<!--
Copyright (c) 2006-2014, JGraph Ltd
Handles example for mxGraph. This example demonstrates using mxHandle to change custom styles interactively.
-->
<html>
<head>
<title>Handles 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">
function MyShape()
{
mxCylinder.call(this);
};
mxUtils.extend(MyShape, mxCylinder);
MyShape.prototype.defaultPos1 = 20;
MyShape.prototype.defaultPos2 = 60;
MyShape.prototype.getLabelBounds = function(rect)
{
var pos1 = mxUtils.getValue(this.style, 'pos1', this.defaultPos1) * this.scale;
var pos2 = mxUtils.getValue(this.style, 'pos2', this.defaultPos2) * this.scale;
return new mxRectangle(rect.x, rect.y + pos1, rect.width, Math.min(rect.height, pos2) - Math.max(0, pos1));
};
MyShape.prototype.redrawPath = function(path, x, y, w, h, isForeground)
{
var pos1 = mxUtils.getValue(this.style, 'pos1', this.defaultPos1);
var pos2 = mxUtils.getValue(this.style, 'pos2', this.defaultPos2);
if (isForeground)
{
if (pos1 < h)
{
path.moveTo(0, pos1);
path.lineTo(w, pos1);
}
if (pos2 < h)
{
path.moveTo(0, pos2);
path.lineTo(w, pos2);
}
}
else
{
path.rect(0, 0, w, h);
}
};
mxCellRenderer.registerShape('myShape', MyShape);
mxVertexHandler.prototype.createCustomHandles = function()
{
if (this.state.style['shape'] == 'myShape')
{
// Implements the handle for the first divider
var firstHandle = new mxHandle(this.state);
firstHandle.getPosition = function(bounds)
{
var pos2 = Math.max(0, Math.min(bounds.height, parseFloat(mxUtils.getValue(this.state.style, 'pos2', MyShape.prototype.defaultPos2))));
var pos1 = Math.max(0, Math.min(pos2, parseFloat(mxUtils.getValue(this.state.style, 'pos1', MyShape.prototype.defaultPos1))));
return new mxPoint(bounds.getCenterX(), bounds.y + pos1);
};
firstHandle.setPosition = function(bounds, pt)
{
var pos2 = Math.max(0, Math.min(bounds.height, parseFloat(mxUtils.getValue(this.state.style, 'pos2', MyShape.prototype.defaultPos2))));
this.state.style['pos1'] = Math.round(Math.max(0, Math.min(pos2, pt.y - bounds.y)));
};
firstHandle.execute = function()
{
this.copyStyle('pos1');
}
firstHandle.ignoreGrid = true;
// Implements the handle for the second divider
var secondHandle = new mxHandle(this.state);
secondHandle.getPosition = function(bounds)
{
var pos1 = Math.max(0, Math.min(bounds.height, parseFloat(mxUtils.getValue(this.state.style, 'pos1', MyShape.prototype.defaultPos1))));
var pos2 = Math.max(pos1, Math.min(bounds.height, parseFloat(mxUtils.getValue(this.state.style, 'pos2', MyShape.prototype.defaultPos2))));
return new mxPoint(bounds.getCenterX(), bounds.y + pos2);
};
secondHandle.setPosition = function(bounds, pt)
{
var pos1 = Math.max(0, Math.min(bounds.height, parseFloat(mxUtils.getValue(this.state.style, 'pos1', MyShape.prototype.defaultPos1))));
this.state.style['pos2'] = Math.round(Math.max(pos1, Math.min(bounds.height, pt.y - bounds.y)));
};
secondHandle.execute = function()
{
this.copyStyle('pos2');
}
secondHandle.ignoreGrid = true;
return [firstHandle, secondHandle];
}
return null;
};
mxVertexHandler.prototype.livePreview = true;
mxVertexHandler.prototype.rotationEnabled = true;
// 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
{
// Disables the built-in context menu
mxEvent.disableContextMenu(container);
// Creates the graph inside the given container
var graph = new mxGraph(container);
graph.setCellsCloneable(true);
graph.setHtmlLabels(true);
graph.setPanning(true);
graph.centerZoom = false;
// 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, 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.',
20, 20, 240, 120, 'shape=myShape;whiteSpace=wrap;overflow=hidden;pos1=30;pos2=80;');
}
finally
{
// Updates the display
graph.getModel().endUpdate();
}
document.body.appendChild(mxUtils.button('+', function()
{
graph.zoomIn();
}));
document.body.appendChild(mxUtils.button('-', function()
{
graph.zoomOut();
}));
}
};
</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:621px;height:441px;background:url('editors/images/grid.gif');cursor:default;">
</div>
</body>
</html>