js画图开发库--mxgraph--[validation-验证.html]
![js画图开发库--mxgraph--[validation-验证.html]](http://img.e-com-net.com/image/product/91fdb298db6148a88b931e0631940f85.png)
<!Doctype html>
<html xmlns=http://www.w3.org/1999/xhtml>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<title>验证</title>
<!-- 如果本文件的包与src不是在同一个目录,就要将basepath设置到src目录下 -->
<script type="text/javascript">
mxBasePath = '../src';
</script>
<!-- 引入支持库文件 -->
<script type="text/javascript" src="../src/js/mxClient.js"></script>
<!-- 示例代码 -->
<script type="text/javascript">
// 程序在此方法中启动
function main(container)
{
// 检测浏览器兼容性
if (!mxClient.isBrowserSupported())
{
mxUtils.error('Browser is not supported!', 200, false);
}
else
{
var xmlDocument = mxUtils.createXmlDocument();
var sourceNode = xmlDocument.createElement('Source');
var targetNode = xmlDocument.createElement('Target');
var subtargetNode = xmlDocument.createElement('Subtarget');
// 在容器中创建图形
var graph = new mxGraph(container);
graph.setConnectable(true);
graph.setTooltips(true);
graph.setAllowDanglingEdges(false);
graph.setMultigraph(false);
// 源节点需要1、2个连接的目标
graph.multiplicities.push(new mxMultiplicity(
true, 'Source', null, null, 1, 2, ['Target'],
'Source Must Have 1 or 2 Targets',
'Source Must Connect to Target'));
// 源节点不希望任何传入的连接
graph.multiplicities.push(new mxMultiplicity(
false, 'Source', null, null, 0, 0, null,
'Source Must Have No Incoming Edge',
null)); // Type does not matter
// 目标需要一个传入的连接
graph.multiplicities.push(new mxMultiplicity(
false, 'Target', null, null, 1, 1, ['Source'],
'Target Must Have 1 Source',
'Target Must Connect From Source'));
// 使用默认下拉菜单
new mxRubberband(graph);
// 按下[删除]时，删除单元格
var keyHandler = new mxKeyHandler(graph);
keyHandler.bindKey(46, function(evt)
{
if (graph.isEnabled())
{
graph.removeCells();
}
});
// 自动验证（如果你使用的是mxEditor实例，使用editor.validation= true）
var listener = function(sender, evt)
{
graph.validateGraph();
};
graph.getModel().addListener(mxEvent.CHANGE, listener);
// 创建默认端口
var parent = graph.getDefaultParent();
// 开始更新事务
graph.getModel().beginUpdate();
try
{
var v1 = graph.insertVertex(parent, null, sourceNode, 20, 20, 80, 30);
var v2 = graph.insertVertex(parent, null, targetNode, 200, 20, 80, 30);
var v3 = graph.insertVertex(parent, null, targetNode.cloneNode(true), 200, 80, 80, 30);
var v4 = graph.insertVertex(parent, null, targetNode.cloneNode(true), 200, 140, 80, 30);
var v5 = graph.insertVertex(parent, null, subtargetNode, 200, 200, 80, 30);
var v6 = graph.insertVertex(parent, null, sourceNode.cloneNode(true), 20, 140, 80, 30);
var e1 = graph.insertEdge(parent, null, '', v1, v2);
var e2 = graph.insertEdge(parent, null, '', v1, v3);
var e3 = graph.insertEdge(parent, null, '', v6, v4);
//var e4 = graph.insertEdge(parent, null, '', v1, v4);
}
finally
{
// 结束更新事务
graph.getModel().endUpdate();
}
}
};
</script>
</head>
<!-- 页面载入后启动程序. -->
<body onload="main(document.getElementById('graphContainer'))">
<!-- 创建带网格壁纸和曲线的一个容器 -->
<div id="graphContainer"
style="position:relative;overflow:hidden;width:321px;height:281px;background:url('editors/images/grid.gif');cursor:default;">
</div>
</body>
</html>