Dojo学习14 dijit.Tree 捕获点击事件(execute)

14. dijit.Tree 捕获点击事件(execute)
对于Tree的点击事件,和通常的事件处理是一样的,都是publish 和 subscribe来实现的。
程序如下:
======================
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
        "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
 <title>Dijit Tree Test</title>
 <style type="text/css">
  @import "../../dojo/resources/dojo.css";
  @import "../themes/tundra/tundra.css";
  @import "css/dijitTests.css";
 </style>
 <script type="text/javascript" src="testBidi.js"></script>
 <script type="text/javascript" src="../../dojo/dojo.js"
  djConfig="parseOnLoad: true, isDebug: true"></script>
 <script language="JavaScript" type="text/javascript">
  dojo.require("dojo.data.JsonItemStore");
  dojo.require("dijit.Tree");
  dojo.require("dojo.parser"); // scan page for widgets and instantiate them
    log = console.debug;   
    function treeHandler(message) {        
      var nodeWidget = message.node;
      if (nodeWidget == null) {
     return;
      }
      log(message.event);    
      var nodeLabel = nodeWidget.label;
      var nodeItem  = nodeWidget.item;
   
      log('>>> nodeLabel: '    + nodeLabel);
      log('>>> nodeItem.id:  ' + nodeItem.id);
      log('>>> nodeItem.type:  ' + nodeItem.type);
      //log('>>> nodeItem.sex:  ' + nodeItem.sex);
      //other props

    }
   
   
    function init() {
     //add listener
     dojo.subscribe("tree", null, treeHandler);    
     
    }   
    dojo.addOnLoad(init);

 </script>
</head>
<body class="tundra">
 <h1 class="testTitle">Dijit Tree Test</h1>
 <div dojoType="dojo.data.JsonItemStore" jsId="continentStore"
  url="../tests/countries.json"></div>
 <div dojoType="dijit.Tree" id=tree store="continentStore" query="{type:'continent'}"
  labelAttr="name" typeAttr="type"></div>
 <button onclick="dijit.byId('tree').destroyRecursive();">destroy</button>&nbsp;&nbsp;
 <button onclick="addChildren()">publish</button>
</body>
</html>

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