mxgraph 之让流程图文件（xml格式）以图的方式显示在面板上

lynnlysh · 发表于 2013-2-7 16:49:44

mxgraph有encode 和decode方法，既然可以通过encode编码为xml文件：
var encoder = new mxCodec();var node = encoder.encode(graph.getModel());
那么解码成图像也可以实现：
var req = mxUtils.load('jbpm/mxgraph.xml'); var root = req.getDocumentElement(); var dec = new mxCodec(root); dec.decode(root, graph.getModel());  graph.getModel().endUpdate();
需要注意的是：
mxgraph.xml中自定义的style在这个解码图像的js中也要写一遍，如：
var style = new Object();style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_IMAGE;style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;style[mxConstants.STYLE_IMAGE] = 'editors/images/bigicon/start_event_empty.png';style[mxConstants.STYLE_IMAGE_WIDTH] = '48';style[mxConstants.STYLE_IMAGE_HEIGHT] = '48';style[mxConstants.STYLE_FONTCOLOR] = '#000000';style[mxConstants.STYLE_VERTICAL_LABEL_POSITION] = mxConstants.ALIGN_CENTER;graph.getStylesheet().putCellStyle('start-s', style);
完整的一个显示xml流程图的代码：
mxgraphShow.html
<html><head><title>UIConfig example</title><link rel="stylesheet" type="text/css" href="ext-3.3.0/resources/css/ext-all.css" /><script type="text/javascript" src="ext-3.3.0/adapter/ext/ext-base.js"></script><script type="text/javascript" src="ext-3.3.0/ext-all.js"></script><script type="text/javascript">mxBasePath = 'ext-3.3.0/src';</script> <script type="text/javascript" src="ext-3.3.0/mxclient-chrome.js"></script><script type="text/javascript" src="ext-3.3.0/mxclient-ff.js"></script><script type="text/javascript" src="ext-3.3.0/mxclient-ie.js"></script> <script type="text/javascript">// Program starts here. Creates a sample graph in the// DOM node with the specified ID. This function is invoked// from the onLoad event handler of the document (see below).function main(){// Checks if the browser is supportedif (!mxClient.isBrowserSupported()){// Displays an error message if the browser is not supported.mxUtils.error('Browser is not supported!', 200, false);}else{var container = document.getElementById('lala');container.style.position = 'absolute';container.style.overflow = 'hidden';container.style.left = '0px';container.style.top = '0px';container.style.right = '0px';container.style.bottom = '0px';document.body.appendChild(container); var model = new mxGraphModel();var graph = new mxGraph(container, model);var style = new Object();style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_IMAGE;style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;style[mxConstants.STYLE_IMAGE] = 'images/start_event_empty.png';style[mxConstants.STYLE_IMAGE_WIDTH] = '48';style[mxConstants.STYLE_IMAGE_HEIGHT] = '48';style[mxConstants.STYLE_FONTCOLOR] = '#000000';style[mxConstants.STYLE_VERTICAL_LABEL_POSITION] = mxConstants.ALIGN_CENTER;graph.getStylesheet().putCellStyle('start-s', style);graph.getModel().beginUpdate(); var req = mxUtils.load('mxgraph.xml');    var root = req.getDocumentElement();    var dec = new mxCodec(root);    dec.decode(root, graph.getModel()); graph.getModel().endUpdate();  }}</script></head><body  style="margin:0px;"><table width="100%" height="100%" border="0" cellspacing="0" cellpadding="0"><tr><td><div id="lala"></div></td></tr></table></body></html>

mxgraph.xml
<mxGraphModel>  <root> <mxCell id="0"/> <mxCell id="1" parent="0"/> <mxCell id="2" style="start-s" vertex="1" parent="1">    <mxGeometry x="130" y="40" width="60" height="60" as="geometry"/> </mxCell>  </root></mxGraphModel>
将附件中图片放在webRoot/images/start_event_empty.png
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感动比不上心动，Lysh，你心动过么？

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mxgraph 之 让流程图文件（xml格式）以图的方式显示在面板上

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mxgraph 之让流程图文件（xml格式）以图的方式显示在面板上