| 发表于：2007-06-27 20:10:24 楼主 |
我是想实现懒装入，在树刚展开的时候只显示第一层节点，等到要展开具体的第二层节点的时候再到后台去读数据。现在只能展开第一层节点，点击展开节点的那个加号没有反应。麻烦帮我看看是怎么回事。谢谢！
jsp页面如下
<script type= "text/javascript ">
dojo.require（ "dojo.widget.* ");
dojo.require（ "dojo.widget.treev3 ");
dojo.require（ "dojo.widget.treenodev3 ");
dojo.require（ "dojo.widget.treelinkextension ");
dojo.require（ "dojo.widget.treeselectorv3 ");
dojo.require（ "dojo.widget.treerpccontroller ");
dojo.require（ "dojo.widget.treeloadingcontrollerv3 ");
dojo.require（ "dojo.widget.treecontextmenu ");
dojo.require（ "dojo.widget.treedociconextension ");
dojo.require（ "dojo.widget.treedisablewrapextension ");
dojo.hostenv.writeincludes（);
</script>
<style>
.mycssclass {
font-family: arial, helvetica, sans-serif;
font-size: 18px;
font-style: italic;
}
.treeicontreenonleaficonnodetype1{
background-image: url（ ' <%=request.getcontextpath（)%> /images/mailbox1.gif ');
}
.treeicontreeleaficonnodetype1{
background-image: url（ ' <%=request.getcontextpath（)%> /images/closed.gif ');
}
</style>
</head>
<body>
<script type= "text/javascript ">
var controller = dojo.widget.createwidget（ "treeloadingcontrollerv3 ",
{widgetid: "controller ", dndcontroller: "create ",
rpcurl: " <%=request.getcontextpath（)%> /getmenutree.do "});
var link = dojo.widget.createwidget（ "treelinkextension ", {widgetid: "link "});
var docicons = dojo.widget.createwidget（ "treedociconextension ", {widgetid: "docicons "});
var disablewrap = dojo.widget.createwidget（ "treedisablewrapextension ", {widgetid: "disablewrap "});
var treeselector = dojo.widget.createwidget（ "treeselectorv3 ", {widgetid: "treeselector "});
dojo.event.topic.subscribe（ "nodeselected ", "treeselectfired ");
dojo.addonload（function（){
//var kw = {url:controller.rpcurl, sync: "true "};
//controller.runrpc（kw);
//controller.dndcontroller = "create ";
var treenodes = <%=request.getattribute（ "strmenus ")%> ;
/*
var treenodes = [
{ "isfolder ":false, "title ": "title1 ", "tree ": "roottree ", "objectid ": "775161 ", "widgetid ": "775161 "},
{ "isfolder ":true, "title ": "title2 ", "tree ": "roottree ", "objectid ": "775162 ", "widgetid ": "775162 "} ];
*/
var tree = dojo.widget.createwidget（ "treev3 ",
{widgetid: "menutree ", listeners: [controller.widgetid,treeselector.widgetid, link.widgetid, docicons.widgetid, disablewrap.widgetid],
"toggle ": "wipe ", dndmode: "between " });
/**
lazy initialization is in effect
only root-level widgets will be created
*/
//controller.loadprocessresponse（tree, str);
tree.setchildren（treenodes);
//controller.expandtolevel（tree, 1);
document.body.appendchild（tree.domnode);
});
function treeselectfired（) {
alert（ "treeselectfired ");
// get a reference to the treeselector and get the selected node
var treeselector = dojo.widget.manager.getwidgetbyid（ 'treeselector ');
var treenode = treeselector.selectednodes[0];
// get a reference to the songdisplay div
var hostdiv = document.getelementbyid（ "songdisplay ");
var isfolder = treenode[ 'isfolder '];
if （ !isfolder) {
var song = treenode[ 'title '];
var url = treenode[ 'url '];
//treenode.object = { href: 'http://www.google.com/ ' };
link（url);
} else {
}
}
function link（url){
//alert（url);
if（url){
parent.rightframe.location.href=url;
}
}
function init（) {
//get a reference to the treeselector
var treeselector = dojo.widget.manager.getwidgetbyid（ 'treeselector ');
//connect the select event to the function treeselectfired（)
dojo.event.connect（treeselector, 'select ', 'treeselectfired ');
}
dojo.addonload（init);
</script>
</body>
</html>
java代码如下
list <menu> menus = getmenus（);
jsonarray result = new jsonarray（);
if （menus != null && menus.size（) > 0) {
listiterator <menu> itmenus = menus.listiterator（);
while （itmenus.hasnext（)) {
menu m = itmenus.next（);
try {
jsonobject jsonmenuobject = new jsonobject（);
jsonmenuobject.put（ "title ", m.getname（));
/*
jsonmenuobject.put（ "childiconsrc ", "../images/ "
+ m.getimage（));
*/
jsonmenuobject.put（ "nodedoctype ", m.getimage（));
jsonmenuobject.put（ "isfolder ", mgr.haschildren（m));
jsonmenuobject.put（ "widgetid ", m.getnumber（));
jsonmenuobject.put（ "objectid ", m.getnumber（));
/*
jsonarray children = getchildren（m);
if （children.length（) > 0){
jsonmenuobject.put（ "isfolder ", true);
jsonmenuobject.put（ "children ", children);
}else{
jsonmenuobject.put（ "isfolder ", false);
jsonmenuobject.put（ "url ", m.getaction（));
}
*/
result.put（jsonmenuobject);
} catch （jsonexception e) {
e.printstacktrace（);
}
}
}
strmenus = result.tostring（);
// strmenus = "[{title: \ "node 1\ " ,children: [{title: \ "node
// 1.1\ "},{title: \ "node 1.2\ "} ]}, {title: \ "node 2\ " }] ";
/*
httpservletresponse response = getresponse（);
response.setcontenttype（ "text/json; charset=gb2312 ");
printwriter out = response.getwriter（);
system.out.println（strmenus);
out.write（strmenus);
*/
system.out.println（strmenus);
return success; |
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