由于DWZ中只能统一的改变图标，这个地方对它进行了修改可以给节点添加对应的icon。使用方法是：
<li class="t_1" value="123" iconCls="home_icon"><a href="#">asdasd</a> <ul> <li class="t_1" iconCls="home_icon"><a href="#" target="navTab">asd</a></li> <li class="t_1"><a href="#" target="navTab">asdasd</a></li> </ul> </li> <li class="t_1" value="123" iconCls="home_icon"><a href="#">asdasd</a> <ul> <li class="t_1"><a href="#" target="navTab">asd</a></li> <li class="t_1"><a href="#" target="navTab">asdasd</a></li> </ul> </li>
对于LI添加iconCls即可，cls是对应的css，给个样例的css：
.tree .home_icon {background:url(../images/home.png) no-repeat}
图标是22px*22px的，但是里面真正的占用的是16px*16px居中的。
下面是修改好的dwz.tree.js
修改的地方坐了备注的
/**
* @author Roger Wu
* @version 1.0
* added extend property oncheck
*/
(function($){
$.extend($.fn, {
jTree:function(options) {
var op = $.extend({checkFn:null, selected:"selected", exp:"expandable", coll:"collapsable", firstExp:"first_expandable", firstColl:"first_collapsable", lastExp:"last_expandable", lastColl:"last_collapsable", folderExp:"folder_expandable", folderColl:"folder_collapsable", endExp:"end_expandable", endColl:"end_collapsable",file:"file",ck:"checked", unck:"unchecked"}, options);
return this.each(function(){
var $this = $(this);
var cnum = $this.children().length;
$(">li", $this).each(function(){
var $li = $(this);
var first = $li.prev()[0]?false:true;
var last = $li.next()[0]?false:true;
$li.genTree({
selfIcon:(typeof($li.attr("iconCls"))=="undefined")?'':$li.attr('iconCls'),//自加，用于判断节点是否添加了iconCls
icon:$this.hasClass("treeFolder"),
ckbox:$this.hasClass("treeCheck"),
options: op,
level: 0,
exp:(cnum>1?(first?op.firstExp:(last?op.lastExp:op.exp)):op.endExp),
coll:(cnum>1?(first?op.firstColl:(last?op.lastColl:op.coll)):op.endColl),
showSub:(!$this.hasClass("collapse") && ($this.hasClass("expand") || (cnum>1?(first?true:false):true))),
isLast:(cnum>1?(last?true:false):true)
});
});
setTimeout(function(){
if($this.hasClass("treeCheck")){
var checkFn = eval($this.attr("oncheck"));
if(checkFn && $.isFunction(checkFn)) {
$("div.ckbox", $this).each(function(){
var ckbox = $(this);
ckbox.click(function(){
var checked = $(ckbox).hasClass("checked");
var items = [];
if(checked){
var tnode = $(ckbox).parent().parent();
var boxes = $("input", tnode);
if(boxes.size() > 1) {
$(boxes).each(function(){
items[items.length] = {name:$(this).attr("name"), value:$(this).val(), text:$(this).attr("text")};
});
} else {
items = {name:boxes.attr("name"), value:boxes.val(), text:boxes.attr("text")};
}
}
checkFn({checked:checked, items:items});
});
});
}
}
$("a", $this).click(function(event){
$("div." + op.selected, $this).removeClass(op.selected);
var parent = $(this).parent().addClass(op.selected);
$(".ckbox",parent).trigger("click");
event.stopPropagation();
$(document).trigger("click");
if (!$(this).attr("target")) return false;
});
},1);
});
},
subTree:function(op, level) {
return this.each(function(){
$(">li", this).each(function(){
var $this = $(this);
var isLast = ($this.next()[0]?false:true);
$this.genTree({
selfIcon:(typeof($this.attr("iconCls"))=="undefined")?'file':$this.attr('iconCls'),//自加属性，用于具有父亲节点的节点
icon:op.icon,
ckbox:op.ckbox,
exp:isLast?op.options.lastExp:op.options.exp,
coll:isLast?op.options.lastColl:op.options.coll,
options:op.options,
level:level,
space:isLast?null:op.space,
showSub:op.showSub,
isLast:isLast
});
});
});
},
genTree:function(options) {
var op = $.extend({selfIcon:options.selfIcon,icon:options.icon,ckbox:options.ckbox,exp:"", coll:"", showSub:false, level:0, options:null, isLast:false}, options);
return this.each(function(){
var node = $(this);
var tree = $(">ul", node);
var parent = node.parent().prev();
var checked = 'unchecked';
if(op.ckbox) {
if($(">.checked",parent).size() > 0) checked = 'checked';
}
if (tree.size()>0) {
node.children(":first").wrap("<div></div>");
