maxGraph/javascript/examples/graphlayout.html

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<!--
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$Id: graphlayout.html,v 1.2 2013/10/28 08:44:57 gaudenz Exp $
Copyright (c) 2006-2013, JGraph Ltd
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Graphlayout example for mxGraph. This example demonstrates using
automatic graph layouts and listening to changes of the graph size
to keep the container size in sync.
-->
<html>
<head>
<title>Graphlayout 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 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);
// Disables basic selection and cell handling
graph.setEnabled(false);
// Changes the default vertex style in-place
var style = graph.getStylesheet().getDefaultVertexStyle();
style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_ELLIPSE;
style[mxConstants.STYLE_PERIMETER] = mxPerimeter.EllipsePerimeter;
style[mxConstants.STYLE_GRADIENTCOLOR] = 'white';
style[mxConstants.STYLE_FONTSIZE] = '10';
// Updates the size of the container to match
// the size of the graph when it changes. If
// this is commented-out, and the DIV style's
// overflow is set to "auto", then scrollbars
// will appear for the diagram. If overflow is
// set to "visible", then the diagram will be
// visible even when outside the parent DIV.
// With the code below, the parent DIV will be
// resized to contain the complete graph.
//graph.setResizeContainer(true);
// Larger grid size yields cleaner layout result
graph.gridSize = 40;
// Gets the default parent for inserting new cells. This
// is normally the first child of the root (ie. layer 0).
var parent = graph.getDefaultParent();
// Creates a layout algorithm to be used
// with the graph
var layout = new mxFastOrganicLayout(graph);
// Moves stuff wider apart than usual
layout.forceConstant = 80;
// Reference to the transition checkbox
var animate = document.getElementById('animate');
// Adds a button to execute the layout
document.body.insertBefore(mxUtils.button('Circle Layout',
function(evt)
{
graph.getModel().beginUpdate();
try
{
// Creates a layout algorithm to be used
// with the graph
var circleLayout = new mxCircleLayout(graph);
circleLayout.execute(parent);
}
catch (e)
{
throw e;
}
finally
{
if (animate.checked)
{
var morph = new mxMorphing(graph);
morph.addListener(mxEvent.DONE, function()
{
graph.getModel().endUpdate();
});
morph.startAnimation();
}
else
{
graph.getModel().endUpdate();
}
}
}
), document.body.firstChild);
// Adds a button to execute the layout
document.body.insertBefore(mxUtils.button('Organic Layout',
function(evt)
{
graph.getModel().beginUpdate();
try
{
layout.execute(parent);
}
catch (e)
{
throw e;
}
finally
{
if (animate.checked)
{
// Default values are 6, 1.5, 20
var morph = new mxMorphing(graph, 10, 1.7, 20);
morph.addListener(mxEvent.DONE, function()
{
graph.getModel().endUpdate();
});
morph.startAnimation();
}
else
{
graph.getModel().endUpdate();
}
}
}
), document.body.firstChild);
// Adds cells to the model in a single step
graph.getModel().beginUpdate();
var w = 30;
var h = 30;
try
{
var v1 = graph.insertVertex(parent, null, 'A', 0, 0, w, h);
var v2 = graph.insertVertex(parent, null, 'B', 0, 0, w, h);
var v3 = graph.insertVertex(parent, null, 'C', 0, 0, w, h);
var v4 = graph.insertVertex(parent, null, 'D', 0, 0, w, h);
var v5 = graph.insertVertex(parent, null, 'E', 0, 0, w, h);
var v6 = graph.insertVertex(parent, null, 'F', 0, 0, w, h);
var v7 = graph.insertVertex(parent, null, 'G', 0, 0, w, h);
var v8 = graph.insertVertex(parent, null, 'H', 0, 0, w, h);
var e1 = graph.insertEdge(parent, null, 'ab', v1, v2);
var e2 = graph.insertEdge(parent, null, 'ac', v1, v3);
var e3 = graph.insertEdge(parent, null, 'cd', v3, v4);
var e4 = graph.insertEdge(parent, null, 'be', v2, v5);
var e5 = graph.insertEdge(parent, null, 'cf', v3, v6);
var e6 = graph.insertEdge(parent, null, 'ag', v1, v7);
var e7 = graph.insertEdge(parent, null, 'gh', v7, v8);
var e8 = graph.insertEdge(parent, null, 'gc', v7, v3);
var e9 = graph.insertEdge(parent, null, 'gd', v7, v4);
var e10 = graph.insertEdge(parent, null, 'eh', v5, v8);
// Executes the layout
layout.execute(parent);
}
finally
{
// Updates the display
graph.getModel().endUpdate();
}
}
};
</script>
</head>
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<!-- Page passes the container for the graph to the program -->
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<body onload="main(document.getElementById('graphContainer'))">
<!-- Creates a container for the graph with a grid wallpaper. Make sure to define the position
and overflow attributes! See comments on the adding of the size-listener on line 54 ff! -->
<div id="graphContainer"
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style="position:relative;overflow:visible;width:821px;height:641px;background:url('editors/images/grid.gif');">
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</div>
<br>
<input type="checkbox" id="animate" checked="checked"/> Transitions
</body>
</html>