.documentElement, graph.getModel()); * * insert the XML into the graph model and that graph will then display. */ function main() { // True-type fonts not needed in this example mxConstants::$TTF_ENABLED = false; // Creates the graph on the server-side $graph = new mxGraph(); $model = $graph->getModel(); $parent = $graph->getDefaultParent(); $model->beginUpdate(); try { $v1 = $graph->insertVertex($parent, null, "Hello", 20, 20, 80, 30); $v2 = $graph->insertVertex($parent, null, "World", 200, 150, 80, 30); $graph->insertEdge($parent, null, "", $v1, $v2); } catch (Exception $e) { $model->endUpdate(); throw($e); } $model->endUpdate(); // Turns the graph into XML data $enc = new mxCodec(); $xmlNode = $enc->encode($model); $xml = addslashes(htmlentities(str_replace("\n", " ", $xmlNode->ownerDocument->saveXML($xmlNode)))); // Loads the template into a single string $template = mxUtils::readFile("template.html"); // Replaces the placeholder in the template with the XML data // which is then parsed into the graph model. Note: In a production // environment you should use a template engine instead. $page = str_replace("%graph%", $xml, $template); // Makes sure there is no caching on the client side header("Pragma: no-cache"); // HTTP 1.0 header("Cache-control: private, no-cache, no-store"); header("Expires: 0"); echo $page; } // Uses a local font so that all examples work on all platforms. This can be // changed to vera on Mac or arial on Windows systems. mxConstants::$DEFAULT_FONTFAMILY = "ttf/verah.ttf"; // If you can't get the fonts to render try using one of the following: //mxConstants::$DEFAULT_FONTFAMILY = "C:\WINDOWS\Fonts\arial.ttf"; //mxConstants::$DEFAULT_FONTFAMILY = "verah"; putenv("GDFONTPATH=".realpath("./ttf")); //mxConstants::$TTF_ENABLED = false; // Handles save image request if ($_SERVER["REQUEST_METHOD"] == "POST") { $xml = urldecode($_POST["xml"]); // Creates a PNG representation of the file $image = mxGraphViewImageReader::convert($xml, "#FFFFFF"); header("Content-Type: image/png"); echo mxUtils::encodeImage($image); } else { main(); } ?>