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<!--
$Id: helloport.html,v 1.1 2012/11/15 13:26:39 gaudenz Exp $
Copyright (c) 2006-2010, JGraph Ltd
Hello, World! example for mxGraph. This example demonstrates using
the isPort hook for visually connecting to another cell.
-->
<html>
<head>
<title>Hello, World! example for mxGraph</title>
<!-- Sets the basepath for the library if not in same directory -->
<script type="text/javascript">
mxBasePath = '../src';
</script>
<!-- Loads and initializes the library -->
<script type="text/javascript" src="../src/js/mxClient.js"></script>
<!-- Example code -->
<script type="text/javascript">
// Program starts here. Creates a sample graph in the
// DOM node with the specified ID. This function is invoked
// from the onLoad event handler of the document (see below).
function main(container)
{
// Checks if the browser is supported
if (!mxClient.isBrowserSupported())
{
// Displays an error message if the browser is not supported.
mxUtils.error('Browser is not supported!', 200, false);
}
else
{
// Creates the graph inside the given container
var graph = new mxGraph(container);
graph.setConnectable(true);
graph.setTooltips(true);
// Sets the default edge style
var style = graph.getStylesheet().getDefaultEdgeStyle();
style[mxConstants.STYLE_EDGE] = mxEdgeStyle.ElbowConnector;
// Ports are not used as terminals for edges, they are
// only used to compute the graphical connection point
graph.isPort = function(cell)
{
var geo = this.getCellGeometry(cell);
return (geo != null) ? geo.relative : false;
};
// Implements a tooltip that shows the actual
// source and target of an edge
graph.getTooltipForCell = function(cell)
{
if (this.model.isEdge(cell))
{
return this.convertValueToString(this.model.getTerminal(cell, true)) + ' => ' +
this.convertValueToString(this.model.getTerminal(cell, false))
}
return mxGraph.prototype.getTooltipForCell.apply(this, arguments);
};
// Removes the folding icon and disables any folding
graph.isCellFoldable = function(cell)
{
return false;
};
// Enables rubberband selection
new mxRubberband(graph);
// Gets the default parent for inserting new cells. This
// is normally the first child of the root (ie. layer 0).
var parent = graph.getDefaultParent();
// Adds cells to the model in a single step
graph.getModel().beginUpdate();
try
{
var v1 = graph.insertVertex(parent, null, 'Hello', 20, 80, 80, 30);
v1.setConnectable(false);
var v11 = graph.insertVertex(v1, null, '', 1, 1, 10, 10);
v11.geometry.offset = new mxPoint(-5, -5);
v11.geometry.relative = true;
var v12 = graph.insertVertex(v1, null, '', 1, 0, 10, 10);
v12.geometry.offset = new mxPoint(-5, -5);
v12.geometry.relative = true;
var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
var v3 = graph.insertVertex(parent, null, 'World2', 200, 20, 80, 30);
var e1 = graph.insertEdge(parent, null, '', v11, v2);
var e1 = graph.insertEdge(parent, null, '', v12, v3);
}
finally
{
// Updates the display
graph.getModel().endUpdate();
}
var button = mxUtils.button('View XML', function()
{
var encoder = new mxCodec();
var node = encoder.encode(graph.getModel());
mxUtils.popup(mxUtils.getPrettyXml(node), true);
});
document.body.insertBefore(button, container.nextSibling);
}
};
</script>
</head>
<!-- Page passes the container for the graph to the program -->
<body onload="main(document.getElementById('graphContainer'))">
<!-- Creates a container for the graph with a grid wallpaper -->
<div id="graphContainer"
style="overflow:hidden;width:321px;height:241px;background:url('editors/images/grid.gif');cursor:default;">
</div>
</body>
</html>