<!--
Copyright (c) 2006-2013, JGraph Ltd
Context icons example for mxGraph. This example demonstrates adding
icons to selected vertices to carry out special operations.
-->
<html>
<head>
<title>Context icons 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">
// Defines a subclass for mxVertexHandler that adds a set of clickable
// icons to every selected vertex.
function mxVertexToolHandler(state)
{
mxVertexHandler.apply(this, arguments);
};
mxVertexToolHandler.prototype = new mxVertexHandler();
mxVertexToolHandler.prototype.constructor = mxVertexToolHandler;
mxVertexToolHandler.prototype.domNode = null;
mxVertexToolHandler.prototype.init = function()
{
mxVertexHandler.prototype.init.apply(this, arguments);
// In this example we force the use of DIVs for images in IE. This
// handles transparency in PNG images properly in IE and fixes the
// problem that IE routes all mouse events for a gesture via the
// initial IMG node, which means the target vertices
this.domNode = document.createElement('div');
this.domNode.style.position = 'absolute';
this.domNode.style.whiteSpace = 'nowrap';
// Workaround for event redirection via image tag in quirks and IE8
function createImage(src)
{
if (mxClient.IS_IE && !mxClient.IS_SVG)
{
var img = document.createElement('div');
img.style.backgroundImage = 'url(' + src + ')';
img.style.backgroundPosition = 'center';
img.style.backgroundRepeat = 'no-repeat';
img.style.display = (mxClient.IS_QUIRKS) ? 'inline' : 'inline-block';
return img;
}
else
{
return mxUtils.createImage(src);
}
};
// Delete
var img = createImage('images/delete2.png');
img.setAttribute('title', 'Delete');
img.style.cursor = 'pointer';
img.style.width = '16px';
img.style.height = '16px';
mxEvent.addGestureListeners(img,
mxUtils.bind(this, function(evt)
{
// Disables dragging the image
mxEvent.consume(evt);
})
);
mxEvent.addListener(img, 'click',
mxUtils.bind(this, function(evt)
{
this.graph.removeCells([this.state.cell]);
mxEvent.consume(evt);
})
);
this.domNode.appendChild(img);
// Size
var img = createImage('images/fit_to_size.png');
img.setAttribute('title', 'Resize');
img.style.cursor = 'se-resize';
img.style.width = '16px';
img.style.height = '16px';
mxEvent.addGestureListeners(img,
mxUtils.bind(this, function(evt)
{
this.start(mxEvent.getClientX(evt), mxEvent.getClientY(evt), 7);
this.graph.isMouseDown = true;
this.graph.isMouseTrigger = mxEvent.isMouseEvent(evt);
mxEvent.consume(evt);
})
);
this.domNode.appendChild(img);
// Move
var img = createImage('images/plus.png');
img.setAttribute('title', 'Move');
img.style.cursor = 'move';
img.style.width = '16px';
img.style.height = '16px';
mxEvent.addGestureListeners(img,
mxUtils.bind(this, function(evt)
{
this.graph.graphHandler.start(this.state.cell,
mxEvent.getClientX(evt), mxEvent.getClientY(evt));
this.graph.graphHandler.cellWasClicked = true;
this.graph.isMouseDown = true;
this.graph.isMouseTrigger = mxEvent.isMouseEvent(evt);
mxEvent.consume(evt);
})
);
this.domNode.appendChild(img);
// Connect
var img = createImage('images/check.png');
img.setAttribute('title', 'Connect');
img.style.cursor = 'pointer';
img.style.width = '16px';
img.style.height = '16px';
mxEvent.addGestureListeners(img,
mxUtils.bind(this, function(evt)
{
var pt = mxUtils.convertPoint(this.graph.container,
mxEvent.getClientX(evt), mxEvent.getClientY(evt));
this.graph.connectionHandler.start(this.state, pt.x, pt.y);
this.graph.isMouseDown = true;
this.graph.isMouseTrigger = mxEvent.isMouseEvent(evt);
mxEvent.consume(evt);
})
);
this.domNode.appendChild(img);
this.graph.container.appendChild(this.domNode);
this.redrawTools();
};
mxVertexToolHandler.prototype.redraw = function()
{
mxVertexHandler.prototype.redraw.apply(this);
this.redrawTools();
};
mxVertexToolHandler.prototype.redrawTools = function()
{
if (this.state != null && this.domNode != null)
{
var dy = (mxClient.IS_VML && document.compatMode == 'CSS1Compat') ? 20 : 4;
this.domNode.style.left = (this.state.x + this.state.width - 56) + 'px';
this.domNode.style.top = (this.state.y + this.state.height + dy) + 'px';
}
};
mxVertexToolHandler.prototype.destroy = function(sender, me)
{
mxVertexHandler.prototype.destroy.apply(this, arguments);
if (this.domNode != null)
{
this.domNode.parentNode.removeChild(this.domNode);
this.domNode = null;
}
};
// 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
{
// Creates the graph inside the given container
var graph = new mxGraph(container);
graph.setConnectable(true);
graph.connectionHandler.createTarget = true;
graph.createHandler = function(state)
{
if (state != null &&
this.model.isVertex(state.cell))
{
return new mxVertexToolHandler(state);
}
return mxGraph.prototype.createHandler.apply(this, arguments);
};
// Uncomment the following if you want the container
// to fit the size of the graph
//graph.setResizeContainer(true);
// 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();
// 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, 'World!', 200, 150, 80, 30);
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');cursor:default;">
</div>
</body>
</html>