<!--
Copyright (c) 2006-2013, JGraph Ltd
Autolayout example for mxGraph. This example demonstrates running
and animating a layout algorithm after every change to a graph.
-->
<html>
<head>
<title>Auto layout 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
{
mxEvent.disableContextMenu(container);
var mxCellRendererInstallCellOverlayListeners = mxCellRenderer.prototype.installCellOverlayListeners;
mxCellRenderer.prototype.installCellOverlayListeners = function(state, overlay, shape)
{
mxCellRendererInstallCellOverlayListeners.apply(this, arguments);
mxEvent.addListener(shape.node, (mxClient.IS_POINTER) ? 'pointerdown' : 'mousedown', function (evt)
{
overlay.fireEvent(new mxEventObject('pointerdown', 'event', evt, 'state', state));
});
if (!mxClient.IS_POINTER && mxClient.IS_TOUCH)
{
mxEvent.addListener(shape.node, 'touchstart', function (evt)
{
overlay.fireEvent(new mxEventObject('pointerdown', 'event', evt, 'state', state));
});
}
};
// Creates the graph inside the given container
var graph = new mxGraph(container);
graph.setPanning(true);
graph.panningHandler.useLeftButtonForPanning = true;
graph.setAllowDanglingEdges(false);
graph.connectionHandler.select = false;
graph.view.setTranslate(20, 20);
// 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();
var addOverlay = function(cell)
{
// Creates a new overlay with an image and a tooltip
var overlay = new mxCellOverlay(new mxImage('images/add.png', 24, 24), 'Add outgoing');
overlay.cursor = 'hand';
// Installs a handler for clicks on the overlay
overlay.addListener(mxEvent.CLICK, function(sender, evt2)
{
graph.clearSelection();
var geo = graph.getCellGeometry(cell);
var v2;
executeLayout(function()
{
v2 = graph.insertVertex(parent, null, 'World!', geo.x, geo.y, 80, 30);
addOverlay(v2);
graph.view.refresh(v2);
var e1 = graph.insertEdge(parent, null, '', cell, v2);
}, function()
{
graph.scrollCellToVisible(v2);
});
});
// Special CMS event
overlay.addListener('pointerdown', function(sender, eo)
{
var evt2 = eo.getProperty('event');
var state = eo.getProperty('state');
graph.popupMenuHandler.hideMenu();
graph.stopEditing(false);
var pt = mxUtils.convertPoint(graph.container,
mxEvent.getClientX(evt2), mxEvent.getClientY(evt2));
graph.connectionHandler.start(state, pt.x, pt.y);
graph.isMouseDown = true;
graph.isMouseTrigger = mxEvent.isMouseEvent(evt2);
mxEvent.consume(evt2);
});
// Sets the overlay for the cell in the graph
graph.addCellOverlay(cell, overlay);
}
// Adds cells to the model in a single step
graph.getModel().beginUpdate();
var v1;
try
{
v1 = graph.insertVertex(parent, null, 'Hello,', 0, 0, 80, 30);
addOverlay(v1);
}
finally
{
// Updates the display
graph.getModel().endUpdate();
}
var layout = new mxHierarchicalLayout(graph, mxConstants.DIRECTION_WEST);
var executeLayout = function(change, post)
{
graph.getModel().beginUpdate();
try
{
if (change != null)
{
change();
}
layout.execute(graph.getDefaultParent(), v1);
}
catch (e)
{
throw e;
}
finally
{
// New API for animating graph layout results asynchronously
var morph = new mxMorphing(graph);
morph.addListener(mxEvent.DONE, mxUtils.bind(this, function()
{
graph.getModel().endUpdate();
if (post != null)
{
post();
}
}));
morph.startAnimation();
}
};
var edgeHandleConnect = mxEdgeHandler.prototype.connect;
mxEdgeHandler.prototype.connect = function(edge, terminal, isSource, isClone, me)
{
edgeHandleConnect.apply(this, arguments);
executeLayout();
};
graph.resizeCell = function()
{
mxGraph.prototype.resizeCell.apply(this, arguments);
executeLayout();
};
graph.connectionHandler.addListener(mxEvent.CONNECT, function()
{
executeLayout();
});
}
};
</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="position:relative;overflow:hidden;width:821px;height:641px;background:url('editors/images/grid.gif');cursor:default;">
</div>
</body>
</html>