<!--
Copyright (c) 2006-2013, JGraph Ltd
Hover icons example for mxGraph. This example demonstrates showing
icons on vertices as mouse hovers over them.
-->
<html>
<head>
<title>Hover 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 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);
// Defines a new class for all icons
function mxIconSet(state)
{
this.images = [];
var graph = state.view.graph;
// Icon1
var img = mxUtils.createImage('images/copy.png');
img.setAttribute('title', 'Duplicate');
img.style.position = 'absolute';
img.style.cursor = 'pointer';
img.style.width = '16px';
img.style.height = '16px';
img.style.left = (state.x + state.width) + 'px';
img.style.top = (state.y + state.height) + 'px';
mxEvent.addGestureListeners(img,
mxUtils.bind(this, function(evt)
{
var s = graph.gridSize;
graph.setSelectionCells(graph.moveCells([state.cell], s, s, true));
mxEvent.consume(evt);
this.destroy();
})
);
state.view.graph.container.appendChild(img);
this.images.push(img);
// Delete
var img = mxUtils.createImage('images/delete2.png');
img.setAttribute('title', 'Delete');
img.style.position = 'absolute';
img.style.cursor = 'pointer';
img.style.width = '16px';
img.style.height = '16px';
img.style.left = (state.x + state.width) + 'px';
img.style.top = (state.y - 16) + 'px';
mxEvent.addGestureListeners(img,
mxUtils.bind(this, function(evt)
{
// Disables dragging the image
mxEvent.consume(evt);
})
);
mxEvent.addListener(img, 'click',
mxUtils.bind(this, function(evt)
{
graph.removeCells([state.cell]);
mxEvent.consume(evt);
this.destroy();
})
);
state.view.graph.container.appendChild(img);
this.images.push(img);
};
mxIconSet.prototype.destroy = function()
{
if (this.images != null)
{
for (var i = 0; i < this.images.length; i++)
{
var img = this.images[i];
img.parentNode.removeChild(img);
}
}
this.images = 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);
// Defines the tolerance before removing the icons
var iconTolerance = 20;
// Shows icons if the mouse is over a cell
graph.addMouseListener(
{
currentState: null,
currentIconSet: null,
mouseDown: function(sender, me)
{
// Hides icons on mouse down
if (this.currentState != null)
{
this.dragLeave(me.getEvent(), this.currentState);
this.currentState = null;
}
},
mouseMove: function(sender, me)
{
if (this.currentState != null && (me.getState() == this.currentState ||
me.getState() == null))
{
var tol = iconTolerance;
var tmp = new mxRectangle(me.getGraphX() - tol,
me.getGraphY() - tol, 2 * tol, 2 * tol);
if (mxUtils.intersects(tmp, this.currentState))
{
return;
}
}
var tmp = graph.view.getState(me.getCell());
// Ignores everything but vertices
if (graph.isMouseDown || (tmp != null && !graph.getModel().isVertex(tmp.cell)))
{
tmp = null;
}
if (tmp != this.currentState)
{
if (this.currentState != null)
{
this.dragLeave(me.getEvent(), this.currentState);
}
this.currentState = tmp;
if (this.currentState != null)
{
this.dragEnter(me.getEvent(), this.currentState);
}
}
},
mouseUp: function(sender, me) { },
dragEnter: function(evt, state)
{
if (this.currentIconSet == null)
{
this.currentIconSet = new mxIconSet(state);
}
},
dragLeave: function(evt, state)
{
if (this.currentIconSet != null)
{
this.currentIconSet.destroy();
this.currentIconSet = null;
}
}
});
// 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>