dtree

    最近在做设备管理系统的需求规约文档，今天弄好了，想想以后会用到dtree。所以我就看了看dtree。
下面是dtree.js中的内容。这个dtree中节点带有复选框。
function StringBuilder() {//add a function to increase speed
    this.__strings__ = new Array;
}

StringBuilder.prototype.append = function (str) {
    this.__strings__.push(str);
};

StringBuilder.prototype.toString = function () {
    return this.__strings__.join("");
};
var hashmap=new Hash();
function Node(id, pid, name, hasCheckbox, check, readOnly, open, url, title, target, icon, iconOpen,isError) {
this.id = id;
this.pid = pid;
this.name = name;
this.url = url;
this.title = title;
this.target = target;
this.icon = icon;
this.iconOpen = iconOpen;
this.isError = isError;
this._io = open || false;
this._is = false;
this._ls = false;
this._hc = false;
this._ai = 0;
this._p;
this._ic = check || false;
this._ro= readOnly || false;
this.hasCheckbox = hasCheckbox;
};

// Tree object
function dTree(objName,imageUrl) {
if (imageUrl==null) imageUrl = '/skins/default/images/treeimages/';
if (objName==null) objName = 'Tree';
this.config = {
target : null,
folderLinks : true,
useSelection : true,
useCookies : true,
useLines : true,
useIcons : false,
useStatusText : false,
closeSameLevel : false,
inOrder : false,
useCheckbox4c :true,
useCheckbox4p :true,
preOpenChecked:true
,
relationCheck:true //是否加载父子的check关系，比如check父的时候所有子节点被check
}
this.icon = {
root : imageUrl+'base.gif',
folder : imageUrl+'folder.gif',
folderOpen : imageUrl+'folderopen.gif',
node : imageUrl+'page.gif',
empty : imageUrl+'empty.gif',
line : imageUrl+'line.gif',
join : imageUrl+'join.gif',
joinBottom : imageUrl+'joinbottom.gif',
plus : imageUrl+'plus.gif',
plusBottom : imageUrl+'plusbottom.gif',
minus : imageUrl+'minus.gif',
minusBottom : imageUrl+'minusbottom.gif',
nlPlus : imageUrl+'nolines_plus.gif',
nlMinus : imageUrl+'nolines_minus.gif'
};
this.obj = objName;
this.aNodes = [];
this.aIndent = [];
this.root = new Node(-1);
this.selectedNode = null;
this.selectedFound = false;
this.completed = false;
};

// Adds a new node to the nodes array
dTree.prototype.add = function(id, pid, name, hasCheckbox, check, readOnly, open, url, title, target, icon, iconOpen, isError) {
this.aNodes[this.aNodes.length] = new Node(id, pid, name, hasCheckbox, check, readOnly, open, url, title, target, icon, iconOpen, isError);
if(hashmap.containsKey(pid)){//key:parent id value :array which record childs' id
var arrayValue=hashmap.getItem(pid).value;
arrayValue.push(this.aNodes.length-1);
}else{
var tempArray=new Array();
tempArray.push(this.aNodes.length-1);
hashmap.add(pid,tempArray);
}
};


// Open/close all nodes
dTree.prototype.openAll = function() {
this.oAll(true);
};
dTree.prototype.closeAll = function() {
this.oAll(false);
};

// Outputs the tree to the page
dTree.prototype.toString = function() {
var str = '<div class="dtree">\n';
if (document.getElementById) {
if (this.config.useCookies)this.selectedNode = this.getSelected();
str += this.addNode(this.root);
} else str += 'Browser not supported.';
str += '</div>';
if (!this.selectedFound) this.selectedNode = null;
this.completed = true;
return str;
};

// Creates the tree structure
dTree.prototype.addNode = function(pNode) {
var addNodesb=new StringBuilder();
var n=0;
if (this.config.inOrder) n = pNode._ai;
var childArray=hashmap.getItem(pNode.id).value;//get pNode's childs
for (var i=0; i<childArray.length; i++) {
        n=childArray[i];
var cn = this.aNodes[n];
cn._p = pNode;
cn._ai = n;
this.setCS(cn);
if (!cn.target && this.config.target) cn.target = this.config.target;
if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);
if (cn._hc && this.config.preOpenChecked && this.hasCheckedChild(cn)) cn._io = true;
if (!cn._ic && this.config.useCookies && ((this.config.useCheckbox4c && !cn._hc)||(this.config.useCheckbox4p && cn._hc)) && (cn.hasCheckbox )) cn._ic = this.isChecked(cn.id);
if (!this.config.folderLinks && cn._hc) cn.url = null;
if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) {
cn._is = true;
this.selectedNode = n;
this.selectedFound = true;
}
addNodesb.append(this.node(cn, n));
if (cn._ls) break;
}
return addNodesb.toString();
};

