js樹型控件

/******************************************************************/
* FileName: MzTreeView.js                                       *
* Author:   meizz(梅花雪)                                       *
* Version: 1.0                                                 *
* Subject: Web TreeView Class                                  *
* Begin:    2004-10-18                                          *
* Download: http://www.meizz.com/Web/Download/MzTreeView10.rar *
*                                                                *
*      You may use this code on a public web site only           *
*      this entire copyright notice appears unchanged            *
*      and you clearly display a link to                         *
*                            *

/*________________________________________________________________*/
function MzTreeView(Tname)
{
String.prototype.getParam = function(name) //Get value from arguments by name
{
    var reg = new RegExp("(^|;|//s)"+name+"//s*(=|:)//s*(/"|/')([^//3;]*)//3(//s|;|$)", "i");
    var r = this.match(reg); if (r!=null) return r[4]; return "";
};
function getObjectById(id)
{
    if (typeof(id) != "string" || id == "") return null;
    if (document.all) return document.all(id);
    if (document.getElementById) return document.getElementById(id);
    try {return eval(id);} catch(e){ return null;}
}
if(typeof(Tname) != "string" || Tname == "")
    throw(new Error(-1, '創建類實例的時候請把類實例的引用變量名傳遞進來！'));

this.divider = "_";
this.url      = "#";
this.target   = "_self";

var highLight = "#0A246A";
var highLightText = "#FFFFFF";
var mouseOverBgColor= "#D4D0C8";

this.icons    = {
    L0        : 'L0.gif', //┏
    L1        : 'L1.gif', //┣
    L2        : 'L2.gif', //┗
    L3        : 'L3.gif', //━
    L4        : 'L4.gif', //┃
    PM0       : 'P0.gif', //＋┏
    PM1       : 'P1.gif', //＋┣
    PM2       : 'P2.gif', //＋┗
    PM3       : 'P3.gif', //＋━
    empty     : 'L5.gif',     //空白圖
    root      : 'root.gif',   //缺省的根節點圖標
    folder    : 'folder.gif', //缺省的文件夾圖標
    file      : 'file.gif',   //缺省的文件圖標

    event     : 'event.gif',
    object    : 'object.gif',
    behavior : 'behavior.gif',
    property : 'property.gif',
    method    : 'method.gif',
    collection: 'collection.gif',

    exit      : 'exit.gif'
};
this.iconsExpand = { //存放節點圖片在展開時的對應圖片
    PM0       : 'M0.gif',     //－┏
    PM1       : 'M1.gif',     //－┣
    PM2       : 'M2.gif',     //－┗
    PM3       : 'M3.gif',     //－━
    folder    : 'folderopen.gif',

    exit      : 'exit.gif'
};
this.setIconPath = function(path)
{
    for(var i in this.icons)
    {
      var tmp = this.icons[i];
      this.icons[i] = new Image();
      this.icons[i].src = path + tmp;
    }
    for(var i in this.iconsExpand)
    {
      var tmp = this.iconsExpand[i];
      this.iconsExpand[i]=new Image();
      this.iconsExpand[i].src = path + tmp;
    }
};

this.nodeHTML = function(node, AtEnd)
{
    var id   = node.id;
    var param= this.nodes[node.parentId + this.divider + id];
    var data = param.getParam("data"); if(data) data = "&"+ data;
    var url = param.getParam("url"); if(!url) url = this.url;
        url += (url.indexOf("/?")==-1?"/?":"&") +"MzTreeViewId="+ id + data;
    var target = param.getParam("target");if(!target) target = this.target;

