175 lines
4.9 KiB
HTML
175 lines
4.9 KiB
HTML
<!--
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Copyright (c) 2006-2013, JGraph Ltd
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HTML label example for mxGraph. This example demonstrates using
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HTML labels that are connected to the state of the user object.
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-->
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<html>
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<head>
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<title>HTML label 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 HTML labels
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graph.setHtmlLabels(true);
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// Enables rubberband selection
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new mxRubberband(graph);
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// Creates a user object that stores the state
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var doc = mxUtils.createXmlDocument();
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var obj = doc.createElement('UserObject');
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obj.setAttribute('label', 'Hello, World!');
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obj.setAttribute('checked', 'false');
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// Adds optional caching for the HTML label
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var cached = true;
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if (cached)
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{
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// Ignores cached label in codec
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mxCodecRegistry.getCodec(mxCell).exclude.push('div');
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// Invalidates cached labels
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graph.model.setValue = function(cell, value)
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{
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cell.div = null;
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mxGraphModel.prototype.setValue.apply(this, arguments);
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};
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}
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// Overrides method to provide a cell label in the display
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graph.convertValueToString = function(cell)
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{
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if (cached && cell.div != null)
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{
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// Uses cached label
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return cell.div;
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}
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else if (mxUtils.isNode(cell.value) && cell.value.nodeName.toLowerCase() == 'userobject')
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{
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// Returns a DOM for the label
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var div = document.createElement('div');
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div.innerHTML = cell.getAttribute('label');
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mxUtils.br(div);
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var checkbox = document.createElement('input');
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checkbox.setAttribute('type', 'checkbox');
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if (cell.getAttribute('checked') == 'true')
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{
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checkbox.setAttribute('checked', 'checked');
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checkbox.defaultChecked = true;
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}
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// Writes back to cell if checkbox is clicked
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mxEvent.addListener(checkbox, (mxClient.IS_QUIRKS) ? 'click' : 'change', function(evt)
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{
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var elt = cell.value.cloneNode(true);
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elt.setAttribute('checked', (checkbox.checked) ? 'true' : 'false');
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graph.model.setValue(cell, elt);
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});
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div.appendChild(checkbox);
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if (cached)
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{
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// Caches label
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cell.div = div;
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}
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return div;
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}
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return '';
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};
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// Overrides method to store a cell label in the model
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var cellLabelChanged = graph.cellLabelChanged;
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graph.cellLabelChanged = function(cell, newValue, autoSize)
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{
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if (mxUtils.isNode(cell.value) && cell.value.nodeName.toLowerCase() == 'userobject')
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{
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// Clones the value for correct undo/redo
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var elt = cell.value.cloneNode(true);
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elt.setAttribute('label', newValue);
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newValue = elt;
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}
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cellLabelChanged.apply(this, arguments);
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};
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// Overrides method to create the editing value
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var getEditingValue = graph.getEditingValue;
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graph.getEditingValue = function(cell)
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{
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if (mxUtils.isNode(cell.value) && cell.value.nodeName.toLowerCase() == 'userobject')
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{
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return cell.getAttribute('label');
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}
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};
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var parent = graph.getDefaultParent();
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graph.insertVertex(parent, null, obj, 20, 20, 80, 60);
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// Undo/redo
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var undoManager = new mxUndoManager();
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var listener = function(sender, evt)
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{
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undoManager.undoableEditHappened(evt.getProperty('edit'));
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};
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graph.getModel().addListener(mxEvent.UNDO, listener);
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graph.getView().addListener(mxEvent.UNDO, listener);
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document.body.appendChild(mxUtils.button('Undo', function()
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{
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undoManager.undo();
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}));
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document.body.appendChild(mxUtils.button('Redo', function()
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{
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undoManager.redo();
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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: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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