// Creates the node icon, url and text
dTree.prototype.node = function(node, nodeId) {
   var sb= new StringBuilder() ;
  sb.append('<div class="dTreeNode">');
sb.append('<table class="dTreeTable" border="0" cellspacing="0" cellpadding="0" ><tr><td>');
sb.append(this.indent(node, nodeId));
if (this.config.useIcons) {
if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);
if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;
if (this.root.id == node.pid) {
node.icon = this.icon.root;
node.iconOpen = this.icon.root;
}
sb.append('<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '"border = 0 alt="" />');
}
//checkbox
if (((this.config.useCheckbox4c && !node._hc)||(this.config.useCheckbox4p && node._hc))&& (node.hasCheckbox)){
sb.append('</td><td><input type=checkbox id="c' + this.obj + nodeId+'" name="check' + this.obj + '" value="'+node.id+'" ');
if (node._ic) sb.append('checked ');
if (node._ro) sb.append('disabled ');
sb.append('onClick="javascript: ' + this.obj + '.doCheck(' + nodeId + ');"/>&nbsp;');
}
sb.append('</td><td>');
if (node.url) {
sb.append('<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '"');
if (node.title) sb.append(' title="' + node.title + '"');
if (node.target)sb.append(' target="' + node.target + '"');
if (this.config.useStatusText) sb.append(' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ');
if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))
sb.append(' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"');
sb.append( '>');
}
else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
sb.append('<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" class="node">');
if(node.isError)
sb.append('<font color=red>'+node.name+'</font>');
else  sb.append(node.name);
if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) sb.append('</a>');
sb.append('</td></tr></table>');
sb.append('</div>');
if (node._hc) {
sb.append('<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">');
sb.append(this.addNode(node));
sb.append('</div>');
}
this.aIndent.pop();
return sb.toString();
};

// Adds the empty and line icons
dTree.prototype.indent = function(node, nodeId) {
var subsb= new StringBuilder() ;
if (this.root.id != node.pid) {
for (var n=0; n<this.aIndent.length; n++)
subsb.append('<img src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '"border=0 alt="" />');
(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
if (node._hc) {
subsb.append('<a href="javascript: ' + this.obj + '.o(' + nodeId + ');"><img id="j' + this.obj + nodeId + '"border=0 src="');
if (!this.config.useLines) subsb.append((node._io) ? this.icon.nlMinus : this.icon.nlPlus);
else subsb.append(( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) ));
subsb.append( '" alt="" /></a>');
} else subsb.append('<img src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '"border=0 alt="" />');
}
return subsb.toString();
};

// Checks if a node has any children and if it is the last sibling
dTree.prototype.setCS = function(node) {
var lastId;

if(hashmap.containsKey(node.id)){
var childArray=hashmap.getItem(node.id).value;//get pNode's childs
if(childArray.length>0){
node._hc = true;
}}
var sameParentArray = hashmap.getItem(node.pid).value;
if(sameParentArray.length>0){
var n=sameParentArray[sameParentArray.length-1];
var lastnode = this.aNodes[n];
lastId = lastnode.id;
}
if (lastId==node.id) node._ls = true;
};

// Checks if a node has any children checked
dTree.prototype.hasCheckedChild = function(node){
if(hashmap.containsKey(node.id)){
var childArray=hashmap.getItem(node.id).value;
for(var i=0;i<childArray.length;i++){
    var index = childArray[i];
    cn = this.aNodes[index];
if (cn.pid == node.id){
if(cn._ic || this.hasCheckedChild(cn)) return true;
}
}}
return false;
}

// Returns the selected node
dTree.prototype.getSelected = function() {
var sn = this.getCookie('cs' + this.obj);
return (sn) ? sn : null;
};

