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perimeter.html
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<!--
$Id: perimeter.html,v 1.1 2012/11/15 13:26:40 gaudenz Exp $
Copyright (c) 2006-2010, JGraph Ltd
Perimeter example for mxGraph. This example demonstrates how to
avoid edge and label intersections.
-->
<html>
<head>
<title>Perimeter 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
{
// Redirects the perimeter to the label bounds if intersection
// between edge and label is found
mxGraphViewGetPerimeterPoint = mxGraphView.prototype.getPerimeterPoint;
mxGraphView.prototype.getPerimeterPoint = function(terminal, next, orthogonal, border)
{
var point = mxGraphViewGetPerimeterPoint.apply(this, arguments);
if (point != null)
{
var perimeter = this.getPerimeterFunction(terminal);
if (terminal.text != null && terminal.text.boundingBox != null)
{
// Adds a small border to the label bounds
var b = terminal.text.boundingBox.clone();
b.grow(3)
if (mxUtils.rectangleIntersectsSegment(b, point, next))
{
point = perimeter(b, terminal, next, orthogonal);
}
}
}
return point;
};
// Creates the graph inside the given container
var graph = new mxGraph(container);
graph.setVertexLabelsMovable(true);
graph.setConnectable(true);
// Uncomment the following if you want the container
// to fit the size of the graph
//graph.setResizeContainer(true);
// 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, 'Label', 20, 20, 80, 30, 'verticalLabelPosition=bottom');
var v2 = graph.insertVertex(parent, null, 'Label', 200, 20, 80, 30, 'verticalLabelPosition=bottom');
var v3 = graph.insertVertex(parent, null, 'Label', 20, 150, 80, 30, 'verticalLabelPosition=bottom');
var e1 = graph.insertEdge(parent, null, '', v1, v2);
var e1 = graph.insertEdge(parent, null, '', v1, v3);
}
finally
{
// Updates the display
graph.getModel().endUpdate();
}
}
};
</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');cursor:default;">
</div>
</body>
</html>