tree.js

其主要的功能就是,进行后台管理模块整合. 1)其可以支持多个应用,多个模块的权限管理. 2)支持Access和MsSql200/2005. 3)采用角色来进行权限的授权,每个用户可以属于多个角色

function Folder(folderDescription, hreference) //constructor
{
  //constant data
  this.desc = folderDescription
  this.id = -1
  this.hreference = hreference
  this.navObj = 0
  this.iconImg = 0
  this.nodeImg = 0
  this.isLastNode = 0

  //dynamic data
  this.isOpen = true
  this.iconSrc = TreeImgdir+"ftv2folderopen.gif";
  this.children = new Array
  this.nChildren = 0

  //methods
  this.initialize = initializeFolder
  this.setState = setStateFolder
  this.addChild = addChild
  this.createIndex = createEntryIndex
  this.hide = hideFolder
  this.display = display
  this.renderOb = drawFolder
  this.totalHeight = totalHeight
  this.subEntries = folderSubEntries
  this.outputLink = outputFolderLink
}

function setStateFolder(isOpen)
{
  var subEntries
  var totalHeight
  var fIt = 0
  var i=0

  if (isOpen == this.isOpen)
    return

  if (browserVersion == 2)
  {
    totalHeight = 0
    for (i=0; i < this.nChildren; i++)
      totalHeight = totalHeight + this.children[i].navObj.clip.height
      subEntries = this.subEntries()
    if (this.isOpen)
      totalHeight = 0 - totalHeight
    for (fIt = this.id + subEntries + 1; fIt < nEntries; fIt++)
      indexOfEntries[fIt].navObj.moveBy(0, totalHeight)
  }
  this.isOpen = isOpen
  propagateChangesInState(this)
}

function propagateChangesInState(folder)
{
  var i=0

  if (folder.isOpen)
  {
    if (folder.nodeImg)
      if (folder.isLastNode)
        folder.nodeImg.src = TreeImgdir+"ftv2mlastnode.gif"
      else
	folder.nodeImg.src = TreeImgdir+"ftv2mnode.gif"
    	folder.iconImg.src = TreeImgdir+"ftv2folderopen.gif";
    for (i=0; i<folder.nChildren; i++)
      folder.children[i].display()
  }
  else
  {
    if (folder.nodeImg)
      if (folder.isLastNode)
        folder.nodeImg.src = TreeImgdir+"ftv2plastnode.gif";
      else
	folder.nodeImg.src = TreeImgdir+"ftv2pnode.gif";
    	folder.iconImg.src = TreeImgdir+"ftv2folderclosed.gif";
    for (i=0; i<folder.nChildren; i++)
      folder.children[i].hide()
  }
}

function hideFolder()
{
  if (browserVersion == 1) {
    if (this.navObj.style.display == "none")
      return
    this.navObj.style.display = "none"
  } else {
    if (this.navObj.visibility == "hiden")
      return
    this.navObj.visibility = "hiden"
  }

  this.setState(0)
}

function initializeFolder(level, lastNode, leftSide)
{
var j=0
var i=0
var numberOfFolders
var numberOfDocs
var nc

  nc = this.nChildren

  this.createIndex()

  var auxEv = ""

  if (browserVersion > 0)
    auxEv = "<a href='javascript:clickOnNode("+this.id+")'>"
  else
    auxEv = "<a>"

  if (level>0)
    if (lastNode) //the last 'brother' in the children array
    {
      this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' src='"+TreeImgdir+"ftv2mlastnode.gif' border=0></a>")
      leftSide = leftSide + "<img src='"+TreeImgdir+"ftv2blank.gif'>"
      this.isLastNode = 1
    }
    else
    {
      this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' src='"+TreeImgdir+"ftv2mnode.gif' border=0></a>")
      leftSide = leftSide + "<img src='"+TreeImgdir+"ftv2vertline.gif'>"
      this.isLastNode = 0
    }
  else
    this.renderOb("")

  if (nc > 0)
  {
    level = level + 1
    for (i=0 ; i < this.nChildren; i++)
    {
      if (i == this.nChildren-1)
        this.children[i].initialize(level, 1, leftSide)
      else
        this.children[i].initialize(level, 0, leftSide)
      }
  }
}

