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<!--
Copyright (c) 2006-2013, JGraph Ltd
Layers example for mxGraph. This example demonstrates using
multiple layers to contain cells.
-->
<html>
<head>
<title>Layers 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 using a model
// with a custom root and two layers. Layers can also be added
// dynamically using var layer = model.add(root, new mxCell()).
var root = new mxCell();
var layer0 = root.insert(new mxCell());
var layer1 = root.insert(new mxCell());
var model = new mxGraphModel(root);
var graph = new mxGraph(container, model);
// Disables basic selection and cell handling
graph.setEnabled(false);
// 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
model.beginUpdate();
try
{
var v1 = graph.insertVertex(layer1, null, 'Hello,', 20, 20, 80, 30, 'fillColor=#C0C0C0');
var v2 = graph.insertVertex(layer1, null, 'Hello,', 200, 20, 80, 30, 'fillColor=#C0C0C0');
var v3 = graph.insertVertex(layer0, null, 'World!', 110, 150, 80, 30);
var e1 = graph.insertEdge(layer1, null, '', v1, v3, 'strokeColor=#0C0C0C');
e1.geometry.points = [new mxPoint(60, 165)];
var e2 = graph.insertEdge(layer0, null, '', v2, v3);
e2.geometry.points = [new mxPoint(240, 165)];
var e3 = graph.insertEdge(layer0, null, '', v1, v2,
'edgeStyle=topToBottomEdgeStyle');
e3.geometry.points = [new mxPoint(150, 30)];
var e4 = graph.insertEdge(layer1, null, '', v2, v1,
'strokeColor=#0C0C0C;edgeStyle=topToBottomEdgeStyle');
e4.geometry.points = [new mxPoint(150, 40)];
}
finally
{
// Updates the display
model.endUpdate();
}
document.body.appendChild(mxUtils.button('Layer 0', function()
{
model.setVisible(layer0, !model.isVisible(layer0));
}));
document.body.appendChild(mxUtils.button('Layer 1', function()
{
model.setVisible(layer1, !model.isVisible(layer1));
}));
}
};
</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;position:relative;width:321px;height:241px;background:url('editors/images/grid.gif')">
</div>
</body>
</html>