<!--
Copyright (c) 2006-2013, JGraph Ltd
Shape example for mxGraph. This example demonstrates how to
implement and use a custom shape.
-->
<html>
<head>
<title>Shape 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 custom shape -->
<script type="text/javascript">
/*
The example shape is a "3D box" that looks like this:
____
/ /|
/___/ |
| | /
|___|/
The code below defines the shape. The BoxShape function
it the constructor which creates a new object instance.
*/
function BoxShape()
{
mxCylinder.call(this);
};
/*
The next lines use an mxCylinder instance to augment the
prototype of the shape ("inheritance") and reset the
constructor to the topmost function of the c'tor chain.
*/
mxUtils.extend(BoxShape, mxCylinder);
// Defines the extrusion of the box as a "static class variable"
BoxShape.prototype.extrude = 10;
/*
Next, the mxCylinder's redrawPath method is "overridden".
This method has a isForeground argument to separate two
paths, one for the background (which must be closed and
might be filled) and one for the foreground, which is
just a stroke.
Foreground: /
_____/
|
|
____
Background: / |
/ |
| /
|____/
*/
BoxShape.prototype.redrawPath = function(path, x, y, w, h, isForeground)
{
var dy = this.extrude * this.scale;
var dx = this.extrude * this.scale;
if (isForeground)
{
path.moveTo(0, dy);
path.lineTo(w - dx, dy);
path.lineTo(w, 0);
path.moveTo(w - dx, dy);
path.lineTo(w - dx, h);
}
else
{
path.moveTo(0, dy);
path.lineTo(dx, 0);
path.lineTo(w, 0);
path.lineTo(w, h - dy);
path.lineTo(w - dx, h);
path.lineTo(0, h);
path.lineTo(0, dy);
path.lineTo(dx, 0);
path.close();
}
};
mxCellRenderer.registerShape('box', BoxShape);
</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 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 DOM node.
var graph = new mxGraph(container);
// Disables basic selection and cell handling
graph.setEnabled(false);
// Changes the default style for vertices "in-place"
// to use the custom shape.
var style = graph.getStylesheet().getDefaultVertexStyle();
style[mxConstants.STYLE_SHAPE] = 'box';
// Adds a spacing for the label that matches the
// extrusion size
style[mxConstants.STYLE_SPACING_TOP] = BoxShape.prototype.extrude;
style[mxConstants.STYLE_SPACING_RIGHT] = BoxShape.prototype.extrude;
// Adds a gradient and shadow to improve the user experience
style[mxConstants.STYLE_GRADIENTCOLOR] = '#FFFFFF';
style[mxConstants.STYLE_SHADOW] = true;
// 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, 'Custom', 20, 20, 80, 60);
var v2 = graph.insertVertex(parent, null, 'Shape', 200, 150, 80, 60);
var e1 = graph.insertEdge(parent, null, '', v1, v2);
}
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;width:321px;height:241px;background:url('editors/images/grid.gif')">
</div>
</body>
</html>