this.loadNode = function(id) //load node's childNode
{
 var str = "(^|"+_d+")"+ id + this.divider +"[^"+_d+ this.divider +"]+("+_d+"|$)"
 var reg = new RegExp().compile(str, "g"), CN = this._nodes[id].childNodes;
 var ids = this.names.match(reg); str = ""; if (ids){
 var re = new RegExp(_d, "g");
 for(var i=0; i<ids.length; i++){
 var cid = ids[i].replace(re, "");CN[CN.length] = this.initNode(cid);}
 }
 this._nodes[id].isLoad = true;
};
this.initNode = function(comboId)
{
 if(typeof(comboId) != "string" || comboId.indexOf(this.divider)<0)
 throw(new Error(-1, '節點的ID（"'+ comboId +'"）不符合規則！/r/n'+
 '節點ID命名規則：由“父節點ID '+ this.divider +' 子節點ID”組合成的字符串！'));
 var param = this.nodes[comboId];
 var hint = param.getParam("hint");
 var text = param.getParam("text");
 var ids = comboId.split(this.divider);
 this._nodes[ids[1]] = {
 isLoad : false,
 id : ids[1],
 parentId: ids[0],
 position: this._nodes[ids[0]].position + this.divider + ids[1],
 icon : param.getParam("icon"),
 text : text,
 hint : hint ? hint : text,
 childNodes: new Array(),
 parentNode: this._nodes[ids[0]],
 childAppend : ""
 };
 this._nodes[ids[1]].hasChild = this.names.indexOf(_d+ids[1]+this.divider)>=0;
 return this._nodes[ids[1]];
};
this.drawNode = function(id)
{
 var d = new Date().getTime();
 var CN = this._nodes[id].childNodes, str = "";
 for (var i=0; i<CN.length; i++) str += this.nodeHTML(CN[i], i==CN.length-1);
 getObjectById(Tname +"_tree_"+ id).innerHTML = str;
}
this.toString = function()
{
 var a = new Array(); for (id in this.nodes) a[a.length] = id;
 this.names = a.join(_d+_d); this.loadNode("0");
 var rootCN = this._nodes["0"].childNodes;
 var str = "<A id='"+ Tname +"_RootLink' href='#' style='DISPLAY: none'></A>";
 if(rootCN.length>0)
 {
 for(var i=0; i<rootCN.length; i++) str += this.nodeHTML(rootCN[i], i==rootCN.length-1);
 setTimeout(Tname +".afterLoad()", 200);
 setTimeout(Tname +".expand('"+ rootCN[0].id +"', true); "+
 Tname +".focus('"+ rootCN[0].id +"'); "+ Tname +".atRootIsEmpty()",1);
 }
 return str;
};
this.click = function(id)
{
 var param= this.nodes[this._nodes[id].parentId + this.divider + id];
 var node = this._nodes[id]; eval(param.getParam("method"));
 if(!param.getParam("url") && this.url=="#") return false;
 return true;
};
this.atRootIsEmpty = function()
{
 var RCN = this._nodes["0"].childNodes;
 for(var i=0; i<RCN.length; i++)
 {
 if(RCN[i].text=="")
 {
 var node = RCN[i].childNodes[0];
 var HCN = node.hasChild;
 node.iconExpand = RCN[i].childNodes.length>1 ? HCN ? "PM0" : "L0" : HCN ? "PM3" : "L3"
 getObjectById(Tname +"_expand_"+ node.id).src = this.icons[node.iconExpand].src;
 }
 }
}
this.afterLoad= function() //load menu
{
 try{ if(this.popupMenu!="" && typeof(this.popupMenu)=="string")
 this.popupMenu = eval(this.popupMenu);}catch(e){}
};
this.popupmenu = function(id)
{
 try
 {
 if(this.popupMenu)
 {
 if(id)
 {
 this.popupMenu.data = this._nodes[id].data;
 this.popupMenu.treeviewitem = this._nodes[id];
 }
 for(var i=0; i<this.popupMenu.items.length; i++)
 {
 if(this.popupMenu.items[i].bind != "")
 this.popupMenu.items[i].bind = Tname +"_tree_"+ Tname;
 }
 this.popupMenu.show(window.event, window.event.srcElement);
 return false;
 }
 else return true;
 }catch(e){}
};
this.getPosition= function(id)
{
 var A = new Array(); A[0] = id, pid=id;
 while(id!="0" && id!="")
 {
 var str = "(^|"+_d+")([^"+_d+ this.divider +"]+"+ this.divider + id +")("+_d+"|$)";
 var ids = this.names.match(new RegExp(str, "g"));
 if(ids)
 {
 id = ids[0].replace(_d, "").split(this.divider)[0];
 A[A.length] = id;
 } else break;
 }
 return A.reverse();
};
this.focus = function(id)
{
 if(!this.currentNode) this.currentNode = this._nodes["0"];
 if(typeof(this._nodes[id])=="undefined") var apid = this.getPosition(id);
 else var apid = this._nodes[id].position.split(this.divider);
 for(var i=0; i<apid.length-1; i++) this.expand(apid[i], true);

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