125 lines
3.8 KiB
HTML
125 lines
3.8 KiB
HTML
<!--
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Copyright (c) 2006-2013, JGraph Ltd
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Edge tolerance example for mxGraph. This example demonstrates increasing
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the tolerance for hit detection on edges.
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-->
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<html>
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<head>
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<title>Edge tolerance 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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// Overrides the mouse event dispatching mechanism to update the
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// cell which is associated with the event in case the native hit
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// detection did not return anything.
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var mxGraphFireMouseEvent = mxGraph.prototype.fireMouseEvent;
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mxGraph.prototype.fireMouseEvent = function(evtName, me, sender)
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{
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// Checks if native hit detection did not return anything
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if (me.getState() == null)
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{
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// Updates the graph coordinates in the event since we need
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// them here. Storing them in the event means the overridden
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// method doesn't have to do this again.
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if (me.graphX == null || me.graphY == null)
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{
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var pt = mxUtils.convertPoint(this.container, me.getX(), me.getY());
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me.graphX = pt.x;
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me.graphY = pt.y;
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}
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var cell = this.getCellAt(me.graphX, me.graphY);
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if (this.getModel().isEdge(cell))
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{
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me.state = this.view.getState(cell);
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if (me.state != null && me.state.shape != null)
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{
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graph.container.style.cursor = me.state.shape.node.style.cursor;
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}
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}
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}
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if (me.state == null)
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{
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graph.container.style.cursor = 'default';
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}
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mxGraphFireMouseEvent.apply(this, arguments);
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};
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// Overrides double click handling to use the tolerance
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var mxGraphDblClick = mxGraph.prototype.dblClick;
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mxGraph.prototype.dblClick = function(evt, cell)
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{
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if (cell == null)
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{
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var pt = mxUtils.convertPoint(this.container,
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mxEvent.getClientX(evt), mxEvent.getClientY(evt));
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cell = this.getCellAt(pt.x, pt.y);
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}
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mxGraphDblClick.call(this, evt, cell);
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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.setTolerance(20);
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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,', 120, 120, 80, 30);
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var v2 = graph.insertVertex(parent, null, 'World!', 400, 250, 80, 30);
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var e1 = graph.insertEdge(parent, null, '', v1, v2, 'edgeStyle=orthogonalEdgeStyle;');
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var e2 = graph.insertEdge(parent, null, '', v2, v1, 'edgeStyle=orthogonalEdgeStyle;');
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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;width:641px;height:481px;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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