function drawFolder(leftSide)
{
  if (browserVersion == 2) {
    if (!doc.yPos)
      doc.yPos=8
    doc.write("<layer id='folder" + this.id + "' top=" + doc.yPos + " visibility=hiden>")
  }

  doc.write("<table ")
  if (browserVersion == 1)
    doc.write(" id='folder" + this.id + "' style='position:block;' ")
  doc.write(" border=0 cellspacing=0 cellpadding=0>")
  doc.write("<tr><td valign=middle>")
  doc.write(leftSide)
  this.outputLink()
  doc.write("<img name='folderIcon" + this.id + "' ")
  doc.write("src='" + this.iconSrc+"' border=0>")
  doc.write("</a></td><td valign=middle nowrap>")

  if (USETEXTLINKS)
  {
    this.outputLink()
    doc.write("</a>"+ "<a href=" + this.hreference + ">" + this.desc + "</a>")
  }
  else
  doc.write(this.desc)
  doc.write("</td>")
  doc.write("</table>")

  if (browserVersion == 2) {
    doc.write("</layer>")
  }

  if (browserVersion == 1) {
    this.navObj = doc.all["folder"+this.id]
    this.iconImg = doc.all["folderIcon"+this.id]
    this.nodeImg = doc.all["nodeIcon"+this.id]
  } else if (browserVersion == 2) {
    this.navObj = doc.layers["folder"+this.id]
    this.iconImg = this.navObj.document.images["folderIcon"+this.id]
    this.nodeImg = this.navObj.document.images["nodeIcon"+this.id]
    doc.yPos=doc.yPos+this.navObj.clip.height
  }
}

function outputFolderLink()
{

  if (this.hreference)
  {
    doc.write("<a href=" + this.hreference + " ")
    if (browserVersion > 0)
	Fold_id=Fold_id+','+this.id;
      doc.write("onClick='javascript:clickOnFolder("+this.id+")'")
    doc.write(">")
  }
  else
//    doc.write("<a>")
   if (this.id == 0)
    doc.write("<a>")
   else
Fold_id=Fold_id+','+this.id;
    doc.write("<a href='javascript:clickOnNode("+this.id+")' class=FolderStyle>")
}

function addChild(childNode)
{
  this.children[this.nChildren] = childNode
  this.nChildren++
  return childNode
}

function folderSubEntries()
{
  var i = 0
  var se = this.nChildren

  for (i=0; i < this.nChildren; i++){
    if (this.children[i].children) //is a folder
      se = se + this.children[i].subEntries()
  }

  return se
}


// Definition of class Item (a document or link inside a Folder)
// *************************************************************

function Item(itemDescription, itemLink) // Constructor
{
  // constant data
  this.desc = itemDescription
  this.link = itemLink
  this.id = -1 //initialized in initialize()
  this.navObj = 0 //initialized in render()
  this.iconImg = 0 //initialized in render()
  this.iconSrc = TreeImgdir+"ftv2folderopen.gif";

  // methods
  this.initialize = initializeItem
  this.createIndex = createEntryIndex
  this.hide = hideItem
  this.display = display
  this.renderOb = drawItem
  this.totalHeight = totalHeight
}

function hideItem()
{
  if (browserVersion == 1) {
    if (this.navObj.style.display == "none")
      return
    this.navObj.style.display = "none"
  } else {
    if (this.navObj.visibility == "hiden")
      return
    this.navObj.visibility = "hiden"
  }
}

function initializeItem(level, lastNode, leftSide)
{
  this.createIndex()

  if (level>0)
    if (lastNode) //the last 'brother' in the children array
    {
      this.renderOb(leftSide + "<img src='"+TreeImgdir+"ftv2lastnode.gif'>")
      leftSide = leftSide + "<img src='"+TreeImgdir+"ftv2blank.gif'>"
    }
    else
    {
      this.renderOb(leftSide + "<img src='"+TreeImgdir+"ftv2node.gif'>")
      leftSide = leftSide + "<img src='"+TreeImgdir+"ftv2vertline.gif'>"
    }
  else
    this.renderOb("")
}

