mxgraph 之 让流程图文件(xml格式)以图的方式显示在面板上
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
<!-- $Id: uiconfig.html,v 1.6 2010-01-02 09:45:14 gaudenz Exp $ Copyright (c) 2006-2010, JGraph Ltd UIConfig example for mxGraph. This example demonstrates using a config file to configure the toolbar and popup menu in mxEditor.--><html><head><title>UIConfig example</title><!-- Sets the basepath for the library if not in same directory --><!-- Loads and initiaizes the library --><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><!-- Loads and initiaizes the library --> <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> <!-- Example code --><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><!-- Page passes the container for the graph to the grogram --><body onload="main();" 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
*******************结束的格叽格叽************************
感动比不上心动,Lysh,你心动过么? 1 楼 qikitty 2011-09-01 能发我一份源码么?356657939@qq.com 2 楼 lynnlysh 2011-09-02 mxgraphShow.html qikitty 写道能发我一份源码么?356657939@qq.com
mxgraphShow.html 就是所需源码
新建web项目
将它和mxgraph.xml 放在WebRoot下,然后将附件中的图片放在webRoot/images/start_event_empty.png
下。
启动tomcat服务器 运行mxgraphShow.html页即可 3 楼 torch921 2011-09-09 大虾,你好,我刚刚开始用mxGraph,有些问题想请教您,能加下QQ么?
我的是39306859 4 楼 lynnlysh 2011-09-20 torch921 写道大虾,你好,我刚刚开始用mxGraph,有些问题想请教您,能加下QQ么?
我的是39306859
你直接在这问吧,我如果会就回答,不会的话被真正的大虾看到也能帮你解答 ^_^ 5 楼 xiaotiantian-58 2012-01-04 楼主你好,我刚开始学习mxgraph,有些问题想请教您,加我吧,我的QQ:734373252 6 楼 lynnlysh 2012-02-02 xiaotiantian-58 写道楼主你好,我刚开始学习mxgraph,有些问题想请教您,加我吧,我的QQ:734373252
刚开始入门你可以从mxgraph的例子开始学,然后不会的地方看它的docs文件夹中的api文档。它的例子基本涵盖了mxgraph技术的各种应用,并且难度由浅入深。我就是这么学的,比问别人方便。就不加qq了哈 ^_^ 7 楼 hty1902 2012-03-30 楼主,我准备用mxgraph画拓扑图,能用你这种方法从数据库读出设备,然后在页面上画出来吗? 8 楼 lynnlysh 2012-05-30 hty1902 写道楼主,我准备用mxgraph画拓扑图,能用你这种方法从数据库读出设备,然后在页面上画出来吗?
mxgraph可以画拓扑图,但不一定用xml代码方式存在后台中. 9 楼 zxxcjb 2012-06-25 xml里面有中文,直接解析不出来,怎怒解决呀?