<!--
Copyright (c) 2006-2013, JGraph Ltd
Markers example for mxGraph. This example demonstrates creating
custom markers and customizing the built-in markers.
-->
<html>
<head>
<title>Markers 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
{
// Enables guides
mxGraphHandler.prototype.guidesEnabled = true;
mxEdgeHandler.prototype.snapToTerminals = true;
// Registers and defines the custom marker
mxMarker.addMarker('dash', function(canvas, shape, type, pe, unitX, unitY, size, source, sw, filled)
{
var nx = unitX * (size + sw + 1);
var ny = unitY * (size + sw + 1);
return function()
{
canvas.begin();
canvas.moveTo(pe.x - nx / 2 - ny / 2, pe.y - ny / 2 + nx / 2);
canvas.lineTo(pe.x + ny / 2 - 3 * nx / 2, pe.y - 3 * ny / 2 - nx / 2);
canvas.stroke();
};
});
// Defines custom message shape
function MessageShape()
{
mxCylinder.call(this);
};
mxUtils.extend(MessageShape, mxCylinder);
MessageShape.prototype.redrawPath = function(path, x, y, w, h, isForeground)
{
if (isForeground)
{
path.moveTo(0, 0);
path.lineTo(w / 2, h / 2);
path.lineTo(w, 0);
}
else
{
path.moveTo(0, 0);
path.lineTo(w, 0);
path.lineTo(w, h);
path.lineTo(0, h);
path.close();
}
};
// Registers the message shape
mxCellRenderer.registerShape('message', MessageShape);
// Defines custom edge shape
function LinkShape()
{
mxArrow.call(this);
};
mxUtils.extend(LinkShape, mxArrow);
LinkShape.prototype.paintEdgeShape = function(c, pts)
{
var width = 10;
// Base vector (between end points)
var p0 = pts[0];
var pe = pts[pts.length - 1];
var dx = pe.x - p0.x;
var dy = pe.y - p0.y;
var dist = Math.sqrt(dx * dx + dy * dy);
var length = dist;
// Computes the norm and the inverse norm
var nx = dx / dist;
var ny = dy / dist;
var basex = length * nx;
var basey = length * ny;
var floorx = width * ny/3;
var floory = -width * nx/3;
// Computes points
var p0x = p0.x - floorx / 2;
var p0y = p0.y - floory / 2;
var p1x = p0x + floorx;
var p1y = p0y + floory;
var p2x = p1x + basex;
var p2y = p1y + basey;
var p3x = p2x + floorx;
var p3y = p2y + floory;
// p4 not necessary
var p5x = p3x - 3 * floorx;
var p5y = p3y - 3 * floory;
c.begin();
c.moveTo(p1x, p1y);
c.lineTo(p2x, p2y);
c.moveTo(p5x + floorx, p5y + floory);
c.lineTo(p0x, p0y);
c.stroke();
};
// Registers the link shape
mxCellRenderer.registerShape('link', LinkShape);
// Creates the graph
var graph = new mxGraph(container);
// Sets default styles
var style = graph.getStylesheet().getDefaultVertexStyle();
style['fillColor'] = '#FFFFFF';
style['strokeColor'] = '#000000';
style['fontColor'] = '#000000';
style['fontStyle'] = '1';
style = graph.getStylesheet().getDefaultEdgeStyle();
style['strokeColor'] = '#000000';
style['fontColor'] = '#000000';
style['fontStyle'] = '0';
style['fontStyle'] = '0';
style['startSize'] = '8';
style['endSize'] = '8';
// Populates the graph
var parent = graph.getDefaultParent();
graph.getModel().beginUpdate();
try
{
var v1 = graph.insertVertex(parent, null, 'v1', 20, 20, 80, 30);
var v2 = graph.insertVertex(parent, null, 'v2', 440, 20, 80, 30);
var e1 = graph.insertEdge(parent, null, '', v1, v2, 'dashed=1;'+
'startArrow=oval;endArrow=block;sourcePerimeterSpacing=4;startFill=0;endFill=0;');
var e11 = graph.insertVertex(e1, null, 'Label', 0, 0, 20, 14,
'shape=message;labelBackgroundColor=#ffffff;labelPosition=left;spacingRight=2;align=right;fontStyle=0;');
e11.geometry.offset = new mxPoint(-10, -7);
e11.geometry.relative = true;
e11.connectable = false;
var v3 = graph.insertVertex(parent, null, 'v3', 20, 120, 80, 30);
var v4 = graph.insertVertex(parent, null, 'v4', 440, 120, 80, 30);
var e2 = graph.insertEdge(parent, null, 'Label', v3, v4,
'startArrow=dash;startSize=12;endArrow=block;labelBackgroundColor=#FFFFFF;');
var v5 = graph.insertVertex(parent, null, 'v5', 40, 220, 40, 40, 'shape=ellipse;perimeter=ellipsePerimeter;');
var v6 = graph.insertVertex(parent, null, 'v6', 460, 220, 40, 40, 'shape=doubleEllipse;perimeter=ellipsePerimeter;');
var e3 = graph.insertEdge(parent, null, 'Link', v5, v6,
'shape=link;labelBackgroundColor=#FFFFFF;');
}
finally
{
graph.getModel().endUpdate();
}
}
};
</script>
</head>
<body onload="main(document.getElementById('graphContainer'))">
<div id="graphContainer"
style="overflow:hidden;position:relative;width:641px;height:381px;border:1px solid gray;cursor:default;">
</div>
</body>
</html>