// Highlights the selected node
dTree.prototype.s = function(id) {
if (!this.config.useSelection) return;
var cn = this.aNodes[id];
if (cn._hc && !this.config.folderLinks) return;
if (this.selectedNode != id) {
if (this.selectedNode || this.selectedNode==0) {
eOld = document.getElementById("s" + this.obj + this.selectedNode);
eOld.className = "node";
}
eNew = document.getElementById("s" + this.obj + id);
eNew.className = "nodeSel";
this.selectedNode = id;
if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
}
};

// Toggle Open or close
dTree.prototype.o = function(id) {
var cn = this.aNodes[id];
this.nodeStatus(!cn._io, id, cn._ls);
cn._io = !cn._io;
if (this.config.closeSameLevel) this.closeLevel(cn);
if (this.config.useCookies) this.updateCookie();
};

// Checks or unchecks a checkbox
dTree.prototype.doCheck = function(id){
var cn = this.aNodes[id];
eCheck =document.getElementById('c'+this.obj+id);
if (eCheck==null)return;
cn._ic = eCheck.checked;

if(this.config.relationCheck){
if (cn._hc && cn._ic) this.checkChild(cn);
if (!cn._ic) this.uncheckParent(cn);
if(cn._hc&&(!cn._ic)) this.unCheckChild(cn);
}
if (this.config.useCookies) {
this.retainChecked();
}
}

// Checks children of a specific node
dTree.prototype.checkChild = function(pNode){
var n=0;
if (this.config.inOrder) n = pNode._ai;
for (n; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == pNode.id) {
var cn = this.aNodes[n];
eCheck = document.getElementById('c'+this.obj+n);
if (eCheck==null)continue;
cn._ic = true;
if(eCheck.checked!=cn._ic)
{
eCheck.checked=cn._ic;
                this.checkChild(this.aNodes[n])
}
if (cn._ls) continue;
}
}
}
//unchecks children of a specific node
dTree.prototype.unCheckChild = function(pNode){
var n=0;
if (this.config.inOrder) n = pNode._ai;
for (n; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == pNode.id) {
var cn = this.aNodes[n];
eCheck = document.getElementById('c'+this.obj+n);
if (eCheck==null)continue;
cn._ic = false;
if(eCheck.checked!=cn._ic)
{
eCheck.checked=cn._ic;
                this.unCheckChild(this.aNodes[n])
}
if (cn._ls) continue;
}
}
}
// Unchecks parent nodes of a specific node
dTree.prototype.uncheckParent = function(cNode){
if (cNode.pid==this.root.id || !cNode._p) return;
cn = cNode._p;
eCheck = document.getElementById('c'+this.obj+cn._ai);
if (eCheck==null)return;
cn._ic = false;
if(eCheck.checked!=cn._ic)
{
eCheck.checked=cn._ic;
this.uncheckParent(cn);
}
}

// Opens or closes all nodes
dTree.prototype.oAll = function(status) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {
this.nodeStatus(status, n, this.aNodes[n]._ls)
this.aNodes[n]._io = status;
}
}
if (this.config.useCookies) this.updateCookie();
};

// Opens the branches of the checked nodes
dTree.prototype.openChecked = function(){
for (var n=0; n<this.aNodes.length; n++) {
cn = this.aNodes[n];
if (cn._ic){
while (cn._p && cn.pid!=this.root.id && !cn._io){
cn=cn._p;
cn._io = true;
if (this.completed) this.nodeStatus(true, cn._ai, cn._ls);
}
}
}
}

// Opens the tree to a specific node
dTree.prototype.openTo = function(nId, bSelect, bFirst) {
if (!bFirst) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].id == nId) {
nId=n;
break;
}
}
}
var cn=this.aNodes[nId];
if (cn.pid==this.root.id || !cn._p) return;
cn._io = true;
cn._is = bSelect;
if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);
if (this.completed && bSelect) this.s(cn._ai);
else if (bSelect) this._sn=cn._ai;
this.openTo(cn._p._ai, false, true);
};

// Opens a specific branch
dTree.prototype.openBranch = function(nId) {
var cn=this.aNodes[nId];
if (cn.pid==this.root.id || !cn._p) return;
pNode=cn._p;
pNode._io = true;
if (this.completed) this.nodeStatus(true, pNode._ai, pNode._ls);
if (this.config.useCookies) this.updateCookie();
this.openBranch(pNode._ai);
};

