163 lines
4.5 KiB
HTML
163 lines
4.5 KiB
HTML
<!--
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Copyright (c) 2006-2013, JGraph Ltd
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Shape example for mxGraph. This example demonstrates how to
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implement and use a custom shape.
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-->
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<html>
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<head>
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<title>Shape 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 custom shape -->
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<script type="text/javascript">
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/*
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The example shape is a "3D box" that looks like this:
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____
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/ /|
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/___/ |
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|___|/
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The code below defines the shape. The BoxShape function
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it the constructor which creates a new object instance.
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*/
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function BoxShape()
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{
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mxCylinder.call(this);
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};
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/*
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The next lines use an mxCylinder instance to augment the
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prototype of the shape ("inheritance") and reset the
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constructor to the topmost function of the c'tor chain.
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*/
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mxUtils.extend(BoxShape, mxCylinder);
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// Defines the extrusion of the box as a "static class variable"
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BoxShape.prototype.extrude = 10;
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/*
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Next, the mxCylinder's redrawPath method is "overridden".
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This method has a isForeground argument to separate two
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paths, one for the background (which must be closed and
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might be filled) and one for the foreground, which is
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just a stroke.
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Foreground: /
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_____/
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____
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Background: / |
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/ |
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| /
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|____/
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*/
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BoxShape.prototype.redrawPath = function(path, x, y, w, h, isForeground)
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{
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var dy = this.extrude * this.scale;
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var dx = this.extrude * this.scale;
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if (isForeground)
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{
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path.moveTo(0, dy);
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path.lineTo(w - dx, dy);
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path.lineTo(w, 0);
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path.moveTo(w - dx, dy);
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path.lineTo(w - dx, h);
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}
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else
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{
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path.moveTo(0, dy);
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path.lineTo(dx, 0);
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path.lineTo(w, 0);
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path.lineTo(w, h - dy);
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path.lineTo(w - dx, h);
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path.lineTo(0, h);
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path.lineTo(0, dy);
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path.lineTo(dx, 0);
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path.close();
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}
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};
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mxCellRenderer.registerShape('box', BoxShape);
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</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 DOM node.
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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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// Changes the default style for vertices "in-place"
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// to use the custom shape.
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var style = graph.getStylesheet().getDefaultVertexStyle();
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style[mxConstants.STYLE_SHAPE] = 'box';
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// Adds a spacing for the label that matches the
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// extrusion size
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style[mxConstants.STYLE_SPACING_TOP] = BoxShape.prototype.extrude;
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style[mxConstants.STYLE_SPACING_RIGHT] = BoxShape.prototype.extrude;
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// Adds a gradient and shadow to improve the user experience
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style[mxConstants.STYLE_GRADIENTCOLOR] = '#FFFFFF';
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style[mxConstants.STYLE_SHADOW] = true;
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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, 'Custom', 20, 20, 80, 60);
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var v2 = graph.insertVertex(parent, null, 'Shape', 200, 150, 80, 60);
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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;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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