2013-06-28 19:07:06 +00:00
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<!--
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2013-10-28 08:56:36 +00:00
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Copyright (c) 2006-2013, JGraph Ltd
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2013-06-28 19:07:06 +00:00
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Level of detail example for mxGraph. This example demonstrates
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implementing a level of detail per cell.
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-->
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<html>
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<head>
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<title>Level of detail 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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// Creates the graph inside the given container
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var graph = new mxGraph(container);
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graph.centerZoom = false;
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// Links level of detail to zoom level but can be independent of zoom
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graph.isCellVisible = function(cell)
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{
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return cell.lod == null || cell.lod / 2 < this.view.scale;
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};
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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, '1', 20, 20, 80, 30);
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v1.lod = 1;
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var v2 = graph.insertVertex(parent, null, '1', 200, 150, 80, 30);
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v2.lod = 1;
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var v3 = graph.insertVertex(parent, null, '2', 20, 150, 40, 20);
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v3.lod = 2;
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var v4 = graph.insertVertex(parent, null, '3', 200, 10, 20, 20);
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v4.lod = 3;
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var e1 = graph.insertEdge(parent, null, '2', v1, v2, 'strokeWidth=2');
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e1.lod = 2;
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var e2 = graph.insertEdge(parent, null, '2', v3, v4, 'strokeWidth=2');
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e2.lod = 2;
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var e2 = graph.insertEdge(parent, null, '3', v1, v4, 'strokeWidth=1');
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e2.lod = 3;
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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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document.body.appendChild(mxUtils.button('+', function()
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{
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graph.zoomIn();
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}));
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document.body.appendChild(mxUtils.button('-', function()
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{
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graph.zoomOut();
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}));
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}
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};
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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:621px;height:441px;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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