// 设置class，设置的是具有子节点的node。
var cls = '';
if(op.icon) {
if(op.showSub) {
if(op.selfIcon != '') {cls = op.selfIcon;}
else {cls = op.options.folderColl;}
} else {
if(op.selfIcon != '') {cls = op.selfIcon;}
else {cls = op.options.folderExp}
}
}
$(">div", node).prepend("<div class='" + (op.showSub ? op.coll : op.exp) + "'></div>"+(op.ckbox ?"<div class='ckbox " + checked + "'></div>":"")+(op.icon?"<div class='"+cls+"'></div>":""));
op.showSub ? tree.show() : tree.hide();
$(">div>div:first,>div>a", node).click(function(){
var $fnode = $(">li:first",tree);
if($fnode.children(":first").isTag('a')) tree.subTree(op, op.level + 1);
var $this = $(this);
var isA = $this.isTag('a');
var $this = isA?$(">div>div", node).eq(op.level):$this;
if (!isA || tree.is(":hidden")) {
$this.toggleClass(op.exp).toggleClass(op.coll);
if (op.icon) {
$(">div>div:last", node).toggleClass(op.options.folderExp).toggleClass(op.options.folderColl);
}
}
(tree.is(":hidden"))?tree.slideDown("fast"):(isA?"":tree.slideUp("fast"));
return false;
});
addSpace(op.level, node);
if(op.showSub) tree.subTree(op, op.level + 1);
} else {
// 具有父亲节点的节点的属性，在subTree中已经处理过，这个地方队没有父亲节点的节点做一个补充处理
var cls = '';
if(op.selfIcon == '') {
cls = 'file';
} else {
cls = op.selfIcon;
}
node.children().wrap("<div></div>");
$(">div", node).prepend("<div class='node'></div>"+(op.ckbox?"<div class='ckbox "+checked+"'></div>":"")+(op.icon?"<div class='"+cls+"'></div>":""));
addSpace(op.level, node);
if(op.isLast)$(node).addClass("last");
}
if (op.ckbox) node._check(op);
$(">div",node).mouseover(function(){
$(this).addClass("hover");
}).mouseout(function(){
$(this).removeClass("hover");
});
if($.browser.msie)
$(">div",node).click(function(){
$("a", this).trigger("click");
return false;
});
});
function addSpace(level,node) {
if (level > 0) {
var parent = node.parent().parent();
var space = !parent.next()[0]?"indent":"line";
var plist = "<div class='" + space + "'></div>";
if (level > 1) {
var next = $(">div>div", parent).filter(":first");
var prev = "";
while(level > 1){
prev = prev + "<div class='" + next.attr("class") + "'></div>";
next = next.next();
level--;
}
plist = prev + plist;
}
$(">div", node).prepend(plist);
}
}
},
_check:function(op) {
var node = $(this);
var ckbox = $(">div>.ckbox", node);
var $input = node.find("a");
var tname = $input.attr("tname"), tvalue = $input.attr("tvalue");
var attrs = "text='"+$input.text()+"' ";
if (tname) attrs += "name='"+tname+"' ";
if (tvalue) attrs += "value='"+tvalue+"' ";
ckbox.append("<input type='checkbox' style='display:none;' " + attrs + "/>").click(function(){
var cked = ckbox.hasClass("checked");
var aClass = cked?"unchecked":"checked";
var rClass = cked?"checked":"unchecked";
ckbox.removeClass(rClass).removeClass(!cked?"indeterminate":"").addClass(aClass);
$("input", ckbox).attr("checked", !cked);
$(">ul", node).find("li").each(function(){
var box = $("div.ckbox", this);
box.removeClass(rClass).removeClass(!cked?"indeterminate":"").addClass(aClass)
.find("input").attr("checked", !cked);
});
$(node)._checkParent();
return false;
});
var cAttr = $input.attr("checked") || false;
if (cAttr) {
ckbox.find("input").attr("checked", true);
ckbox.removeClass("unchecked").addClass("checked");
$(node)._checkParent();
}
},
_checkParent:function(){
if($(this).parent().hasClass("tree")) return;
var parent = $(this).parent().parent();
var stree = $(">ul", parent);
var ckbox = stree.find(">li>a").size()+stree.find("div.ckbox").size();
var ckboxed = stree.find("div.checked").size();
var aClass = (ckboxed==ckbox?"checked":(ckboxed!=0?"indeterminate":"unchecked"));
var rClass = (ckboxed==ckbox?"indeterminate":(ckboxed!=0?"checked":"indeterminate"));
$(">div>.ckbox", parent).removeClass("unchecked").removeClass("checked").removeClass(rClass).addClass(aClass);
parent._checkParent();
}
});
})(jQuery);