// Closes all nodes on the same level as certain node
dTree.prototype.closeLevel = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) {
this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}

// Closes all children of a node
dTree.prototype.closeAllChildren = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {
if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}

// Change the status of a node(open or closed)
dTree.prototype.nodeStatus = function(status, id, bottom) {
eDiv = document.getElementById('d' + this.obj + id);
eJoin = document.getElementById('j' + this.obj + id);
if (this.config.useIcons) {
eIcon = document.getElementById('i' + this.obj + id);
eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;
}
eJoin.src = (this.config.useLines)?
((status)?((bottom)?this.icon.minusBottom:this.icon.minus):((bottom)?this.icon.plusBottom:this.icon.plus)):
((status)?this.icon.nlMinus:this.icon.nlPlus);
eDiv.style.display = (status) ? 'block': 'none';
};


// [Cookie] Clears a cookie
dTree.prototype.clearCookie = function() {
var now = new Date();
var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
this.setCookie('co'+this.obj, 'cookieValue', yesterday);
this.setCookie('cs'+this.obj, 'cookieValue', yesterday);
this.setCookie('cc'+this.obj, 'cookieValue', yesterday);
};

// [Cookie] Sets value in a cookie
dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) {
document.cookie =
escape(cookieName) + '=' + escape(cookieValue)
+ (expires ? '; expires=' + expires.toGMTString() : '')
+ (path ? '; path=' + path : '')
+ (domain ? '; domain=' + domain : '')
+ (secure ? '; secure' : '');
};

// [Cookie] Gets a value from a cookie
dTree.prototype.getCookie = function(cookieName) {
var cookieValue = '';
var posName = document.cookie.indexOf(escape(cookieName) + '=');
if (posName != -1) {
var posValue = posName + (escape(cookieName) + '=').length;
var endPos = document.cookie.indexOf(';', posValue);
if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));
else cookieValue = unescape(document.cookie.substring(posValue));
}
return (cookieValue);
};

// [Cookie] Returns ids of open nodes as a string
dTree.prototype.updateCookie = function() {
var sb = new StringBuilder();
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._io ) {
if (sb.toString()) sb.append( '.');
sb.append(this.aNodes[n].id);
}
}
this.setCookie('co' + this.obj, sb.toString());
};

// [Cookie] Store ids of checked nodes in a cookie
dTree.prototype.retainChecked = function() {
var sb = new StringBuilder();
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._ic ) {
if (sb.toString()) sb.append( '.');
sb.append(this.aNodes[n].id);
}
}
this.setCookie('cc' + this.obj, sb.toString());
};

// [Cookie] Checks if a node id is open
dTree.prototype.isOpen = function(id) {
var str = this.getCookie('co' + this.obj);
if (str=='')return false;
var aOpen = str.split('.');
for (var n=0; n<aOpen.length; n++)
if (aOpen[n] == id) return true;
return false;
};

// [Cookie] Checks if a node is checked
dTree.prototype.isChecked = function(id){
var str = this.getCookie('cc' + this.obj);
if (str=='')return false;
var aChecked = str.split('.');
for (var n=0; n<aChecked.length; n++)
if (aChecked[n] == id) return true;
return false;

}

// If Push and pop is not implemented by the browser
if (!Array.prototype.push) {
Array.prototype.push = function array_push() {
for(var i=0;i<arguments.length;i++)
this[this.length]=arguments[i];
return this.length;
}
};
if (!Array.prototype.pop) {
Array.prototype.pop = function array_pop() {
lastElement = this[this.length-1];
this.length = Math.max(this.length-1,0);
return lastElement;
}
};

在使用的时候，根据dtree的构造函数来创建树。树的节点内容通过ajax动态地从数据库中存取。
举个例子：
aTree = new dTree('aTree','/pm/skins/common/image/dtree/',checkFun);
//checkFun是一个js的函数。
增加节点：
aTree.add("loadr"+pId,pId,'load……',false,false,false,searchTxt.length>0,'','','',empGif,empGif);
aTree.add("e"+divItem.id,pId,divItem.name,true,divItem.selected,false,searchTxt.length>0,'','','',empGif,empGif);

评论

1 楼 66573334 2010-11-18  

额，有工程吗，代码太多，还有修改的时候怎么用，是异步嘛？