109 lines
3.0 KiB
HTML
109 lines
3.0 KiB
HTML
<!--
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Copyright (c) 2006-2013, JGraph Ltd
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JSON data example for mxGraph. This example demonstrates using
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JSON to encode/decode parts of the graph model in mxCodec.
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-->
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<html>
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<head>
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<title>JSON data example for mxGraph</title>
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<!-- Sets the basepath for the library if not in same directory -->
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<script type="text/javascript">
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mxBasePath = '../src';
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</script>
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<!-- Loads and initializes the library -->
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<script type="text/javascript" src="../src/js/mxClient.js"></script>
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<!-- Example code -->
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<script type="text/javascript">
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// Program starts here. Creates a sample graph in the
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// DOM node with the specified ID. This function is invoked
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// from the onLoad event handler of the document (see below).
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function main(container)
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{
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// Checks if the browser is supported
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if (!mxClient.isBrowserSupported())
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{
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// Displays an error message if the browser is not supported.
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mxUtils.error('Browser is not supported!', 200, false);
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}
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else
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{
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// Disables the built-in context menu
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mxEvent.disableContextMenu(container);
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// Creates the graph inside the given container
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var graph = new mxGraph(container);
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// Enables rubberband selection
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new mxRubberband(graph);
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// Gets the default parent for inserting new cells. This
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// is normally the first child of the root (ie. layer 0).
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var parent = graph.getDefaultParent();
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// Adds cells to the model in a single step
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graph.getModel().beginUpdate();
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try
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{
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var v1 = graph.insertVertex(parent, null, 'Hello,', 20, 20, 80, 30);
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v1.data = new CustomData('v1');
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var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
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v2.data = new CustomData('v2');
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var e1 = graph.insertEdge(parent, null, '', v1, v2);
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}
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finally
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{
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// Updates the display
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graph.getModel().endUpdate();
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}
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}
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// Adds an option to view the XML of the graph
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document.body.appendChild(mxUtils.button('View XML', function()
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{
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var encoder = new mxCodec();
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var node = encoder.encode(graph.getModel());
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mxUtils.popup(mxUtils.getXml(node), true);
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}));
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};
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function CustomData(value)
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{
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this.value = value;
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}
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var codec = new mxObjectCodec(new CustomData());
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codec.encode = function(enc, obj)
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{
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var node = enc.document.createElement('CustomData');
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mxUtils.setTextContent(node, JSON.stringify(obj));
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return node;
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};
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codec.decode = function(dec, node, into)
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{
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var obj = JSON.parse(mxUtils.getTextContent(node));
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obj.constructor = CustomData;
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return obj;
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};
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mxCodecRegistry.register(codec);
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</script>
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</head>
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<!-- Page passes the container for the graph to the program -->
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<body onload="main(document.getElementById('graphContainer'))">
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<!-- Creates a container for the graph with a grid wallpaper -->
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<div id="graphContainer"
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style="position:relative;overflow:hidden;width:321px;height:241px;background:url('editors/images/grid.gif');cursor:default;">
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</div>
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</body>
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</html>
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