<!--
Copyright (c) 2006-2013, JGraph Ltd
Hello, World! example for mxGraph. This example demonstrates creating
permissions to define the available operations a the graph.
-->
<html>
<head>
<title>Permissions 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()
{
// 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
{
// Defines an icon for creating new connections in the connection handler.
// This will automatically disable the highlighting of the source vertex.
mxConnectionHandler.prototype.connectImage = new mxImage('images/connector.gif', 16, 16);
// Creates the div for the graph
var container = document.createElement('div');
container.style.position = 'absolute';
container.style.overflow = 'hidden';
container.style.left = '00px';
container.style.top = '40px';
container.style.right = '0px';
container.style.bottom = '0px';
container.style.background = 'url("editors/images/grid.gif")';
document.body.appendChild(container);
// Workaround for Internet Explorer ignoring certain styles
if (mxClient.IS_QUIRKS)
{
document.body.style.overflow = 'hidden';
new mxDivResizer(container);
}
// Creates the graph inside the given container
var graph = new mxGraph(container);
// Enable tooltips, disables mutligraphs, enable loops
graph.setMultigraph(false);
graph.setAllowLoops(true);
// Enables rubberband selection and key handling
var rubberband = new mxRubberband(graph);
var keyHandler = new mxKeyHandler(graph);
// Assigns the delete key
keyHandler.bindKey(46, function(evt)
{
if (graph.isEnabled())
{
graph.removeCells();
}
});
// Shared variable between child function scopes
// aka "private" variable
var currentPermission = null;
var apply = function(permission)
{
graph.clearSelection();
permission.apply(graph);
graph.setEnabled(true);
graph.setTooltips(true);
// Updates the icons on the shapes - rarely
// needed and very slow for large graphs
graph.refresh();
currentPermission = permission;
};
apply(new Permission());
var button = mxUtils.button('Allow All', function(evt)
{
apply(new Permission());
});
document.body.appendChild(button);
var button = mxUtils.button('Connect Only', function(evt)
{
apply(new Permission(false, true, false, false, true));
});
document.body.appendChild(button);
var button = mxUtils.button('Edges Only', function(evt)
{
apply(new Permission(false, false, true, false, false));
});
document.body.appendChild(button);
var button = mxUtils.button('Vertices Only', function(evt)
{
apply(new Permission(false, false, false, true, false));
});
document.body.appendChild(button);
var button = mxUtils.button('Select Only', function(evt)
{
apply(new Permission(false, false, false, false, false));
});
document.body.appendChild(button);
var button = mxUtils.button('Locked', function(evt)
{
apply(new Permission(true, false));
});
document.body.appendChild(button);
var button = mxUtils.button('Disabled', function(evt)
{
graph.clearSelection();
graph.setEnabled(false);
graph.setTooltips(false);
});
document.body.appendChild(button);
// Extends hook functions to use permission object. This could
// be done by assigning the respective switches (eg.
// setMovable), but this approach is more flexible, doesn't
// override any existing behaviour or settings, and allows for
// dynamic conditions to be used in the functions. See the
// specification for more functions to extend (eg.
// isSelectable).
var oldDisconnectable = graph.isCellDisconnectable;
graph.isCellDisconnectable = function(cell, terminal, source)
{
return oldDisconnectable.apply(this, arguments) &&
currentPermission.editEdges;
};
var oldTerminalPointMovable = graph.isTerminalPointMovable;
graph.isTerminalPointMovable = function(cell)
{
return oldTerminalPointMovable.apply(this, arguments) &&
currentPermission.editEdges;
};
var oldBendable = graph.isCellBendable;
graph.isCellBendable = function(cell)
{
return oldBendable.apply(this, arguments) &&
currentPermission.editEdges;
};
var oldLabelMovable = graph.isLabelMovable;
graph.isLabelMovable = function(cell)
{
return oldLabelMovable.apply(this, arguments) &&
currentPermission.editEdges;
};
var oldMovable = graph.isCellMovable;
graph.isCellMovable = function(cell)
{
return oldMovable.apply(this, arguments) &&
currentPermission.editVertices;
};
var oldResizable = graph.isCellResizable;
graph.isCellResizable = function(cell)
{
return oldResizable.apply(this, arguments) &&
currentPermission.editVertices;
};
var oldEditable = graph.isCellEditable;
graph.isCellEditable = function(cell)
{
return oldEditable.apply(this, arguments) &&
(this.getModel().isVertex(cell) &&
currentPermission.editVertices) ||
(this.getModel().isEdge(cell) &&
currentPermission.editEdges);
};
var oldDeletable = graph.isCellDeletable;
graph.isCellDeletable = function(cell)
{
return oldDeletable.apply(this, arguments) &&
(this.getModel().isVertex(cell) &&
currentPermission.editVertices) ||
(this.getModel().isEdge(cell) &&
currentPermission.editEdges);
};
var oldCloneable = graph.isCellCloneable;
graph.isCellCloneable = function(cell)
{
return oldCloneable.apply(this, arguments) &&
currentPermission.cloneCells;
};
// 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, 'Hello,', 20, 20, 80, 30);
var v2 = graph.insertVertex(parent, null, 'Hello,', 200, 20, 80, 30);
var v3 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
var e1 = graph.insertEdge(parent, null, 'Connection', v1, v3);
}
finally
{
// Updates the display
graph.getModel().endUpdate();
}
}
};
function Permission(locked, createEdges, editEdges, editVertices, cloneCells)
{
this.locked = (locked != null) ? locked : false;
this.createEdges = (createEdges != null) ? createEdges : true;
this.editEdges = (editEdges != null) ? editEdges : true;;
this.editVertices = (editVertices != null) ? editVertices : true;;
this.cloneCells = (cloneCells != null) ? cloneCells : true;;
};
Permission.prototype.apply = function(graph)
{
graph.setConnectable(this.createEdges);
graph.setCellsLocked(this.locked);
};
</script>
</head>
<!-- Page passes the container for the graph to the program -->
<body onload="main();">
</body>
</html>