/**
* Function: main
*
* Demonstrates the deployment of a graph which is created on the server side
* and then deployed with the client library in a single response. This is done
* by replacing the %graph% placeholder in the javascript/example/template.html
* file with the XML representation of the graph that was created on the server.
*
* Point your browser to http://localhost/graph to fetch the HTML file. Make sure
* to deploy the mxgraph distribution directory to the webroot for this example
* to work, or replace the mxBasePath and URL for the mxClient.js in the
* template to match your environment.
*
* This example returns an HTML page when the client issues a get request. The
* readme in the php directory explains how to run this example.
*
* The template.html file is used by this example. In main a graph is created
* and the XML of the graph obtained by:
*
* $enc = new mxCodec();
* $xmlNode = $enc->encode($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:
*
* <body onload="main(document.getElementById('graphContainer'), '%graph%');">
*
* 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;
}