mxgraph/javascript/examples/codec.html at master · JavaScriptIOT/mxgraph

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<!--

Codec example for mxGraph. This example demonstrates dynamically

creating a graph from XML and encoding the model into XML, as well

as changing the default style for edges in-place.

-->

<html>

<head>

<title>Codec example for mxGraph</title>

mxBasePath = '../src';

</script>

// 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)

{

if (mxClient.isBrowserSupported())

{

var divs = document.getElementsByTagName('*');

for (var i = 0; i < divs.length; i++)

{

if (divs[i].className.toString().indexOf('mxgraph') >= 0)

{

(function(container)

{

var xml = mxUtils.getTextContent(container);

var xmlDocument = mxUtils.parseXml(xml);

if (xmlDocument.documentElement != null && xmlDocument.documentElement.nodeName == 'mxGraphModel')

{

var decoder = new mxCodec(xmlDocument);

var node = xmlDocument.documentElement;

container.innerHTML = '';

var graph = new mxGraph(container);

graph.centerZoom = false;

graph.setTooltips(false);

graph.setEnabled(false);

// Changes the default style for edges "in-place"

var style = graph.getStylesheet().getDefaultEdgeStyle();

style[mxConstants.STYLE_EDGE] = mxEdgeStyle.ElbowConnector;

// Enables panning with left mouse button

graph.panningHandler.useLeftButtonForPanning = true;

graph.panningHandler.ignoreCell = true;

graph.container.style.cursor = 'move';

graph.setPanning(true);

if (divs[i].style.width == '' && divs[i].style.height == '')

{

graph.resizeContainer = true;

}

else

{

// Adds border for fixed size boxes

graph.border = 20;

}

decoder.decode(node, graph.getModel());

graph.resizeContainer = false;

// Adds zoom buttons in top, left corner

var buttons = document.createElement('div');

buttons.style.position = 'absolute';

buttons.style.overflow = 'visible';

var bs = graph.getBorderSizes();

buttons.style.top = (container.offsetTop + bs.y) + 'px';

buttons.style.left = (container.offsetLeft + bs.x) + 'px';

var left = 0;

var bw = 16;

var bh = 16;

if (mxClient.IS_QUIRKS)

{

bw -= 1;

bh -= 1;

}

function addButton(label, funct)

{

var btn = document.createElement('div');

mxUtils.write(btn, label);

btn.style.position = 'absolute';

btn.style.backgroundColor = 'transparent';

btn.style.border = '1px solid gray';

btn.style.textAlign = 'center';

btn.style.fontSize = '10px';

btn.style.cursor = 'hand';

btn.style.width = bw + 'px';

btn.style.height = bh + 'px';

btn.style.left = left + 'px';

btn.style.top = '0px';

mxEvent.addListener(btn, 'click', function(evt)

{

funct();

mxEvent.consume(evt);

});

left += bw;

buttons.appendChild(btn);

};

addButton('+', function()

{

graph.zoomIn();

});

addButton('-', function()

{

graph.zoomOut();

});

if (container.nextSibling != null)

{

container.parentNode.insertBefore(buttons, container.nextSibling);

}

else

{

container.appendChild(buttons);

}

})(divs[i]);

}

};

</script>

</head>

<body>