122 lines
3.5 KiB
HTML
122 lines
3.5 KiB
HTML
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<!--
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Copyright (c) 2006-2013, JGraph Ltd
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Overlays example for mxGraph. This example demonstrates cell
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highlighting, overlays and handling click and double click
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events. See also: events.html for more event handling.
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-->
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<html>
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<head>
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<title>Overlays 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 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
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// 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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// Disables basic selection and cell handling
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graph.setEnabled(false);
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// Highlights the vertices when the mouse enters
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var highlight = new mxCellTracker(graph, '#00FF00');
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// Enables tooltips for the overlays
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graph.setTooltips(true);
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// Installs a handler for click events in the graph
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// that toggles the overlay for the respective cell
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graph.addListener(mxEvent.CLICK, function(sender, evt)
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{
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var cell = evt.getProperty('cell');
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if (cell != null)
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{
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var overlays = graph.getCellOverlays(cell);
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if (overlays == null)
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{
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// Creates a new overlay with an image and a tooltip
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var overlay = new mxCellOverlay(
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new mxImage('editors/images/overlays/check.png', 16, 16),
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'Overlay tooltip');
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// Installs a handler for clicks on the overlay
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overlay.addListener(mxEvent.CLICK, function(sender, evt2)
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{
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mxUtils.alert('Overlay clicked');
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});
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// Sets the overlay for the cell in the graph
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graph.addCellOverlay(cell, overlay);
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}
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else
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{
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graph.removeCellOverlays(cell);
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}
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}
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});
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// Installs a handler for double click events in the graph
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// that shows an alert box
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graph.addListener(mxEvent.DOUBLE_CLICK, function(sender, evt)
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{
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var cell = evt.getProperty('cell');
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mxUtils.alert('Doubleclick: '+((cell != null) ? 'Cell' : 'Graph'));
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evt.consume();
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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, 'Click,', 20, 20, 60, 40);
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var v2 = graph.insertVertex(parent, null, 'Doubleclick', 200, 150, 100, 40);
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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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};
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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="overflow:hidden;position:relative;width:321px;height:241px;background:url('editors/images/grid.gif')">
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</div>
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</body>
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</html>
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