function drawItem(leftSide)
{
  if (browserVersion == 2)
    doc.write("<layer id='item" + this.id + "' top=" + doc.yPos + " visibility=hiden>")

  doc.write("<table ")
  if (browserVersion == 1)
  doc.write(" id='item" + this.id + "' style='position:block;' ")
  doc.write(" border=0 cellspacing=0 cellpadding=0>")
  doc.write("<tr><td valign=middle>")
  doc.write(leftSide)
  if (this.link)
    doc.write("<a href=" + this.link + ">")
    doc.write("<img id='itemIcon"+this.id+"' ")
    doc.write("src='"+this.iconSrc+"' border=0>")
  if (this.link)
    doc.write("</a>")
  doc.write("</td><td valign=middle nowrap>")
  if (USETEXTLINKS && this.link)
    doc.write("<a href=" + this.link + ">" + this.desc + "</a>")
  else
  doc.write(this.desc)
  doc.write("</table>")

  if (browserVersion == 2)
    doc.write("</layer>")

  if (browserVersion == 1) {
    this.navObj = doc.all["item"+this.id]
    this.iconImg = doc.all["itemIcon"+this.id]
  } else if (browserVersion == 2) {
    this.navObj = doc.layers["item"+this.id]
    this.iconImg = this.navObj.document.images["itemIcon"+this.id]
    doc.yPos=doc.yPos+this.navObj.clip.height
  }
}


// Methods common to both objects (pseudo-inheritance)
// ********************************************************

function display()
{
  if (browserVersion == 1)
    this.navObj.style.display = "block"
  else
    this.navObj.visibility = "show"
}

function createEntryIndex()
{
  this.id = nEntries
  indexOfEntries[nEntries] = this
  nEntries++
}

// total height of subEntries open
function totalHeight() //used with browserVersion == 2
{
  var h = this.navObj.clip.height
  var i = 0

  if (this.isOpen) //is a folder and _is_ open
    for (i=0 ; i < this.nChildren; i++)
      h = h + this.children[i].totalHeight()

  return h
}


// Events
// *********************************************************

function clickOnFolder(folderId)
{
  var clicked = indexOfEntries[folderId]

  if (!clicked.isOpen)
    clickOnNode(folderId)

  return

  if (clicked.isSelected)
    return
}

function clickOnNode(folderId)
{
  var clickedFolder = 0
  var state = 0

  clickedFolder = indexOfEntries[folderId]
  state = clickedFolder.isOpen

  clickedFolder.setState(!state) //open<->close
}

function initializeDocument()
{
  if (doc.all)
    browserVersion = 1 //IE4
  else
    if (doc.layers)
      browserVersion = 2 //NS4
    else
      browserVersion = 0 //other

  treeRoot.initialize(0, 1, "")
  treeRoot.display()

  if (browserVersion > 0)
  {
    doc.write("<layer top="+indexOfEntries[nEntries-1].navObj.top+">&nbsp;</layer>")

    // close the whole tree
    clickOnNode(0)
    // open the root folder
    clickOnNode(0)
  }
}

// Auxiliary Functions for Folder-Tree backward compatibility
// *********************************************************

//---getFolderHtml
function gFld(target, description, hreference) 
{
  description="<font style=font-size:9pt; font-color: #00ff00;background-color:#ccff99>" + description
  if (hreference=="") {
    fullLink=""
  } else {
    fullLink = "'"+hreference+"' target="+target
  }
  folder = new Folder(description, fullLink)
  return folder
}

//--getLinkDocHtml
function gLnk(target, description, linkData)
{
  description="<font style=font-size:9pt; font-color: #0000ff;background-color:#ccff99>" + description
  if (linkData=="") {
    fullLink=""
  } else {
    fullLink = "'"+linkData+"' target="+target
  }
  linkItem = new Item(description, fullLink)
  return linkItem
}

//---InsertFolder
function insFld(parentFolder, childFolder)
{
  return parentFolder.addChild(childFolder)
}

//---InsertDoc
function insDoc(parentFolder, document)
{
  parentFolder.addChild(document)
}

// Global variables
// ****************

USETEXTLINKS = 1
indexOfEntries = new Array
nEntries = 0
doc = document
browserVersion = 0
selectedFolder=0