tree的点击事件

xml 代码

<?xml version="1.0"?>

<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>

<window id="treeRDF" title="RDF Tree"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script  src="script/tree.js" />
<label value="Things in my house:"/>

<tree flex="1" width="450" height="300" seltype="single" onselect="onAccountClick('tree2')" id="tree2"
      datasources="things.rdf" ref="urn:things:root">

  <treecols>
    <treecol id="name" label="Name" primary="true" flex="1"/>
    <treecol id="material" label="Material" flex="1"/>
  </treecols>

  <template>
    <treechildren>
      <treeitem uri="rdf:*">
        <treerow>
          <treecell label="rdf:http://www.xulplanet.com/rdf/example#name"/>
          <treecell label="rdf:http://www.xulplanet.com/rdf/example#material"/>
        </treerow>
      </treeitem>
    </treechildren>
  </template>
</tree>

</window>

这是xul页面，我是通过rdf传数据的，它的rdf文件是这样的，文件名叫things.rdf

xml 代码

<?xml version="1.0"?>

<RDF:RDF xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
         xmlns:things="http://www.xulplanet.com/rdf/example#">

   <RDF:Description about="urn:things:kitchen" things:name="Kitchen"/>
   <RDF:Description about="urn:things:bedroom" things:name="Bedroom"/>
   <RDF:Description about="urn:things:basement" things:name="Basement"/>

   <RDF:Description about="urn:things:toaster" things:name="Toaster" things:material="Aluminum"/>
   <RDF:Description about="urn:things:sink" things:name="Sink" things:material="Steel"/>
   <RDF:Description about="urn:things:spicerack" things:name="Spice Rack" things:material="Cedar"/>
   <RDF:Description about="urn:things:bed" things:name="Bed" things:material="Oak"/>
   <RDF:Description about="urn:things:lavalamp" things:name="Lava Lamp" things:material="Lava"/>
   <RDF:Description about="urn:things:junk" things:name="Junk" things:material="Unknown"/>
   <RDF:Description about="urn:things:morejunk" things:name="More Junk" things:material="Unknown"/>
   <RDF:Description about="urn:things:coffin" things:name="Coffin" things:material="Pine"/>

  <RDF:Seq about="urn:things:root">
    <RDF:li>
      <RDF:Seq about="urn:things:kitchen">
        <RDF:li resource="urn:things:toaster"/>
        <RDF:li resource="urn:things:sink"/>
        <RDF:li resource="urn:things:spicerack"/>
       </RDF:Seq>
       <RDF:Seq about="urn:things:bedroom">
         <RDF:li resource="urn:things:bed"/>
         <RDF:li resource="urn:things:lavalamp"/>
       </RDF:Seq>
       <RDF:Seq about="urn:things:basement">
         <RDF:li resource="urn:things:junk"/>
         <RDF:li resource="urn:things:morejunk"/>
         <RDF:li resource="urn:things:coffin"/>
       </RDF:Seq>
    </RDF:li>
  </RDF:Seq>

</RDF:RDF>

js代码：function onAccountClick(treeID)
{
  var tree =  document.getElementById(treeID);
    var selection = tree.contentView.getItemAtIndex( tree.currentIndex );
    var foo = selection.firstChild.firstChild.getAttribute("label");
    alert(foo);
}

这里要注意的是tree.contentView.getItemAtIndex( tree.currentIndex );
不是所有的tree都有getItemAtIndex这个方法，只有Content Tree和RDF Content Tree这两种类型的树才有，你可以用alert(tree.contentView)就可以知道是哪种类型的树了．