一个用JS写的树状目录
Cls_jsTree.js
/**
名称: js目录树
Name: jsTree
Release: 0.01
Author: 小竹
Revision: 2005-10-29 16:30:40
Licenses: GPL(The GNU General Public License)
Descript: js目录树
*/
var Icon={
open :'Images/folderopen.gif',
homepage :'Images/home.gif',
close :'Images/folder.gif',
file :'Images/file.gif',
help :'Images/help.gif',
join :'Images/T.gif',
joinbottom :'Images/L.gif',
plus :'Images/Tplus.gif',
plusbottom :'Images/Lplus.gif',
minus :'Images/Tminus.gif',
minusbottom :'Images/Lminus.gif',
blank :'Images/blank.gif',
line :'Images/I.gif',
mudule :'Images/mudule.gif',
root :'Images/root.gif'
};
function PreLoad(){
for(i in Icon){
var tem=Icon[i]
Icon[i]=new Image()
Icon[i].src=tem
}
}
PreLoad()
function Cls_jsTree(obj,target,ExpandOne){
this.obj=obj;
this.Tree=new Node(0)
this.Root=null
this.Nodes=new Array()
this.target=target?target:"FrameMain";
this.ie=document.all?1:0;
this.ExpandOne=ExpandOne?1:0
}
function Node(id,pid,txt,link,title,target,xicon){
this.Index=null;
this.id=id;
this.pid=pid
this.parent=null
this.txt=txt?txt:"New Item"
this.link=link
this.title=title?title:this.txt
this.target=target
this.xicon=xicon
this.indent=""
this.hasChild=false;
this.lastNode=false;
this.open=false
}
Cls_jsTree.prototype.add=function(id,pid,txt,link,title,target,xicon){
target=target?target:this.target
var nNode=new Node(id,pid,txt,link,title,target,xicon);
if(pid==this.Tree.id)nNode.open=true;
nNode.Index=this.Nodes.length
this.Nodes[this.Nodes.length]=nNode
}
Cls_jsTree.prototype.InitNode=function(oNode){
var last;
for(i=0;i
if(this.Nodes[i].pid==oNode.pid)last=this.Nodes[i].id
}
if(last==oNode.id)oNode.lastNode=true
}
Cls_jsTree.prototype.DrawLine=function(pNode,oNode){
oNode.indent=pNode.indent+(oNode.pid!=this.Tree.id&&oNode.pid!=this.Root.id?(""):'')
}
Cls_jsTree.prototype.DrawNode=function(nNode,pNode){
var str=""
var indents=""
var imgFolder=""
var nid=nNode.id
var nIndex=nNode.Index;
this.DrawLine(pNode,nNode)
if(nNode.hasChild)
indents=nNode.indent+(this.Tree.id!=nNode.pid?(""):"")
else
indents=nNode.indent+(nNode.pid==this.Tree.id?'':(""))
imgFolder=""
str+="
if(nNode.hasChild){
str+="
str+=this.DrawTree(nNode)
str+="
}
return str;
}
Cls_jsTree.prototype.DrawTree=function(pNode){
var str=""
for(var i=0;i
str+=this.DrawNode(this.Nodes[i],pNode)
return str
}
Cls_jsTree.prototype.DrawLink=function(oNode){
var str=""
sArray=oNode.txt.split('|');
dispTxt=sArray[0];
dispTitle=sArray[1];
if(oNode.txt.indexOf("|",0)==-1){dispTitle=""}
str+=" "+(oNode.link?(""+dispTxt+""):dispTxt)+""
return str
}
Cls_jsTree.prototype.toString=function(){
var str=""
for(var i=0;i
if(this.Nodes[i].pid==this.Tree.id)this.Root=this.Nodes[i]
this.InitNode(this.Nodes[i])
}
str+=this.DrawTree(this.Tree)
return str
}
Cls_jsTree.prototype.Toggle=function(nIndex,o){
var nNode=this.Nodes[nIndex]
//o.blur();
if(!nNode.hasChild)return;
if(nNode.open)this.Collapse(nNode)
else this.Expand(nNode)
}
Cls_jsTree.prototype.Expand=function(nNode){
var nid=nNode.id
var node=this.GetElm('Child'+nid)
var oicon=this.GetElm('icon'+nid)
node.style.display=''
var img1=new Image()
img1.src=(nNode.lastNode?Icon.minusbottom.src:Icon.minus.src)
if(oicon)oicon.src=img1.src
if(!nNode.xicon){
var img2=new Image()
img2.src=Icon.open.src
this.GetElm("folder"+nid).src=img2.src
}
if(this.ExpandOne)this.CloseOtherItem(nNode);
nNode.open=true
}
Cls_jsTree.prototype.Collapse=function(nNode){
var nid=nNode.id
var node=this.GetElm('Child'+nid)
var oicon=this.GetElm('icon'+nid)
node.style.display='none'
var img1=new Image()
img1.src=(nNode.lastNode?Icon.plusbottom.src:Icon.plus.src)
if(oicon)oicon.src=img1.src
if(!nNode.xicon){
var img2=new Image()
img2.src=Icon.close.src
this.GetElm("folder"+nid).src=img2.src
}
nNode.open=false
}
Cls_jsTree.prototype.ExpandAll=function(){
for(i=0;i
}
Cls_jsTree.prototype.CollapseAll=function(){
for(i=0;i
}
Cls_jsTree.prototype.CloseOtherItem=function(nNode){
for(var i=0;i
}
Cls_jsTree.prototype.Select=function(objNode,flag){
if(!this.current)this.current=objNode
this.current.className=""
objNode.className="highlight"
this.current=objNode
var a=objNode.getElementsByTagName("A")
if(a.length!=0&&flag)window.open(a[0].href,a[0].target);
if(this.ie)objNode.focus()
}
Cls_jsTree.prototype.openTo=function(nIndex){
if(nIndex<0||nIndex>=this.Nodes.length)return;
var nNode=this.Nodes[nIndex]
while(nNode){
if(!nNode.open&&nNode.hasChild)this.Expand(nNode)
nNode=nNode.parent
}
this.Select(this.GetElm("NodeItem"+this.Nodes[nIndex].id),true)
}
Cls_jsTree.prototype.GetElm=function(uid){
return document.getElementById(uid)
}